vygr_Current Folio_10K

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

 


 

FORM 10-K

 


 

 (Mark One)

 

 

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2016

OR

 

 

TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

 

For the transition period from                          to                      

Commission File Number: 001-37625 

 


 

Voyager Therapeutics, Inc.

(Exact Name of Registrant as Specified in Its Charter)

 


 

 Delaware

 

46-3003182

(State or Other Jurisdiction of

Incorporation or Organization)

 

(IRS Employer

Identification No.)

 

75 Sidney Street,
Cambridge, Massachusetts

 

02139

(Address of Principal Executive Offices)

 

(Zip Code)

(857)  259-5340 

(Registrant’s Telephone Number, Including Area Code)


Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.   Yes    No 

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes      No  

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes      No  

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S‑T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes      No  

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§ 229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.   

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer”, “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

 

 

 

 

 

 

 

Large accelerated filer

 

 

  

Accelerated filer

 

 

 

 

 

 

 

Non-accelerated filer

 

(Do not check if a smaller reporting company)

  

Smaller reporting company

 

 

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes      No  

The aggregate market value of Common Stock held by non-affiliates of the registrant computed by reference to the price of the registrant’s Common Stock as of June 30, 2016, the last business day of the registrant’s most recently completed second fiscal quarter, was approximately $156.9 million (based on the last reported sale price on the Nasdaq Global Select Market as of such date).  

As of  March 10, 2017, there were 26,848,943 shares of the registrant’s common stock, par value $0.001 per share, outstanding.

DOCUMENTS INCORPORATED BY REFERENCE 

Portions of the registrant’s definitive Proxy Statement relating to its 2017 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10‑K where indicated. Such Proxy Statement will be filed with the U.S. Securities and Exchange Commission within 120 days after the end of the fiscal year to which this report relates.

 

 


 

Table of Contents

Table of Contents

 

 

 

 

 

Page

PART I. 

 

 

 

 

Item 1. 

 

Business

 

Item 1A. 

 

Risk Factors

 

46 

Item 1B. 

 

Unresolved Staff Comments

 

89 

Item 2. 

 

Properties

 

89 

Item 3. 

 

Legal Proceedings

 

89 

Item 4. 

 

Mine Safety Disclosures

 

89 

 

 

 

 

 

PART II. 

 

 

 

 

Item 5. 

 

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

 

89 

Item 6. 

 

Selected Financial Data

 

91 

Item 7. 

 

Management’s Discussion and Analysis of Financial Condition and Results of Operations

 

93 

Item 7A. 

 

Quantitative and Qualitative Disclosures about Market Risk

 

108 

Item 8. 

 

Financial Statements and Supplementary Data

 

109 

Item 9. 

 

Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

 

109 

Item 9A. 

 

Controls and Procedures

 

109 

Item 9B. 

 

Other Information

 

110 

 

 

 

 

 

PART III. 

 

 

 

 

Item 10. 

 

Directors, Executive Officers and Corporate Governance

 

110 

Item 11. 

 

Executive Compensation

 

110 

Item 12. 

 

Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

 

110 

Item 13. 

 

Certain Relationships and Related Transactions and Director Independence

 

110 

Item 14. 

 

Principal Accountant Fees and Services

 

110 

 

 

 

 

 

PART IV. 

 

 

 

 

Item 15. 

 

Exhibits and Financial Statement Schedules

 

111 

Item 16. 

 

Form 10-K Summary

 

111 

 

 

 

 

 

Signatures 

 

 

 

F-33

 

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Forward-Looking Statements

This Annual Report on Form 10-K contains forward-looking statements that involve substantial risks and uncertainties. All statements other than statements of historical facts contained in this Annual Report on Form 10-K, including statements regarding our strategy, future operations, future financial position, future revenue, projected costs, prospects, plans, objectives of management and expected market growth, are forward-looking statements. These statements involve known and unknown risks, uncertainties and other important factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements.

The words “anticipate,” “believe,” “estimate,” “expect,” “intend,” “may,” “plan,” “predict,” “project,” “target,” “potential,” “will,” “would,” “could,” “should,” “continue,” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. These forward-looking statements include, among other things, statements about:

 

·

our ability to continue to advance VY-AADC01 through the current Phase 1b clinical trial as a treatment for advanced Parkinson’s disease and advance VY-AADC02 into later-stage clinical trials;

 

·

our ability to advance our other programs through preclinical development and into clinical trials, and successfully complete such clinical trials;

 

·

our ability to file an Investigational New Drug application, or IND, for our VY-SOD101 program for a monogenic form of amyotrophic lateral sclerosis in late 2017,  and file INDs for two other of our preclinical programs in the next 24 months; 

 

·

the accuracy of our estimates regarding expenses, future revenues and capital requirements;

 

·

our ability to continue to develop our product engine;

 

·

our ability to develop a manufacturing capability compliant with current good manufacturing practices for our product candidates;

 

·

our ability to access or develop devices to deliver our AAV gene therapies to discrete regions of the CNS;

 

·

regulatory developments in the United States and the European Union and other important geographies such as Japan;  

 

·

our ability to obtain and maintain intellectual property protection for our proprietary assets;

 

·

the size of the potential markets for our product candidates and our ability to serve those markets;

 

·

the rate and degree of market acceptance of our product candidates for any indication once approved;

 

·

our ability to obtain additional financing when needed; and

 

·

the success of competing products that are or become available for the indications that we are pursuing.

These forward-looking statements are only predictions and we may not actually achieve the plans, intentions or expectations disclosed in our forward-looking statements, so you should not place undue reliance on our forward-looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in the forward-looking statements we make. We have based these forward-looking statements largely on our current expectations and projections about future events and trends that we believe may affect our business, financial condition

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and operating results. We have included important factors in the cautionary statements included in this Annual Report on Form 10-K, particularly in Part I, Item 1A. Risk Factors that could cause actual future results or events to differ materially from the forward-looking statements that we make. Our forward-looking statements do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures or investments we may make.

You should read this Annual Report on Form 10-K and the documents that we have filed as exhibits to the Annual Report on Form 10-K with the understanding that our actual future results may be materially different from what we expect. We do not assume any obligation to update any forward-looking statements whether as a result of new information, future events or otherwise, except as required by applicable law.

PART I

ITEM 1.      BUSINESS

We are a clinical-stage gene therapy company focused on developing life-changing treatments for patients suffering from severe diseases of the central nervous system, or CNS. We focus on CNS diseases where we believe an adeno-associated virus, or AAV, gene therapy approach that either increases or decreases the production of a specific protein can slow or reduce the symptoms experienced by patients, and therefore have a clinically meaningful impact on their disease. We have built a product engine that we believe positions us to be the leading company at the intersection of AAV gene therapy and severe CNS disease. Our product engine enables us to engineer, optimize, manufacture and deliver our AAV-based gene therapies that have the potential to provide durable activity following a single administration directly to the CNS. Our team of experts in the fields of AAV gene therapy and neuroscience first identifies and selects severe CNS diseases that are well-suited for treatment using AAV gene therapy. We then engineer and optimize AAV vectors for delivery to the targeted tissue or cells. Our manufacturing process employs an established system to enable future production of high quality AAV vectors at commercial-scale. Finally, we leverage established routes of administration and advances in dosing techniques to optimize delivery of our AAV gene therapies directly to discrete regions of the brain or more broadly to the spinal cord region.

AAV gene therapy is a particularly attractive treatment approach for CNS diseases that are caused by well-defined genetic mutations. Due to the limited treatment options available for many CNS diseases, there remains a significant unmet medical need and an opportunity for AAV gene therapy to potentially transform the lives of many patients with severe CNS diseases. Based upon clinical data generated to date, we believe that durable gene expression may be achievable following a single administration of AAV gene therapy. Recent advances in delivery techniques allow for targeted delivery of AAV vectors, which are modified, non-replicating versions of AAV, to discrete regions of the CNS.

The company’s pipeline consists of six programs for CNS indications, including advanced Parkinson's disease; a monogenic form of amyotrophic lateral sclerosis, or ALS; Huntington's disease; Friedreich's ataxia; frontotemporal dementia / Alzheimer’s disease; and severe, chronic pain. Our product candidates may be eligible for orphan drug designation, breakthrough therapy designation, or other expedited review processes in the US, Europe, or Japan. Our most advanced clinical candidate, VY-AADC01 for the treatment of advanced Parkinson's disease, is being evaluated in an open-label, Phase 1b clinical trial.  Preliminary data from Cohorts 1 and 2 from this trial were reported in December 2016, and we plan to report data from Cohort 3 during mid-2017 with plans to begin a larger, double-blind, placebo-controlled trial in the fourth quarter of 2017. In early 2017, we announced lead candidate selection for VY-SOD101 for the treatment of a monogenic form of ALS and expect to submit an Investigational New Drug Application, or IND, for this candidate in late 2017. Our other preclinical programs target severe CNS indications where loss or abnormal expression of a specific gene has been identified as the cause of the disease. Over the next 24 months, we plan to file INDs for two of our other preclinical programs, namely VY-HTT01 for Huntington’s disease and VY-FNX01 for Friedreich’s ataxia. In November 2016, we elected to deprioritize the development of VY-SMN101 for spinal muscular atrophy due to, among other things, the significant progress we have made in our other preclinical programs and the evolving competitive landscape.

Our pipeline of AAV gene therapy programs is summarized in the table below:  

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Picture 1

In February 2015, we entered into a strategic collaboration with Sanofi-Genzyme to leverage our combined expertise and assets to develop AAV gene therapies for certain severe CNS diseases. Under the agreement, we received $65.0 million in upfront cash, a $30.0 million upfront equity investment, and an in-kind commitment of $5.0 million, totaling $100.0 million. Additionally, we are eligible to receive up to $745.0 million in option and milestone payments while retaining U.S. commercial rights to most programs. Under the terms of the collaboration, Sanofi-Genzyme has the ability to opt-in for ex-U.S. rights to VY-AADC01, VY-FXN01, and the ability to opt-in to ex-U.S. rights and co-promotion rights in the U.S. for VY-HTT01. Voyager retains worldwide rights to VY-SOD101, VY-TAU01, and VY-NAV01 programs.

Our most advanced clinical candidate, VY-AADC01, is being evaluated for the treatment of advanced Parkinson's disease. In advanced Parkinson’s disease, the putamen, a region of the brain, is depleted of dopamine and of the aromatic L-amino acid decarboxylase, or AADC, enzyme that is responsible for converting levodopa to dopamine. Levodopa, also commonly known as L-Dopa, remains the standard of care treatment for Parkinson’s disease. VY-AADC01 is our gene therapy vector that contains the gene that encodes the AADC enzyme. The ongoing Phase 1b, open-label trial includes 15 patients with advanced Parkinson’s disease and disabling motor fluctuations, treated with a single administration of VY-AADC01. The primary objective of the trial is to assess the safety and surgical coverage of ascending doses of VY-AADC01 in the putamen, a region of the brain associated with impaired motor function in Parkinson’s disease. The secondary objectives of the trial include the assessment of AADC expression and activity in the putamen measured by F-Dopa positron emission tomography. In addition, changes in motor responses to levodopa are measured by a controlled intravenous infusion of levodopa and by measuring daily requirements for levodopa and related medications. Other secondary objectives include assessment of motor function as measured by the Unified Parkinson’s Disease Rating Scale, or UPDRS, and a patient-completed (Hauser) diary. 

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Mission and Strategy

Our mission is to become the world leader in AAV gene therapy for treating severe CNS diseases by developing transformative therapies. Our strategy to achieve this mission is to:

·

Continually invest in our AAV product engine.  We plan to continually invest in our product engine to maintain our leadership in AAV gene therapy for CNS diseases. Specifically, we intend to further develop and enhance our product engine by focusing on (i) vector engineering and optimization; (ii) manufacturing; and (iii) dosing and delivery techniques. We plan to continue generating novel AAV vectors by engineering and optimizing vectors best suited to a targeted disease. We are building an onsite, state-of-the-art process research and development facility to enable the manufacturing of high quality AAV gene therapies. We expect to utilize established and novel techniques for dosing and delivery of our AAV gene therapies to the CNS.

 

·

Establish a leadership position in commercial-scale, high quality AAV manufacturing.  We believe that manufacturing capacity and expertise are critical to successfully treating patients using gene therapy. Through one of our collaborations, with MassBiologics, a U.S. Food and Drug Administration, or FDA, licensed manufacturer affiliated with the University of Massachusetts Medical School, we are establishing a commercial-scale current good manufacturing practice, or cGMP, compliant manufacturing capability. We initiated cGMP production activities at MassBiologics in late 2016. We have also established contract manufacturing relationships with third party service providers that specialize in gene therapy and AAV vectors. We are using the baculovirus AAV production system, a technology for producing AAV vectors at scale in insect-derived cells, originally invented and developed by several members of our production team while at the National Institutes of Health, or NIH, which we continue to improve upon. We believe that having oversight through these key relationships over our own commercial manufacturing process is critical to ensuring quality product with commercial yields.

·

Optimize and advance VY-AADC01 for the treatment of advanced Parkinson's disease. We continue to evaluate the dosing and delivery of VY-AADC01 to determine the optimal and safe dose to achieve meaningful clinical benefit for the tens of thousands of patients with advanced Parkinson’s disease. Fifteen patients have been treated in the ongoing Phase 1b clinical trial of VY-AADC01, including five patients in each of the three dose-ranging Cohorts. In January 2017, we completed dosing in the five patients in Cohort 3. The five patients enrolled in Cohort 3 received similar infusion volumes of VY-AADC01 compared to Cohort 2 (up to 900 µL per putamen), but three-fold higher vector genome concentrations, representing up to a three-fold higher total dose of up to 4.5×1012 vector genomes, or vg, of VY-AADC01 compared to patients in Cohort 2 (1.5 × 1012 vg). The use of real-time, intra-operative MRI-guided delivery allowed the surgical teams to visualize the delivery of VY-AADC01 and continue to achieve greater average coverage of the putamen in Cohort 3 (42%) compared to Cohort 2 (34%) with similar infusion volumes and Cohort 1 (21%) with a lower infusion volume. 

Cohorts 1-3 employ a transfrontal (i.e., top of the head) trajectory of VY-AADC01 into the putamen. To further optimize delivery, a study exploring a posterior (i.e., back of the head) trajectory is planned. A posterior trajectory aligns the infusion of VY-AADC01 with the anatomical structure of the putamen. We believe this will result in a higher total volume of coverage of the putamen and a higher total dose of VY-AADC01, up to 9.4×1012 vg, representing a two-fold higher total dose than patients in Cohort 3 and a six-fold higher total dose than patients in Cohort 2. We are activating additional clinical trial sites and plan to dose the first patient with this trajectory in the second quarter of 2017. In the second half of 2017, a similar study will start in Poland using our baculovirus produced material, VY-AADC02. Data from these trials will help inform the design of the double-blind, placebo-controlled trial planned to begin in the fourth quarter of 2017, which will use VY-AADC02.

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·

Build a pipeline of gene therapy programs focused on severe CNS diseases.  Beyond our clinical-stage program for advanced Parkinson's disease, we have a deep pipeline of AAV gene therapy programs in various stages of preclinical development. In February 2017, we announced the selection of VY-SOD101, a clinical candidate for the treatment of ALS due to mutations in the superoxide dismutase 1, or SOD1, gene. Preclinical pharmacology and toxicology studies are now underway to support filing of an IND for VY-SOD101 during the fourth quarter of 2017. We plan to file two additional INDs for other preclinical programs over the next 24 months. We believe that our leadership position in AAV gene therapy for severe CNS diseases and our product engine provide us with the necessary capabilities to evaluate and capitalize on external opportunities. As such, we plan to opportunistically expand our pipeline through acquisition, in-licensing or other strategic transactions.

·

Retain commercialization rights to our programs. We have retained worldwide rights for our non-partnered programs and, under our collaboration with Sanofi-Genzyme, have retained U.S., or co-U.S. commercialization rights to our partnered programs. As our programs advance through late-stage clinical development, we intend to build our own sales and marketing infrastructure or partner with third parties, to support our programs where we have retained commercialization rights. We are evaluating additional partnering opportunities for our pipeline and product engine with a goal of continuing to retain major commercialization rights in the U.S.  

·

Expand our intellectual property portfolio.  We seek to have an industry leading intellectual property portfolio. To that end, we seek patent rights for various aspects of our programs, including vector engineering and construct design, our production process, and all features of our clinical products including compositions and methods of delivery. We expect to continue to expand our intellectual property portfolio by aggressively seeking patent rights for promising aspects of our product engine and product candidates.

AAV Gene Therapy for CNS Diseases

Gene therapy is an approach whereby gene expression is directly altered in patients to address the underlying cause or predominant manifestations of disease. We believe that the targeted nature of gene therapy may enable powerful treatment options, and provide these patients with meaningful and durable benefits.

While AAV gene therapy can potentially be harnessed for multiple treatment methods, we are currently focused on gene replacement and gene knockdown approaches. Gene replacement is intended to restore the expression of a protein that is not expressed, expressed at abnormally low levels or functionally mutated with loss of function. Gene knockdown, or gene silencing, is intended to reduce the expression of a pathologically mutated protein that has detrimental effects.

Our gene therapy approach uses AAV vectors which we believe are ideal vectors for gene therapy for several reasons:

Broad Applicability.  AAV is able to transduce, or transfer a therapeutic gene, into numerous cell types including target cells in the CNS.

Safety.  AAV is believed to be safe and is not known to cause any disease in humans. No vector-related SAEs have been reported in the more than 1,300 patients, including over 200 patients for CNS indications, treated with AAV gene therapy to date.

Does Not Readily Integrate.  AAV does not readily integrate into the genome of the target cell, reducing the potential for oncogenesis, or the induction of cancer.

We believe that CNS diseases are well-suited for treatment with AAV gene therapy for the following reasons:

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Validated Targets.  Many CNS diseases are caused by well-defined mutations in genes and these genes represent genetically validated drug targets for AAV gene therapy.

Targeted Delivery.  Advances in delivery techniques allow for direct delivery of AAV vectors to discrete regions in the brain or broader delivery throughout the spinal cord via the cerebrospinal fluid, or CSF.

 

Durable Expression.  Long-term gene expression may be achievable in the CNS following one-time dosing and transfer of the therapeutic gene with an AAV vector. Neurons in the CNS are terminally differentiated, or no longer divide, eliminating the potential for cell division to dilute expression of the therapeutic gene. Repeated or continual dosing with direct injection of drugs into the CNS is complex, therefore a one-time AAV gene therapy has significant advantages.

Immune Privileged Site.  There is a reduced risk of harmful immune response or reduced efficacy due to localized delivery in a self-contained system.

While we are currently focused on gene replacement and gene knockdown approaches, we are also actively exploring additional potential treatment methods that can utilize an AAV vector, including the direct delivery of monoclonal antibodies to the CNS, as well as gene editing to correct or delete a gene in the cell genome.  

The Voyager Product Engine

We have built a product engine that we believe positions us to be the leading company at the intersection of AAV gene therapy and severe CNS diseases. Our team of experts in the fields of AAV gene therapy and neuroscience first identifies and selects severe CNS diseases that are well-suited for treatment using AAV gene therapy. We then apply our expertise in AAV vector engineering and optimization, process research and development, manufacturing, dosing and direct CNS delivery to generate a specific AAV gene therapy for a target disease. We believe that optimizing each of these parameters is a key factor for overall program success. We expect that our current and future pipeline programs will make use of technological advances generated with our product engine.

Disease Selection

We assess potential product programs based upon the following criteria:

Unmet Need.  There is a significant unmet medical need for the indication and substantial commercial potential.

Target Validation.  There is strong evidence that expression of a specific gene, or lack thereof, is causing, or critical to, the disease state.

Delivery Using AAV.  There is strong evidence supporting the ability to target the relevant tissue and cells using an AAV vector to achieve sufficient target gene expression.

Clinical Readouts.  The clinical impact of an AAV gene therapy can be clearly measured, including through well-accepted clinical endpoints and the use of both existing and novel biomarkers.

Scalability of Manufacturing.  Sufficient AAV vector to supply late-stage clinical development and commercialization can be manufactured.

In addition to the criteria above, we also look for groups of diseases where our knowledge can be transferred. For instance, we believe that some of the delivery parameters and imaging techniques that are employed in our VY-AADC01 program can be applied to AAV gene therapy delivery for Huntington's disease or other diseases where direct, targeted delivery to the brain is warranted. Likewise, we anticipate that our programs for a monogenic form of ALS and

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Friedreich's ataxia will all utilize intrathecal injection into the CSF within the spinal column to achieve broad transgene expression in and around the spinal cord.

Vector Engineering and Optimization

We intend to advance our multiple preclinical programs towards selection of lead clinical candidates using AAV vectors that we believe are best suited for each of our programs either through use of our existing capsids, through exercising a non-exclusive worldwide commercial license to capsid sequences covered by third parties, or by engineering or optimizing novel capsids. The key components of an AAV vector include: (i) the capsid, or the outer viral protein shell that encloses the target DNA, which includes the promoter and the therapeutic gene; (ii) the therapeutic gene, or transgene; and (iii) the promoter, or the DNA sequence that drives the expression of the transgene.

Members of our team have co-discovered many of the known naturally occurring AAV capsids and have also created promising genetically engineered AAV capsids. Genetically engineered capsids have yielded vectors with desirable properties, such as higher biological potency and enhanced tissue specificity. We believe that there is an opportunity to further optimize AAV capsids to confer desired characteristics relating to properties such as tissue specificity and immunogenicity. We have a significant effort dedicated to designing and screening for novel AAV capsids using a number of different scientific approaches. We believe that the information generated by this work will enhance our ability to rationally design AAV capsids with specific properties for particular therapeutic applications.  In September 2016, we announced a co-exclusive worldwide license agreement with the California Institute of Technology, or Caltech, related to novel AAV capsids. The license agreement covers all fields of use and includes novel AAV capsids that have demonstrated enhanced blood-brain barrier penetration for the potential treatment of CNS diseases following systemic administration of an AAV gene therapy vector.

With respect to the target DNA delivered through AAV gene therapy, we are selecting promoters that we believe have the appropriate activity and tissue selectively for our specific gene therapy programs. We are also designing transgenes to provide optimal expression once delivered to the targeted cells.

Manufacturing at Commercial Quality and Scale

The ability to produce high quality AAV vectors at commercial-scale is a critical success factor in AAV gene therapy. While at the NIH, members of our current production team invented and developed a baculovirus AAV production system, which we use and have continued to improve. This system has a number of attributes that will enable high quality commercial-scale manufacturing, including:

High Yield.  A single manufacturing run at 500-liter scale can yield many thousands of doses of an AAV gene therapy.

High Purity.  A relatively high percentage of AAV vectors contain the therapeutic DNA, reducing the number of empty capsids compared to alternative manufacturing approaches. In addition, the baculovirus system eliminates the risk of introducing mammalian cell derived impurities.

Scalability.  This process is reproducible at volumes ranging from 0.02 liters to 500 liters.

We are building a state-of-the-art process research and development production facility for manufacturing research-grade AAV vectors onsite at our Cambridge, Massachusetts headquarters and a cGMP, commercial-scale AAV manufacturing capability through our collaboration with MassBiologics, in Fall River, Massachusetts, both of which will employ our baculovirus production system. We have also established a contract manufacturing relationship with other companies specializing in the manufacture of gene therapy and AAV vectors.

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Optimized Delivery and Route of Administration

Identifying the optimal route of administration and delivery parameters for AAV gene therapy, such as infusion volume, flow rate, vector concentration and dose and formulation for a specific disease, are critical to achieving safe and effective levels of transgene expression in the targeted location in the CNS. We aim to develop clinically feasible protocols that yield reproducible results across patients. For our current pipeline programs, we are either pursuing direct injection into the brain, called intraparenchymal injection (for our advanced Parkinson's disease and Huntington's disease programs) or injection into the CSF within the cerebrospinal space, called intrathecal injection (for our SOD1 ALS and Friedreich's ataxia programs).

Intraparenchymal Injection to the Brain. We are using the ClearPoint System in the Phase 1b clinical trial of VY-AADC01 and the planned posterior trajectory trials, for the treatment of advanced Parkinson's disease to provide real-time, intra-operative, magnetic resonance imaging, or MRI, as well as state-of-the-art infusion technologies. The ClearPoint System assists the physician in visualizing the delivery of VY-AADC01 to the putamen and to avoid specific blood vessels during the surgical procedure, with the goal of maximizing coverage of the putamen and reducing the risk of hemorrhages. We are also evaluating alternative devices and systems to the ClearPoint System. The surgical approach that we are using is similar, in some respects, to the approach used for deep brain stimulation, or DBS, a marketed device-based treatment for advanced Parkinson's disease. We believe that the delivery knowledge gained from our VY-AADC01 and VY-AADC02 programs can be applied to AAV gene therapy delivery for our Huntington's disease program.  

Overview of Intraparenchymal Delivery

GRAPHIC


Courtesy of: Okinawa Institute of Science and Technology.

 

Intrathecal Injection to the Spinal Cord.  For spinal cord disorders, including monogenic ALS and Friedreich's ataxia, we believe that intrathecal injection is the optimal route of administration to achieve broad transgene expression throughout the relevant cells in the spinal cord and sensory pathways. Preclinical studies completed by us and others have demonstrated that intrathecal delivery of AAV vectors can effectively transfer the therapeutic genes to relevant cells in the spinal cord, as well as in the sensory pathways. Currently, intrathecal injection is commonly used for the delivery of various types of medications, including those to treat pain and infections.  

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Overview of Intrathecal Delivery

GRAPHIC

Overview of Our Pipeline

We have leveraged our product engine to assemble a pipeline of novel AAV gene therapies for the treatment of severe CNS diseases with high unmet medical need. Depending on the disease, our current AAV gene therapies will use either a gene replacement or gene knockdown approach. Our goal is to address the underlying cause or the predominant manifestations of a specific disease by significantly increasing or decreasing expression of the relevant proteins at targeted sites within the CNS.  

Advanced Parkinson's Disease Program: VY-AADC01 and VY-AADC02

Disease Overview

Parkinson's disease is a chronic, progressive and debilitating neurodegenerative disease that affects approximately 700,000 people in the U.S. and seven to 10 million people worldwide. It is estimated that up to 15% of the prevalent population with Parkinson’s disease, or approximately 100,000 patients in the U.S., have motor fluctuations that are refractory, or not well-controlled, with levodopa, the current standard of care. While the underlying cause of Parkinson's disease in most patients is unknown, the motor symptoms of the disease arise from a loss of neurons in the midbrain that produce the neurotransmitter dopamine. Declining levels of dopamine in this particular region of the brain leads to the motor symptoms associated with Parkinson’s disease including tremors, slow movement or loss of movement, rigidity, and postural instability. Motor symptoms during the advanced stages of the disease include falling, gait freezing, and difficulty with speech and swallowing, with patients often requiring the daily assistance of a caregiver.

While symptomatic treatments exist, there are currently no therapies that effectively slow or reverse the progression of Parkinson’s disease. Levodopa, also known as L-Dopa, remains the standard of care treatment, with its beneficial effects on symptom control having been discovered over 40 years ago. Patients are generally well-controlled with oral levodopa in the early stages of the disease, but become less responsive to treatment as the disease progresses. Patients experience longer periods of reduced mobility and stiffness termed off-time, or the time when medication is no longer providing benefit, and shorter periods of on-time when their medication is effective.

The progressive motor symptoms of Parkinson’s disease are largely due to the death of dopamine neurons in the substantia nigra, a part of the midbrain that converts levodopa to dopamine, in a single step catalyzed by the enzyme AADC. Neurons in the substantia nigra release dopamine into the putamen where the receptors for dopamine reside. In

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advanced Parkinson’s disease, neurons in the substantia nigra degenerate and the enzyme AADC is markedly reduced in the putamen, which limits the brain’s ability to convert oral levodopa to dopamine. The intrinsic neurons in the putamen, however, do not degenerate in Parkinson’s disease. VY-AADC01, comprised of the AAV2 capsid and a cytomegalovirus promoter to drive AADC transgene expression, is designed to deliver the AADC gene directly into neurons of the putamen where dopamine receptors are located, bypassing the substantia nigra neurons and enabling the neurons of the putamen to express the AADC enzyme to convert levodopa into dopamine. The approach with VY-AADC01, therefore, has the potential to durably enhance the conversion of levodopa to dopamine and provide clinically meaningful improvements in motor symptoms following a single administration.

The UPDRS is a standard clinical rating scale for Parkinson’s disease. Part III of this scale measures motor function by physician examination. The UPDRS is conducted when patients are taking their Parkinson’s disease medications (referred to as “on” medication) and when patients are not taking their Parkinson’s disease medications (referred to as “off” medication).  In addition, a patient-completed (Hauser) diary records their motor response over the course of several days as on-time, or time when they have good mobility with or without non-troublesome dyskinesia, off-time when they have poor mobility, and on-time with troublesome dyskinesia when they have uncontrolled movements. As shown in the figure below, diary on-time decreases, while off-time and dyskinesias increase as patients progress from the early honeymoon period into later stages of advanced Parkinson's disease.  

While L-Dopa and other pharmacological approaches to augmenting dopamine provide symptomatic benefit during early stages of Parkinson's disease, there are relatively limited treatment options for patients with advanced Parkinson's disease. There are two FDA approved therapies used to specifically treat advanced Parkinson's disease patients with medically refractive motor fluctuations. The first, DBS, requires the implantation of an electrical stimulation device in the body, which is connected to electrodes that are placed into the brain during neurosurgery where the patient must stay awake during the procedure. The second, marketed as DUODOPA in Europe and DUOPA in the United States, requires the surgical placement of a tube into the intestine so that medication is delivered by a pump that resides outside the body, which patients must carry with them.

We believe that the need for indwelling hardware, being awake during surgery, and the maintenance associated with each of these approaches are significant deterrents for many potential patients. Given the size of the addressable patient population with advanced Parkinson's disease and the limitations of the currently available treatment options for these patients, we believe that a significant unmet medical need exists for new treatment options.

Our Treatment Approach: “Turn Back the Clock”

We are developing VY-AADC01, an AAV gene therapy product candidate, for the treatment of advanced Parkinson's disease. VY-AADC01 is comprised of the AAV2 capsid, which has been used in multiple AAV gene therapy clinical trials for a number of different diseases, and the cytomegalovirus promoter that drives expression of the AADC transgene. VY-AADC01 is intended to deliver the AADC gene directly into the putamen. Our approach bypasses the dying neurons of the substantia nigra, allowing for the conversion of levodopa into dopamine within the putamen. We believe that our approach has the potential to provide patients with clinically meaningful improvements in motor symptoms following a single administration.

Our goal is to restore patients' responsiveness to levodopa following treatment with VY-AADC01 to "turn back the clock" on their disease such that the patients' motor symptoms are returned to a well-controlled state, consistent with the level of symptomatic benefit achieved from levodopa during the early honeymoon period. Following treatment with VY-AADC01, patients with advanced Parkinson's disease will continue to take levodopa, but we believe that the required dose will be reduced. The continued administration of levodopa will provide a means to titrate dopamine production to further optimize symptomatic control. We believe our approach will increase the conversion of dopamine from levodopa in the putamen, resulting in a clinically meaningful improvement in motor symptoms following a single administration.  

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Overview of Progression of Parkinson's Disease (PD)

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Preclinical Studies

Preclinical studies conducted by Krystof Bankiewicz, M.D., Ph.D., one of our co-founders, and his colleagues at the University of California San Francisco, or UCSF, evaluated the safety, efficacy and pharmacological activity of AAV2-AADC gene therapy, a gene therapy substantially similar to VY-AADC01, delivered directly to the putamen in a non-human primate model of Parkinson's disease. Overall, the procedure and vector were well-tolerated with no serious toxicity issues.

Positron emission tomography, or PET, imaging with tracers specific for AADC activity demonstrated a significant and sustained increase of activity in the brain region where the vector had been delivered. Increased responsiveness to levodopa was also evidenced by significant behavioral improvements observed post-treatment with the gene therapy compared to pre-treatment. In five animals, the mean improvement in behavior was determined at various doses of levodopa both one month before treatment, as a baseline measure for comparison purposes, and then again six months after treatment. A strong PET signal was observed in all five animals following treatment, confirming delivery of AADC into the putamen. Animals were significantly more sensitive to levodopa six months following treatment with the gene therapy when compared to baseline, as shown below.  

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Behavioral Response to Various Doses of levodopa Pre- and Post-Treatment with AAV2-AADC in Non-Human Primates(1) 

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(1) Adapted by permission from Macmillan Publishers Ltd; Forsayeth et al, Molecular Therapy (2006), 14 (4); 571‑577, copyright 2006. Blue line represents base line measurements and yellow line represents six months post-treatment measurements.

*   A result is considered to be statistically significant when the probability of the result occurring by random chance, rather than from the efficacy of the treatment, is sufficiently low. The conventional method for measuring the statistical significance of a result is known as the “p‑value,” which represents the probability that chance caused the result (e.g., a p-value = 0.001 means that there is a 0.1% or less probability that the difference between the control group and the treatment group is purely due to random chance).

We believe that these results provide evidence that AADC is active and being expressed at levels sufficient to measure a clinical benefit. Two animals from this cohort were followed for up to eight years following a single administration of the gene therapy and sustained PET imaging signals for AADC and behavioral signs of efficacy were observed in these animals.

The results of these preclinical studies provided support for the initiation of clinical trials.  

