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MeiraGTx Holdings plc

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FY2020 Annual Report · MeiraGTx Holdings plc
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 2020
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: 001-38520

MEIRAGTX HOLDINGS PLC

(Exact name of registrant as specified in its charter)

Cayman Islands
(State or other jurisdiction of
incorporation or organization)

450 East 29th Street, 14th Floor
New York, NY
(Address of principal executive offices)

98-1448305
(I.R.S. Employer
Identification No.)

10016
(Zip Code)

(646) 860-7985
(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class
Ordinary Shares, $0.00003881 par value per share

Trading Symbol(s)
MGTX

Name of exchange on which registered
The Nasdaq Global Select Market

Securities registered pursuant to Section 12(g) of the Act: None

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 Exchange 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 every Interactive Data File required to be submitted 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 such files). Yes ☒ No ☐

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

Large accelerated filer
Non-accelerated filer

☐
☒

Accelerated filer
Smaller reporting company
Emerging growth company

☐
☒
☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards
provided pursuant to Section 13(a) of the Exchange Act. ☐
Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) 
of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.  ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒
As of June 30, 2020, the last business day of the registrant's most recently completed second fiscal quarter, the aggregate market value of the registrant’s ordinary shares held by non-affiliates of the
registrant was approximately $284,754,241 (based upon the closing sale price of the registrant’s ordinary shares on that date on the Nasdaq Global Select Market).

As of March 8, 2021, the registrant had 44,264,150 ordinary shares outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive Proxy Statement relating to its 2021 annual shareholder meeting to be filed with the SEC within 120 days after the end of the fiscal year ended

December 31, 2020 are incorporated herein by reference in Part III of this Annual Report on Form 10-K.

Table of Contents

PART I

CONTENTS

Business

Item 1.
Item 1A. Risk Factors
Item 1B. Unresolved Staff Comments
Item 2.
Item 3.
Item 4.

Properties
Legal Proceedings
Mine Safety Disclosures

PART II

Item 5.

Market For Registrant’s Common Equity, Related Stockholder Matters And Issuer Purchases Of
Equity Securities
Selected Financial Data
Management’s Discussion And Analysis Of Financial Condition And Results Of Operations

Item 6.
Item 7.
Item 7A. Quantitative And Qualitative Disclosures About Market Risk
Item 8.
Item 9.
Item 9A. Controls And Procedures
Item 9B. Other Information

Financial Statements And Supplementary Data
Changes In And Disagreements With Accountants On Accounting And Financial Disclosure

PART III

Item 10. Directors, Executive Officers And Corporate Governance
Item 11.
Item 12.

Executive Compensation
Security Ownership Of Certain Beneficial Owners And Management And Related Stockholder
Matters

Item 13. Certain Relationships And Related Transactions, And Director Independence
Item 14.

Principal Accountant Fees And Services

PART IV

Item 15.
Item 16.

Exhibits and Financial Statement Schedules
Form 10-K Summary

Page
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F-1
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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K (the “Form 10-K”) contains forward-looking statements that can involve substantial
risks and uncertainties. All statements other than statements of historical facts contained in this Form 10-K, including
statements regarding our future results of operations and financial position, business strategy, prospective products,
product approvals, research and development costs, future revenue, timing and likelihood of success, plans and objectives
of management for future operations, future results of anticipated products and prospects, plans and objectives of
management 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.

In some cases, you can identify forward-looking statements by terms such as “may,” “will,” “should,” “expect,” “plan,”
“anticipate,” “could,” “intend,” “target,” “project,” “contemplate,” “believe,” “estimate,” “predict,” “potential,”
“would” or “continue” or the negative of these terms or other similar expressions. The forward-looking statements in this
Form 10-K are only predictions. We have based these forward-looking statements largely on our current expectations and
projections about future events and financial trends that we believe may affect our business, financial condition and results
of operations. These forward-looking statements speak only as of the date of this Form 10-K and are subject to a number of
risks, uncertainties and assumptions described under the sections in this Form 10-K entitled “Item 1A. Risk Factors” and
“Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” and elsewhere in this
Form 10-K. Because forward-looking statements are inherently subject to risks and uncertainties, some of which cannot be
predicted or quantified and some of which are beyond our control, you should not rely on these forward-looking statements
as predictions of future events. The events and circumstances reflected in our forward-looking statements may not be
achieved or occur and actual results could differ materially from those projected in the forward-looking statements.
Moreover, we operate in an evolving environment. New risk factors and uncertainties may emerge from time to time, and it
is not possible for management to predict all risk factors and uncertainties. Except as required by applicable law, we do
not plan to publicly update or revise any forward-looking statements contained herein, whether as a result of any new
information, future events, changed circumstances or otherwise. Thus, one should not assume that our silence over time
means that actual events are bearing out as expressed or implied in such forward-looking statements.

You should read this Form 10-K and the documents that we reference in this Form 10-K and have filed as exhibits to this
Form 10-K, completely and with the understanding that our actual future results may be materially different from what we
expect.

In addition, statements that “we believe” and similar statements reflect our beliefs and opinions on the relevant subject.
These statements are based upon information available to us as of the date of this Form 10-K, and while we believe such
information forms a reasonable basis for such statements, such information may be limited or incomplete, and our
statements should not be read to indicate that we have conducted an exhaustive inquiry into, or review of, all relevant
information. These statements are inherently uncertain and investors are cautioned not to unduly rely upon these
statements. These statements should not be relied upon as representing our views as of any date subsequent to the date of
this Form 10-K.

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RISK FACTOR SUMMARY

We  are  providing  the  following  summary  of  the  principal  risk  factors  contained  in  this  Form  10-K  to  enhance  the
readability and accessibility of our risk factor disclosures. We encourage you to carefully review in their entirety the full
risk  factors  set  forth  in  the  section  of  this  Form  10-K  captioned  “Item  1A.  Risk  Factors”  for  additional  information
regarding  the  material  factors  that  make  an  investment  in  our  ordinary  shares  speculative  or  risky.  These  risks  and
uncertainties include, among others, the following:

• We have incurred significant losses since inception and anticipate that we will incur continued losses for the

foreseeable future, and may never achieve or maintain profitability.

• We will require additional capital to fund our operations, which may not be available on acceptable terms, if

at all.

• We are heavily dependent on the success of our Most Advanced Product Candidates (as defined in “Item 1A.
Risk  Factors”),  which  are  still  in  development,  and  if  none  of  them  receive  regulatory  approval  or  are
successfully commercialized, our business may be harmed.

•

The outbreak of the novel coronavirus disease, COVID-19, or other pandemic, epidemic or outbreak of an
infectious  disease  may  materially  and  adversely  impact  our  business,  including  our  preclinical  studies  and
clinical trials.

• We  intend  to  identify  and  develop  product  candidates  based  on  our  novel  gene  therapy  platform,  which
makes  it  difficult  to  predict  the  time  and  cost  of  product  candidate  development.  Very  few  gene  therapies
have been approved in the United States or in Europe.

•

•

•

Because  gene  therapy  is  novel  and  the  regulatory  landscape  that  governs  any  product  candidates  we  may
develop is uncertain and may change, we cannot predict the time and cost of obtaining regulatory approval, if
we receive it at all, for any product candidates we may develop.

Clinical  trials  are  expensive,  time-consuming,  difficult  to  design  and  implement,  and  involve  an  uncertain
outcome. Further, we may encounter substantial delays in our clinical trials.

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.

• We  and  our  contract  manufacturers  for  plasmid  are  subject  to  significant  regulation  with  respect  to
manufacturing our products. Our manufacturing facilities and the third-party manufacturing facilities which
we rely on may not continue to meet regulatory requirements and have limited capacity.

•

Enacted  and  future  healthcare  legislation  may  increase  the  difficulty  and  cost  for  us  to  obtain  marketing
approval of and commercialize our product candidates and may affect the prices we may set.

• We are subject to government regulation and other legal obligations relating to privacy and data protection.
Compliance  with  these  requirements  is  complex  and  costly.  Failure  to  comply  could  materially  harm  our
business.

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

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• We depend on proprietary technology licensed from others. If we lose our existing licenses or are unable to
acquire or license additional proprietary rights from third parties, we may not be able to continue developing
our product candidates.

•

If we are unable to obtain and maintain patent protection for our technology and product candidates or if the
scope of the patent protection obtained is not sufficiently broad, we may not be able to compete effectively in
our markets.

• We will need to expand our organization, and we may experience difficulties in managing this growth, which

could disrupt our operations.

•

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

BASIS OF PRESENTATION

Unless the context otherwise requires, references in this Form 10-K to “Meira,” “MeiraGTx,” “we,” “us”, “our” or “the
Company” refer to MeiraGTx Holdings plc and its subsidiaries.

We have proprietary rights to trademarks, trade names and service marks appearing in this Form 10-K that are important to
our business. Solely for convenience, the trademarks, trade names and service marks may appear in this Form 10-K
without the ® and TM symbols, but any such references are not intended to indicate, in any way, that we forgo or will not
assert, to the fullest extent under applicable law, our rights or the rights of the applicable licensors to these trademarks,
trade names and service marks. All trademarks, trade names and service marks appearing in this Form 10-K are the
property of their respective owners.

INDUSTRY AND OTHER DATA

We obtained the industry, market and competitive position data in this Form 10-K from our own internal estimates
and research as well as from industry and general publications and research, surveys and studies conducted by third parties.
Industry publications, studies and surveys generally state that they have been obtained from sources believed to be reliable,
although they do not guarantee the accuracy or completeness of such information. While we believe that each of these
studies and publications is reliable, we have not independently verified market and industry data from third-party sources.
While we believe our internal company research as to such matters is reliable and the market definitions are appropriate,
neither such research nor these definitions have been verified by any independent source.

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ITEM 1.  BUSINESS

Overview

PART I

We are a vertically integrated, clinical stage gene therapy company with six programs in clinical development and 

a broad pipeline of preclinical and research programs.  We have core capabilities in viral vector design and optimization 
and gene therapy manufacturing, as well as a potentially transformative gene regulation technology.  Led by an experienced 
management team, we have taken a portfolio approach by licensing, acquiring and developing technologies that give us 
depth across both product candidates and indications.  Though initially focusing on the eye, salivary gland and central 
nervous system, we intend to expand our focus in the future to develop additional gene therapy treatments for patients 
suffering from a range of serious diseases.

We own and operate a flexible and scalable viral vector manufacturing facility in London, United Kingdom that 

we expect can supply our current ophthalmology, neurodegenerative disease and salivary gland clinical and preclinical 
programs through regulatory approval and, should they be approved, provide sufficient capacity for commercial 
production.  Completed in early 2018 and designed to meet global regulatory requirements, including the current good 
manufacturing practices, or cGMP, required by the U.S. Food and Drug Administration, or FDA, our 29,000 square foot 
facility has two cell production suites, three independent viral vector production suites providing multi-product and multi-
viral vector manufacturing capabilities and an integrated, flexible fill-and-finish suite.  In May 2018, we were granted a 
license to manufacture gene therapy product candidates in our cGMP compliant manufacturing facility by the UK 
Medicines and Healthcare products Regulatory Agency, or MHRA.  The MHRA re-certified the facility in the second
quarter of 2020.

We have expanded our manufacturing capabilities by acquiring a second cGMP viral vector manufacturing facility 

and a cGMP plasmid and DNA production facility in Shannon, Ireland. We completed the acquisition of these facilities in 
January 2021.  The campus encompasses 150,000 square feet and will include a high capacity cGMP manufacturing hub, 
clinical supply storage, quality control laboratories for global release, up to ten viral vector production suites, fully scalable 
automated fill and finish facilities, an extensive warehouse and a separate cGMP plasmid and DNA manufacturing facility.  
We believe building our second viral vector manufacturing facility and bringing cGMP plasmid and DNA production in-
house will provide greater flexibility and efficiency as we advance our product candidates through development, and 
should they be approved, commercial production.

We have also established a comprehensive platform for the efficient clinical development of the next generation of 

gene therapies and manufacturing in accordance with cGMP.  Our deep understanding of disease models informs our 
development of potency assays for the cGMP production of our product candidates, and our teams experienced in viral 
vector design and optimization work closely with our process development team to design viral vectors and develop 
proprietary production cell lines for efficient scaling of manufacturing processes.

We are also developing a potentially transformative technology to enable the use of small molecules to turn gene 

therapy expression on and off.  The aim of this gene regulation platform is to convert gene therapy into a generalizable 
delivery mechanism for biologic drugs using a small molecule “switch” for temporal control.  We believe the capacity for 
temporal control of gene therapy products has the potential to transform the gene therapy landscape by opening up new 
treatment possibilities.

Our Pipeline

Our initial focus is on three distinct areas of unmet medical need: ocular diseases, including inherited retinal 
diseases, or IRDs, as well as large degenerative diseases, severe forms of xerostomia and neurodegenerative diseases.  

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Utilizing our product development platform, we have assembled a pipeline of gene therapies to treat these serious diseases.  
Our criteria for selecting our initial product candidates included:

● unmet medical need;

● high potential for meaningful clinical benefit;

● promising preclinical data using multiple animal models as well as human stem cell derived organoids;

● compartmentalized anatomy of target tissue and the partially immune protected nature of target tissue; and

● understanding of the disease state from natural history studies and detailed long-term characterization of

patients prior to entry into gene therapy treatment studies.

A summary of our product candidates and the status of such product candidates as of March 1, 2021 is described 

below.  We retain worldwide development and commercialization rights to all of our product candidates, with the exception 
of AAV-CNGB3, AAV-CNGA3 and AAV-RPGR, which are subject to a strategic Collaboration, Option and License 
Agreement (the “Collaboration Agreement”) that we executed with Janssen Pharmaceuticals, Inc. (“Janssen”), one of the 
Janssen Pharmaceutical Companies of Johnson & Johnson on January 30, 2019.

In addition to these clinical and preclinical programs, we have preclinical and research programs in other

indications and novel molecular technologies that we aim to advance into clinical development, including:

● geographic atrophy age related macular degeneration, or dry AMD—use of gene therapy technology to

introduce light sensitive molecules into rod photoreceptors in order to restore some aspects of vision lost in
this disease;

● other ocular conditions— glaucoma and uveitis;

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● amyotrophic lateral sclerosis, or ALS—targeting dysregulation of neuronal RNA processing, which we

believe may lead to the degeneration of motor neurons that occurs in ALS;

● Alzheimer’s disease—targeting endosomal trafficking, which is a central mechanism that we believe

underlies Alzheimer’s disease;

● central nervous systems/peripheral nervous system diseases—brain-derived neurotrophic factor gene therapy
for treatment of genetic obesity disorders, as well as the development of gene therapy product candidates for
other central nervous system diseases;

● gene regulation—use of our proprietary RNA shape regulation cassette to switch gene therapy expression on

and off with small molecules, potentially transforming gene therapy technology into a delivery mechanism
for a broad array of biologic drugs; and

● inflammatory/autoimmune diseases—use of gene therapy technology for the local delivery of

immunomodulatory therapeutics, including osteoarthritis, gout and certain rare inflammatory disorders.

Our Ophthalmology Programs

Eye diseases are our first area of clinical focus and we aim to provide treatments with durable, long-term clinical 
benefit that will halt vision loss in patients.  We currently have four Phase 1/2 clinical programs targeting IRDs, including 
AAV-CNGB3 and AAV-CNGA3 for the treatment of achromatopsia, or ACHM, related to mutations in CNGB3 and
CNGA3, respectively, AAV-RPGR for the treatment of X-linked retinitis pigmentosa related to mutations in RPGR, or
XLRP-RPGR, and AAV-RPE65 for retinal dystrophy related to mutations in RPE65, or RPE65 deficiency.  In addition to
these four programs, AAV-AIPL1 was manufactured and released for compassionate use under an MHRA specials license
in the United Kingdom, or UK, to treat patients with Leber congenital amaurosis 4, or LCA4, caused by mutations in
AIPL1.  In addition to these clinical programs in IRDs, we have preclinical programs that apply novel approaches to both 
wet and dry AMD, glaucoma and uveitis, as well as several other IRDs including retinol dehydrogenase 12, or RDH12, 
mutation-associated retinal dystrophy.

We chose diseases of the eye as our first area of clinical focus because we believe the eye is ideally suited for gene

therapy for the following reasons.

● The eye is easily accessible and has highly compartmentalized anatomy, which allows for accurate delivery

of vectors to specific tissues using direct visualization and microsurgical techniques.

● The structure of the eye allows for efficient delivery to specific cell subtypes with small volumes of vector,

making the dose per patient much lower than is needed for systemic treatment.

● Anatomical barriers and unique structure of the eye make the immune response to the intraocular

administration of vectors more attenuated than systemic administration.

● Largely non-dividing cell populations in the eye make good targets for potentially stable, long-term gene

delivery and expression.

● The retina, a structure in the back of the eye, is visible and there are many well validated structural and

functional readouts allowing the detailed assessment of the therapeutic impact of the gene therapy treatment.

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Our strategy for developing gene therapies targeting eye diseases is to begin with a number of monogenic IRDs 

that are good candidates for gene replacement therapies and expand to more common eye diseases over time.  We have 
taken a portfolio approach to the development of IRDs because, while some of these genetic defects are rare, IRDs as a 
class are one of the most common causes of blindness in working age adults and there are multiple synergies at the clinical, 
regulatory and commercial levels between many of these diseases caused by different gene mutations.

The deep scientific and clinical understanding of IRDs driving our approach to gene therapy development helps us 

to optimize our product candidates for each specific genetic mutation and phenotype.  We develop our viral vectors by 
selecting and modifying proprietary cell specific promoters, selecting appropriate capsids for transfection of target cells 
and refining the vector for efficient production and scalable manufacturing.  Not only does this allow us to synergistically 
target a portfolio of inherited eye conditions, we also believe it has potential to be applied to the development of gene 
therapies for other diseases.

Our longstanding relationships with leading institutions in retinal disease treatment, including the Moorfields Eye

Hospital in London, the University of Michigan Kellogg Eye Center, Massachusetts Eye and Ear, the Medical College of
Wisconsin & Froedtert Hospital and the Casey Eye Institute at the Oregon Health & Science University, provide us with
access to experts whose guidance and insight informs our development strategy, as well potential patients for our clinical
trials.

We intend to leverage our platform to take advantage of the many synergies across our ophthalmology programs,
including identification, diagnosis and characterization of patients, specialized surgical techniques, clinical and regulatory
process, vector production and cGMP manufacturing.

AAV-RPGR for the Treatment of X-Linked Retinitis Pigmentosa Associated with Mutations in the RPGR Gene

Retinitis pigmentosa, or RP, is a group of IRDs which represent the most common genetic cause of blindness.  The 

condition is characterized by progressive retinal degeneration and vision loss that ends in complete blindness.  RP initially 
presents as nighttime blindness during childhood or early adulthood, progressing to peripheral visual field loss and “tunnel 
vision,” central visual impairment, reduced visual acuity and, ultimately, complete blindness.

RP may be caused by mutations in any of over 100 different genes.  The most severe forms of RP are X-linked, or 
XLRP, with onset in early childhood and rapid progression to blindness generally by the time patients reach 30 to 40 years 
old.  The most frequent mutation causing XLRP is in the retinitis pigmentosa GTPase regulator gene, or RPGR. XLRP 
associated with a mutation in RPGR, or XLRP-RPGR, accounts for more than 70% of cases of XLRP.  There are estimated 
to be approximately 20,000 XLRP-RPGR patients in the United States (U.S.), Japan and Germany, France, Spain, Italy and 
the UK, or the EU5, with a little less than 50% of those patients being under the age of 40 and approximately 200 new 
cases being diagnosed annually.  We believe the availability of a therapeutic option may increase patient identification and 
the estimated prevalence of XLRP-RPGR.

There are currently no approved treatments for XLRP.

Clinical Development of AAV-RPGR

We have an ongoing natural history study in XLRP-RPGR including approximately 100 patients, which allows us 

to collect structural and functional data for up to five years on prospectively defined endpoints, including functional tests, 
retinal imaging and electrophysiological assessments.  We believe access to this large population of XLRP-RPGR patients 
has enabled us to efficiently enroll appropriate patients into our XLRP clinical development program.

 Since XLRP-RPGR is a progressive disease in which the retina gradually degenerates starting in the outer, or

peripheral, regions of the retina and initially causing “tunnel vision” with final degeneration of the central retina resulting
in the complete loss of visual acuity and blindness that generally occurs by the time patients are 30 to 40 years

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old, we believe that the central region of the retina, including the macula and fovea, must be preserved to prevent the 
ultimate degeneration to blindness and to retain visual acuity.  To this end, we aim to deliver AAV-RPGR to this central 
region of the retina.

We are conducting a Phase 1/2 clinical trial of AAV-RPGR in XLRP patients. AAV-RPGR is delivered via
subretinal injection of up to 1mL with the potential for the surgeon to use multiple retinotomies targeting the region of the
central retina, including the macula and fovea.

In the dose escalation portion of the Phase 1/2 trial, we enrolled 13 patients, including 10 young adults and 3 

children. After we completed dosing patients in the dose escalation portion of the study, we began enrolling patients in the 
randomized, controlled, extension portion of the Phase 1/2 trial. We disclosed six-month data from the dose escalation 
portion of the study as a late-breaker at the American Society of Retina Specialists 2020 Virtual Annual Meeting in July 
2020, nine-month data at EURETINA 2020 Virtual Congress in October 2020 and twelve-month data at the American 
Academy of Ophthalmology 2020 Virtual Annual Meeting in November 2020.  Data from each time point revealed that 
patients treated with low (n=3) and intermediate (n=4) dose AAV-RPGR experienced statistically significant improvement 
in retinal sensitivity. Nine-month data also indicated significant improvement in vision-guided mobility, and at 12-months, 
six of seven patients continued to show improved or stable vision in the treated eye. Each patient was treated with 
subretinal delivery of AAV-RPGR in one eye and the patient’s other eye served as an untreated control. The primary 
endpoint of the trial is safety, with secondary endpoints assessing changes in visual function at pre-specified timepoints 
post-treatment. Baseline values were determined in triplicate.  We also announced in July 2020 that based on the data from
those dose escalation cohorts, we anticipate initiating in 2021 the Phase 3 Lumeos clinical trial of AAV-RPGR for the
treatment of patients with XLRP caused by mutations in the RPGR gene. Additionally, based on the safety and efficacy
profile, the low and intermediate doses are being evaluated in the ongoing randomized, controlled, extension portion of the
Phase 1/2 study, which completed enrollment in the first half of 2020.

The FDA has granted Fast Track and orphan drug designations to AAV-RPGR.  The European Medicines Agency, 

or EMA, has granted Priority Medicines (PRIME), advanced therapy medicinal product (ATMP) and orphan drug 
designations to AAV-RPGR.

AAV-RPE65 for the Treatment of RPE65-Associated Retinal Dystrophy

We are developing AAV-RPE65 for the treatment of retinal dystrophy associated with mutations in the RPE65

gene. RPE65-associated retinal dystrophy causes rod photoreceptor dysfunction and impaired vision from birth.  Absence 
of RPE65 results in severe dysfunction of rods and causes impaired vision in dim lighting conditions.  Although cone 
photoreceptors are generally preserved during childhood in RPE65-deficient patients, the lack of function and degeneration 
of the rods eventually results in the loss of cones and degeneration of the whole retina over time.  Consequently, most
 RPE65-associated retinal dystrophy patients experience central vision loss progressing to complete blindness by early
adulthood.

Based on an estimated prevalence of approximately one in 500,000 people in the United States suffering from

Leber congenital amaurosis, or LCA, related to mutations in the RPE65 gene, and approximately one in 70,000 people in
the United States having RP due to mutations in the RPE65 gene, RPE65-deficiency occurs in approximately one in 
125,000 people in the United States.  There are estimated to be approximately 6,000 RPE65-deficiency patients in the 
United States, Japan and EU5, with almost 30% of those patients being under the age of 30 and approximately 50 new 
cases being diagnosed annually.  We have developed a gene therapy candidate optimized for safety and potency for the 
treatment of RPE65-associated retinal dystrophy, AAV-RPE65. AAV-RPE65 is an AAV2/5 viral vector, in which a codon
optimized RPE65 gene is driven by a novel synthetic retinal pigment epithelium cell specific promoter.

The FDA has approved the first gene treatment for RPE65-associated retinal dystrophy, Luxturna, a commercially 
available product developed by Spark Therapeutics, Inc., which was purchased by Roche.  While RPE65-associated retinal
dystrophy primarily causes a loss of rod function initially leading to impaired vision in dim light, these

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patients ultimately experience complete blindness because of degeneration of the cone rich fovea.  To prevent blindness, 
therefore, we believe it is critical to treat the central retina in order to maintain structural integrity in this region and save 
central vision.  We aim to treat as extensive an area of the central retina as possible, including the cone rich fovea.  Thus, in 
addition to improving rod function, we aim to provide sufficient RPE65 protein to the cells in the central retina to prevent 
the degeneration of both rods and cones in this region, and thereby prevent the progression to complete blindness.

Clinical Development of AAV-RPE65

We have an ongoing natural history study in patients with RPE65-associated retinal dystrophy with approximately

30 patients enrolled that allows us to collect structural and functional data on prospectively defined endpoints, including
functional tests, retinal imaging, and electrophysiological assessments.

Our Phase 1/2 clinical trial enrolled RPE65-associated retinal dystrophy patients in the UK and U.S.  Dosing in 
the Phase 1/2 clinical trial was completed in June 2018.  The primary endpoint of this open-label, dose-escalation clinical 
trial is safety.  Secondary endpoints include the outcomes of a range of functional tests, detailed structural analysis of the 
retina and quality of life measures. A total of 15 patients were treated in this clinical trial, including nine adult patients in 
three dose escalation cohorts and six pediatric patients in the pediatric extension arm of the trial.

In May 2019, we announced positive topline safety and efficacy data from the Phase 1/2 trial of AAV-RPE65.

Additional data from this study were presented at the Retina Subspecialty Day of the American Academy of
Ophthalmology Annual Meeting in October 2019.

AAV-RPE65 met the study’s primary endpoint of safety and tolerability. Additionally, AAV-RPE65 demonstrated

statistically significant improvement across several secondary endpoints assessing clinical activity. Significant
improvement in vision was demonstrated at six months after AAV-RPE65 treatment, as measured by assessments of vision-
guided mobility, retinal sensitivity, visual acuity and contrast sensitivity. Larger improvements from baseline in functional
vision were observed between treated and control eyes at lower light levels. We believe these outcomes address the core
functional manifestation of RPE65-associated retinal dystrophy, which typically causes vision impairment beginning in
early childhood that is most pronounced in low-light conditions, and is consistent with the proposed mechanism of action
of AAV-RPE65.

We expect to initiate a Phase 3 clinical trial for AAV-RPE65 in the second half of 2021.

The FDA and EMA each granted orphan status to AAV-RPE65 for the treatment of LCA caused by mutations in

RPE65.  The FDA also granted AAV-RPE65 rare pediatric disease designation for the treatment of inherited retinal 
dystrophy due to biallelic RPE65 mutations.

AAV-CNGB3 and AAV-CNGA3 for the Treatment of Achromatopsia

Achromatopsia, or ACHM, is an IRD that specifically prevents cone photoreceptors from functioning.  ACHM 

patients are legally blind from birth and usually suffer from severely reduced visual acuity of 20/200 or worse, a disabling 
sensitivity to light, or photoaversion, total color blindness and involuntary back and forth eye movements, or nystagmus. 
ACHM patients suffer significant vision loss due to the complete lack of cone function. ACHM occurs in approximately 
one in 30,000 people in the United States.  The CNGB3 and CNGA3 genes are the two most common genes that have been
identified as causing ACHM, together accounting for up to 92% of ACHM cases, with CNGB3 slightly more common than
CNGA3 in most geographic territories.

There are estimated to be approximately 12,000 patients with ACHM caused by mutations in CNGB3 in the
United States, Japan, and the EU5, with about 25% of those patients being under the age of 18 and approximately 125

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new cases being diagnosed annually.  We believe the availability of a therapeutic option may increase patient identification 
and the estimated prevalence of ACHM.

ACHM is predominantly a stationary disease, which means that ACHM patients’ retinas contain non-functioning 
cones that survive intact for many decades.  This is in contrast to many IRDs in which the entire retina slowly degenerates 
over a patient’s life.  This extended survival of cones with their potential for light sensitivity presents a wide window of 
opportunity to introduce a normal copy of the mutated gene via a gene therapy product candidate and thereby restore cone 
function. While the stationary nature of ACHM means that cones remain present for decades, the functional connections 
between active cones and the visual cortex in the brain are thought to become fixed in teenage years.  Therefore, we 
believe that younger individuals are likely to benefit most from gene therapy treatment for ACHM because of their greater 
visual plasticity. Another debilitating symptom of ACHM, which lasts throughout life, is photoaversion.  A disabling and 
ubiquitous symptom of ACHM, photoaversion is the avoidance of light due to discomfort in the presence of levels of light 
equivalent to a normally lit room or daylight.  ACHM patients often avoid light and wear dark glasses, which further 
diminishes their already very poor vision.  We believe it is possible that restoration of cone function in adult patients might 
have an impact on photoaversion even if brain plasticity is limited.

We believe that gene therapy treatment for ACHM in which we aim to restore cone function via a gene

replacement strategy may offer benefits across a range of ages, which we aim to define in our clinical development
programs.

We have designed specifically optimized gene therapy viral vector candidates to treat ACHM caused by mutations
in each of CNGB3 and CNGA3, with which we aim to address the majority of patients suffering from ACHM.  Our product 
candidates are delivered via subretinal injection covering the central macula region of the eye, where most of the cones in 
the retina are located.

We have an ongoing natural history study in ACHM including over 90 patients that allows us to collect structural
and functional data for up to five years on prospectively defined endpoints, including functional tests, retinal imaging and
electrophysiological assessments. We believe access to these ACHM patients has enabled us to efficiently enroll the most
appropriate patients into our CNGB3 and CNGA3 Phase 1/2 clinical trials.   In addition to giving us access to patients and 
potentially accelerated enrollment in our treatment studies, we believe the prospective natural history data on each treated 
patient allow us to gather robust data from our Phase 1/2 clinical trials in a condensed timeframe.

Clinical Development of AAV-CNGB3 for the Treatment of ACHM Caused by Mutations in CNGB3

We have developed a product candidate, AAV-CNGB3 to treat ACHM caused by mutations in the CNGB3 gene.  
Mutations in the CNGB3 gene prevent cone photoreceptors from functioning because CNGB3’s gene product is integral to 
the formation of a specific membrane channel that enables cones’ electrical response to light.  CNGB3 is a gene exclusively
expressed in cones and our aim is to replace the absent function of the mutant CNGB3 gene with a normal copy of the gene 
in cones of IRD patients and thereby restore cone function.  In order to drive expression of the functional CNGB3 gene
specifically in cones and not in other cells of the retina, we use the cone specific human cone arrestin, or CAR, promoter to
drive the expression of a codon optimized CNGB3 cDNA.  Codon optimization improves protein expression by increasing 
translation efficiency.  To transfect cone photoreceptors, we use the AAV8 capsid, which enables the efficient delivery of 
the CNGB3 gene cargo to those photoreceptors.  As the vast majority of the cones in the eye are located centrally and 
concentrated in the macula, we treat this central region of the retina through subretinal injection to deliver the viral vector 
product candidate to the photoreceptors in which its activity is required.

We are conducting a Phase 1/2 clinical trial of AAV-CNGB3 in both adult and pediatric patients.  In this trial, 

AAV-CNGB3 was delivered via subretinal injection of up to 0.5mL targeting the central region of the retina, including the 
macula and fovea, where most of the cones are located.  One eye is treated in each patient.  The primary endpoint of 

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this open-label, dose-escalation clinical trial is safety. Secondary endpoints include the outcomes of a range of functional 
and structural assessments.

Dosing was completed in this clinical trial in May 2019.  In the dose escalation portion of the trial, we treated 11 
adults. We also treated 12 children in the pediatric expansion cohorts. Six months following treatment, patients can move 
onto a long term follow up study in which they are followed for safety and indication of benefit for an additional four and a 
half years.

Our gene therapy product candidate AAV-CNGB3 was granted orphan drug designation by the FDA and EMA,

rare pediatric disease designation by the FDA for the treatment of achromatopsia caused by mutations in the CNGB3 gene,
and Fast Track designation by the FDA for the treatment of achromatopsia caused by CNGB3 mutations.  We were granted 
PRIME designation by the EMA in October 2018 based on data from the first adult treatment cohort along with preclinical 
data.

Clinical Development of AAV-CNGA3 for the Treatment of ACHM Caused by Mutations in CNGA3

We are also developing AAV-CNGA3 to treat ACHM caused by mutations in the CNGA3 gene.  We have 
designed a synthetic promoter to drive high levels of CNGA3 expression specifically in cones because we believe a larger
amount of CNGA3 protein is required to restore cone function as compared to CNGB3.  AAV-CNGA3 utilizes this 
proprietary pan cone promoter to drive a codon optimized CNGA3 gene sequence.  We believe this novel promoter can 
drive sufficient expression of CNGA3 in cones to restore light sensitivity to these cones in CNGA3 deficient patients.  We 
use the AAV8 capsid to transfect cone photoreceptors in the back of the eye and we target the cones concentrated in the 
central region of the retina via a subretinal injection that covers the macula.

We are currently conducting an open-label, dose-escalation Phase 1/2 clinical trial of AAV-CNGA3 in patients

with ACHM due to mutations in the CNGA3 gene.

Our gene therapy product candidate AAV-CNGA3 was granted orphan drug designation by the FDA and EMA,

rare pediatric disease designation by the FDA, and in January 2021, was granted Fast Track designation by the FDA for the
treatment of achromatopsia caused by CNGA3 mutations.

AAV-AIPL1 for the Treatment of LCA4

LCA4 is an IRD that causes complete blindness before age five.  AIPL1 is a central protein for the maintenance of 

photoreceptor structure and function.  Deletion of the AIPL1 gene causes the most severe form of early retinal dystrophy, 
LCA4, in which the retinal structure is destroyed with complete vision loss.  LCA4 is rare, representing approximately 8% 
of all LCA cases.

There are currently no approved treatments for LCA4, and we believe an effective intervention will require

introducing a normal functional copy of the AIPL1 gene into rod and cone photoreceptors early in a patient’s life while 
some retinal structure remains in order to activate function and survival of the photoreceptors that are still present.  We 
believe gene therapy has the potential to be the only effective way to address the disease’s root cause.

LCA4’s extremely rapid progression, rarity and early age of onset make the standard process of seeking regulatory 

approval through clinical development challenging because adult safety trials would not yield meaningful data given the 
early onset of the disease.  We believe we are well placed to initiate the first clinical intervention in this indication through 
our relationships with the University College of London, or UCL, and Moorfields Eye Hospital, whose expertise and large 
IRD patient population enables such an aggressive and uncommon IRD to be treated.

To address LCA4, we developed a viral vector to replace the AIPL1 gene in all photoreceptors by using the AIPL1

cDNA driven by the rhodopsin kinase promoter, which is active in both rods and cones.

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We have manufactured and released AAV-AIPL1 for compassionate use under an MHRA specials license in the 

UK to treat LCA4 patients.  A specials license allows physicians to prescribe a treatment of AAV-AIPL1 for LCA4 patients 
they deem appropriate.  We play no role in the physician’s treatment decision.  We intend to use any data produced by the 
compassionate use treatment to inform any potential clinical development plan as well as any interactions with the 
regulatory agencies that would enable us to make this intervention more widely available to the LCA4 patient population.

As the manufacturer of AAV-AIPL1 under a specials license, we have a record retention requirement and a

continuing obligation to inform the MHRA of any suspected adverse reaction to our medicinal product which is a serious
adverse reaction.

The UK’s Human Medicines Regulations 2012 allow for the manufacture and supply of medicinal products not 

authorized for marketing to patients with special needs at the request of the healthcare professional responsible for the 
patient’s care (these products are referred to as “specials”).  A special may only be supplied in: (i) response to an 
unsolicited order from a healthcare professional responsible for the care of the patient, (ii) if the product is manufactured 
and assembled in accordance with the specifications of that healthcare professional to fulfil the special needs of the 
individual patient that cannot be met by products already authorized for marketing and (iii) if the product is manufactured 
under a specials license granted by the MHRA.

Manufacturing a special also imposes a five year record retention requirement subject to review by the MHRA,

including details of any suspected adverse reaction to the product so sold or supplied of which the person is aware or
subsequently becomes aware, as well as a continuing obligation to notify the MHRA of any suspected adverse reaction to
the medicinal product which is a serious adverse reaction.

The FDA and EMA granted orphan designation to AAV-AIPL1 for treatment of inherited retina dystrophy due to

defects in AIPL1 gene.

Ophthalmology Preclinical Development Pipeline

We also have a preclinical IRD development pipeline focused on diseases caused by mutations in additional 
genes.  In order to expand our gene therapy pipeline for retinal diseases, we are also developing treatments for certain 
multifactorial eye diseases, which are diseases caused by multiple genetic or environmental factors.