Previous Phase 1 Clinical Trials

In a completed open-label Phase 1 clinical trial conducted at UCSF, VY-AADC01 was delivered directly to the putamen of Parkinson's disease patients. The primary endpoints of this trial were safety and tolerability of VY-AADC01. These endpoints were met as VY-AADC01 was well-tolerated and no treatment related SAEs were reported. Furthermore, pharmacologic activity of VY-AADC01 was observed. This trial was completed prior to our involvement in the program, but used a version of VY-AADC01 that is also currently being used in the ongoing Phase 1b clinical trial. We are currently evaluating changing manufacturing platforms from a HEK 293 triple transfection process used to produce the current clinical trial material to our scalable baculovirus system utilizing Sf9 cells. We will need to show this production platform change will result in comparable vector quality and activity. Based on our discussions with the FDA, we believe that we have a good understanding of what in vitro testing and preclinical evaluations are required, which we will need to conduct in order to demonstrate comparability between the vector made with the current process and the vector made with the new system.  

The Phase 1 clinical trial at USCF was conducted in a total of 10 patients with advanced Parkinson's disease. Two doses of VY-AADC01 were tested, 9 × 1010 vector genomes, or vg, and 3 × 1011 vg, with five patients per dose cohort. The infusion volume was 100µl per putamen, or 200µl per patient. Patients in both cohorts treated with VY-AADC01 showed modest improvements in motor fluctuations. At six months following treatment, diary off-time was

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observed to be reduced by an average of approximately three hours and a corresponding increase in diary on-time without dyskinesias was also observed. In addition, at six months following treatment, an approximately 30% improvement in on-medication and off-medication measures using the Total UPDRS score, a widely used rating scale that evaluates cognitive, functional, and motor deficits, as well as medication-related complications, was observed, as shown in the table below.

Summary of UPDRS Results from Phase 1 Trial(1) 

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(1) Christine et al, Neurology (2009), 73: 1662-1669. The row titled "Low-dose cohort" represents data from the five patients treated with 9 X 1010 vg of VY-AADC01. The row titled “High-dose cohort” represents data from the five patients treated with 3 X 1011 vg of VY-AADC01. The row titled “Combined cohorts” represents data from all ten patients treated with VY-AADC01. The data in the columns under the header “Off medications” represents periods during which patients' medications were not working as measured by a patient's total UPDRS score at baseline, before treatment with VY-AADC01, and at six months following treatment with VY-AADC01, along with percent change from baseline to six months and the corresponding p-value. The data in the columns under the header "On medications" represents periods during which patients' medications were working as measured by a patient's total UPDRS score at baseline, before treatment with VY-AADC01 and at six months following treatment with VY-AADC01, along with percent change from baseline to six months and the corresponding p-value. A result is considered to be statistically significant when the probability of the result occurring by random chance, rather than from the efficacy of the treatment, is sufficiently low. The conventional method for measuring the statistical significance of a result is known as the “p‑value,” which represents the probability that chance caused the result (e.g., a p-value = 0.001 means that there is a 0.1% or less probability that the difference between the control group and the treatment group is purely due to random chance). Because of the small size of this trial, the p-values may not be reliable or repeatable, and may not be duplicated in future trials.

While no gene therapy related SAEs were reported, three patients experienced minor hemorrhages related to the surgical procedure. Two of the hemorrhages were asymptomatic, noticed only on imaging, and one was symptomatic with the patient making an almost complete recovery. Nevertheless, the stereotactic injection protocol used in the surgical procedure was modified to avoid specific blood vessels and no further hemorrhages were reported. The implementation of real-time, intra-operative MRI guidance in the ongoing Phase 1b clinical trial is a significant advancement in vector delivery.

The 10 patients were assessed clinically for up to four years after treatment and a durable, dose-dependent expression of AADC was observed. Patients treated with the low dose gene therapy were observed to have an increased PET signal, or uptake of the 18 fluoro-meta-tyrosine tracer, or 18 FMT, indicative of AADC expression and activity that persisted for up to four years. Patients treated with the high dose gene therapy were observed to have an increased PET signal that was greater on average when compared to the low dose cohort, which also persisted for up to four years.

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Long-Term AADC Expression as Measured by PET Imaging in Patients Treated with High and Low Doses of AAV Gene Therapy in a Phase 1 Clinical Trial (1)

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(1) Mittermeyer et al, Human Gene Therapy (2012), 23: 377-381. The publisher for this copyrighted material is Mary Ann Liebert, Inc. publishers. Blue lines represent patients treated with the low dose and yellow lines represent patients treated with the high dose.

A  similar Phase 1 clinical trial was conducted at Jichi Medical University, or JMU, in Japan using the same vector that was used in the UCSF trial. The primary endpoints of this trial were safety and tolerability of the treatment. These endpoints were met as the treatment was well-tolerated and no treatment related SAEs were reported. Six patients were treated in this trial and an enhanced PET signal was observed in a subset of patients monitored 96 weeks following treatment. An open-label Phase 1/2 trial is currently being conducted at JMU. The primary endpoints of this trial are safety and tolerability of the treatment. This trial is using lower infusion volumes and doses compared to the ongoing Phase 1b trial. Importantly, the JMU trial is not using real-time, intra-operative MRI guidance.

While the prior UCSF and JMU clinical results were encouraging and provided evidence of long-term AADC expression, the magnitude of the clinical benefits observed did not exceed placebo effects observed in previous surgical therapy trials in Parkinson's disease patients, and the UCSF and JMU trials were not blinded. Further, based on post-operative imaging and our current work using real-time, intra-operative MRI monitoring, we estimate that less than 10% of the putamen volume was covered by the infusion in these trials, which reflects suboptimal distribution of VY-AADC01 in the putamen. We believe that there is an opportunity to further optimize the delivery, dose and infusion volume of VY-AADC01 to substantially increase the coverage of the putamen in order to achieve a more substantial clinical benefit.

Voyager VY-AADC01 Phase 1b Program Status

In 2014, UCSF initiated an open-label Phase 1b clinical trial to optimize the development of VY-AADC01. The IND for the Phase 1b trial was filed by UCSF in July 2013 and was transferred to us in October 2015. We initiated the

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second trial site at the University of Pittsburgh Medical Center, or UPMC, in December 2015. The primary endpoints of this trial are safety and tolerability of the treatment. This trial incorporates three key design features:

1)

Use a real-time, intra-operative MRI system during surgery to assist the physician in visualizing the delivery of VY-AADC01 to the putamen and to avoid specific blood vessels during the surgical procedure, with the goal of reducing the risk of hemorrhages.

2)

Larger infusion volumes designed to increase coverage of the putamen with VY-AADC01.

3)

Higher doses of VY-AADC01 compared to the previously completed UCSF Phase 1 trial.

Secondary endpoints of this trial, which will be used to assess the potential pharmacologic activity of VY-AADC01, include UPDRS, AADC PET imaging and a behavioral test using intravenous levodopa treatment to measure changes in a patients' sensitivity to levodopa.

In December 2016, we announced interim results from this ongoing Phase 1b trial of VY-AADC01 at six and 12 months of follow-up in patients with advanced Parkinson’s disease. The interim data from Cohorts 1 and 2 of this trial demonstrated that accurate MRI-guided delivery of escalating doses of VY-AADC01 were well tolerated and resulted in increased coverage of the putamen, increased AADC enzyme activity, enhanced response to levodopa, and dose-related, clinically meaningful improvements in various measures of patients’ motor function. This was especially evident at the higher dose in Cohort 2 with improved UPDRS off medication and on medication scores, and corresponding improvements in patient-reported diary hours, suggesting higher peak effects and a longer duration of action of levodopa. These effects were maintained and in some patients improved at 12 months of follow-up. We plan to report data from Cohort 3 during mid-2017 with plans to begin a larger, double-blind, placebo-controlled trial in the fourth quarter of 2017. To further optimize delivery, a study exploring a posterior trajectory is planned with the first patient dosed in the second quarter of 2017.

We plan to manufacture VY-AADC02 in our baculovirus/Sf9 system. This will be the same vector made using a different manufacturing platform. VY-AADC01 was made in HEK 293 cells using a transient transfection process. VY-AADC02 will be used in the ex-US posterior trajectory trial and subsequent trials. We believe that VY-AADC02 will be similar or comparable to VY-AADC01. Based on our discussions with the FDA, we believe that we have a good understanding of what in vitro testing and preclinical evaluation are required, which we will need to conduct in order to demonstrate comparability between the current version and the new version. 

Our Phase 1b Data to Date – Cohorts 1 and 2

The interim results reported in December 2016 included data from all 10 patients treated in Cohorts 1 and 2 at six months (five patients in each Cohort), and where indicated, data from five patients in Cohort 1 and three patients in Cohort 2 who have reached 12 months of follow-up. Two patients in Cohort 2 did not reach the 12 month timepoint at the time of the interim update. Patients in Cohorts 1 and 2 received a single administration of VY-AADC01 at a total dose of up to 7.5×1011 vg and 1.5×1012 vg, respectively. Five patients enrolled in Cohort 1 in this study received a single administration of VY-AADC01 at a concentration of 8.3 × 1011 vg per milliliter (vg/ml) using an infusion volume of up to 450 µL per putamen, or up to 900 µL per patient, for a total dose of 7.5 × 1011 vg. Five patients enrolled in Cohort 2 received a single administration of VY-AADC01 at a concentration of 8.3 × 1011 vg/ml, using an infusion volume of up to 900 µL per putamen, or up to 1,800 µL per patient, for a total dose of 1.5 × 1012 vg. Cohort 3 patients received similar infusion volumes (up to 900 µL per putamen) of VY-AADC01 to Cohort 2 but three-fold higher vg concentrations. Patients enrolled in Cohorts 1 and 2 were on average 58 years of age with a Parkinson’s disease diagnosis for an average of 10 years. Patients were candidates for surgical intervention due to disabling motor complications despite treatment with optimal anti-Parkinsonian medication. At baseline, the average UPDRS III off medication score was 37.2 and 35.8, and the average patient diary off-time was 4.9 and 4.2 hours, for Cohort 1 and 2, respectively. Patients’ average amount of Parkinson’s disease medications, levodopa and related medications, at baseline was 1,468 mg per day for Cohort 1 and 1,636 mg per day for Cohort 2. The results below are reported as mean changes from baseline to six months, or 12 months where indicated.

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Putamen Coverage and Biomarker Data

·

The use of real-time, intra-operative MRI-guided delivery and increasing infusion volumes resulted in 21% coverage of the volume of the putamen with VY-AADC01 in Cohort 1 and 34% coverage in Cohort 2.

·

VY-AADC01 treatment resulted in a 13% increase in putaminal AADC enzyme activity in Cohort 1 and a 56% increase in putaminal AADC enzyme activity in Cohort 2 at six months relative to baseline as measured by 18F-DOPA PET scans.

·

Patients reduced their daily oral dose of levodopa and related medications by 14% in Cohort 1 and 34% in Cohort 2 at six months.  This reduction in oral medication was generally maintained at 12 months.

·

VY-AADC01 treatment prolonged the duration and markedly increased the motor symptom response to levodopa measured following a controlled intravenous infusion of levodopa administered six months after surgery when compared to baseline.

Clinical Data Summary

Treatment with VY-AADC01 resulted in the following:

·

15.6-point and 17.8-point (42% and 50%) improvement (reduction) in UPDRS-III off medication at six months in Cohort 1 and Cohort 2, respectively. These improvements were 16.4-point and 14.3-point (44% and 44%) for Cohorts 1 and 2, respectively, at 12 months.

·

9.6-point (56%) improvement (reduction) in UPDRS-III on medication in Cohort 2 at six months that was sustained at 12 months.  Cohort 1 demonstrated a 1.6-point (21%) worsening (increase) at six months that was sustained at 12 months.

·

2.2 hours (20%) increase in diary on-time (with no dyskinesias or non-troublesome dyskinesias) in Cohort 2 at six months that further increased to 4.1 hours (43%) at 12 months.  Cohort 1 showed a slight decrease in on-time at six months of 0.3 hours (-3%) and an increase of 1.6 hours (16%) at 12 months.

·

1.1 hour (27%) decrease in diary off-time in Cohort 2 at six months that further decreased to 2.2 hours (48%) at 12 months.  Decreases in diary off-time in Cohort 2 also occurred in conjunction with a reduction in troublesome dyskinesias.  Cohort 1 showed a decrease in diary off-time of 0.8 hours (16%) at six months and 1.4 hours (27%) at 12 months.

Safety Data

The surgical procedure was successfully completed in all 10 patients and infusions of VY-AADC01 have been well-tolerated with no vector-related serious adverse events (SAEs). Nine of the 10 patients were discharged from the hospital within one to two days following surgery. One patient experienced two SAEs; a pulmonary embolism or blood clot in the lungs, and related heart arrhythmia or irregular heartbeat. The patient was treated with an anti-coagulant and symptoms associated with the SAEs have completely resolved. Investigators determined that this was most likely related to immobility during the surgical procedure and subsequent formation of a blood clot, or deep vein thrombosis (DVT), in the lower extremity. Consequently, DVT prophylaxis was added to the surgical protocol and no subsequent events have been observed following implementation of these measures.  

Phase 1b Cohort 3

In January 2017, we disclosed completing dosing in the five patients in Cohort 3. The five patients enrolled in Cohort 3 received similar infusion volumes of VY-AADC01 compared to Cohort 2 (up to 900 µL per putamen), but three-fold higher vector genome concentrations, representing up to a three-fold higher total dose of up to 4.5×1012 vg of VY-AADC01 compared to patients in Cohort 2 (1.5 × 1012 vg). Patients enrolled in Cohort 3 were similar in baseline characteristics to Cohort 1 and 2. The use of real-time, intra-operative MRI-guided delivery allowed the surgical teams to visualize the delivery of VY-AADC01 and continue to achieve greater average coverage of the putamen in Cohort 3 (42%) compared to Cohort 2 (34%) with similar infusion volumes and Cohort 1 (21%) with a lower infusion volume. 

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The surgical procedure was successfully completed in all five patients. Infusions of VY-AADC01 have been well-tolerated with no vector-related serious adverse events, or SAEs, or surgical complications in Cohort 3, and all five patients were discharged from the hospital within two days following surgery. 

The Phase 1b trial remains on track to deliver six-month safety, motor function, and biomarker data from Cohort 3, as well as longer-term safety and motor function data from Cohorts 1 and 2, in mid-2017.

ALS Program: VY-SOD101

Disease Overview

ALS is a fatal neurodegenerative disease that leads to muscle atrophy, spasticity and weakness as well as impaired speech, swallowing and breathing, with many patients requiring ventilator support as the disease progresses. The average age of onset of ALS is 55 years of age, and median survival is approximately three years after initial symptoms appear. It is estimated that there are approximately 20,000 patients in the United States who are living with the disease. Familial, or inherited, ALS accounts for approximately 10% of ALS cases, and an estimated 20% of familial ALS is caused by mutations in the superoxide dismutase 1, or SOD1, gene. Therefore, there are an estimated 400 patients in the United States with ALS caused by mutations in the SOD1 gene.

The normal function of the SOD1 protein is to catalyze the conversion of superoxide anion (O2-) to hydrogen peroxide (H2O2) and oxygen (O2). Mutations in SOD1 have been shown to lead to the formation of toxic aggregates of the SOD1 protein, resulting in the dysfunction and death of motor neurons. Patients with familial ALS caused by certain mutations in the SOD1 gene progress more rapidly than patients with other forms of ALS, although the reason for this more rapid progression is unknown.

There is currently only one FDA-approved treatment for ALS, riluzole, which has been shown to have only modest efficacy, prolonging life by just a few months.

Our Treatment Approach

We believe that AAV gene therapy is an attractive approach to treating monogenic ALS caused by SOD1 mutations. Since the SOD1 gene mutations that cause ALS are toxic gain-of-function mutations, we believe that we can employ an AAV gene therapy approach that targets the knockdown of SOD1. In addition, the primary target cells - motor neurons - reside within the spinal cord, which we believe can be effectively transduced with AAV gene therapy through intrathecal injection. The mechanism of action of VY-SOD101 is knockdown of SOD1 expression in motor neurons, thereby potentially reducing the level of toxicity associated with mutated protein, and slowing functional decline and prolonging ventilator-independent survival.

We believe that there is also the potential to leverage our approach for the treatment of other genetically defined forms of ALS.

Preclinical Studies Targeting SOD1 for Monogenic ALS

Results from published preclinical studies conducted at The Ohio State University support targeting mutant SOD1 for the treatment of monogenic ALS. In a non-human primate model, significant knockdown of SOD1 expression was observed following intrathecal injection of an AAV vector carrying a transgene designed to inhibit SOD1 expression. As shown in the figure below, SOD1 protein levels in lumbar spinal cord were knocked down by greater than 80%, on average, in three non-human primates. In addition, SOD1 expression in motor neurons was observed to be knocked down by 95%, on average, compared to a control group. No side effects from the treatment were reported.

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Knockdown of SOD1 Using AAV-Mediated Delivery in Non-Human Primates(1) 

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(1) Reprinted by permission from Macmillan Publishers Ltd: Foust et al, Molecular Therapy (2013), 21 (12); 2148-2159, copyright (2013).

The knockdown of SOD1 has also been reported to provide significant survival benefits in animal models of ALS. As shown in the example below, mice with a SOD1 mutation treated with an AAV vector to knock down expression of the SOD1 gene extended median survival by 87 days compared to mice treated with a control vector.  

Improved Survival Post Knockdown of SOD1(1)

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(1) Reprinted by permission from Macmillan Publishers Ltd: Foust et al, Molecular Therapy (2013), 21 (12); 2148-2159, copyright (2013). Purple line represents mice treated with AAV gene therapy, while gray line represents control mice.

These published studies as well as our own studies provide proof-of-principle for our approach to treating monogenic ALS due to SOD1 mutations with VY-SOD101.

Our Program Status

VY-SOD101 is in preclinical development. We have selected the clinical candidate after screening a series of capsids, microRNA expression cassettes, (a segment of DNA than contains the sequence that targets SOD1 selectively for knockdown), and encoded payloads. Multiple rounds of optimization resulted in a candidate that is potent and selective for knocking down SOD1.  In addition, many construct configurations were evaluated toward the identification of one which would provide excellent yield and genome integrity for manufacturing scale-up in our baculovirus AAV manufacturing system in insect-derived cells. Preclinical data in large mammals demonstrated that a single inthrathecal

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administration resulted in significant knockdown of SOD1 in motor neurons, and based on these results, the VY-SOD101 clinical candidate was selected.

We screened more than 100 RNAi sequences, each represented by a bar in the graph below, and successfully identified multiple, highly-potent RNAi sequences targeting SOD1, as highlighted by the yellow bars in the figure below:  

Overview of miRNA Target Sequences for Knockdown of SOD1

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The most potent RNAi sequences targeting SOD1 were evaluated in multiple microRNA expression cassettes and with a number of vector genome configurations. We have completed the necessary experiments to evaluate these potential lead candidates based upon criteria that include safety, selectivity, potency, and efficiency and precision of microRNA processing.

In addition, we have evaluated multiple intrathecal dosing paradigms for the best distribution and delivery to the relevant regions and cell types of the spinal cord. We have studied parameters such as site of intrathecal administration, volume of administration and rate of infusion to identify the dosing paradigm that we believe will translate into an effective therapy in patients.

With the clinical candidate and intrathecal dosing paradigm that have been selected, we plan to complete IND-enabling studies during 2017, to support filing of an IND for VY-SOD101 during the fourth quarter of 2017. We expect that the first clinical trial of VY-SOD101 will enroll ALS patients with relevant mutations in the SOD1 gene.

Friedreich's Ataxia Program: VY-FXN01

Disease Overview

Friedreich's ataxia is a debilitating neurodegenerative disease resulting in poor coordination of legs and arms, progressive loss of the ability to walk, generalized weakness, loss of sensation, scoliosis, diabetes and cardiomyopathy as well as impaired vision, hearing and speech. The typical age of onset is 10 to 12 years, and life expectancy is severely reduced with patients generally dying of neurological and cardiac complications between the ages of 35 and 45. According to the Friedreich's Ataxia Research Alliance, there are approximately 6,400 patients living with the disease in the United States. There are currently no FDA-approved treatments for the disease.

Friedreich's ataxia patients have mutations of the FXN gene that reduce production of the frataxin protein, resulting in the degeneration of sensory pathways and a variety of debilitating symptoms. Friedreich's ataxia is an autosomal recessive disorder, meaning that a person must obtain a defective copy of the FXN gene from both parents in order to develop the condition. One healthy copy of the FXN gene, or 50% of normal frataxin protein levels, is sufficient to prevent the disease phenotype. We therefore believe that restoring FXN protein levels to at least 50% of normal levels by AAV gene therapy might lead to a successful therapy.

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Our Treatment Approach

We are developing an AAV gene therapy approach that we believe will deliver a functional version of the FXN gene to the sensory pathways through intrathecal or intravenous injection. We think this approach has the potential to improve balance, ability to walk, sensory capability, coordination, strength and functional capacity of Friedreich's ataxia patients. Most Friedreich's ataxia patients produce low levels of the frataxin protein, which although insufficient to prevent the disease, exposes the patient's immune system to frataxin. This reduces the likelihood that the FXN protein expressed by AAV gene therapy will trigger a harmful immune response.

Preclinical Studies

We conducted preclinical studies in non-human primates and achieved high FXN expression levels within the target sensory ganglia, or clusters of neurons, along the spinal region following intrathecal injection. As depicted in the figure below, FXN expression was normalized as a fold increase relative to FXN expression in a human brain reference sample. The levels of FXN expression observed using an AAV vector were, on average, greater than FXN levels present in normal human brain tissue. The increased levels of FXN were achieved in cervical, thoracic, lumbar and sacral levels. Relatively low, but measurable, levels of FXN expression were also observed in the cerebellar dentate nucleus, another area of the CNS that is often affected in Friedreich's ataxia, and that is often considered difficult to target therapeutically.

FXN Expression in Sensory Ganglia Following Intrathecal Delivery in Non-Human Primates

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Our Program Status

VY-FXN01 is currently in preclinical development. We are in the process of identifying a lead candidate which will comprise an optimal capsid, promoter, and FXN transgene. We are completing several AAV capsid screening experiments to identify capsids that effectively distribute to disease target tissues in a desired manner. We are comparing capsids in non-human primates following intrathecal and intravenous injection, and evaluating these capsids based upon multiple criteria including safety, overall level of transgene expression achieved, distribution of transgene expression and the specific cell types transduced. In addition, we are optimizing the promoter and specific characteristics of the FXN transgene that we expect to use for VY-FXN01. To evaluate the therapeutic potential of our vectors, we have initiated testing in a new genetic mouse model of Friedreich’s ataxia. We also have a significant effort focused on better understanding the clinical course of Friedreich's ataxia and identifying potential clinical endpoints for future clinical trials.

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Once we identify a lead candidate for this program, we plan to complete preclinical studies to evaluate the safety and efficacy of our lead candidate, including studies in a relevant animal model of Friedreich's ataxia and IND-enabling studies. We expect that the first clinical trial of VY-FXN01 will enroll Friedreich's ataxia patients.  

Huntington's Disease Program: VY-HTT01

Disease Overview

Huntington's disease is a fatal, inherited neurodegenerative disease that results in the progressive decline of motor and cognitive functions and a range of behavioral and psychiatric disturbances. The average age of onset is 39, with patients typically dying approximately 15 to 20 years following diagnosis. According to the Huntington's Disease Society of America, Huntington's disease affects approximately 30,000 patients in the United States. Huntington's disease is caused by mutations in the huntingtin, or HTT, gene. Huntington's disease is an autosomal dominant disorder, which means that an individual is at risk of inheriting the disease if only one parent is affected. More than 200,000 individuals in the United States are at risk for inheriting the mutant gene from an affected parent. While the exact function of the HTT gene in healthy individuals is unknown, it is essential for normal development before birth and mutations in the HTT gene ultimately lead to the production of abnormal intracellular huntingtin protein aggregates that cause neuronal cell death. Currently, there are no approved treatments targeting the underlying cause of the disease and only one drug, tetrabenazine, has been approved for the treatment of the specific motor symptoms of Huntington's disease.

Our Treatment Approach

We believe that AAV gene therapy is an attractive approach to treating Huntington's disease. Since HTT mutations that cause Huntington's disease are toxic gain-of-function mutations, we believe that we can employ an AAV gene therapy approach designed to knock down expression of the HTT gene. In addition, the targeted cells for treatment primarily reside in discrete regions of the brain - the striatum and the cortex - that can be targeted with AAV gene therapy delivered directly into the brain. The mechanism of action of VY-HTT01 is knockdown of HTT expression in neurons in the striatum and cortex, thereby reducing the level of toxicity associated with mutated protein in these brain regions, and slowing the progression of cognitive and motor symptoms. We believe that we can use the same surgical approach for this program that has been used for VY-AADC01 delivery to the brain, allowing us to leverage prior clinical experience.

Preclinical Studies

Our collaborators at Sanofi-Genzyme have completed significant preclinical work focused on AAV gene therapy for Huntington's disease. Sanofi-Genzyme's preclinical studies in a mouse model of Huntington's disease demonstrated the safety and efficacy of AAV gene therapy targeting the knockdown of the HTT gene in the CNS.

As shown in the figure below, using an AAV vector delivered directly to the CNS, HTT gene expression was observed to be reduced by over 50%, on average, in the treatment group as compared to the control group. No signs of toxicity were reported.  

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Knockdown of HTT Following AAV Delivery(1)

GRAPHIC


(1) Stanek et al, Human Gene Therapy (2014); 25; 461-474. The publisher for this copyrighted material is Mary Ann Liebert, Inc. publishers.

*   p<0.05

In addition, significant functional benefit was observed in the treatment group, as measured by the rotarod test to assess motor function, and the Porsolt Swim Test to measure depressive behavior in mice. In the figure below, both normal or wild type mice, and mice with the HTT mutation, or YAC128, were evaluated following treatment with either an AAV vector targeting the knockdown of the HTT gene, labeled as AAV2/1-miRNA-Htt below, or a negative control vector, labeled as AAV2/1-Null below. As expected, knocking down HTT in the control mice was observed to have no functional impact, whereas knocking down HTT in YAC128 mice was observed to have significant functional benefit.  

Reduction of Behavioral Deficits in an Animal Model of Huntington's Disease(2) 

Picture 2GRAPHIC


(2) Stanek et al, Human Gene Therapy (2014); 25; 461-474. The publisher for this copyrighted material is Mary Ann Liebert, Inc. publishers.

*   p<0.05

Our Program Status

VY-HTT01 is in preclinical development. Sanofi-Genzyme's Huntington's disease gene therapy program was combined with our efforts in connection with entering into our collaboration agreement in February 2015. We are screening a series of microRNA expression cassettes and encoded payloads.  Multiple rounds of optimization have resulted in candidates that are potent and selective for knocking down HTT.  In addition, many construct configurations were evaluated toward the identification of one which would provide excellent yield and genome integrity for manufacturing scale-up in our baculovirus AAV manufacturing system in insect-derived cells.  Preclinical data in large

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mammals have demonstrated that a single intrastriatal administration results in robust knockdown of HTT in the striatum.

Through our product engine efforts, we constructed and have screened multiple RNAi sequences within a number of miRNA cassettes.  Multiple vector genome configurations have been compared as well.  We are conducting the necessary experiments to evaluate these potential lead candidates based upon criteria that include safety, selectivity, potency, and efficiency and precision of microRNA processing. This work leverages the learnings from the VY-SOD101 program, as the miRNA cassettes and vector genome configurations that we have designed for the VY-SOD101 program are anticipated to be applicable to all of our RNAi programs, including the VY-HTT01 program. 

In addition, we are in the process of confirming in non-human primate studies that the current lead capsid is optimal for the VY-HTT01 program. The criteria include safety, overall level of transgene expression achieved, distribution of transgene expression, and the specific cell types transduced.

We are evaluating direct injection into the brain for the best distribution and delivery to the regions relevant to Huntington’s disease - striatum and cortex. Parameters such as site of administration, volume of administration, and rate of infusion are being studied to identify the dosing paradigm that we believe will translate into an effective therapy in patients.

Once we select a clinical candidate and dosing paradigm for this program, we plan to complete a number of preclinical studies to evaluate the safety, biodistribution, pharmacology and efficacy of our lead candidate, including studies in relevant animal models and IND-enabling studies. We expect that the first clinical trial of VY-HTT01 will enroll Huntington's disease patients.  

FTD/Alzheimer’s Disease Program: VY-TAU01

Disease Overview

In healthy individuals, tau is an abundant soluble cytoplasmic protein that binds to microtubules (key structural proteins in cells) to promote their stability and function. In Alzheimer’s disease, or AD, and other tauopathies, tau aggregates and forms insoluble tau-containing neurofibrillary tangles, or NFTs. The progressive spread of tau pathology along distinct anatomical pathways in the brain closely correlates with disease progression and severity in a number of tauopathies, including AD, frontotemporal lobar degeneration, or FTD, Pick’s disease, progressive supranuclear palsy, or PSP, and corticobasal degeneration. Because the extent of tau pathology in AD and other tauopathies closely correlates with the severity of neurodegeneration, synapse loss, and cognitive deficits, attempts to prevent, reduce, or slow the development of tau pathology have become important therapeutic strategies for these diseases.

In previous preclinical studies, despite high weekly or biweekly systemic doses of anti-tau monoclonal antibodies administered over three to six months, only very low levels of antibody reached the brain, resulting in a modest reduction of tau pathology by ~40–50%. This incomplete and modest reduction in tau pathology following treatment with very high and frequent systemic doses of these antibodies may pose therapeutic challenges in humans with various tauopathies.

To address these limitations, our scientists, working in collaboration with Weill Cornell Medical College, carried out a study published in the January 2017 issue of the Journal of Neuroscience where we injected an AAV vector containing a tau monoclonal antibody, PHF1, directly into the brains of P301S mice.  PHF1 was previously shown to reduce tau pathology in the brain following frequent systemic dosing. P301S mice contain a mutant form of tau that causes severe age-dependent tau pathology and neurodegeneration.  In our study, a single injection of AAV vector containing PHF1 into the hippocampus of the brains of these mice resulted in ~50-fold higher level of PHF1 antibody measured in the brain than the levels observed following a single systemic dose of the monoclonal antibody at 45 mg/kg9 and a marked reduction (up to 90%) in hippocampal insoluble pathological tau and neurofibrillary tangles, compared with mice treated

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with a control vector. In addition, the hippocampal atrophy observed in untreated P301S mice was fully rescued by treatment with the AAV vector containing PHF1.

Our Program Status

These preclinical studies provide proof of principle in an animal model of disease that AAV vectors can be used to deliver monoclonal antibodies to misfolded pathological proteins like tau to increase brain antibody levels beyond what can be achieved by traditional passive immunization (systemic injection of antibody) and to potentially enhance their therapeutic effects. With the VY-TAU01 program, using a variety of proprietary AAV capsids and routes of administration, we are optimizing the delivery of monoclonal antibodies directed against tau to treat FTD and AD.

Severe, Chronic Pain Program: VY-NAV01

Disease Overview

Nav1.7 is a sodium ion channel that is required for transmission of pain signals to the CNS. We believe that an AAV gene therapy approach targeting the knockdown of Nav1.7 in sensory neurons could be an effective treatment for certain forms of severe, chronic pain. A major challenge for the successful development of small molecules and antibodies targeting Nav1.7 has been the selective inhibition of Nav1.7 over closely related sodium channels such as Nav1.5 which are important for cardiac function. MicroRNAs, which work by harnessing the RNA interference pathway, can achieve a high level of specificity for their messenger RNA targets, and can inhibit Nav1.7 selectively over other sodium channel subtypes. Such an approach could avoid the dose-limiting side effects associated with the non-selective profile of many current drugs used to treat severe, chronic pain, and also achieve a durable clinical benefit following a single administration of the therapy. VY-NAV01 leverages our extensive experience designing novel microRNA knockdown cassettes and delivering them using AAV, an approach that we are using for our ALS (VY-SOD101) and Huntington’s disease (VY-HTT01) programs.

Our Program Status

VY-NAV01 is currently in the research stage. We are in the process of conducting proof-of-concept studies to establish the level of Nav1.7 knockdown needed to relieve pain in animal models. We will then identify a lead candidate which will comprise an optimal capsid, promoter, and microRNA targeting Nav1.7. We are completing several AAV capsid screening experiments to identify capsids that effectively distribute to pain sensory neurons in a desired manner. We are comparing capsids in non-human primates following intrathecal and intravenous injection, and evaluating these capsids based upon multiple criteria including safety, overall level of transgene expression achieved, distribution of transgene expression and the specific cell types transduced.

Future Programs

We are evaluating additional severe neurological diseases that could be treated using AAV gene therapy through application of either a gene replacement or a gene knockdown approach. Beyond these approaches, we are also actively exploring additional potential treatment methods that can utilize an AAV vector, including gene editing to correct or delete a gene in the cell genome.

For information regarding amounts spent during each of the last three fiscal years on company-sponsored research and development activities, see Part II “Item 6 – Selected Financial Data” of this Annual Report on Form 10-K.

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Collaborations and License Agreements

Sanofi-Genzyme Collaboration

In February 2015, we entered into a strategic collaboration with Sanofi-Genzyme to leverage our combined expertise and assets to develop AAV gene therapies for CNS diseases. Under the agreement, we retained U.S. rights to VY-AADC01 and VY-FXN01, as well as at least co-commercialization rights to VY-HTT01 in the United States. VY-SOD101 is not included as part of the Sanofi-Genzyme collaboration and we retain unencumbered worldwide rights to this program. We have granted Sanofi-Genzyme an exclusive option to license, develop and commercialize (i) ex-U.S. rights to the following programs, which we refer to as the Split Territory Programs, VY-AADC01, VY-FXN01, a future program to be designated by Sanofi-Genzyme, or Future Program, and VY-HTT01 with an incremental option to co-commercialize VY-HTT01 in the United States, and (ii) worldwide rights to VY-SMN101. Sanofi-Genzyme's option for the Split Territory Programs and VY-SMN101 is triggered following the completion of the first proof-of-principle human clinical study, or POP Study, on a program-by-program basis. In November 2016, we elected to deprioritize the development of VY-SMN101 for spinal muscular atrophy due to, among other things, the significant progress we have made in our other preclinical programs and the evolving competitive landscape. 

Prior to any option exercise by Sanofi-Genzyme, we will collaborate with Sanofi-Genzyme in the development of products under each Split Territory Program and VY-SMN101 pursuant to a written development plan and under the guidance of an alliance joint steering committee, comprised of an equal number of our employees and Sanofi-Genzyme employees.

We are required to use commercially reasonable efforts to develop products under each Split Territory Program and VY-SMN101 through completion of the applicable POP Study. During the development of our joint programs, our and Sanofi-Genzyme's activities are guided by a Development Advisory Committee, which we refer to as the DAC. The DAC may elect to utilize certain Sanofi-Genzyme technology relating to the VY-AADC01 program, the VY-HTT01 Program, or generally with the manufacture of Split Territory Program products.

We will be solely responsible for all costs incurred in connection with the development of Split Territory Programs and VY-SMN101 products prior to option exercise, subject to the following: (i) Sanofi-Genzyme may agree to provide additional funds in return for agreed-upon payback or other agreed economic terms; (ii) we may request, and upon mutual agreement, Sanofi-Genzyme will provide in-kind services valued at up to $5.0 million; and (iii) expenses of certain activities under the VY-HTT01 development plan may be funded to the extent such activities are reimbursed through financial support that Sanofi-Genzyme may receive from a disease foundation group.

Other than the VY-AADC01 program (for which a POP Study has already been commenced), if we do not initiate a POP Study for a given Split Territory Program by December 31, 2026 (or for the Future Program by the tenth anniversary of the date the Future Program is nominated by Sanofi-Genzyme), and Sanofi-Genzyme has not terminated this agreement with respect to such Collaboration program, then Sanofi-Genzyme shall be entitled, at its sole and exclusive remedy, to a credit of $10.0 million for each such program against other amounts payable by Sanofi-Genzyme under the Collaboration. However, if we do not initiate a POP Study by such date as a result of a regulatory delay or a force majeure event, such time period shall be extended for so long as such regulatory delay or force majeure event continues and we shall not be deemed to have failed to initiate a POP Study.

Post-Option Exercise

Upon Sanofi-Genzyme's exercise of its option to license a given product in a Split Territory Program, which we refer to as a Split Territory Licensed Product, we will have sole responsibility for the development of such Split Territory Licensed Product in the United States and Sanofi-Genzyme shall have sole responsibility for development of such Split Territory Licensed Product in the rest of the world. We and Sanofi-Genzyme will have shared responsibility for execution of ongoing development of such Split Territory Licensed Product that is not specific to either of our territories, including costs associated therewith.

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A steering committee for each Program will review and approve a written plan and budget for each relevant program. In addition, all development activities to be undertaken with respect to each Split Territory Licensed Product by or on behalf of either party will be set forth in a written development plan.

Sanofi-Genzyme shall have the sole right to develop VY-SMN101 worldwide. Sanofi-Genzyme shall be responsible for all of the development costs that occur after the option exercise date for VY-SMN101.

Commercialization

We shall be solely responsible, at our expense, for all commercialization activities relating to Split Territory Licensed Products in the United States. Sanofi-Genzyme shall be solely responsible, at its expense, for all commercialization activities relating to Split Territory Licensed Products in the rest of the world. For VY-HTT01, if Sanofi-Genzyme has exercised its option to co-commercialize VY-HTT01 in the United States, then Sanofi-Genzyme will be the lead party responsible for all VY-HTT01 commercialization activities in the United States, and these activities will be set forth in reasonable detail in a written commercialization plan.

Sanofi-Genzyme shall be solely responsible, at its expense, for all commercialization activities relating to VY-SMN101 worldwide. Sanofi-Genzyme shall use commercially reasonable efforts to commercialize VY-SMN101 in each major market specified in the agreement where Sanofi-Genzyme has obtained required governmental approvals.

Financial Terms

We received $65.0 million in upfront cash, a $30.0 million upfront equity investment and an in-kind commitment of $5.0 million, totaling $100.0 million. If Sanofi-Genzyme exercises its option for a collaboration program, with the exception of VY-AADC01, Sanofi-Genzyme is required to make an option exercise payment of $20.0 million or $30.0 million for each program. In addition, Sanofi-Genzyme shall pay us up to $645.0 million across product programs upon the achievement of specified regulatory and commercial milestones.

In addition, to the extent any Split Territory Licensed Product or the VY-SMN101 Product is commercialized, we are entitled to receive tiered royalty payments ranging from the mid-single digits to mid-teens based on a percentage of net sales. Sanofi-Genzyme is entitled to receive royalty payments from us related to sales of the Split Territory Licensed Products ranging from the low-single digits to mid-single digits, depending on whether we use Sanofi-Genzyme technology in a Split Territory Licensed Product or the VY-SMN101 Product. If Sanofi-Genzyme exercises its option to co-commercialize VY-HTT01 in the United States, we will share any profits or losses from VY-HTT01 product sales.

Term And Termination; Remedies

Our collaboration agreement with Sanofi-Genzyme will continue in effect until the later of (i) the expiration of the last to expire of the option rights and (ii) the expiration of all payment obligations unless sooner terminated by us or Sanofi-Genzyme.

We and Sanofi-Genzyme have customary termination rights including the right to terminate for an uncured material breach of the agreement committed by the other party and Sanofi-Genzyme has the right to terminate for convenience.

License Agreement with University of Massachusetts

On January 30, 2014, we entered into a license agreement with the University of Massachusetts, or UMass, pursuant to which UMass granted us an exclusive, worldwide, royalty-bearing license to certain of its licensed patents to make, have made, use, offer for sale, sell, have sold and import certain licensed products in the field of human diseases that use gene therapy applications. Our license is subject to any rights that may be required to be granted to the government of

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the United States, and UMass reserves the right to use the licensed patents for education and research and, with our consent, for non-commercial patient care, without the payment of any compensation to us.

In consideration for rights granted to us under the agreement, we made an upfront payment of $0.2 million to UMass. We are obligated to pay UMass (i) low-single digit royalty payments based on net sales of the licensed products, (ii) annual maintenance payments of $30.0 thousand, which are creditable against royalties payable in such period, (iii) minimum aggregate annual royalty payments that are creditable against royalties payable in such period, with the minimum aggregate amount payable being in the low-six digits for each of the first four years of this agreement and a minimum aggregate amount payable being in the mid-six digits for each year, thereafter, (iv) milestone payments of up to $1.8 million, per licensed product for the first five licensed products, based on the achievement of development and regulatory milestones and (v) a percentage of sublicensing income that decreases over time from low double digit percentages to a mid-single digit percentage. We also agreed to reimburse UMass approximately $0.7 million for patent related expenses incurred by UMass as of the effective date of the agreement over a two year period.

Under the agreement, we agreed to use commercially reasonable efforts to develop licensed products and to introduce such licensed products into the commercial market, and further agreed to certain development milestones.

The agreement will terminate on the date that is the later of (i) seven years after the first commercial sale of the last licensed product under the agreement or (ii) such time as there are no valid claims covering a licensed product. We have the right to terminate the agreement for any reason upon 90 days prior written notice, and we and UMass have the right to terminate the agreement if the other party fails to cure a written breach within 60 days of receiving written notice of such breach.

MassBiologics and UMass Collaboration Agreement

On October 20, 2014, we entered into a Collaboration Agreement with UMass and MassBiologics, pursuant to which we shall (i) fund certain projects that will be conducted by UMass or MassBiologics, (ii) fund certain educational programs of UMass, including post-doctoral research at our laboratories beginning in 2015 and an annual lecture series beginning in 2015 and (iii) collaborate with MassBiologics to establish scalable processes for manufacturing recombinant AAV vector products using cGMP.

In November 2014, we agreed to the first project under this agreement whereby we will fund approximately $2.9 million over a 16-month period for certain research and development services performed by MassBiologics. The project commenced in January 2015 and completed during 2016. We and UMass and/or MassBiologics may agree to conduct other projects in the future, the terms of which will be agreed upon at such time.

This agreement will remain in effect for a period of five years and automatically renews for additional one year periods. Either party has the right to terminate this agreement, once in each renewal period, for any reason upon providing the other party with 90 days written notice or in the event of a material breach of the agreement by the other party that is not cured within 60 days of written notice.

We will own all intellectual property rights generated under this agreement, either by our employees, UMass and/or MassBiologics employees, or jointly by our employees and UMass and/or MassBiologics employees, that cover AAV materials. We and UMass and/or MassBiologics, as applicable, will jointly own any intellectual property rights generated under this agreement jointly by our employees and the employees of UMass and/or MassBiologics, as applicable, that do not cover AAV materials.

License Agreement with REGENX

In May 2014, we entered into a license agreement with REGENXBIO Inc., formerly known as ReGenX Biosciences, LLC, or REGENX, for the development and commercialization of gene therapies to treat ALS, Friedreich's ataxia and Huntington's disease. Under this license agreement, REGENX granted us a non-exclusive worldwide license

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to make, have made and use its technology solely for internal research and preclinical development for the identification of specific vectors that could be commercialized. Following identification, we have an option to obtain a non-exclusive worldwide license under the licensed intellectual property to a single specified AAV vector to make, have made, use, import, sell and offer for sale licensed products using the selected vector, which can be exercised for each of ALS, Friedreich's ataxia, or Huntington's disease.

Under the terms of this license agreement, we paid REGENX an upfront fee of $0.5 million, an extension fee of $0.1 million and are required to make an annual maintenance fee in the five digits. If we exercise any or all of the commercial options by a specified date, we will be required to make upfront payments to REGENX of up to $1.5 million and to pay to REGENX an annual maintenance fee payment ranging from five digits to six digits depending on the number of disease indication options exercised. In addition, we will be required to pay to REGENX up to $5.0 million in milestone fees per disease indication, mid- to high-single digit royalty percentages on net sales of licensed products, and low- to mid-single digit percentages of any sublicense fees that we receive from sublicensees for the licensed intellectual property rights.

Our license agreement with REGENX will expire upon the expiration, lapse, abandonment, or invalidation of the last claim of the licensed intellectual property to expire, lapse, or become abandoned or unenforceable in all the countries of the world. The license agreement will automatically terminate if we do not exercise any commercial options within a specified time period after entering into the license agreement, which may be extended. We may terminate the license agreement upon a specified number of days prior written notice. REGENX may terminate the license agreement if we, our affiliates, or sublicensees experience insolvency, if we are more than a specified number of days late in paying money due under the license agreement, or, effective immediately, if we or our affiliates commence any action against REGENX or its licensors to declare or render any claim of the licensed patent rights invalid or unenforceable. Either party may terminate the license agreement for material breach that is not cured within a specified number of days.

 In November 2016, Voyager exercised commercial options for the use of REGENXBIO’s NAV® Technology Platform, or NAV, vectors for the development and commercialization of gene therapies for specific neurological diseases. Upon exercise of the options, REGENXBIO has granted Voyager a non-exclusive worldwide commercial license, with rights to sublicense, to three specific NAV vector sequences covered by REGENXBIO’s NAV Technology Platform, each for the treatment of a specific neurological disease. In return for these rights, REGENXBIO will receive undisclosed upfront payments, ongoing fees, milestone payments and royalties on net sales of products incorporating the licensed intellectual property.

Competition

The biopharmaceutical industry is characterized by intense and dynamic competition to develop new technologies and proprietary therapies. Any product candidates that we successfully develop into products and commercialize may compete with existing therapies and new therapies that may become available in the future. While we believe that our product engine, product programs, product candidates and scientific expertise in the fields of gene therapy and neuroscience provide us with competitive advantages, we face potential competition from various sources, including larger and better-funded pharmaceutical, specialty pharmaceutical and biotechnology companies, as well as from academic institutions, governmental agencies and public and private research institutions.

We are aware of several companies focused on developing gene therapies in various indications, including bluebird bio, Inc., Abeona Therapeutics, Inc., Adverum Biotechnologies, Inc., Agilis Biotherapeutics, LLC, Applied Genetic Technologies Corporation, Asklepios BioPharmaceutical, Inc., Audentes Therapeutics, Inc., AveXis, Inc., Bamboo Therapeutics (now Pfizer Inc., or Pfizer), Dimension Therapeutics, Inc., GenSight Biologics SA, MeiraGTx Ltd., NightstaRx Ltd, REGENXBio Inc., uniQure NV, or uniQure, and Spark Therapeutics, Inc. or Spark, as well as several companies addressing other methods for modifying genes and regulating gene expression. Any advances in gene therapy technology made by a competitor may be used to develop therapies that could compete against any of our product candidates.

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We expect that VY-AADC01 will compete with a variety of therapies currently marketed and in development for advanced Parkinson's disease, including DBS marketed by Medtronic plc, Abbott Laboratories (recently acquired from St Jude Medical), and other medical device companies, DUOPA/Duodopa marketed by AbbVie Inc., as well as other novel, non-oral forms of levodopa in development, including NeuroDerm’s ND0612, Acorda Therapeutic’s CVT-301, and sublingual apomorphine in development at Sunovion Pharmaceuticals (acquired from Cynapsus Therapeutics). Gene therapy competition for advanced Parkinson’s disease previously included AMT-090 or AAV-GDNF, but this was recently deprioritized by uniQure. Oxford Biomedica plc could commence a Phase 1/2 trial in 2017 of OXB-102/Prosavin subject to successfully out-licensing or spinning out the product.

We expect that our preclinical programs will compete with a variety of therapies in development, including:

·

VY-SOD101 for a monogenic form of ALS will potentially compete with IONIS-SOD1Rx being developed by Ionis Pharmaceuticals, Inc., or Ionis, in collaboration with Biogen, and Tirasemtiv being developed by Cytokinetics, Inc., or Cytokinetics;

·

VY-FXN01 for Friedreich's ataxia will potentially compete with AAV-FXN being developed by Adverum Biotechnologies, AAV-FXN being developed by Bamboo Therapeutics (now Pfizer Inc., or Pfizer), and frataxin targeted gene therapy being developed by Agilis Biotherapeutics, LLC in collaboration with Intrexon Corporation and BB-FA being developed by BioBlast Pharma Ltd., or BioBlast;

·

VY-HTT01 for Huntington's disease will potentially compete with IONIS-HTTRx being developed by Ionis in collaboration with F. Hoffmann-La Roche Ltd., or Roche, WVE-120101 being developed by WAVE Life Sciences, a gene editing approach being developed by Sangamo Biosciences, Inc. in collaboration with Shire plc, and gene therapies being developed by uniQure and Spark;

·

VY-TAU01 for FTD/Alzheimer’s disease will potentially compete with Tau antibodies being developed by Roche Genentech Inc. in collaboration with AC Immune SA, Eli Lilly & Co., Bristol-Myers Squibb, AbbVie Inc., Biogen Inc., and several other companies, as well as an antisense oligonucleotide program being developed by Ionis; and

·

VY-NAV01 for severe, chronic pain will potentially compete with Nav1.7 inhibitors being developed by Pfizer, Teva Pharmaceuticals, Biogen Inc., Roche Genentech Inc. in collaboration with Xenon Pharmaceuticals, Amgen, and Astellas Pharma Inc. 

In addition, companies that are currently engaged in gene therapy for non-CNS diseases could at any time decide to develop gene therapies for CNS diseases.

Many of our competitors, either alone or with their strategic partners, have substantially greater financial, technical and human resources than we do and significantly greater experience in the discovery and development of product candidates, obtaining FDA and other regulatory approvals of product candidates and commercializing those product candidates. Accordingly, our competitors may be more successful than us in obtaining approval for product candidates and achieving widespread market acceptance. Our competitors' product candidates may be more effective, or more effectively marketed and sold, than any product candidate we may commercialize and may render our treatments obsolete or non-competitive before we can recover the expenses of developing and commercializing any of our product candidates.

Mergers and acquisitions in the biotechnology and pharmaceutical industries may result in even more resources being concentrated among a smaller number of our competitors. These competitors also compete with us in recruiting and retaining qualified scientific and management personnel and establishing clinical trial sites and subject registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs. Smaller or early-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established companies.

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We anticipate that we will face intense and increasing competition as new product candidates enter the market and advanced technologies become available. We expect any product candidates that we develop and commercialize to compete on the basis of, among other things, efficacy, safety, convenience of administration and delivery, price, and the availability of reimbursement from government and other third-party payers.

Our commercial opportunity could be reduced or eliminated if our competitors develop and commercialize products that are safer, more effective, have fewer or less severe side effects, are more convenient or are less expensive than any products that we may develop. Our competitors also may obtain FDA or other regulatory approval for their product candidates more rapidly than we may obtain approval for ours, which could result in our competitors establishing a strong market position before we are able to enter the market. 

Manufacturing

The manufacture of gene therapy products is technically complex, and necessitates substantial expertise and capital investment. Production difficulties caused by unforeseen events may delay the availability of material for our clinical studies. To meet the requirements of our current and planned future trials we have developed a proprietary manufacturing platform that provides a robust and scalable process for AAV production. We are using the baculovirus AAV production system, a technology for producing AAV vectors at scale in insect-derived cells. The process has been successfully transferred to our contract manufacturing organizations where it is used in manufacturing clinical materials in accordance with the FDA’s current good manufacturing practices, or cGMPs. We are also building an onsite, state-of-the-art process research and development facility to enable the manufacturing of high quality AAV gene therapies.

We presently contract with third parties for the manufacturing of our program materials. We currently have no plans to build our own clinical or commercial scale manufacturing capabilities. The use of contracted manufacturing and reliance on collaboration partners is relatively cost efficient and has eliminated the need for our direct investment in manufacturing facilities and additional staff early in development. Although we rely on contract manufacturers, we have personnel with manufacturing and quality experience to oversee our contract manufacturers.

Intellectual Property

Overview

We strive to protect the proprietary technology, inventions, and to enhance improvements that are commercially important to the development of our business, including seeking, maintaining, and defending patent rights, whether developed internally or licensed from third parties. We also rely on trade secrets and know-how relating to our proprietary technology platform, on continuing technological innovation and on in-licensing opportunities to develop, strengthen and maintain the strength of our position in the field of gene therapy that may be important for the development of our business. We additionally may rely on regulatory protection afforded through data exclusivity, market exclusivity and patent term extensions where available.

Our commercial success may depend in part on our ability to: obtain and maintain patent and other protections for commercially important technology, inventions and know-how related to our business; defend and enforce our patents; preserve the confidentiality of our trade secrets; and operate without infringing the valid enforceable patents and intellectual property rights of third parties. Our ability to stop third parties from making, having made, using, selling, offering to sell or importing our products may depend on the extent to which we have rights under valid and enforceable licenses, patents or trade secrets that cover these activities. In some cases, these rights may need to be enforced by third party licensors. With respect to both licensed and company-owned intellectual property, we cannot be sure that patents will be granted with respect to any of our pending patent applications or with respect to any patent applications filed by us in the future, nor can we be sure that any of our existing patents or any patents that may be granted to us in the future will be commercially useful in protecting our commercial products and methods of manufacturing the same.

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We have 28 patent applications pending in the United States and foreign jurisdictions. At least 14 patent applications have been filed and are pending in the United States and foreign jurisdictions by or on behalf of universities which have granted us exclusive license rights to the technology. To date, 61 patents have issued to our licensors which have granted us exclusive license rights to the technology. To date, 96 patents have issued to our licensors which have granted us non-exclusive license rights to the technology with 38 applications pending. Our policy is to file patent applications to protect technology, inventions and improvements to inventions that are commercially important to the development of our business. We seek United States and international patent protection for a variety of technologies, including: research tools and methods, methods for transferring genetic material into cells, AAV-based biological products, methods of designing novel AAV constructs, methods for treating diseases of interest and methods for manufacturing our AAV-based products. We also intend to seek patent protection or rely upon trade secret rights to protect other technologies that may be used to discover and validate targets and that may be used to identify and develop novel biological products. We seek protection, in part, through confidentiality and proprietary information agreements. We are a party to various other license agreements that give us rights to use specific technologies in our research and development.

Company-Owned Intellectual Property

Parkinson’s Disease (PD)

We own three pending patent families with a total of five patent applications directed to AAV constructs encoding the gene AADC for therapeutic uses. Patents that grant from this patent family are generally expected to start to expire in 2035, subject to possible patent term extensions.

Amyotrophic Lateral Sclerosis (ALS)

We own two pending patent families with a total of two patent applications directed to targeting SOD1 for the treatment of ALS and we have filed a third patent family with one patent application directed to pharmaceutical compositions and methods for the treatment of ALS to protect our intellectual property arising from a funded grant from The Amyotrophic Lateral Sclerosis Association. Patents that grant from these patent families are generally expected to start to expire in 2035, subject to possible patent term extensions.

Friedreich’s Ataxia (FA) and Delivery

We own two pending patent families with the first family having one patent application directed to delivery of AAV gene therapies to the CNS and AAVs encoding frataxin constructs for the treatment of Friedreich's Ataxia and the second family having one patent application directed to the delivery of AAV gene therapies to the CNS. Patents that grant from this patent family are generally expected to start to expire in 2036, subject to possible patent term extensions.

Huntington’s Disease (HD)

We own one pending patent family with one patent application directed to pharmaceutical compositions and methods for targeting HTT for the treatment of HD. Patents from this family are generally expected to start to expire in 2037, subject to possible patent term extensions.

Tauopathies and Antibodies

We own five pending patent families directed to antibodies with a total of nine patent applications. The first patent family has two patent applications directed to assays for the detection of neutralizing antibodies. The other four patent families have a total of seven patent applications directed to vectorized antibodies. Patents from these families are generally expected to start to expire in 2036, subject to possible patent term extensions.

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Neuropathic Pain

We own one pending patent family with one patent application directed to pharmaceutical compositions and methods for the treatment of neuropathic pain. Patents from this family are generally expected to start to expire in 2037, subject to possible patent term extensions.

Regulatable Expression

We own two pending patent families with a total of two patent applications directed to regulatable expression control of AAV transgenes. Patents that grant from this patent family are generally expected to start to expire in 2036, subject to possible patent term extensions.

Vector Engineering and Production

We own four pending patent families directed to AAV production and/or engineering. The first family has two patent applications directed to capsid engineering and domain swapping and AAV production . The second family has one patent application directed to the production of scAAV particles. The last two families have a total of two patent applications directed to the design of AAV drug delivery cassettes. Patents that grant from this patent family are generally expected to start to expire in 2035, subject to possible patent term extensions.

Licensed Intellectual Property

We have obtained exclusive licenses and non-exclusive licenses to patents directed to both compositions of matter and methods of use.

We have licensed six families of patents and patent applications, in the exclusive field of gene therapy for human diseases, directed to RNAi constructs as vector payloads, their design and use in the treatment of CNS disorders from the University of Massachusetts. These families of patents and applications are pending and/or granted in the United States and other territories and comprises 62 granted patents and 12 applications. Patents have been granted in the United States, Canada, Europe, Israel, Japan, Korea and Australia. Nationalization for some members has taken place in Germany, Spain, France, Great Britain, Italy, and Netherlands. Patents that grant from these patent families are generally expected to expire between 2022 and 2025, subject to possible patent term extensions.

We have exclusively licensed three families of patents and patent applications directed to novel AAV capsids from the University of Massachusetts. These families of patents and applications, pending and/or granted in the United States and other territories, and comprises 14 granted patents and 8 applications. Patents have been granted in the United States, Europe and Japan.  Nationalization for some members has taken place in Switzerland, Germany, Denmark, Spain, France, Great Britain, Ireland, Italy, Netherlands, and Sweden. Patents that grant from these patent families are generally expected to expire between 2030 and 2035, subject to possible patent term extensions.

We have non-exclusively licensed a patent family directed to production methods for AAV in insect cells from the NIH, U.S. Department of Health and Human Services. This family of patents is granted in the United States, Canada, Australia and Europe and further nationalized in Germany, France and Great Britain and comprises eight granted patents. Patents that grant from this patent family are generally expected to expire in 2022, subject to possible patent term extensions.

We have non-exclusively licensed two families of patents and patent applications directed to novel AAV capsids from the Board of Trustees of the Leland Stanford Junior University. These families of patents and applications, pending and/or granted in the United States, comprise 6 granted patents and 3 applications. Patents that grant from these patent families are generally expected to expire between 2027 and 2032, subject to possible patent term extensions.

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We have non-exclusively licensed two families of patents and patent applications directed to AAV capsids from REGENXBIO® Inc. These families of patents and patent applications are pending and/or granted in the United States and other territories and comprises 66 granted patents and 22 applications. Patents have been granted in Australia, Brazil, Canada, China, Europe, Hong Kong, Israel, India, Japan, Korea, Mexico, New Zealand, Philippines, Singapore, and the United States. Patents that grant from these patent families are generally expected to expire between 2022 and 2024, subject to possible patent term extensions.

We have non-exclusively licensed three families of patent applications directed to AAV capsids from the California Institute of Technology. These families are pending in the United States and have been filed Internationally. Patents that grant from these patent families are generally expected to start to expire in 2034, subject to possible patent term extensions.

Trademark Protection

We have filed and obtained trademark protection for the VOYAGER THERAPEUTICS character mark for pharmaceutical research and development in the field of gene therapy. The mark is listed on the Principal Register, Registration No. 4545283.

We have filed and obtained trademark protection for the VOYAGER THERAPEUTICS service mark logo for pharmaceutical research and development in the field of gene therapy. The mark is listed on the Principal Register, Registration No. 4621083.

We plan to register trademarks in connection with our biological products.

In addition to the above, we have established expertise and development capabilities focused in the areas of preclinical research and development, manufacturing and manufacturing process scale-up, quality control, quality assurance, regulatory affairs and clinical trial design and implementation. We believe that our focus and expertise will help us develop products based on our proprietary intellectual property.

Trade Secret Protection

Finally, we may rely, in some circumstances, on trade secrets to protect our technology. We seek to protect our proprietary technology and processes, in part, by entering into confidentiality agreements with our employees, consultants, scientific advisors and contractors. We also seek to preserve the integrity and confidentiality of our data and trade secrets by maintaining physical security of our premises and physical and electronic security of our information technology systems. While we have confidence in these individuals, organizations and systems, agreements or security measures may be breached, and we may not have adequate remedies for any breach. In addition, our trade secrets may otherwise become known or be independently discovered by competitors. To the extent that our consultants, contractors or collaborators use intellectual property owned by others in their work for us, disputes may arise as to the rights in related or resulting know-how and inventions.

To the extent that the valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. 

Government Regulation

Biological products, including gene therapy products, are subject to regulation under the Federal Food, Drug, and Cosmetic Act, or FD&C Act, and the Public Health Service Act, or PHS Act, and other federal, state, local and foreign statutes and regulations. Both the FD&C Act and the PHS Act and their corresponding regulations govern, among other things, the testing, manufacturing, safety, purity, potency, efficacy, labeling, packaging, storage, record keeping,

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distribution, import, export, reporting, advertising and other promotional practices involving biological products. FDA approval must be obtained before clinical testing of biological products, and each clinical study protocol for a gene therapy product is reviewed by the FDA and, in some instances, the NIH, through its RAC. FDA approval also must be obtained before marketing of biological products. The process of obtaining regulatory approvals and the subsequent compliance with appropriate federal, state, local and foreign statutes and regulations require the expenditure of substantial time and financial resources and we may not be able to obtain the required regulatory approvals.

Within the FDA, the Center for Biologics Evaluation and Research, or CBER, regulates gene therapy products. Within CBER, the Office of Tissues and Advanced Therapies (OTAT) is responsible for gene therapy review and evaluation. CBER works closely with the NIH and its RAC, which makes recommendations to the NIH on gene therapy issues and engages in a public discussion of scientific, safety, ethical and societal issues related to proposed and ongoing gene therapy protocols. The FDA and the NIH have published guidance documents with respect to the development and submission of gene therapy protocols. The FDA also has published guidance documents related to, among other things, gene therapy products in general, their preclinical assessment, observing subjects involved in gene therapy studies for delayed adverse events, viral shedding, environmental assessments, potency testing, and chemistry, manufacturing and control information in gene therapy INDs. FDA guidance documents provide the agency's current thinking about a particular subject, but are not legally binding.

U.S. Biological Products Development Process

The process required by the FDA before a biological product may be marketed in the United States generally involves the following:

·

completion of nonclinical laboratory tests and animal studies according to good laboratory practice, or GLPs, and applicable requirements for the humane use of laboratory animals or other applicable regulations;

·

submission to the FDA of an application for an IND, which must become effective before human clinical trials may begin;

·

performance of adequate and well-controlled human clinical trials according to the FDA's regulations commonly referred to as good clinical practice, or GCPs, and any additional requirements for the protection of human research subjects and their health information, to establish the safety, purity and potency, or efficacy, of the proposed biological product for its intended use;

·

submission to the FDA of a Biologics License Application, or BLA, for marketing approval that includes substantive evidence of safety, purity, and potency from results of nonclinical testing and clinical trials;

·

satisfactory completion of an FDA inspection of the manufacturing facility or facilities where the biological product is produced to assess compliance with cGMP, to assure that the facilities, methods and controls are adequate to preserve the biological product's identity, strength, quality and purity;

·

potential FDA audit of the nonclinical and clinical study sites that generated the data in support of the BLA; and

·

FDA review and approval, or licensure, of the BLA.

Before testing any biological product candidate, including a gene therapy product, in humans, the product candidate enters the preclinical testing stage. Preclinical tests, also referred to as nonclinical tests, include laboratory evaluations of product chemistry, toxicity and formulation, as well as animal studies to assess the potential safety and activity of the product candidate. The conduct of the preclinical tests must comply with federal regulations and requirements including GLPs.

Where a gene therapy study is conducted at, or sponsored by, institutions receiving NIH funding for recombinant DNA research, prior to the submission of an IND to the FDA, a protocol and related documentation is submitted to and the study is registered with the NIH Office of Biotechnology Activities, or OBA, pursuant to the NIH

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Guidelines for Research Involving Recombinant DNA Molecules, or NIH Guidelines. Compliance with the NIH Guidelines is mandatory for investigators at institutions receiving NIH funds for research involving recombinant DNA, however many companies and other institutions not otherwise subject to the NIH Guidelines voluntarily follow them. The NIH is responsible for convening the RAC, a federal advisory committee, that discusses protocols that raise novel or particularly important scientific, safety or ethical considerations at one of its quarterly public meetings. The OBA will notify the FDA of the RAC's decision regarding the necessity for full public review of a gene therapy protocol. RAC proceedings and reports are posted to the OBA website and may be accessed by the public. Recent changes in the procedures for the RAC process issued by the NIH now include evaluation and assessment by IRBs and may result in some delay before initiation of a clinical trial. 

The clinical study sponsor must submit the results of the preclinical tests, together with manufacturing information, analytical data, any available clinical data or literature and a proposed clinical protocol, to the FDA as part of the IND. Some preclinical testing typically continues after the IND is submitted. The IND automatically becomes effective 30 days after receipt by the FDA, unless the FDA places the clinical study on a clinical hold within that 30-day time period. In such a case, the IND sponsor and the FDA must resolve any outstanding concerns before the clinical study can begin. With gene therapy protocols, if the FDA allows the IND to proceed, but the RAC decides that full public review of the protocol is warranted, the FDA will request at the completion of its IND review that sponsors delay initiation of the protocol until after completion of the RAC review process. The FDA may also impose clinical holds on a biological product candidate at any time before or during clinical trials due to safety concerns or non-compliance. If the FDA imposes a clinical hold, studies may not recommence without FDA authorization and then only under terms authorized by the FDA. Accordingly, we cannot be sure that submission of an IND will result in the FDA allowing clinical trials to begin, or that, once begun, issues will not arise that suspend or terminate such studies.

Clinical trials involve the administration of the biological product candidate to healthy volunteers or patients under the supervision of qualified investigators, generally physicians not employed by or under the study sponsor's control. Clinical trials are conducted under protocols detailing, among other things, the objectives of the clinical study, dosing procedures, subject selection and exclusion criteria, and the parameters to be used to monitor subject safety, including stopping rules that assure a clinical study will be stopped if certain adverse events should occur. Each protocol and any amendments to the protocol must be submitted to the FDA as part of the IND. Clinical trials must be conducted and monitored in accordance with the FDA's regulations comprising the GCP requirements, including the requirement that all research subjects provide informed consent. Further, each clinical study must be reviewed and approved by an independent institutional review board, or IRB, at or servicing each institution at which the clinical study will be conducted. An IRB is charged with protecting the welfare and rights of study participants and considers such items as whether the risks to individuals participating in the clinical trials are minimized and are reasonable in relation to anticipated benefits. The IRB also approves the form and content of the informed consent that must be signed by each clinical study subject or his or her legal representative and must monitor the clinical study until completed. Clinical trials involving recombinant or synthetic (or both) nucleic acid molecules performed at or sponsored by an institution that receives any NIH funding for such research also must be reviewed by an institutional biosafety committee, or IBC, a local institutional committee that reviews and oversees basic and clinical research conducted at that institution. The IBC assesses the safety of the research and identifies any potential risk to public health or the environment.