AAV-RDH12 for the Treatment of RDH12 Mutation-Associated Retinal Dystrophy

Disease-causing sequence variants in RDH12 cause severe retinal dystrophy most often resulting in the clinical 

diagnosis of Leber congenital amaurosis (LCA) and early onset severe retinal dystrophy (EOSRD); although RDH12 
variants have also been associated with a clinical diagnosis of RP.  Sequence variants in RDH12 account for 3.4%–10.5% 
of LCA/EOSRD. Individuals with RDH12 deficiency exhibit widespread retinal degeneration impacting both rods and 
cones, with early macular involvement. Most people with RDH12–LCA/EOSRD experience marked central visual loss by 
their late teens to twenties.  AAV-RDH12 is an AAV based gene therapy designed to deliver a functional copy of the 
RDH12 gene to the retina of patients with genetically defined RDH12 deficiency.

We recently received orphan drug designation from the FDA as well as orphan medicinal product designation 

from the EMA for AAV-RDH12.  

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Wet and Dry Neovascular Age Related Macular Degeneration (AMD)

We are developing pre-clinical programs relating to neovascular age related macular degeneration, or wet AMD.  

We use a gene therapy product to deliver an antibody targeting the vascular endothelial growth factor receptor 2, or anti-
VEGFR2, with the aim of blocking disease related vascular formation in the eye.

Additionally, we are developing a novel approach to treat advanced dry AMD patients who have lost central 

vision through our innovative “rod-to-cone” technology.  By genetically engineering rods with molecules that will improve 
their speed of response to light, we aim to effectively transform a patch of rod photoreceptors in the outer part of the retina 
to behave more like cone photoreceptors, thus improving vision. There is no currently approved therapy that impacts 
disease progression of dry AMD.  The best available treatment for patients after they lose central vision and acuity is 
support and rehabilitation services to help them better utilize the remaining peripheral part of their retina.

Our Salivary Gland Programs

Our second area of clinical focus is xerostomia, a chronic and debilitating disorder of the salivary glands in which 
saliva production is impaired.  Xerostomia may be caused by a number of different insults to the salivary glands, including 
radiation therapy for head and neck cancer and certain autoimmune diseases.

AAV-AQP1 for the Treatment of Radiation-Induced Grade 2/3 Xerostomia

Radiation induced xerostomia, or RIX, is a severe and debilitating long-term side effect of radiation treatment for

head and neck cancer. Chronic RIX results in severe side effects, including difficulty swallowing, or dysphagia, oral
discomfort, malnutrition, oral mucositis, changes in taste, increased oral infections and dental cavities. There are currently
no FDA approved treatments for RIX.

Worldwide, there are approximately 650,000 new cases of head and neck cancer diagnosed each year, with 
approximately 58,000 cases in the United States alone, making it the fifth most common malignancy.  Approximately 85% 
of patients who receive radiation treatment for head and neck cancer experience reduced saliva production during 
treatment, and approximately 40% of those patients who remain cancer free for two or more years after treatment continue 
to suffer from grade 2 or 3 RIX.  There are approximately 170,000 such patients in the United States, with approximately 
15,000 new cases each year.

Salivary glands are an attractive target organ for gene therapy treatments because they are self-contained, partially

immune protected and easily accessible, allowing for non-invasive delivery of small vector doses.

We are developing AAV-AQP1 to treat RIX by increasing water conduction in the chronically damaged salivary 
glands by introducing a water conducting channel into the remaining epithelial cells of these damaged glands.  Adequate 
water secretion by surviving epithelial cells has the potential to deliver the protective exocrine proteins produced by 
remaining gland cells into the mouth.

The key to our approach is that, unlike the water conducting acinar cells, the water impermeable duct cells of the 

glands appear to be resilient to infrared radiation exposure.  As a consequence of this relative resilience to radiation 
treatment, salivary glands damaged by radiation treatment tend to contain mostly water impermeable ductal epithelial cells.  
To make these duct cells permeable to water, AAV-AQP1 introduces the gene for the human aquaporin water channel, or
 hAQP1.  We have demonstrated that this has the potential to convey water permeability and causes ductal cells to generate 
an osmotic gradient, which causes them to secrete fluid into the lumen of the duct.

The proof of concept for this mechanism and its ability to increase the volume of saliva secreted by damaged 

salivary glands was observed in a Phase 1 clinical trial conducted by the NIH in patients with chronic grade 2 or 3 RIX.  
The trial was designed as a short-term dose escalation trial of a gene therapy using adenovirus as the vector to deliver the 

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hAQP1 to the remaining epithelial cells in the parotid gland of 11 patients suffering from chronic RIX.  There were no 
reported severe adverse events among the patients treated, two out of three patients in each of the first three cohorts in this 
clinical trial were observed to have objective increases in saliva volume produced by the treated parotid gland, with 
increases in parotid flow ranging from 60% to 540%, and all but one of these patients showed a decrease in symptoms of 
dry mouth as measured by subjective visual analog scales, validated in other forms of xerostomia.  The results of this study 
were published in Proceedings of the National Academy of Sciences in 2012.

We are currently conducting a Phase 1 dose escalation clinical trial of AAV-AQP1 at the NIH in patients with 

grade 2 or 3 RIX who remain cancer free for at least five years after receiving radiation treatment.  In this trial we are using 
AAV2 to deliver the hAQP1 gene, as we believe AAV2 efficiently transfects the salivary gland cells and does not spread 
beyond the target cells.  The aim of the trial is to determine the safety of inserting hAQP1 locally into the salivary glands of 
RIX patients, as well as to measure changes in salivary flow resulting from the introduction of this channel.  We have 
completed dosing in the first three cohorts and are enrolling patients into the fourth dose escalation cohort. This clinical 
trial is being conducted in conjunction with the National Institute of Dental and Craniofacial Research at the United States 
National Institutes of Health, or the NIH, Dental Clinic.

In the third quarter of 2019, we also initiated a multi-site Phase 1 clinical trial of our product candidate AAV-

AQP1 for the treatment of grade 2 or 3 RIX. We have completed treating patients in the first dose escalation cohort and 
have treated one patient in our second cohort.  We expect to continue to open additional sites and enroll patients in dose 
escalation cohorts throughout 2021.  In December 2020, we provided an update on the first cohort of patients (n=3) treated
in this clinical trial where one patient has reached the 12-month assessment and two have passed the 6-month assessment.
 In these patients, AAV-hAQP1 has been well tolerated with no dose limiting toxicity and no serious adverse events
reported. Encouraging responses have been seen in both patient-reported measures of xerostomia symptoms and in salivary
output in the patients treated in this first cohort, with complete resolution of symptoms in the patient who has reached the
12-month timepoint.  Based on the encouraging safety and tolerability profile from this first cohort, we are initiating plans
for a Phase 2 efficacy and safety clinical trial for the treatment of patients with radiation-induced xerostomia.

The FDA granted orphan drug designation for AAV-AQP1 to treat symptoms of grade 2 and grade 3 late

xerostomia from parotid gland hypofunction caused by radiotherapy for cancer of the oral cavity.

AAV-AQP1 for the Treatment of Sjogren’s Syndrome

The destruction of salivary tissue resulting in chronic xerostomia may also be caused by chronic autoimmune 

disease.  Sjogren’s syndrome is an autoimmune disease in which a patient’s immune system may target the salivary glands.  
Chronic inflammation of the salivary glands results in long term damage and chronic xerostomia in many Sjogren’s 
patients.  Data from preclinical studies in animal models of Sjogren’s syndrome and data from explants of minor salivary 
glands of Sjogren’s patients suggest that Sjogren’s syndrome may also be treatable with our AAV-AQP1 vector.  Supported 
by data from our preclinical studies and our ongoing RIX clinical trials, we are currently conducting IND-enabling studies 
of AAV-AQP1 for xerostomia caused by Sjogren’s syndrome.

Our Neurodegenerative Disease Programs

Neurodegenerative diseases are our third area of focus. Relying on our expertise in viral vector design, delivery,

production and manufacturing, we are aiming to develop and optimize vectors to effectively treat both genetic and sporadic
forms of these diseases.

AAV-GAD for the Treatment of Parkinson’s Disease

Our first target indication is Parkinson’s disease, where we have Phase 2 clinical data from a successful

randomized, double-blind, sham-controlled trial.

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Affecting nearly one million Americans and 10 million worldwide, Parkinson’s disease is the second-most 
common neurodegenerative disease after Alzheimer’s disease and is the 14th-leading cause of death in the United States.  It 
is associated with a progressive loss of motor control (e.g., shaking or tremor at rest and lack of facial expression), as well 
as non-motor symptoms (e.g., depression and anxiety).  There is no cure for Parkinson’s disease and 60,000 new cases are 
diagnosed each year in the United States alone.

Our product candidate targeting Parkinson’s disease, AAV-GAD, is designed to deliver the glutamic acid
decarboxylase, or GAD, gene to the subthalamic nucleus in order to increase production of GABA, the primary inhibitory 
neurotransmitter in the human brain.  GAD is the rate-limiting enzyme in the synthesis of GABA, therefore we believe that 
increasing subthalamic nucleus GAD expression through gene therapy has the potential to address the dysregulation of 
motor circuits and improve symptoms in Parkinson’s disease patients without affecting other brain regions, which can be 
responsible for complications of existing therapies.

Clinical Development of AAV-GAD

In a blinded Phase 2 clinical trial of AAV-GAD in patients with medically refractory Parkinson’s disease, 45 

patients were randomized 1:1 to receive either AAV-GAD gene therapy delivered by injection into the subthalamic nucleus 
on both sides of the brain or bilateral sham surgery.  Subjects were followed for one year and all results remained blinded 
until the final treated patient reached the 6-month primary endpoint.  The trial met the primary endpoint, of six-month 
change from baseline in double-blind assessment of off-medication motor scores of the Unified Parkinson’s Disease Rating 
Scale, or UPDRS.  At the six-month endpoint, UPDRS score for the AAV-GAD group decreased by 8.1 points (SD 1.7, 
23.1%; p<0.0001) and by 4.7 points in the sham group (1.5, 12.7%; p=0.003).  The AAV-GAD group showed a 
significantly greater improvement from baseline in UPDRS scores compared with the sham group over the six-month 
course of the study (RMANOVA, p=0.04).  An improvement in complications of medical therapy as measured by the 
UPDRS part 4 was observed in the AAV-GAD group at both six and 12 months.  A significant decline in duration of 
disabling dyskinesia was observed only in the AAV-GAD treated patients.

AAV-GAD was reported to be well-tolerated, with no significant adverse events related to the therapy and no 

speech or cognitive complications observed.  The results of the trial were published in the March 2011 issue of The Lancet
Neurology, the August 2014 issue of the Journal of Clinical Investigation and the April 2017 issue of JCI Insight, building
upon publications of the Phase 1 trial data in The Lancet and the Proceedings of the National Academy of Sciences.  In 
addition, in research published in the November 28, 2018 issue of Science Translational Medicine, fifteen patients treated 
with AAV-GAD gene therapy were observed to have expressed a treatment-related reorganization of functional brain 
connectivity that was related to disease symptom improvement.  These flurodeoxyglucose positron emission tomography 
analyses provided objective biological evidence of improvements in abnormal brain networks associated with Parkinson’s 
disease following AAV-GAD gene therapy.

These results were observed in patients treated in both Phase 1 and Phase 2 studies.  Blinded analyses showed 

significant improvements in abnormal thalamic metabolism, a key node in the movement circuitry, in the AAV-GAD 
treated patients.  This pattern of brain network activity was not seen in untreated hemispheres or patients in the sham arm.  
Furthermore, a specific pattern of brain network activity was identified in those subjects with clinical improvements in the 
sham arm, which was different from the pattern observed in AAV-GAD responders.

 We anticipate filing an Investigational New Drug application (IND) for AAV-GAD by the third quarter of 2021, 

with material that has been manufactured with our in-house proprietary manufacturing process at our cGMP manufacturing 
facility in London. 

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Neurodegenerative Disease Preclinical Development Pipeline

In addition to our clinical stage Parkinson’s disease program, we continue to conduct research to develop our

preclinical pipeline of gene therapy product candidates for the treatment of other serious diseases of the central nervous
system, including AAV-UPF1 to address motor neuron death in ALS, and an Alzheimer’s disease program focused on
endosomal trafficking dysfunction. Each of these programs are directed towards the underlying cell biology that may be
driving neurogeneration in these diseases.

ALS

ALS is a devastating, progressive, neurodegenerative disease leading to the loss of motor neurons, which are the 

neurons that control the ability to move, speak, swallow and ultimately to breathe.  The gradual paralysis in ALS invariably 
leads to death.  While 10% of ALS cases are caused by inherited genetic mutations, most ALS occurs sporadically, with no 
known genetic cause.  Mutations in over 20 genes have been identified that cause the inherited ALS cases.  
Characterization of these disease-causing genes have implicated several cellular pathways in the disease, with a prominent 
role emerging for genes involved in the cellular control of RNA.  Many new regulatory roles are being discovered for 
RNA, particularly in neurons.

We have designed a viral vector product candidate, AAV-UPF1, with the aim of increasing UPF1 expression in 
the motor neurons of ALS patients.  In preclinical studies, we observed that administration of AAV-UPF1 reduced motor 
neuron death thought to be driven by the toxic effects of several different genetic causes of ALS including, TDP-43, FUS 
and C9orf72.  Improvements in ALS-like symptoms related to limb strength and mobility in rodent models of ALS have 
also been observed following administration of AAV-UPF1.

We believe that gene therapy using AAV-UPF1 may increase UPF1 levels in cells affected by ALS, and we intend

to deliver our viral vector product candidate to the central nervous system via intrathecal injection, or injection into the
spinal canal.

Alzheimer’s Disease

With the world population aging, Alzheimer’s disease has emerged as an extremely common and costly disease.  

While some treatments that have temporary effects on Alzheimer’s disease symptoms are available, there is currently no 
approved treatment that halts the progression of the disease.

Our Alzheimer’s disease program focuses on the endosomal trafficking pathway.  In preclinical studies, we 

observed that increasing levels of key retromer proteins may reverse endosomal trafficking defects.  We are identifying 
suitable retromer targets for gene augmentation in pre-symptomatic Alzheimer’s patients.

There are several reasons why gene therapy is, in principle, well suited for Alzheimer’s disease and other 
neurodegenerative diseases.  The first relates to the pathophysiology, time course, and anatomical spread of these disorders.  
Neurodegenerative diseases generally begin locally in selectively vulnerable regions with “cell sickness” years before 
rampant cell death and wide-spread anatomical distribution.  To be most effective, we believe interventions should be 
administrated early and will benefit from local delivery.  Even then, however, an intervention must maintain its efficacy for 
years because, unlike other cells in the body, neurons do not typically divide over the course of their life.  We believe AAV-
delivered gene therapy products may have a durable effect.  In the best case scenario, one delivery successfully taken up by 
targeted neurons would be sufficient for years of efficacy.

An important component of our approach is the development and validation of surrogate markers of endosomal 

dysfunction and predictive markers of Alzheimer’s disease.  In particular, several well studied biomarkers linked to 
Alzheimer’s disease, such as amyloid-beta and tau, have also been shown to be biomarkers of endosomal trafficking 
dysfunction in neurons.  Such biomarkers could potentially be used to identify patients with Alzheimer’s disease, as well 

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as demonstrate potential product efficacy in the absence of Alzheimer’s disease symptoms.  By targeting endosomal 
trafficking dysregulation we aim to address the underlying cause of Alzheimer’s disease as well as other neurodegenerative 
diseases, such as certain forms of Parkinson’s disease.

Our Strengths

In addition to our three core therapeutic areas of focus, our six ongoing clinical development programs, and our 

broad pipeline of preclinical programs, we have core capabilities in viral vector design and optimization, gene therapy 
manufacturing and a potentially transformative gene regulation technology.  Utilizing the following key strengths, we aim 
to develop, commercialize and expand our portfolio of product candidates.

● Deep Expertise in Gene Therapy Development: We believe our expertise in viral vector design,

optimization and process development allows us to efficiently advance gene therapy products candidates
from preclinical development to cGMP manufacturing and clinical development through commercialization.

● Potentially Transformative Gene Regulation Technology Platform: We are developing proprietary 

technology to enable innovative gene therapy treatments whose expression can be turned on and off with an 
easily administered small molecule.  We believe the capacity for temporal control of gene therapy products 
has the potential to transform the gene therapy landscape by opening up new treatment possibilities.

● Manufacturing Capabilities and Capacity: We have a flexible and scalable cGMP manufacturing facility
and production process in London, which we expect can supply our current clinical and preclinical programs
through regulatory approval and, should they be approved, provide sufficient capacity for their commercial
production. We have also expanded our manufacturing capabilities by acquiring a second cGMP viral vector
manufacturing facility and cGMP plasmid and DNA production facility in Shannon, Ireland. The plasmid
and DNA production facility is complete and we expect the viral vector manufacturing facility to be
completed during 2021.

● Robust and Diverse Clinical and Preclinical Pipeline: Applying our portfolio approach to gene therapy
product development, our initial focus is on treatments for ocular disorders, including IRDs, as well as
salivary gland disorders and neurodegenerative diseases. We have six programs in clinical development, one
program under a compassionate use specials license and a broad preclinical development pipeline.

● Relationships with Leading Institutions: Our longstanding relationships with leading institutions and

experts provides us with guidance on development strategy and access to potential patients for our clinical
trials.

● Natural History Study Data: We sponsor ongoing prospective long-term natural history studies in IRDs

that facilitate our ability to efficiently enroll our treatment studies, potentially reducing clinical trial timelines
and providing insight into the appropriate endpoints for regulatory approval.

Our Strategy

Our goal is to develop and commercialize innovative gene therapy products to treat serious disorders and broaden 

the scope of indications that may be treatable by our gene therapies.  Our strategy to achieve this goal is to:

● successfully complete clinical development, obtain regulatory approval and commercialize our pipeline of

gene therapy product candidates;

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● continue to advance the development of our preclinical pipeline product candidates;

● utilize our viral vector design and optimization capabilities to identify and develop new gene therapies for

serious diseases;

● advance the development of our potentially transformative proprietary technology for regulating the activity

of gene therapy products using small molecules and initiate clinical trials of new regulatable product
candidates; and

● continue to pursue and evaluate further strategic collaborations with additional biotechnology and

pharmaceutical companies to leverage our capabilities, manufacturing capacity and proprietary gene
regulation technology.

The figure below depicts the steps in our product engine, including disease selection, design, development/testing,

clinical and manufacturing:

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Gene Therapy Overview

Gene therapy uses a delivery vehicle, referred to as a vector, to insert a functionally active gene into cells in the 

body.  The gene encodes a therapeutic protein that may block disease pathways or may enhance a deficient pathway.  Gene 
therapy has been studied for over 50 years, with a variety of different viral vectors employed to deliver therapeutic genes.  
Since the first clinical study of therapeutic gene transfer in humans in 1990, thousands of gene therapy studies covering a 
broad range of disease targets have been initiated.  In recent years, the first gene therapies have received regulatory 
approval, including approval by the FDA of Luxturna, marketed by Spark Therapeutics, Inc. which was purchased by 
Roche, for treatment of RPE65-associated retinal dystrophy, and Zolgensma, marketed by AveXis, Inc., a Novartis
company, for the treatment of spinal muscular atrophy, resulting in a growing acceptance of gene therapy technology as a
potentially safe and effective therapeutic approach.

Our current programs use adeno-associated virus, or AAV, as the vector for delivering gene sequences into a 

patient’s cells.  The key components of an AAV vector include: (i) the capsid, or the outer viral protein shell that encloses 
the target DNA, which is responsible for binding to the cell surface and allowing the therapeutic gene that it is carrying to 
enter the cell; (ii) the therapeutic gene, or transgene, that encodes the therapeutic protein; and (iii) the promoter, or the 
DNA sequence that drives the expression of the transgene.  AAV is a good vector for gene therapy delivery because of its 
relative safety and broad applicability.  AAV is less immunogenic, or less prone to causing an immune reaction, than 
previous generations of gene therapy vectors, such as adenoviral vectors and AAV does not readily integrate into the 
genome of the target cell, reducing the potential for oncogenesis, or the induction of cancer.  AAV vectors can transfer a 
therapeutic gene into, or transduce, numerous cell types.  Slight differences in capsid proteins can modulate the efficiency 
with which different capsids deliver genes to different cells, thus allowing different AAV capsids to be selected to most 
effectively target particular cell types.

The therapeutic gene sequence that enters the targeted cell includes both the protein coding region and an 

engineered promoter sequence that is used to drive functional gene expression.  These engineered promoters may be 
designed to drive different levels of gene expression or to limit gene expression to specific cell types.  Additional aspects of 
the transgene sequence may be engineered for optimal gene expression, such as codon usage and synthetic introns, which 
may enhance levels of therapeutic protein expression.

Gene therapy can be used to address monogenic diseases, which result in mutations in a single gene in a patient’s 

genome.  In such cases, the viral vector is used to deliver a normal copy of the gene to the cells that are defective due to the 
lack of the gene function.  The normal gene then drives production of the missing protein and offers a therapeutic benefit in 
patients with the disease.  This gene replacement approach underlies all of our IRD programs.

In addition to replacing a gene that is defective or missing in a monogenic disease, gene therapy can also provide a 
therapeutic impact by adding a particular new gene function to cells and thereby change cell behavior and function in other 
types of diseases.  This is the aim of our salivary gland programs, where our treatment is designed to promote water to flow 
through otherwise impermeable cells in damaged salivary glands and increase saliva flow into the mouth.  Additionally, 
gene therapy may be used to deliver a therapeutic protein that may block a disease pathway or enhance a deficient cellular 
pathway in multifactorial diseases such as wet AMD and neurodegenerative diseases, including ALS and Alzheimer’s 
disease.

Importantly, AAV vectors enable targeting of therapeutic genes to non-dividing cells, in which they are thought to 

remain for the rest of the cell’s life.  This means that a single treatment may offer patients a durable effect and long-term 
benefit.  The specific cells of the eye, salivary gland and the neurons that we target in our current gene therapy programs 
are largely non-dividing cells and preclinical evidence has shown that they can be effectively targeted by the specific AAV 
capsids that we use, enabling us to potentially achieve a durable impact on each of the diseases that we treat.

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Our Competitive Advantage in IRDs: Vector Engineering, Natural History Studies and Relationships with Leading
Institutions

IRDs as a class are the most common cause of blindness in the working age population worldwide and a leading 

cause of impaired vision in children in developed countries.  There are approximately 200,000 people in each of the United 
States and European Union (including the UK), affected by IRDs.  However, IRDs may be caused by mutations in over 300 
identified genes, and in many cases each genetically defined IRD may be a small patient population.  Meaningful clinical 
trials for these sorts of rare indications are especially challenging because they require access to sufficient patients and 
baseline data on each patient in order to secure clear indicators of efficacy as a result of intervention.  We seek to address 
this problem by sponsoring prospectively designed natural history studies in each of the indications that we are treating in 
our Phase 1/2 trials.

For each of the natural history studies, baseline assessments are made upon enrollment, with follow up 
assessments at later time points.  A broad range of assessments are used, including functional tests, retinal imaging and 
electrophysiological assessments.  The same assessments used for each natural history study are used in our corresponding 
clinical trial targeting the same indication, allowing us to compare the impact of our product candidates on the progression 
of these diseases on a population, as well as individual patient basis.

We expect the natural history studies will enhance our understanding of disease progression for each indication 
that we are targeting and allow us to identify optimal windows for intervention, provide specific functional and structural 
parameters to quantify treatment effects and define clinical endpoints.  These studies also provide us with a source of 
potential patients for our treatment studies and have facilitated efficient enrollment of these studies.  These patients are not 
only genotyped, but also have up to five years of detailed functional and structural assessment data prior to enrollment into 
an appropriate treatment study.

We also have longstanding active relationships and clinical site agreements with leading institutions in retinal

disorder treatments, including, among others, Moorfields Eye Hospital in London, the University of Michigan Kellogg Eye
Center, Massachusetts Eye and Ear, the Medical College of Wisconsin & Froedtert Hospital and the Casey Eye Institute at
the Oregon Health & Science University.  These institutions and others where we have active relationships are among the 
premier treatment centers for the indications that we are pursuing and provide us with access to potential patients for our 
clinical trials and experts in IRDs who offer strategic guidance and expertise for our development strategy.  They provide 
services with respect to our preclinical and clinical studies.  Participants enrolled at the University of Michigan Kellogg 
Eye Center and Massachusetts Eye and Ear Hospital may travel to the Medical College of Wisconsin & Froedtert Hospital 
for adaptive optic assessments.  The Casey Eye Institute at the Oregon Health & Science University provides certain 
reading center and other clinical services with respect to our clinical trials.

Our Gene Regulation Platform

We are developing a potentially transformative technology designed to enable us to use small molecules to turn 
gene therapy product candidates on and off.  The aim of this gene regulation platform is to transform gene therapy into a 
generalizable mechanism for the delivery of biologic drugs.  The idea is that the gene encoding a particular biologic drug 
or a therapeutic antibody would be delivered to target cells in the body, but these genes would only be activated in the 
presence of a specific small molecule.  The therapeutic protein would be manufactured by the body only in the presence of 
the small molecule so that intermittent production of the therapeutic protein would be achieved by dosing with the small 
molecule drug.

This temporal regulation of gene therapy products by exogenous small molecules has long been a goal of gene 
therapy researchers.  The ability to regulate transgenes by introducing temporal control has the potential to transform the 
gene therapy landscape and the biologics industry as a whole.  Our approach focuses on riboswitches to regulate gene 
expression rather than on the modulation of transcription factor activity, and this is the basis of our gene regulation 
platform.

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Riboswitches are pieces of RNA that fold into alternative shapes depending on the binding of a specific small 

molecule to that RNA sequence.  One RNA shape allows the gene containing the riboswitch to be active, while the 
alternative shape inactivates the gene.  Riboswitches are used extensively by bacteria, but none have been identified in 
mammalian cells to date.

We designed de-novo mammalian riboswitches that we have observed respond to small molecules to switch genes
on and off in mammalian cells and in vivo in mice.  Our riboswitch contains a stretch of RNA sequence, called an aptamer, 
that binds to a specific small molecule.  The riboswitch is inserted into the therapeutic transgene cDNA.  In the absence of 
the specific small molecule, the unbound riboswitch folds into the shape that drives the destruction of the RNA message 
and no therapeutic protein is produced in the absence of the small molecule.  However, when the small molecule is present 
and binds to the riboswitch it adopts the alternative RNA shape, causing stable messages to be formed and the therapeutic 
protein to be produced.

One of the features of our mammalian riboswitch is its range of regulation.  Using small molecules we have the 

ability to switch the riboswitch containing gene on to levels greater than 5,000x higher than in the absence of the small 
molecule.  We believe this technology is viable for a therapeutic product and is also the first instance of a proprietary 
system for screening randomized aptamers and small molecules within mammalian cells for functional interactions.

Using our proprietary technology, we have the ability to regulate multiple genes in vitro and in vivo in multiple

tissue types using multiple small molecules. We are currently screening libraries to identify unique small molecule and
aptamer pairs with the desired pharmacokinetic profiles for various therapeutic uses.

Our Manufacturing Capabilities

We own and operate a cGMP manufacturing facility situated in London, United Kingdom.  Supporting our global 

approach to clinical development and market supply, we designed the 29,000 square foot facility to meet multiple 
regulatory standards, including the MHRA, EMA and FDA standards.

We believe our facility can supply our current clinical and preclinical programs through regulatory approval and, 
should they be approved, provide sufficient capacity, for commercial production.  Strategically, we believe our facility will 
minimize our dependence on third-party CMOs, which we believe provides a significant strategic, clinical and commercial 
advantage.

Our London facility is flexible and scalable, with eleven independent air handling units, two cell culture suites and 

three separate viral vector production suites, which allows us to produce multiple product candidates in parallel, as well as 
sequentially at different scales.  This allows us to accommodate up to three independent parallel manufacturing streams of 
viral vector products that are isolated within dedicated production areas.

Our London manufacturing facility includes an integrated analytical department and in-house analytical tool kit 

that allows for in-house release of clinical and commercial manufactured products.  It is also equipped with dedicated areas 
for microbiology, molecular biology, and cell-based analytics.  Our analytical department can perform product related 
assays, allowing us to retain and gain expertise that is normally lost to third parties.  The close integration allows for rapid 
turnaround and flexibility in scheduling of key assays, reducing lead times for product candidate releases.  Further, our 
dedicated product fill and finish suite allows us to manufacture a full range of clinical and commercial products under one 
roof and in our control.

We have more than 120 highly trained multidisciplinary staff on our manufacturing team with backgrounds in a
diverse array of manufacturing sciences, technologies, analytics and production working together to expedite delivery of
gene therapy products.

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We have identified and licensed a proprietary HEK-293 cell line that is well characterized and that we have 

banked in hundreds of vials.  The specific cell line, size of the bank, culture media, and cryopreservation agents have been 
selected to facilitate bridging between process development platforms and targets.  Our HEK-293 cells are suitable for both 
the adherent culture platform and the bioreactor process.  We believe the ability to use the same cell line throughout the 
product and process development lifecycle will allow us to use a bracketed approach to process validation and 
comparability, which we believe may reduce the time and costs related to their implementation.

We have expanded our manufacturing capabilities by acquiring a second cGMP viral vector manufacturing facility 

and a cGMP plasmid and DNA production facility in Shannon, Ireland. We completed the acquisition of these facilities in 
January 2021.  The campus encompasses 150,000 square feet and will include a high capacity cGMP manufacturing hub, 
clinical supply storage, quality control laboratories for global release, up to ten viral vector production suites, fully scalable 
automated fill and finish facilities, an extensive warehouse and a separate cGMP plasmid and DNA manufacturing facility. 

We currently rely on third-party manufacturers for the plasmid used in the production of our product candidates. 
We believe that building a second viral vector manufacturing facility and bringing cGMP plasmid and DNA production in-
house will provide greater flexibility and efficiency as we advance our product candidates through development, and 
should they be approved, commercial production.  The plasmid and DNA production facility has been completed and we 
expect the vital vector facility to be completed by the end of 2021.

Our significant investment in the development of our internal manufacturing capacity and expertise to allow for
better control over our process development timelines, costs, product quality and intellectual property provides us with a
key competitive advantage.

Competition

The biotechnology and pharmaceutical industries are characterized by rapidly changing technologies, significant 

competition and a strong emphasis on intellectual property.  This is true in the field of gene therapy generally, and in the 
treatments for our key disease areas.  While we believe that the strength of our team, gene therapy expertise, scientific 
knowledge and intellectual property provide us with competitive advantages, we face competition from several sources, 
including large and small biopharmaceutical companies, academic research institutions, government agencies and public 
and private research institutions.  Not only must we compete with other companies that are focused on gene therapy, but 
any product candidates that we successfully develop and commercialize will compete with existing therapies and new 
therapies that may become available in the future.

Many of our competitors have significantly greater financial resources and expertise in research and development, 

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

There are other organizations working to improve existing therapies or to develop new therapies for our initially 

selected disease indications.  Depending on how successful these efforts are, it is possible they may increase the barriers to 
adoption and success for our product candidates, if approved.  These efforts include two product candidates Applied 
Genetic Technologies Corporation, or AGTC, have in Phase 1/2 clinical trials to treat ACHM related to CNGB3 and
CNGA3, respectively, a product candidate in Phase 1/2 clinical trials by each of Biogen Inc. and 4D Molecular
Therapeutics, Inc. and a program AGTC is running to treat XLRP, as well as Luxturna, marketed by Spark Therapeutics,
Inc. which was purchased by Roche, and has been approved to treat RPE65-associated retinal dystrophy.  We are not 

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aware of any other gene therapy product candidates in clinical development targeting xerostomia.  We are aware of other 
ALS gene therapies utilizing different treatment mechanisms to treat different genetically defined subsets of ALS patients, 
as well as gene therapy product candidates being developed for the treatment of Parkinson’s disease, including those being 
developed by Voyager Therapeutics, Inc., Prevail Therapeutics, Inc. and Axovant Sciences Ltd.

We anticipate that we will face intense and increasing competition as new drugs enter the market and advanced 

technologies become available.  We expect any treatments that we develop and commercialize to compete on the basis of, 
among other things, efficacy, safety, convenience of administration and delivery, price, the level of generic competition and 
the availability of reimbursement from government and other third-party payors.

Intellectual Property

Our success depends in large part upon our ability to secure and maintain proprietary protection for our 
technologies and products and to operate without infringing the proprietary rights of others.  Our policy is to protect our 
proprietary position by, among other methods, filing or collaborating with our licensors to file U.S. and foreign patent 
applications related to our proprietary technology, inventions and improvements that are important to the development and 
implementation of our business.  We also use other forms of protection, such as confidential information and trademark 
protection, particularly where we do not believe patent protection is appropriate or obtainable.  Our patent portfolio 
consists of a combination of issued patents and pending patent applications that are owned or licensed from third parties.

As of December 31, 2020, we own, co-own, have an exclusive license, or an exclusive option to license 200 

United States and foreign issued or allowed patents and 321 patent applications, pending in the United States and 
internationally.  For any individual patent, the term depends on the applicable law in the country in which the patent is 
granted.  In most countries where we have filed patent applications or in-licensed patents and patent applications, patents 
have a term of 20 years from the application filing date or earliest claimed non-provisional priority date.  In the United 
States, the patent term is 20 years but may be shortened if a patent is terminally disclaimed over another patent that expires 
earlier.  The term of a U.S. patent may also be lengthened by a patent term adjustment, in order to address administrative 
delays by the United States Patent and Trademark Office in granting a patent.  In the United States, the term of a patent that 
covers an FDA-approved drug or biologic may be eligible for patent term extension in order to restore the period of a 
patent term lost during the premarket FDA regulatory review process.  The Drug Price Competition and Patent Term 
Restoration Act of 1984, or the Hatch-Waxman Act, permits a patent term extension of up to five years beyond the natural 
expiration of the patent.  The patent term restoration period is generally equal to the regulatory review period for the 
approved product which period occurs after the date the patent is issued, subject to certain exceptions.  Only one patent 
may be extended for a regulatory review period for any product, and the application for the extension must be submitted 
prior to the expiration of the patent.  In the future, we may decide to apply for restoration of patent term for one of our 
currently owned or licensed patents to extend its current expiration date, depending on the expected length of the clinical 
trials and other factors involved in the filing of the relevant Biologics License Application.

Company-Owned Intellectual Property

We own six patent families relating to gene regulation platform technologies developed by us.  The first patent 

family includes one issued patent in the United States and 23 pending patent applications with claims directed to 
compositions of matter and methods of use in the United States, Europe, Australia, Brazil, Canada, China, Hong Kong, 
Japan, Egypt, India, Indonesia, Israel, Republic of Korea, Malaysia, Mexico, New Zealand, Vietnam, African Regional 
IPO, Philippines, Singapore, South Africa and Eurasia (two applications).  Patents issued from this family are expected to 
expire February 2, 2036, not including any patent term adjustments that may extend the patent term in certain jurisdictions.

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The second patent family includes 22 pending patent applications with claims directed to compositions of matter 

and methods of use in the United States, Europe, Australia, Canada, China, India, Japan, Brazil, Egypt, Hong Kong, 
Indonesia, Israel, Republic of Korea, Malaysia, Mexico, New Zealand, Vietnam, African Regional IPO, Philippines, 
Singapore, South Africa and Eurasia.  Patents issued from this family are expected to expire February 2, 2037, not 
including any patent term adjustments that may extend the patent term in certain jurisdictions.

The third patent family includes 22 pending patent applications with claims directed to compositions of matter and 
methods of use in the United States, Europe, Australia, Canada, China, India, Japan, Brazil, Egypt, Hong Kong, Indonesia, 
Israel, Republic of Korea, Malaysia, Mexico, New Zealand, Vietnam, African Regional IPO, Philippines, Singapore, South 
Africa and Eurasia.  Patents issued from this family are expected to expire February 2, 2037, not including any patent term 
adjustments that may extend the patent term in certain jurisdictions.

The fourth patent family includes 22 pending patent applications with claims directed to compositions of matter

and methods of use in the United States, Europe, Australia, Canada, China, Hong Kong, India, Japan, Brazil, Egypt,
Indonesia, Israel, Republic of Korea, Malaysia, Mexico, New Zealand, Vietnam, African Regional IPO, Philippines,
Singapore, South Africa, and Eurasia. Patents issued from this family are expected to expire August 3, 2037, not including
any patent term adjustments that may extend the patent term in certain jurisdictions.

The fifth patent family includes 22 pending patent applications with claims directed to compositions of matter and
methods of use in the United States, Europe, Australia, Canada, China, Hong Kong, India, Japan, Brazil, Egypt, Indonesia,
Israel, Republic of Korea, Malaysia, Mexico, New Zealand, Vietnam, African Regional IPO, Philippines, Singapore, South
Africa, and Eurasia. Patents issued from this family are expected to expire on March 2, 2038, not including any patent term
adjustments that may extend the patent term in certain jurisdictions.

The sixth patent family includes 22 pending patent applications with claims directed to compositions of matter

and methods of use in the United States, Europe, Australia, Canada, China, Hong Kong, India, Japan, Brazil, Egypt,
Indonesia, Israel, Republic of Korea, Malaysia, Mexico, New Zealand, Vietnam, African Regional IPO, Philippines,
Singapore, South Africa, and Eurasia. Patents issued from this family are expected to expire on February 21, 2038, not
including any patent term adjustments that may extend the patent term in certain jurisdictions.

Licensed Intellectual Property

Certain of our issued patents and pending patent applications are exclusively licensed to us from UCL Business,

Plc (“UCLB”), Brandeis University (“Brandeis”) and the National Institute of Dental and Craniofacial Research
(“NIDCR”).

UCLB

The UCLB portfolio includes three licensed patent families relating to our RPE65, CNGA3, and RPGR gene
therapy programs and one optioned patent family relating to our dry AMD gene therapy program with a combined 80
United States and foreign issued patents and 68 pending patent applications.

The first patent family, with claims directed to compositions of matter and methods of use relating to our RPE65

program, and the AAV-RPE65 product candidate includes 39 issued patents in the Unites States, Singapore, Albania,
Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Monaco, the Netherlands, North Macedonia, Norway,
Poland, Portugal, Romania, San Moreno, Serbia, Slovenia, Slovakia, Spain, Sweden, Switzerland, Turkey, and the United
Kingdom and 17 pending patent applications in the United States, Europe, Australia, Canada, China, Hong Kong, India,
Japan, Brazil, Egypt, Israel, Malaysia, Mexico, New Zealand, Nigeria, Philippines, and Thailand.  Patents issued from this 
family are expected to expire February 8, 2036, not including any patent term extensions or adjustments that may extend 
the patent term in certain jurisdictions.

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The second patent family includes 22 pending patent applications with claims directed to compositions of matter
and methods of use relating to our achromatopsia program and the AAV-CNGA3 product candidate in the United States, 
Europe, Australia, Canada, China, Hong Kong, India, Japan, Brazil, Egypt, Indonesia, Israel, Republic of Korea, Malaysia, 
Mexico, New Zealand, Vietnam, African Regional IPO, Philippines, Singapore, South Africa, and Eurasia.  Patents issued 
from this family are expected to expire January 14, 2039, not including any patent term extensions or adjustments that may 
extend the patent term in certain jurisdictions.

The third patent family, with claims directed to compositions of matter and methods of use relating to our retinitis 

pigmentosa program and the AAV-RPGR product candidate, includes 39 issued patent applications in the United States, 
Japan, Albania, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, 
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Monaco, the Netherlands, North 
Macedonia, Norway, Poland, Portugal, Romania, San Moreno, Serbia, Slovenia, Slovakia, Spain, Sweden, Switzerland, 
Turkey, and the United Kingdom and five pending applications in the United States, Europe, Canada, China, and Japan.  
Patents issued from this family are expected to expire July 15, 2035, not including any patent term extensions or 
adjustments that may extend the patent term in certain jurisdictions.

The fourth patent family which we have optioned, with claims directed to compositions of matter and methods of 

use relating to our dry AMD gene therapy program, includes two issued patents in Japan and Singapore and 24 pending 
applications in the United States, Europe, Australia, Canada, China, Hong Kong (two applications), India, Brazil, Egypt, 
Indonesia, Israel, Republic of Korea, Malaysia, Mexico, New Zealand, Nigeria, Vietnam, African Regional IPO, 
Philippines, Singapore, South Africa, Thailand and Eurasia.  Patents issued from this family are expected to expire 
February 19, 2036, not including any patent term extensions or adjustments that may extend the patent term in certain 
jurisdictions.

Brandeis

The licensed Brandeis portfolio includes one patent family with claims directed to compositions of matter and

methods of use relating to our ALS gene therapy program and the AAV-UPF1 product candidate.

This patent family includes 15 issued patents in the United States, Australia, Austria, Belgium, Denmark, France, 

Germany, Ireland, Italy, Netherlands, Norway, Spain, Sweden, Switzerland, and the United Kingdom and five pending 
patent applications in the United States, Europe, Canada and Hong Kong (two applications).  Patents issued from this 
family are expected to expire October 8, 2033, not including any patent term extensions or adjustments that may extend the 
patent term in certain jurisdictions.

National Institute of Dental and Craniofacial Research

The exclusively licensed NIDCR portfolio includes one patent family with claims directed to compositions of 

matter and methods of use relating to our Sjogren’s Syndrome gene therapy program.  This patent family includes 16 
issued patents in the United States, Canada, Australia, Austria, Belgium, Denmark, France, Germany, Ireland, Italy, 
Netherlands, Norway, Spain, Sweden, Switzerland and the United Kingdom.  Patents issued from this family are expected 
to expire August 30, 2033, not including any patent term extensions or adjustments that may extend the patent term in 
certain jurisdictions.

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License Agreements

License Agreements with UCLB

We previously entered into several license agreements with UCLB, covering the following inherited retinal 
disease programs: (a) ACHM caused by mutations in CNGB3; (b) ACHM caused by mutations in CNGA3; (c) XLRP; and 
(d) RPE65-mediated IRD (together, the “Licensed Gene Therapy Programs”).  The terms of these license agreements were 
set forth in (i) the license agreement, dated February 4, 2015, as amended, between Athena Vision Ltd. and UCLB (the 
“First UCLB License Agreement”); (ii) the license agreements, dated July 29, 2017, as amended, between MeiraGTx UK 
II Limited and UCL Business, Plc (the “Second UCLB License Agreement”); and (iii) the license agreement, dated March 
15, 2018, among MeiraGTx Limited, MeiraGTx UK II Limited and UCL Business Plc (the “Third UCLB License 
Agreement” and, collectively, the “prior UCLB license agreements”).  In January and February 2019, we amended and 
restated the prior UCLB license agreements to establish a new standalone license agreement (each, a “Stand-Alone UCLB 
Agreement”) for each of the Licensed Gene Therapy Programs.  We have removed from each of the Stand-alone 
Agreements our obligation to pay UCLB a share of certain sublicensing revenues as was provided under the First UCLB 
License Agreement and have aligned the material terms of the Stand-Alone Agreements to track those under the Third 
UCLB License Agreement as previously disclosed and a summary of which is set forth below as is now reflected in each of 
the Stand-Alone Agreements.

Under the terms of the Third UCLB License Agreement, we paid an initial upfront payment of £6,994, and issued 

to UCLB £100,000 of our ordinary shares.  

Under each of the Stand-Alone UCLB Agreements, UCLB granted us an exclusive, worldwide, and sublicensable

license under certain intellectual property rights controlled by UCLB relating to one of the Licensed Gene Therapy
Programs to develop and commercialize licensed products in a relevant field of gene therapy. We must use diligent efforts
to develop and commercialize the licensed products.

Under the terms of each Stand-Alone UCLB Agreement, we are required to pay UCLB sales milestone payments

of up to a total of £39.8 million in the aggregate and an annual management fee of £50 thousand until certain royalty
payments have been paid. Additionally, pursuant to the Stand-Alone UCLB Agreement related to CNGB3, we paid UCLB
an upfront payment of £1.5 million and issued £1.5 million of the Company’s ordinary shares.

Commencing on the first commercial sale of licensed products under each Stand-Alone UCLB Agreement, we
must make low single-digit percentage royalty payments to UCLB on net sales of such products. Our royalty obligations
under each agreement continue on a licensed product-by-licensed product and country-by-country basis until the latest to
occur of the expiration of the last valid claim of a patent claiming such licensed product in such country, the expiration of
any regulatory exclusivity for all licensed products in such country, or the tenth anniversary of first commercial sale of
such licensed product in such country.

Each Stand-Alone UCLB Agreement will remain in effect on a country-by-country basis until the expiration of

the last payment obligation in such country. Each Stand-Alone UCLB Agreement may be terminated: (a) by either party in
the event of the other party’s material breach that remains uncured for 30 days (or for 14 days in the case of breaches
related to payment obligations), (b) by either party for the other party’s insolvency, (c) immediately by UCLB if we are in
persistent breach of the agreement and the parties fail to agree upon a mechanism to remedy such persistent breach (or we
do not comply with such agreed upon mechanism), or (d) immediately by UCLB if we undergo certain change of control
events or if we enter into a sublicense with certain prohibited persons, which may adversely affect UCL’s and/or UCLB’s
reputation. Each Stand-Alone UCLB Agreement may also be terminated or converted to a non-exclusive license by UCLB
upon three months’ notice if we, based on an independent expert determination, fail to use diligent efforts to develop and
commercially exploit licensed products and do not cure such failure within a certain cure period.

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License Agreement between BRI-Alzan Inc. and Brandeis

In May 2013, BRI-Alzan Inc., or BRI-Alzan, entered into a license agreement with Brandeis, or the Brandeis 

Agreement.  On December 31, 2015, we entered into an Agreement and Plan of Merger, or the BRI-Alzan Merger 
Agreement, with BRI-Alzan, and the Brandeis Agreement was assigned to us as a result of such merger.  Pursuant to the 
terms of the BRI-Alzan Merger Agreement, we agreed to make cash payments to the sellers of BRI-Alzan upon the 
achievement of certain milestones, subject to an aggregate cap of $4,500,000.  In addition, we agreed to make low single-
digit percentage royalty payments to the sellers of BRI-Alzan on net sales of any product for the therapeutic or 
prophylactic treatment of ALS that is covered by a valid claim of the patent rights licensed under the Brandeis Agreement.  
The BRI-Alzan Merger Agreement includes customary confidentiality, indemnification, non-competition and non-
solicitation provisions.

Pursuant to the Brandeis Agreement, Brandeis granted us an exclusive, worldwide license under certain patent

rights with claims directed to compositions of matter and methods of use relating to our ALS gene therapy program and the
AAV-UPF1 product candidate to develop and commercialize licensed products.

We must use commercially reasonable efforts to develop and commercialize licensed products.  We also acquired 

non-exclusive, worldwide licenses to certain know-how controlled by Brandeis to exploit licensed products.  We are 
required to pay Brandeis developmental and regulatory milestone payments of up to a total of $1.0 million in the aggregate.  
We are also required to pay Brandeis annual license maintenance fees ranging from $15,000 to $100,000 depending on the 
development stage of the licensed product.  Commencing on the first commercial sale of licensed products, we must make 
low single-digit percentage royalty payments to Brandeis on net sales of such products.  In addition, we must pay Brandeis 
mid-teen percentages of sublicensing revenues.

The Brandeis Agreement will remain in effect on a country-by-country basis until the earlier of: (a) 1 year after

the date that we, our affiliates or sublicensees last sell any licensed product in such country or (b) until the expiration of the 
last–to-expire of the licensed patent rights in such country.  The Brandeis Agreement may be terminated by Brandeis for 
our insolvency or for our material breach that remains uncured for 60 days (or for 30 days in the case of breaches related to 
payment obligations).  Such material breach may be cured only once in any 12-month period. Brandeis may also terminate 
any license granted under the Brandeis Agreement if we fail to timely achieve certain regulatory milestone events.

Trade Secrets

We also rely on trade secrets, technical know-how and continuing innovation to develop and maintain our 

competitive advantage.  We require inventors who are identified on any company-owned patent applications to assign 
rights to us.  We also rely on confidentiality agreements with our employees, consultants and other advisors to protect our 
proprietary information.  Our policy is to require third parties that receive material confidential information to enter into 
confidentiality agreements with us.

Trademarks

Our trademark MeiraGTx has been registered in the European Union and United States.

Government Regulation and Product Approval

Governmental authorities in the U.S., at the federal, state and local level, and other countries extensively regulate, 
among other things, the research, development, testing, manufacture, labeling, packaging, promotion, storage, advertising, 
distribution, marketing, post-approval monitoring and reporting and export and import of products such as those we are 
developing.  The processes for obtaining regulatory approvals in the United States and in foreign countries 

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and jurisdictions, along with subsequent compliance with applicable statutes and regulations and other regulatory 
authorities, are extensive and require the expenditure of substantial time and financial resources.

FDA Approval Process

We expect our future product candidates to be regulated as biologics.  Biological products, including gene therapy 

products, are subject to extensive regulation by the FDA under the Federal Food, Drug, and Cosmetic Act, or FDCA, and 
the Public Health Service Act, or PHSA, and other federal, state, local and foreign statutes and regulations.  Both the 
FDCA and the PHSA and their corresponding regulations govern, among other things, the research, development, safety, 
testing, packaging, manufacture, storage, recordkeeping, approval, labeling, promotion and marketing, distribution, post-
approval monitoring and reporting, sampling, and import and export of biological products.  

U.S. Biological Products Development Process

Our products must be approved by the FDA through the Biologics License Application, or BLA, process before 

they may be legally marketed in the United States.  The process required by the FDA before a biologic may be marketed in 
the United States generally involves the following:

● completion of extensive nonclinical studies, sometimes referred to as preclinical laboratory tests, and

preclinical studies and applicable requirements for the humane use of laboratory animals and formulation
studies in accordance with applicable regulations, including good laboratory practices, or GLPs;

● submission to the FDA of an investigational new drug application, or IND, which must become effective

before clinical trials may begin;

● approval by an independent Institutional Review Board, or IRB, or ethics committee at each clinical site

before the trial is commenced;

● performance of adequate and well controlled human clinical trials according to the FDA’s regulations

commonly referred to as good clinical practices, or GCPs, and any additional requirements for the protection
of human research subjects and their health information, to establish the safety and efficacy of the proposed
biological product for its intended use;

● submission to the FDA of a BLA for marketing approval that includes substantive evidence of safety, purity,

potency and efficacy 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 studies, 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.  The clinical trial sponsor must submit the results of the preclinical tests, together with 

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manufacturing and controls, information about product chemistry, analytical data, any available clinical data or literature 
and a proposed clinical protocol, to the FDA as part of the IND.  Some preclinical testing, such as reproductive toxicity 
tests and carcinogenicity in animals, may continue even after the IND is submitted.  The IND automatically becomes 
effective 30 days after receipt by the FDA, after which human clinical trials may begin unless the FDA places the clinical 
trial 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 trial can begin.  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, trials may not recommence without FDA authorization and then only under terms authorized by the FDA.  

In addition to the IND submission process, sponsors of certain human clinical trials of cells containing 

recombinant or synthetic nucleic acid molecules, including human gene transfer studies, are subject to evaluation and 
assessment by an institutional biosafety committee, or IBC, a local institutional committee that reviews and oversees 
research utilizing recombinant or synthetic nucleic acid molecules at that institution, pursuant to the National Institutes of 
Health’s Guidelines for Research Involving Recombinant or Synthetic Nucleic Acid Molecules, or NIH Guidelines.  The 
IBC assesses the safety of the research and identifies any potential risk to the public health or the environment, and such 
review may result in some delay before initiation of a clinical trial.  While the NIH Guidelines are not mandatory unless the 
research in question is being conducted at or sponsored by institutions receiving NIH funding of recombinant or synthetic 
nucleic acid molecule research, many companies and other institutions not otherwise subject to the NIH Guidelines 
voluntarily follow them.

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 trial, dosing 
procedures, subject selection and exclusion criteria, the efficacy measurements to be evaluated and the parameters to be 
used to monitor subject safety, including stopping rules that assure a clinical trial 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 trial 
must be reviewed and approved by an independent institutional review board, or IRB, at or servicing each institution at 
which the clinical trial 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 trial subject or his or her legal representative and must monitor the clinical trial until 
completed.  

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

● Phase 1.  The biological product candidate 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.

● Phase 2.  The biological product candidate 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.

● 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.

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In most cases, the FDA requires two adequate and well controlled Phase 3 clinical trials to demonstrate the safety 

and efficacy of a biological product. In some instances, a single Phase 3 trial, together with other confirmatory evidence 
may be sufficient to support a BLA submission.  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.

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 trials, 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 
or permanently discontinue 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 or the clinical trial is not being conducted in accordance with 
FDA regulations.  Similarly, an IRB can suspend or terminate approval of a clinical study at its institution if the clinical 
trial is not being conducted in accordance with the IRB’s requirements or if the biological product candidate has been 
associated with unexpected serious harm to patients.  The FDA and the IRB may also halt, terminate or impose other 
conditions if either believes the patients are subject to unacceptable risk.

There are also requirements governing the reporting of ongoing clinical trials and completed clinical trial results 
to public registries.  Sponsors of clinical trials of FDA-regulated products, including biologics, are required to register and 
disclose certain clinical trial information, which is publicly available at www.clinicaltrials.gov. Information related to the 
product, patient population, phase of investigation, study sites and investigators, and other aspects of the clinical trial is 
then made public as part of the registration.  Sponsors are also obligated to discuss the results of their clinical trials after 
completion.  Disclosure of the results of these trials can be delayed until the new product or new indication being studied 
has been approved.

Concurrent with clinical trials, companies usually complete additional animal trials and must also develop 
additional information about the physical characteristics of the biological product candidate 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 PHSA 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 candidate, FDA approval of a BLA must be obtained 

before commercial marketing and distribution of the biological product.  The BLA must include results of product 
development, laboratory and animal trials, human trials, information on the manufacture, pharmacology, chemistry and 
controls 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 

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of the biological product candidate for the claimed indications in all relevant pediatric subpopulations and to support 
dosing and administration for each pediatric subpopulation for which the product is safe and effective.

The Food and Drug Administration Safety and Innovation Act, or FDASIA, enacted in 2012, requires that a 
sponsor who is planning to submit a marketing application for a drug or biological product that includes a new active 
ingredient, new indication, new dosage form, new dosing regimen or new route of administration submit an initial Pediatric 
Study Plan, or PSP, within sixty days after an end-of-Phase 2 meeting or as may be agreed between the sponsor and FDA.  
The initial PSP must include, among other things, an outline of the pediatric study or studies that the sponsor plans to 
conduct, including to the extent practicable study objectives and design, age groups, relevant endpoints and statistical 
approach, or a justification for not including such detailed information, and any request for a deferral of pediatric 
assessments or a full or partial waiver of the requirement to provide data from pediatric studies along with supporting 
information, along with any other information specified in FDA regulations.  The FDA and the sponsor must reach 
agreement on the PSP.  A sponsor can submit amendments to an agreed-upon initial PSP at any time if changes to the 
pediatric plan need to be considered based on data collected from nonclinical studies, early phase clinical trials, and/or 
other clinical development programs.  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. 

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 program fee for products.  
Fee waivers or reductions are available in certain circumstances, including a waiver of the application fee for the first 
human drug 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 is also subject to an initial review 
before the FDA accepts it for filing.  Once the submission is accepted for filing, the FDA begins an in-depth substantive 
review of the BLA.  The FDA’s goal is to complete the review of standard BLAs within ten months after it accepts an 
application for filing, or, if the application qualifies for priority review, six months after the FDA accepts the application 
for filing.  In both standard and priority reviews, the review process is often significantly extended by FDA requests for 
additional information or clarification. 

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 requirements 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 candidate.  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 sites to assure that the clinical trials were 
conducted in compliance with IND study requirements and GCP requirements.  To assure cGMP and GCP 

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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.  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, or when, those deficiencies have been addressed to the FDA’s satisfaction in a resubmission of the BLA, 
the FDA will issue an approval letter.  Under the current PDUFA guidelines, the FDA has committed to reviewing such 
resubmissions in two or six months of receipt depending on the type of information included.

If regulatory approval of a product is granted, such approval will be granted for particular indications and may 

entail limitations on the indicated uses for which such product may be marketed.  For example, the FDA may approve the 
BLA with a REMS, to ensure the benefits of the product outweigh its potential risks.  A REMS is a safety strategy to 
manage a known or potential serious risk associated with a medicine and to enable patients to have continued access to 
such medicines by managing their safe use, and could include medication guides, physician communication plans, or 
elements to assure safe use, such as restricted distribution methods, patient registries and other risk minimization tools.  
The FDA also may condition approval on, among other things, changes to proposed labeling or the development of 
adequate controls and specifications.  The requirement for a REMS can materially affect the potential market and 
profitability of the product.

Once approved, the FDA may withdraw the product approval if compliance with pre- and post-marketing 

requirements is not maintained or if problems occur after the product reaches the marketplace.  Changes to some of the 
conditions established in an approved BLA, including changes in indications, product labeling, manufacturing processes or 
facilities, require submission and FDA approval of a new BLA or BLA supplement before the change can be implemented.  
A BLA supplement for a new indication typically requires clinical data similar to that in the original application, and the 
FDA uses the same procedures and actions in reviewing BLA supplements as it does in reviewing BLAs.  The FDA may 
require one or more Phase 4 post-market studies or surveillance to further assess and monitor the product’s safety and 
effectiveness after commercialization, and may limit further marketing of the product based on the results of these post-
marketing studies.

Orphan Drug Designation

The FDA may grant orphan drug designation to drugs or biologics intended to treat a rare disease or condition that 

affects fewer than 200,000 individuals in the United States, or if it affects more than 200,000 individuals in the United 
States, there is no reasonable expectation that the cost of developing and marketing the drug or biologic for this type of 
disease or condition will be recovered from its sales in the United States.  Orphan drug 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 drug designation does not convey any advantage in or 
shorten the duration of the regulatory review and approval process.

In the United States, orphan drug designation entitles a party to financial incentives such as opportunities for grant 

funding towards clinical trial costs, tax advantages and BLA user-fee waivers.  In addition, if a product receives the first 
FDA approval for the indication for which it has orphan designation, the product is entitled to orphan drug exclusivity, 
which means the FDA may not approve any other application, including a full BLA, to market the same drug or biologic 
for the same indication for a period of seven years, except in limited circumstances, such as a showing of clinical 
superiority over the product with orphan exclusivity or where the manufacturer with orphan exclusivity is 

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unable to assure sufficient quantities of the approved orphan-designated product.  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 drug or 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.  In 
addition, exclusive marketing rights in the United States may be lost if the FDA later determines that the request for 
designation was materially defective or if the manufacturer is unable to assure sufficient quantities of the product to meet 
the needs of patients with the rare disease or condition.

Expedited Development and Review Programs

The FDA has a Fast Track program that is intended to expedite or facilitate the process for reviewing new 
biological products that meet certain criteria.  Specifically, new biological products are eligible for Fast Track designation 
if they are intended to treat a serious or life-threatening disease or condition and demonstrate the potential to address unmet 
medical needs for the disease or condition.  Fast Track designation applies to the combination of the product and the 
specific indication for which it is being studied.  The sponsor of a new biologic may request that the FDA designate the 
biologic as a Fast Track product at any time during clinical development of the product.  The FDA must determine if the 
biologic product candidate qualifies for Fast Track designation within 60 days of receipt of the sponsor’s request.  Unique 
to a Fast Track product, the FDA may consider for review sections of the marketing application on a rolling basis before 
the complete application is submitted, if the sponsor provides a schedule for the submission of the sections of the 
application, the FDA agrees to accept sections of the application and determines that the schedule is acceptable, and the 
sponsor pays any required user fees upon submission of the first section of the application.

Any product submitted to the FDA for marketing, including under a Fast Track program, may be eligible for other 
types of FDA programs intended to expedite development and review, such as priority review and accelerated approval, or 
Breakthrough Therapy Designation.  An application seeking marketing approval for a biologic product is eligible for 
priority review if the biologic has the potential to provide safe and effective therapy where no satisfactory alternative 
therapy exists or there is a significant improvement in the treatment, diagnosis or prevention of a disease compared to 
marketed products.  The FDA will attempt to direct additional resources to the evaluation of an application for a new 
biological product designated for priority review in an effort to facilitate the review.  Additionally, a product may be 
eligible for accelerated approval.  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 be eligible for 
accelerated approval, which means that they may be approved on the basis of adequate and well controlled clinical trials 
establishing that the product has an effect on a surrogate endpoint that is reasonably likely to predict a clinical benefit, or 
on the basis of an effect on a clinical endpoint other than survival or irreversible 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 that a sponsor of a biological product subject to accelerated 
approval perform adequate and well-controlled post-marketing Phase 4 clinical trials.  Failure to conduct required post-
approval trials, or to confirm a clinical benefit during post-marketing trials, will allow the FDA to withdraw the approved 
biologic product from the market on an expedited basis.  In addition, the FDA currently requires as a condition for 
accelerated approval pre-approval of promotional materials, which could adversely impact the timing of the commercial 
launch of the product.  Fast Track designation, priority review and accelerated approval do not change the standards for 
approval but may expedite the development or approval process.

In addition, under the provisions of FDASIA, the FDA established a Breakthrough Therapy Designation which is 
intended to expedite the development and review of products that treat serious or life-threatening diseases or conditions.  A 
breakthrough therapy is defined as a drug 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 

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may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, such as 
substantial treatment effects observed early in clinical development.  The designation includes all of the features of Fast 
Track designation, as well as more intensive FDA interaction and guidance.  The Breakthrough Therapy Designation is a 
distinct status from both accelerated approval and priority review, but these can also be granted to the same product 
candidate if the relevant criteria are met.  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.  All requests for Breakthrough Therapy Designation will be reviewed within 60 days of receipt, and FDA will 
either grant or deny the request.

Furthermore, as part of its implementation of the 21st Century Cures Act, the FDA established the Regenerative 

Medicine Advanced Therapy, or RMAT, designation, to facilitate an efficient development program for, and expedite 
review of, certain drugs and biological products.  A biological product is eligible for RMAT designation if it qualifies as a 
RMAT, which is defined as a cell therapy, therapeutic tissue engineering product, human cell and tissue product, or any 
combination product using such therapies or products, with limited exceptions, and is intended to treat, modify, reverse, or 
cure a serious or life-threatening disease or condition and for which preliminary clinical evidence indicates that the 
biological product has the potential to address unmet medical needs for such a disease or condition.  Like Breakthrough 
Therapy Designation, RMAT designation provides potential benefits that include more frequent meetings with FDA to 
discuss the development plan for the product candidate, and eligibility for rolling review and priority review.  Products 
granted RMAT designation may also be eligible for accelerated approval on the basis of a surrogate or intermediate 
endpoint reasonably likely to predict long-term clinical benefit, or reliance upon data obtained from a meaningful number 
of sites, including through expansion to additional sites.  RMAT-designated products that receive accelerated approval may, 
as appropriate, fulfill their post-approval requirements through the submission of clinical evidence, clinical trials, patient 
registries, or other sources of real world evidence (such as electronic health records); through the collection of larger 
confirmatory data sets; or via post-approval monitoring of all patients treated with such therapy prior to approval of the 
therapy.

Fast Track designation, priority review, accelerated approval, Breakthrough Therapy Designation and RMAT 

designation do not change the standards for approval but may expedite the development or approval process.  Even if we 
receive one of these designations for our product candidates, the FDA may later decide that our product candidates no 
longer meets the conditions for qualification.  In addition, receiving these designations may not provide us with a material 
commercial advantage.

Post-Approval Requirements

Rigorous and extensive FDA regulation of biological products continues after approval, particularly with respect 
to cGMP requirements.  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.

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The FDA may require one or more Phase 4 post-market trials or surveillance to further assess and monitor the 
product’s safety and effectiveness after commercialization, and may limit further marketing of the product based on the 
results of these post-marketing studies.  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.  Biologics may be marketed only for 
the approved indications and in accordance with the provisions of the approved labeling.

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, 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. 

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 cGMP requirements and 
other laws.  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.

Biosimilars and Exclusivity

The Biologics Price Competition and Innovation Act of 2009, or BPCIA, created an abbreviated approval 
pathway for biological products that are biosimilar to or interchangeable with an FDA-licensed reference biological 
product.  To date, only a handful of biosimilars have been licensed under the BPCIA, and numerous biosimilars have been 
approved in Europe.  The FDA has issued several guidance documents outlining an approach to review and approval of 
biosimilars.

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.  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 in any given patient and, 
for products that are administered multiple times to an individual, the biologic and the reference biologic may be alternated 
or switched after one has been previously administered without increasing safety risks or risks of diminished efficacy 
relative to exclusive use of the reference biologic.  However, complexities associated with the larger, and often more 
complex, structures of biological products, as well as the processes by which such products are manufactured, pose 
significant hurdles to implementation of the abbreviated approval pathway that are still being worked out by the FDA.

Under the BPCIA, an application for a biosimilar product may not be submitted to the FDA until four years 
following the date that the reference product was first licensed by the FDA.  In addition, the approval of a biosimilar 
product may not be made effective by the FDA until 12 years from the date on which the reference product was first 
licensed.  During this 12-year period of exclusivity, another company may still market a competing version of the 

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reference product if the FDA approves a full BLA for the competing product containing the sponsor’s own preclinical data 
and data from adequate and well-controlled clinical trials to demonstrate the safety, purity and potency of their product.  
The BPCIA also created certain exclusivity periods for biosimilars approved as interchangeable products.  

A biological product can also 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.

Other Healthcare Laws and Compliance Requirements

Pharmaceutical companies are subject to additional healthcare regulation and enforcement by the federal 

government and by authorities in the states and foreign jurisdictions in which they conduct their business, which may 
constrain the financial arrangements and relationships through which we conduct our research, as well as, sell, market and 
distribute any products for which we obtain marketing approval. Such laws include, without limitation, federal and state 
anti-kickback, fraud and abuse, false claims, data privacy and security and physician and other healthcare provider 
payment transparency laws and regulations.  If their operations are found to be in violation of any of such laws or any other 
governmental regulations that apply, they may be subject to penalties, including, without limitation, administrative, civil 
and criminal penalties, damages, fines, disgorgement, the curtailment or restructuring of operations, exclusion from 
participation in federal and state healthcare programs, integrity oversight and reporting obligations to resolve allegations of 
non-compliance and imprisonment.

Coverage and Reimbursement

Significant uncertainty exists as to the coverage and reimbursement status of any pharmaceutical or biological 

product for which we obtain regulatory approval.  Sales of any product depend, in part, on the extent to which such product 
will be covered by third-party payors, such as federal, state, and foreign government healthcare programs, commercial 
insurance and managed healthcare organizations, and the level of reimbursement for such product by third-party payors.  
Decisions regarding the extent of coverage and amount of reimbursement to be provided are made on a plan-by-plan basis.  
For products administered under the supervision of a physician, obtaining coverage and adequate reimbursement may be 
particularly difficult because of the higher prices often associated with such drugs.  Additionally, separate reimbursement 
for the product itself or the treatment or procedure in which the product is used may not be available, which may impact 
physician utilization.

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.  Third party payors are increasingly challenging the prices charged for medical products 
and services, examining the medical necessity and reviewing the cost effectiveness of pharmaceutical or biological 
products, medical devices and medical services, in addition to questioning safety and efficacy.  Adoption of price controls 
and cost-containment measures, and adoption of more restrictive policies in jurisdictions with existing controls and 
measures, could further limit sales of any product.  Decreases in third-party reimbursement for any product or a decision by 
a third-party payor not to cover a product could reduce physician usage and patient demand for the product.

Healthcare Reform

The United States and some foreign jurisdictions are considering or have enacted a number of reform proposals to 

change the healthcare system.  There is significant interest in promoting changes in healthcare systems with the stated 
goals of containing healthcare costs, improving quality or expanding access.  In the United States, the pharmaceutical 
industry has been a particular focus of these efforts and has been significantly affected by federal and state legislative 
initiatives, including those designed to limit the pricing, coverage, and reimbursement of pharmaceutical and 

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biopharmaceutical products, especially under government-funded health care programs, and increased governmental 
control of drug pricing.

In March 2010, the Patient Protection and Affordable Care Act, or the ACA, was signed into law, which 
substantially changed the way healthcare is financed by both governmental and private insurers in the United States, and 
significantly affected the pharmaceutical industry.  The ACA contains a number of provisions of particular import to the 
pharmaceutical and biotechnology industries, including, but not limited to, those governing enrollment in federal 
healthcare programs, 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, and annual fees based on 
pharmaceutical companies’ share of sales to federal health care programs.  Since its enactment, there have been judicial, 
Congressional and executive branch challenges to certain aspects of the ACA.  For example, the Tax Cuts and Jobs Act of 
2017 was enacted, which, among other things, removed penalties for not complying with ACA’s individual mandate to 
carry health insurance.  On December 14, 2018, a Texas U.S. District Court Judge ruled that the ACA is unconstitutional in 
its entirety because the “individual mandate” was repealed by Congress as part of the Tax Cuts and Jobs Act of 2017.  On 
December 18, 2019, the U.S. Court of Appeals for the 5th Circuit upheld the District Court’s decision that the individual 
mandate was unconstitutional but remanded the case back to the District Court to determine whether the remaining 
provisions of the ACA are invalid as well. On March 2, 2020, the U.S. Supreme Court granted the petitions for writs of 
certiorari to review this case.  The Supreme Court heard the case in November 2020, with a decision expected by June 
2021. It is unclear how this decision or other efforts, if any, to challenge, repeal or replace the ACA will impact the law.

Other legislative changes have been proposed and adopted since the ACA was enacted, including aggregate 

reductions of Medicare payments to providers of 2% per fiscal year, which was temporarily suspended from May 1, 2020 
through March 31, 2021, and reduced payments to several types of Medicare providers.  Moreover, there has recently been 
heightened governmental scrutiny over the manner in which manufacturers set prices for their marketed products, which 
has resulted in several Congressional inquiries and proposed and enacted federal and state legislation designed to, among 
other things, bring more transparency to product pricing, review the relationship between pricing and manufacturer patient 
programs, and reform government program reimbursement methodologies for drug products.  The likelihood of 
implementation of any of these reform initiatives is uncertain, particularly in light of the new Biden administration.  At the 
state level, legislatures have increasingly passed legislation and implemented regulations designed to control 
pharmaceutical product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain 
product access and marketing cost disclosure and transparency measures, and, in some cases, designed to encourage 
importation from other countries and bulk purchasing.

Additionally, on May 30, 2018, the Trickett Wendler, Frank Mongiello, Jordan McLinn, and Matthew Bellina 
Right to Try Act of 2017, or the Right to Try Act, was signed into law.  The law, among other things, provides a federal 
framework for certain patients to access certain investigational new drug products that have completed a Phase 1 clinical 
trial and that are undergoing investigation for FDA approval.  Under certain circumstances, eligible patients can seek 
treatment without enrolling in clinical trials and without obtaining FDA permission under the FDA expanded access 
program.  There is no obligation for a pharmaceutical manufacturer to make its drug products available to eligible patients 
as a result of the Right to Try Act.

U.S. Data Privacy and Security

In the United States, numerous federal and state laws and regulations, including data breach notification laws,

health information privacy and security laws, and federal and state consumer protection laws and regulations (e.g., Section
5 of the Federal Trade Commission Act), that govern the collection, use, disclosure, and protection of health-related and
other personal information could apply to our operations or the operations of our partners. For example, the Health
Insurance Portability and Accountability Act of 1996, or HIPAA, as amended by the Health Information Technology for
Economic and Clinical Health Act of 2009, and their respective implementing regulations, impose obligations on “covered
entities,” including certain health care providers, health plans, and health care clearinghouses,

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and their respective “business associates” that create, receive, maintain or transmit individually identifiable health 
information for or on behalf of a covered entity, as well as their covered subcontractors with respect to safeguarding the 
privacy, security and transmission of individually identifiable health information. In addition, certain state laws govern the 
privacy and security of personal information, including health-related information in certain circumstances, some of which 
are more stringent than HIPAA and many of which differ from each other in significant ways and may not have the same 
effect, thus complicating compliance efforts. Failure to comply with these laws, where applicable, can result in the 
imposition of significant civil and/or criminal penalties and private litigation.  Privacy and security laws, regulations, and 
other obligations are constantly evolving, may conflict with each other to complicate compliance efforts, and can result in 
investigations, proceedings, or actions that lead to significant civil and/or criminal penalties and restrictions on data 
processing.

U.S. Foreign Corrupt Practices Act

The U.S. Foreign Corrupt Practices Act of 1977, or FCPA, prohibits U.S. corporations and individuals from 
engaging in certain activities to obtain or retain business or secure any improper advantage, 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 
employee or official of a foreign government or public international organization, or political party, political party official, 
or political candidate in an attempt to obtain or retain business or to otherwise influence a person working in an official 
capacity.  The scope of the FCPA also includes employees and officials of state-owned or controlled enterprises, which 
may include healthcare professionals in many countries.  Equivalent laws have been adopted in other foreign countries that 
impose similar obligations.

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. 
In addition, ethical, social and legal concerns about gene therapy, genetic testing, genetic research and gene-editing 
technology, could result in additional regulations restricting or prohibiting the processes we may use.

Whether or not we obtain FDA approval of 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.  
The requirements and process governing the conduct of clinical trials, product licensing, pricing and reimbursement vary 
from country to country.  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.

Clinical Trials

Certain countries outside of the United States have a similar process that requires the submission of a clinical trial 

application, or CTA, much like the IND prior to the commencement of human clinical trials.  In the European Union, or 
EU, for example, a CTA must be submitted to each country’s national health authority and an independent ethics 
committee, much like the FDA and the IRB, respectively.  Once the CTA is approved by the national health authority and 
the ethics committee has granted a positive opinion in relation to the conduct of the trial in the relevant member state(s) in 
accordance with a country’s requirements, clinical trial development may proceed. 

Clinical trials of medicinal products in the EU must be conducted in accordance with EU and national regulations 

and the International Conference on Harmonization, or ICH, guidelines on GCPs, as well as the applicable regulatory 
requirements and the ethical principles that have their origin in the Declaration of Helsinki.  Additional GCP guidelines 
from the European Commission, focusing in particular on traceability, apply to clinical trials of ATMPs.  If the sponsor of 
the clinical trial is not established within the EU, it must appoint an entity within the EU to act as its legal 

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representative.  The sponsor must take out a clinical trial insurance policy, and in most EU countries, the sponsor is liable 
to provide ‘no fault’ compensation to any study subject injured in the clinical trial.