Human clinical trials are typically conducted in three sequential phases that may overlap or be combined:

·

Phase 1.  The biological product is initially introduced into healthy human subjects and tested for safety. In the case of some products for severe or life-threatening diseases, especially when the product may be too inherently toxic to ethically administer to healthy volunteers, the initial human testing is often conducted in patients.  Guidelines on clinical trials with gene therapy products issued by OTAT state that the FDA has determined that the benefit-risk ratio of these products does not warrant their evaluation in healthy human subjects.

·

Phase 2.  The biological product is evaluated in a limited patient population to identify possible adverse effects and safety risks, to preliminarily evaluate the efficacy of the product for specific targeted diseases and to determine dosage tolerance, optimal dosage and dosing schedule.

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·

Phase 3.  Clinical trials are undertaken to further evaluate dosage, clinical efficacy, potency and safety in an expanded patient population at geographically dispersed clinical trial sites. These clinical trials are intended to establish the overall risk/benefit ratio of the product and provide an adequate basis for product labeling.

Post-approval clinical trials, sometimes referred to as Phase 4 clinical trials, may be conducted after initial marketing approval. These clinical trials are used to gain additional experience from the treatment of patients in the intended therapeutic indication, particularly for long-term safety follow-up. The FDA recommends that sponsors observe subjects for potential gene therapy-related delayed adverse events for a 15-year period, including a minimum of five years of annual examinations followed by ten years of annual queries, either in person or by questionnaire, of trial subjects.

During all phases of clinical development, regulatory agencies require extensive monitoring and auditing of all clinical activities, clinical data, and clinical trial investigators. Annual progress reports detailing the results of the clinical trials must be submitted to the FDA. Written IND safety reports must be promptly submitted to the FDA, the NIH and the investigators for serious and unexpected adverse events, any findings from other studies, tests in laboratory animals or in vitro testing that suggest a significant risk for human subjects, or any clinically important increase in the rate of a serious suspected adverse reaction over that listed in the protocol or investigator brochure. The sponsor must submit an IND safety report within 15 calendar days after the sponsor determines that the information qualifies for reporting. The sponsor also must notify the FDA of any unexpected fatal or life-threatening suspected adverse reaction within seven calendar days after the sponsor's initial receipt of the information. Phase 1, Phase 2 and Phase 3 clinical trials may not be completed successfully within any specified period, if at all. The FDA or the sponsor or its data safety monitoring board may suspend a clinical trial at any time on various grounds, including a finding that the research subjects or patients are being exposed to an unacceptable health risk. Similarly, an IRB can suspend or terminate approval of a clinical trial at its institution if the clinical trial is not being conducted in accordance with the IRB's requirements or if the biological product has been associated with unexpected serious harm to patients.

Human gene therapy products are a new category of therapeutics. Because this is a relatively new and expanding area of novel therapeutic interventions, there can be no assurance as to the length of the study period, the number of patients the FDA will require to be enrolled in the studies in order to establish the safety, efficacy, purity and potency of human gene therapy products, or that the data generated in these studies will be acceptable to the FDA to support marketing approval. The NIH and the FDA have a publicly accessible database, the Genetic Modification Clinical Research Information System which includes information on gene transfer studies and serves as an electronic tool to facilitate the reporting and analysis of adverse events on these studies.

Concurrent with clinical trials, companies usually complete additional animal studies and must also develop additional information about the physical characteristics of the biological product as well as finalize a process for manufacturing the product in commercial quantities in accordance with cGMP requirements. To help reduce the risk of the introduction of adventitious agents with use of biological products, the PHS Act emphasizes the importance of manufacturing control for products whose attributes cannot be precisely defined. The manufacturing process must be capable of consistently producing quality batches of the product candidate and, among other things, the sponsor must develop methods for testing the identity, strength, quality, potency and purity of the final biological product. Additionally, appropriate packaging must be selected and tested and stability studies must be conducted to demonstrate that the biological product candidate does not undergo unacceptable deterioration over its shelf life.

U.S. Review and Approval Processes

After the completion of clinical trials of a biological product, FDA approval of a BLA, must be obtained before commercial marketing of the biological product. The BLA must include results of product development, laboratory and animal studies, human studies, information on the manufacture and composition of the product, proposed labeling and other relevant information. In addition, under the Pediatric Research Equity Act, or PREA, a BLA or supplement to a BLA must contain data to assess the safety and effectiveness of the biological product for the claimed indications in all relevant pediatric subpopulations and to support dosing and administration for each pediatric subpopulation for which

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the product is safe and effective. The FDA may grant deferrals for submission of data or full or partial waivers. Unless otherwise required by regulation, PREA does not apply to any biological product for an indication for which orphan designation has been granted. The testing and approval processes require substantial time and effort and there can be no assurance that the FDA will accept the BLA for filing and, even if filed, that any approval will be granted on a timely basis, if at all.

Under the Prescription Drug User Fee Act, or PDUFA, as amended, each BLA must be accompanied by a user fee. The FDA adjusts the PDUFA user fees on an annual basis. PDUFA also imposes an annual product fee for biologics and an annual establishment fee on facilities used to manufacture prescription biologics. Fee waivers or reductions are available in certain circumstances, including a waiver of the application fee for the first application filed by a small business. Additionally, no user fees are assessed on BLAs for products designated as orphan drugs, unless the product also includes a non-orphan indication.

Within 60 days following submission of the application, the FDA reviews a BLA submitted to determine if it is substantially complete before the agency accepts it for filing. The FDA may refuse to file any BLA that it deems incomplete or not properly reviewable at the time of submission and may request additional information. In this event, the BLA must be resubmitted with the additional information. The resubmitted application also is subject to review before the FDA accepts it for filing. The application also needs to be published and submitted in an electronic format that can be processed through the FDA’s electronic systems. If the electronic submission is not compatible with FDA’s systems, the BLA can be refused to file. Once the submission is accepted for filing, the FDA begins an in-depth substantive review of the BLA. The FDA reviews the BLA to determine, among other things, whether the proposed product is safe and potent, or effective, for its intended use, and has an acceptable purity profile, and whether the product is being manufactured in accordance with cGMP to assure and preserve the product's identity, safety, strength, quality, potency and purity. The FDA may refer applications for novel biological products or biological products that present difficult questions of safety or efficacy to an advisory committee, typically a panel that includes clinicians and other experts, for review, evaluation and a recommendation as to whether the application should be approved and under what conditions. The FDA is not bound by the recommendations of an advisory committee, but it considers such recommendations carefully when making decisions. During the biological product approval process, the FDA also will determine whether a Risk Evaluation and Mitigation Strategy, or REMS, is necessary to assure the safe use of the biological product. If the FDA concludes a REMS is needed, the sponsor of the BLA must submit a proposed REMS; the FDA will not approve the BLA without a REMS, if required.

Before approving a BLA, the FDA will inspect the facilities at which the product is manufactured. The FDA will not approve the product unless it determines that the manufacturing processes and facilities are in compliance with cGMP requirements and adequate to assure consistent production of the product within required specifications. Additionally, before approving a BLA, the FDA will typically inspect one or more clinical trial sites to assure that the clinical trials were conducted in compliance with IND study requirements and GCP requirements. To assure cGMP and GCP compliance, an applicant must incur significant expenditure of time, money and effort in the areas of training, record keeping, production, and quality control.

Notwithstanding the submission of relevant data and information, the FDA may ultimately decide that the BLA does not satisfy its regulatory criteria for approval and deny approval. Data obtained from clinical trials are not always conclusive and the FDA may interpret data differently than we interpret the same data. If the agency decides not to approve the BLA in its present form, the FDA will issue a complete response letter that usually describes all of the specific deficiencies in the BLA identified by the FDA. The deficiencies identified may be minor, for example, requiring labeling changes, or major, for example, requiring additional clinical trials. Additionally, the complete response letter may include recommended actions that the applicant might take to place the application in a condition for approval. If a complete response letter is issued, the applicant may either resubmit the BLA, addressing all of the deficiencies identified in the letter, or withdraw the application.

If a product receives regulatory approval, the approval may be significantly limited to specific diseases and dosages or the indications for use may otherwise be limited, which could restrict the commercial value of the product. Further, the FDA may require that certain contraindications, warnings or precautions be included in the product labeling.

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The FDA may impose restrictions and conditions on product distribution, prescribing, or dispensing in the form of a risk management plan, or otherwise limit the scope of any approval. In addition, the FDA may require post marketing clinical trials, sometimes referred to as Phase 4 clinical trials, designed to further assess a biological product's safety and effectiveness, and testing and surveillance programs to monitor the safety of approved products that have been commercialized.

One of the performance goals agreed to by the FDA under the PDUFA is to review standard BLAs in 10 months from filing and priority BLAs in six months from filing, whereupon a review decision is to be made. The FDA does not always meet its PDUFA goal dates for standard and priority BLAs and its review goals are subject to change from time to time. The review process and the PDUFA goal date may be extended by three months if the FDA requests or the BLA sponsor otherwise provides additional information or clarification regarding information already provided in the submission within the last three months before the PDUFA goal date.

Post-Approval Requirements

Maintaining substantial compliance with applicable federal, state, and local statutes and regulations requires the expenditure of substantial time and financial resources. Rigorous and extensive FDA regulation of biological products continues after approval, particularly with respect to cGMP. We will rely, and expect to continue to rely, on third parties for the production of clinical and commercial quantities of any products that we may commercialize. Manufacturers of our products are required to comply with applicable requirements in the cGMP regulations, including quality control and quality assurance and maintenance of records and documentation. Other post-approval requirements applicable to biological products, include reporting of cGMP deviations that may affect the identity, potency, purity and overall safety of a distributed product, record-keeping requirements, reporting of adverse effects, reporting updated safety and efficacy information, and complying with electronic record and signature requirements. After a BLA is approved, the product also may be subject to official lot release. As part of the manufacturing process, the manufacturer is required to perform certain tests on each lot of the product before it is released for distribution. If the product is subject to official release by the FDA, the manufacturer submits samples of each lot of product to the FDA together with a release protocol showing a summary of the history of manufacture of the lot and the results of all of the manufacturer's tests performed on the lot. The FDA also may perform certain confirmatory tests on lots of some products, such as viral vaccines, before releasing the lots for distribution by the manufacturer. In addition, the FDA conducts laboratory research related to the regulatory standards on the safety, purity, potency, and effectiveness of biological products. Systems need to be put in place to record and evaluate adverse events reported by health care providers and patients and to assess product complaints. An increase in severity or new adverse events can result in labeling changes or product recall. Defects in manufacturing of commercial products can result in product recalls. 

We also must comply with the FDA's advertising and promotion requirements, such as those related to direct-to-consumer advertising, the prohibition on promoting products for uses or in patient populations that are not described in the product's approved labeling (known as "off-label use"), industry-sponsored scientific and educational activities, and promotional activities involving the internet. Discovery of previously unknown problems or the failure to comply with the applicable regulatory requirements may result in restrictions on the marketing of a product or withdrawal of the product from the market as well as possible civil or criminal sanctions. Failure to comply with the applicable U.S. requirements at any time during the product development process, approval process or after approval, may subject an applicant or manufacturer to administrative or judicial civil or criminal sanctions and adverse publicity. FDA sanctions could include refusal to approve pending applications, withdrawal of an approval or license revocation, clinical hold, warning or untitled letters, product recalls, product seizures, total or partial suspension of production or distribution, injunctions, fines, refusals of government contracts, mandated corrective advertising or communications with doctors, debarment, restitution, disgorgement of profits, or civil or criminal penalties. Any agency or judicial enforcement action could have a material adverse effect on us.

Biological product manufacturers and other entities involved in the manufacture and distribution of approved biological products are required to register their establishments with the FDA and certain state agencies, and are subject to periodic unannounced inspections by the FDA and certain state agencies for compliance with cGMPs and other laws.

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Accordingly, manufacturers must continue to expend time, money, and effort in the area of production and quality control to maintain cGMP compliance. Discovery of problems with a product after approval may result in restrictions on a product, manufacturer, or holder of an approved BLA, including withdrawal of the product from the market. In addition, changes to the manufacturing process or facility generally require prior FDA approval before being implemented and other types of changes to the approved product, such as adding new indications and additional labeling claims, are also subject to further FDA review and approval.

Orphan Drug Designation

Under the Orphan Drug Act, the FDA may grant orphan designation to a drug or biological product intended to treat a rare disease or condition, which is generally a disease or condition that affects fewer than 200,000 individuals in the United States, or more than 200,000 individuals in the United States and for which there is no reasonable expectation that the cost of developing and making a drug or biological product available in the United States for this type of disease or condition will be recovered from sales of the product. Orphan product designation must be requested before submitting a BLA. After the FDA grants orphan product designation, the identity of the therapeutic agent and its potential orphan use are disclosed publicly by the FDA. Orphan product designation does not convey any advantage in or shorten the duration of the regulatory review and approval process.

If a product that has orphan designation subsequently receives the first FDA approval for the disease or condition for which it has such designation, the product is entitled to orphan product exclusivity, which means that the FDA may not approve any other applications to market the same biological product for the same indication for seven years, except in limited circumstances, such as a showing of clinical superiority to the product with orphan exclusivity. Competitors, however, may receive approval of different products for the indication for which the orphan product has exclusivity or obtain approval for the same product but for a different indication for which the orphan product has exclusivity. Orphan product exclusivity also could block the approval of one of our products for seven years if a competitor obtains approval of the same biological product as defined by the FDA or if our product candidate is determined to be contained within the competitor's product for the same indication or disease. If a biological product designated as an orphan product receives marketing approval for an indication broader than what is designated, it may not be entitled to orphan product exclusivity.

Special FDA Expedited Review and Approval Programs

The FDA has various programs, including fast track designation, priority review, accelerated approval, and breakthrough therapy designation, that are intended to expedite or simplify the process for the development and FDA review of biological products that are intended for the treatment of serious or life threatening diseases or conditions and demonstrate the potential to address unmet medical needs. The purpose of these programs is to provide important new biological products to patients earlier than under standard FDA review procedures. To be eligible for a fast track designation, the FDA must determine, based on the request of a sponsor, that a biological product is intended to treat a serious or life threatening disease or condition and demonstrates the potential to address an unmet medical need. The FDA will determine that a product will fill an unmet medical need if it will provide a therapy where none exists or provide a therapy that may be potentially superior to existing therapy based on efficacy or safety factors.

The FDA may give a priority review designation to biological products that treats a serious condition and, if approved, would provide a significant improvement in safety or effectiveness. A priority review means that the goal for the FDA to review an application is six months, rather than the standard review of ten months under current PDUFA guidelines. Most products that are eligible for fast track designation are also likely to be considered appropriate to receive a priority review.

In addition, biological products studied for their safety and effectiveness in treating serious or life-threatening illnesses and that provide meaningful therapeutic benefit over existing treatments may receive accelerated approval and may be approved on the basis of adequate and well-controlled clinical trials establishing that the biological product has an effect on a surrogate endpoint that is reasonably likely to predict clinical benefit, or on a clinical endpoint that can be measured earlier than irreversible morbidity or mortality, that is reasonably likely to predict an effect on irreversible

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morbidity or mortality or other clinical benefit, taking into account the severity, rarity or prevalence of the condition and the availability or lack of alternative treatments. As a condition of approval, the FDA may require a sponsor of a biological product receiving accelerated approval to perform post-marketing studies to verify and describe the predicted effect on irreversible morbidity or mortality or other clinical endpoint, and the biological product may be subject to accelerated withdrawal procedures.

Moreover, under the Food and Drug Administration Safety and Innovation Act, or FDASIA, enacted in 2012, a sponsor can request designation of a product candidate as a "breakthrough therapy." A breakthrough therapy is defined as a biological product that is intended, alone or in combination with one or more other drugs, to treat a serious or life-threatening disease or condition, and preliminary clinical evidence indicates that the biological product may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. Biological products designated as breakthrough therapies are also eligible for accelerated approval. The FDA must take certain actions, such as holding timely meetings and providing advice, intended to expedite the development and review of an application for approval of a breakthrough therapy.

Even if a product qualifies for one or more of these programs, the FDA may later decide that the product no longer meets the conditions for qualification or decide that the time period for FDA review or approval will not be shortened. Furthermore, fast track designation, priority review, accelerated approval and breakthrough therapy designation, do not change the standards for approval and may not ultimately expedite the development or approval process.

Accelerated approval for regenerative advanced therapies

As part of the 21st Century Cures Act, Congress recently amended the FD&C Act to create an accelerated approval program for regenerative advanced therapies, which include cell therapies, therapeutic tissue engineering products, human cell and tissue products, and combination products using any such therapies or products. At this time, the FDA has not made a determination of what gene therapy products if any, may qualify as a regenerative advanced therapy based on this definition. Regenerative advanced therapies do not include those human cells, tissues, and cellular and tissue based products regulated solely under section 361 of the Public Health Service Act and 21 CFR Part 1271. The new program is intended to facilitate efficient development and expedite review of regenerative advanced therapies, which are intended to treat, modify, reverse, or cure a serious or life-threatening disease or condition. A drug sponsor may request that FDA designate a drug as a regenerative advanced therapy concurrently with or at any time after submission of an IND. FDA has 60 calendar days to determine whether the drug meets the criteria, including whether there is preliminary clinical evidence indicating that the drug has the potential to address unmet medical needs for a serious or life-threatening disease or condition. A new drug application or BLA for a regenerative advanced therapy may be eligible for priority review or accelerated approval through (1) surrogate or intermediate endpoints reasonably likely to predict long-term clinical benefit or (2) reliance upon data obtained from a meaningful number of sites. Benefits of such designation also include early interactions with FDA to discuss any potential surrogate or intermediate endpoint to be used to support accelerated approval. A regenerative advanced therapy that is granted accelerated approval and is subject to post-approval requirements may fulfill such requirements through the submission of clinical evidence, clinical studies, patient registries, or other sources of real world evidence, such as electronic health records; the collection of larger confirmatory data sets; or post-approval monitoring of all patients treated with such therapy prior to its approval.

U.S. Patent Term Restoration and Marketing Exclusivity

Depending upon the timing, duration and specifics of the FDA approval of the use of our product candidates, some of our U.S. patents may be eligible for limited patent term extension under the Drug Price Competition and Patent Term Restoration Act of 1984, commonly referred to as the Hatch-Waxman Amendments. The Hatch-Waxman Amendments permit a patent restoration term of up to five years as compensation for patent term lost during product development and the FDA regulatory review process. However, patent term restoration cannot extend the remaining term of a patent beyond a total of 14 years from the product's approval date. The patent term restoration period is generally one-half the time between the effective date of an IND and the submission date of a BLA plus the time between the submission date of a BLA and the approval of that application, less any time the applicant failed to act with due diligence. Only one

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patent applicable to an approved biological product is eligible for the extension and the application for the extension must be submitted prior to the expiration of the patent. The U.S. Patent and Trademark Office, in consultation with the FDA, reviews and approves the application for any patent term extension or restoration. In the future, we may intend to apply for restoration of patent term for one of our currently owned or licensed patents to add patent life beyond its current expiration date, depending on the expected length of the clinical trials and other factors involved in the filing of the relevant BLA.

A biological product can obtain pediatric market exclusivity in the United States. Pediatric exclusivity, if granted, adds six months to existing exclusivity periods and patent terms. This six-month exclusivity, which runs from the end of other exclusivity protection or patent term, may be granted based on the voluntary completion of a pediatric study in accordance with an FDA-issued "Written Request" for such a study.

The Patient Protection and Affordable Care Act, or Affordable Care Act, signed into law on March 23, 2010, includes a subtitle called the Biologics Price Competition and Innovation Act of 2009 which created an abbreviated approval pathway for biological products shown to be biosimilar to, or interchangeable with, an FDA-licensed reference biological product. This amendment to the PHS Act attempts to minimize duplicative testing. Biosimilarity, which requires that there be no clinically meaningful differences between the biological product and the reference product in terms of safety, purity, and potency, can be shown through analytical studies, animal studies, and a clinical trial or trials, including clinical pharmacology trials and assessment of immunogenicity. Interchangeability requires that a product is biosimilar to the reference product and the product must demonstrate that it can be expected to produce the same clinical results as the reference product and, for products administered multiple times, the biologic and the reference biologic may be switched after one has been previously administered without increasing safety risks or risks of diminished efficacy relative to exclusive use of the reference biologic.

A reference biologic is granted twelve years of exclusivity from the time of first licensure of the reference product. The first biologic product submitted under the abbreviated approval pathway that is determined to be interchangeable with the reference product has exclusivity against other biologics submitting under the abbreviated approval pathway for the lesser of (i) one year after the first commercial marketing, (ii) 18 months after approval if there is no legal challenge, (iii) 18 months after the resolution in the applicant's favor of a lawsuit challenging the biologics' patents if an application has been submitted or (iv) 42 months after the application has been approved if a lawsuit is ongoing within the 42-month period.

Other Healthcare Laws

Although we currently do not have any products on the market, we may be subject to additional healthcare regulation and enforcement by the federal government and by authorities in the states in which we conduct our business. Such laws include, without limitation, state and federal anti-kickback, fraud and abuse, false claims, privacy and security and physician sunshine laws and regulations, many of which may become more applicable to us if our product candidates are approved and we begin commercialization. If our operations are found to be in violation of any of such laws or any other governmental regulations that apply to us, we may be subject to penalties, including, without limitation, administrative, civil and criminal penalties, damages, fines, disgorgement, the curtailment or restructuring of our operations, exclusion from participation in federal and state healthcare programs and imprisonment, any of which could adversely affect our ability to operate our business and our financial results.

In addition, the Affordable Care Act is intended to broaden access to health insurance, reduce or constrain the growth of healthcare spending, enhance remedies against fraud and abuse, add transparency requirements for the healthcare and health insurance industries, impose taxes and fees on the health industry and impose additional health policy reforms. With regard to biopharmaceutical products, in addition to the Biologics Price Competition and Innovation Act of 2009 included in the Affordable Care Act, among other things, the Affordable Care Act expanded and increased industry rebates for drugs covered under Medicaid programs and made changes to the coverage requirements under the Medicare prescription drug benefit. Some of the provisions of the Affordable Care Act have yet to be fully implemented, while certain provisions have been subject to judicial and Congressional challenges. In January 2017,

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Congress voted to adopt a budget resolution for fiscal year 2017, that while not a law, is widely viewed as the first step toward the passage of legislation that would repeal certain aspects of the Affordable Care Act. Further, on January 20, 2017, President Trump signed an Executive Order directing federal agencies with authorities and responsibilities under the Affordable Care Act to waive, defer, grant exemptions from, or delay the implementation of any provision of the Affordable Care Act that would impose a fiscal burden on states or a cost, fee, tax, penalty or regulatory burden on individuals, healthcare providers, health insurers, or manufacturers of pharmaceuticals or medical devices. Congress also could consider subsequent legislation to replace elements of the Affordable Care Act that are repealed. In the coming years, additional legislative and regulatory changes could be made to governmental health programs that could significantly impact the biopharmaceutical industry and the success of our product candidates. The Affordable Care Act, as well as other federal, state and foreign healthcare reform measures that have been and may be adopted in the future, could harm our future revenues.

Additional Regulation

In addition to the foregoing, state and federal laws regarding environmental protection and hazardous substances, including the Occupational Safety and Health Act, the Resource Conservancy and Recovery Act and the Toxic Substances Control Act, affect our business. These and other laws govern our use, handling and disposal of various biological, chemical and radioactive substances used in, and wastes generated by, our operations. If our operations result in contamination of the environment or expose individuals to hazardous substances, we could be liable for damages and governmental fines. We believe that we are in material compliance with applicable environmental laws and that continued compliance therewith will not have a material adverse effect on our business. We cannot predict, however, how changes in these laws may affect our future operations.

U.S. Foreign Corrupt Practices Act

The U.S. Foreign Corrupt Practices Act, to which we are subject, prohibits corporations and individuals from engaging in certain activities to obtain or retain business or to influence a person working in an official capacity. It is illegal to pay, offer to pay or authorize the payment of anything of value to any foreign government official, government staff member, political party or political candidate in an attempt to obtain or retain business or to otherwise influence a person working in an official capacity.

Government Regulation Outside of the United States

In addition to regulations in the United States, we will be subject to a variety of regulations in other jurisdictions governing, among other things, clinical trials and any commercial sales and distribution of our products. Because biologically sourced raw materials are subject to unique contamination risks, their use may be restricted in some countries.

Whether or not we obtain FDA approval for a product, we must obtain the requisite approvals from regulatory authorities in foreign countries prior to the commencement of clinical trials or marketing of the product in those countries. Certain countries outside of the United States have a similar process that requires the submission of a clinical trial application much like the IND prior to the commencement of human clinical trials.

If we fail to comply with applicable foreign regulatory requirements, we may be subject to, among other things, fines, suspension or withdrawal of regulatory approvals, product recalls, seizure of products, operating restrictions and criminal prosecution.

Coverage, Pricing and Reimbursement for Biopharmaceutical Products

Sales of our products, when and if approved for marketing, will depend, in part, on the extent to which our products will be covered by third-party payors, such as federal, state, and foreign government health care programs, commercial insurance and managed healthcare organizations. These third-party payors are increasingly reducing reimbursements for

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medical products, drugs and services. In addition, the U.S. government, state legislatures and foreign governments have continued implementing cost containment programs, including price controls, restrictions on coverage and reimbursement and requirements for substitution of generic products. Adoption of price controls and cost containment measures, and adoption of more restrictive policies in jurisdictions with existing controls and measures, could further limit our net revenue and results. Decreases in third-party reimbursement for our product candidates or a decision by a third-party payor not to cover our product candidates could reduce physician usage of our products once approved and have a material adverse effect on our sales, results of operations and financial condition.

Incorporation and Initial Public Offering

We were incorporated under the laws of Delaware on June 2013. On November 16, 2015, we closed our Initial Public Offering, or IPO, whereby we sold 5,750,000 shares of common stock at a public offering price of $14.00 per share, including 750,000 shares of common stock issued upon the full exercise by the underwriters of their option to purchase additional shares, resulting in net proceeds to us of $72.9 million after deducting underwriting discounts, commissions, and offering expenses payable by us.

Employees

As of December 31, 2016, we employed 77 full-time employees in the United States, including 58 in research and development and 20 in general and administrative. We have one part-time employee. Thirty-one of our employees have either an M.D. or a Ph.D. We have never had a work stoppage, and none of our employees is represented by a labor organization or under any collective-bargaining arrangements. We consider our employee relations to be good.

Facilities

We lease our office and laboratory space, which consists of approximately 19,000 square feet located in Cambridge, Massachusetts. Our lease expires in 2019. In January 2016, we signed an agreement to lease an additional facility of approximately 26,000 square feet in Cambridge, Massachusetts, to support our continued growth. The additional facility will include laboratory and office space, and was ready for occupancy in early 2017. We believe our current office and laboratory space, combined with the new lease, is sufficient to meet our needs until the expiration of our leases.

Legal Proceedings

As of the date of this Annual Report on Form 10-K, we were not party to any legal matters or claims. In the future, we may become party to legal matters and claims arising in the ordinary course of business, the resolution of which we do not anticipate would have a material adverse impact on our financial position, results of operations or cash flows.

Available Information

Our Internet address is http://www.voyagertherapeutics.com. We make available, free of charge, on or through our website our annual reports on Form 10-k, quarterly reports on Form 10-Q, current reports on Form 8-K, proxy statements and any amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities and Exchange Act as soon as reasonably practicable after such material is electronically filed with or furnished to the Securities and Exchange Commission. The information on our website is not part of this Annual Report for the year ended December 31, 2016.

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ITEM 1A.   RISK FACTORS

An investment in shares of our common stock involves a high degree of risk. You should carefully consider the following information about these risks, together with the other information appearing elsewhere in this Annual Report on Form 10-K, including our financial statements and related notes hereto, before deciding to invest in our common stock. The occurrence of any of the following risks could have a material adverse effect on our business, financial condition, results of operations and future growth prospects. In these circumstances, the market price of our common stock could decline, and you may lose all or part of your investment.

Risks Related to Our Financial Position and Need for Capital

We have incurred net losses since inception and anticipate that we will continue to incur losses for the foreseeable future and may never achieve or maintain profitability.

We are a clinical‑stage biotechnology company with a limited operating history, and have not yet generated revenues from the sales of our product candidates. Investment in biotechnology companies is highly speculative because it entails substantial upfront capital expenditures and significant risk that the product candidate will fail to obtain regulatory approval or become commercially viable. We have not yet demonstrated the ability to complete any clinical trials of our product candidates, obtain marketing approvals, manufacture a commercial‑scale product or conduct sales and marketing activities necessary for successful commercialization. We continue to incur significant expenses related to research and development, and other operations in order to commercialize our product candidates. As a result, we are not and have never been profitable and have incurred losses since our inception. Our net loss was $40.2 million, $29.7 million, and $16.3 million for the years ended December 31, 2016,  2015, and 2014 respectively. As of December 31, 2016, we had an accumulated deficit of $90.0 million.

We historically have financed our operations primarily through private placements of our redeemable convertible preferred stock and our recent collaboration agreement with Sanofi-Genzyme. On November 16, 2015 we closed our Initial Public Offering, or IPO, whereby we sold 5,750,000 shares of common stock at a public offering price of $14.00 per share, including 750,000 shares of common stock issued upon the full exercise by the underwriters of their option to purchase additional shares, resulting in net proceeds to us of $72.9 million after deducting underwriting discounts and commissions and offering expenses payable by us. To date, we have devoted substantially all of our financial resources to building our product engine, selecting product programs, conducting research and development, including preclinical development of our product candidates, building our intellectual property portfolio, building our team and establishing our collaboration with Sanofi-Genzyme. We expect that it could be several years, if ever, before we have a commercialized product candidate. We expect to continue to incur significant expenses and increasing operating losses for the foreseeable future. The net losses we incur may fluctuate significantly from quarter to quarter. We anticipate that our expenses will increase substantially if, and as, we:

·

continue investing in our product engine to optimize vector engineering, manufacturing and dosing and delivery techniques;

·

continue development of our clinical candidate, VY‑AADC01;

·

initiate additional preclinical studies and clinical trials for our other programs;

·

continue our process research and development activities, as well as establish our research‑grade and commercial manufacturing capabilities;

·

identify additional CNS diseases for treatment with our AAV gene therapies;

·

seek marketing approvals for VY‑AADC01 or other product candidates that arise from our programs that successfully complete clinical trials;

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·

develop a sales, marketing and distribution infrastructure to commercialize any product candidates for which we may obtain marketing approval;

·

maintain, expand and protect our intellectual property portfolio; and

·

identify, acquire or in‑license other product candidates and technologies.

To become and remain profitable, we must develop and eventually commercialize product candidates with significant market potential, which will require us to be successful in a range of challenging activities. These activities can include completing preclinical studies and clinical trials of our product candidates, obtaining marketing approval for these product candidates, manufacturing, marketing and selling those products that are approved and satisfying any post‑marketing requirements. We may never succeed in any or all of these activities and, even if we do, we may never generate revenues that are significant or large enough to achieve profitability. If we do achieve profitability, we may not be able to sustain or increase profitability on a quarterly or annual basis. Our failure to become and remain profitable would decrease the value of our company and could impair our ability to raise capital, maintain our research and development efforts, expand our business or continue our operations. A decline in the value of our company also could cause you to lose all or part of your investment.

We may not be able to generate sufficient revenue from the commercialization of our product candidates and may never be profitable.

Our ability to generate revenue and achieve profitability depends on our ability, alone or with our collaborative partners, to successfully complete the development of, and obtain the regulatory approvals necessary to commercialize, our current and future product candidates. Our lead product candidate VY‑AADC01 is being evaluated in a Phase 1b clinical trial, and we do not anticipate generating revenues from product sales for the next several years, and we may never succeed in doing so. Our ability to generate future revenues from product sales depends heavily on our and our collaborators’ success in:

·

completing preclinical and clinical development of our product candidates and identifying new product candidates;

·

seeking and obtaining regulatory and marketing approvals for product candidates for which we complete clinical trials;

·

launching and commercializing product candidates for which we obtain regulatory and marketing approval by establishing a sales force, marketing and distribution infrastructure or, alternatively, collaborating with a commercialization partner;

·

qualifying for adequate coverage and reimbursement by government and third‑party payors for our product candidates if and when approved;

·

maintaining and enhancing a sustainable, scalable, reproducible and transferable manufacturing process for our vectors and product candidates;

·

establishing and maintaining supply and manufacturing relationships with third parties that can provide adequate, in both amount and quality, products and services to support clinical development and the market demand for our product candidates, if approved;

·

obtaining market acceptance of our product candidates as a viable treatment option;

·

addressing any competing technological and market developments;

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·

implementing additional internal systems and infrastructure, as needed;

·

negotiating favorable terms in any collaboration, licensing or other arrangements into which we may enter and performing our obligations in such collaborations;

·

maintaining, protecting and expanding our portfolio of intellectual property rights, including patents, trade secrets and know‑how;

·

avoiding and defending against third‑party interference or infringement claims; and

·

attracting, hiring and retaining qualified personnel.

Even if one or more of the product candidates that we develop is approved for commercial sale, we anticipate incurring significant costs associated with commercializing any approved product candidate. Our expenses could increase beyond expectations if we are required by the U.S. Food and Drug Administration, or the FDA, European Medicines Agency, or EMA, or other regulatory authorities to perform preclinical studies and clinical trials in addition to those that we currently anticipate. Even if we are able to generate revenues from the sale of any approved products, we may not become profitable and may need to obtain additional funding to continue operations.

We will need to raise additional funding, which may not be available on acceptable terms, or at all. Failure to obtain this necessary capital when needed may force us to delay, limit or terminate certain of our product development efforts or other operations.