Prior to commencing a clinical trial, the sponsor must obtain a clinical trial authorization from the competent 
authority, and a positive opinion from an independent ethics committee.  The CTA must include, among other things, a 
copy of the trial protocol and an investigational medicinal product dossier containing information about the manufacture 
and quality of the medicinal product under investigation.  Currently, clinical trial authorization applications must be 
submitted to the competent authority in each EU member state in which the trial will be conducted.  Under the new 
Regulation on Clinical Trials, which is currently expected to take effect in 2021, there will be a centralized application 
procedure where one national authority takes the lead in reviewing the application and the other national authorities have 
only a limited involvement.  Any substantial changes to the trial protocol or other information submitted with the CTA 
must be notified to or approved by the relevant competent authorities and ethics committees.  Medicines used in clinical 
trials must be manufactured in accordance with GMP.  Other national and EU-wide regulatory requirements may also 
apply.

During the development of a medicinal product, the EMA and national regulators within the EU provide the 

opportunity for dialogue and guidance on the development program.  At the EMA level, this is usually done in the form of 
scientific advice, which is given by the Scientific Advice Working Party of the Committee for Medicinal Products for 
Human Use, or CHMP.  A fee is incurred with each scientific advice procedure.  Advice from the EMA is typically 
provided based on questions concerning, for example, quality (chemistry, manufacturing and controls testing), nonclinical 
testing and clinical trials, and pharmacovigilance plans and risk-management programs.  Advice is not legally binding with 
regard to any future marketing authorization application of the product concerned.

Marketing Authorizations

In the EU, medicinal products can only be placed on the market after obtaining a Marketing Authorization, or 

MA. To obtain regulatory approval of an investigational biological product in the EU, we must submit a marketing 
authorization application, or MAA.  The application used to file the BLA in the United States is similar to that required in 
the EU, with the exception of, among other things, country-specific document requirements.  The process for doing this 
depends, among other things, on the nature of the medicinal product.

The centralized procedure results in a single MA, issued by the European Commission, based on the opinion of 
the CHMP of the EMA which is valid across the entire territory of the EU.  The centralized procedure is compulsory for 
human drugs that are: (i) derived from biotechnology processes, such as genetic engineering, (ii) contain a new active 
substance indicated for the treatment of certain diseases, such as HIV/AIDS, cancer, diabetes, neurodegenerative diseases, 
autoimmune and other immune dysfunctions and viral diseases, (iii)  designated orphan medicines and (iv) advanced-
therapy medicines, such as gene therapy, somatic cell therapy or tissue-engineered medicines.  The centralized procedure 
may at the request of the applicant also be used in certain other cases.  Therefore, the centralized procedure would be 
mandatory for the products we are developing.

The Committee for Advanced Therapies, or CAT, is responsible in conjunction with the CHMP for the evaluation 

of advanced therapy medicinal products, or ATMPs.  The CAT is primarily responsible for the scientific evaluation of 
ATMPs and prepares a draft opinion on the quality, safety and efficacy of each ATMP for which an MAA is submitted.  
The CAT’s opinion is then taken into account by the CHMP when giving its final recommendation regarding the 
authorization of a product in view of the balance of benefits and risks identified.  Although the CAT’s draft opinion is 
submitted to the CHMP for final approval, the CHMP may depart from the draft opinion, if it provides detailed scientific 
justification.  The CHMP and CAT are also responsible for providing guidelines on ATMPs and have published numerous 
guidelines, including specific guidelines on gene therapies and cell therapies.  These guidelines provide additional 
guidance on the factors that the EMA will consider in relation to the development and evaluation of ATMPs and include, 
among other things, the preclinical studies required to characterize ATMPs; the manufacturing and control information that 
should be submitted in an MAA; and post-approval measures required to monitor patients and 

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evaluate the long term efficacy and potential adverse reactions of ATMPs.  Although these guidelines are not legally 
binding, we believe that our compliance with them is likely necessary to gain and maintain approval for any of our product 
candidates.

Under the centralized procedure, the maximum timeframe for the evaluation of an MAA by the EMA is 210 days.  

This excludes so-called clock stops, during which additional written or oral information is to be provided by the applicant 
in response to questions asked by the CHMP.  At the end of the review period, the CHMP provides an opinion to the 
European Commission.  If this opinion is favorable, the Commission may then adopt a decision to grant an MA.  

MAs have an initial duration of five years. After these five years, the authorization may be renewed on the basis
of a reevaluation of the risk-benefit balance. Once renewed, the MA is valid for an unlimited period unless the European
Commission or the national competent authority decides, on justified grounds relating to pharmacovigilance, to proceed
with one additional five-year renewal

In exceptional cases, the CHMP might perform an accelerated review of an MAA in no more than 150 days (not 

including clock stops).  Innovative products that target an unmet medical need and are expected to be of major public 
health interest may be eligible for a number of expedited development and review programs, such as the PRIME scheme, 
which provides incentives similar to the Breakthrough Therapy Designation in the U.S.  PRIME is a voluntary scheme 
aimed at enhancing the EMA’s support for the development of medicines that target unmet medical needs.  It is based on 
increased interaction and early dialogue with companies developing promising medicines, to optimize their product 
development plans and speed up their evaluation to help them reach patients earlier.  Product developers that benefit from 
PRIME designation can expect to be eligible for accelerated assessment but this is not guaranteed.  The benefits of a 
PRIME designation includes the appointment of a rapporteur from the CHMP before submission of an MAA, early 
dialogue and scientific advice at key development milestones, and the potential to qualify products for accelerated review 
earlier in the application process.

The European Commission may grant a so-called “conditional marketing authorization” prior to obtaining the 

comprehensive clinical data required for an application for a full MA.  Such conditional MAs may be granted for product 
candidates (including medicines designated as orphan medicinal products), if (i) the risk-benefit balance of the product 
candidate is positive, (ii) it is likely that the applicant will be in a position to provide the required comprehensive clinical 
trial data, (iii) the product fulfills an unmet medical need and (iv) the benefit to public health of the immediate availability 
on the market of the medicinal product concerned outweighs the risk inherent in the fact that additional data are still 
required.  A conditional MA may contain specific obligations to be fulfilled by the MA holder, including obligations with 
respect to the completion of ongoing or new studies, and with respect to the collection of pharmacovigilance data.  
Conditional MAs are valid for one year, and may be renewed annually, if the risk-benefit balance remains positive, and 
after an assessment of the need for additional or modified conditions and/or specific obligations.  The MA can be converted 
into a standard MA once the MA holder fulfils the obligations that were imposed and the complete data confirm that the 
medicine's benefits continue to outweigh its risks. The timelines for the centralized procedure described above also apply 
with respect to the review by the CHMP of applications for a conditional MA.

The European Commission may also grant a so-called “marketing authorization under exceptional circumstances”.  

Such MA is intended for products for which the applicant can demonstrate that it is unable to provide comprehensive data 
on the efficacy and safety under normal conditions of use even after the product has been authorized, because the 
indications for which the product in question is intended are encountered so rarely that the applicant cannot reasonably be 
expected to provide comprehensive evidence, or in the present state of scientific knowledge, comprehensive information 
cannot be provided, or it would be contrary to generally accepted principles of medical ethics to collect such information.  
Consequently, MAs under exceptional circumstances may be granted subject to certain specific obligations, which may 
include the following:

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● the applicant must complete an identified program of studies within a time period specified by the competent

authority, the results of which form the basis of a reassessment of the benefit/risk profile;

● the medicinal product in question may be supplied on medical prescription only and may in certain cases be

administered only under strict medical supervision, possibly in a hospital and in the case of a radio-
pharmaceutical, by an authorized person; and

● the package leaflet and any medical information must draw the attention of the medical practitioner to the
fact that the particulars available concerning the medicinal product in question are as yet inadequate in
certain specified respects.

A MA under exceptional circumstances is subject to annual review to reassess the risk-benefit balance in an 
annual reassessment procedure.  Continuation of the authorization is linked to the annual reassessment and a negative 
assessment could potentially result in the MA being suspended or revoked.  The renewal of a MA of a medicinal product 
under exceptional circumstances, however, follows the same rules as a “normal” MA.  Thus, a MA under exceptional 
circumstances is granted for an initial five years, after which the authorization will become valid indefinitely, unless the 
EMA decides that safety grounds merit one additional five-year renewal.  A MA under exceptional circumstances should 
not be granted when a conditional MA is more appropriate.

The EU medicines rules expressly permit the EU member states to adopt national legislation prohibiting or 

restricting the sale, supply or use of any medicinal product containing, consisting of or derived from a specific type of 
human or animal cell, such as embryonic stem cells.  While the products we have in development do not make use of 
embryonic stem cells, it is possible that the national laws in certain EU member states may prohibit or restrict us from 
commercializing our products, even if they have been granted an MA.

Data and Marketing Exclusivity

The EU also provides opportunities for market exclusivity.  MAAs for generic medicinal products do not need to 

include the results of preclinical and clinical trials, but instead can refer to the data included in the MA of a reference 
product for which regulatory data exclusivity has expired.  Upon receiving marketing authorization, new chemical entities 
generally receive eight years of data exclusivity and an additional two years of market exclusivity.  If granted, data 
exclusivity prevents regulatory authorities in the EU from referencing the innovator’s data to assess a generic or biosimilar 
application.  During the additional two-year period of market exclusivity, a generic marketing authorization can be 
submitted, and the innovator’s data may be referenced, but no generic or biosimilar product can be marketed until the 
expiration of the market exclusivity.  The overall ten-year market exclusivity period may be extended to a maximum of 
eleven years if during the first eight years a new therapeutic indication with significant clinical benefit over existing 
therapies is approved. However, there is no guarantee that a product will be considered by the EU regulatory authorities to 
be a new chemical entity, and products may not qualify for data exclusivity.

There is a special regime for biosimilars, or biological medicinal products that are similar to a reference medicinal 

product but that do not meet the definition of a generic medicinal product, for example, because of differences in raw 
materials or manufacturing processes.  For such products, the results of appropriate preclinical or clinical trials must be 
provided, and guidelines from the EMA detail the type of quantity of supplementary data to be provided for different types 
of biological product.  There are no such guidelines for complex biological products, such as gene or cell therapy medicinal 
products, and so it is unlikely that biosimilars of those products will currently be approved in the EU.  However, guidance 
from the EMA states that they will be considered in the future in light of the scientific knowledge and regulatory 
experience gained at the time.

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Orphan Medicinal Products

Products receiving orphan designation in the EU can receive ten years of market exclusivity.  During the ten-year 
market exclusivity period once they are authorized as orphan medicines, the EMA cannot accept another application for a 
MA, or grant a MA or accept an application to extend an existing MA, for the same therapeutic indication, in respect of a 
similar medicinal product.  An orphan medicinal product can also obtain an additional two years of market exclusivity in 
the EU for pediatric studies.  No extension to any supplementary protection certificate can be granted on the basis of 
pediatric studies for orphan indications.

The criteria for designating an “orphan medicinal product” in the EU are similar in principle to those in the United 
States.  A medicinal product may be designated as orphan if (1) it is intended for the diagnosis, prevention or treatment of a 
life-threatening or chronically debilitating condition; (2) either (a) such condition affects no more than five in 10,000 
persons in the EU when the application is made, or (b) the product, without the benefits derived from orphan status, would 
not generate sufficient return in the EU to justify investment; and (3) there exists no satisfactory method of diagnosis, 
prevention or treatment of such condition authorized for marketing in the EU, or if such a method exists, the product will 
be of significant benefit to those affected by the condition.  Orphan medicinal products are eligible for financial incentives 
such as reduction of fees or fee waivers.  The application for orphan drug designation must be submitted before the MAA.  
The applicant will receive a fee reduction for the MAA if the orphan drug designation has been granted, but not if the 
designation is still pending at the time the MA is submitted.  Orphan drug designation does not convey any advantage in, or 
shorten the duration of, the regulatory review and approval process.

The ten-year market exclusivity may be reduced to six years if, at the end of the fifth year, it is established that the 

product no longer meets the criteria for orphan designation, for example, if the product is sufficiently profitable not to 
justify maintenance of market exclusivity.  Additionally, a MA may be granted to a similar product for the same indication 
at any time if:

● the second applicant can establish that its product, although similar, is safer, more effective or otherwise

clinically superior;

● the applicant consents to a second orphan medicinal product application; or

● the applicant cannot supply enough orphan medicinal product.

Pediatric Development

In the EU, MAAs for new medicinal products have to include the results of trials conducted in the pediatric 
population, in compliance with a pediatric investigation plan, or PIP, agreed with the EMA’s Pediatric Committee, or 
PDCO.  The PIP sets out the timing and measures proposed to generate data to support a pediatric indication of the drug for 
which an MA is being sought.  The PDCO can grant a deferral of the obligation to implement some or all of the measures 
of the PIP until there are sufficient data to demonstrate the efficacy and safety of the product in adults.  Further, the 
obligation to provide pediatric clinical trial data can be waived by the PDCO when these data are not needed or appropriate 
because the product is likely to be ineffective or unsafe in children, the disease or condition for which the product is 
intended occurs only in adult populations, or when the product does not represent a significant therapeutic benefit over 
existing treatments for pediatric patients.  Once the MA is obtained in all EU member states and study results are included 
in the product information, even when negative, the product is eligible for a six-months supplementary protection 
certificate extension (if any is in effect at the time of approval) or, in the case of orphan medicinal products, a two year
extension of the orphan market exclusivity is granted.

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Post-Approval Requirements

Similar to the United States, both marketing authorization holders and manufacturers of medicinal products are 
subject to comprehensive regulatory oversight by the EMA, the European Commission and/or the competent regulatory 
authorities of the member states. The holder of a MA must establish and maintain a pharmacovigilance system and appoint 
an individual qualified person for pharmacovigilance who is responsible for oversight of that system.  Key obligations 
include expedited reporting of suspected serious adverse reactions and submission of periodic safety update reports, or 
PSURs.

All new MAAs must include a risk management plan, or RMP, describing the risk management system that the 
company will put in place and documenting measures to prevent or minimize the risks associated with the product.  The 
regulatory authorities may also impose specific obligations as a condition of the MA.  Such risk-minimization measures or 
post-authorization obligations may include additional safety monitoring, more frequent submission of PSURs, or the 
conduct of additional clinical trials or post-authorization safety studies.  

The advertising and promotion of medicinal products is also subject to laws concerning promotion of medicinal 

products, interactions with physicians, misleading and comparative advertising and unfair commercial practices. All 
advertising and promotional activities for the product must be consistent with the approved summary of product 
characteristics, and therefore all off-label promotion is prohibited.  Direct-to-consumer advertising of prescription 
medicines is also prohibited in the EU.  Although general requirements for advertising and promotion of medicinal 
products are established under EU directives, the details are governed by regulations in each member state and can differ 
from one country to another.

Failure to comply with EU and member state laws that apply to the conduct of clinical trials, manufacturing
approval, MA of medicinal products and marketing of such products, both before and after grant of the MA, manufacturing
of pharmaceutical products, statutory health insurance, bribery and anti-corruption or with other applicable regulatory
requirements may result in administrative, civil or criminal penalties. These penalties could include delays or refusal to
authorize the conduct of clinical trials or to grant MA, product withdrawals and recalls, product seizures, suspension,
withdrawal or variation of the MA, total or partial suspension of production, distribution, manufacturing or clinical trials,
operating restrictions, injunctions, suspension of licenses, fines and criminal penalties.

The aforementioned EU rules are generally applicable in the European Economic Area, or EEA, which consists of

the 27 EU member states plus Iceland, Liechtenstein and Norway.

Pricing and Reimbursement

Even if a medicinal product obtains a MA in the EU, there can be no assurance that reimbursement for such 

product will be secured on a timely basis or at all.  Governments influence the price of medicinal products through their 
pricing and reimbursement rules and control of national healthcare systems that fund a large part of the cost of those 
products to consumers.  Member states are free to restrict the range of pharmaceutical products for which their national 
health insurance systems provide reimbursement, and to control the prices and reimbursement levels of pharmaceutical 
products for human use. Some jurisdictions operate positive and negative list systems under which products may only be 
marketed once a reimbursement price has been agreed to by the government.  Member states may approve a specific price 
or level of reimbursement for the pharmaceutical product, or alternatively adopt a system of direct or indirect controls on 
the profitability of the company responsible for placing the pharmaceutical product on the market, including volume-based 
arrangements, caps and reference pricing mechanisms.  To obtain reimbursement or pricing approval, some of these 
countries may require the completion of clinical trials that compare the cost-effectiveness of a particular product candidate 
to currently available therapies.  Other EU member states allow companies to fix their own prices for medicines, but 
monitor and control company profits.  The downward pressure on healthcare costs in general, particularly prescription 
medicines, has become very intense.  As a result, increasingly high barriers are being erected to the entry of 

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new products. In addition, in some countries, cross border imports from low-priced markets exert a commercial pressure on 
pricing within a country.

Rules Applicable in the United Kingdom

The UK formally left the EU on January 31, 2020, commonly referred to as “Brexit”. The post-Brexit transition
period, during which EU pharmaceutical laws continued to apply to the UK, expired on December 31, 2020. This means
that since January 1, 2021, the UK operates under a distinct regulatory regime. EU pharmaceutical laws now only apply to
the UK in respect of Northern Ireland (as laid out in the Protocol on Ireland and Northern Ireland, including but not limited
to MAAs).

Since January 1, 2021, EU laws which have been transposed into UK law through secondary legislation continue
to be applicable as “retained EU law”. As there is no general power to amend this “retained EU law”, the UK government
has introduced a new Medicines and Medical Devices Bill which seeks to address regulatory gaps through implementing
regulations and delegated powers covering, among other things, the fields of human medicines and clinical trials of human
medicines. The purpose of the bill is to enable the existing UK regulatory frameworks to be updated. Although regulatory
authorities in the UK have indicated in the bill that new UK rules will closely align with EU laws, detailed proposals are
yet to be published. The bill has not been formally enacted and had its final reading in the House of Lords on January 21,
2021. As the House of Lords proposed amendments to the draft legislation, the bill will go back to the other house of
parliament for debate. There is no set time period for consideration of amendments and the bill will only proceed to be
enacted as law once the draft bill has been agreed by both houses and royal assent has been obtained. The draft bill
currently contemplates that the provisions will come into effect immediately upon enactment or otherwise within two
months thereafter, with the exception of certain provisions on enforcement and disclosure, which are subject to further
regulation. Significant political and economic uncertainty therefore remains about how much the relationship between the
UK and EU will differ as a result of the UK’s withdrawal.

On December 24, 2020 the EU and UK agreed to the EU-UK Trade and Cooperation Agreement, or TCA, which

has been provisionally applicable since January 1, 2021. The TCA was ratified by the UK Parliament on December 30,
2020 and awaits final agreement of the EU member states. The TCA includes certain provisions affecting pharmaceutical
companies such as customs and tariffs in relation to healthcare products and provides for the mutual recognition of Good
Manufacturing Practice, or GMP, inspections of manufacturing facilities for medicinal products and GMP documents
issued. It is important to note that significant regulatory gaps still exist and the TCA does not contain wholesale mutual
recognition of UK and EU pharmaceutical regulations and product standards between the parties, for example, in relation
to batch testing and pharmacovigilance which remain subject to further bilateral discussions.

UK Clinical Trials

The UK regulatory framework in relation to clinical trials is derived from existing EU legislation (as implemented

into UK law, through secondary legislation), and after Brexit, EU laws on clinical trials (including the impending EU
Clinical Trials Regulation, EU CTR) are no longer directly applicable in Great Britain (i.e., the UK excluding Northern
Ireland). There is a risk that the MHRA may diverge from the EU to maintain regulatory flexibility and changes impacting
the ability to conduct trials spanning several EU countries will need to be closely monitored going forward. Already, as a
result of Brexit various benefits of membership no longer apply to the UK such that, for example, UK sponsored trials that
span several EU countries now need to have an individual or organization in the EU to act as a legal representative, or
sponsor and it is unclear whether the UK will have access to new EU clinical trial databases such as the Clinical Trial
Information System going forward (the centralized EU Portal for clinical trial information storage). Additionally, new rules
apply to the import of investigational medicinal products from the EU and EEA to Great Britain.

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UK Marketing Authorizations

The MHRA is now the UK’s standalone regulator for MAAs. All existing centralized procedure MAs were

automatically converted into UK MAs effective in Great Britain and issued with a UK MA number on January 1, 2021
(unless marketing authorization holders, or MAHs, opted out of this scheme by January 21, 2021). As a result of the
implementation of the Protocol on Ireland and Northern Ireland, centralized procedure MAs remain valid for marketing
products in Northern Ireland. Pending applications which were submitted to EMA prior to the end of the transition period
will either be determined in parallel by the MHRA, or will be put “on hold” until the CHMP issues a positive decision
which can be relied upon by MHRA. Converted EU MAs will be treated as if they were granted on the date the
corresponding centralized procedure MA was granted and the renewal date will stay the same. If renewals were submitted
and no decision was rendered before January 1, 2021, the MHRA will ensure the renewal process is concluded and
processed appropriately, and there will be no need to resubmit the application. From January 1, 2021 the requirements for
renewal submissions remain the same as required by the EMA and the MAH should continue to submit renewal
applications to the MHRA nine months before they expire (or six months in relation to conditional MAs).

Following January 1, 2021, an applicant for a centralized procedure MA must be established in the EU. After this
date, companies established in the UK cannot use the centralized procedure and instead must follow one of the UK national
authorization procedures or one of the remaining post-Brexit international cooperation procedures (such as the Access
Consortium) to obtain a MA to market products in the UK. In addition, for a two-year period from January 1, 2021, MHRA
may rely on a decision taken by the European Commission on the approval of a new centralized procedure MA when
determining an application for a Great Britain MA; or use the MHRA’s decentralized or mutual recognition procedures
which enable MAs approved in EU member states (or Iceland, Liechtenstein, Norway) to be granted in Great Britain.
Additionally, the ‘Unfettered Access Procedure’ enables an MAH in Northern Ireland to seek recognition in Great Britain.
Post Brexit, the MHRA has been updating various aspects of the regulatory regime for medicines in the UK, including:
introducing the Innovative Licensing and Access Procedure to accelerate the time to market and facilitate patient access for
innovative medicines; updates to the UK national approval procedure, introducing a 150-day objective for assessing
applications for MAs in the UK, Great Britain and Northern Ireland and a rolling review process for MA applications
(rather than a consolidated full dossier submission).

UK Orphan Designation

The UK regulatory framework in relation to orphan drug designation is derived from existing EU legislation (as

implemented into UK law, through secondary legislation). The European Commission is currently evaluating new
legislation in relation to orphan medicines, and after Brexit, these laws will no longer be directly applicable in Great
Britain. Since January 1, 2021, there has been no route to obtain pre-MA orphan designation in Great Britain, however, as a
result of the implementation of the Protocol on Ireland and Northern Ireland, EU orphan drug designation and time periods
of market exclusivity still remain valid for marketing products in Northern Ireland. Instead, the MHRA now reviews
applications for Great Britain orphan designation in parallel with the corresponding MA application. The criteria are
essentially the same as under the EU regime, but have been tailored for the Great Britain market, i.e. the prevalence of the
condition in Great Britain (rather than the EU) must not be more than 5 in 10,000. For medicinal products that have
received orphan status on or after January 1, 2021, a period of 10 years orphan market exclusivity is awarded from the date
of MA by the MHRA. An additional two years of exclusivity may be added where pediatric data requirements have been
met. Products with an orphan designation in the EU may be considered for a Great Britain orphan marketing authorization.
However, where centrally authorized MAs have an existing EU orphan designation, these have been converted into Great
Britain MAs and shall continue in effect with the remaining period of orphan market exclusivity.

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UK Specials Regulation

The UK’s Human Medicines Regulations 2012 allow for the manufacture and supply of medicinal products not 

authorized for marketing to patients with special needs at the request of the healthcare professional responsible for the 
patient’s care (these products are referred to as “specials”).  A special may only be supplied: (i) in response to an 
unsolicited order from a healthcare professional responsible for the care of the patient, (ii) if the product is manufactured 
and assembled in accordance with the specifications of that healthcare professional to fulfil the special needs of the 
individual patient which cannot be met by products already authorized for marketing, and (iii) if the product is 
manufactured under a specials license granted by the UK’s MHRA.

Manufacturing a special also imposes a five year record retention requirement subject to review by the MHRA,

including details of any suspected adverse reaction to the product so sold or supplied of which the person is aware or
subsequently becomes aware, as well as a continuing obligation to notify the MHRA of any suspected adverse reaction to
the medicinal product which is a serious adverse reaction.

Privacy and Data Protection Laws

We are also subject to laws and regulations in non-U.S. countries in which we are established or in which we run 

clinical trials, as well as any countries where we may sell, market and distribute any products for which we obtain 
marketing approval. These laws and regulations cover data privacy and the protection of health-related and other personal 
information.  EU member states and other jurisdictions have adopted data protection laws and regulations, which impose 
significant compliance obligations.  Laws and regulations in these jurisdictions apply broadly to the collection, use, 
storage, disclosure, processing and security of personal information that identifies or may be used to identify an individual, 
such as names, contact information, and sensitive personal data such as health data.  These laws and regulations are subject 
to frequent revisions and differing interpretations, and have generally become more stringent over time.

The Regulation (EU) 2016/679 (General Data Protection Regulation, or GDPR) is a European framework law 

which imposes many requirements for controllers and processors of personal data, including, for example, higher standards 
for obtaining consent from individuals, if this is required, to process their personal data, more robust disclosures to 
individuals and a strengthened individual data rights regime, shortened timelines for data breach notifications, limitations 
on retention and secondary use of personal data, increased requirements pertaining to health data and pseudonymized (i.e., 
key-coded) data and additional obligations when we contract third-party processors in connection with the processing of 
personal data.  The GDPR allows EU member states to make additional laws and regulations further regulating the 
processing of genetic, biometric or health data.  Failure to comply with the requirements of GDPR and the applicable 
national data protection laws of the EU member states may result in fines of up to €20,000,000 or up to 4% of the total 
worldwide annual turnover of the preceding financial year, whichever is higher, and other administrative penalties and may 
expose us to compensation claims from affected individuals.

From January 1, 2021, we are subject to the GDPR and also the UK GDPR, which, together with the amended UK

Data Protection Act 2018, retains the GDPR in UK national law. The UK GDPR mirrors the fines under the GDPR, e.g.
fines up to the greater of €20 million (£17.5 million) or 4% of the total worldwide annual turnover of the preceding
financial year. The relationship between the UK and the EU in relation to certain aspects of data protection law remains
unclear, and it is unclear how UK data protection laws and regulations will develop in the medium to longer term, and how
data transfers to and from the UK will be regulated in the long term. These changes may lead to additional costs and
increase our overall risk exposure. Currently there is a four to six-month grace period agreed in the TCA, ending June 30,
2021 at the latest, while the parties discuss an adequacy decision. The European Commission published a draft adequacy
decision on February 19, 2021. If adopted, the decision will enable data transfers from EU member states to the UK for a
four-year period, subject to subsequent extensions.

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Recent legal developments in Europe have created complexity and uncertainty regarding transfers of personal data
from the EU and the UK to the United States. Most recently, on July 16, 2020, the Court of Justice of the European Union,
or CJEU, invalidated the EU-US Privacy Shield Framework, or Privacy Shield, under which personal data could be
transferred from the EU to US entities who had self-certified under the Privacy Shield scheme. While the CJEU upheld the
adequacy of the standard contractual clauses (a standard form of contract approved by the European Commission as an
adequate personal data transfer mechanism, and potential alternative to the Privacy Shield), it made clear that reliance on
them alone may not necessarily be sufficient in all circumstances. Use of the standard contractual clauses must now be
assessed on a case-by-case basis taking into account the legal regime applicable in the destination country, in particular
applicable surveillance laws and rights of individuals and additional measures and/or contractual provisions may need to be
put in place, however, the nature of these additional measures is currently uncertain. The CJEU went on to state that if a
competent supervisory authority believes that the standard contractual clauses cannot be complied with in the destination
country and the required level of protection cannot be secured by other means, such supervisory authority is under an
obligation to suspend or prohibit that transfer.

These recent developments may require us to review and amend the legal mechanisms by which we make and/or 

receive personal data transfers to or from the U.S.  As supervisory authorities issue further guidance on personal data 
export mechanisms, including circumstances where the standard contractual clauses cannot be used, and/or start taking 
enforcement action, we could suffer additional costs, complaints and/or regulatory investigations or fines, and/or if we are 
otherwise unable to transfer personal data between and among countries and regions in which we operate, it could affect 
the manner in which we provide our services, the geographical location or segregation of our relevant systems and 
operations, and could adversely affect our financial results.

Employees

As of December 31, 2020, we had 219 employees, all of which are full-time employees. None of our employees is 

subject to a collective bargaining agreement or represented by a trade or labor union.  We consider our relationship with 
our employees to be good. 

Our human capital resources objectives include, as applicable, identifying, recruiting, retaining, incentivizing and
integrating our existing and new employees, advisors and consultants. The principal purposes of our equity incentive plans
are to attract, retain and reward personnel through the granting of equity-based compensation awards in order to increase
shareholder value and the success of our company by motivating such individuals to perform to the best of their abilities
and achieve our objectives.

Corporate Information

MeiraGTx Holdings plc was formed on May 1, 2018 under the laws of the Cayman Islands. Our predecessor, 

MeiraGTx Limited, a limited company under the laws of England and Wales, was formed on March 20, 2015.  In 
connection with our initial public offering (“IPO”), we reorganized whereby MeiraGTx Limited became a wholly owned 
subsidiary of MeiraGTx Holdings plc.

Available Information

Our website can be found at http://www.meiragtx.com. From time to time, we may use our website as a channel of

distribution of material company information. Financial and other material information is routinely posted and accessible
under the Investors and Media section of our website at http://www.meiragtx.com.

We file annual, quarterly and current reports, proxy statements and other information with the U.S. Securities and

Exchange Commission (“SEC”). Our SEC filings are available to the public over the Internet at the SEC’s website at
http://www.sec.gov. Our SEC filings are also available without charge under the Investors and Media section of our website
at http://www.meiragtx.com. We make this information available on our website as soon as reasonably

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practicable after we electronically file such information with, or furnish it to, the SEC. Our website and the information
contained on or connected to that site are not incorporated into this Form 10-K.

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ITEM 1A.

RISK FACTORS

Investing  in  our  common  stock  involves  a  high  degree  of  risk.  You  should  consider  carefully  the  risks  described  below,
together with the other information included or incorporated by reference in this Form 10-K. If any of the following risks
occur,  our  business,  financial  condition,  results  of  operations  and  future  growth  prospects  could  be  materially  and
adversely affected. In these circumstances, the market price of our common stock could decline. Other events that we do
not currently anticipate or that we currently deem immaterial may also affect our business, prospects, financial condition
and  results  of  operations,  particularly  in  light  of  the  fast-changing  nature  of  the  COVID-19  pandemic,  containment
measures, vaccine distribution and the related impacts to economic and operating conditions.

Risks Related to Our Financial Position and Need for Additional Capital

We have incurred significant losses since inception and anticipate that we will incur continued losses for the foreseeable
future, and may never achieve or maintain profitability.

We are a clinical stage company with limited operating history. We were formed and began operations in 2015.

We have never been profitable and do not expect to be profitable in the foreseeable future. We have incurred net losses
since inception, including net losses of approximately $58.0 million and $54.8 million for the years ended December 31,
2020 and December 31, 2019, respectively. As of December 31, 2020, we had an accumulated deficit of approximately
$261.0 million. Since our inception, we have devoted substantially all of our resources to developing our technology
platform, establishing our viral vector manufacturing facilities and developing manufacturing processes, advancing the
product candidates in our ophthalmology, salivary gland and neurodegenerative disease programs, building our intellectual
property portfolio, organizing and staffing our company, developing our business plans, raising capital, and providing
general and administrative support for these operations. We have not yet demonstrated an ability to successfully complete
large-scale, pivotal clinical trials, obtain marketing approval, manufacture product at a commercial scale, or arrange for a
third party to do so on our behalf, or conduct sales and marketing activities necessary for successful product
commercialization. Given the length of time typically needed to develop a new drug from the time it enters Phase 1 clinical
trials to when it is approved for treating patients, predictions about our future success or viability may not be as accurate as
they could be if we had a longer operating history or a history of successfully developing and commercializing genetic
medicine products.

We expect to continue to incur significant expenses and additional operating losses for the foreseeable future as
we seek to advance product candidates through preclinical and clinical development, expand our research, development
and manufacturing activities, develop new product candidates, build and expand our intellectual product portfolio,
complete clinical trials, seek regulatory approval and, if we receive regulatory approval, commercialize our products.
Furthermore, the costs of advancing product candidates into each succeeding clinical phase tend to increase substantially
over time, including the planned advancement of AAV-RPGR into the Phase 3 Lumeos clinical trial for the treatment of
patients with XLRP and the initiation of a Phase 3 clinical trial of AAV-RPE65 for the treatment of retinal dystrophy
associated with mutations in the RPE65 gene, although we believe that certain of these increases will be partially offset by
the research funding in connection with the Collaboration Agreement. The total costs to advance any of our product
candidates to marketing approval in even a single jurisdiction would be substantial. Because of the numerous risks and
uncertainties associated with gene therapy product development, we are unable to accurately predict the timing or amount
of increased expenses or when, or if, we will be able to begin generating revenue from the commercialization of products
or achieve or maintain profitability. Our expenses have and will continue to increase substantially as a public company and
as we continue to add clinical, scientific, operational, financial, manufacturing, compliance and management information
systems and personnel, including personnel to support our product development, manufacturing and planned future
commercialization efforts.

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Before we generate any revenue from product sales, each of our programs and product candidates will require

additional preclinical and/or clinical development, potential regulatory approval in multiple jurisdictions, manufacturing,
building of a commercial organization, substantial investment and significant marketing efforts. Our expenses could
increase beyond expectations if we are required by the U.S. Food and Drug Administration (the “FDA”), UK Medicines
and Healthcare Regulatory Agency (“MHRA”), European Medicines Agency (the “EMA”), or other regulatory authorities
to perform preclinical studies and clinical trials in addition to those that we currently anticipate. These risks are further
described under “—Risks Related to Discovery, Development, Clinical Testing, Manufacturing and Regulatory Approval”
and “—Risks Related to Commercialization.” As a result, we expect to continue to incur net losses for the foreseeable
future. These net losses have had, and will continue to have, an adverse effect on our shareholders’ equity and working
capital.

As we continue to build our business, we expect our financial condition and operating results may fluctuate

significantly from quarter to quarter and year to year due to a variety of factors, many of which are beyond our control.
Accordingly, you should not rely upon the results of any particular quarterly or annual period as indications of future
operating performance. If we are unable to develop and commercialize one or more of our product candidates either alone
or with collaborators, or if revenues from any product candidate that receives marketing approval are insufficient, we will
not achieve profitability. Even if we do achieve profitability, we may not be able to sustain or increase profitability. If we
are unable to achieve and then maintain profitability, the value of our equity securities will be adversely affected.

We will require additional capital to fund our operations, which may not be available on acceptable terms, if at all.

We expect to spend substantial amounts to complete the development of, seek regulatory approvals for and
commercialize our product candidates, as well as continue to expand our manufacturing and supply chain capabilities. This
will require additional capital, which we may raise through equity offerings, debt financings, marketing and distribution
arrangements and other collaborations, strategic alliances and licensing arrangements or other sources. Our ability to raise
additional capital when needed may be adversely affected by external factors beyond our control, including changes in the
political climate, changes in market interest rates, potential reforms and changes to government negotiation and regulation,
the effect of healthcare reform legislation, including those that may limit pricing of pharmaceutical products and drugs,
market prices and conditions, prospects for favorable or unfavorable clinical trial results, new product initiatives, the
manufacturing and distribution of new products, product safety and efficacy issues, new collaborations, strategic alliances
and licensing arrangements, and the COVID-19 outbreak and mitigation measures. Furthermore, we expect to continue to
incur costs associated with operating as a public company. Adequate additional financing may not be available to us on
acceptable terms, or at all. Our failure to raise capital as and when needed would have a negative effect on our financial
condition and our ability to pursue our business strategy. In addition, attempting to secure additional financing may divert
the time and attention of our management from day-to-day activities and harm our product candidate development efforts.
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, 2020, our cash

and cash equivalents were $209.5 million. In addition, we expect to receive $38 million in receivables in the first quarter of 
2021 from Janssen in connection with the Collaboration Agreement.  Based on our cash and cash equivalents at December 
31, 2020 and the research funding and milestone payments we expect to receive under the Collaboration Agreement, we 
estimate that such funds will be sufficient to enable us to fund our operating expenses and capital expenditure requirements 
into the middle of 2023. This estimate is based on assumptions that may prove to be wrong, and we could use our available 
capital resources sooner than we currently expect. Changing circumstances could cause us to spend more than expected or 
consume capital significantly faster than we currently anticipate. Because the length of time and activities associated with 
successful development of our product candidates is uncertain, we are unable to estimate the actual funds we will require 
for development and any approved marketing and commercialization activities. Our future funding requirements, both near 
and long-term, will depend on many factors, including, but not limited to:

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● the progress, timing, costs and results of our ongoing clinical development for our X-linked retinitis

pigmentosa product candidate, AAV-RPGR, including the planned advancement of AAV-RPGR into the
Phase 3 Lumeos clinical trial for the treatment of patients with XLRP, for our CNGB3 achromatopsia gene
therapy product candidate, AAV-CNGB3, for our CNGA3 achromatopsia gene therapy product candidate,
AAV-CNGA3, for our RPE65-associated retinal dystrophy product candidate, AAV-RPE65, including the
initiation of a Phase 3 clinical trial of AAV-RPE65 for the treatment of retinal dystrophy associated with
mutations in the RPE65 gene, for our radiation induced xerostomia product candidate, AAV-AQP1, and to
continue to conduct our ongoing natural history studies for inherited retinal diseases, or IRDs;

● the progress, timing, costs and results of our clinical development program for our product candidate for the

treatment of Parkinson’s disease, AAV-GAD;

● the development of our product candidate for the treatment of ALS, AAV-UPF1, for our product candidate
for the treatment of xerostomia associated with Sjogren’s syndrome, AAV-AQP1 and our product candidate
for the treatment of neovascular age related macular degeneration, or wet AMD;

● continuing our current research programs, our preclinical development of product candidates from our

current research programs and further developing our gene regulation technology;

● seeking to identify, assess, acquire and/or develop additional research programs and additional product

candidates;

● the preclinical testing and clinical trials for any product candidates we identify and develop;

● establishing a sales, marketing and distribution infrastructure to commercialize any product candidates for

which we may obtain marketing approval;

● the outcome, timing and cost of meeting regulatory requirements established by the FDA, MHRA, EMA and

other regulatory authorities;

● the cost of expanding and protecting our intellectual property portfolio, including filing, prosecuting,

defending and enforcing our patent claims and other intellectual property rights;

● the cost of defending potential intellectual property disputes, including patent infringement actions brought

by third parties against us or any of our product candidates;

● the effect of competing technological and market developments;

● the cost of further developing and scaling our manufacturing facility and processes;

● the cost and timing of completion of commercial-scale manufacturing facilities and activities;

● the cost of making royalty, milestone or other payments under current and any future in-license agreements;

● our ability to establish and maintain strategic collaborations, licensing or other agreements and the financial

terms of such agreements;

● the extent to which we in-license or acquire rights to other products, product candidates and technologies;

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● the cost of establishing sales, marketing and distribution capabilities for our product candidates in regions

where we choose to commercialize our products; and

● the initiation, progress, timing and results of our commercialization of our product candidates, if approved

for commercial sale.

Raising additional capital through the sale of equity or convertible debt securities will dilute your ownership

interest, and the terms of these securities may include liquidation or other preferences that adversely affect your rights as a
common shareholder. Debt financing and preferred equity financing, if available, may involve agreements that include
covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital
expenditures or declaring dividends. If we raise additional funds through collaborations, strategic alliances or marketing,
distribution or licensing arrangements with third parties, we may be required to relinquish valuable rights to our
technologies, future revenue streams or product candidates or grant licenses on terms that may not be favorable to us. If we
are unable to raise additional funds through equity or debt financings when needed, we may be required to delay, limit,
reduce or terminate our product development or future commercialization efforts or grant rights to develop and market
product candidates that we would otherwise prefer to develop and market ourselves.

We are heavily dependent on the success of our Most Advanced Product Candidates, which are still in development, and
if none of them receive regulatory approval or are successfully commercialized, our business may be harmed.

Our future success and ability to generate product revenue is substantially dependent on our ability to successfully

develop, obtain regulatory approval for and successfully commercialize our product candidates. We currently have no
products that are approved for commercial sale and may never be able to develop marketable products. We have invested
and expect to continue to invest a meaningful portion of our efforts and expenditures over the next few years in the
development of AAV-RPGR, AAV-GAD, AAV-CNGB3, AAV-CNGA3, AAV-RPE65 and AAV-AQP1 (the “Most
Advanced Product Candidates”), which will require additional clinical development, management of clinical and
manufacturing activities, regulatory approval in multiple jurisdictions, manufacturing sufficient supply, building of a
commercial organization, substantial investment and significant marketing efforts before we can generate any revenues
from any commercial sales. While we have entered into a Collaboration Agreement with Janssen with respect to AAV-
CNGB3, AAV-CNGA3 and AAV-RPGR, pursuant to which we received a $100 million upfront payment and will also
receive funding for certain research, manufacturing, clinical development and commercialization costs, potential additional
milestone payments upon the achievement of such milestones and royalties on future net sales of products, there can be no
assurance that these three product candidates will be successfully developed and commercialized by us and Janssen. We
cannot be certain that our Most Advanced Product Candidates will be successful in clinical trials, receive regulatory
approval or be successfully commercialized even if we receive regulatory approval. Even if we receive approval to market
our Most Advanced Product Candidates from the FDA, MHRA, EMA or other regulatory bodies, we cannot be certain that
our product candidates will be successfully commercialized by us or our collaborators, widely accepted in the marketplace
or more effective than other commercially available alternatives. Additionally, the research, testing, manufacturing,
labeling, approval, sale, marketing and distribution of gene therapy products are and will remain subject to extensive and
evolving regulation by the FDA, MHRA, EMA and other regulatory authorities. We are not permitted to market our Most
Advanced Product Candidates in the United States until they receive approval of a biologics license application, or BLA,
from the FDA, we cannot market them in the UK or EU until we receive approval for a Marketing Authorization
Application, or MAA, from the MHRA or EMA, respectively, and we cannot market them in other countries until we
receive any other required regulatory approval in those countries.

Because some of our other product candidates are based on similar technology as our Most Advanced Product
Candidates, if any of our product candidates show unexpected adverse events or a lack of efficacy in the indications we
intend to treat, or if we experience other regulatory or developmental issues, our development plans and business could be
significantly harmed. Further, competitors may be developing products with similar technology and may experience
problems with their products that could identify problems that would potentially harm our business.

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We may not be successful in our efforts to identify additional product candidates.

Part of our strategy involves identifying novel product candidates. The process by which we identify product

candidates may fail to yield product candidates for clinical development for a number of reasons, including those discussed
in these risk factors and also:

● we may not be able to assemble sufficient resources to acquire or discover additional product candidates;

● competitors may develop alternatives that render our potential product candidates obsolete or less attractive;

● potential product candidates we develop may nevertheless be covered by third parties’ patents or other

exclusive rights;

● potential product candidates may, on further study, be shown to have harmful side effects, toxicities or other
characteristics that indicate that they are unlikely to be products that will receive marketing approval and
achieve market acceptance;

● potential product candidates may not be effective in treating their targeted diseases;

● the market for a potential product candidate may change so that the continued development of that product

candidate is no longer reasonable;

● a potential product candidate may not be capable of being produced in commercial quantities at an acceptable

cost, or at all; or

● the regulatory pathway for a potential product candidate may be too complex and difficult to navigate

successfully or economically.

In addition, we may choose to focus our efforts and resources on a potential product candidate that ultimately

proves to be unsuccessful. As a result, we may fail to capitalize on viable commercial products or profitable market
opportunities, be required to forego or delay pursuit of opportunities with other product candidates or other diseases that
may later prove to have greater commercial potential, or relinquish valuable rights to such product candidates through
collaboration, licensing or other royalty arrangements in cases in which it would have been advantageous for us to retain
sole development and commercialization rights. If we are unable to identify additional suitable product candidates for
clinical development, this would adversely impact our business strategy and our financial position and share price and
could potentially cause us to cease operations.

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Risks Related to Discovery, Development, Clinical Testing, Manufacturing and Regulatory Approval

The outbreak of the novel coronavirus disease, COVID-19, or other pandemic, epidemic or outbreak of an infectious
disease may materially and adversely impact our business, including our preclinical studies and clinical trials.

The COVID-19 pandemic and government measures taken in response have had a significant impact, both direct
and indirect, on businesses and commerce globally, as worker shortages have occurred; supply chains have been disrupted;
facilities and production have been suspended; and demand for certain goods and services, such as medical services and
supplies, has spiked, while demand for other goods and services, such as travel, has fallen.

As a result of the COVID-19 pandemic, we have at times restricted onsite activities, and may continue to restrict 
onsite activities, to manufacturing functions, laboratory research and certain support activities.  We have also experienced 
some delays in enrolling, treating and monitoring patients in our clinical trials, as well as limited supply chain disruptions.  
We may experience other disruptions from the COVID-19 pandemic or other pandemic, epidemic or outbreak of an 
infectious disease that could severely impact our business, preclinical studies, clinical trials and laboratory and 
manufacturing activities, including:

● delays or difficulties in enrolling patients in our clinical trials;

● delays or difficulties in clinical site initiation, including difficulties in recruiting clinical site investigators and

clinical site staff;

● diversion of healthcare resources away from the conduct of clinical trials, including the diversion of hospitals

serving as our clinical trial sites and hospital staff supporting the conduct of our clinical trials;

● interruption of key clinical trial activities, such as clinical trial site data monitoring, due to limitations on
travel imposed or recommended by federal, state, local or foreign governments, employers and others, or
interruption of clinical trial subject visits and study procedures, which may impact the integrity of subject
data and clinical study endpoints;

● interruption or delays in the operations of the FDA, MHRA, EMA or other regulatory authorities, which may

impact review and approval timelines;

● interruption of, or delays in, the manufacturing of our product candidates due to staffing shortages,

governmental restrictions relating to on-site activities, production slowdowns or stoppages and supply chain
disruptions;

● slowdowns or problems with the development and startup of our new manufacturing facilities in Shannon,

Ireland;

● interruptions in preclinical studies due to restricted or limited operations at our laboratory facilities;

● limitations on employee resources that would otherwise be focused on the conduct of our preclinical studies
and clinical trials, including because of sickness of employees or their families or the desire of employees to
avoid contact with large groups of people; and

● interruption or delays to our sourced discovery and clinical activities.

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The COVID-19 pandemic continues to impact businesses globally and new and more contagious variations of the 

virus have emerged. The extent to which the outbreak may further impact our business, preclinical studies, clinical trials 
and laboratory and manufacturing activities will depend on future developments, which are highly uncertain and cannot be 
predicted with confidence, such as the duration of the pandemic, the timing, distribution and effectiveness of vaccines, 
travel restrictions and social distancing in the countries where we do business, business closures or business disruptions, 
and the effectiveness of actions taken in the countries where we do business to contain and treat the disease, respond to the 
reduction in global economic activity and resume normal economic and operating conditions.  If we or any of the third 
parties with whom we engage experience prolonged shutdowns or other business disruptions, our ability to conduct our 
business in the manner and on the timelines presently planned could be materially and negatively impacted. The pandemic 
and public and private responses to the pandemic may continue to affect economic conditions and may lead to an economic 
downturn and/or a recession, at a global scale, which could materially affect our performance, financial condition, results 
of operations, and cash flows, as well as our ability to raise additional capital.

In addition, we expect the COVID-19 pandemic will continue to affect our employees, our vendors and their 

employees or the employees of companies with which we do business, which may ultimately disrupt our business 
operations. We have and will continue to adhere to applicable guidelines and safety measures including work-from-home 
policies and restricting onsite activities to manufacturing functions, laboratory research and certain support activities as 
necessary.  Employees who are working in our offices are required to quarantine if they are diagnosed with, show 
symptoms of, or are exposed to someone with, the coronavirus.  We may also have to reinstitute a broader work-from-
home policy for an undetermined amount of time if COVID-19 cases increase in the jurisdictions where we have offices. 
An extended period of remote working, whether by our employees, our vendors and their employees or the employees of 
companies with which we do business may negatively impact productivity, or disrupt, delay, or otherwise adversely impact 
our business. In addition, this could increase our cyber security risk due to increases in malware campaigns and phishing 
attacks preying on the uncertainties surrounding COVID-19, create data accessibility concerns, and make us more 
susceptible to communication disruptions, any of which could adversely impact our business operations or delay necessary 
interactions with regulators, laboratory and manufacturing sites, research or clinical trial sites and other important agencies 
and contractors.

We intend to identify and develop product candidates based on our novel gene therapy platform, which makes it difficult
to  predict  the  time  and  cost  of  product  candidate  development.  Very  few  gene  therapies  have  been  approved  in  the
United States or in Europe.

We have concentrated a portion of our research and development efforts on our gene therapy platform, which uses

both transduction and gene control technology. Our future success depends on the successful development of these novel
therapeutic approaches. To date, very few products that utilize gene transfer have been approved in the United States or
Europe.

Our gene therapy platform is based on a suite of viral vectors which we can deploy with gene therapy constructs,

which relies on the ability of AAV to efficiently transmit a therapeutic gene to certain kinds of cells. The mechanism of
action by which these vectors target particular tissues is still not completely understood. Therefore, it is difficult for us to
determine that our vectors will be able to properly deliver gene transfer constructs to enough tissue cells to reach
therapeutic levels. We cannot be certain that animal models will exist for some of the diseases we expect to pursue, that our
viral vectors will be able to meet safety and efficacy levels needed to be therapeutic in humans or that they will not cause
significant adverse events or toxicities. Furthermore, prior work conducted by a third party in non-human primates suggests
that intravenous, or IV, delivery of certain AAV vectors at very high doses may result in severe toxicity. The indications
that we target do not use IV administration for viral vector delivery and do not use doses as high as those tested in these
publications, and to date we have not observed the severe toxicities described in these publications with the naturally
occurring AAV vectors that we use. However, we cannot be certain that we will be able to avoid triggering toxicities in our
future preclinical studies or clinical trials. Any such results could impact our ability to develop a product candidate. As a
result of these factors, it is more difficult for us to predict the time and cost of product candidate development, and we
cannot predict whether the application of our gene therapy platform, or any

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similar or competitive gene therapy platforms, will result in the identification, development, and regulatory approval of any
product candidates, or that other gene therapy technologies will not be considered better or more attractive. There can be
no assurance that any development problems we experience in the future related to our gene therapy platform or any of our
research programs will not cause significant delays or unanticipated costs, or that such development problems can be
solved. Any of these factors may prevent us from completing our preclinical studies or clinical trials or commercializing
any product candidates we may develop on a timely or profitable basis, if at all.

In addition, because our gene regulation technology is still in the research stage, we have not yet been able to

assess safety in humans, and there may be long-term effects from treatment that we cannot predict at this time.

Because  gene  therapy  is  novel  and  the  regulatory  landscape  that  governs  any  product  candidates  we  may  develop  is
uncertain and may change, we cannot predict the time and cost of obtaining regulatory approval, if we receive it at all,
for any product candidates we may develop.

The regulatory requirements that will govern any novel gene therapy product candidates we develop are not

entirely clear and may change. Within the broader genetic medicine field, very few therapeutic products have received
marketing authorization from the FDA, MHRA and EMA. Even with respect to more established products that fit into the
categories of gene therapies or cell therapies, the regulatory landscape is still developing. Regulatory requirements
governing gene therapy products and cell therapy products have changed frequently and will likely continue to change in
the future. Moreover, there is substantial, and sometimes uncoordinated, overlap in those responsible for regulation of
existing gene therapy products and cell therapy products, which could impact the timing and cost of any regulatory
approval. For example, in the United States, the FDA has established the Office of Tissues and Advanced Therapies within
its Center for Biologics Evaluation and Research, or CBER, to consolidate the review of gene therapy and related products,
and the Cellular, Tissue and Gene Therapies Advisory Committee to advise CBER on its review. Gene therapy clinical
trials are also subject to review and oversight by an institutional biosafety committee, or IBC, and/or an institutional review
board, or IRB, which are local institutional committees or boards, as applicable, that review, approve and oversee basic and
clinical research conducted at the institution participating in the clinical trial.

In Europe, the EMA’s Committee for Advanced Therapies, or CAT, is responsible for assessing the quality, safety,

and efficacy of ATMPs. ATMPs include gene therapy medicines, somatic-cell therapy medicines and tissue-engineered
medicines. The role of the CAT is to prepare a draft opinion on an application for marketing authorization for a gene
therapy medicinal candidate that is submitted to the EMA. In the EU, the development and evaluation of a gene therapy
product must be considered in the context of the relevant EU guidelines. The EMA may issue new guidelines concerning
the development and marketing authorization for gene therapy products and require that we comply with these new
guidelines. As a result, the procedures and standards applied to gene therapy products and cell therapy products may be
applied to any gene therapy product candidate we may develop, but that remains uncertain at this point.

Post Brexit, MAAs for ATMPs in Great Britain are regulated nationally and assessed in accordance with the

general provisions in place for the licensing of medicines, taking the specific requirements for this group of medicines into
account. In Northern Ireland, ATMPs will continue to be authorized according to the EMA’s centralized marketing
authorization procedure. Definitions for individual classes of ATMPs remain unchanged and classification of ATMPs are
undertaken by the MHRA in accordance with EU legislation and current guidance from CAT. Data, traceability,
exemptions from licensing, packaging and post-authorization requirements remain in line with EU requirements transposed
into UK law. However, if the EMA issues new guidance on ATMPs going forward, there is a risk of regulatory divergence
with the MHRA and separate procedures and standards with which we may need to comply.

Adverse developments in preclinical studies or clinical trials conducted by others in the field of gene therapy and

gene regulation products may cause the FDA, MHRA, EMA, and other regulatory bodies to revise the requirements for
approval of any product candidates we may develop or limit the use of products utilizing gene regulation technologies,
either of which could harm our business. In addition, the clinical trial requirements of the FDA, MHRA, EMA, and other
regulatory authorities and the criteria these regulators use to determine the safety and efficacy of a

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product candidate vary substantially according to the type, complexity, novelty, and intended use and market of the
potential products. The regulatory approval process for product candidates such as ours can be more expensive and take
longer than for other, better known, or more extensively studied pharmaceutical or other product candidates. Further, as we
are developing novel treatments for diseases in which there is little clinical experience with new endpoints and
methodologies, there is heightened risk that the FDA, MHRA, EMA or other regulatory bodies may not consider the
clinical trial endpoints to provide clinically meaningful results, and the resulting clinical data and results may be more
difficult to analyze. The prospectively designed natural history studies with the same endpoints as our corresponding
clinical trials may not be accepted by the FDA, MHRA, EMA or other regulatory authorities. Regulatory agencies
administering existing or future regulations or legislation may not allow production and marketing of products utilizing
gene regulation technology in a timely manner or under technically or commercially feasible conditions. In addition,
regulatory action or private litigation could result in expenses, delays, or other impediments to our research programs or the
commercialization of resulting products.

The regulatory review committees and advisory groups described above and the new guidelines they promulgate
may lengthen the regulatory review process, require us to perform additional preclinical studies or clinical trials, increase
our development costs, lead to changes in regulatory positions and interpretations, delay or prevent approval and
commercialization of these treatment candidates, or lead to significant post-approval limitations or restrictions. As we
advance our research programs and develop future product candidates, we will be required to consult with these regulatory
and advisory groups and to comply with applicable guidelines. If we fail to do so, we may be required to delay or
discontinue development of any product candidates we identify and develop.

Clinical trials are expensive, time-consuming, difficult to design and implement, and involve an uncertain outcome.
Further, we may encounter substantial delays in our clinical trials.

The clinical trials and manufacturing of our product candidates are, and the manufacturing and marketing of our

products, if approved, will be, subject to extensive and rigorous review and regulation by numerous government authorities
in the United States and in other countries where we intend to test and market our product candidates. Before obtaining
regulatory approvals for the commercial sale of any of our product candidates, we must demonstrate through lengthy,
complex and expensive preclinical testing and clinical trials that our product candidates are both safe and effective for use
in each target indication. In particular, because our product candidates are subject to regulation as biological drug products,
we will need to demonstrate that they are safe, pure, and potent for use in their target indications. Each product candidate
must demonstrate an adequate risk versus benefit profile in its intended patient population and for its intended use.

Clinical testing is expensive, can take many years to complete and is subject to uncertainty. We cannot guarantee

that any clinical trials will be conducted as planned or completed on schedule, if at all. Failure can occur at any time during
the clinical trial process. Even if our future clinical trials are completed as planned, we cannot be certain that their results
will support the safety and effectiveness of our product candidates for their targeted indications. Our future clinical trial
results may not be successful.

In addition, even if such trials are successfully completed, we cannot guarantee that the FDA, MHRA, EMA or

other regulatory authorities will interpret the results as we do, and more trials could be required before we submit our
product candidates for approval. To the extent that the results of the trials are not satisfactory to the FDA, MHRA, EMA or
other regulatory authorities for support of a marketing authorization application, we may be required to expend significant
resources, which may not be available to us, to conduct additional trials in support of potential approval of our product
candidates.

To date, we have not completed any clinical development programs required for the approval of any of our
product candidates. Although we are currently conducting several ongoing clinical development programs, we may
experience delays in conducting any clinical trials and we do not know whether our ongoing and future clinical trials will

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begin on time, need to be redesigned, recruit and enroll patients on time or be completed on schedule, or at all. Events that
may prevent successful or timely completion of clinical development include:

● inability to generate sufficient preclinical, toxicology, or other in vivo or in vitro data to support the initiation

of clinical trials;

● delays in sufficiently developing, characterizing or controlling a manufacturing process suitable for advanced

clinical trials;

● delays in developing suitable assays for screening patients for eligibility for trials with respect to certain

product candidates;

● delays in reaching agreement with the FDA, MHRA, EMA or other regulatory authorities as to the design or

implementation of our clinical trials;

● obtaining regulatory approval to commence a clinical trial;

● reaching an agreement on acceptable terms with clinical trial sites or prospective contract research

organizations, or CROs, the terms of which can be subject to extensive negotiation and may vary
significantly among different clinical trial sites;

● obtaining IRB approval at each site;

● recruiting suitable patients to participate in a clinical trial;

● developing and validating the companion diagnostic to be used in a clinical trial, if applicable;

● having patients complete a clinical trial or return for post-treatment follow-up;

● clinical sites, CROs, or other third parties deviating from trial protocol or dropping out of a trial;

● failure to perform in accordance with the FDA’s good clinical practice, or GCP, requirements, or applicable

regulatory guidelines in other countries;

● addressing patient safety concerns that arise during the course of a trial, including occurrence of adverse

events associated with the product candidate that are viewed to outweigh its potential benefits;

● adding a sufficient number of clinical trial sites; or

● manufacturing sufficient quantities of our product candidates for use in clinical trials.

We may experience numerous unforeseen events during, or as a result of, clinical trials that could delay or prevent
our ability to receive marketing approval or commercialize our product candidates or significantly increase the cost of such
trials, including:

● we may experience changes in regulatory requirements or guidance, or receive feedback from regulatory

authorities that requires us to modify the design of our clinical trials;

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● clinical trials of our product candidates may produce negative or inconclusive results, and we may decide, or

regulators may require us, to conduct additional clinical trials or abandon development programs;

● the number of patients required for clinical trials of our product candidates may be larger than we anticipate,
enrollment in these clinical trials may be slower than we anticipate, or participants may drop out of these
clinical trials at a higher rate than we anticipate;

●

our third-party contractors may fail to comply with regulatory requirements or meet their contractual
obligations to us in a timely manner, or at all;

● we or our investigators might have to suspend or terminate clinical trials of our product candidates for
various reasons, including non-compliance with regulatory requirements, a finding that our product
candidates have undesirable side effects or other unexpected characteristics, or a finding that the participants
are being exposed to unacceptable health risks;

● the cost of clinical trials of our product candidates may be greater than we anticipate, and we may not have

funds to cover the costs;

● the supply or quality of our product candidates or other materials necessary to conduct clinical trials of our

product candidates may be insufficient or inadequate;

● business interruptions resulting from geopolitical actions, including war and terrorism, or a widespread

health emergency, such as the COVID-19 pandemic, or natural disasters including earthquakes, typhoons,
floods and fires, or from economic or political instability; and

● any future collaborators that conduct clinical trials may face any of the above issues, and they may conduct

clinical trials in ways they view as advantageous to them but that are suboptimal for us.

If we are required to conduct additional clinical trials or other testing of our product candidates beyond those that
we  currently  contemplate,  if  we  are  unable  to  successfully  complete  clinical  trials  of  our  product  candidates  or  other
testing, if the results of these trials or tests are not positive or are only modestly positive or if there are safety concerns, we
may:

● incur unplanned costs;

● be delayed in obtaining marketing approval for our product candidates or not obtain marketing approval at

all;

● obtain marketing approval in some countries and not in others;

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

● obtain marketing approval with labeling that includes significant use or distribution restrictions or safety

warnings, including boxed warnings;

● be subject to additional post-marketing testing requirements; or

● have the product removed from the market after obtaining marketing approval.

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We could encounter delays if a clinical trial is suspended or terminated by us, by the IRBs of the institutions in

which such trials are being conducted, by the Data Safety Monitoring Board, or DSMB, for such trial or by the FDA,
MHRA, EMA or other regulatory authorities. Such authorities may impose such a suspension or termination due to a
number of factors, including failure to conduct the clinical trial in accordance with regulatory requirements or our clinical
protocols, inspection of the clinical trial operations or trial site by the FDA, MHRA, EMA or other regulatory authorities
resulting in the imposition of a clinical hold, unforeseen safety issues or adverse side effects, failure to demonstrate a
benefit from using a drug, changes in governmental regulations or administrative actions or lack of adequate funding to
continue the clinical trial.

Our Most Advanced Product Candidates will require extensive clinical testing before we are prepared to submit a

BLA or MAA for regulatory approval. We cannot predict with any certainty if or when we might complete the clinical
development for our product candidates and submit a BLA or MAA for regulatory approval of any of our product
candidates or whether any such BLA or MAA will be approved. We may also seek feedback from the FDA, MHRA, EMA
or other regulatory authorities on our clinical development program, and the FDA, MHRA, EMA or such regulatory
authorities may not provide such feedback on a timely basis, or such feedback may not be favorable, which could further
delay our development programs.

If we experience delays in the commencement or completion of our clinical trials, or if we terminate a clinical trial

prior to completion, the commercial prospects of our product candidates could be harmed, and our ability to generate
revenues from our product candidates may be delayed. In addition, any delays in our clinical trials could increase our costs,
slow down the development and approval process and jeopardize our ability to commence product sales and generate
revenues. Any of these occurrences may harm our business, financial condition and results of operations. In addition, many
of the factors that cause, or lead to, a delay in the commencement or completion of clinical trials may also ultimately lead
to the denial of regulatory approval 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. Incidence and 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
used in developing an estimated incidence and prevalence range for the indications we are targeting has involved collating
limited data from multiple sources. Accordingly, the incidence and prevalence estimates included, or supporting the
information, in our SEC filings and other materials should be viewed with caution. Further, the data and statistical
information included, or supporting the information, in our SEC filings and other materials, 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 UK, the EU 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.

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Negative public opinion of gene therapy and increased regulatory scrutiny of gene therapy and genetic research may
adversely impact public perception of our current and future product candidates.

Our potential therapeutic products involve introducing genetic material into patients’ cells. The clinical and

commercial success of our potential products will depend in part on public acceptance of the use of gene therapy and gene
regulation for the prevention or treatment of human diseases. Public attitudes may be influenced by claims that gene
therapy and gene regulation are unsafe, unethical, or immoral, and, consequently, our products may not gain the acceptance
of the public or the medical community. Adverse public attitudes may adversely impact our ability to enroll clinical trials.
Moreover, our success will depend upon physicians prescribing, and their patients being willing to receive, treatments that
involve the use of product candidates we may develop in lieu of, or in addition to, existing treatments with which they are
already familiar and for which greater clinical data may be available.

More restrictive government regulations or negative public opinion would have a negative effect on our business

or financial condition and may delay or impair the development and commercialization of our product candidates or
demand for any products once approved. For example, in 2003, trials using early versions of murine gamma-retroviral
vectors, which integrate with, and thereby alter, the host cell’s DNA, have led to several well-publicized adverse events,
including reported cases of leukemia. Although none of our current product candidates utilize murine gamma-retroviral
vectors, our product candidates use a viral delivery system. Adverse events in our clinical trials, even if not ultimately
attributable to our product candidates, and the resulting publicity could result in increased governmental regulation,
unfavorable public perception, potential regulatory delays in the testing or approval of our product candidates or the halting
of clinical trials, stricter labeling requirements for those product candidates that are approved and a decrease in demand for
any such product candidates. The risk of cancer remains a concern for gene therapy and we cannot assure that it will not
occur in any of our planned or future clinical trials. In addition, there is the potential risk of delayed adverse events
following exposure to gene therapy products due to persistent biological activity of the genetic material or other
components of products used to carry the genetic material. If any such adverse events occur, commercialization of our
product candidates or further advancement of our clinical trials could be halted or delayed, which would have a negative
impact on our business and operations.

Even  though  we  have  been  granted  access  to  certain  regulatory  authority  designations  that  may  expedite  the
development  or  regulatory  review  of  certain  of  our  product  candidates,  in  the  future  we  may  seek  and  fail  to  obtain
access to such designations for other of our current or potential future product candidates. Such designations or access
may also not lead to faster development or regulatory review or approval, and it does not increase the likelihood that our
product candidates will receive marketing approval.

A sponsor may seek approval of its product candidate under programs designed to accelerate the FDA’s review

and approval of new drugs and biological products that meet certain criteria. For example, the FDA has a Fast Track
program that is intended to expedite or facilitate the process for reviewing new products that meet certain criteria.
Specifically, new drugs and biological products are eligible for Fast Track designation if they are intended to treat a serious
or life-threatening disease or condition and demonstrate the potential to address unmet medical needs, or if the drug has
been designated as a qualified infectious disease product. Fast Track designation applies to the combination of the product
and the specific indication for which it is being studied. Under Fast Track, the FDA may consider for review sections of the
BLA on a rolling basis before the complete application is submitted if relevant criteria are satisfied, including an agreement
with FDA on the proposed schedule for the submission of portions of the BLA, and the payment of applicable user fees
before FDA may initiate a review. Even if Fast Track designation is granted, it may be rescinded if the product no longer
meets the qualifying criteria. In April 2018, AAV-RPGR was designated a Fast Track program by the FDA for the
treatment of X-linked retinitis pigmentosa owing to defects in RPGR. In August 2018, AAV-CNGB3 was designated a Fast
Track program by the FDA for the treatment of achromatopsia caused by CNGB3 mutations. In January 2021, AAV-
CNGA3 was designated a Fast Track program by the FDA for the treatment of achromatopsia caused by CNGA3
mutations.

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Similarly, the EMA has established the PRIME scheme to expedite the development and review of product

candidates that show a potential to address to a significant extent an unmet medical need, based on early clinical data. In
February 2018, AAV-CNGB3 in the treatment of achromatopsia associated with defects in CNGB3 was admitted to the
PRIME scheme of the EMA. In February 2020, AAV-RPGR for the treatment of X-linked retinitis pigmentosa owing to
defects in RPGR was admitted to the PRIME scheme of the EMA.

A sponsor may also seek an RMAT for its product candidates. In 2017, the FDA established the RMAT 

designation as part of its implementation of the 21st Century Cures Act. A biological product is eligible for RMAT 
designation if it qualifies as an RMAT, which is defined as a cell therapy, therapeutic tissue engineering product, human 
cell and tissue product, or any combination product using such therapies or products, with limited exceptions, and is 
intended to treat, modify, reverse, or cure a serious or life-threatening disease or condition and for which preliminary 
clinical evidence indicates that the biological product has the potential to address unmet medical needs for such a disease 
or condition. In a February 2019 final guidance, the FDA also stated that certain gene therapies that lead to a sustained 
effect on cells or tissues may meet the definition of a regenerative medicine therapy.  RMAT designation provides potential 
benefits that include more frequent meetings with FDA to discuss the development plan for the product candidate, and 
eligibility for rolling review and priority review.  Products granted RMAT designation may also be eligible for accelerated 
approval on the basis of a surrogate or intermediate endpoint reasonably likely to predict long-term clinical benefit, or 
reliance upon data obtained from a meaningful number of sites, including through expansion to additional sites.  RMAT-
designated products that receive accelerated approval may, as appropriate, fulfill their post-approval requirements through 
the submission of clinical evidence, clinical trials, patient registries, or other sources of real world evidence (such as 
electronic health records); through the collection of larger confirmatory data sets; or via post-approval monitoring of all 
patients treated with such therapy prior to approval of the therapy.

Such regulatory designations are within the discretion of the FDA, MHRA, EMA and other regulatory authorities.

Accordingly, even if we believe one of our product candidates meets the criteria for such regulatory programs designed to
accelerate the review and approval of new drugs and we seek such designations, the FDA, MHRA, EMA or other
applicable regulatory authority may disagree and instead determine not to make such designation for such product
candidate. We cannot be sure that our evaluation of our product candidates as qualifying for such regulatory designations
will meet the regulatory authority’s expectations. In any event, the receipt of such regulatory designations for a product
candidate may not result in a faster development process, review, or approval compared to product candidates considered
for approval under conventional regulatory procedures and does not assure ultimate approval by the regulatory authorities.
In addition, even if additional product candidates are granted such regulatory designations, the regulatory authority may
later decide that such product candidates no longer meet the conditions for qualification or decide that the time period for
review or approval will not be shortened.

We have received orphan drug designation from the FDA and EMA for AAV-CNGB3, AAV-CNGA3, AAV-RPE65, AAV-
RPGR,  AAV-AIPL1,  AAV-RDH12  and  from  the  FDA  for  AAV-AQP1  and  may  seek  orphan  drug  designation  for
additional product candidates in the future, but any orphan drug designations we have received or may receive in the
future may not confer marketing exclusivity or other expected benefits.

Under the Orphan Drug Act, the FDA may designate a product as an orphan drug if it is intended to treat a rare

disease or condition, defined as one occurring in a patient population of fewer than 200,000 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 will be recovered from sales in the United States. In the EU, the 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 EU. Additionally, designation is granted for products intended for the diagnosis, prevention, or
treatment of a life-threatening, seriously debilitating, or serious and chronic condition when, without incentives, it is
unlikely that sales of the drug in the EU would be sufficient to justify the necessary investment in developing the drug or
biological product or where there is no satisfactory method of diagnosis, prevention, or treatment, or, if such a method
exists, the medicine must be of significant benefit to those affected by the condition.

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In the United States, orphan drug designation entitles a party to financial incentives such as opportunities for grant

funding towards clinical trial costs, tax credits for qualified clinical testing, and user-fee waivers. In addition, if a product
receives the first FDA approval of that drug for the indication for which it has orphan designation, the product is entitled to
orphan drug exclusivity, which means the FDA may not approve any other application to market the same drug for the
same indication for a period of seven years, except in limited circumstances, such as a showing of clinical superiority over
the product with orphan exclusivity or where the manufacturer is unable to assure the availability of sufficient quantities of
the orphan drug to meet the needs of patients with the rare disease or condition. Under the FDA’s regulations, the FDA will
deny orphan drug exclusivity to a designated drug upon approval if the FDA has already approved another drug with the
same principal molecular structural features, in the case of a biologic, for the same indication, unless the drug is
demonstrated to be clinically superior to the previously approved drug. In the EU, orphan drug designation entitles a party
to financial incentives such as reduction of fees or fee waivers and ten years of market exclusivity following approval for
the approved therapeutic indication. This period may be reduced to six years if, at the end of the fifth year, the orphan drug
designation criteria are no longer met, including where it is shown that the drug is sufficiently profitable not to justify
maintenance of market exclusivity. In the EU, a marketing authorization for an orphan designated product will not be
granted if a similar drug has been approved in the EU for the same therapeutic indication, unless the applicant can establish
that its product is safer, more effective or otherwise clinically superior. A similar drug is a product containing a similar
active substance or substances as those contained in an already authorized product. Similar active substance is defined as
an identical active substance, or an active substance with the same principal molecular structural features (but not
necessarily all of the same molecular features) and which acts via the same mechanism.

Products with an orphan designation in the EU may be considered for a Great Britain orphan marketing

authorization. However, where centrally authorized MAs have an existing EU orphan designation, these have been
converted into Great Britain MAs and shall continue in effect with the remaining period of orphan market exclusivity.
Since the end of the Brexit transition period, there has been no route to obtain pre-MA orphan designation in Great Britain,
however, as a result of the implementation of the Protocol on Ireland and Northern Ireland, EU orphan drug designation
and time periods of market exclusivity still remain valid for marketing products in Northern Ireland. Instead, the MHRA
now reviews applications for Great Britain orphan designation in parallel with the corresponding MA application. Market
exclusivity periods between those approved by the MHRA may vary to products which already have an EU orphan
designation.