We expect our expenses to increase in connection with our ongoing activities, particularly as we continue the research and development of, initiate further clinical trials of and seek marketing approval for, our product candidates. In addition, if we obtain marketing approval for any of our product candidates, we expect to incur significant expenses related to product sales, medical affairs, marketing, manufacturing and distribution. Since the completion of our IPO on November 16, 2015, we have incurred costs associated with operating as a public company. Accordingly, we need to obtain substantial additional funding in connection with our continuing operations. If we are unable to raise capital when needed or on acceptable terms, we would be forced to delay, reduce or eliminate certain of our research and development programs.

Our operations have consumed significant amounts of cash since inception. As of December 31, 2016, our cash, cash equivalents, and marketable debt securities were $174.4 million. Based upon our current operating plan, we expect that our existing cash, cash equivalents, and marketable debt securities, will enable us to fund our operating expenses and capital expenditure requirements into 2019. 

Our future capital requirements will depend on many factors, including:

·

the scope, progress, results and costs of product discovery, preclinical studies and clinical trials for our product candidates;

·

the scope, prioritization and number of our research and development programs;

·

the costs, timing and outcome of regulatory review of our product candidates;

·

our ability to establish and maintain collaborations on favorable terms, if at all;

·

the achievement of milestones or occurrence of other developments that trigger payments under the Sanofi-Genzyme Collaboration and any other collaboration agreements we obtain;

·

the ability of our collaboration partners to exercise options to extend research and development programs

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·

the extent to which we are obligated to reimburse, or entitled to reimbursement of, clinical trial costs under collaboration agreements, if any;

·

the costs of preparing, filing and prosecuting patent applications, maintaining and enforcing our intellectual property rights and defending intellectual property‑related claims;

·

the extent to which we acquire or in‑license other product candidates and technologies;

·

the costs of securing manufacturing arrangements for commercial production; and

·

the costs of establishing or contracting for sales and marketing capabilities if we obtain regulatory approvals to market our product candidates.

Identifying potential product candidates and conducting preclinical studies and clinical trials is a time‑consuming, expensive and uncertain process that takes years to complete, and we may never generate the necessary data or results required to obtain marketing approval and achieve product sales. In addition, our product candidates, if approved, may not achieve commercial success. Our product revenues, if any, and any commercial milestones or royalty payments under our collaboration agreements, will be derived from or based on sales of products that may not be commercially available for many years, if at all. Accordingly, we will need to continue to rely on additional financing to achieve our business objectives. To the extent that additional capital is raised through the sale of equity or equity‑linked securities, the issuance of those securities could result in substantial dilution for our current stockholders and the terms may include liquidation or other preferences that adversely affect the rights of our current stockholders. To the extent that additional capital is raised through the issuance of debt, the agreement governing such debt may contain restrictive covenants related to our capital raising and other financial and operational matters, which may make it more difficult for us to obtain additional capital and to pursue business operations, including potential acquisitions. Furthermore, the issuance of additional securities, whether equity or debt, by us, or the possibility of such issuance, may cause the market price of our common stock to decline and our existing stockholders may not agree with the terms of such financings. Adequate additional financing may not be available to us on acceptable terms, or at all.

Risks Related to the Development and Regulatory Approval of Our Product Candidates

Our AAV gene therapy product candidates are based on a relatively novel technology, which makes it difficult to predict the time and cost of development and of subsequently obtaining regulatory approval, if at all. No gene therapy product has been approved in the United States and only two such products have been approved in the European Union.

We have concentrated our research and development efforts to date on our product engine, identifying our initial targeted disease indications, and our initial product candidates, and our future success depends on our successful development of viable AAV gene therapy product candidates. Currently, only one of our product candidates, VY‑AADC01, is in clinical development, and the remainder of our product candidates are in preclinical development. There can be no assurance that we will not experience problems or delays in developing our product candidates and that such problems or delays will not cause unanticipated costs, or that any such development problems can be solved. We also may experience unanticipated problems or delays in expanding our manufacturing capacity.

The clinical trial requirements of the FDA, the EMA and other regulatory authorities and the criteria these regulators use to determine the safety and efficacy of a product candidate vary substantially according to the type, complexity, novelty and intended use and market of the product candidate. The regulatory approval process for novel product candidates such as gene therapies can be more expensive and take longer than for other, better known or more extensively studied product candidates. Only two gene therapy products, uniQure N.V.’s, or uniQure, Glybera, and GlaxoSmithKline’s Strimvelis have received marketing authorization from the European Commission and no gene therapy products have received marketing authorization in the United States. It is difficult to determine how long it will take or how much it will cost to obtain regulatory approvals for our product candidates in either the United States or the European Union or how long it will take to commercialize our product candidates. Approvals by the European

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Commission may not be indicative of what the FDA may require for approval and different or additional pre‑clinical studies or clinical trials may be required to support regulatory approval in each respective jurisdiction. Delay or failure to obtain, or unexpected costs in obtaining, the regulatory approval necessary to bring a potential product candidate to market could decrease our ability to generate sufficient product revenue, and our business, financial condition, results of operations and prospects may be harmed.

Regulatory requirements governing gene and cell therapy products have changed frequently and may continue to change in the future.

The FDA has established the Office of Cellular, Tissue and Gene Therapies (now named the Office of Tissues and Advances Therapies, or OTAT) within CBER, to consolidate the review of gene therapy and related products, and has established the Cellular, Tissue and Gene Therapies Advisory Committee to advise CBER in its review. Gene therapy clinical trials conducted at institutions that receive funding for recombinant DNA research from the National Institute of Health, or NIH, are also potentially subject to review by the NIH Office of Biotechnology Activities Recombinant DNA Advisory Committee, or the RAC. The ongoing Phase 1b clinical trial of VY‑AADC01 is being conducted at UCSF and UPMC and therefore is subject to oversight by these authorities. Even though the FDA decides whether individual gene therapy protocols may proceed, the RAC public review process, if undertaken, can delay the initiation of a clinical trial, even if the FDA has reviewed the trial design and details and permitted its initiation. Conversely, the FDA may place an IND on a clinical hold even if the RAC has provided a favorable review or an exemption from in‑depth, public review. In addition, NIH‑funded institutions need to have their institutional biosafety committee as well as their institutional review board, or IRB, review proposed clinical trials to assess the safety of the trial. The ongoing Phase 1b clinical trial of VY‑AADC01 has been reviewed by the Institutional Review Boards, or IRBs, of UCSF and UPMC, and such trials will need to be re‑reviewed by both institutional IRBs if the protocol for the trial is further amended. For any new protocol, the same processes and issues apply. In addition, adverse developments in clinical trials of gene therapy products conducted by us or others may cause the FDA or other oversight bodies to change the requirements for approval of any of our product candidates. Similarly, EMA and local health authorities of individual counties within the European Union may issue new guidelines concerning the clinical development and marketing authorization for gene therapy medicinal products and require that we comply with these new guidelines. The EMA and agencies at both the federal and state level in the United States have expressed an interest in further regulating new biotechnologies, including gene therapy.

These regulatory review committees and advisory groups and the new guidelines they promulgate may lengthen the regulatory review process, require us to perform additional studies, increase our development costs, lead to changes in regulatory positions and interpretations, delay or prevent approval and commercialization of these product candidates or lead to significant post‑approval limitations or restrictions. As we advance our product candidates, we will be required to consult with these regulatory and advisory groups, and comply with applicable guidelines. If we fail to do so, we may be required to delay or discontinue development of certain of our product candidates. These additional processes may result in a review and approval process that is longer than we otherwise would have expected. Delays as a result of increased or lengthier regulatory approval process and further restrictions on development of our product candidates can be costly and could negatively impact our or our collaborators ability to complete clinical trials and commercialize our current and future product candidates in a timely manner, if at all.

Positive results from preclinical studies and early‑stage clinical trials may not be indicative of efficacy in late‑stage clinical trials.

All of our product candidates are in early stages of development. Study designs and results from previous clinical trials are not necessarily predictive of our future clinical trial designs or results, and initial results may not be confirmed upon full analysis of the complete trial or study data. Our product candidates may fail to show the desired safety and efficacy in later stages of clinical development despite having successfully advanced through preclinical studies and initial clinical trials.

A number of companies in the pharmaceutical and biotechnology industries have suffered significant setbacks in late‑stage clinical trials even after achieving promising results in early‑stage clinical trials. If a larger population of patients does not experience positive results, if these results are not reproducible, or if our products show diminishing

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activity over time, our products may not receive approval from the EMA or the FDA. Data obtained from preclinical and clinical activities are subject to varying interpretations, which may delay, limit or prevent regulatory approval. In addition, we may encounter regulatory delays or rejections as a result of many factors, including changes in regulatory policy during the period of product development. Failure to confirm favorable results from earlier trials by demonstrating the safety and effectiveness of our products in late‑stage clinical trials with larger patient populations could harm our business and we may never succeed in commercialization or generating product revenue.

The doses and coverage of the putamen being employed in the ongoing VY-AADC01 Phase 1b clinical trial are higher than those used in prior trials, and may need to be further optimized or we may not generate sufficient clinical data in a placebo-controlled trial to achieve market authorization.

The clinical trial results of some of our collaborators have been negatively affected by factors that had not been fully anticipated prior to examination of the trial results. For example, the magnitude of the clinical responses seen in the Phase 1 clinical trial of VY‑AADC01 conducted by UCSF were similar to placebo effects observed in previous surgical therapies for Parkinson’s disease. As a result, we are unable to rely on the results of this Phase 1 trial for an indication of the efficacy of treatment with VY‑AADC01. We believe that there is a need to optimize the dose and volume of infusion of VY‑AADC01 to substantially increase the coverage of the putamen, the region of the brain targeted by VY‑AADC01, to achieve a clinical benefit. However, we can provide no assurances that we will be able to optimize these parameters and thereby achieve sufficient coverage of the putamen to achieve a clinical benefit.

The ongoing Phase 1b clinical trial of VY‑AADC01 incorporates several design features that are different from those used in UCSF’s previously completed Phase 1 clinical trial, in an attempt to increase the area of the putamen, particularly the posterior putamen, which receives VY‑AADC01 treatment. Larger infusion volumes of VY‑AADC01 are being employed along with higher doses of VY‑AADC01. In addition, the ClearPoint System, which is manufactured by MRI Interventions, Inc., is being used during the surgical procedure to provide accurate placement of the cannula, or small tube used in the procedure, in the putamen to allow for real‑time, intra‑operative MRI to assist the physician in visualizing the delivery of VY‑AADC01 to the putamen and to avoid specific blood vessels during the surgical procedure, with the goal of reducing the risk of hemorrhages, and minimizing off target distribution. In the prior Phase 1 clinical trial of VY‑AADC01 conducted by UCSF, physicians surgically administered VY‑AADC01 without the use of the ClearPoint System and intra-operative MRI, and therefore did not have real‑time visualization of treatment delivery.

Due to the nature of the techniques being used in the Phase 1b clinical trial and the numerous variables that can be changed, it is possible that the data generated from this trial may not provide evidence of clinical benefit. For example, physicians may use cannulas of differing lengths in the infusion procedure, or may use differing infusion speeds or infusion angles. These differences could affect the dose of VY‑AADC01 that ultimately reaches the putamen, leading to highly variable results.

Furthermore, we plan to use VY-AADC02 in our ex-U.S. posterior trajectory trials and later-stage clinical trials as opposed to VY-AADC01. VY-AADC02 uses the same vector as VY-AADC01, but is manufactured using our baclovirus/Sf9 system as opposed to in HEK 293 cells, which is the platform used to manufacture VY-AADC01. Based on our discussions with the FDA, we believe that we have a good understanding of what in vitro testing and preclinical evaluation are required, which we will need to conduct in order to demonstrate comparability between the current version and the new version. Although we believe that VY-AADC02 will be similar or comparable to VY-AADC01, we can provide no assurances that we will be able to successfully complete the necessary in vitro testing and preclinical studies or that the results of such studies and tests will demonstrate the comparability between VY-AADC01 and VY-AADC02.

We may encounter substantial delays in commencement, enrollment or completion of our clinical trials or we may fail to demonstrate safety and efficacy to the satisfaction of applicable regulatory authorities, which could prevent us from commercializing our current and future product candidates on a timely basis, if at all.

Before obtaining marketing approval from regulatory authorities for the sale of our current and future product candidates, we must conduct extensive clinical trials to demonstrate the safety and efficacy of the product candidates. Clinical trials are expensive, time‑consuming and outcomes are uncertain.

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We have very limited experience with clinical trials. To date, we have neither commenced nor completed any clinical trials. The ongoing Phase 1b clinical trial of VY‑AADC01 is being conducted at UCSF and UPMC. We cannot guarantee that any clinical trials will be conducted as planned or completed on schedule, if at all. A clinical trial failure can occur at any stage of testing.

Identifying and qualifying patients to participate in clinical trials of our product candidates is critical to our success. We may not be able to identify, recruit and enroll a sufficient number of patients, or those with required or desired characteristics, to complete our clinical trials in a timely manner. Patient enrollment and trial completion is affected by factors including:

·

perceived risks and benefits of AAV gene therapy‑based approaches for the treatment of CNS diseases;

·

size of the patient population and process for identifying patients;

·

design of the trial protocol;

·

eligibility and exclusion criteria;

·

patients with preexisting antibodies to the vector that preclude their participation in the trial;

·

perceived risks and benefits of the product candidate under study;

·

availability of competing therapies and clinical trials;

·

severity of the disease under investigation;

·

availability of genetic testing for potential patients;

·

proximity and availability of clinical trial sites for prospective patients;

·

ability to obtain and maintain patient consent;

·

risk that enrolled patients will drop out before completion of the trial;

·

our inability to locate appropriately trained physicians to conduct such clinical trials, which may be particularly difficult for the VY‑AADC01 clinical trial, in which we are using the ClearPoint System, which is only available at a small number of academic medical centers in the United States;

·

patient referral practices of physicians; and

·

ability to monitor patients adequately during and after treatment.

Further, we plan to seek marketing approvals in the United States, the European Union and other jurisdictions, which may require that we conduct clinical trials in foreign countries. Our ability to successfully initiate, enroll and complete a clinical trial in any foreign country is subject to numerous risks unique to conducting business in foreign countries, including:

·

difficulty in establishing or managing relationships with clinical research organizations, or CROs, and physicians;

·

different standards for the conduct of clinical trials;

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·

absence in some countries of established groups with sufficient regulatory expertise for review of AAV gene therapy protocols;

·

our inability to locate qualified local partners or collaborators for such clinical trials; and

·

the potential burden of complying with a variety of foreign laws, medical standards and regulatory requirements, including the regulation of pharmaceutical and biotechnology products and treatment.

If we have difficulty enrolling a sufficient number of patients to conduct our clinical trials as planned, we may need to delay, limit or terminate ongoing or planned clinical trials, any of which would harm our business, financial condition, results of operations and prospects.

Other events that may prevent successful or timely completion of clinical development include:

·

delays in reaching a consensus with regulatory authorities on trial design;

·

delays in reaching agreement on acceptable terms with prospective CROs, and clinical trial sites;

·

delays in opening clinical trial sites or obtaining required IRB or independent ethics committee approval at each clinical trial site;

·

imposition of a clinical hold by regulatory authorities as a result of a serious adverse event or after an inspection of our clinical trial operations or trial sites;

·

failure by us, any CROs we engage or any other third parties to adhere to clinical trial requirements;

·

failure to perform in accordance with the FDA’s good clinical practices, or GCP, or applicable regulatory guidelines in the European Union;

·

failure by physicians to adhere to delivery protocols leading to variable results;

·

delays in the testing, validation, manufacturing and delivery of our product candidates to the clinical sites, including delays by third parties with whom we have contracted to perform certain of those functions;

·

delays in having patients complete participation in a trial or return for post‑treatment follow‑up;

·

clinical trial sites or patients dropping out of a trial;

·

selection of clinical endpoints that require prolonged periods of clinical observation or analysis of the resulting data;

·

occurrence of serious adverse events associated with the product candidate that are viewed to outweigh its potential benefits;

·

occurrence of serious adverse events in trials of the same class of agents conducted by other sponsors; or

·

changes in regulatory requirements and guidance that require amending or submitting new clinical protocols.

Any inability to successfully complete preclinical studies and clinical trials could result in additional costs to us or impair our ability to generate revenues from product sales, regulatory and commercialization milestones and royalties.

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In addition, if we make manufacturing or formulation changes to our product candidates, we may need to conduct additional studies to bridge our modified product candidates to earlier versions. Clinical trial delays also could shorten any periods during which we may have the exclusive right to commercialize our product candidates or allow our competitors to bring products to market before we do, which could impair our ability to successfully commercialize our product candidates and may harm our business, financial condition, results of operations and prospects.

Additionally, if the results of our clinical trials are inconclusive or if there are safety concerns or serious adverse events associated with our product candidates, we may:

·

be delayed in obtaining marketing approval for our product candidates, if at all;

·

obtain approval for indications or patient populations that are not as broad as intended or desired;

·

obtain approval with labeling that includes significant use or distribution restrictions or safety warnings;

·

be subject to changes in the way the product is administered;

·

be required to perform additional clinical trials to support approval or be subject to additional post‑marketing testing requirements;

·

have regulatory authorities withdraw, or suspend, their approval of the product or impose restrictions on its distribution in the form of a REMS;

·

be subject to the addition of labeling statements, such as warnings or contraindications;

·

be sued; or

·

experience damage to our reputation.

Our product candidates or the process for administering our product candidates may cause undesirable side effects or have other properties that could delay or prevent their regulatory approval, limit their commercial potential or result in significant negative consequences following any potential marketing approval.

In past clinical trials that were conducted by others with non‑AAV vectors, several significant side effects were caused by gene therapy treatments, including reported cases of leukemia and death. Other potential side effects could include an immunologic reaction and insertional oncogenesis, which is the process whereby the insertion of a functional gene near a gene that is important in cell growth or division results in uncontrolled cell division, which could potentially enhance the risk of malignant transformation. If our vectors demonstrate a similar adverse effect, or other adverse events, we may be required to halt or delay further clinical development of our product candidates. For example, in a recently published review of patients with hepatocellular carcinomas, it was shown that a small subset contained an integrated genome sequence of wild-type AAV2 and it was suggested that AAV2 may be associated with insertional oncogenesis.

In addition to side effects caused by the product candidate, the administration process or related procedures also can cause side effects. VY‑AADC01 and VY‑HTT01 will be administered directly to the targeted cells in the brain, requiring the patient to undergo brain surgery. In a previous Phase 1 clinical trial conducted by UCSF, three patients experienced hemorrhages caused by the surgical procedure for administering VY‑AADC01. We are using the ClearPoint System, which has only been used in limited gene therapy neurosurgeries to date, in the ongoing Phase 1b clinical trial of VY‑AADC01 to provide accurate placement of the cannula in the putamen, to allow for real‑time, intra‑operative MRI to assist the physician in visualizing the delivery of VY‑AADC01 to the putamen and to avoid specific blood vessels during the duration of the surgical procedure, with the goal of reducing the risk of hemorrhages. One patient in the ongoing Phase 1b trial at UCSF experienced two SAEs, a pulmonary embolism, or blood clot in the lungs, and related heart arrhythmia, or irregular heartbeat, which were determined to be related to the surgical procedure and prolonged

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immobility, not VY‑AADC01. If other side effects were to occur in connection with the surgical procedure, our clinical trials could be suspended or terminated.

If in the future we are unable to demonstrate that such side effects were caused by the administration process or related procedures, the FDA, the European Commission, the EMA or other regulatory authorities could order us to cease further development of, or deny approval of, our product candidates for any or all targeted indications. Even if we are able to demonstrate that any future SAEs are not product‑related, and regulatory authorities do not order us to cease further development of our product candidates, such occurrences could affect patient recruitment or the ability of enrolled patients to complete the trial. Moreover, if we elect, or are required, to delay, suspend or terminate any clinical trial of any of our product candidates, the commercial prospects of such product candidates may be harmed and our ability to generate product revenues from any of these product candidates may be delayed or eliminated. Any of these occurrences may harm our ability to develop other product candidates, and may harm our business, financial condition and prospects significantly.

Additionally, if any of our product candidates receives marketing approval, the FDA could require us to adopt a REMS to ensure that the benefits outweigh its risks, which may include, among other things, a medication guide outlining the risks of the product for distribution to patients and a communication plan to health care practitioners. Furthermore, if we or others later identify undesirable side effects caused by our product candidate, several potentially significant negative consequences could result, including:

·

regulatory authorities may suspend or withdraw approvals of such product candidate;

·

regulatory authorities may require additional warnings on the label;

·

we may be required to change the way a product candidate is administered or conduct additional clinical trials;

·

we could be sued and held liable for harm caused to patients; and

·

our reputation may suffer.

Any of these events could prevent us from achieving or maintaining market acceptance of our product candidates and could significantly harm our business, prospects, financial condition and results of operations.

We may be unable to obtain orphan drug designation or exclusivity. If our competitors are able to obtain orphan drug exclusivity for products that constitute the same drug and treat the same indications as our product candidates, we may not be able to have competing products approved by the applicable regulatory authority for a significant period of time.

Regulatory authorities in some jurisdictions, including the United States and the European Union, may designate drugs for relatively small patient populations as orphan drugs. Under the Orphan Drug Act of 1983, the FDA may designate a product candidate as an orphan drug or biological product if it is intended to treat a rare disease or condition, which is generally defined as having a patient population of fewer than 200,000 individuals in the United States, or a patient population greater than 200,000 in the United States where there is no reasonable expectation that the cost of developing the drug or biological product will be recovered from sales in the United States. In the European Union, EMA’s Committee for Orphan Medicinal Products grants orphan drug designation to promote the development of products that are intended for the diagnosis, prevention or treatment of a life‑threatening or chronically debilitating condition affecting not more than five in 10,000 persons in the European Union. Additionally, orphan designation is granted for products intended for the diagnosis, prevention or treatment of a life‑threatening, seriously debilitating or serious and chronic condition and when, without incentives, it is unlikely that sales of the drug in the European Union would be sufficient to justify the necessary investment in developing the drug or biologic product.

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Generally, if a product candidate with an orphan drug designation receives the first marketing approval for the indication for which it has such designation, the product is entitled to a period of marketing exclusivity, which precludes the FDA or the European Commission from approving another marketing application for a product that constitutes the same drug treating the same indication for that marketing exclusivity period, except in limited circumstances. If another sponsor receives such approval before we do (regardless of our orphan drug designation), we will be precluded from receiving marketing approval for our product for the applicable exclusivity period. The applicable period is seven years in the United States and 10 years in the European Union. The exclusivity period in the United States can be extended by nine months if the BLA, sponsor submits pediatric data that fairly respond to a written request from the FDA for such data. The exclusivity period in the European Union can be reduced to six years if a product no longer meets the criteria for orphan drug designation or if the product is sufficiently profitable so that market exclusivity is no longer justified. Orphan drug exclusivity may be revoked if any regulatory agency determines that the request for designation was materially defective or if the manufacturer is unable to assure sufficient quantity of the product to meet the needs of patients with the rare disease or condition.

We believe that all of our current programs may qualify for orphan drug designation. Even if we obtain orphan drug exclusivity for a product candidate, that exclusivity may not effectively protect the product candidate from competition because different drugs or biological products can be approved for the same condition. In the United States, even after an orphan drug is approved, the FDA may subsequently approve another drug or biological product for the same condition if the FDA concludes that the latter drug or biological product is not the same drug or biological product or is clinically superior in that it is shown to be safer, more effective or makes a major contribution to patient care. In the European Union, marketing authorization may be granted to a similar medicinal product for the same orphan indication if:

·

the second applicant can establish in its application that its medicinal product, although similar to the orphan medicinal product already authorized, is safer, more effective or otherwise clinically superior;

·

the holder of the marketing authorization for the original orphan medicinal product consents to a second orphan medicinal product application; or

·

the holder of the marketing authorization for the original orphan medicinal product cannot supply sufficient quantities of orphan medicinal product.

A potential breakthrough therapy designation by the FDA for our product candidates may not lead to a faster development or regulatory review or approval process, and it does not increase the likelihood that our product candidates will receive marketing approval.

We may seek a breakthrough therapy designation for some of our product candidates. A breakthrough therapy is defined as a drug or biological product that is intended, alone or in combination with one or more other drugs, to treat a serious or life‑threatening disease or condition, and preliminary clinical evidence indicates that the drug or biological product may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. For drugs or biological products that have been designated as breakthrough therapies, interaction and communication between the FDA and the sponsor of the trial can help to identify the most efficient path for clinical development while minimizing the number of patients placed in ineffective control regimens. Drugs designated as breakthrough therapies by the FDA are also eligible for accelerated approval.

Designation as a breakthrough therapy is within the discretion of the FDA. Accordingly, even if we believe one of our product candidates meets the criteria for designation as a breakthrough therapy, the FDA may disagree and instead determine not to make such designation. In any event, the receipt of a breakthrough therapy designation for a product candidate may not result in a faster development process, review or approval compared to drugs considered for approval under conventional FDA procedures and does not assure ultimate approval by the FDA. In addition, even if one or more of our product candidates qualify as breakthrough therapies, the FDA may later decide that the drugs or biological products no longer meet the conditions for qualification.

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Even if we successfully complete the necessary clinical trials, we cannot predict when, or if, we will obtain regulatory approval to commercialize a product candidate and the approval may be for a more narrow indication than we seek.

We cannot commercialize a product candidate until the appropriate regulatory authorities have reviewed and approved the product candidate. Even if our product candidates meet their safety and efficacy endpoints in clinical trials, the regulatory authorities may not complete their review processes in a timely manner, issue a complete response letter, or ultimately we may not be able to obtain regulatory approval. Additional delays may result if an FDA Advisory Committee or other regulatory authority recommends non‑approval or restrictions on approval. In addition, we may experience delays or rejections based upon additional government regulation from future legislation or administrative action, or changes in regulatory authority policy during the period of product development, clinical trials and the review process.

Even if we obtain regulatory approval for a product candidate, our products will remain subject to regulatory oversight.

Even if we obtain any regulatory approval for our product candidates, they will be subject to ongoing regulatory requirements for manufacturing, labeling, packaging, storage, advertising, promotion, sampling, record‑keeping and submission of safety and other post‑market information. Any regulatory approvals that we receive for our product candidates also may be subject to a REMS, limitations on the approved indicated uses for which the product may be marketed or to the conditions of approval, or contain requirements for potentially costly post‑marketing testing, including Phase 4 clinical trials, and surveillance to monitor the quality, safety and efficacy of the product. For example, the holder of an approved BLA, is obligated to monitor and report adverse events and any failure of a product to meet the specifications in the BLA. FDA guidance advises that patients treated with some types of gene therapy undergo follow‑up observations for potential adverse events for as long as 15 years. The holder of an approved BLA also must submit new or supplemental applications and obtain FDA approval for certain changes to the approved product, product labeling or manufacturing process. Advertising and promotional materials must comply with FDA rules and are subject to FDA review, in addition to other potentially applicable federal and state laws.

In addition, product manufacturers and their facilities are subject to payment of user fees and continual review and periodic inspections by the FDA and other regulatory authorities for compliance with current good manufacturing practices, or cGMP, requirements and adherence to commitments made in the BLA or foreign marketing application. If we, or a regulatory authority, discover previously unknown problems with a product, such as adverse events of unanticipated severity or frequency, or problems with the facility where the product is manufactured or disagrees with the promotion, marketing or labeling of that product, a regulatory authority may impose restrictions relative to that product, the manufacturing facility or us, including requiring recall or withdrawal of the product from the market or suspension of manufacturing.

If we fail to comply with applicable regulatory requirements following approval of any of our product candidates, a regulatory authority may:

·

issue a warning letter asserting that we are in violation of the law;

·

seek an injunction or impose administrative, civil or criminal penalties or monetary fines;

·

suspend or withdraw regulatory approval;

·

suspend any ongoing clinical trials;

·

refuse to approve a pending BLA or comparable foreign marketing application, or any supplements thereto, submitted by us or our strategic partners;

·

restrict the marketing or manufacturing of the product;

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·

seize or detain the product or otherwise require the withdrawal of the product from the market;

·

refuse to permit the import or export of products; or

·

refuse to allow us to enter into supply contracts, including government contracts.

Any government investigation of alleged violations of law could require us to expend significant time and resources in response and could generate negative publicity. The occurrence of any event or penalty described above may inhibit our ability to commercialize our product candidates and adversely affect our business, financial condition, results of operations and prospects.

In addition, FDA policies, and those of equivalent foreign regulatory agencies, may change and additional government regulations may be enacted that could prevent, limit or delay regulatory approval of our product candidates. We cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative action, either in the United States or abroad. If we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we are not able to maintain regulatory compliance, we may lose any marketing approval that we may have obtained and we may not achieve or sustain profitability, which would harm our business, financial condition, results of operations and prospects.

We face significant competition in an environment of rapid technological change and the possibility that our competitors may achieve regulatory approval before us or develop therapies that are more advanced or effective than ours, which may harm our business and financial condition, and our ability to successfully market or commercialize our product candidates.

The biotechnology and pharmaceutical industries, including the gene therapy field, are characterized by rapidly changing technologies, significant competition and a strong emphasis on intellectual property. We face substantial competition from many different sources, including large and specialty pharmaceutical and biotechnology companies, academic research institutions, government agencies and public and private research institutions.

We are aware of several companies focused on developing gene therapies in various indications, including bluebird bio, Inc., Abeona Therapeutics, Inc., Adverum Biotechnologies, Inc., Agilis Biotherapeutics, LLC, Applied Genetic Technologies Corporation, Asklepios BioPharmaceutical, Inc., Audentes Therapeutics, Inc., AveXis, Inc., Bamboo Therapeutics (now Pfizer Inc., or Pfizer), Dimension Therapeutics, Inc., GenSight Biologics SA, MeiraGTx Ltd., NightstaRx Ltd, REGENXBio Inc., uniQure NV, or uniQure, and Spark Therapeutics, Inc. or Spark, as well as several companies addressing other methods for modifying genes and regulating gene expression. Any advances in gene therapy technology made by a competitor may be used to develop therapies that could compete against any of our product candidates.

We expect that VY-AADC01 will compete with a variety of therapies currently marketed and in development for advanced Parkinson's disease, including DBS marketed by Medtronic plc, Abbott Laboratories (recently acquired from St Jude Medical), and other medical device companies, DUOPA/Duodopa marketed by AbbVie Inc., as well as other novel, non-oral forms of levodopa in development, including NeuroDerm’s ND0612, Acorda Therapeutic’s CVT-301, and sublingual apomorphine in development at Sunovion Pharmaceuticals (acquired from Cynapsus Therapeutics). Gene therapy competition for advanced Parkinson’s disease previously included AMT-090 or AAV-GDNF, but this was recently deprioritized by uniQure Oxford Biomedica plc could commence a Phase 1/2 trial in 2017 of OXB-102/Prosavin subject to successfully out-licensing or spinning out the product.  

We expect that our preclinical programs will compete with a variety of therapies in development, including:

·

VY-SOD101 for a monogenic form of ALS will potentially compete with IONIS-SOD1Rx being developed by Ionis Pharmaceuticals, Inc., or Ionis, in collaboration with Biogen, and Tirasemtiv being developed by Cytokinetics, Inc., or Cytokinetics;  

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·

VY-FXN01 for Friedreich's ataxia will potentially compete with AAV-FXN being developed by Adverum Biotechnologies, AAV-FXN being developed by Bamboo Therapeutics (now Pfizer Inc., or Pfizer), and frataxin targeted gene therapy being developed by Agilis Biotherapeutics, LLC in collaboration with Intrexon Corporation and BB-FA being developed by BioBlast Pharma Ltd., or BioBlast;  

·

VY-HTT01 for Huntington's disease will potentially compete with IONIS-HTTRx being developed by Ionis in collaboration with F. Hoffmann-La Roche Ltd., or Roche, WVE-120101 being developed by WAVE Life Sciences, a gene editing approach being developed by Sangamo Biosciences, Inc. in collaboration with Shire plc, and gene therapies being developed by uniQure and Spark;  

·

VY-TAU01 for FTD/Alzheimer’s disease will potentially compete with Tau antibodies being developed by Roche Genentech Inc. in collaboration with AC Immune SA, Eli Lilly & Co., Bristol-Myers Squibb, AbbVie Inc., Biogen Inc., and several other companies, as well as an antisense oligonucleotide program being developed by Ionis; and

·

VY-NAV01 for severe, chronic pain will potentially compete with Nav1.7 inhibitors being developed by Pfizer, Teva Pharmaceuticals, Biogen Inc., Roche Genentech Inc. in collaboration with Xenon Pharmaceuticals, Amgen, and Astellas Pharma Inc.

Many of our potential competitors, alone or with their strategic partners, have substantially greater financial, technical and other resources, such as larger research and development, clinical, marketing and manufacturing organizations. Mergers and acquisitions in the biotechnology and pharmaceutical industries may result in even more resources being concentrated among a smaller number of competitors. Our commercial opportunity could be reduced or eliminated if competitors develop and commercialize products that are safer, more effective, have fewer or less severe side effects, are more convenient or are less expensive than any products that we may develop. Competitors also may obtain FDA or other regulatory approval for their products more rapidly or earlier than us, which could result in our competitors establishing a strong market position before we are able to enter the market. Additionally, technologies developed by our competitors may render our potential product candidates uneconomical or obsolete, and we may not be successful in marketing our product candidates against competitors.