We have obtained orphan drug designation from the FDA and EMA for AAV-CNGB3 for the treatment of

achromatopsia caused by mutations in the CNGB3 gene, for AAV-CNGA3 for the treatment of achromatopsia due to
autosomal-recessive CNGA3 gene mutations, for AAV-RPE65 for the treatment of Leber congenital amaurosis, for AAV-
RPGR for the treatment of retinitis pigmentosa, for AAV-AIPL1 for the treatment of inherited retinal dystrophy due to
defects in AIPL1 gene and for AAV-RDH12 for the treatment of retinol dehydrogenase 12 (RDH12) mutation-associated
retinal dystrophy, and we obtained orphan drug designation from the FDA for AAV-AQP1 for the treatment of grade 2 and
grade 3 late xerostomia from parotid gland hypofunction caused by radiotherapy. We may seek orphan drug designation for
other current and future product candidates in the future. Even with orphan drug designation, we may not be the first to
obtain marketing approval for any particular orphan indication due to the uncertainties associated with developing
pharmaceutical products, which could prevent us from marketing our product candidates if another company is able to
obtain orphan drug exclusivity before we do. In addition, exclusive marketing rights in the United States may be
unavailable if we seek approval for an indication broader than the orphan-designated indication or may be lost in the
United States if the FDA later determines that the request for designation was materially defective or if we are unable to
assure sufficient quantities of the drug to meet the needs of patients with the rare disease or condition following approval.
Further, even if we obtain orphan drug exclusivity, that exclusivity may not effectively protect our product candidates from
competition because different drugs with different active moieties can be approved for the same condition. In addition, the
FDA can subsequently approve products with the same principal molecular structural features, in the case of a biologic, for
the same condition if the FDA concludes that the later drug is safer, more effective, or makes a major contribution to
patient care. Likewise, in the EU and Great Britain, the EMA or MHRA, respectively, can approve a similar drug for the
same therapeutic indication, if it concludes that the later drug is safer, more effective or

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clinically superior. Orphan drug designation neither shortens the development time or regulatory review time of a drug nor
gives the drug any advantage in the regulatory review or approval process. In addition, while we intend to seek orphan drug
designation for other existing and future product candidates, we may never receive such designations. There have been
legal challenges to aspects of the FDA’s regulations and policies concerning the exclusivity provisions of the Orphan Drug
Act, and future challenges could lead to changes that affect the protections afforded our product candidates in ways that are
difficult to predict. It is uncertain how ongoing and future challenges might affect our business.

We and our contract manufacturers for plasmid are subject to significant regulation with respect to manufacturing our
products. Our manufacturing facilities and the third-party manufacturing facilities which we rely on may not continue
to meet regulatory requirements and have limited capacity.

We currently have relationships with a limited number of suppliers for the manufacturing of plasmid, a component
of our viral vectors and product candidates. We completed the fit-out of our cGMP manufacturing facility in early 2018 and
we completed the acquisition of our second cGMP viral vector manufacturing facility and our first cGMP plasmid and
DNA production facility in Shannon, Ireland in January 2021 to expand our manufacturing and supply chain capabilities.
However, if we experience slowdowns or problems with our completed facility or the development and startup of our new
facilities and are unable to establish or scale our internal manufacturing capabilities, we will need to continue to contract
with manufacturers that can produce the preclinical, clinical and commercial supply of our products. Each supplier may
require licenses to manufacture such components if such processes are not owned by the supplier or in the public domain
and we may be unable to transfer or sublicense the intellectual property rights we may have with respect to such activities.

All entities involved in the preparation of therapeutics for clinical trials or commercial sale, including our existing

contract manufacturers for components of our product candidates, are subject to extensive regulation. Components of a
finished therapeutic product approved for commercial sale or used in late-stage clinical trials must be manufactured in
accordance with cGMP. These regulations govern manufacturing processes and procedures (including record keeping) and
the implementation and operation of quality systems to control and assure the quality of investigational products and
products approved for sale. Poor control of production processes can lead to the introduction of adventitious agents or other
contaminants, or to inadvertent changes in the properties or stability of our product candidates that may not be detectable in
final product testing. We or our contract manufacturers must supply all necessary documentation in support of a BLA or
MAA on a timely basis. Our facilities and quality systems and the facilities and quality systems of some or all of our third-
party contractors must pass a pre-approval inspection for compliance with the applicable regulations as a condition of
regulatory approval of our product candidates or any of our other potential products. In addition, the regulatory authorities
may, at any time, audit or inspect a manufacturing facility involved with the preparation of our product candidates or our
other potential products or the associated quality systems for compliance with the regulations applicable to the activities
being conducted. If these facilities do not pass a pre-approval plant inspection, FDA, EMA or other regulatory approval of
the products will not be granted.

If any such inspection or audit identifies a failure to comply with applicable regulations or if a violation of our

product specifications or applicable regulations occurs independent of such an inspection or audit, we or the relevant
regulatory authority may require remedial measures that may be costly and/or time-consuming for us or a third party 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 facility. Any such remedial measures imposed upon us or third parties with whom we
contract could harm our business. If we or any of our third-party manufacturers fail to maintain regulatory compliance, the
FDA, MHRA, EMA or other regulatory authorities can impose regulatory sanctions including, among other things, refusal
to approve a pending application for a new drug product or biologic product, or revocation of a pre-existing approval. As a
result, our business, financial condition and results of operations may be harmed. Additionally, if supply from one
approved manufacturer is interrupted, there could be a significant disruption in commercial supply. An alternative
manufacturer would need to be qualified through a BLA and/or MAA supplement which could result in further delay. The
regulatory agencies may also require additional studies if a new manufacturer is relied upon for

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commercial production. Switching manufacturers may involve substantial costs and is likely to result in a delay in our
desired clinical and commercial timelines.

These factors could cause the delay of clinical trials, regulatory submissions, required approvals or
commercialization of our product candidates, cause us to incur higher costs and prevent us from commercializing our
products successfully. Furthermore, if our suppliers fail to meet contractual requirements, and we are unable to secure one
or more replacement suppliers capable of production at a substantially equivalent cost, our clinical trials may be delayed, or
we could lose potential revenue.

Any  contamination  in  our  manufacturing  process,  shortages  of  raw  materials  or  failure  of  our  plasmid  supplier  to
deliver  necessary  components,  or  other  issues  with  the  manufacturing  process,  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. In addition, our manufacturing 
process is complex, and the manufacturing batch cycle period can be several weeks long.  Each batch cycle may not yield 
planned quantities or meet the required standards. A material shortage, contamination, recall or restriction on the use of 
biologically derived substances in the manufacture of our product candidates, or other issues with our manufacturing 
process, 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.

Expanding our manufacturing capacity has and will continue to be costly and we may be unsuccessful in doing so in a
timely  manner,  which  could  delay  our  current  and  future  clinical  development  programs,  or  delay  the
commercialization of our product candidates.

In addition to our existing manufacturing facility in London, United Kingdom, we may lease, operate, purchase, 

or construct additional facilities to conduct expanded manufacturing or other related activities in the future. In January 
2021, we completed the acquisition of our second cGMP viral vector manufacturing facility and our first cGMP plasmid 
and DNA production facility in Shannon, Ireland.  Expanding our manufacturing capacity to produce the preclinical, 
clinical and commercial supply of our products and their components will require completing the development and startup 
of our new facilities in Ireland, substantial additional expenditures, time, and various regulatory approvals and permits, all 
of which may be impacted by the COVID-19 pandemic. Further, we will need to hire and train significant numbers of 
employees and managerial personnel to staff our expanding manufacturing and supply chain operations, including in our 
new facilities in Ireland. Start-up costs can be large, and scale-up entails significant risks related to process development 
and manufacturing yields. In addition, we may face difficulties or delays in developing or acquiring the necessary 
production equipment and technology to manufacture sufficient quantities of our product candidates for use in clinical 
trials and, should they be approved, to supply the commercial market at reasonable costs and in compliance with applicable 
regulatory requirements. We may not successfully expand or establish sufficient manufacturing capabilities or manufacture 
our products economically or in compliance with cGMP and other regulatory requirements, and we and our collaborators 
may not be able to build or procure additional capacity in the required timeframe to meet the requirements of our clinical 
programs or to meet potential commercial demand for our product candidates. This could also delay or require us to 
discontinue one or more of our clinical development programs or could interfere with our efforts to successfully 
commercialize our products. As a result, our business, prospects, operating results, and financial condition could be 
materially harmed.

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If we encounter difficulties enrolling patients in our clinical trials, our clinical development activities could be delayed
or otherwise adversely affected.

The timely completion of clinical trials in accordance with their protocols depends, among other things, on our

ability to enroll a sufficient number of patients who remain in the study until its conclusion. The natural history studies may
fail to provide us with patients for our clinical trials because patients enrolled in the natural history studies may not be good
candidates for our clinical trials or may choose to not enroll in our clinical trials. We may encounter delays in enrolling, or
be unable to enroll, a sufficient number of patients to complete any of our clinical trials, and even once enrolled we may be
unable to retain a sufficient number of patients to complete any of our trials. This may result in increased costs, program
delays or both, which could have a harmful effect on our ability to develop our product candidates, or could render further
development impossible. The enrollment of patients depends on many factors, including:

● the size and nature of the patient population;

● the patient eligibility criteria defined in the protocol;

● the size of the patient population required for analysis of the trial’s primary endpoints;

● the proximity of patients to study sites;

● the design of the trial or side effects that may arise in development;

● our ability to recruit clinical trial investigators with the appropriate competencies and experience;

● clinicians’ and patients’ perceptions as to the potential advantages of the product candidate being studied in
relation to other available therapies, including any new products that may be approved for the indications we
are investigating;

● our ability to obtain and maintain patient consents;

● the risk that patients enrolled in clinical trials will drop out of the trials before completion; and

● business interruptions resulting from geopolitical actions, including war and terrorism, or widespread health
emergencies, such as the COVID-19 pandemic, or natural disasters including earthquakes, typhoons, floods
and fires, or from economic or political instability.

In addition, other clinical trials for product candidates that are in the same therapeutic areas as our product

candidates or approved products for the same clinical indications (such as Luxturna marketed by Spark Therapeutics, Inc.
for the treatment of RPE65-associated retinal disease) may reduce the number and type of patients available to us.

Our product candidates may cause serious adverse events or undesirable side effects or have other properties which may
delay or prevent their regulatory approval, limit the commercial profile of an approved label, or, result in significant
negative consequences following marketing approval, if any.

Serious adverse events or undesirable side effects caused by our product candidates could cause us or regulatory

authorities to interrupt, delay or halt clinical trials and could result in a more restrictive label or the delay or denial of
regulatory approval by the FDA, EMA or other authorities. Results of our clinical trials could reveal a high and
unacceptable severity and prevalence of side effects, toxicities or unexpected characteristics, including death. A risk in any
gene therapy product based on viral vectors is the risk of insertional mutagenesis.

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If unacceptable side effects or deaths arise in the development of our product candidates, we, the FDA, the IRBs

at the institutions in which our studies are conducted, DSMB, EMA or CAT could suspend or terminate our clinical trials or
the FDA, EMA or other regulatory authorities could order us to cease clinical trials or deny approval of our product
candidates for any or all targeted indications. Undesirable side effects or deaths in clinical trials with our product
candidates may cause the FDA or comparable foreign regulatory authorities to place a clinical hold on the associated
clinical trials, to require additional studies, or otherwise to delay or deny approval of our product candidates for any or all
targeted indications. Treatment-related side effects could also affect patient recruitment or the ability of enrolled patients to
complete the trial or result in potential product liability claims. In addition, these side effects may not be appropriately
recognized or managed by the treating medical staff. We expect to have to train medical personnel using our product
candidates to understand the side effect profiles for our clinical trials and upon any commercialization of any of our
product candidates. Inadequate training in recognizing or managing the potential side effects of our product candidates
could result in patient injury or death. Any of these occurrences may harm our business, financial condition and prospects
significantly.

If any of our product candidates receives marketing approval, and we or others later identify undesirable side

effects caused by any such product, including during any long-term follow-up observation period recommended or required
for patients who receive treatment using our products, a number of potentially significant negative consequences could
result, including:

● regulatory authorities may withdraw approvals of such product;

● we may be required to recall a product or change the way such product is administered to patients;

● additional restrictions may be imposed on the marketing of the particular product or the manufacturing

processes for the product;

● regulatory authorities may require additional warnings on the label, such as a “black box” warning or

contraindication;

● we may be required to implement a Risk Evaluation and Mitigation Strategy, or REMS, or create a

medication guide outlining the risks of such side effects for distribution to patients;

● the product could become less competitive;

● 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 the particular product

candidate, if approved, and could significantly harm our business, results of operations and prospects.

Success in preclinical studies or clinical trials may not be indicative of results in future clinical trials.

Results from previous preclinical studies or clinical trials are not necessarily predictive of future clinical trial

results, and interim results of a clinical trial are not necessarily indicative of final results. Our product candidates may fail
to show the desired safety and efficacy in clinical development despite positive results in preclinical studies or having
successfully advanced through initial clinical trials.

Success in preclinical testing and early clinical trials does not ensure that later clinical trials will generate the same

results or otherwise provide adequate data to demonstrate the efficacy and safety of a product candidate.

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Frequently, product candidates that have shown promising results in early clinical trials have subsequently suffered
significant setbacks in later clinical trials. In addition, the design of a clinical trial can determine whether its results will
support approval of a product and flaws in the design of a clinical trial may not become apparent until the clinical trial is
well advanced. We have limited experience designing clinical trials and may be unable to design and execute a clinical trial
to support regulatory approval. There is a high failure rate for drugs and biologic products proceeding through clinical
trials. Data obtained from preclinical and clinical activities are subject to varying interpretations, which may delay, limit or
prevent regulatory approval, which could negatively impact our business, financial condition, results of operations and
prospects.

The regulatory approval processes of the FDA, MHRA, EMA and other regulatory authorities are lengthy, time
consuming and inherently unpredictable, and if we are ultimately unable to obtain regulatory approval for our product
candidates, our business will be substantially harmed.

The time required to obtain approval by the FDA, MHRA, EMA and other regulatory authorities is unpredictable

but typically takes many years following the commencement of clinical trials and depends upon numerous factors,
including the substantial discretion of the regulatory authorities. In addition, approval policies, regulations, or the type and
amount of clinical data necessary to gain approval may change during the course of a product candidate’s clinical
development and may vary among jurisdictions. We have not obtained regulatory approval for any product candidate and it
is possible that none of our product candidates in clinical programs or any other product candidates we may seek to
develop in the future will ever obtain regulatory approval. Neither we nor any future collaborator is permitted to market
any of our product candidates in the United States, the UK or the EU until we receive regulatory approval of a BLA from
the FDA or an MAA from the MHRA or EMA, respectively. It is possible that the FDA may refuse to accept for
substantive review any BLAs, or the MHRA or EMA any of our MAAs, that we submit for our product candidates or may
conclude after review of our data that our application is insufficient to obtain marketing approval of our product candidates.

Prior to obtaining approval to commercialize a product candidate in the United States, the UK, the EU or
elsewhere, we or our collaborators must demonstrate with substantial evidence from well-controlled clinical trials, and to
the satisfaction of the FDA, MHRA, EMA or foreign regulatory agencies, that such product candidates are safe and
effective for their intended uses. Results from nonclinical studies and clinical trials can be interpreted in different ways.
Even if we believe the nonclinical or clinical data for our product candidates are promising, such data may not be sufficient
to support approval by the FDA, MHRA, EMA or other regulatory authorities. The FDA, MHRA or EMA may also require
us to conduct additional preclinical studies or clinical trials for our product candidates either prior to or post-approval, or it
may object to elements of our clinical development program. Depending on the extent of these or any other FDA, MHRA
or EMA required studies, approval of any regulatory approval applications that we submit may be delayed by several years,
or may require us to expend significantly more resources than we have available.

Of the large number of potential products in development, only a small percentage successfully complete the

FDA, MHRA, EMA or other foreign regulatory approval processes and are commercialized. The lengthy approval process
as well as the unpredictability of future clinical trial results may result in our failing to obtain regulatory approval to market
our product candidates, which would significantly harm our business, results of operations and prospects.

Even if we and / or our Collaboration Agreement partner obtain FDA, MHRA or EMA approval for AAV-GAD, AAV-
RPGR, AAV-CNGB3, AAV-CNGA3, AAV-RPE65 or AAV-AQP1 in the United States or EU, we may never obtain
approval for or commercialize it in any other jurisdiction, which would limit our ability to realize their full market
potential.

In order to market any products in any particular jurisdiction, we must establish and comply with numerous and
varying regulatory requirements on a country-by-country basis regarding safety and efficacy. Approval by the FDA in the
United States, the MHRA in the UK or the EMA in the EU does not ensure approval by regulatory authorities in

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other countries or jurisdictions. However, the failure to obtain approval in one jurisdiction may negatively impact our
ability to obtain approval elsewhere. In addition, clinical trials conducted in one country may not be accepted by regulatory
authorities in other countries, and regulatory approval in one country does not guarantee regulatory approval in any other
country.

Approval processes vary among countries and can involve additional product testing and validation and additional

administrative review periods. Seeking foreign regulatory approval could result in difficulties and increased costs for us
and require additional preclinical studies or clinical trials which could be costly and time consuming. Regulatory
requirements can vary widely from country to country and could delay or prevent the introduction of our products in those
countries. We do not have any product candidates approved for sale in any jurisdiction, including in international markets,
and we do not have experience in obtaining regulatory approval in international markets. If we fail to comply with
regulatory requirements in international markets or to obtain and maintain required approvals, or if regulatory approvals in
international markets are delayed, our target market will be reduced and our ability to realize the full market potential of
any product we develop will be unrealized.

Even if we receive regulatory approval of one or more of our product candidates, we will be subject to ongoing
regulatory obligations and continued regulatory review, which may result in significant additional expense, and we may
be subject to penalties if we fail to comply with regulatory requirements or experience unanticipated problems with our
product candidates.

Any product candidate for which we obtain marketing approval, along with the manufacturing processes, post-
approval clinical data, labeling, packaging, distribution, adverse event reporting, storage, recordkeeping, export, import,
advertising and promotional activities for such product, among other things, will be subject to extensive and ongoing
requirements of and review by the FDA, MHRA, EMA and other regulatory authorities. These requirements include
submissions of safety and other post-marketing information and reports, establishment registration and drug listing
requirements, continued compliance with cGMP requirements relating to manufacturing, quality control, quality assurance
and corresponding maintenance of records and documents, requirements regarding the distribution of samples to physicians
and recordkeeping and GCP requirements for any clinical trials that we conduct post-approval.

The FDA, MHRA and EMA closely regulate the post-approval marketing and promotion of genetic therapy
medicines to ensure they are marketed only for the approved indications and in accordance with the provisions of the
approved labeling. The FDA, MHRA and EMA imposes stringent restrictions on manufacturers’ communications
regarding off-label use and if we market our products for uses beyond their approved indications, we may be subject to
enforcement action for off-label marketing. Violations of the U.S. federal Food, Drug, and Cosmetic Act, or FDCA,
relating to the promotion of prescription drugs may lead to FDA enforcement actions and investigations alleging violations
of federal and state health care fraud and abuse laws, as well as state consumer protection laws.

In addition, later discovery of previously unknown adverse events or other problems with our products,
manufacturers or manufacturing processes, including adverse events of unanticipated severity or frequency, or with our
third-party manufacturers or manufacturing processes, or failure to comply with regulatory requirements, may yield various
results, including:

● restrictions on manufacturing such products;

● restrictions on the labeling or marketing of a product;

●

restrictions on product distribution or use;

● requirements to conduct post-marketing studies or clinical trials;

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● warning letters or holds on clinical trials;

● withdrawal of the products from the market;

● refusal to approve pending applications or supplements to approved applications that we submit;

● recall of products;

● fines, restitution or disgorgement of profits or revenues;

● suspension or withdrawal of marketing approvals;

● refusal to permit the import or export of our products;

● product seizure or detention; or

● injunctions or the imposition of civil or criminal penalties.

The FDA’s policies may change and additional government regulations may be enacted that could prevent, limit or
delay regulatory approval of our product candidates. We also 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 in other countries. 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 which
would adversely affect our business, prospects and ability to achieve or sustain profitability.

Interim “top-line” and preliminary data from our clinical trials that we announce or publish from time to time may
change as more patient data become available and are subject to audit and verification procedures that could result in
material changes in the final data.

From time to time, we may publish interim “top-line” or preliminary data from our clinical trials. Interim data

from clinical trials that we may complete are subject to the risk that one or more of the clinical outcomes may materially
change as patient enrollment continues and more patient data become available. Preliminary or “top-line” data also remain
subject to audit and verification procedures that may result in the final data being materially different from the preliminary
data we previously published. As a result, interim and preliminary data should be viewed with caution until the final data
are available. Adverse differences between preliminary or interim data and final data could significantly harm our business
prospects.

We may expend our limited resources to pursue a particular product candidate or indication and fail to capitalize on
product candidates or indications that may be more profitable or for which there is a greater likelihood of success.

Because we have limited financial and managerial resources, we focus on research programs and product
candidates that we identify for specific indications. As a result, we may forego or delay pursuit of opportunities with other
product candidates or for other indications that later prove to have greater commercial potential. Our resource allocation
decisions may cause us to fail to timely capitalize on viable commercial products or profitable market opportunities. Our
spending on current and future research and development programs and product candidates for specific indications may not
yield any commercially viable products. If we do not accurately evaluate the commercial potential or target market for a
particular product candidate, we may relinquish valuable rights to that product candidate through collaboration, licensing
or other royalty arrangements in cases in which it would have been more advantageous for us to retain sole development
and commercialization rights to such product candidate.

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Changes in funding for, or disruptions caused by global health concerns impacting, the FDA and other government or
regulatory agencies could hinder their ability to hire and retain key leadership and other personnel, or otherwise
prevent new products and services from being developed, approved or commercialized in a timely manner, which could
negatively impact our business.

The ability of the FDA to review and approve new products can be affected by a variety of factors, including

government budget and funding levels, ability to hire and retain key personnel and accept the payment of user fees,
statutory, regulatory, and policy changes and other events that may otherwise affect the FDA’s ability to perform routine
functions. Average review times at the agency have fluctuated in recent years as a result. In addition, government funding
of other government agencies that fund research and development activities is subject to the political process, which is
inherently fluid and unpredictable.

Disruptions at the FDA and other government or regulatory agencies may also slow the time necessary for new

product candidates to be reviewed and/or approved, which would adversely affect our business. For example, over the last
several years, including for 35 days beginning on December 22, 2018, the U.S. government has shut down several times
and certain regulatory agencies, such as the FDA, have had to furlough critical FDA employees and stop critical activities.

Separately, in response to the COVID-19 pandemic, on March 10, 2020 the FDA announced its intention to 

postpone most inspections of foreign manufacturing facilities and products and subsequently, on March 18, 2020, the FDA 
temporarily postponed routine surveillance inspections of domestic manufacturing facilities.  Subsequently, on July 10, 
2020, the FDA announced its intention to resume certain on-site inspections of domestic manufacturing facilities subject to 
a risk-based prioritization system. The FDA intends to use this risk-based assessment system to identify the categories of 
regulatory activity that can occur within a given geographic area, ranging from mission critical inspections to resumption 
of all regulatory activities. The FDA has developed a rating system to assist in determining when and where it is safest to 
conduct prioritized domestic inspections. Regulatory authorities outside the U.S. may adopt similar restrictions or other 
policy measures in response to the COVID-19 pandemic and may experience delays in their regulatory activities. If a 
prolonged government shutdown occurs, or if global health concerns continue to prevent the FDA or other regulatory 
authorities from conducting business as usual or conducting inspections, reviews or other regulatory activities, it could 
significantly impact the ability of such regulatory authorities to timely review and process our regulatory submissions, 
which could have a material adverse effect on our business.

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Risks Related to Healthcare Laws and Other Legal Compliance Matters

Enacted and future healthcare legislation may increase the difficulty and cost for us to obtain marketing approval of
and commercialize our product candidates and may affect the prices we may set.

In the United States, the UK, the EU and other jurisdictions, there have been, and we expect there will continue to

be, a number of legislative and regulatory changes and proposed changes to the healthcare system that could affect our
future results of operations. In particular, there have been and continue to be a number of initiatives at the U.S. federal and
state levels that seek to reduce healthcare costs and improve the quality of healthcare. For example, in March 2010, the
Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act, or
collectively the ACA, was enacted, which substantially changed the way healthcare is financed by both governmental and
private insurers. Among the provisions of the ACA, those of greatest importance to the pharmaceutical and biotechnology
industries include the following:

● an annual, non-deductible fee payable by any entity that manufactures or imports certain branded

prescription drugs and biologic agents (other than those designated as orphan drugs), which is apportioned
among these entities according to their market share in certain government healthcare programs;

● 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;

● expansion of eligibility criteria for Medicaid programs by, among other things, allowing states to offer

Medicaid coverage to certain individuals with income at or below 133% of the federal poverty level, thereby
potentially increasing a manufacturer’s Medicaid rebate liability;

● a licensure framework for follow on biologic products;

● a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct

comparative clinical effectiveness research, along with funding for such research; and

● establishment of a Center for Medicare & Medicaid Innovation at the Centers for Medicare & Medicaid

Services, or CMS, to test innovative payment and service delivery models to lower Medicare and Medicaid
spending, potentially including prescription drug spending.

Since its enactment, there have been judicial, Congressional and executive branch challenges to certain aspects of

the ACA, and we expect there will be additional challenges and amendments to the ACA in the future. For example, the
Tax Cuts and Jobs Act of 2017, or the Tax Act, included a provision repealing, effective January 1, 2019, the tax-based
shared responsibility payment imposed by the ACA on certain individuals who fail to maintain qualifying health coverage
for all or part of a year that is commonly referred to as the “individual mandate”. Additionally, on December 14, 2018, a
U.S. District Court Judge in Texas ruled that the ACA is unconstitutional in its entirety because the “individual mandate”
was repealed by Congress as part of the Tax Act.

On December 18, 2019, the U.S. Court of Appeals for the 5th Circuit upheld the District Court’s decision that the 

individual mandate was unconstitutional but remanded the case back to the District Court to determine whether the 
remaining provisions of the ACA are invalid as well. On March 2, 2020, the United States Supreme Court granted the 
petitions for writs of certiorari to review this case.  The Supreme Court heard the case in November 2020, with a decision 
expected by June 2021.  It is unclear how these decisions, subsequent appeals, if any, and other efforts to challenge, repeal 
or replace the ACA will impact the law or our business or financial condition. In addition, other 

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legislative changes have been proposed and adopted in the United States since the ACA was enacted. In August 2011, the 
Budget Control Act of 2011, among other things, led to aggregate reductions of Medicare payments to providers of 2% per 
fiscal year. These reductions went into effect in April 2013 and, due to subsequent legislative amendments to the statute, 
will remain in effect through 2030, with the exception of a temporary suspension from May 1, 2020 through March 31, 
2021, unless additional action is taken by Congress. In January 2013, the American Taxpayer Relief Act of 2012 was 
signed into law, which, among other things, further reduced Medicare payments to several types of providers, including 
hospitals, imaging centers and cancer treatment centers, and increased the statute of limitations period for the government 
to recover overpayments to providers from three to five years. These new laws or any other similar laws introduced in the 
future may result in additional reductions in Medicare and other health care funding, which could negatively affect our 
customers and accordingly, our financial operations.

Moreover, payment methodologies may be subject to changes in healthcare legislation and regulatory initiatives. 

For example, CMS may develop new payment and delivery models, such as bundled payment models. In addition, recently 
there has been heightened governmental scrutiny over the manner in which manufacturers set prices for their marketed 
products, which has resulted in several U.S. Congressional inquiries and proposed and enacted federal legislation designed 
to, among other things, bring more transparency to drug pricing, reduce the cost of prescription drugs under Medicare, and 
review the relationship between pricing and manufacturer patient programs.  The likelihood of implementation of any of 
these reform initiatives is uncertain, particularly in light of the Biden administration taking office in January 2021. We 
expect that additional U.S. federal healthcare reform measures will be adopted in the future, any of which could limit the 
amounts that the U.S. federal government will pay for healthcare products and services, which could result in reduced 
demand for our product candidates or additional pricing pressures.

Individual states in the United States have also increasingly passed legislation and implemented regulations

designed to control pharmaceutical and biological product pricing, including price or patient reimbursement constraints,
discounts, restrictions on certain product access and marketing cost disclosure and transparency measures, and, in some
cases, designed to encourage importation from other countries and bulk purchasing. Legally mandated price controls on
payment amounts by third-party payors or other restrictions could harm our business, results of operations, financial
condition and prospects. In addition, regional healthcare authorities and individual hospitals are increasingly using bidding
procedures to determine what pharmaceutical products and which suppliers will be included in their prescription drug and
other healthcare programs. This could reduce the ultimate demand for our product candidates or put pressure on our
product pricing.

In addition, FDA regulations and guidance may be revised or reinterpreted by the FDA in ways that may 
significantly affect our business and our products. For example, the results of the 2020 presidential election may impact our 
business and industry. The Trump administration took several executive actions, including the issuance of a number of 
Executive Orders, that could impose significant burdens on, or otherwise materially delay, the FDA’s ability to engage in 
routine oversight activities such as implementing statutes through rulemaking, issuance of guidance, and review and 
approval of marketing applications. It is difficult to predict whether or how these requirements will be interpreted and 
implemented, or whether they will be rescinded and replaced under the Biden administration.  The policies and priorities of 
an incoming administration are unknown and could materially impact the regulations governing our product candidates.  
Any new regulations or guidance, or revisions or reinterpretations of existing regulations or guidance, may impose 
additional costs or lengthen FDA review times for our product candidates.  We cannot determine how changes in 
regulations, statutes, policies, or interpretations when and if issued, enacted or adopted, may affect our business in the 
future. Such changes could, among other things, require:

● additional clinical trials to be conducted prior to obtaining approval;

● changes to manufacturing methods;

● recalls, replacements, or discontinuance of one or more of our products; and

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● additional recordkeeping.

Such changes would likely require substantial time and impose significant costs, or could reduce the potential

commercial value of our product candidates, and could materially harm our business and our financial results. In addition,
delays in receipt of or failure to receive regulatory clearances or approvals for any other products would harm our business,
financial condition, and results of operations.

In the UK and EU, similar political, economic and regulatory developments may affect our ability to profitably

commercialize our product candidates, if approved. In addition to continuing pressure on prices and cost containment
measures, legislative developments at the UK or the EU or member state level may result in significant additional
requirements or obstacles that may increase our operating costs. The delivery of healthcare in the UK and the EU,
including the establishment and operation of health services and the pricing and reimbursement of medicines, is almost
exclusively a matter for national law and policy. National governments and health service providers have different
priorities and approaches to the delivery of health care and the pricing and reimbursement of products in that context. In
general, however, the healthcare budgetary constraints in the UK and in most EU member states have resulted in
restrictions on the pricing and reimbursement of medicines by relevant health service providers. Coupled with ever-
increasing national regulatory burdens on those wishing to develop and market products, this could prevent or delay
marketing approval of our product candidates, restrict or regulate post-approval activities and affect our ability to
commercialize our product candidates, if approved.

In markets outside of the United States, the UK and the EU, reimbursement and healthcare payment systems vary

significantly by country, and many countries have instituted price ceilings on specific products and therapies.

We cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation

or administrative action in the United States, the UK the EU or any other jurisdiction. If we or any third parties we may
engage are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or
if we or such third parties are not able to maintain regulatory compliance, our product candidates may lose any regulatory
approval that may have been obtained and we may not achieve or sustain profitability.

Our business operations and current and future relationships with investigators, healthcare professionals, consultants,
third-party payors, patient organizations and customers will be subject to applicable healthcare regulatory laws, which
could expose us to penalties.

Our business operations and current and future arrangements with investigators, healthcare professionals,
consultants, third-party payors, patient organizations and customers, may expose us to broadly applicable fraud and abuse
and other healthcare laws and regulations. These laws may constrain the business or financial arrangements and
relationships through which we conduct our operations, including how we research, market, sell and distribute our product
candidates, if approved. Such laws include:

● the U.S. federal Anti-Kickback Statute, which prohibits, among other things, persons or entities from
knowingly and willfully soliciting, offering, receiving or providing any remuneration (including any
kickback, bribe, or certain rebate), directly or indirectly, overtly or covertly, in cash or in kind, to induce or
reward, or in return for, either the referral of an individual for, or the purchase, lease, order or
recommendation of, any good, facility, item or service, for which payment may be made, in whole or in part,
under U.S. federal and state healthcare programs such as Medicare and Medicaid. A person or entity does not
need to have actual knowledge of the statute or specific intent to violate it in order to have committed a
violation;

● the U.S. federal civil and criminal false claims and civil monetary penalties laws, including the civil False
Claims Act, which prohibit, among other things,, including through civil whistleblower or qui tam actions,

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individuals or entities from knowingly presenting, or causing to be presented, to the U.S. federal government,
claims for payment or approval that are false or fraudulent, knowingly making, using or causing to be made
or used, a false record or statement material to a false or fraudulent claim, or from knowingly making a false
statement to avoid, decrease or conceal an obligation to pay money to the U.S. federal government. In
addition, the government may assert that a claim including items and services resulting from a violation of
the U.S. federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the False
Claims Act;

● the U.S. federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, which created

additional federal criminal statutes which prohibit, among other things, knowingly and willfully executing, or
attempting to execute, a scheme to defraud any healthcare benefit program, or knowingly and willfully
falsifying, concealing or covering up a material fact or making any materially false statement, in connection
with the delivery of, or payment for, healthcare benefits, items or services. Similar to the U.S. federal Anti-
Kickback Statute, a person or entity does not need to have actual knowledge of the statute or specific intent
to violate it in order to have committed a violation;

● the FDCA, which prohibits, among other things, the adulteration or misbranding of drugs, biologics and

medical devices;

● the U.S. Public Health Service Act, which prohibits, among other things, the introduction into interstate

commerce of a biological product unless a biologics license is in effect for that product;

● federal consumer protection and unfair competition laws, which broadly regulate marketplace activities and

activities that potentially harm consumers;

● the U.S. Physician Payments Sunshine Act and its implementing regulations, which requires certain 

manufacturers of drugs, devices, biologics and medical supplies that are reimbursable under Medicare, 
Medicaid, or the Children’s Health Insurance Program, with specific exceptions, to report annually to the 
government information related to certain payments and other transfers of value to physicians (defined to 
include doctors, dentists, optometrists, podiatrists and chiropractors), certain health care professionals 
(beginning in 2022),  and teaching hospitals, as well as ownership and investment interests held by 
physicians and their immediate family members;

● analogous U.S. state laws and regulations, including: state anti-kickback and false claims laws, which may
apply to our business practices, including but not limited to, research, distribution, sales and marketing
arrangements and claims involving healthcare items or services reimbursed by any third-party payor,
including private insurers; state laws that require pharmaceutical companies to comply with the
pharmaceutical industry’s voluntary compliance guidelines and the relevant compliance guidance
promulgated by the U.S. federal government, or otherwise restrict payments that may be made to healthcare
providers and other potential referral sources; state laws and regulations that require drug manufacturers to
file reports relating to pricing and marketing information, which requires tracking gifts and other
remuneration and items of value provided to healthcare professionals and entities; and state and local laws
that require the registration of pharmaceutical sales representatives; and

● similar healthcare laws and regulations in the UK, EU and other jurisdictions, including reporting

requirements detailing interactions with and payments to healthcare providers.

Ensuring that our internal operations and future business arrangements with third parties comply with applicable

healthcare laws and regulations will involve substantial costs. It is possible that governmental authorities will conclude that
our business practices do not comply with current or future statutes, regulations, agency guidance or case

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law involving applicable fraud and abuse or other healthcare laws and regulations. If our operations are found to be in
violation of any of the laws described above or any other governmental laws and regulations that may apply to us, we may
be subject to significant penalties, including civil, criminal and administrative penalties, damages, fines, exclusion from
government-funded healthcare programs, such as Medicare and Medicaid or similar programs in other countries or
jurisdictions, integrity oversight and reporting obligations to resolve allegations of non-compliance, disgorgement,
individual imprisonment, contractual damages, reputational harm, diminished profits and the curtailment or restructuring of
our operations. If any of the physicians or other providers or entities with whom we expect to do business are found to not
be in compliance with applicable laws, they may be subject to criminal, civil or administrative sanctions, including
exclusions from government funded healthcare programs and imprisonment, which could affect our ability to operate our
business. Further, defending against any such actions can be costly, time-consuming and may require significant personnel
resources. Therefore, even if we are successful in defending against any such actions that may be brought against us, our
business may be impaired.

We are subject to government regulation and other legal obligations relating to privacy and data protection. Compliance
with these requirements is complex and costly. Failure to comply could materially harm our business.

The global data protection landscape is rapidly evolving, and we are or may become subject to numerous state,
federal and foreign laws, requirements and regulations governing the collection, use, disclosure, retention and security of
personal information, including HIPAA, the EU’s General Data Protection Regulation, or GDPR, and UK data privacy law.

In the U.S., HIPAA imposes privacy, security and breach reporting obligations with respect to individually

identifiable health information upon “covered entities” (health plans, health care clearinghouses and certain health care
providers), and their respective business associates, individuals or entities that create, receive, maintain or transmit
protected health information in connection with providing a service for or on behalf of a covered entity. HIPAA mandates
the reporting of certain breaches of health information to HHS, affected individuals and if the breach is large enough, the
media. Entities that are found to be in violation of HIPAA as the result of a breach of unsecured protected health
information, a complaint about privacy practices or an audit by HHS, may be subject to significant civil, criminal and
administrative fines and penalties and/or additional reporting and oversight obligations if required to enter into a resolution
agreement and corrective action plan with HHS to settle allegations of HIPAA non-compliance. Even when HIPAA does
not apply, according to the Federal Trade Commission or the FTC, failing to take appropriate steps to keep consumers’
personal information secure constitutes unfair acts or practices in or affecting commerce in violation of Section 5(a) of the
Federal Trade Commission Act. The FTC expects a company’s data security measures to be reasonable and appropriate in
light of the sensitivity and volume of consumer information it holds, the size and complexity of its business, and the cost of
available tools to improve security and reduce vulnerabilities.

In addition, certain state laws govern the privacy and security of health information in certain circumstances, some

of which are more stringent than HIPAA and many of which differ from each other in significant ways and may not have
the same effect, thus complicating compliance efforts. Failure to comply with these laws, where applicable, can result in
the imposition of significant civil and/or criminal penalties and private litigation. For example, the California Consumer
Privacy Act, or CCPA, which went into effect on January 1, 2020, creates new individual privacy rights for consumers (as
that word is broadly defined in the law) and places increased privacy and security obligations on entities handling personal
data of consumers or households. The CCPA provides for civil penalties for violations, as well as a private right of action
for data breaches that is expected to increase data breach litigation. Further, the California Privacy Rights Act, or the
CPRA, recently passed in California. The CPRA will impose additional data protection obligations on covered businesses,
including additional consumer rights processes, limitations on data uses, new audit requirements for higher risk data, and
opt outs for certain uses of sensitive data. It will also create a new California data protection agency authorized to issue
substantive regulations and could result in increased privacy and information security enforcement. The majority of the
provisions will go into effect on January 1, 2023, and additional compliance investment and potential business process
changes may be required. The CCPA, the CPRA or other domestic privacy and data protection laws and regulations may
increase our compliance costs and potential liability.

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The GDPR applies to any company established in the EU as well as any company outside the EU that processes

personal data in connection with the offering of goods or services to individuals in the EU or the monitoring of their
behavior (including in the context of clinical trials). The GDPR imposes many requirements for controllers and processors
of personal data, including, for example, higher standards for obtaining consent from individuals if this is required to
process their personal data, more robust disclosures to individuals and a strengthened individual data rights regime,
shortened timelines for data breach notifications, limitations on retention and secondary use of personal data, increased
requirements pertaining to health data and pseudonymised (i.e., key-coded) data and additional obligations when we
contract third-party processors in connection with the processing of personal data. The GDPR allows EU member states to
make additional laws and regulations further regulating the processing of genetic, biometric or health data. Failure to
comply with the requirements of GDPR and the applicable national data protection laws of the EU member states may
result in fines of up to €20,000,000 or up to 4% of the total worldwide annual turnover of the preceding financial year,
whichever is higher, and other administrative penalties and may expose us to compensation claims from affected
individuals.

From January 1, 2021, we are subject to the GDPR and also the UK GDPR, which, together with the amended UK

Data Protection Act 2018, retains the GDPR in UK national law. The UK GDPR mirrors the fines under the GDPR, e.g.
fines up to the greater of €20 million (£17.5 million) or 4% of global turnover. The relationship between the UK and the
EU in relation to certain aspects of data protection law remains unclear, and it is unclear how UK data protection laws and
regulations will develop in the medium to longer term, and how data transfers to and from the UK will be regulated in the
long term. These changes will lead to additional costs and increase our overall risk exposure. Currently there is a four to
six-month grace period agreed in the EU and UK Trade and Cooperation Agreement, ending June 30, 2021 at the latest,
whilst the parties discuss an adequacy decision. The European Commission published a draft adequacy decision on
February 19, 2021. If adopted, the decision will enable data transfers from EU member states to the UK for a four-year
period, subject to subsequent extensions.

Recent legal developments in Europe have created complexity and uncertainty regarding transfers of personal data

from the EEA and the UK to the U.S. Most recently, on July 16, 2020, the CJEU invalidated the EU-US Privacy Shield
Framework, or Privacy Shield, under which personal data could be transferred from the EEA to US entities who had self-
certified under the Privacy Shield scheme. While the CJEU upheld the adequacy of the standard contractual clauses (a
standard form of contract approved by the European Commission as an adequate personal data transfer mechanism, and
potential alternative to the Privacy Shield), it made clear that reliance on them alone may not necessarily be sufficient in all
circumstances. Use of the standard contractual clauses must now be assessed on a case-by-case basis taking into account
the legal regime applicable in the destination country, in particular applicable surveillance laws and rights of individuals
and additional measures and/or contractual provisions may need to be put in place, however, the nature of these additional
measures is currently uncertain. The CJEU went on to state that if a competent supervisory authority believes that the
standard contractual clauses cannot be complied with in the destination country and the required level of protection cannot
be secured by other means, such supervisory authority is under an obligation to suspend or prohibit that transfer.

These recent developments may require us to review and amend the legal mechanisms by which we make and/or 

receive personal data transfers to or from the U.S.  As supervisory authorities issue further guidance on personal data 
export mechanisms, including circumstances where the standard contractual clauses cannot be used, and/or start taking 
enforcement action, we could suffer additional costs, complaints and/or regulatory investigations or fines, and/or if we are 
otherwise unable to transfer personal data between and among countries and regions in which we operate, it could affect 
the manner in which we provide our services, the geographical location or segregation of our relevant systems and 
operations, and could adversely affect our financial results.

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We are subject to environmental, health and safety laws and regulations, and we may become exposed to liability and
substantial expenses in connection with environmental compliance or remediation activities.

Our operations, including our development, testing and manufacturing activities, are subject to numerous
environmental, health and safety laws and regulations. These laws and regulations govern, among other things, the
controlled use, handling, release and disposal of and the maintenance of a registry for, hazardous materials and biological
materials, such as chemical solvents, human cells, carcinogenic compounds, mutagenic compounds and compounds that
have a toxic effect on reproduction, laboratory procedures and exposure to blood-borne pathogens. If we fail to comply
with such laws and regulations, we could be subject to fines or other sanctions.

As with other companies engaged in activities similar to ours, we face a risk of environmental liability inherent in

our current and historical activities, including liability relating to releases of or exposure to hazardous or biological
materials. Environmental, health and safety laws and regulations are becoming more stringent. We may be required to incur
substantial expenses in connection with future environmental compliance or remediation activities, in which case, the
production efforts of our third-party manufacturers or our development efforts may be interrupted or delayed.

Due to our international operations, we are subject to anti-corruption laws, as well as export control laws, customs laws,
sanctions laws and other laws governing our operations. If we fail to comply with these laws, we could be subject to civil
or criminal penalties, other remedial measures and legal expenses.

Our operations are subject to anti-corruption laws, including the UK Bribery Act 2010, or Bribery Act; the U.S.
Foreign Corrupt Practices Act, or FCPA; and other anti-corruption laws that apply in countries where we do business and
may do business in the future. The Bribery Act, FCPA, and these other laws generally prohibit us, our officers and our
employees and intermediaries from bribing, being bribed by, or providing prohibited payments or anything else of value to
government officials or other persons to obtain or retain business or gain some other business advantage. We may in the
future operate in jurisdictions that pose a high risk of potential Bribery Act or FCPA violations, and we may participate in
collaborations and relationships with third parties whose actions could potentially subject us to liability under the Bribery
Act, FCPA, or local anti-corruption laws. In addition, we cannot predict the nature, scope, or effect of future regulatory
requirements to which any of our international operations might be subject or the manner in which existing laws might be
administered or interpreted.

We also are subject to other laws and regulations governing any international operations, including regulations
administered by the governments of the UK and the U.S., and authorities in the EU, including applicable export control
regulations, economic sanctions on countries and persons, customs requirements and currency exchange regulations, or,
collectively, the Trade Control laws.

There is no assurance that we will be completely effective in ensuring our compliance with all applicable anti-

corruption laws, including the Bribery Act, the FCPA, or other legal requirements, including Trade Control laws. If we are
not in compliance with the Bribery Act, the FCPA, and other anti-corruption laws or Trade Control laws, we may be
subject to criminal and civil penalties, disgorgement, and other sanctions and remedial measures and legal expenses. Any
investigation of any potential violations of the Bribery Act, the FCPA, other anti-corruption laws, or Trade Control laws by
UK, U.S., or other authorities, even if it is ultimately determined that we did not violate such laws, could be costly and
time-consuming, require significant personnel resources, and harm our reputation.

We have established internal controls to detect and prevent violations of applicable anti-corruption laws and to

remedy any weaknesses identified. There can be no assurance, however, that the policies and procedures will be followed
at all times or effectively detect and prevent violations of the applicable laws by one or more of our employees,
consultants, agents, or collaborators and, as a result, we could be subject to fines, penalties, or prosecution.

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Risks Related to Commercialization

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

The development and commercialization of new gene therapy products is highly competitive. Moreover, the gene

regulation and manufacturing fields are characterized by rapidly changing technologies and a strong emphasis on
intellectual property. We may face competition with respect to any product candidates that we may seek to develop or
commercialize in the future from major pharmaceutical companies, specialty pharmaceutical companies, and
biotechnology companies worldwide. Potential competitors also include academic institutions, government agencies, and
other public and private research organizations that conduct research, seek patent protection, and establish collaborative
arrangements for research, development, manufacturing, and commercialization.

There are a number of large pharmaceutical and biotechnology companies that currently market and sell products

or are pursuing the development of products for the treatment of the disease indications for which we have research
programs, including inherited retinal diseases and neurodegenerative diseases. Some of these competitive products and
therapies are based on scientific approaches that are similar to our approach, and others are based on entirely different
approaches.

Our platform and products focus on the development of gene therapies and gene regulation technology. In 2017,

the FDA approved the first gene treatment for RPE65-associated retinal disease, Luxturna, a commercially available
product developed by Spark Therapeutics, Inc., which was purchased by Roche. There are a number of other companies
developing ocular gene therapy products, including Applied Genetic Technologies Corporation, Biogen, Inc. and 4D
Molecular Therapeutics, Inc. There are a number of companies developing gene therapy products for neurodegenerative
diseases, including Voyager Therapeutics, Inc., Brain Neurotherapy Bio, Inc., Axovant Gene Therapies Ltd. and Prevail
Therapeutics Inc. In addition to competition from other gene therapies, any products we may develop may also face
competition from other types of therapies, such as small molecule, antibody, or protein therapies. Many of our current or
potential competitors, either alone or with their collaboration partners, have greater financial resources and expertise in
research and development, manufacturing, preclinical testing, conducting clinical trials, obtaining regulatory approvals,
and marketing approved products than we do. Mergers and acquisitions in the pharmaceutical, biotechnology, and gene
therapy 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 patient enrollment in clinical trials, as well as in acquiring technologies complementary
to, or necessary for, our programs. 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, limiting demand or the price we are able to charge, or that could
render any products that we may develop obsolete or non-competitive. Our competitors also may obtain FDA, MHRA,
EMA or other regulatory approval for their products 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. 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/or
scope of patents relating to our competitors’ products.

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The successful commercialization of our product candidates will depend in part on the extent to which governmental
authorities and health insurers establish coverage, adequate reimbursement levels and pricing policies. Failure to
obtain or maintain coverage and adequate reimbursement for our product candidates, if approved, could limit our
ability to market those products and decrease our ability to generate revenue.

The availability of coverage and adequacy of reimbursement by governmental healthcare programs such as

Medicare and Medicaid, private health insurers and other third-party payors are essential for most patients to be able to
afford medical services and pharmaceutical products such as our product candidates, assuming FDA approval. Our ability
to achieve acceptable levels of coverage and reimbursement for our products or procedures using our products by
governmental authorities, private health insurers and other organizations will have an effect on our ability to successfully
commercialize our product candidates. Obtaining coverage and adequate reimbursement for our products may be
particularly difficult because of the higher prices often associated with drugs administered under the supervision of a
physician. Separate reimbursement for the product itself or the treatment or procedure in which our product is used may not
be available. A decision by a third-party payor not to cover or separately reimburse for our products or procedures using
our products, could reduce physician utilization of our products if approved. Assuming there is such coverage by a third-
party payor, the resulting reimbursement payment rates may not be adequate or may require co-payments that patients find
unacceptably high. We cannot be sure that coverage and reimbursement in the United States, the UK, the EU or elsewhere
will be available for our product candidates or any product that we may develop, and any reimbursement that may become
available may not be adequate or may be decreased or eliminated in the future.

Third-party payors increasingly are challenging prices charged for pharmaceutical products and services, and
many third-party payors may refuse to provide coverage and reimbursement for particular drugs or biologics when an
equivalent generic drug, biosimilar or a less expensive therapy is available. It is possible that a third-party payor may
consider our product candidates as substitutable and only offer to reimburse patients for the less expensive product. Even if
we show improved efficacy or improved convenience of administration with our product candidates, pricing of existing
third-party therapeutics may limit the amount we will be able to charge for our product candidates. These payors may deny
or revoke the reimbursement status of a given product or establish prices for new or existing marketed products at levels
that are too low to enable us to realize an appropriate return on our investment in our product candidates. If reimbursement
is not available or is available only at limited levels, we may not be able to successfully commercialize our product
candidates and may not be able to obtain a satisfactory financial return on our product candidates.

There is significant uncertainty related to the insurance coverage and reimbursement of newly-approved products.

In the United States, third-party payors, including private and governmental 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. The
Medicare and Medicaid programs increasingly are used as models in the United States for how private payors and other
governmental payors develop their coverage and reimbursement policies for drugs and biologics. Some third-party payors
may require pre-approval of coverage for new or innovative devices or drug therapies before they will reimburse healthcare
providers who use such therapies. We cannot predict at this time what third-party payors will decide with respect to the
coverage and reimbursement for our product candidates.

No uniform policy for coverage and reimbursement for products exists among third-party payors in the United
States. Therefore, coverage and reimbursement for products can differ significantly from payor to payor. As a result, the
coverage determination process is often a time-consuming and costly process that will require us to provide scientific and
clinical support for the use of our product candidates to each payor separately, with no assurance that coverage and
adequate reimbursement will be applied consistently or obtained in the first instance. Furthermore, rules and regulations
regarding reimbursement change frequently, in some cases on short notice.

Outside the United States, international operations are generally subject to extensive governmental price controls
and other market regulations, and we believe the increasing emphasis on cost-containment initiatives in Europe and other
countries have and will continue to put pressure on the pricing and usage of our product candidates. In many

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countries, the prices of medical products are subject to varying price control mechanisms as part of national health systems.
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 product
candidates may be reduced compared with the United States and may be insufficient to generate commercially-reasonable
revenue and profits.

Moreover, increasing efforts by governmental 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 newly
approved products and, as a result, they may not cover or provide adequate payment for our product candidates. We expect
to experience pricing pressures in connection with the sale of our product candidates due to the trend toward managed
health care, the increasing influence of health maintenance organizations and additional legislative changes. The downward
pressure on healthcare costs in general, particularly prescription drugs and biologics and surgical procedures and other
treatments, has become intense. As a result, increasingly high barriers are being erected to the entry of new products.

Even if our product candidates receive marketing approval, they may fail to achieve market acceptance by physicians,
patients, third-party payors or others in the medical community necessary for commercial success.

If our product candidates receive marketing approval, they may nonetheless fail to gain sufficient market

acceptance by physicians, patients, third-party payors and others in the medical community. If they do not achieve an
adequate level of acceptance, we may not generate significant product revenues or become profitable. The degree of market
acceptance of our product candidates, if approved for commercial sale, will depend on a number of factors, including but
not limited to:

● the efficacy and potential advantages compared to alternative treatments;

● effectiveness of sales and marketing efforts;

● the cost of treatment in relation to alternative treatments, including any similar generic treatments;

● our ability to offer our product candidates for sale at competitive prices;

● the convenience and ease of administration;

● the willingness of the target patient population to try new therapies and of physicians to prescribe these

therapies;

● the strength of marketing and distribution support, and publicity concerning our products or competing

products and treatments;

● the timing of market introduction of competitive products;

● the availability of third-party coverage and adequate reimbursement;

● product labeling or product insert requirements of the FDA, MHRA, EMA or other regulatory authorities,

including any limitations or warnings contained in a product’s approved labeling;

● the prevalence and severity of any side effects; and

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● any restrictions on the use of our product together with other medications.

Because we expect sales of our product candidates, if approved, to generate substantially all of our product
revenues for a substantial period, the failure of these product candidates to find market acceptance would harm our
business and could require us to seek additional financing.

If we are unable to establish sales, marketing and distribution capabilities either on our own or in collaboration with
third parties, we may not be successful in commercializing our product candidates or realizing the synergies in the
target indications of our programs, even if they are approved.

We do not have any infrastructure for the sales, marketing or distribution of our products, and the cost of 
establishing and maintaining such an organization may exceed the cost-effectiveness of doing so or we may seek 
collaborative arrangements or external funding to commercialize our product candidates. For example, Janssen will be 
solely responsible for the commercialization of AAV-RPGR, AAV-CNGB3 and AAV-CNGA3 pursuant to our 
Collaboration Agreement with them.  There are significant expenses and risks involved with establishing our own sales, 
marketing and distribution capabilities, including our ability to hire, retain and appropriately incentivize qualified 
individuals, generate sufficient sales leads, provide adequate training to sales and marketing personnel, and effectively 
manage a geographically dispersed sales and marketing team. Any failure or delay in the development of such capabilities 
could delay any product launch, which would adversely impact the commercialization of our product candidates. 
Additionally, if any commercial launch is delayed or does not occur for any reason, we would have prematurely or 
unnecessarily incurred these commercialization expenses. This may be costly, and our investment would be lost if we 
cannot retain or reposition our sales and marketing personnel.

We may not have the resources in the foreseeable future to allocate to the sales and marketing of our product

candidates in certain markets. Therefore, our future sales in these markets will largely depend on our ability to enter into
and maintain collaborative relationships for such capabilities, the collaborator’s strategic interest in the product and such
collaborator’s ability to successfully market and sell the product. We may pursue collaborative arrangements regarding the
sale and marketing of AAV-GAD, AAV-RPE65, AAV-AQP1 or other future gene therapy programs, if approved, for the
United States and/or certain markets overseas; however, there can be no assurance that we will be able to establish or
maintain such collaborative arrangements, or if able to do so, that they will have effective sales forces.

If we are unable to build our own sales force or negotiate or maintain a collaborative relationship for the
commercialization of our product candidates, we may be forced to delay potential commercialization or reduce the scope of
our sales or marketing activities. If we elect to increase our expenditures to fund commercialization activities
internationally, we will need to obtain additional capital, which may not be available to us on acceptable terms, or at all.
We could enter into arrangements with collaborative partners at an earlier stage than otherwise would be ideal and we may
be required to relinquish rights or otherwise agree to terms unfavorable to us, any of which may have an adverse effect on
our business, operating results and prospects.

Some indications targeted by our ophthalmology programs are rare, but we anticipate realizing synergies in

commercializing of our IRD product candidates, should they be approved. Failure to realize synergies in our sales,
marketing and distribution efforts may harm our commercialization efforts.

If we or our collaborators are unable to establish or maintain adequate sales, marketing and distribution
capabilities, we will not be successful in commercializing our product candidates and may not become profitable and may
incur significant additional losses. We will be competing with many companies that currently have extensive and well-
funded marketing and sales operations. 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.

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If any of our products are commercialized outside of the United States, the UK or the EU, a variety of risks associated
with international operations could adversely affect our business.

If any of our products are approved for commercialization, we have entered into, and intend to enter into,
agreements with third parties to market them in certain jurisdictions outside the United States, the UK and the EU, such as
under our Collaboration Agreement with Janssen. We expect that we and our third-party collaborators will be subject to
additional risks related to international pharmaceutical operations, including:

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different  regulatory  requirements  for  drug  and  biologic  approvals  and  rules  governing  drug  and  biologic
commercialization in foreign countries;

tighter restrictions on privacy and the collection and use of patient data;

reduced or loss of protection for intellectual property rights;

foreign reimbursement, pricing and insurance regimes;

unexpected changes in tariffs, trade barriers and regulatory requirements;

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

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

business interruptions resulting from geopolitical actions, including war and terrorism, or widespread health
emergency, such as the COVID-19 pandemic, or natural disasters including earthquakes, typhoons, floods and
fires, or from economic or political instability;

greater difficulty with enforcing our contracts;

potential noncompliance with the FCPA, the Bribery Act and similar anti-bribery and anticorruption laws in
other jurisdictions;

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

workforce  uncertainty  in  countries  where  labor  unrest  is  more  common  than  in  the  United  States  and
compliance with tax, employment, immigration and labor laws for employees living or traveling abroad.  

We have no prior experience in these areas and we may rely on other third parties to help us establish our

international commercialization operations. In addition, there are complex regulatory, tax, labor and other legal
requirements imposed by individual countries in Europe with which we and our third-party collaborators will need to
comply. If we are unable to successfully manage the challenges of international expansion and operations, our business and
operating results could be harmed.

Any product candidates for which we intend to seek approval as biologic products may face competition sooner than
anticipated.

The ACA includes a subtitle called the Biologics Price Competition and Innovation Act of 2009, or BPCIA,

which created an abbreviated approval pathway for biological products that are biosimilar to or interchangeable with an

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FDA-licensed reference biological product. Under the BPCIA, an application for a biosimilar product may not be
submitted to the FDA until four years following the date that the reference product was first licensed by the FDA. In
addition, the approval of a biosimilar product may not be made effective by the FDA until 12 years from the date on which
the reference product was first licensed by the FDA. During this 12-year period of exclusivity, another company may still
market a competing version of the reference product if the FDA approves a full BLA for the competing product containing
the sponsor’s own pre-clinical data and data from adequate and well-controlled clinical trials to demonstrate the safety,
purity and potency of the other company’s product. The law is complex and is still being interpreted and implemented by
the FDA. As a result, its ultimate impact, implementation, and meaning are subject to uncertainty.

We believe that any of our product candidates approved as a biological product under a BLA should qualify for 

the 12-year period of exclusivity.  However, there is a risk that any of our product candidates approved as a biological 
product under a BLA would not qualify for the 12-year period of exclusivity or that this exclusivity could be shortened due 
to congressional action or otherwise, or that the FDA will not consider our product candidates to be reference products for 
competing products, potentially creating the opportunity for generic competition sooner than anticipated. Other aspects of 
the BPCIA, some of which may impact the BPCIA exclusivity provisions, have also been the subject of recent litigation. 
Moreover, the extent to which a biosimilar, once licensed, will be substituted for any one of our reference products in a 
way that is similar to traditional generic substitution for non-biological products is not yet clear, and will depend on a 
number of marketplace and regulatory factors that are still developing.

If competitors are able to obtain marketing approval for biosimilars referencing our products, our products may

become subject to competition from such biosimilars, with the attendant competitive pressure and consequences.

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Risks Related to Our Dependence on Third Parties

If our cGMP manufacturing facilities are unable to supply our product candidates for all of our current preclinical,
clinical and potential commercial needs, we will be forced to seek out third-party manufacturers. We currently contract
with third parties for the manufacture of plasmid used in producing our product candidates. Relying on third parties
increases the risk that we will not have sufficient quantities of such materials, product candidates, or any medicines that
we may develop and commercialize, or that such supply will not be available to us at an acceptable cost, which could
delay, prevent, or impair our development or commercialization efforts.

We produce our product candidates in our cGMP viral vector manufacturing facility completed in early 2018 and

we completed the acquisition of our second cGMP viral vector manufacturing facility and our first cGMP plasmid and
DNA production facility in Shannon, Ireland in January 2021 to expand our manufacturing and supply chain capabilities.
However, if our current facility is damaged, suffers any form of delay or regulatory challenges, we experience slowdowns
or problems with the development and startup of our new facilities or we are unable to scale our internal manufacturing
capabilities to meet demand for our product candidates, we will need to contract with third-party manufacturers to produce
our product candidates. While we expect to begin our own plasmid manufacturing capabilities in our Shannon, Ireland
facilities during 2021, we currently rely on third-party manufacturers for the manufacture of plasmid used in the production
of our product candidates. We do not have a long-term supply agreement with any of the third-party manufacturers, and we
purchase our required supply on a purchase order basis.

We and our third-party manufacturers may also encounter difficulties or delays in manufacturing of our product

candidates or the plasmid used in the production of our product candidates. Geopolitical actions, natural disaster or a
widespread health emergency, such as the COVID-19 pandemic , could impact our supply chain. To the extent that we or
our third-party manufacturers are located in geographies affected by these matters, it may result in the temporary closing of
manufacturing facilities and may increase the costs associated with manufacturing our product candidates.

We may be unable to establish any agreements with third-party manufacturers or to do so on acceptable terms.
Even if we are able to establish agreements with third-party manufacturers, reliance on third-party manufacturers entails
additional risks, including:

● the possible breach of the manufacturing agreement by the third party, including failure to provide

appropriate quantities in a timely manner;

● the possible termination or nonrenewal of the agreement by the third party at a time that is costly or

inconvenient for us; and

● reliance on the third party for regulatory compliance, quality assurance, safety, and pharmacovigilance and

related reporting.

Third-party manufacturers may not be able to comply with cGMP regulations or similar regulatory requirements

that might be required by the FDA or EMA. Our failure, or the failure of our third-party manufacturers, to comply with
applicable regulations could result in sanctions being imposed on us, including fines, injunctions, civil penalties, delays,
suspension or withdrawal of approvals, license revocations, seizures or recalls of product candidates or medicines,
operating restrictions, and criminal prosecutions, any of which could adversely affect supplies of our candidates and harm
our business, financial condition, results of operations, and prospects.

Any therapies that we may develop may compete with other product candidates and products for access to
manufacturing facilities. There are a limited number of manufacturers that operate under cGMP regulations and that

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might be capable of manufacturing for us. Any performance failure on the part of our existing or future manufacturers
could delay clinical development or marketing approval.

Our current and anticipated future dependence upon others for the manufacture of any product candidates we may

develop or any components required for the manufacture of our product candidates may adversely affect our future profit
margins and our ability to commercialize any product candidates that receive marketing approval on a timely and
competitive basis.

We have in the past, and may in the future, collaborate with third parties for the development, manufacture and
commercialization of our product candidates. We may not succeed in establishing and maintaining collaborative
relationships, which may significantly limit our ability to develop and commercialize our product candidates
successfully, if at all.

We have entered into collaboration agreements with third parties for the development and commercialization of 
our product candidates, including our Collaboration Agreement with Janssen for the development and commercialization 
of AAV-CNGB3, AAV-CNGA3 and AAV-RPGR. We have also entered into a manufacturing research collaboration 
agreement with Janssen to further develop processes for manufacturing AAV viral vectors.  We may seek additional 
collaborative relationships in the future. Failure to obtain a collaborative relationship for our product candidates may 
significantly impair their commercial potential. We also may need to enter into collaborative relationships to provide 
funding to support our other research and development programs. The process of establishing and maintaining 
collaborative relationships is difficult, time-consuming and involves significant uncertainty, such as:

● a collaboration partner may shift its priorities and resources away from our product candidates due to a

change in business strategies, or a merger, acquisition, sale or downsizing;

● a collaboration partner may seek to renegotiate or terminate their relationships with us due to unsatisfactory
clinical results, manufacturing issues, a change in business strategy, a change of control or other reasons;

● a collaboration partner may cease development in therapeutic areas which are the subject of our strategic

collaboration;

● a collaboration partner may not devote sufficient capital or resources towards our product candidates;

● a collaboration partner may change the success criteria for a product candidate thereby delaying or ceasing

development of such candidate;

● a significant delay in initiation of certain development activities by a collaboration partner will also delay
payment of milestones tied to such activities, thereby impacting our ability to fund our own activities;

● a collaboration partner could develop a product that competes, either directly or indirectly, with our product

candidate;

● a collaboration partner with commercialization obligations may not commit sufficient financial or human

resources to the marketing, distribution or sale of a product;

● a collaboration partner with manufacturing responsibilities may encounter regulatory, resource or quality

issues and be unable to meet demand requirements;

● a collaboration partner may terminate a strategic alliance;

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● a dispute may arise between us and a partner concerning the research, development or commercialization of a
product candidate resulting in a delay in milestones, royalty payments or termination of an alliance and
possibly resulting in costly litigation or arbitration which may divert management attention and resources;
and

● a partner may use our products or technology in such a way as to make us subject to litigation with a third

party.

If any collaborator fails to fulfill its responsibilities in a timely manner, or at all, our research, clinical

development, manufacturing or commercialization efforts related to that collaboration could be delayed or terminated, or it
may be necessary for us to assume responsibility for expenses or activities that would otherwise have been the
responsibility of our collaborator. If we are unable to establish and maintain collaborative relationships on acceptable terms
or to successfully transition terminated collaborative agreements, we may have to delay or discontinue further development
of one or more of our product candidates, undertake development and commercialization activities at our own expense or
find alternative sources of capital.

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

We expect to rely on CROs, clinical trial sites, and other vendors to ensure our preclinical studies and clinical

trials are conducted properly and on time. We may also engage third parties such as clinical data management
organizations, medical institutions and clinical investigators to conduct or assist in our clinical trials or other preclinical
and clinical research and development work. 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 third-party service providers’
activities. Nevertheless, we will be responsible for ensuring that each of our preclinical studies and clinical trials is
conducted in accordance with the applicable protocol, legal, quality, regulatory and scientific standards. Our reliance on
these third parties does not relieve us of our regulatory responsibilities. For example, we expect to conduct the Phase 3
Lumeos clinical trial of AAV-RPGR for the treatment of patients with XLRP caused by mutations in the RPGR gene at
multiple clinical trial sites in North America and Europe. If any locations terminate the clinical trial, 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. If we elect to internalize some
or all activities related to the conduct of our preclinical studies or clinical trials that are currently performed by our third-
party service providers, or if we are required to do so due to a service provider’s termination of our relationship, then we
may be required to source additional technology and personnel in order to perform the relevant activities. We may be
unsuccessful in our efforts to internalize some or all relevant activities, either on the desired timeline or at all.

Our third-party service providers are not our employees, and we are therefore unable to directly monitor whether
or not they devote sufficient time, attention, expertise and resources to our clinical and nonclinical programs. These third-
party service providers 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 third-party service providers do not successfully carry out their contractual duties or obligations or fail to meet
expected deadlines, including as a result of the impact of the COVID-19 pandemic, or if the quality or accuracy of the
preclinical or 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 preclinical studies or 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 could be harmed, our costs could increase,
and our ability to generate revenues could be delayed.

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If our relationship with any CROs terminate, we may not be able to enter into arrangements with alternative CROs

or do so on commercially reasonable terms. Switching or adding additional CROs involves substantial cost and requires
management time and focus. In addition, there is a natural transition period when a new CRO commences work. As a
result, delays occur, which can materially impact our ability to meet our desired clinical development timelines. Though we
intend to carefully manage our relationships with our CROs, there can be no assurance that we will not encounter
challenges or delays in the future or that these delays or challenges will not have an adverse impact on our business,
financial condition and prospects.

Risks Related to Intellectual Property

We depend on proprietary technology licensed from others. If we lose our existing licenses or are unable to acquire or
license additional proprietary rights from third parties, we may not be able to continue developing our product
candidates.

We currently in-license certain intellectual property from research institutions, universities and other third parties.

We may also enter into additional agreements, including license agreements, with other parties in the future that impose
diligence, development and commercialization timelines, milestone payments, royalties, insurance and other obligations on
us. If we fail to comply with our obligations to any of our current or future collaborators, our counterparties may have the
right to terminate these agreements, in which event we might not be able to develop, manufacture or market any product
candidate that is covered by these agreements, which could adversely affect the value of the product candidate being
developed under any such agreement. Termination of these agreements or reduction or elimination of our rights under these
agreements may result in our having to negotiate new or reinstated agreements with less favorable terms, or cause us to
lose our rights under these agreements, including our rights to important intellectual property or technology.

We may rely on other third parties from whom we license proprietary technology to file and prosecute patent
applications and maintain patents and otherwise protect the intellectual property we license from them. We may have
limited control over these activities or any other intellectual property that may be related to our in-licensed intellectual
property. For example, we cannot be certain that such activities by these licensors will be conducted in compliance with
applicable laws and regulations or will result in valid and enforceable patents and other intellectual property rights. We
may have limited control over the manner in which our licensors initiate an infringement proceeding against a third-party
infringer of the intellectual property rights, or defend certain of the intellectual property that may be licensed to us. It is
possible that the licensors’ infringement proceedings or defense activities may be less vigorous than if we conduct them
ourselves. The licensing and acquisition of third-party intellectual property rights is a competitive practice, and companies
that may be more established, or have greater resources than we do, may also be pursuing strategies to license or acquire
third-party intellectual property rights that we may consider necessary or attractive in order to commercialize our product
candidates. More established companies may have a competitive advantage over us due to their larger size and cash
resources or greater clinical development and commercialization capabilities. There can be no assurance that we will be
able to successfully complete such negotiations and ultimately acquire the rights to the intellectual property surrounding
the additional product candidates that we may seek to acquire. If we are unable to obtain and maintain patent protection for
our technology and product candidates or if the scope of the patent protection obtained is not sufficiently broad, we may
not be able to compete effectively in our markets.

If we are unable to obtain and maintain patent protection for our technology and product candidates or if the scope of
the patent protection obtained is not sufficiently broad, we may not be able to compete effectively in our markets.

We rely upon a combination of patents, trade secret protection and confidentiality agreements to protect the

intellectual property related to our proprietary technologies, product candidate development programs and product
candidates. Our success depends in part on our ability to secure and maintain patent protection in the United States and
other countries with respect to our current product candidates and any future product candidates we may develop. We seek
to protect our proprietary position by filing or collaborating with our licensors to file patent applications in the

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United States and abroad related to our proprietary technologies, development programs and product candidates. The
patent prosecution process is expensive and time-consuming, and we may not be able to file and prosecute all necessary or
desirable patent applications at a reasonable cost or in a timely manner. Moreover, the issuance, scope, validity,
enforceability and commercial value of our patent rights are uncertain.

It is also possible that we might fail to identify patentable aspects of our research and development output before it 
is too late to obtain patent protection. We may not have the right to control the preparation, filing, and prosecution of patent 
applications, or to maintain the rights to patents licensed to third parties. Therefore, these patents and patent applications 
may not be prosecuted and enforced in a manner consistent with the best interests of our business. The patent applications 
that we own or in-license may fail to result in issued patents with claims that cover our proprietary products and 
technology, including current product candidates, any future product candidates we may develop, and our gene regulation 
technology in the United States or in other countries, in whole or in part. Alternately, our existing patents and any future 
patents we obtain may not be sufficiently broad to prevent others from using our technology or from developing competing 
products and technologies. There is no assurance that all potentially relevant prior art relating to our patents and patent 
applications has been found, which can prevent a patent from issuing from a pending patent application or later invalidate 
or narrow the scope of an issued patent. For example, publications of discoveries in the scientific literature often lag behind 
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. Therefore, we cannot know with certainty whether we were the first to 
make the inventions claimed in our patents or pending patent applications, or that we were the first to file for patent 
protection of such inventions. In addition, obtaining and maintaining our patent protection depends on compliance with 
various procedural, document submission, fee payment and other requirements imposed by governmental patent agencies, 
and our patent protection could be reduced or eliminated for non-compliance with these requirements.  Even if patents do 
successfully issue and even if such patents cover our current product candidates, any future product candidates we may 
develop and our gene regulation technology, third parties may challenge their validity, enforceability or scope thereof, 
which may result in such patents being narrowed, invalidated, or held unenforceable. Any successful challenge to these 
patents or any other patents owned by or licensed to us could deprive us of rights necessary for the successful 
commercialization of any of our product candidates or gene regulation technology. Our competitors may be able to 
circumvent our patents by developing similar or alternative product candidates in a non-infringing manner. Further, if we 
encounter delays in regulatory approvals, the period of time during which we could market a product candidate and our 
gene regulation technology under patent protection could be reduced.

If the patent applications we hold or have in-licensed with respect to our development programs and product

candidates fail to issue, if their validity, breadth or strength of protection is threatened, or if they fail to provide meaningful
exclusivity for any of our current or future product candidates or technology, it could dissuade companies from
collaborating with us to develop product candidates, encourage competitors to develop competing products or technologies
and threaten our ability to commercialize future product candidates. Any such outcome could harm our business.

The patent position of biotechnology and pharmaceutical companies is uncertain, involves complex legal and

factual questions, and is characterized by the existence of large numbers of patents and frequent litigation based on
allegations of patent or other intellectual property infringement or violation. In addition, the laws of jurisdictions outside
the United States may not protect our rights to the same extent as the laws of the United States. 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.

The issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability, and our owned

and licensed 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 freedom to operate or in patent claims being narrowed, invalidated or held unenforceable, in
whole or in part, 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 products. Thus,

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even if our patent applications issue as patents, they may not issue in a form that will provide us with meaningful
protection, prevent competitors from competing with us or otherwise provide us with any competitive advantage.
Moreover, patents have a limited lifespan. In the United States, the natural expiration of a patent is generally 20 years after
it is filed. Various extensions may be available; however, the life of a patent, and the protection it affords, is limited.
Without patent protection for our current or future product candidates, we may be open to competition from generic
versions of such products. 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 owned and licensed patent portfolio may not provide us with sufficient rights to exclude
others from commercializing products similar or identical to ours.

Third parties may assert claims against us alleging infringement of their patents and proprietary rights, or we may need
to become involved in lawsuits to defend or enforce our patents, either of which could result in substantial costs or loss
of productivity, delay or prevent the development and commercialization of our product candidates, prohibit our use of
proprietary technology or sale of products or put our patents and other proprietary rights at risk.