In addition, as a result of the expiration or successful challenge of our patent rights, we could face more litigation with respect to the validity and scope of patents relating to our competitors’ products. The availability of our competitors’ products could limit the demand, and the price we are able to charge, for any products that we may develop and commercialize. If we are not able to compete effectively against potential competitors, our business will not grow and our financial condition and operations will be harmed.

Even if we obtain and maintain approval for our product candidates from the FDA, we may never obtain approval for our product candidates outside of the United States, which would limit our market opportunities and adversely affect our business.

Approval of a product candidate in the United States by the FDA does not ensure approval of such product candidate by regulatory authorities in other countries or jurisdictions, and approval by one foreign regulatory authority does not ensure approval by regulatory authorities in other foreign countries or by the FDA. Sales of our product candidates outside of the United States will be subject to foreign regulatory requirements governing clinical trials and marketing approval. Even if the FDA grants marketing approval for a product candidate, comparable regulatory authorities of foreign countries also must approve the manufacturing and marketing of the product candidates in those countries. Approval procedures vary among jurisdictions and can involve requirements and administrative review periods different from, and more onerous than, those in the United States, including additional preclinical studies or clinical trials. In many countries outside the United States, a product candidate must be approved for reimbursement before it can be approved for sale in that country. In some cases, the price that we intend to charge for our products, if approved, is also subject to approval. We intend to submit a marketing authorization application to EMA for approval of our product candidates in the European Union, but obtaining such approval from the European Commission following the opinion of EMA is a lengthy and expensive process. Even if a product candidate is approved, the FDA or the European Commission, as the case may be, may limit the indications for which the product may be marketed, require

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extensive warnings on the product labeling or require expensive and time‑consuming additional clinical trials or reporting as conditions of approval. Regulatory authorities in countries outside of the United States and the European Union also have requirements for approval of product candidates with which we must comply prior to marketing in those countries. Obtaining foreign regulatory approvals and compliance with foreign regulatory requirements could result in significant delays, difficulties and costs for us and could delay or prevent the introduction of our product candidates in certain countries.

Further, clinical trials conducted in one country may not be accepted by regulatory authorities in other countries. Also, regulatory approval for any of our product candidates may be withdrawn. If we fail to comply with the regulatory requirements, our target market will be reduced and our ability to realize the full market potential of our product candidates will be harmed and our business, financial condition, results of operations and prospects will be harmed.

Risks Related to Third Parties

To date, all of our revenue has been derived from our collaboration with Sanofi-Genzyme, and if this collaboration agreement were to be terminated, our business financial condition, results of operations and prospects would be harmed.

In February 2015, we entered into a collaboration agreement with Sanofi-Genzyme to leverage our combined expertise and assets in gene therapy for CNS diseases. Under the agreement, we received an upfront commitment of approximately $100.0 million. Pursuant to the agreement, we granted Sanofi-Genzyme an exclusive option to license, develop and commercialize (i) ex‑U.S. rights to our advanced Parkinson’s disease, Friedreich’s ataxia and Huntington’s disease programs and a future program, or the Split Territory Programs, with an incremental option to co‑commercialize the product candidate from our Huntington’s disease program in the United States and (ii) worldwide rights to our SMA program. If Sanofi-Genzyme exercises an option for a Split Territory Program, except for our advanced Parkinson’s disease program, it is required to make an option exercise payment to us. Furthermore, Sanofi-Genzyme shall pay up to $645.0 million in the aggregate upon the achievement of specified regulatory and commercial milestones, and will pay us tiered royalty payments based on a percentage of net sales of product candidates from the programs for which it is exercised its option, or the Optioned Programs.

Following Sanofi-Genzyme’s exercise of an option for a program, Sanofi-Genzyme will have sole responsibility for the development and commercialization of the product candidates from such program in the applicable territory. Sanofi-Genzyme will have the sole discretion to determine and direct its efforts and resources, including the ability to discontinue all efforts and resources, it applies to the development and, if approval is obtained, commercialization and marketing of the product candidates covered by the Optioned Programs in the applicable territories. Sanofi-Genzyme may not be effective in obtaining approvals for the product candidates developed from the Optioned Programs or in marketing, or arranging for necessary supply, manufacturing or distribution relationships for, any approved products. Furthermore, Sanofi-Genzyme may change its strategic focus or pursue alternative technologies in a manner that results in reduced, delayed or no revenue to us. Sanofi-Genzyme has a variety of marketed products and product candidates under collaboration with other companies, including some of our competitors, and its own corporate objectives may not be consistent with our best interests. If Sanofi-Genzyme fails to develop, obtain regulatory approval for or ultimately commercialize any product candidate from the Optioned Programs in the applicable territories, or if Sanofi-Genzyme terminates our collaboration, our business, financial condition, results of operations and prospects would be harmed. In addition, any dispute or litigation proceedings we may have with Sanofi-Genzyme in the future could delay development programs, create uncertainty as to ownership of or access to intellectual property rights, distract management from other business activities and generate substantial expense.

We have only used the ClearPoint System to deliver our product. While other devices for delivery may be used in the future, any issues with the ClearPoint System or the manufacturer of the ClearPoint System, may result in delays in the development and commercialization of certain of our product candidates, which could have an adverse impact on our business.

The ClearPoint System is being used in the ongoing Phase 1b clinical trial of VY-AADC01as a treatment for advanced Parkinson’s disease, and we may continue to use the ClearPoint System in future clinical trials of VY-AADC01 and any other of our product candidates that are injected directly into the brain. Therefore, any issues with the

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ClearPoint System, such as a finding that use of the ClearPoint System causes adverse events or a product recall, or the manufacturer of the ClearPoint System, such as bankruptcy or a decision to stop production of the system due to lack of profitability, could delay the development or commercialization of certain of our product candidates as there currently is no other manufacturer of the ClearPoint System and we are not aware of any other medical device that would be deemed substantially equivalent to the Clearpoint System. As of December 31, 2016, MRI Interventions, the manufacturer of the ClearPoint System, reported cash and cash equivalents of $3.3 million on its balance sheet, secured debt (senior and junior) totaling approximately $4.3 million, and a net loss for $1.7 million for 2016. In addition, in its past several Quarterly Reports on Form 10-Q, MRI Interventions has indicated that there is substantial doubt as to its ability to continue as a going concern, unless it raises the additional capital needed to run the business.

We will seek to enter into collaborations in the future with other third parties. If we are unable to enter into such collaborations, or if these collaborations are not successful, our business could be adversely affected.

We will seek to enter into additional collaborations in the future, however, we may not be able to enter into additional collaborations on favorable terms or at all. Our ability to generate revenues from our collaborations will depend on our and our collaborators’ abilities to successfully perform the functions assigned to each of us in these arrangements. In addition, our collaborators have the ability to abandon research or development projects and terminate applicable agreements. Moreover, an unsuccessful outcome in any clinical trial for which our collaborator is responsible could be harmful to the public perception and prospects of our gene therapy platform.

Our relationship with any future collaborations may pose several risks, including the following:

·

collaborators have significant discretion in determining the efforts and resources that they will apply to these collaborations;

·

collaborators may not perform their obligations as expected;

·

the clinical trials conducted as part of these collaborations may not be successful;

·

collaborators may not pursue development and commercialization of any product candidates that achieve regulatory approval or may elect not to continue or renew development or commercialization programs based on clinical trial results, changes in the collaborators’ strategic focus or available funding or external factors, such as an acquisition, that divert resources or create competing priorities;

·

collaborators may delay clinical trials, provide insufficient funding for clinical trials, stop a clinical trial or abandon a product candidate, repeat or conduct new clinical trials or require a new formulation of a product candidate for clinical trials;

·

we may not have access to, or may be restricted from disclosing, certain information regarding product candidates being developed or commercialized under a collaboration and, consequently, may have limited ability to inform our stockholders about the status of such product candidates;

·

collaborators could independently develop, or develop with third parties, products that compete directly or indirectly with our product candidates if the collaborators believe that competitive products are more likely to be successfully developed or can be commercialized under terms that are more economically attractive than ours;

·

product candidates developed in collaboration with us may be viewed by our collaborators as competitive with their own product candidates or products, which may cause collaborators to cease to devote resources to the commercialization of our product candidates;

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·

a collaborator with marketing and distribution rights to one or more of our product candidates that achieve regulatory approval may not commit sufficient resources to the marketing and distribution of any such product candidate;

·

disagreements with collaborators, including disagreements over proprietary rights, contract interpretation or the preferred course of development of any product candidates, may cause delays or termination of the research, development or commercialization of such product candidates, may lead to additional responsibilities for us with respect to such product candidates or may result in litigation or arbitration, any of which would be time‑consuming and expensive;

·

collaborators may not properly maintain or defend our intellectual property rights or may use our proprietary information in such a way as to invite litigation that could jeopardize or invalidate our intellectual property or proprietary information or expose us to potential litigation;

·

disputes may arise with respect to the ownership or inventorship of intellectual property developed pursuant to our collaborations;

·

collaborators may infringe the intellectual property rights of third parties, which may expose us to litigation and potential liability;

·

the terms of our collaboration agreement may restrict us from entering into certain relationships with other third parties, thereby limiting our options; and

·

collaborations may be terminated for the convenience of the collaborator and, if terminated, we could be required to raise additional capital to pursue further development or commercialization of the applicable product candidates.

If our collaborations do not result in the successful development and commercialization of products, or if one of our collaborators terminates its agreement with us, we may not receive any future research funding or milestone or royalty payments under the collaboration. If we do not receive the funding we expect under these agreements, our development of product candidates could be delayed and we may need additional resources to develop our product candidates. In addition, if one of our collaborators terminates its agreement with us, we may find it more difficult to attract new collaborators and the perception of us in the business and financial communities could be adversely affected. All of the risks relating to product development, regulatory approval and commercialization described in this Annual Report apply to the activities of our collaborators.

We will face significant competition in seeking appropriate collaborators and the negotiation process is time‑consuming and complex. Our ability to reach a definitive collaboration agreement with any future collaborators will depend, among other things, upon our assessment of the collaborator’s resources and expertise, the terms and conditions of the proposed collaboration and the proposed collaborator’s evaluation of several factors. If we license rights to product candidates, we may not be able to realize the benefit of such transactions if we are unable to successfully integrate them with our existing operations and company culture.

We expect to rely on third parties to conduct, supervise and monitor our clinical trials, and if these third parties perform in an unsatisfactory manner, our business could be harmed.

We expect to rely on CROs and clinical trial sites to ensure our clinical trials are conducted properly and on time. While we will have agreements governing their activities, we will have limited influence over their actual performance. We will control only certain aspects of our CROs’ activities. Nevertheless, we will be responsible for ensuring that each of our clinical studies is conducted in accordance with the applicable protocol, legal, regulatory and scientific standards, and our reliance on the CROs does not relieve us of our regulatory responsibilities. For example, the only clinical trial of any of our product candidates or programs is being conducted by UCSF and UPMC. If UCSF or UPMC terminated the clinical trial of VY‑AADC01, we would be required to find another party to conduct any new trials. We may be unable to find a new party to conduct new trials of our product candidates or obtain clinical supply of our product candidates or AAV vectors for such trials.

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We and our CROs are required to comply with the FDA’s GCPs for conducting, recording and reporting the results of IND‑enabling studies and clinical studies to assure that the data and reported results are credible and accurate and that the rights, integrity and confidentiality of clinical trial participants are protected. The FDA enforces these GCPs through periodic inspections of trial sponsors, principal investigators and clinical trial sites. If we or our CROs fail to comply with applicable GCPs, the clinical data generated in our future clinical trials may be deemed unreliable and the FDA may require us to perform additional clinical trials before approving any marketing applications. Upon inspection, the FDA may determine that our clinical trials did not comply with GCPs. In addition, our future clinical trials will require a sufficient number of patients to evaluate the safety and effectiveness of our product candidates. Accordingly, if our CROs fail to comply with these regulations or fail to recruit a sufficient number of patients, we may be required to repeat such clinical trials, which would delay the regulatory approval process.

Our CROs are not our employees, and we are therefore unable to directly monitor whether or not they devote sufficient time and resources to our clinical and nonclinical programs. These CROs may also have relationships with other commercial entities, including our competitors, for whom they may also be conducting clinical trials or other drug development activities that could harm our competitive position. If our CROs do not successfully carry out their contractual duties or obligations, fail to meet expected deadlines, or if the quality or accuracy of the clinical data they obtain is compromised due to the failure to adhere to our clinical protocols or regulatory requirements, or for any other reasons, our clinical trials may be extended, delayed or terminated, and we may not be able to obtain regulatory approval for, or successfully commercialize our product candidates. As a result, our financial results and the commercial prospects for our product candidates would be harmed, our costs could increase, and our ability to generate revenues could be delayed.

Risks Related to Manufacturing

Gene therapies are novel, complex and difficult to manufacture. We could experience manufacturing problems that result in delays in the development or commercialization of our product candidates or otherwise harm our business.

The manufacture of gene therapy products is technically complex, and necessitates substantial expertise and capital investment. Production difficulties caused by unforeseen events may delay the availability of material for our clinical studies. To meet the requirements of our current and planned future trials we have developed a proprietary manufacturing platform that provides a robust and scalable process for AAV production. We are using the baculovirus AAV production system, a technology for producing AAV vectors at scale in insect-derived cells. The process has been successfully transferred to our contract manufacturing organizations where it is used in manufacturing clinical materials in accordance with the FDA’s current good manufacturing practices (cGMPs). We are also building an onsite, state-of-the-art process research and development facility to enable the manufacturing of high quality AAV gene therapies.

We presently contract with third parties for the manufacturing of our program materials. We currently have no plans to build our own clinical or commercial scale manufacturing capabilities. The use of contracted manufacturing and reliance on collaboration partners is relatively cost efficient and has eliminated the need for our direct investment in manufacturing facilities and additional staff early in development. Although we rely on contract manufacturers, we have personnel with manufacturing and quality experience to oversee our contract manufacturers.

To date, our third-party manufacturers have met our manufacturing requirements. We expect third party manufacturers to be capable of providing sufficient quantities of our program materials to meet anticipated clinical trial scale demands. To meet our projected needs for commercial manufacturing, third parties with whom we currently work might need to increase their scale of production or we will need to secure alternate suppliers. We believe that there are alternate sources of supply that can satisfy our clinical and commercial requirements, although we cannot be certain that identifying and establishing relationships with such sources, if necessary, would not result in significant delay or material additional costs.

To date, our third-party manufacturers have met our quality standards. The manufacturers of pharmaceutical products must comply with strictly enforced cGMP requirements, state and federal regulations, as well as foreign requirements when applicable. Any failure of our contract manufacturing organizations to adhere to or document their compliance to such regulatory requirements and their obligation to us could lead to a delay or interruption in the

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availability of our program materials for clinical study. If our manufacturers were to fail to comply with the FDA, EMA, or other regulatory authority, it could result in a clinical hold or termination of a clinical study, or could result in the suspension or delay of marketing approval for our products.

Biological products are inherently difficult to manufacture. Our program materials are manufactured using technically complex processes requiring specialized equipment and facilities, highly specific raw materials, and other production constraints. Our production process requires a number of highly specific raw materials with limited suppliers. Even though we aim to have backup supplies of raw materials whenever possible, we cannot be certain they will be sufficient if our primary sources are unavailable. A shortage of a critical raw material, or technical issue during manufacturing may lead to delays in clinical development or commercialization plans.

Delays in obtaining regulatory approval of our or our collaborators’ manufacturing process and facility or disruptions in our manufacturing process may delay or disrupt our commercialization efforts. To date, no cGMP gene therapy manufacturing facility in the United States has received approval from the FDA for the manufacture of an approved gene therapy product.

Before we can begin to commercially manufacture our product candidates in our own facility, or the facility of a collaborator, we must obtain regulatory approval from the FDA for our manufacturing process and our collaborator’s facility. A manufacturing authorization must also be obtained from the appropriate European Union regulatory authorities. To date, no cGMP gene therapy manufacturing facility in the United States has received approval from the FDA for the manufacture of an approved gene therapy product and, therefore, the timeframe required for us to obtain such approval is uncertain. In addition, we must pass a pre‑approval inspection of our or our collaborator’s manufacturing facility by the FDA and other relevant regulatory authorities before any of our product candidates can obtain marketing approval. In order to obtain approval, we will need to ensure that all of our processes, methods and equipment are compliant with cGMP, and perform extensive audits of vendors, contract laboratories and suppliers. If any of our vendors, contract laboratories or suppliers is found to be out of compliance with cGMP, we may experience delays or disruptions in manufacturing while we work with these third parties to remedy the violation or while we work to identify suitable replacement vendors. The cGMP requirements govern quality control of the manufacturing process and documentation policies and procedures. In complying with cGMP, we will be obligated to expend time, money and effort in production, record keeping and quality control to assure that the product meets applicable specifications and other requirements. If we fail to comply with these requirements, we would be subject to possible regulatory action and may not be permitted to sell any products that we may develop.

Failure to comply with ongoing regulatory requirements could cause us to suspend production or put in place costly or time‑consuming remedial measures.

The regulatory authorities may, at any time following approval of a product for sale, audit the manufacturing facilities for such product. If any such inspection or audit identifies a failure to comply with applicable regulations, or if a violation of product specifications or applicable regulations occurs independent of such an inspection or audit, the relevant regulatory authority may require remedial measures that may be costly or time‑consuming to implement and that may include the temporary or permanent suspension of a clinical trial or commercial sales or the temporary or permanent closure of a manufacturing facility. Any such remedial measures imposed upon our third‑party manufacturers or us could harm our business, financial condition, results of operations and prospects.

If our third‑party manufacturers or we fail to comply with applicable cGMP regulations, FDA and foreign regulatory authorities can impose regulatory sanctions including, among other things, refusal to approve a pending application for a new product candidate or suspension or revocation of a pre‑existing approval. Such an occurrence may cause our business, financial condition, results of operations and prospects could be harmed.

Additionally, if supply from any third-party manufacturers is delayed or interrupted, there could be a significant disruption in the supply of our clinical or commercial material. We have agreements in place with our contract manufacturers pursuant to which we are collaborating on cGMP manufacturing processes and analytical methods for the manufacture of our AAV product candidates. Therefore, if we are unable to enter into an agreement with our contract manufacturers to manufacture clinical or commercial material for our product programs beyond VY-AADC01, or if our agreement with our contract manufacturers were terminated, we would have to find suitable alternative manufacturers.

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This could delay our or our collaborators’ ability to conduct clinical trials or commercialize our current and future product candidates. The regulatory authorities also may require additional trials if a new manufacturer is relied upon for commercial production. Switching manufacturers may involve substantial costs and could result in a delay in our desired clinical and commercial timelines.

Any contamination in the manufacturing process for our products, shortages of raw materials or failure of any of our key suppliers to deliver necessary components could result in delays in our clinical development or marketing schedules.

Given the nature of biologics manufacturing, there is a risk of contamination. Any contamination could adversely affect our ability to produce product candidates on schedule and could, therefore, harm our results of operations and cause reputational damage.

Some of the raw materials required in our manufacturing process are derived from biologic sources. Such raw materials are difficult to procure and may be subject to contamination or recall. A material shortage, contamination, recall or restriction on the use of biologically derived substances in the manufacture of our product candidates could adversely impact or disrupt the commercial manufacturing or the production of clinical material, which could adversely affect our development timelines and our business, financial condition, results of operations and prospects.

Interruptions in the supply of product candidates or inventory loss may harm our operating results and financial condition.

Our product candidates are manufactured using technically complex processes requiring specialized facilities, highly specific raw materials and other production constraints. The complexity of these processes, as well as strict government standards for the manufacture and storage of our product candidates, subjects us to manufacturing risks. While product candidate batches released for use in clinical trials or for commercialization undergo sample testing, some defects may only be identified following product release. In addition, process deviations or unanticipated effects of approved process changes may result in these intermediate products not complying with stability requirements or specifications. Our product candidates must be stored and transported at temperatures within a certain range. If these environmental conditions deviate, our product candidates’ remaining shelf‑lives could be impaired or their efficacy and safety could be negatively impacted, making them no longer suitable for use.

The occurrence, or suspected occurrence, of manufacturing and distribution difficulties can lead to lost inventories and, in some cases, product recalls, with consequential reputational damage and the risk of product liability. The investigation and remediation of any identified problems can cause production delays, substantial expense, lost sales and delays of new product launches. Any interruption in the supply of finished products or the loss thereof could hinder our ability to timely distribute our products and satisfy customer demand. Any unforeseen failure in the storage of the product or loss in supply could delay our clinical trials and, if our product candidates are approved, result in a loss of our market share and negatively affect our business, financial condition, results of operations and prospects.

Risks Related to Our Business Operations

We may not be successful in our efforts to identify or discover additional product candidates and may fail to capitalize on programs or product candidates that may be a greater commercial opportunity, or for which there is a greater likelihood of success.

The success of our business depends upon our ability to identify, develop and commercialize product candidates generated through our product engine. Research programs to identify new product candidates require substantial technical, financial and human resources. Although VY‑AADC01 is currently in clinical development and our other product candidates are in preclinical development, we may fail to identify other potential product candidates for clinical development for several reasons. For example, our research may be unsuccessful in identifying potential product candidates or our potential product candidates may be shown to have harmful side effects, may be commercially impracticable to manufacture or may have other characteristics that may make the products unmarketable or unlikely to receive marketing approval.

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Additionally, because we have limited resources, we may forego or delay pursuit of opportunities with certain programs or product candidates or for indications that later prove to have greater commercial potential. Our spending on current and future research and development programs may not yield any commercially viable products. If we do not accurately evaluate the commercial potential for a particular product candidate, we may relinquish valuable rights to that product candidate through strategic collaboration, licensing or other arrangements in cases in which it would have been more advantageous for us to retain sole development and commercialization rights to such product candidate. Alternatively, we may allocate internal resources to a product candidate in a therapeutic area in which it would have been more advantageous to enter into a partnering arrangement.

If any of these events occur, we may be forced to abandon our development efforts with respect to a particular product candidate or fail to develop a potentially successful product candidate, which could harm our business, financial condition, results of operations and prospects.

Our future success depends on our ability to retain key members of our management team, and to attract, retain and motivate qualified personnel.

We are highly dependent on Steven M. Paul, M.D., our President and Chief Executive Officer as well as certain other members of our management team, the loss of whose services may adversely impact the achievement of our objectives. While we have entered into employment agreements or offer letters with each of our executive officers, any of them could leave our employment at any time, as all of our employees are “at will” employees. We currently do not have “key person” insurance on any of our employees. The loss of the services of one or more of our current employees might impede the achievement of our research, development and commercialization objectives.

Recruiting and retaining other qualified employees, consultants and advisors for our business, including scientific and technical personnel, also will be critical to our success. There currently is a shortage of skilled individuals with substantial gene therapy experience, which is likely to continue. As a result, competition for skilled personnel, including in gene therapy research and vector manufacturing, is intense and the turnover rate can be high. We may not be able to attract and retain personnel on acceptable terms given the competition among numerous pharmaceutical and biotechnology companies and academic institutions for individuals with similar skill sets. In addition, failure to succeed in preclinical or clinical trials or applications for marketing approval may make it more challenging to recruit and retain qualified personnel. The inability to recruit, or loss of services of certain executives, key employees, consultants or advisors, may impede the progress of our research, development and commercialization objectives and could harm our business, financial condition, results of operations and prospects.

If we are unable to manage expected growth in the scale and complexity of our operations, our performance may suffer.

If we are successful in executing our business strategy, we will need to expand our managerial, operational, financial and other systems and resources to manage our operations, continue our research and development activities and, in the longer term, build a commercial infrastructure to support commercialization of any of our product candidates that are approved for sale. We can provide no assurances that we will have sufficient resources in the future to manage all of our planned programs. Future growth would impose significant added responsibilities on members of management. It is likely that our management, finance, development personnel, systems and facilities currently in place may not be adequate to support this future growth. Our need to effectively manage our operations, growth and product candidates requires that we continue to develop more robust business processes and improve our systems and procedures in each of these areas and to attract and retain sufficient numbers of talented employees. We may be unable to successfully implement these tasks on a larger scale and, accordingly, may not achieve our research, development and growth goals.

Our employees, principal investigators, consultants and commercial partners may engage in misconduct or other improper activities, including non‑compliance with regulatory standards and requirements and insider trading.

We are exposed to the risk of fraud or other misconduct by our employees, principal investigators, consultants and commercial partners. Misconduct by these parties could include intentional failures to comply with FDA regulations or the regulations applicable in the European Union and other jurisdictions, provide accurate information to the FDA, the

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European Commission and other regulatory authorities, comply with healthcare fraud and abuse laws and regulations in the United States and abroad, report financial information or data accurately or disclose unauthorized activities to us. In particular, sales, marketing and business arrangements in the healthcare industry are subject to extensive laws and regulations intended to prevent fraud, misconduct, kickbacks, self‑dealing and other abusive practices. These laws and regulations restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales commission, customer incentive programs and other business arrangements. Such misconduct also could involve the improper use of information obtained in the course of clinical trials or interactions with the FDA or other regulatory authorities, which could result in regulatory sanctions and cause serious harm to our reputation. We have adopted a code of conduct applicable to all of our employees, but it is not always possible to identify and deter employee misconduct, and the precautions we take to detect and prevent this activity may not be effective in controlling unknown or unmanaged risks or losses or in protecting us from government investigations or other actions or lawsuits stemming from a failure to comply with these laws or regulations. If any such actions are instituted against us, and we are not successful in defending ourselves or asserting our rights, those actions could have a significant impact on our business, financial condition, results of operations and prospects, including the imposition of significant fines or other sanctions.

Healthcare legislative reform measures may harm our business and results of operations.

In the United States, there have been, and continue to be, several legislative initiatives to contain healthcare costs. For example, in March 2010, the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act of 2010, or the Affordable Care Act, was passed, which substantially changes the way health care is financed by both the government and private insurers, and significantly impacts the U.S. pharmaceutical industry. The Affordable Care Act, among other things: (i) imposes a new methodology by which rebates owed by manufacturers under the Medicaid Drug Rebate Program are calculated for drugs that are inhaled, infused, instilled, implanted or injected; (ii) increases the minimum Medicaid rebates owed by manufacturers under the Medicaid Drug Rebate Program; (iii) extends manufacturers’ Medicaid rebate liability to covered drugs dispensed to individuals enrolled in Medicaid managed care organizations; (iv) establishes an annual, nondeductible fee on any entity that manufactures or imports certain branded prescription drugs and biologic products; (v) expands the availability of lower pricing under the 340B drug pricing program by expanding the types of entities eligible to participate in the program; (vi) establishes a new Medicare Part D coverage gap discount program, in which manufacturers must agree to offer 50% point‑of‑sale discounts off negotiated prices of applicable brand drugs to eligible beneficiaries during their coverage gap period, as a condition for the manufacturer’s outpatient drugs to be covered under Medicare Part D; (vii) expands entities eligible for discounts under the Public Health Services pharmaceutical pricing program; and (viii) initiates a new Patient Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research, along with funding for such research. Additionally, in the United States, the Biologics Price Competition and Innovation Act of 2009, as part of the Affordable Care Act, created an abbreviated approval pathway for biologic products that are demonstrated to be “biosimilar or interchangeable” with an FDA‑approved biologic product. This new pathway could allow competitors to reference data from biologic products already approved 12 years after the time of approval. This could expose us to potential competition by lower‑cost biosimilars even if we commercialize a product candidate faster than our competitors.

Additional changes that may affect our business include those governing enrollment in federal healthcare programs, reimbursement changes, rules regarding prescription drug benefits under the health insurance exchanges and fraud and abuse and enforcement. Continued implementation of the Affordable Care Act and the passage of additional laws and regulations may result in the expansion of new programs such as Medicare payment for performance initiatives, and may impact existing government healthcare programs, such as by improving the physician quality reporting system and feedback program. Other legislative changes have been adopted since the Affordable Care Act was enacted, including aggregate reductions to Medicare payments to providers of up to 2% per fiscal year effective April 1, 2013. These reductions will stay in effect through 2025 unless additional congressional action is taken. Additionally, in January 2013, President Obama signed into law the American Taxpayer Relief Act of 2012, which, among other things, reduced Medicare payments to several providers, and increased the statute of limitations period for the government to recover overpayments to providers from three to five years. These laws may result in additional reductions in Medicare and other healthcare funding, which could have a material adverse effect on customers for our drugs, if approved, and, accordingly, our financial operations.

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For each state that does not choose to expand its Medicaid program, there may be fewer insured patients overall, which could impact the sales, business and financial condition of manufacturers of branded prescription drugs. Where patients receive insurance coverage under any of the options made available through the Affordable Care Act, the possibility exists that manufacturers may be required to pay Medicaid rebates on that resulting drug utilization, a decision that could impact manufacturer revenues. The U.S. federal government also has announced delays in the implementation of key provisions of the Affordable Care Act. The implications of these delays for our and our partners’ business and financial condition, if any, are not yet clear.

We expect that additional state and federal healthcare reform measures will be adopted in the future, any of which could limit the amounts that federal and state governments will pay for healthcare products and services, which could result in reduced demand for our product candidates or additional pricing pressures. We cannot predict what healthcare reform initiatives may be adopted in the future. Further federal, state and foreign legislative and regulatory developments are likely, and we expect ongoing initiatives to increase pressure on drug pricing. Such reforms could have an adverse effect on anticipated revenues from product candidates that we may successfully develop and for which we may obtain regulatory approval and may affect our overall financial condition and ability to develop product candidates.

Some of the provisions of the Affordable Care Act have yet to be fully implemented, while certain provisions have been subject to judicial and Congressional challenges. In January 2017, Congress voted to adopt a budget resolution for fiscal year 2017, that while not a law, is widely viewed as the first step toward the passage of legislation that would repeal certain aspects of the Affordable Care Act. Further, on January 20, 2017, President Trump signed an Executive Order directing federal agencies with authorities and responsibilities under the Affordable Care Act to waive, defer, grant exemptions from, or delay the implementation of any provision of the Affordable Care Act that would impose a fiscal burden on states or a cost, fee, tax, penalty or regulatory burden on individuals, healthcare providers, health insurers, or manufacturers of pharmaceuticals or medical devices. Congress also could consider subsequent legislation to replace elements of the Affordable Care Act that are repealed. The implications of a potential repeal and/or replacement of the Affordable Care Act, for our and our partners’ business and financial condition, if any, are not yet clear.

We may be subject, directly or indirectly, to federal, state, and foreign healthcare laws and regulations, including fraud and abuse laws, false claims laws and health information privacy and security laws. If we are unable to comply, or have not fully complied, with such laws, we could face substantial penalties.

If we obtain FDA approval for any of our product candidates and begin commercializing those products in the United States, our operations will be directly, or indirectly through our prescribers, customers and purchasers, subject to various federal and state laws and regulations, including, without limitation, the federal Anti‑Kickback Statute, the federal civil and criminal false claims act, and the Physician Payments Sunshine Act and regulations. These laws will impact, among other things, our proposed sales, marketing and educational programs. In addition, we may be subject to data privacy laws by both the federal government and the states in which we conduct our business. Such laws that may constrain the business or financial arrangements and relationships through which we conduct our operations include, but are not limited to:

·

the federal Anti‑Kickback Statute, which prohibits, among other things, persons and entities from knowingly and willfully soliciting, receiving, offering or paying any remuneration (including any kickback, bribe or rebate), directly or indirectly, overtly or covertly, in cash or in kind, to induce or in return for either the referral of an individual for, or the purchase, recommendation, leasing or furnishing of, an item or service reimbursable under a federal healthcare program, such as the Medicare and Medicaid programs. This statute has been interpreted to apply to arrangements between pharmaceutical manufacturers on the one hand, and prescribers, purchasers and formulary managers on the other. Further, the Affordable Care Act amended the intent requirement of the federal Anti‑Kickback Statute. A person or entity no longer needs to have actual knowledge of this statute or specific intent to violate it;

·

the federal civil and criminal false claims laws and civil monetary penalty laws, including the civil False Claims Act, which prohibit, among other things, individuals or entities from knowingly presenting, or causing to be presented, claims for payment or approval from Medicare, Medicaid or other government payors that are false or fraudulent, or making a false statement to avoid, decrease, or conceal an obligation to pay money to the federal government. The Affordable Care Act provided and recent government cases

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against pharmaceutical and medical device manufacturers support the view that federal Anti‑Kickback Statute violations and certain marketing practices, including off‑label promotion, may implicate the civil False Claims Act;

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the federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, which created additional federal criminal statutes that prohibit a person from knowingly and willfully executing or attempting to execute a scheme or from making false or fraudulent statements to defraud any healthcare benefit program, regardless of the payor (e.g., public or private);

·

HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act, or HITECH, and its implementing regulations, and as amended again by the final HIPAA omnibus rule, Modifications to the HIPAA Privacy, Security, Enforcement, and Breach Notification Rules Under HITECH and the Genetic Information Nondiscrimination Act; Other Modifications to HIPAA, published in January 2013, which imposes certain requirements relating to the privacy, security and transmission of individually identifiable health information without appropriate authorization by entities subject to the rule, such as health plans, health care clearinghouses and health care providers;

·

federal transparency laws, including the federal Physician Payments Sunshine Act, which is part of the Affordable Care Act, that requires certain manufacturers of drugs, devices, biologics and medical supplies for which payment is available under Medicare, Medicaid, or the Children’s Health Insurance Program, with specific exceptions, to report annually to CMS information related to payments and other transfers of value provided to physicians and teaching hospitals, and ownership and investment interests held by physicians and their immediate family members, by the 90th day of each subsequent calendar year, and disclosure of such information is made by CMS on a publicly available website; and

·

state and/or foreign law equivalents of each of the above federal laws, such as state anti‑kickback and false claims laws that may apply to arrangements and claims involving health care items or services reimbursed by non‑governmental third party payors; state laws that require drug manufacturers to report information related to payments and other transfers of value to physicians and other healthcare providers or marketing expenditures; state laws that require pharmaceutical companies to comply with the pharmaceutical industry’s voluntary compliance guidelines and the relevant compliance guidance promulgated by the federal government; and state and foreign laws governing the privacy and security of health information in certain circumstances, many of which differ from each other in significant ways and may not have the same effect, thus complicating compliance efforts in certain circumstances, such as specific disease states.

Because of the breadth of these laws and the narrowness of the statutory exceptions and safe harbors available, it is possible that some of our business activities could be subject to challenge under one or more of such laws. If our operations are found to be in violation of any of the laws described above or any other government regulations that apply to us, we may be subject to penalties, including civil and criminal penalties, damages, fines, exclusion from participation in government health care programs, such as Medicare and Medicaid, disgorgement, contractual damages, reputational harm, diminished profits and future earnings, imprisonment and the curtailment or restructuring of our operations, any of which could adversely affect our ability to operate our business and our results of operations.

The provision of benefits or advantages to physicians to induce or encourage the prescription, recommendation, endorsement, purchase, supply, order or use of medicinal products is prohibited in the European Union. The provision of benefits or advantages to physicians is also governed by the national anti‑bribery laws of European Union Member States, such as the UK Bribery Act 2010. Infringement of these laws could result in substantial fines and imprisonment.

Payments made to physicians in certain European Union Member States must be publically disclosed. Moreover, agreements with physicians often must be the subject of prior notification and approval by the physician’s employer, his or her competent professional organization and/or the regulatory authorities of the individual European Union Member States. These requirements are provided in the national laws, industry codes or professional codes of conduct, applicable in the European Union Member States. Failure to comply with these requirements could result in reputational risk, public reprimands, administrative penalties, fines or imprisonment.

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The collection and use of personal health data in the European Union is governed by the provisions of the Data Protection Directive. This directive imposes several requirements relating to the consent of the individuals to whom the personal data relates, the information provided to the individuals, notification of data processing obligations to the competent national data protection authorities and the security and confidentiality of the personal data. The Data Protection Directive also imposes strict rules on the transfer of personal data out of the European Union to the United States. Failure to comply with the requirements of the Data Protection Directive and the related national data protection laws of the European Union Member States may result in fines and other administrative penalties. The draft Data Protection Regulation currently going through the adoption process is expected to introduce new data protection requirements in the European Union and substantial fines for breaches of the data protection rules. If the draft Data Protection Regulation is adopted in its current form it may increase our responsibility and liability in relation to personal data that we process and we may be required to put in place additional mechanisms ensuring compliance with the new data protection rules. This may be onerous and adversely affect our business, financial condition, results of operations and prospects.

Product liability lawsuits against us could cause us to incur substantial liabilities and could limit commercialization of any product candidates that we may develop.

We will face an inherent risk of product liability exposure related to the testing of our product candidates in clinical trials and may face an even greater risk if we commercialize any products that we may develop. If we cannot successfully defend ourselves against claims that our product candidates caused injuries, we could incur substantial liabilities. Regardless of merit or eventual outcome, liability claims may result in:

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decreased demand for any product candidates that we may develop;

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loss of revenue;

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substantial monetary awards to trial participants or patients;

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significant time and costs to defend the related litigation;

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withdrawal of clinical trial participants;

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the inability to commercialize any product candidates that we may develop; and

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injury to our reputation and significant negative media attention.

Although we maintain product liability insurance coverage in the amount of $10.0 million per occurrence and $50.0 million in the aggregate, this insurance may not be adequate to cover all liabilities that we may incur. We anticipate that we will need to increase our insurance coverage each time we commence a clinical trial and if we successfully commercialize any product candidate. Insurance coverage is increasingly expensive. We may not be able to maintain insurance coverage at a reasonable cost or in an amount adequate to satisfy any liability that may arise.

If we fail to comply with environmental, health and safety laws and regulations, we could become subject to fines or penalties or incur costs that could harm our business.

We are subject to numerous environmental, health and safety laws and regulations, including those governing laboratory procedures and the generation, handling, use, storage, treatment, manufacture, transportation and disposal of, and exposure to, hazardous materials and wastes, as well as laws and regulations relating to occupational health and safety. Our operations involve the use of hazardous and flammable materials, including chemicals and biologic and radioactive materials. Our operations also produce hazardous waste products. We generally contract with third parties for the disposal of these materials and wastes. We cannot eliminate the risk of contamination or injury from these materials. In the event of contamination or injury resulting from our use of hazardous materials, we could be held liable for any

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resulting damages, and any liability could exceed our resources. We also could incur significant costs associated with civil or criminal fines and penalties.

Although we maintain workers’ compensation insurance for certain costs and expenses we may incur due to injuries to our employees resulting from the use of hazardous materials or other work related injuries, this insurance may not provide adequate coverage against potential liabilities. We do not maintain insurance for toxic tort claims that may be asserted against us in connection with our storage or disposal of biologic, hazardous or radioactive materials.

In addition, we may incur substantial costs in order to comply with current or future environmental, health and safety laws and regulations, which have tended to become more stringent over time. These current or future laws and regulations may impair our research, development or production efforts. Failure to comply with these laws and regulations also may result in substantial fines, penalties or other sanctions or liabilities, which could harm our business, financial condition, results of operations and prospects.

Unfavorable global economic conditions could adversely affect our business, financial condition or results of operations.

Our results of operations could be adversely affected by general conditions in the global economy and in the global financial markets. The most recent global financial crisis caused extreme volatility and disruptions in the capital and credit markets. A severe or prolonged economic downturn, such as the most recent global financial crisis, could result in a variety of risks to our business, including weakened demand for our product candidates and our ability to raise additional capital when needed on acceptable terms, if at all. This is particularly true in the European Union, which is undergoing a continued severe economic crisis. A weak or declining economy could strain our suppliers, possibly resulting in supply disruption, or cause delays in payments for our services by third‑party payors or our collaborators. Any of the foregoing could harm our business and we cannot anticipate all of the ways in which the current economic climate and financial market conditions could adversely impact our business.

Our internal computer systems, or those of our collaborators or other contractors or consultants, may fail or suffer security breaches, which could result in a material disruption of our product development programs.

Our internal computer systems and those of our current and any future collaborators and other contractors or consultants are vulnerable to damage from computer viruses, unauthorized access, natural disasters, terrorism, war and telecommunication and electrical failures. While we have not experienced any such material system failure, accident or security breach to date, if such an event were to occur and cause interruptions in our operations, it could result in a disruption of our development programs and our business operations, whether due to a loss of our trade secrets or other proprietary information or other similar disruptions. For example, the loss of clinical trial data from completed or future clinical trials could result in delays in our regulatory approval efforts and significantly increase our costs to recover or reproduce the data. To the extent that any disruption or security breach were to result in a loss of, or damage to, our data or applications, or inappropriate disclosure of confidential or proprietary information, we could incur liability, our competitive position could be harmed and the further development and commercialization of our product candidates could be delayed.

Risks Related to the Commercialization of Our Product Candidates

The affected populations for our product candidates may be smaller than we or third parties currently project, which may affect the addressable markets for our product candidates.

Our projections of the number of people who have the diseases we are seeking to treat, as well as the subset of people with these diseases who have the potential to benefit from treatment with our product candidates, are estimates based on our knowledge and understanding of these diseases. The total addressable market opportunity for our product candidates will ultimately depend upon a number of factors including the diagnosis and treatment criteria included in the final label, if approved for sale in specified indications, acceptance by the medical community, patient access and product pricing and reimbursement. Prevalence estimates are frequently based on information and assumptions that are not exact and may not be appropriate, and the methodology is forward‑looking and speculative. The process we have

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used in developing an estimated prevalence range for the indications we are targeting has involved collating limited data from multiple sources. Accordingly, the prevalence estimates included in this Annual Report should be viewed with caution. Further, the data and statistical information used in this Annual Report, including estimates derived from them, may differ from information and estimates made by our competitors or from current or future studies conducted by independent sources.

The use of such data involves risks and uncertainties and is subject to change based on various factors. Our estimates may prove to be incorrect and new studies may change the estimated incidence or prevalence of the diseases we seek to address. The number of patients with the diseases we are targeting in the United States, the European Union and elsewhere may turn out to be lower than expected or may not be otherwise amenable to treatment with our products, or new patients may become increasingly difficult to identify or access, all of which would harm our results of operations and our business.

If we are unable to establish sales, medical affairs and marketing capabilities or enter into agreements with third parties to market and sell our product candidates, we may be unable to generate any product revenue.

We currently have no sales and marketing organization. To successfully commercialize any products that may result from our clinical development programs, we will need to develop these capabilities, either on our own or with others. The establishment and development of our own commercial team or the establishment of a contract sales force to market any products we may develop will be expensive and time‑consuming and could delay any product launch. Moreover, we cannot be certain that we will be able to successfully develop this capability. Under our collaboration agreement with Sanofi-Genzyme, we have granted Sanofi-Genzyme an exclusive option to license, develop and commercialize ex‑U.S. rights to our advanced Parkinson’s disease program, our Friedreich’s ataxia program, a future program to be designated by Sanofi-Genzyme and our Huntington’s disease program. Additionally, we have granted Sanofi-Genzyme an incremental option to co‑commercialize our Huntington’s disease program in the United States and to worldwide rights to our spinal muscular atrophy program. If Sanofi-Genzyme exercises any of these options, except for our advanced Parkinson’s disease program, we would be eligible to receive specified option fees. In addition we would be eligible to receive specified milestone payments and royalties for any product developed in such programs. In the future, we may enter into collaborations regarding other of our product candidates with other entities to utilize their established marketing and distribution capabilities, but we may be unable to enter into such agreements on favorable terms, if at all. If any current or future collaborators do not commit sufficient resources to commercialize our products, or we are unable to develop the necessary capabilities on our own, we will be unable to generate sufficient product revenue to sustain our business. We compete with many companies that currently have extensive, experienced and well‑funded medical affairs, marketing and sales operations to recruit, hire, train and retain marketing and sales personnel. We also face competition in our search for third parties to assist us with the sales and marketing efforts of our product candidates. Without an internal team or the support of a third‑party to perform marketing and sales functions, we may be unable to compete successfully against these more established companies.

Our efforts to educate the medical community and third‑party payors on the benefits of our product candidates may require significant resources and may never be successful. Such efforts may require more resources than are typically required due to the complexity and uniqueness of our potential products. If any of our product candidates is approved but fails to achieve market acceptance among physicians, patients or third‑party payors, we will not be able to generate significant revenues from such product, which could harm our business, financial condition, results of operations and prospects.

The insurance coverage and reimbursement status of newly‑approved products is uncertain. Failure to obtain or maintain adequate coverage and reimbursement for our product candidates, if approved, could limit our ability to market those products and decrease our ability to generate product revenue.

We expect the cost of a single administration of gene therapy products, such as those we are developing, to be substantial, when and if they achieve regulatory approval. We expect that coverage and reimbursement by government and private payors will be essential for most patients to be able to afford these treatments. Accordingly, sales of our product candidates will depend substantially, both domestically and abroad, on the extent to which the costs of our product candidates will be paid by health maintenance, managed care, pharmacy benefit and similar healthcare management organizations, or will be reimbursed by government authorities, private health coverage insurers and other

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third‑party payors. Coverage and reimbursement by a third‑party payor may depend upon several factors, including the third‑party payor’s determination that use of a product is:

·

a covered benefit under its health plan;

·

safe, effective and medically necessary;

·

appropriate for the specific patient;

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cost‑effective; and

·

neither experimental nor investigational.

No uniform policy requirement for coverage and reimbursement for drug products exists among third‑party payors. Therefore, coverage and reimbursement for drug products can differ significantly from payor to payor. As a result, obtaining coverage and reimbursement for a product from third‑party payors is a time‑consuming and costly process that could require us to provide to each different payor supporting scientific, clinical and cost‑effectiveness data. We may not be able to provide data sufficient to gain acceptance with respect to coverage and reimbursement. If coverage and reimbursement are not available, or are available only at limited levels, we may not be able to successfully commercialize our product candidates. Even if coverage is provided, the approved reimbursement amount may not be adequate to realize a sufficient return on our investment. Assuming we obtain coverage for a given product by a third‑party payor, the resulting reimbursement payment rates may not be adequate or may require co‑payments that patients find unacceptably high. Patients who are prescribed medications for the treatment of their conditions, and their prescribing physicians, generally rely on third‑party payors to reimburse all or part of the costs associated with their prescription drugs. Patients are unlikely to use our products unless coverage is provided and reimbursement is adequate to cover all or a significant portion of the cost of our products. Therefore, coverage and adequate reimbursement is critical to new product acceptance. Additionally, there may be significant delays in obtaining coverage and reimbursement for newly approved drugs and biologics, and coverage may be more limited than the purposes for which the drug is approved by the FDA or comparable foreign regulatory authorities.

There is significant uncertainty related to third‑party coverage and reimbursement of newly approved products. In the United States, third‑party payors, including government payors such as the Medicare and Medicaid programs, play an important role in determining the extent to which new drugs and biologics will be covered and reimbursed. The Medicare and Medicaid programs increasingly are used as models for how private payors and government payors develop their coverage and reimbursement policies. Currently, no gene therapy product has been approved for coverage and reimbursement by the Centers for Medicare & Medicaid Services, or CMS, the agency responsible for administering the Medicare program. It is difficult to predict what CMS will decide with respect to coverage and reimbursement for fundamentally novel products such as ours, as there is no body of established practices and precedents for these types of products. Moreover, reimbursement agencies in the European Union may be more conservative than CMS. For example, several cancer drugs have been approved for reimbursement in the United States and have not been approved for reimbursement in certain European Union Member States. It is difficult to predict what third‑party payors will decide with respect to the coverage and reimbursement for our product candidates, especially given that the cost of our product candidates is likely to be very high and pricing of such products is highly uncertain.

Outside the United States, international operations generally are subject to extensive government price controls and other market regulations, and increasing emphasis on cost‑containment initiatives in the European Union, Canada and other countries may put pricing pressure on us. For example, one gene therapy product was approved in the European Union in 2012 but is yet to be widely available commercially. In many countries, the prices of medical products are subject to varying price control mechanisms as part of national health systems. In general, the prices of medicines under such systems are substantially lower than in the United States. Other countries allow companies to fix their own prices for medical products, but monitor and control company profits. Additional foreign price controls or other changes in pricing regulation could restrict the amount that we are able to charge for our product candidates. Accordingly, in markets outside the United States, the reimbursement for our products may be reduced compared with the United States and may be insufficient to generate commercially reasonable product revenues.

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Moreover, increasing efforts by government and third‑party payors in the United States and abroad to cap or reduce healthcare costs may cause such organizations to limit both coverage and the level of reimbursement for new products approved and, as a result, they may not cover or provide adequate payment for our product candidates. Payors increasingly are considering new metrics as the basis for reimbursement rates, such as average sales price, or ASP, average manufacturer price, or AMP, and Actual Acquisition Cost. The existing data for reimbursement based on some of these metrics is relatively limited, although certain states have begun to survey acquisition cost data for the purpose of setting Medicaid reimbursement rates, and CMS has begun making pharmacy National Average Drug Acquisition Cost and National Average Retail Price data publicly available on at least a monthly basis. Therefore, it may be difficult to project the impact of these evolving reimbursement metrics on the willingness of payors to cover candidate products that we or our partners are able to commercialize. We expect to experience pricing pressures in connection with the sale of any of our product candidates due to the trend toward managed healthcare, the increasing influence of health maintenance organizations and additional legislative changes. The downward pressure on healthcare costs in general, particularly prescription drugs and surgical procedures and other treatments, has become intense. As a result, increasingly high barriers are being erected to the entry of new products such as ours.

The commercial success of any of our product candidates will depend upon its degree of market acceptance by physicians, patients, third‑party payors and others in the medical community.

Ethical, social and legal concerns about gene therapy could result in additional regulations restricting or prohibiting our products. Even with the requisite approvals from the FDA in the United States, EMA in the European Union and other regulatory authorities internationally, the commercial success of our product candidates will depend, in part, on the acceptance of physicians, patients and health care payors of gene therapy products in general, and our product candidates in particular, as medically necessary, cost‑effective and safe. Any product that we commercialize may not gain acceptance by physicians, patients, health care payors and others in the medical community. If these products do not achieve an adequate level of acceptance, we may not generate significant product revenue and may not become profitable. The degree of market acceptance of gene therapy products and, in particular, our product candidates, if approved for commercial sale, will depend on several factors, including:

·

the efficacy and safety of such product candidates as demonstrated in clinical trials;

·

the potential and perceived advantages of product candidates over alternative treatments;

·

the cost of treatment relative to alternative treatments;

·

the clinical indications for which the product candidate is approved by the FDA or the European Commission;

·

patient awareness of, and willingness to seek, genotyping;

·

the willingness of physicians to prescribe new therapies;

·

the willingness of physicians to undergo specialized training with respect to administration of our product candidates;

·

the willingness of the target patient population to try new therapies;

·

the prevalence and severity of any side effects;

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product labeling or product insert requirements of the FDA, EMA or other regulatory authorities, including any limitations or warnings contained in a product’s approved labeling;

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relative convenience and ease of administration;

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·

the strength of marketing and distribution support;

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the timing of market introduction of competitive products;

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publicity concerning our products or competing products and treatments; and

·

sufficient third‑party payor coverage and reimbursement.

Even if a potential product displays a favorable efficacy and safety profile in preclinical studies and clinical trials, market acceptance of the product will not be fully known until after it is launched.

Our gene therapy approach utilizes vectors derived from viruses, which may be perceived as unsafe or may result in unforeseen adverse events. Negative public opinion and increased regulatory scrutiny of gene therapy may damage public perception of the safety of our product candidates and adversely affect our ability to conduct our business or obtain regulatory approvals for our product candidates.

Gene therapy remains a novel technology, with no gene therapy product approved to date in the United States and only one gene therapy product approved to date in the European Union. Public perception may be influenced by claims that gene therapy is unsafe, and gene therapy may not gain the acceptance of the public or the medical community. In particular, our success will depend upon physicians who specialize in the treatment of genetic diseases targeted by our product candidates, prescribing treatments that involve the use of our product candidates in lieu of, or in addition to, existing treatments with which they are familiar and for which greater clinical data may be available. More restrictive government regulations or negative public opinion would have an adverse effect on our business, financial condition, results of operations and prospects and may delay or impair the development and commercialization of our product candidates or demand for any products we may develop. For example, earlier gene therapy trials led to several well‑publicized adverse events, including cases of leukemia and death seen in other trials using non-AAV vectors. Serious adverse events in our clinical trials, or other clinical trials involving gene therapy products or our competitors’ products, even if not ultimately attributable to the relevant product candidates, and the resulting publicity, could result in increased government regulation, unfavorable public perception, potential regulatory delays in the testing or approval of our product candidates, stricter labeling requirements for those product candidates that are approved and a decrease in demand for any such product candidates.

If we obtain approval to commercialize our product candidates outside of the United States, in particular in the European Union, a variety of risks associated with international operations could harm our business.

We expect that we will be subject to additional risks in commercializing our product candidates outside the United States, including:

·

different regulatory requirements for approval of drugs and biologics in foreign countries;

·

reduced protection for intellectual property rights;

·

unexpected changes in tariffs, trade barriers and regulatory requirements;

·

economic weakness, including inflation, or political instability in particular foreign economies and markets;

·

compliance with tax, employment, immigration and labor laws for employees living or traveling abroad;

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foreign currency fluctuations, which could result in increased operating expenses and reduced revenues, and other obligations incident to doing business in another country;

·

workforce uncertainty in countries where labor unrest is more common than in the United States;

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·

shortages resulting from any events affecting raw material supply or manufacturing capabilities abroad;

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business interruptions resulting from geopolitical actions, including war and terrorism or natural disasters including earthquakes, typhoons, floods and fires, or from economic or political instability; and

·

greater difficulty with enforcing our contracts in jurisdictions outside of the United States.

Further, in many foreign countries it is common for others to engage in business practices that are prohibited by U.S. laws and regulations applicable to us, including the Foreign Corrupt Practices Act. Although we expect to implement policies and procedures designed to comply with these laws and policies, there can be no assurance that our employees, contractors and agents will comply with these laws and policies. If we are unable to successfully manage the challenges of international expansion and operations, our business and operating results could be harmed.

Risks Related to Our Intellectual Property 

Our rights to develop and commercialize our product candidates are subject to, in part, the terms and conditions of licenses granted to us by others.

We are reliant upon licenses to certain patent rights and proprietary technology from third parties that are important or necessary to the development of our technology and products, including technology related to our manufacturing process and our product candidates. These and other licenses may not provide exclusive rights to use such intellectual property and technology in all relevant fields of use and in all territories in which we may wish to develop or commercialize our technology and products in the future. As a result, we may not be able to prevent competitors from developing and commercializing competitive products in territories included in all of our licenses.

In some circumstances, particularly in licenses with academic institutions, we may not have the right to control the preparation, filing and prosecution of patent applications, or to maintain the patents, covering technology that we license from third parties. Therefore, we cannot be certain that these patents and applications will be prosecuted, maintained and enforced in a manner consistent with the best interests of our business. If our licensors fail to maintain such patents, or lose rights to those patents or patent applications, the rights we have licensed may be reduced or eliminated and our right to develop and commercialize any of our products that are the subject of such licensed rights could be adversely affected. In addition to the foregoing, the risks associated with patent rights that we license from third parties will also apply to patent rights we may own in the future.

Further, in many of our license agreements we are responsible for bringing any actions against any third party for infringing on the patents we have licensed. Certain of our license agreements also require us to meet development thresholds to maintain the license, including establishing a set timeline for developing and commercializing products and minimum yearly diligence obligations in developing and commercializing the product. Disputes may arise regarding intellectual property subject to a licensing agreement, including:

·

the scope of rights granted under the license agreement and other interpretation‑related issues;

·

the extent to which our technology and processes infringe on intellectual property of the licensor that is not subject to the licensing agreement;

·

the sublicensing of patent and other rights under our collaborative development relationships;

·

our diligence obligations under the license agreement and what activities satisfy those diligence obligations;

·

the inventorship or ownership of inventions and know‑how resulting from the joint creation or use of intellectual property by our licensors and us and our partners; and

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·

the priority of invention of patented technology.

If disputes over intellectual property that we have licensed prevent or impair our ability to maintain our current licensing arrangements on acceptable terms, we may be unable to successfully develop and commercialize the affected product candidates.

If we fail to comply with our obligations under these license agreements, or we are subject to a bankruptcy, the licensor may have the right to terminate the license, in which event we would not be able to market products covered by the license.

Furthermore, the research resulting in certain of our licensed patent rights and technology was funded by the U.S. government. As a result, the government may have certain rights, or march‑in rights, to such patent rights and technology. When new technologies are developed with government funding, the government generally obtains certain rights in any resulting patents, including a non‑exclusive license authorizing the government to use the invention for non‑commercial purposes. These rights may permit the government to disclose our confidential information to third parties and to exercise march‑in rights to use or allow third parties to use our licensed technology. The government can exercise its march‑in rights if it determines that action is necessary because we fail to achieve practical application of the government‑funded technology, because action is necessary to alleviate health or safety needs, to meet requirements of federal regulations or to give preference to U.S. industry. In addition, our rights in such inventions may be subject to certain requirements to manufacture products embodying such inventions in the United States. Any exercise by the government of such rights could harm our competitive position, business, financial condition, results of operations and prospects.

If we are unable to obtain and maintain patent protection for our products and technology, or if the scope of the patent protection obtained is not sufficiently broad, our competitors could develop and commercialize products and technology similar or identical to ours, and our ability to successfully commercialize our products and technology may be adversely affected.

Our success depends, in large part, on our ability to obtain and maintain patent protection in the United States and other countries with respect to our proprietary product candidates and manufacturing technology. Our licensors have sought and we intend to seek to protect our proprietary position by filing patent applications in the United States and abroad related to many of our novel technologies and product candidates that are important to our business.

The patent prosecution process is expensive, time‑consuming and complex, and we may not be able to file, prosecute, maintain, enforce or license all necessary or desirable patent applications at a reasonable cost or in a timely manner. For example, in some cases, the work of certain academic researchers in the gene therapy field has entered the public domain, which may compromise our ability to obtain patent protection for certain inventions related to or building upon such prior work. Consequently, we will not be able to obtain any such patents to prevent others from using our technology for, and developing and marketing competing products to treat, these indications. It is also possible that we will fail to identify patentable aspects of our research and development output before it is too late to obtain patent protection.

The patent position of biotechnology and pharmaceutical companies generally is highly uncertain, involves complex legal and factual questions and has, in recent years, been the subject of much litigation. As a result, the issuance, scope, validity, enforceability and commercial value of our patent rights are highly uncertain. Our pending and future patent applications may not result in patents being issued which protect our technology or product candidates or which effectively prevent others from commercializing competitive technologies and product candidates. Changes in either the patent laws or interpretation of the patent laws in the United States and other countries may diminish the value of our patents or narrow the scope of our patent protection.

We may not be aware of all third‑party intellectual property rights potentially relating to our product candidates. Publications of discoveries in the scientific literature often lag the actual discoveries, and patent applications in the United States and other jurisdictions are typically not published until 18 months after filing or, in some cases, not at all.

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Therefore, we cannot be certain that we were the first to make the inventions claimed in any owned or any licensed patents or pending patent applications, or that we were the first to file for patent protection of such inventions.

Even if the patent applications we license or may own in the future do issue as patents, they may not issue in a form that will provide us with any meaningful protection, prevent competitors or other third parties from competing with us or otherwise provide us with any competitive advantage. Our competitors or other third parties may be able to circumvent our patents by developing similar or alternative technologies or products in a non‑infringing manner.

The issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability, and our patents may be challenged in the courts or patent offices in the United States and abroad. Such challenges may result in loss of exclusivity or in patent claims being narrowed, invalidated or held unenforceable, which could limit our ability to stop others from using or commercializing similar or identical technology and products, or limit the duration of the patent protection of our technology and product candidates. Given the amount of time required for the development, testing and regulatory review of new product candidates, patents protecting such candidates might expire before or shortly after such candidates are commercialized. As a result, our intellectual property may not provide us with sufficient rights to exclude others from commercializing products similar or identical to ours.

Our intellectual property licenses with third parties may be subject to disagreements over contract interpretation, which could narrow the scope of our rights to the relevant intellectual property or technology or increase our financial or other obligations to our licensors.

The agreements under which we currently license intellectual property or technology from third parties are complex, and certain provisions in such agreements may be susceptible to multiple interpretations. The resolution of any contract interpretation disagreement that may arise could narrow what we believe to be the scope of our rights to the relevant intellectual property or technology, or increase what we believe to be our financial or other obligations under the relevant agreement, either of which could harm our business, financial condition, results of operations and prospects.

We may not be successful in obtaining necessary rights to our product candidates through acquisitions and in‑licenses.

We currently have rights to certain intellectual property, through licenses from third parties, to develop our product candidates. Because our programs may require the use of proprietary rights held by third parties, the growth of our business likely will depend, in part, on our ability to acquire, in‑license or use these proprietary rights. We may be unable to acquire or in‑license any compositions, methods of use, processes or other intellectual property rights from third parties that we identify as necessary for our product candidates. The licensing or acquisition of third‑party intellectual property rights is a competitive area, and several more established companies may pursue strategies to license or acquire third‑party intellectual property rights that we may consider attractive. These established companies may have a competitive advantage over us due to their size, capital resources and greater clinical development and commercialization capabilities. In addition, companies that perceive us to be a competitor may be unwilling to assign or license rights to us. We also may be unable to license or acquire third‑party intellectual property rights on terms that would allow us to make an appropriate return on our investment.

We sometimes collaborate with non‑profit and academic institutions to accelerate our preclinical research or development under written agreements with these institutions. Typically, these institutions provide us with an option to negotiate a license to any of the institution’s rights in technology resulting from the collaboration. Regardless of such option, we may be unable to negotiate a license within the specified timeframe or under terms that are acceptable to us. If we are unable to do so, the institution may offer the intellectual property rights to other parties, potentially blocking our ability to pursue our program.

If we are unable to successfully obtain rights to required third‑party intellectual property rights or maintain the existing intellectual property rights we have, we may be required to expend significant time and resources to redesign our product candidates or the methods for manufacturing them or to develop or license replacement technology, all of which may not be feasible on a technical or commercial basis. If we are unable to do so, we may be unable to develop or commercialize the affected product candidates, which could harm our business significantly.

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Obtaining and maintaining our patent protection depends on compliance with various procedural, document submission, fee payment and other requirements imposed by government patent agencies, and our patent protection could be reduced or eliminated for non‑compliance with these requirements.

Periodic maintenance fees, renewal fees, annuity fees and various other government fees on patents and/or applications will be due to be paid to the United States Patent and Trademark Office, or USPTO, and various government patent agencies outside of the United States over the lifetime of our licensed patents and/or applications and any patent rights we may own in the future. We rely on our outside counsel or our licensing partners to pay these fees due to non‑U.S. patent agencies. The USPTO and various non‑U.S. government patent agencies require compliance with several procedural, documentary, fee payment and other similar provisions during the patent application process. We employ reputable law firms and other professionals to help us comply and we are also dependent on our licensors to take the necessary action to comply with these requirements with respect to our licensed intellectual property. In many cases, an inadvertent lapse can be cured by payment of a late fee or by other means in accordance with the applicable rules. There are situations, however, in which non‑compliance can result in abandonment or lapse of the patent or patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction. In such an event, potential competitors might be able to enter the market and this circumstance could harm our business.

We may not be able to protect our intellectual property rights throughout the world.

Filing, prosecuting and defending patents on product candidates in all countries throughout the world would be prohibitively expensive, and our intellectual property rights in some countries outside the United States could be less extensive than those in the United States. In addition, the laws of some foreign countries do not protect intellectual property rights to the same extent as federal and state laws in the United States. Consequently, we may not be able to prevent third parties from practicing our inventions in all countries outside the United States, or from selling or importing products made using our inventions in and into the United States or other jurisdictions. Competitors may use our technologies in jurisdictions where we have not obtained patent protection to develop their own products and, further, may export otherwise infringing products to territories where we have patent protection, but enforcement is not as strong as that in the United States. These products may compete with our products and our patents or other intellectual property rights may not be effective or sufficient to prevent them from competing.

Many companies have encountered significant problems in protecting and defending intellectual property rights in foreign jurisdictions. The legal systems of certain countries, particularly certain developing countries, do not favor the enforcement of patents, trade secrets and other intellectual property protection, particularly those relating to biotechnology products, which could make it difficult for us to stop the infringement of our patents or marketing of competing products in violation of our proprietary rights generally. For example, an April 2014 report from the Office of the United States Trade Representative identified a number of countries, including India and China, where challenges to the procurement and enforcement of patent rights have been reported. Several countries, including India and China, have been listed in the report every year since 1989. Proceedings to enforce our patent rights in foreign jurisdictions could result in substantial costs and divert our efforts and attention from other aspects of our business, could put our patents at risk of being invalidated or interpreted narrowly and our patent applications at risk of not issuing and could provoke third parties to assert claims against us. We may not prevail in any lawsuits that we initiate and the damages or other remedies awarded, if any, may not be commercially meaningful. Accordingly, our efforts to enforce our intellectual property rights around the world may be inadequate to obtain a significant commercial advantage from the intellectual property that we develop or license.

Issued patents covering our product candidates could be found invalid or unenforceable if challenged in court. We may not be able to protect our trade secrets in court.

If one of our licensing partners or we initiate legal proceedings against a third party to enforce a patent covering one of our product candidates, the defendant could counterclaim that the patent covering our product candidate is invalid or unenforceable. In patent litigation in the United States, defendant counterclaims alleging invalidity or unenforceability are commonplace. Grounds for a validity challenge could be an alleged failure to meet any of several statutory requirements, including lack of novelty, obviousness, lack of written description or non‑enablement. Grounds for an unenforceability assertion could be an allegation that someone connected with prosecution of the patent withheld

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information material to patentability from the USPTO, or made a misleading statement, during prosecution. Third parties also may raise similar claims before administrative bodies in the United States or abroad, even outside the context of litigation. Such mechanisms include re‑examination, post grant review, inter partes review and equivalent proceedings in foreign jurisdictions. Such proceedings could result in the revocation or cancellation of or amendment to our patents in such a way that they no longer cover our product candidates. The outcome following legal assertions of invalidity and unenforceability is unpredictable. With respect to the validity question, for example, we cannot be certain that there is no invalidating prior art, of which the patent examiner and we or our licensing partners were unaware during prosecution. If a defendant were to prevail on a legal assertion of invalidity or unenforceability, we could lose at least part, and perhaps all, of the patent protection on one or more of our product candidates. Such a loss of patent protection could harm our business.

In addition to the protection afforded by patents, we rely on trade secret protection and confidentiality agreements to protect proprietary know‑how that is not patentable or that we elect not to patent, processes for which patents are difficult to enforce and any other elements of our product candidate discovery and development processes that involve proprietary know‑how, information or technology that is not covered by patents. However, trade secrets can be difficult to protect and some courts inside and outside the United States are less willing or unwilling to protect trade secrets. We seek to protect our proprietary technology and processes, in part, by entering into confidentiality agreements with our employees, consultants, scientific advisors and contractors. We cannot guarantee that we have entered into such agreements with each party that may have or have had access to our trade secrets or proprietary technology and processes. We also seek to preserve the integrity and confidentiality of our data and trade secrets by maintaining physical security of our premises and physical and electronic security of our information technology systems. While we have confidence in these individuals, organizations and systems, agreements or security measures may be breached, and we may not have adequate remedies for any breach. In addition, our trade secrets may otherwise become known or be independently discovered by competitors.

Third parties may initiate legal proceedings alleging that we are infringing their intellectual property rights, the outcome of which would be uncertain and could harm our business.

Our commercial success depends upon our ability and the ability of our collaborators to develop, manufacture, market and sell our product candidates and use our proprietary technologies without infringing the proprietary rights and intellectual property of third parties. The biotechnology and pharmaceutical industries are characterized by extensive and complex litigation regarding patents and other intellectual property rights. We may in the future become party to, or be threatened with, adversarial proceedings or litigation regarding intellectual property rights with respect to our product candidates and technology, including interference proceedings, post grant review and inter partes review before the USPTO. Third parties may assert infringement claims against us based on existing patents or patents that may be granted in the future, regardless of their merit. There is a risk that third parties may choose to engage in litigation with us to enforce or to otherwise assert their patent rights against us. Even if we believe such claims are without merit, a court of competent jurisdiction could hold that these third‑party patents are valid, enforceable and infringed, which could adversely affect our ability to commercialize our product candidates or any other of our product candidates or technologies covered by the asserted third‑party patents. In order to successfully challenge the validity of any such U.S. patent in federal court, we would need to overcome a presumption of validity. As this burden is a high one requiring us to present clear and convincing evidence as to the invalidity of any such U.S. patent claim, there is no assurance that a court of competent jurisdiction would invalidate the claims of any such U.S. patent. If we are found to infringe a third party’s valid and enforceable intellectual property rights, we could be required to obtain a license from such third party to continue developing, manufacturing and marketing our product candidates and technology. However, we may not be able to obtain any required license on commercially reasonable terms or at all. Even if we were able to obtain a license, it could be non‑exclusive, thereby giving our competitors and other third parties access to the same technologies licensed to us, and it could require us to make substantial licensing and royalty payments. We could be forced, including by court order, to cease developing, manufacturing and commercializing the infringing technology or product candidates. In addition, we could be found liable for monetary damages, including treble damages and attorneys’ fees, if we are found to have willfully infringed a patent or other intellectual property right. A finding of infringement could prevent us from manufacturing and commercializing our product candidates or force us to cease some of our business operations, which could harm our business. Claims that we have misappropriated the confidential information or trade secrets of third parties could have a similar negative impact on our business, financial condition, results of operations and prospects.

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Intellectual property litigation could cause us to spend substantial resources and distract our personnel from their normal responsibilities.

Competitors may infringe our patents or the patents of our licensing partners, or we may be required to defend against claims of infringement. To counter infringement or unauthorized use claims or to defend against claims of infringement can be expensive and time consuming. Even if resolved in our favor, litigation or other legal proceedings relating to intellectual property claims may cause us to incur significant expenses, and could distract our technical and management personnel from their normal responsibilities. In addition, there could be public announcements of the results of hearings, motions or other interim proceedings or developments and if securities analysts or investors perceive these results to be negative, it could have a substantial adverse effect on the price of our common stock. Such litigation or proceedings could substantially increase our operating losses and reduce the resources available for development activities or any future sales, marketing or distribution activities. We may not have sufficient financial or other resources to adequately conduct such litigation or proceedings. Some of our competitors may be able to sustain the costs of such litigation or proceedings more effectively than we can because of their greater financial resources and more mature and developed intellectual property portfolios. Uncertainties resulting from the initiation and continuation of patent litigation or other proceedings could adversely affect our ability to compete in the marketplace.

We may be subject to claims asserting that our employees, consultants or advisors have wrongfully used or disclosed alleged trade secrets of their current or former employers or claims asserting ownership of what we regard as our own intellectual property.

Many of our employees, consultants or advisors are currently, or were previously, employed at universities or other biotechnology or pharmaceutical companies, including our competitors or potential competitors. Although we try to ensure that our employees, consultants and advisors do not use the proprietary information or know‑how of others in their work for us, we may be subject to claims that these individuals or we have used or disclosed intellectual property, including trade secrets or other proprietary information, of any such individual’s current or former employer. Litigation may be necessary to defend against these claims. If we fail in defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights or personnel. Even if we are successful in defending against such claims, litigation could result in substantial costs and be a distraction to management.

In addition, while it is our policy to require our employees and contractors who may be involved in the conception or development of intellectual property to execute agreements assigning such intellectual property to us, we may be unsuccessful in executing such an agreement with each party who, in fact, conceives or develops intellectual property that we regard as our own. The assignment of intellectual property rights may not be self‑executing or the assignment agreements may be breached, and we may be forced to bring claims against third parties, or defend claims that they may bring against us, to determine the ownership of what we regard as our intellectual property.

Changes in U.S. patent law could diminish the value of patents in general, thereby impairing our ability to protect our products.

Recent patent reform legislation could increase the uncertainties and costs surrounding the prosecution of patent applications and the enforcement or defense of issued patents. On September 16, 2011, the Leahy‑Smith America Invents Act, or the Leahy‑Smith Act, was signed into law. The Leahy‑Smith Act includes several significant changes to U.S. patent law. These include provisions that affect the way patent applications are prosecuted and also may affect patent litigation. These also include provisions that switched the United States from a “first‑to‑invent” system to a “first‑to‑file” system, allow third‑party submission of prior art to the USPTO during patent prosecution and set forth additional procedures to attack the validity of a patent by the USPTO administered post grant proceedings. Under a first‑to‑file system, assuming the other requirements for patentability are met, the first inventor to file a patent application generally will be entitled to the patent on an invention regardless of whether another inventor had made the invention earlier. The USPTO recently developed new regulations and procedures to govern administration of the Leahy‑Smith Act, and many of the substantive changes to patent law associated with the Leahy‑Smith Act, and in particular, the first to file provisions, only became effective on March 16, 2013. Accordingly, it is not clear what, if any, impact the Leahy‑Smith Act will have on the operation of our business. However, the Leahy‑Smith Act and its implementation could increase the uncertainties and costs surrounding the prosecution of our patent applications and the

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enforcement or defense of our issued patents, all of which could harm our business, financial condition, results of operations and prospects.

The patent positions of companies engaged in the development and commercialization of biologics and pharmaceuticals are particularly uncertain. Two cases involving diagnostic method claims and “gene patents” have recently been decided by the Supreme Court of the United States, or Supreme Court. On March 20, 2012, the Supreme Court issued a decision in Mayo Collaborative Services v. Prometheus Laboratories, Inc., or Prometheus, a case involving patent claims directed to a process of measuring a metabolic product in a patient to optimize a drug dosage for the patient. According to the Supreme Court, the addition of well‑understood, routine or conventional activity such as “administering” or “determining” steps was not enough to transform an otherwise patent‑ineligible natural phenomenon into patent‑eligible subject matter. On July 3, 2012, the USPTO issued a guidance memo to patent examiners indicating that process claims directed to a law of nature, a natural phenomenon or a naturally occurring relation or correlation that do not include additional elements or steps that integrate the natural principle into the claimed invention such that the natural principle is practically applied and the claim amounts to significantly more than the natural principle itself should be rejected as directed to not patent‑eligible subject matter. On June 13, 2013, the Supreme Court issued its decision in Association for Molecular Pathology v. Myriad Genetics, Inc., or Myriad, a case involving patent claims held by Myriad Genetics, Inc. relating to the breast cancer susceptibility genes BRCA1 and BRCA2. Myriad held that an isolated segment of naturally occurring DNA, such as the DNA constituting the BRCA1 and BRCA2 genes, is not patent eligible subject matter, but that complementary DNA, which is an artificial construct that may be created from RNA transcripts of genes, may be patent eligible.

On March 4, 2014, the USPTO issued a guidance memorandum to patent examiners titled 2014 Procedure For Subject Matter Eligibility Analysis Of Claims Reciting Or Involving Laws Of Nature/Natural Principles, Natural Phenomena, and/or Natural Products. These guidelines instruct USPTO examiners on the ramifications of the Prometheus and Myriad rulings and apply the Myriad ruling to natural products and principles including all naturally occurring nucleic acids. Patents for certain of our product candidates contain claims related to specific DNA sequences that are naturally occurring and, therefore, could be the subject of future challenges made by third parties. In addition, the recent USPTO guidance could make it impossible for us to pursue similar patent claims in patent applications we may prosecute in the future.

We cannot assure you that our efforts to seek patent protection for our technology and products will not be negatively impacted by the decisions described above, rulings in other cases or changes in guidance or procedures issued by the USPTO. We cannot fully predict what impact the Supreme Court’s decisions in Prometheus and Myriad may have on the ability of life science companies to obtain or enforce patents relating to their products and technologies in the future. These decisions, the guidance issued by the USPTO and rulings in other cases or changes in USPTO guidance or procedures could have an adverse effect on our existing patent portfolio and our ability to protect and enforce our intellectual property in the future.

Moreover, although the Supreme Court has held in Myriad that isolated segments of naturally occurring DNA are not patent‑eligible subject matter, certain third parties could allege that activities that we may undertake infringe other gene‑related patent claims, and we may deem it necessary to defend ourselves against these claims by asserting non‑infringement and/or invalidity positions, or paying to obtain a license to these claims. In any of the foregoing or in other situations involving third‑party intellectual property rights, if we are unsuccessful in defending against claims of patent infringement, we could be forced to pay damages or be subjected to an injunction that would prevent us from utilizing the patented subject matter. Such outcomes could harm our business, financial condition, results of operations or prospects.

Outside the United States, other courts have also begun to address the patenting of genetic material. In August 2015, the Australian High Court ruled that isolated genes cannot be patented in Australia. The decision did not address methods of using genetic material.  Any ruling of a similar scope in other countries could affect the scope of our intellectual property rights.

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If we do not obtain patent term extension and data exclusivity for our product candidates, our business may be harmed.

Depending upon the timing, duration and specifics of any FDA marketing approval of our product candidates, one or more of our U.S. patents may be eligible for limited patent term extension under the Drug Price Competition and Patent Term Restoration Act of 1984, or Hatch‑Waxman Amendments. The Hatch‑Waxman Amendments permit a patent extension term of up to five years as compensation for patent term lost during the FDA regulatory review process. A patent term extension cannot extend the remaining term of a patent beyond a total of 14 years from the date of product approval, only one patent may be extended and only those claims covering the approved drug, a method for using it or a method for manufacturing it may be extended. However, we may not be granted an extension because of, for example, failing to exercise due diligence during the testing phase or regulatory review process, failing to apply within applicable deadlines, failing to apply prior to expiration of relevant patents or otherwise failing to satisfy applicable requirements. Moreover, the applicable time period or the scope of patent protection afforded could be less than we request. If we are unable to obtain patent term extension or the term of any such extension is less than we request, our competitors may obtain approval of competing products following our patent expiration, and our revenue could be reduced.

If our trademarks and trade names are not adequately protected, then we may not be able to build name recognition in our markets of interest and our business may be adversely affected.

We have registered trademarks with the USPTO for the mark “Voyager Therapeutics” and the Voyager logo. Our trademarks or trade names may be challenged, infringed, circumvented or declared generic or determined to be infringing on other marks. We may not be able to protect our rights to these trademarks and trade names, which we need to build name recognition among potential partners or customers in our markets of interest. At times, competitors may adopt trade names or trademarks similar to ours, thereby impeding our ability to build brand identity and possibly leading to market confusion. In addition, there could be potential trade name or trademark infringement claims brought by owners of other registered trademarks or trademarks that incorporate variations of our registered or unregistered trademarks or trade names. Over the long term, if we are unable to establish name recognition based on our trademarks and trade names, then we may not be able to compete effectively and our business may be adversely affected. Our efforts to enforce or protect our proprietary rights related to trademarks, trade secrets, domain names, copyrights or other intellectual property may be ineffective and could result in substantial costs and diversion of resources and could adversely impact our financial condition or results of operations.

Intellectual property rights do not necessarily address all potential threats.

The degree of future protection afforded by our intellectual property rights is uncertain because intellectual property rights have limitations, and may not adequately protect our business or permit us to maintain our competitive advantage. For example:

·

others may be able to make gene therapy products that are similar to our product candidates but that are not covered by the claims of the patents that we license or may own in the future;

·

we, or our license partners or current or future collaborators, might not have been the first to make the inventions covered by the issued patent or pending patent application that we license or may own in the future;

·

we, or our license partners or current or future collaborators, might not have been the first to file patent applications covering certain of our or their inventions;

·

others may independently develop similar or alternative technologies or duplicate any of our technologies without infringing our owned or licensed intellectual property rights;

·

it is possible that our pending patent applications or those that we may own in the future will not lead to issued patents;

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·

issued patents that we hold rights to may be held invalid or unenforceable, including as a result of legal challenges by our competitors;

·

our competitors might conduct research and development activities in countries where we do not have patent rights and then use the information learned from such activities to develop competitive products for sale in our major commercial markets;

·

we may not develop additional proprietary technologies that are patentable;

·

the patents of others may have an adverse effect on our business; and

·

we may choose not to file a patent for certain trade secrets or know‑how, and a third party may subsequently file a patent covering such intellectual property.

Should any of these events occur, they could significantly harm our business, financial condition, results of operations and prospects.

Our reliance on third parties requires us to share our trade secrets, which increases the possibility that a competitor will discover them or that our trade secrets will be misappropriated or disclosed.

Because we currently rely on certain third parties to manufacture all or part of our product candidates and to perform quality testing, and because we collaborate with various organizations and academic institutions for the advancement of our product engine and pipeline, we must, at times, share our proprietary technology and confidential information, including trade secrets, with them. We seek to protect our proprietary technology, in part, by entering into confidentiality agreements and, if applicable, material transfer agreements, collaborative research agreements, consulting agreements or other similar agreements with our collaborators, advisors, employees and consultants prior to beginning research or disclosing proprietary information. These agreements typically limit the rights of the third parties to use or disclose our confidential information. Despite the contractual provisions employed when working with third parties, the need to share trade secrets and other confidential information increases the risk that such trade secrets become known by our competitors, are inadvertently incorporated into the technology of others or are disclosed or used in violation of these agreements. Given that our proprietary position is based, in part, on our know‑how and trade secrets, a competitor’s discovery of our proprietary technology and confidential information or other unauthorized use or disclosure would impair our competitive position and may harm our business, financial condition, results of operations and prospects.

Despite our efforts to protect our trade secrets, our competitors may discover our trade secrets, either through breach of these agreements, independent development or publication of information including our trade secrets by third parties. A competitor’s discovery of our trade secrets would impair our competitive position and have an adverse impact on our business, financial condition, results of operations and prospects.

Risks Related to Ownership of Our Common Stock

Our executive officers, directors, principal stockholders and their affiliates exercise significant influence over our company.

The holdings of our executive officers, directors, principal stockholders and their affiliates, including investment funds affiliated with Third Rock Ventures and Funds affiliated with Fidelity Management Research Company, or Fidelity, represent beneficial ownership, in the aggregate, of approximately 62% of our outstanding common stock as of December 31, 2016. As a result, these stockholders, if they act together, will be able to influence our management and affairs and the outcome of matters submitted to our stockholders for approval, including the election of directors and any sale, merger, consolidation, or sale of all or substantially all of our assets. In addition, this concentration of ownership might adversely affect the market price of our common stock by:

·

delaying, deferring or preventing a change of control of us;

·

impeding a merger, consolidation, takeover or other business combination involving us; or

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·

discouraging a potential acquirer from making a tender offer or otherwise attempting to obtain control of us.

If securities analysts do not publish research or reports about our business or if they publish negative evaluations of our stock, the price of our stock could decline. 

The trading market for our common stock will rely in part on the research and reports that industry or financial analysts publish about us or our business. If no or few analysts maintain coverage of us, the trading price of our stock would likely decrease. If one or more of the analysts covering our business downgrade their evaluations of our stock, the price of our stock could decline. If one or more of these analysts cease to cover our stock, we could lose visibility in the market for our stock, which in turn could cause our stock price to decline. 

Future sales of our common stock may cause our stock price to decline. 

Sales of a substantial number of shares of our common stock in the public market or the perception that these sales might occur could significantly reduce the market price of our common stock and impair our ability to raise adequate capital through the sale of additional equity securities.

In addition, we have registered on a registration statement on Form S-3 that has been declared effective, the sale of up to $250.0 million in aggregate of an indeterminate number of shares of common stock and preferred stock, an indeterminate principal amount of debt securities, and an indeterminate number of warrants. The registration statement also registers the offering, issuance, and sale of common stock having up to a maximum aggregate offering price of $75.0 million that we may issue and sell in an at-the-market offering under a sales agreement we entered into with Cowen and Company, LLC on December 1, 2016 pursuant to a sales agreement prospectus that forms a part of the registration statement. As of December 31, 2016, approximately $75.0 million in shares of common stock remain for sale under the sales agreement.

The price of our common stock is volatile and fluctuates substantially, which could result in substantial losses for purchasers of our common stock.

The price of our common stock is likely to be volatile and fluctuates substantially. Since our stock began trading on the NASDAQ Global Select Market on November 11, 2015, through December 31, 2016, the closing price of our common stock ranged from a high of $30.20 to a low of $8.56. The stock market in general, and the market for biopharmaceutical companies in particular, has experienced extreme volatility that has often been unrelated to the operating performance of particular companies. The market price for our common stock may be influenced by many factors, including:

·

regulatory action and results of clinical trials of our product candidates or those of our competitors;

·

the success of competitive products or technologies;

·

commencement or termination of collaborations;

·

regulatory or legal developments in the United States and other countries;

·

developments or disputes concerning patent applications, issued patents or other proprietary rights;

·

the recruitment or departure of key personnel;

·

the level of expenses related to any of our product candidates or clinical development programs;

·

the results of our efforts to discover, develop, acquire or in‑license additional product candidates;

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·

actual or anticipated changes in estimates as to financial results, development timelines or recommendations by securities analysts;

·

variations in our financial results or those of companies that are perceived to be similar to us;

·

changes in the structure of healthcare payment systems;

·

market conditions in the pharmaceutical and biotechnology sectors;

·

general economic, industry and market conditions; and

·

the other factors described in the section titled “Risk Factors” and elsewhere in this Annual Report.

If our quarterly operating results fall below the expectations of investors or securities analysts, the price of our common stock could decline substantially. Furthermore, any quarterly fluctuations in our operating results may, in turn, cause the price of our stock to fluctuate substantially. We believe that quarterly comparisons of our financial results are not necessarily meaningful and should not be relied upon as an indication of our future performance.

In the past, following periods of volatility in the market price of a company’s securities, securities class‑action litigation often has been instituted against that company. Such litigation, if instituted against us, could cause us to incur substantial costs to defend such claims and divert management’s attention and resources, which could seriously harm our business, financial condition, results of operations and prospects.

We have broad discretion in how we use the proceeds from our IPO and may not use these proceeds effectively, which could affect our results of operations and cause our stock price to decline. 

We will have considerable discretion in the application of the net proceeds from our recently completed IPO.  As a result, investors will be relying upon management’s judgment with only limited information about our specific intentions for the use of the balance of the net proceeds from our IPO. We may use the net proceeds for purposes that do not yield a significant return or any return at all for our stockholders. In addition, pending their use, we may invest the net proceeds from this the IPO in a manner that does not produce income or that loses value. 

We are an “emerging growth company,” and the reduced disclosure requirements applicable to emerging growth companies may make our common stock less attractive to investors.

For so long as we remain an “emerging growth company,” or EGC, as defined in the JOBS Act, we are permitted and intend to rely on exemptions from certain disclosure requirements that are applicable to other public companies that are not EGCs. These exemptions include:

·

not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes‑Oxley Act of 2002;

·

not being required to comply with any requirement that may be adopted by the Public Company Accounting Oversight Board regarding mandatory audit firm rotation or a supplement to the auditor’s report providing additional information about the audit and the financial statements;

·

reduced disclosure obligations regarding executive compensation; and

·

exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved.

We may take advantages of these exemptions until we are no longer an EGC. We would cease to be an EGC upon the earlier of: (i) the last day of the fiscal year in which we have total annual gross revenue of $1.0 billion or more; (ii) the last day of the fiscal year following the fifth anniversary of the date of the completion of our IPO; (iii) the date on which we have issued more than $1.0 billion in nonconvertible debt during the previous three years; or (iv) the date on which we are deemed to be a large accelerated filer under the rules of the Securities and Exchange Commission or SEC,

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which means the first day of the year following the first year in which the market value of our common stock that is held by non‑affiliates exceeds $700.0 million as of June 30th.

We may choose to take advantage of some, but not all, of the available exemptions. In particular, we have not included all of the executive compensation information that would be required if we were not an EGC. We cannot predict whether investors will find our common stock less attractive if we rely on certain or all of these exemptions.

In addition, the JOBS Act provides that an EGC may take advantage of an extended transition period for complying with new or revised accounting standards. This allows an EGC to delay the adoption of certain accounting standards until those standards would otherwise apply to private companies. We have irrevocably elected not to avail ourselves of this exemption from new or revised accounting standards and, therefore, we will be subject to the same new or revised accounting standards as other public companies that are not emerging growth companies. If some investors find our common stock less attractive as a result, there may be a less active trading market for our common stock and our stock price may be more volatile and may decline.

We will incur increased costs as a result of operating as a public company, and our management will be required to devote substantial time to new compliance initiatives.

As a public company, and particularly after we are no longer an EGC, we will incur significant legal, accounting and other expenses that we did not incur as a private company. In addition, the Sarbanes‑Oxley Act of 2002 and rules subsequently implemented by the SEC and The NASDAQ Stock Market have imposed various requirements on public companies, including establishment and maintenance of effective disclosure and financial controls and corporate governance practices. Our management and other personnel will need to devote a substantial amount of time to these compliance initiatives. Moreover, these rules and regulations will increase our legal and financial compliance costs and will make some activities more time‑consuming and costly. For example, we expect that these rules and regulations may make it more difficult and more expensive for us to obtain director and officer liability insurance, and we may be required to accept reduced policy limits and coverage or incur substantially higher costs to obtain the same or similar coverage. As a result, it may be more difficult for us to attract and retain qualified people to serve on our board of directors, our board committees or as executive officers.

Pursuant to Section 404 of the Sarbanes‑Oxley Act of 2002, or Section 404, we will be required to furnish a report by our management on our internal control over financial reporting. However, while we remain an EGC, we will not be required to include an attestation report on internal control over financial reporting issued by our independent registered public accounting firm. To achieve compliance with Section 404 within the prescribed period, we will be engaged in a process to document and evaluate our internal control over financial reporting, which is both costly and challenging. In this regard, we will need to continue to dedicate internal resources, potentially engage outside consultants and adopt a detailed work plan to assess and document the adequacy of internal control over financial reporting, continue steps to improve control processes as appropriate, validate through testing that controls are functioning as documented and implement a continuous reporting and improvement process for internal control over financial reporting. Despite our efforts, there is a risk that neither we nor our independent registered public accounting firm will be able to conclude within the prescribed timeframe that our internal control over financial reporting is effective as required by Section 404. This could result in an adverse reaction in the financial markets due to a loss of confidence in the reliability of our financial statements.

Provisions in our amended and restated certificate of incorporation and bylaws and Delaware law could make an acquisition of us, which may be beneficial to our stockholders, more difficult and may prevent attempts by our stockholders to replace or remove our current management.

Provisions in our amended and restated certificate of incorporation and bylaws may discourage, delay or prevent a merger, acquisition or other change in control of us that stockholders may consider favorable, including transactions in which you might otherwise receive a premium for your shares. These provisions also could limit the price that investors might be willing to pay in the future for shares of our common stock, thereby depressing the market price of our common stock. In addition, because our board of directors is responsible for appointing the members of our management team, these provisions may frustrate or prevent any attempts by our stockholders to replace or remove our

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current management by making it more difficult for stockholders to replace members of our board of directors. Among other things, these provisions:

·

establish a classified board of directors such that not all members of the board are elected at one time;

·

allow the authorized number of our directors to be changed only by resolution of our board of directors;

·

limit the manner in which stockholders can remove directors from the board;

·

establish advance notice requirements for stockholder proposals that can be acted on at stockholder meetings and nominations to our board of directors;

·

require that stockholder actions must be effected at a duly called stockholder meeting and prohibit actions by our stockholders by written consent;

·

limit who may call stockholder meetings;

·

authorize our board of directors to issue preferred stock without stockholder approval, which could be used to institute a stockholder rights plan, or so‑called “poison pill,” that would work to dilute the stock ownership of a potential hostile acquirer, effectively preventing acquisitions that have not been approved by our board of directors; and

·

require the approval of the holders of at least 75% of the votes that all our stockholders would be entitled to cast to amend or repeal certain provisions of our amended and restated certificate of incorporation or bylaws.

Moreover, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law, which prohibits a person who owns in excess of 15% of our outstanding voting stock from merging or combining with us for a period of three years after the date of the transaction in which the person acquired in excess of 15% of our outstanding voting stock, unless the merger or combination is approved in a prescribed manner.

Our amended and restated certificate of incorporation designates the Court of Chancery of the State of Delaware as the sole and exclusive forum for certain types of actions and proceedings that may be initiated by our stockholders, which could limit our stockholders’ ability to obtain a favorable judicial forum for disputes with us or our directors, officers or employees.

Our amended and restated certificate of incorporation, provides that, unless we consent in writing to an alternative forum, the Court of Chancery of the State of Delaware will be the sole and exclusive forum for (i) any derivative action or proceeding brought on our behalf, (ii) any action asserting a claim of breach of a fiduciary duty owed by any of our directors, officers and employees to us or our stockholders, (iii) any action asserting a claim arising pursuant to any provision of the Delaware General Corporation Law, our certificate of incorporation or our bylaws or (iv) any action asserting a claim that is governed by the internal affairs doctrine, in each case subject to the Court of Chancery having personal jurisdiction over the indispensable parties named as defendants therein. Any person purchasing or otherwise acquiring any interest in any shares of our capital stock shall be deemed to have notice of and to have consented to this provision of our amended and restated certificate of incorporation. This choice of forum provision may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or our directors, officers or employees, which may discourage such lawsuits against us and our directors, officers and employees even though an action, if successful, might benefit our stockholders. Stockholders who do bring a claim in the Court of Chancery could face additional litigation costs in pursuing any such claim, particularly if they do not reside in or near the State of Delaware. The Court of Chancery may also reach different judgments or results than would other courts, including courts where a stockholder considering an action may be located or would otherwise choose to bring the action, and such judgments or results may be more favorable to us than to our stockholders. Alternatively, if a court were to find this provision of our amended and restated certificate of incorporation inapplicable to, or unenforceable in

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respect of, one or more of the specified types of actions or proceedings, we may incur additional costs which could have a material adverse effect on our business, financial condition or results of operations.

Because we do not anticipate paying any cash dividends on our capital stock in the foreseeable future, capital appreciation, if any, will be your sole source of gain.

We have never declared or paid cash dividends on our capital stock. We currently intend to retain all of our future earnings, if any, to finance the growth and development of our business. In addition, the terms of any future debt agreements may preclude us from paying dividends. As a result, capital appreciation, if any, of our common stock will be your sole source of gain for the foreseeable future.

ITEM 1B.        UNRESOLVED STAFF COMMENTS

Not applicable.

 

ITEM 2.        PROPERTIES

Our corporate headquarters are located in Cambridge, Massachusetts. Our current leased facility encompasses approximately 19,000 square feet of office and laboratory space, located at 75 Sidney Street, Cambridge, Massachusetts. In January 2016, we signed an amendment to extend the current lease through December 31, 2024.  In January 2016, we also signed a non-cancelable lease for an additional approximately 26,000 square feet in Cambridge, Massachusetts that is intended to support our continued growth. The additional facility includes laboratory and office space, and was ready for occupancy in early 2017.

 

ITEM 3.        LEGAL PROCEEDINGS

In the ordinary course of business, we are from time to time involved in lawsuits, claims, investigations, proceedings, and threats of litigation relating to intellectual property, commercial arrangements and other matters. While the outcome of these proceedings and claims cannot be predicted with certainty, as of December 31, 2016, we were not party to any legal or arbitration proceedings that may have, or have had in the recent past, significant effects on our financial position or profitability. No governmental proceedings are pending or, to our knowledge, contemplated against us. We are not a party to any material proceedings in which any director, member of senior management or affiliate of ours is either a party adverse to us or our subsidiaries or has a material interest adverse to us or our subsidiaries.

ITEM 4.        MINE SAFETY DISCLOSURES

Not applicable.

 

PART II

 

ITEM 5.        MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES.

Our common stock has been traded on the Nasdaq Global Select Market under the symbol “VYGR” since November 11, 2015. Prior to this time, there was no public market for our common stock. The following table shows the high and low sale prices per share of our common stock as reported on the Nasdaq Global Select Market for the periods indicated:

 

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Year ended December 31, 2016

    

High

    

Low

 

2015

 

 

 

 

 

 

 

Fourth Quarter (from November 11, 2015)

 

$

30.20

 

$

17.50

 

2016

 

 

 

 

 

 

 

First Quarter 2016

 

$

21.15

 

$

8.56

 

Second Quarter 2016

 

$

15.19

 

$

8.77

 

Third Quarter 2016

 

$

16.26

 

$

10.94

 

Fourth Quarter 2016

 

$

15.02

 

$

11.01

 

 

On  March 10, 2017, the last reported sale price for our common stock on the Nasdaq Global Select Market was $12.28 per share. 

 

Stock Performance Graph

The graph set forth below compares the cumulative total stockholder return on our common stock between November 11, 2015 and December 31, 2016, with the cumulative total return of (a) the NASDAQ Composite Index and (b) the NASDAQ Biotechnology Index, over the same period. This graph assumes the investment of $100 on November 11, 2015 in our common stock, the NASDAQ Composite Index, and the NASDAQ Biotechnology Index and assumes the reinvestment of dividends, if any. The graph assumes our closing sales price on November 11, 2015 of $17.75 per share as the initial value of our common stock and not the initial offering price to the public of $14.00 per share.

 

The comparisons shown in the graph below are based upon historical data. We caution that the stock price performance shown in the graph below is not necessarily indicative of, nor is it intended to forecast, the potential future performance of our common stock. Information used in the graph was obtained from the NASDAQ Stock Market LLC, a financial data provider and a source believed to be reliable. The NASDAQ Stock Market LLC is not responsible for any errors or omissions in such information.

 

Picture 17

 

Stockholders

As of March 10, 2017, there were approximately 34 holders of record of our common stock. The actual number of stockholders is greater than this number of record holders, and includes stockholders who are beneficial owners, but whose shares are held in street name by brokers and other nominees. This number of holders of record also does not include stockholders whose shares may be held in trust by other entities.

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Dividends

We have not paid any cash dividends on our common stock since inception and do not anticipate paying cash dividends in the foreseeable future.

Securities authorized for issuance under equity compensation plans

Information about our equity compensation plans is incorporated herein by reference to Item 12 of Part III of this Annual Report on Form 10-K.

 

Unregistered Sales of Equity Securities

We had no unregistered sales of securities for the year ended December 31, 2016.  

Purchases of Equity Securities by the Issuer or Affiliated Purchasers 

There were no repurchases of shares of common stock made during the year ended December 31, 2016.  

ITEM 6.         SELECTED FINANCIAL DATA

 

The following financial data should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations”, the financial statements and related notes, and other financial information included in this Annual Report on Form 10-K.

 

We have derived the statements of operations data for the years ended December 31, 2016, 2015,  and 2014, and the balance sheet data as of December 31, 2016 and 2015, from our audited financial statements included elsewhere in this Annual Report on Form 10-K. We have derived the statements of operations data for the period ended December 31, 2013, and the balance sheet data as of December 31, 2014 and 2013, from our audited consolidated financial statements not included in this Annual Report on Form 10-K. Historical results are not necessarily indicative of the results to be expected in future periods.

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Period from

 

 

 

 

 

 

 

 

 

 

 

 

June 19, 2013

 

 

 

 

 

 

 

 

 

 

 

 

(Inception) to

 

 

 

Year ended December 31, 

 

December 31, 

 

 

 

2016

 

2015

    

2014

    

2013

 

 

 

(in thousands, except for per share data)

 

Consolidated statements of operations data:

 

 

 

 

 

 

 

 

 

 

 

 

 

Collaboration revenue

 

$

14,220

 

$

17,334

 

$

 —

 

$

 —

 

Operating expenses:

 

 

 

 

 

 

 

 

 

 

 

 

 

Research and development

 

 

42,249

 

 

27,679

 

 

8,898

 

 

2,316

 

General and administrative

 

 

13,270

 

 

9,909

 

 

5,469

 

 

1,450

 

Total operating expenses

 

 

55,519

 

 

37,588

 

 

14,367

 

 

3,766

 

Loss from operations

 

 

(41,299)

 

 

(20,254)

 

 

(14,367)

 

 

(3,766)

 

Interest income (expense), net

 

 

976

 

 

332

 

 

(1)

 

 

(67)

 

Other income (expense), net

 

 

182

 

 

(9,750)

 

 

(1,949)

 

 

 —

 

Loss before income taxes

 

 

(40,141)

 

 

(29,672)

 

 

(16,317)

 

 

(3,833)

 

Income tax provision

 

 

52

 

 

 —

 

 

 —

 

 

 —

 

Net loss

 

$

(40,193)

 

$

(29,672)

 

$

(16,317)

 

$

(3,833)

 

Other comprehensive loss

 

 

 

 

 

 

 

 

 

 

 

 

 

Net unrealized gain (loss) on available-for-sale-securities, net