Our commercial success depends, in part, upon our ability to develop, manufacture, market and sell our product

candidates without alleged or actual infringement, misappropriation or other violation of the patents and proprietary rights
of third parties. However, our research, development and commercialization activities may be subject to claims that we
infringe or otherwise violate patents or other intellectual property rights owned or controlled by third parties. Litigation
relating to infringement or misappropriation of patent and other intellectual property rights in the pharmaceutical and
biotechnology industries is common, including patent infringement lawsuits, interferences, oppositions and inter partes
reviews, and reexamination proceedings before the U.S. Patent and Trademark Office, or USPTO, and corresponding
foreign patent offices. In addition, many companies in intellectual property-dependent industries, including the
biotechnology and pharmaceutical industries, have employed intellectual property litigation as a means to gain an
advantage over their competitors. Numerous U.S., EU and foreign issued patents and pending patent applications, which
are owned by third parties, exist in the fields in which we are developing product candidates, and as the biotechnology and
pharmaceutical industries expand and more patents are issued, the risk increases that our product candidates may be subject
to claims of infringement of the intellectual property rights of third parties. Some claimants may have substantially greater
resources than we do and may be able to sustain the costs of complex intellectual property litigation to a greater degree and
for longer periods of time than we could. In addition, patent holding companies that focus solely on extracting royalties and
settlements by enforcing patent rights may target us.

We may be subject to third-party claims including infringement, interference or derivation proceedings, post-grant

review and inter parties review before the USPTO or similar adversarial proceedings or litigation in other jurisdictions.
Even if such claims are without merit, a court of competent jurisdiction could hold that these third-party patents are valid,
enforceable and infringed, and the holders of any such patents may be able to block our ability to commercialize the
applicable product candidate unless we obtained a license under the applicable patents, or until such patents expire or are
finally determined to be invalid or unenforceable. In addition, third parties may obtain patents in the future and claim that
use of our technologies infringes upon these patents, and the holders of any such patents may be able to prohibit our use of
those compositions, formulations, methods of treatment, prevention or use or other technologies, effectively blocking our
ability to develop and commercialize the applicable product candidate until such patent expires or is finally determined to
be invalid or unenforceable or unless we obtained a license.

In addition, defending such claims would cause us to incur substantial expenses and, if we are not successful in
defending such claims, it could cause us to pay substantial damages if we are found to be infringing a third party’s patent
rights. These damages potentially include increased damages (possibly treble damages) and attorneys’ fees if we are found
to have infringed such rights willfully. Further, if a patent infringement suit is brought against us or our third-party service
providers, our development, manufacturing or sales activities relating to the product or product candidate that is the subject
of the suit may be delayed or terminated. As a result of patent infringement claims, or in order to avoid potential
infringement claims, we may choose to seek, or be required to seek, a license from the third party, which may require
payment of substantial royalties or fees, or require us to grant a cross-license under our intellectual property

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rights. These licenses may not be available on reasonable terms or at all. Even if a license can be obtained on reasonable
terms, the rights may be nonexclusive, which would give our competitors access to the same intellectual property rights. If
we are unable to enter into a license on acceptable terms, we could be prevented from commercializing one or more of our
product candidates, or forced to modify such product candidates, or to cease some aspect of our business operations, which
could harm our business significantly. We might also be forced to redesign or modify our product candidates so that we no
longer infringe the third-party intellectual property rights, which may result in significant cost or delay to us, or which
redesign or modification could be impossible or technically infeasible. Even if we were ultimately to prevail, any of these
events could require us to divert substantial financial and management resources that we would otherwise be able to devote
to our business.

Competitors may infringe our patents or other intellectual property. If we or one of our licensors were to initiate

legal proceedings against a third party to enforce a patent covering one of our product candidates, the defendant could
counterclaim that our patent is invalid or unenforceable. If a defendant were to prevail on a legal assertion of invalidity or
unenforceability, we would lose at least part, and perhaps all, of the patent protection on our product candidates.

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, because of the substantial amount of discovery required in connection with intellectual
property litigation, there is a risk that some of our confidential information could be compromised by disclosure during this
type of litigation. Such litigation or proceedings could substantially increase our operating losses and reduce our resources
available for development 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 substantially greater financial resources. Uncertainties resulting from the initiation
and continuation of patent litigation or other proceedings could have an adverse effect on our ability to compete in the
marketplace.

We may not identify relevant third-party patents or may incorrectly interpret the relevance, scope or expiration of a
third-party patent, which might adversely affect our ability to develop, manufacture and market our product candidates.

We cannot guarantee that any of our or our licensors’ patent searches or analyses, including but not limited to the

identification of relevant patents, analysis of the scope of relevant patent claims or determination of the expiration of
relevant patents, are complete or thorough, nor can we be certain that we have identified each and every third-party patent
and pending application in the United States, the UK, the EU and elsewhere that is relevant to or necessary for the
commercialization of our product candidates in any jurisdiction. For example, in the United States, applications filed
before November 29, 2000 and certain applications filed after that date that will not be filed outside the United States
remain confidential until patents issue. Patent applications in the United States, the UK, the EU and elsewhere are
published approximately 18 months after the earliest filing for which priority is claimed, with such earliest filing date being
commonly referred to as the priority date. Therefore, patent applications covering our product candidates could be filed by
others without our knowledge. Additionally, pending patent applications that have been published can, subject to certain
limitations, be later amended in a manner that could cover our product candidates or the use of our product candidates.
After issuance, the scope of patent claims remains subject to construction as determined by an interpretation of the law, the
written disclosure in a patent and the patent’s prosecution history. Our interpretation of the relevance or the scope of a
patent or a pending application may be incorrect, which may negatively impact our ability to market our product
candidates. We may incorrectly determine that our product candidates are not covered by a third-party patent or may
incorrectly predict whether a third party’s pending application will issue with claims of relevant scope. Our determination
of the expiration date of any patent in the United States, the UK, the EU or elsewhere that we consider relevant may be
incorrect, which may negatively impact our ability to develop and market our product candidates. Our failure to identify
and correctly interpret relevant patents may negatively impact our ability to develop and market our product candidates.

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If we fail to correctly identify or interpret relevant patents, we may be subject to infringement claims. We cannot
guarantee that we will be able to successfully settle or otherwise resolve such infringement claims. If we fail in any such
dispute, in addition to being forced to pay monetary damages, we may be temporarily or permanently prohibited from
commercializing our product candidates. We might, if possible, also be forced to redesign our product candidates in a
manner that no longer infringes third-party intellectual property rights. Any of these events, even if we were ultimately to
prevail, could require us to divert substantial financial and management resources that we would otherwise be able to
devote to our business.

Changes in patent laws or patent jurisprudence could diminish the value of patents in general, thereby impairing our
ability to protect our product candidates.

Obtaining and enforcing patents in the biotechnology and genetic medicine industries involve both technological

complexity and legal complexity. In addition, the Leahy-Smith America Invents Act, or the AIA, which was passed in
September 2011, resulted in significant changes to the U.S. patent system.

An important change introduced by the AIA is that, as of March 16, 2013, the United States transitioned from a
“first-to-invent” to a “first-to-file” system for deciding which party should be granted a patent when two or more patent
applications are filed by different parties claiming the same invention. 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 a patent on
the invention regardless of whether another inventor had made the invention earlier. A third party that files a patent
application in the USPTO after that date but before us could therefore be awarded a patent covering an invention of ours
even if we made the invention before it was made by the third party. This will require us to be cognizant of the time from
invention to filing of a patent application and diligent in filing patent applications, but circumstances could prevent us from
promptly filing patent applications on our inventions.

In addition, a third party may attempt to use the USPTO procedures to invalidate our patent claims that would not

have been invalidated if first challenged by the third party as a defendant in a district court action because of a lower
evidentiary standard in USPTO proceedings compared to the evidentiary standard in U.S. federal courts necessary to
invalidate a patent claim. An adverse determination in any such proceeding could reduce the scope of, or invalidate, our
owned or in-licensed patent rights, allow third parties to commercialize our technology or products and compete directly
with us, without payment to us, or result in our inability to manufacture or commercialize products without infringing
third-party patent rights.

Additionally, the U.S. Supreme Court has ruled on several patent cases in recent years either narrowing the scope

of patent protection available in certain circumstances or weakening the rights of patent owners in certain situations, and
there are other open questions under patent law that courts have yet to decisively address. In addition to increasing
uncertainty with regard to our ability to obtain patents in the future, this combination of events has created uncertainty with
respect to the value of patents, once obtained. Depending on decisions by Congress, the federal courts and the USPTO, the
laws and regulations governing patents could change in unpredictable ways and could weaken our ability to obtain new
patents or to enforce our existing patents and patents that we might obtain in the future. In addition, the European patent
system is relatively stringent in the type of amendments that are allowed during prosecution, but, the complexity and
uncertainty of European patent laws has also increased in recent years. Complying with these laws and regulations could
limit our ability to obtain new patents that may be important for our business.

We enjoy only limited geographical protection with respect to certain patents and we may not be able to protect our
intellectual property rights throughout the world.

Filing, prosecuting and defending patents covering our product candidates in all countries throughout the world
would be prohibitively expensive, and our intellectual property rights in some countries outside the United States can be
less extensive than those in the United States. In-licensing patents covering our product candidates in all countries
throughout the world may similarly be prohibitively expensive, if such opportunities are available at all. And in-

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licensing or filing, prosecuting and defending patents even in only those jurisdictions in which we develop or
commercialize our product candidates may be prohibitively expensive or impractical. Competitors may use our and our
licensors’ technologies in jurisdictions where we have not obtained patent protection or licensed patents to develop their
own products and, further, may export otherwise infringing products to territories where we and our licensors have patent
protection, but enforcement is not as strong as that in the United States, the UK or the EU. These products may compete
with our product candidates, and our or our licensors’ patents or other intellectual property rights may not be effective or
sufficient to prevent them from competing.

The laws of some jurisdictions do not protect intellectual property rights to the same extent as the laws or

regulations in the United States, the UK and the EU, and many companies have encountered significant difficulties in
protecting and defending proprietary rights in such jurisdictions. Moreover, the legal systems of certain countries,
particularly certain developing countries, do not favor the enforcement of patents, trade secrets or other forms of
intellectual property, which could make it difficult for us to prevent competitors in some jurisdictions from marketing
competing products in violation of our proprietary rights generally. Proceedings to enforce our patent rights in foreign
jurisdictions, whether or not successful, are likely to result in substantial costs and divert our efforts and attention from
other aspects of our business, and additionally could put at risk our or our licensors’ patents of being invalidated or
interpreted narrowly, could increase the risk of our or our licensors’ patent applications not issuing, or could provoke third
parties to assert claims against us. We may not prevail in any lawsuits that we initiate, while damages or other remedies
may be awarded to the adverse party, which may be commercially significant. If we prevail, damages or other remedies
awarded to us, if any, may not be commercially meaningful. Accordingly, our efforts, or the efforts of our licensors or
collaborators, to enforce intellectual property rights around the world may be inadequate to obtain a significant commercial
advantage from the intellectual property that we develop or license.

Patent terms may be inadequate to protect our competitive position on our product candidates for an adequate amount
of time.

The term of any individual patent depends on applicable law in the country where the patent is granted. In the

United States, provided all maintenance fees are timely paid, a patent generally has a term of 20 years from its application
filing date or earliest claimed non-provisional filing date. Extensions may be available under certain circumstances, but the
life of a patent and, correspondingly, the protection it affords is limited. Even if we or our licensors obtain patents covering
our product candidates, when the terms of all patents covering a product expire, our business may become subject to
competition from competitive medications, including generic medications. Given the amount of time required for the
development, testing and regulatory review and approval of new product candidates, patents protecting such candidates
may expire before or shortly after such candidates are commercialized. As a result, our owned and licensed patent portfolio
may not provide us with sufficient rights to exclude others from commercializing products similar or identical to ours.

If we do not obtain patent term extension in the United States under the Hatch-Waxman Act and in foreign countries
under similar legislation, thereby potentially extending the term of marketing exclusivity for our product candidates,
our business may be harmed.

In the United States, a patent that covers an FDA-approved drug or biologic may be eligible for a term extension
designed to restore the period of the patent term that is lost during the premarket regulatory review process conducted by
the FDA. Depending upon the timing, duration and conditions of 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 the Hatch-Waxman Act, which permits a patent term extension of up to five years for a
patent covering an approved product as compensation for effective patent term lost during product development and the
FDA regulatory review process. In the UK and the EU, our product candidates may be eligible for term extensions based
on similar legislation. In each of these jurisdictions, however, we may not receive an extension if we fail to apply within
applicable deadlines, fail to apply prior to expiration of relevant patents or otherwise fail to satisfy applicable requirements.
Even if we are granted such extension, the duration of such extension

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may be less than our request. If we are unable to obtain a patent term extension, or if the term of any such extension is less
than our request, the period during which we can enforce our patent rights for that product will be essentially shortened and
our competitors may obtain approval to market competing products sooner. The resulting reduction in revenue from
applicable products could be substantial.

Our proprietary rights may not adequately protect our technologies and product candidates, and do not necessarily
address all potential threats to our competitive advantage.

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. The following examples are illustrative:

● others may be able to make products that are the same as or similar to our product candidates but that are not

covered by the claims of the patents that we own or have exclusively licensed;

● others, including inventors or developers of our owned or in-licensed patented technologies who may
become involved with competitors, may independently develop similar technologies that function as
alternatives or replacements for any of our technologies without infringing our intellectual property rights;

● we or our licensors or our other collaboration partners might not have been the first to conceive and reduce to
practice the inventions covered by the patents or patent applications that we own, license or will own or
license;

● we or our licensors or our other collaboration partners might not have been the first to file patent applications

covering certain of the patents or patent applications that we or they own or have obtained a license, or will
own or will have obtained a license;

● we or our licensors may fail to meet obligations to the U.S. government with respect to in-licensed patents

and patent applications funded by U.S. government grants, leading to the loss of patent rights;

● issued patents that we own or exclusively license may not provide us with any competitive advantage, or may

be held invalid or unenforceable, as a result of legal challenges by our competitors; and

● our competitors might conduct research and development activities in countries where we do not have patent

rights, or in countries where research and development safe harbor laws exist, and then use the information
learned from such activities to develop competitive products for sale in our major commercial markets.

Our reliance on third parties may require us to share our trade secrets, which increases the possibility that our trade
secrets will be misappropriated or disclosed, and confidentiality agreements with employees and third parties may not
adequately prevent disclosure of trade secrets and protect other proprietary information.

We consider proprietary trade secrets, confidential know-how and unpatented know-how to be important to our

business. We may rely on trade secrets and confidential know-how to protect our technology, especially where patent
protection is believed by us to be of limited value. However, trade secrets and confidential know-how are difficult to
protect, and we have limited control over the protection of trade secrets and confidential know-how used by our licensors,
collaborators and suppliers. Because we have relied in the past on third parties to manufacture our product candidates,
because we may continue to do so in the future, and because we expect to collaborate with third parties on the development
of our current product candidates and any future product candidates we develop, we may, at times, share trade secrets with
them. We also conduct joint research and development programs that may require us to share

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trade secrets under the terms of our research and development partnerships or similar agreements. Under such
circumstances, trade secrets and confidential know-how can be difficult to maintain as confidential.

To protect this type of information against disclosure or appropriation by competitors, our policy is to require our 

employees, consultants, contractors and advisors to enter into confidentiality agreements and, if applicable, material 
transfer agreements, consulting agreements or other similar agreements with us 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, including our trade secrets. However, current or former employees, consultants, contractors and advisers may 
unintentionally or willfully disclose our confidential information to competitors, and confidentiality agreements may not 
provide an adequate remedy in the event of unauthorized disclosure of confidential information. We may also be subject to 
claims that our employees, consultants or independent contractors have wrongfully used or disclosed confidential 
information of their former employers or other 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 competitive position is 
based, in part, on our know-how and trade secrets, a competitor’s discovery of our trade secrets or other unauthorized use 
or disclosure would impair our competitive position and may have an adverse effect on our business and results of 
operations. Enforcing a claim that a third party obtained illegally and is using trade secrets and/or confidential know-how is 
expensive, time consuming and unpredictable, and the enforceability of confidentiality agreements may vary from 
jurisdiction to jurisdiction. Courts outside the United States are sometimes less willing to protect proprietary information, 
technology and know-how.

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.

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. Our trademark MeiraGTx has been
registered in the EU, UK and United States. 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 unregistered trademarks
or trade names. Over the long term, if we are unable to successfully register our trademarks and trade names and 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.

We may need to license additional intellectual property from third parties, and such licenses may not be available or
may not be available on commercially reasonable terms.

The growth of our business may depend in part on our ability to acquire or in-license additional proprietary rights.

For example, our programs may involve product candidates that may require the use of additional proprietary rights held
by third parties. Our product candidates or equipment may also require specific formulations to work effectively and
efficiently. These formulations may be covered by intellectual property rights held by others. We may develop products
containing our compositions and pre-existing pharmaceutical compositions. These pharmaceutical products may be
covered by intellectual property rights held by others. We may be required by the FDA, MHRA, EMA or other foreign
regulatory authorities to provide a companion diagnostic test or tests with our product candidates. These diagnostic test or
tests may be covered by intellectual property rights held by others. We may be unable to acquire or in-license any relevant
third-party intellectual property rights that we identify as necessary or important to our business operations. We may fail to
obtain any of these licenses at a reasonable cost or on reasonable terms, if at all, which would

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harm our business. We may need to cease use of the compositions or methods covered by such third-party intellectual
property rights, and may need to seek to develop alternative approaches that do not infringe on such intellectual property
rights which may entail additional costs and development delays, even if we were able to develop such alternatives, which
may not be feasible. Even if we are able to obtain a license under such intellectual property rights, any such license may be
non-exclusive, which may allow our competitors access to the same technologies licensed to us.

Risks Related to Employee Matters and Managing Growth

We will need to expand our organization, and we may experience difficulties in managing this growth, which could
disrupt our operations.

As of December 31, 2020, we had 219 full-time employees. We expect to continue to significantly expand our

organization, including hiring and training significant numbers of employees and managerial personnel to staff our
expanding manufacturing and supply chain operations in our new facilities in Ireland. We may have difficulty identifying,
hiring and integrating new personnel. Future growth would impose significant additional responsibilities on our
management, including the need to identify, recruit, maintain, motivate and integrate additional employees, consultants and
contractors. Also, our management may need to divert a disproportionate amount of its attention away from our day-to-day
activities and devote a substantial amount of time to managing these growth activities. We may not be able to effectively
manage the expansion of our operations, which may result in weaknesses in our infrastructure, give rise to operational
mistakes, loss of business opportunities, loss of employees and reduced productivity among remaining employees. Our
expected growth could require significant capital expenditures and may divert financial resources from other projects, such
as the development of product candidates. If our management is unable to effectively manage our growth, our expenses
may increase more than expected, our ability to generate and/or grow revenues could be reduced, and we may not be able
to implement our business strategy. Our future financial performance and our ability to commercialize our product
candidates and compete effectively will depend, in part, on our ability to effectively manage any future growth. Our
expected growth could require significant capital expenditures and may divert financial resources from other projects, such
as the development of additional product candidates. If our management is unable to effectively manage our expected
growth, our expenses may increase more than expected, our potential ability to generate revenue could be reduced and we
may not be able to implement our business strategy. Many of the biotechnology companies that we compete against for
qualified personnel and consultants have greater financial and other resources, different risk profiles and a longer history in
the industry than we do. If we are unable to continue to attract and retain high-quality personnel and consultants, the rate
and success at which we can discover and develop product candidates and operate our business will be limited.

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

Our industry has experienced a high rate of turnover of management personnel in recent years. We are highly

dependent on the development, regulatory, commercialization and business development expertise of Alexandria Forbes,
Ph.D., our President and Chief Executive Officer, Rich Giroux, our Chief Operating Officer and Chief Financial Officer
and Stuart Naylor, Ph.D., our Chief Development Officer, as well as the other principal members of our management,
scientific and clinical teams. Although we have formal employment agreements with certain of our executive officers,
these agreements do not prevent them from terminating their employment with us at any time and, for certain of our
executive officers, entitle them to receive severance payments in connection with their voluntary resignation of
employment.

If we lose one or more of our executive officers or key employees, our ability to implement our business strategy
successfully could be seriously harmed. Furthermore, replacing executive officers and key employees may be difficult and
may take an extended period of time because of the limited number of individuals in our industry with the breadth of skills
and experience required to develop, gain regulatory approval of and commercialize product candidates successfully.
Competition to hire from this limited pool is intense, and we may be unable to hire, train, retain or motivate

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these additional key personnel on acceptable terms given the competition among numerous pharmaceutical and
biotechnology companies for similar personnel. In addition, we rely on consultants and advisors, including scientific and
clinical advisors, to assist us in formulating our research and development and commercialization strategy. Our consultants
and advisors may be engaged by entities other than us and may have commitments under consulting or advisory contracts
with other entities that may limit their availability to us. If we are unable to continue to attract and retain high quality
personnel, our ability to develop and commercialize product candidates will be limited.

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

The use of our product candidates in clinical trials and the sale of any products for which we obtain marketing

approval exposes us to the risk of product liability claims. Product liability claims might be brought against us by
consumers, health care providers, pharmaceutical companies or others selling or otherwise coming into contact with our
products. On occasion, large judgments have been awarded in class action lawsuits based on products that had
unanticipated adverse effects. If we cannot successfully defend against product liability claims, we could incur substantial
liability and costs. In addition, regardless of merit or eventual outcome, product liability claims may result in:

● impairment of our business reputation and significant negative media attention;

● withdrawal of participants from our clinical trials;

● significant time, costs and diversion of management resources to defend the related litigation;

● substantial monetary awards to patients or other claimants;

● inability to commercialize our product candidates;

● product recalls, withdrawals or labeling, marketing or promotional restrictions;

● decreased demand for our product candidates, if approved for commercial sale; and

● loss of revenue.

Our insurance policies are expensive and protect us only from some business risks, which leaves us exposed to
significant uninsured liabilities.

We do not carry insurance for all categories of risk that our business may encounter. Some of the policies we

currently maintain include general liability, clinical trial liability, employment practices liability, property, auto, workers’
compensation, umbrella, cyber and directors’ and officers’ insurance. Any additional product liability insurance coverage
we acquire in the future, may not be sufficient to reimburse us for any expenses or losses we may suffer. Moreover,
insurance coverage is becoming increasingly expensive and in the future we may not be able to maintain insurance
coverage at a reasonable cost or in sufficient amounts to protect us against losses due to liability. If we obtain marketing
approval for our product candidates, we intend to acquire insurance coverage to include the sale of commercial products;
however, we may be unable to obtain product liability insurance on commercially reasonable terms or in adequate amounts.
A successful product liability claim or series of claims brought against us could cause our share price to decline and, if
judgments exceed our insurance coverage, could adversely affect our results of operations and business, including
preventing or limiting the commercialization of any product candidates we develop. We do not carry specific biological or
hazardous waste insurance coverage, and our property, casualty and general liability insurance policies specifically exclude
coverage for damages and fines arising from biological or hazardous waste exposure or contamination. Accordingly, in the
event of contamination or injury, we could be held liable for damages or

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be penalized with fines in an amount exceeding our resources, and our clinical trials or regulatory approvals could be
suspended.

Operating as a public company 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. If we are unable to maintain
existing insurance with adequate levels of coverage, any significant uninsured liability may require us to pay substantial
amounts, which would adversely affect our cash position and results of operations.

Our employees and independent contractors, including consultants, vendors, and any third parties we may engage in
connection with development and commercialization may engage in misconduct or other improper activities, including
noncompliance with regulatory standards and requirements, which could harm our business.

Misconduct by our employees and independent contractors, including consultants, vendors, and any third parties

we may engage in connection with development and commercialization, could include intentional, reckless or negligent
conduct or unauthorized activities that violate: (i) applicable laws and regulations of the FDA, MHRA, EMA and other
regulatory or governmental authorities, including those laws that require the reporting of true, complete and accurate
information to such authorities; (ii) manufacturing standards; (iii) data privacy, security, fraud and abuse and other
healthcare laws and regulations; or (iv) laws that require the reporting of true, complete and accurate financial information
and data. Specifically, 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 may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales commission,
customer incentive programs and other business arrangements. Activities subject to these laws could also involve the
improper use or misrepresentation of information obtained in the course of clinical trials, creation of fraudulent data in
preclinical studies or clinical trials or illegal misappropriation of drug product, which could result in regulatory sanctions
and cause serious harm to our reputation. It is not always possible to identify and deter misconduct by employees and other
third parties, 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 governmental investigations or other actions or lawsuits stemming from
a failure to comply with such laws or regulations. Additionally, we are subject to the risk that a person or government could
allege such fraud or other misconduct, even if none occurred. 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 and
results of operations, including the imposition of significant civil, criminal and administrative penalties, damages,
monetary fines, disgorgements, possible exclusion from participation in Medicare, Medicaid, other U.S. federal healthcare
programs or healthcare programs in other jurisdictions, integrity oversight and reporting obligations to resolve allegations
of non-compliance, individual imprisonment, other sanctions, contractual damages, reputational harm, diminished profits
and future earnings, and curtailment of our operations.

Our business and operations would suffer in the event of system failures and our systems and those of our business
partners and service providers may be vulnerable to cybersecurity risks.

Our computer systems, as well as those of our business partners and service providers, are vulnerable to damage 

from computer viruses, unauthorized access, hardware and software failures, natural disasters, terrorism, war and 
telecommunication and electrical failures. If such an event were to occur, it could result in a material disruption of our 
product candidate development programs or manufacturing operations. For example, the loss of preclinical study or clinical 
trial data from completed, ongoing or planned trials could result in delays in our regulatory approval efforts and 
significantly increase our costs to recover or reproduce the data. A significant interruption to our manufacturing operations 
could delay the completion of clinical trials and increase the costs of those trials.  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 personal, 
confidential or proprietary information, we could incur liability and the further development of our product candidates 
could be delayed.

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In the ordinary course of our business, we collect, process and store sensitive data, including intellectual property,
clinical  trial  data,  proprietary  business  information,  personal  data  and  personally  identifiable  information  of  our  clinical
trial  subjects  and  employees.  The  secure  processing,  maintenance  and  transmission  of  this  information  is  critical  to  our
operations. Increased cybersecurity threats pose a risk to this information, in addition to our and our business partners’ and
service  providers’  systems  and  networks.  Despite  our  security  measures,  our  information  technology  and  infrastructure
may  be  vulnerable  to  cyber-attacks  by  hackers  or  internal  bad  actors,  or  breached  due  to  employee  error,  a  technical
vulnerability,  malfeasance  or  other  disruptions  that  could  have  a  negative  impact,  including  loss  or  destruction  of  data
(including  confidential  information).  Although,  to  our  knowledge,  we  have  not  experienced  any  such  material  security
breach  to  date,  we  may  experience  cybersecurity  incidents  such  as  malware  infections,  phishing  attempts,  thefts  of
personal, confidential or proprietary information and other attempts at compromising our information technology that are
typical for a company of our size in our market. Any security breach could compromise our networks and the information
stored there could be accessed, publicly disclosed, lost or stolen. Any such access, disclosure or other loss of information
could result in legal claims or proceedings, liability under laws that protect the privacy of personal information, significant
regulatory penalties, and such an event could disrupt our operations, damage our reputation, result in significant expenses
in  implementing  future  security  measures  and  cause  a  loss  of  confidence  in  us  and  our  ability  to  conduct  clinical  trials,
which could adversely affect our reputation and financial results, and delay clinical development of our product candidates.

The UK’s withdrawal from the EU has resulted in changes to regulatory requirements and has had and may continue to
have a negative effect on global economic conditions, financial markets and our business, which could reduce the price
of our shares.

Following a national referendum and enactment of legislation by the government of the UK, the UK formally
withdrew from the EU on January 31, 2020, commonly referred to as “Brexit” and, following the expiry of the Brexit
transitional period on December 31, 2020, the UK now operates under a distinct regulatory regime and certain EU laws
now only apply to the UK in respect of Northern Ireland (as laid out in the Protocol on Ireland and Northern Ireland,
including but not limited to MAs). The MHRA is now the UK’s standalone regulator. Although the UK and EU have now
reached an agreement on its future trading relationship (to be implemented in the TCA from January 1, 2021), the
agreement does not cover all regulatory areas regarding supply of medicinal product, which will likely be subject to future
bilateral discussions going forward and could further change the relationship between the UK and the EU in this regard.

EU laws which have been transposed into UK law through secondary legislation continue to be applicable as
“retained EU law”. However, new legislation such as the EU Clinical Trials Regulation, (“EU CTR”) or in relation to
orphan medicines will not be applicable. In addition, as there is no general power to amend the “retained EU law”, the UK
government has introduced a new Medicines and Medical Devices Bill which seeks to address regulatory gaps through
implementing regulations and delegated powers covering, among other things, the fields of human medicines and clinical
trials of human medicines. Despite regulatory authorities in the UK indicating in the bill that new UK rules will closely
align with EU laws, detailed proposals are yet to be published and there is still a risk of regulatory divergence.

Brexit has created additional administrative burdens that are likely to result in disruptions to and uncertainty
surrounding our planned clinical trials and activities in the UK and the EU, which may impact relationships with our
existing and prospective customers, partners, vendors and employees. Already, various benefits of membership no longer
apply to the UK for clinical trials, such that, for example, UK sponsored trials that span several EU countries now need to
have an individual or organization in the EU to act as a legal representative, or sponsor and it is unclear whether the UK
will have access to new EU clinical trial databases such as the Clinical Trial Information System going forward, (the
centralized EU Portal for clinical trial information storage). Additionally, new rules apply to the import of investigational
medicinal products from the EU and EEA to Great Britain.

While agreement on the terms of the TCA has avoided a “no deal” Brexit scenario, and provides in principle for

quota and tariff free trading of goods, it is nevertheless expected that the TCA will result in the creation of non-tariff

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barriers (such as increased shipping and regulatory costs and complexities) to the trade in goods between the UK and EU.
Further, the TCA does not provide for the continued free movement of services between the UK and EU and also grants
each of the UK and EU the ability, in certain circumstances, to unilaterally impose tariffs on one another. The TCA does
provide for the mutual recognition of GMP, inspections of manufacturing facilities for medicinal products and GMP
documents issued. However, it is important to note that significant regulatory gaps still exist and the TCA does not contain
wholesale mutual recognition of UK and EU pharmaceutical regulations and product standards between the parties, for
example, in relation to batch testing and pharmacovigilance, which remain subject to further discussions.

For MAs, an applicant for a centralized procedure MA must be established in the EU. After Brexit, companies

established in the UK cannot use the centralized procedure and instead must follow one of the UK national authorization
procedures or one of the remaining post-Brexit international cooperation procedures (such as the Access Consortium) to
obtain an MA to market products in the UK. The MHRA may rely on a decision taken by the European Commission on the
approval of a new (centralized procedure) MA when determining an application for a Great Britain MA; or use the
MHRA’s decentralized or mutual recognition procedures which enable MAs approved in EU member states (or Iceland,
Liechtenstein, Norway) to be granted in Great Britain. Additionally, the ‘Unfettered Access Procedure’ enables an MAH in
Northern Ireland to seek recognition in Great Britain.

The full impact of these new arrangements and requirements, both on our existing processes and our ability to
adjust our business and operations to operate successfully in the UK and EU, as well as more broadly on UK-EU cross-
border trade and the economy, are expected to become clearer in the course of 2021. In particular, it remains to be seen
whether the initial implementation of, and adjustment of UK-EU trading processes for, the TCA could disrupt or otherwise
negatively impact our business and operations. These negative impacts could include amongst others a decrease in foreign
direct investment in the UK, an increase of our costs, disruption of our supply chains, restrictions on our ability to access
capital and depression on economic activity or economic instability, which could in turn lead to a reduction in asset
valuations, currency exchange rates and credit ratings.

In addition, the TCA has imposed additional restrictions on the free movement of people between the UK and the
EU, which could have a material adverse effect on us, since we compete in these jurisdictions for well qualified employees
in all aspects of our business. Any impact on our ability to attract new employees and to retain existing employees in their
current jurisdictions could decrease our competitiveness. Any of these factors could have an adverse effect on our business,
financial condition, results of operations, and prospects.

Risks Related to Our Ordinary Shares

The market price of our ordinary shares may be volatile and fluctuate substantially, which could result in substantial
losses for purchasers of our ordinary shares.

Our share price is likely to be volatile. The stock market in general and the market for smaller biopharmaceutical
companies in particular have experienced extreme volatility that has often been unrelated to the operating performance of
particular companies. Additionally, the trading prices for our ordinary shares and the shares of other smaller
biopharmaceutical companies have been and continue to be highly volatile as a result of the COVID-19 pandemic. As a
result of this volatility, you may not be able to sell your ordinary shares at or above your purchase price. The market price
for our ordinary shares may be influenced by many factors, including:

● the success of competitive products or technologies;

● actual or expected changes in our growth rate relative to our competitors;

● results of clinical trials of our product candidates or those of our competitors;

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● developments related to our existing or any future collaborations;

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

● development of new product candidates that may address our markets and make our product candidates less

attractive;

● changes in physician, hospital or healthcare provider practices that may make our product candidates less

useful;

● announcements by us, our partners or our competitors of significant acquisitions, strategic partnerships, joint

ventures, collaborations or capital commitments;

● 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;

● failure to meet or exceed financial estimates and projections of the investment community or that we provide

to the public;

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

● actual or expected 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;

● changes in accounting principles; and

● the other factors described in this “Item 1A. Risk Factors” section and elsewhere in this Form 10-K.

In addition, the stock market in general, and Nasdaq and biopharmaceutical companies in particular, have 

experienced extreme price and volume fluctuations that have often been unrelated or disproportionate to the operating 
performance of these companies. In the past, when the market price of a security has been volatile, holders of that security 
have sometimes instituted securities class action litigation against the issuer. This risk is especially relevant for us because 
biopharmaceutical companies have experienced significant stock price volatility in recent years and during the COVID-19 
pandemic.  If any of the holders of our ordinary shares were to bring such a lawsuit against us, we could incur substantial 
costs defending the lawsuit and the attention of our senior management would be diverted from the operation of our 
business. Any adverse determination in litigation could also subject us to significant liabilities. Broad market and industry 
factors may negatively affect the market price of our ordinary shares, as well as general economic, 

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political and market conditions such as recessions, interest rate changes or international currency fluctuations, regardless of 
our actual operating performance. Further, a decline in the financial markets and related factors beyond our control may 
cause the price of our ordinary shares to decline rapidly and unexpectedly. If the market price of our ordinary shares does 
not exceed your purchase price, you may not realize any return on your investment in us and may lose some or all of your 
investment.

Our executive officers, directors and principal shareholders, if they choose to act together, have the ability to
significantly influence all matters submitted to shareholders for approval.

As of December 31, 2020, our executive officers, directors and shareholders who owned more than 5% of our

outstanding ordinary shares and their respective affiliates, in the aggregate, hold ordinary shares representing
approximately 41.1% of our outstanding ordinary shares.

As a result, if these shareholders choose to act together, they would be able to significantly influence all matters

submitted to our shareholders for approval, as well as our management and affairs. For example, these persons, if they
choose to act together, would significantly influence the election of directors, the composition of our management and
approval of any merger, consolidation, sale of all or substantially all of our assets or other business combination that other
shareholders may desire. Any of these actions could adversely affect the market price of our ordinary shares.

We are an “emerging growth company” and a “smaller reporting company,” and the reduced disclosure requirements
applicable to emerging growth companies and smaller reporting companies may make our ordinary shares less
attractive to investors.

We are an “emerging growth company,” as defined in the Jumpstart Our Business Startups Act of 2012 (“JOBS

Act”), and may remain an emerging growth company until the last day of the fiscal year following the fifth anniversary of
our IPO. However, if certain events occur prior to the end of such five-year period, including if we become a “large
accelerated filer,” our annual gross revenues exceed $1.07 billion or we issue more than $1.0 billion of non-convertible
debt in any three-year period, we will cease to be an emerging growth company prior to the end of such five-year period.
For so long as we remain an emerging growth company, we are permitted and intend to rely on exemptions from certain
disclosure requirements that are applicable to other public companies that are not emerging growth companies. These
exemptions include:

● reduced disclosure obligations relating to the presentation of financial statements in the “Management’s

Discussion and Analysis of Financial Condition and Results of Operations” disclosure in our periodic reports
filed with the SEC;

● not being required to comply with the auditor attestation requirements in the assessment of our internal

control over financial reporting;

● 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

shareholder approval of any golden parachute payments not previously approved.

In addition, the JOBS Act provides that an emerging growth company can take advantage of an extended

transition period for complying with new or revised accounting standards. This allows an emerging growth company to

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delay the adoption of these accounting standards until they would otherwise apply to private companies. We have elected to
take advantage of this extended transition period.

We are also a smaller reporting company, and we will remain a smaller reporting company until the fiscal year

following the determination that our voting and non-voting ordinary shares held by non-affiliates is more than $250 million
measured on the last business day of our second fiscal quarter, or our annual revenues are more than $100 million during
the most recently completed fiscal year and our voting and non-voting ordinary shares held by non-affiliates is more than
$700 million measured on the last business day of our second fiscal quarter. Similar to emerging growth companies,
smaller reporting companies are able to provide simplified executive compensation disclosure, are exempt from the auditor
attestation requirements of Section 404, and have certain other reduced disclosure obligations, including, among other
things, not being required to provide selected financial data, supplemental financial information or risk factors.

We may choose to take advantage of some, but not all, of the available exemptions for emerging growth

companies and smaller reporting companies. We cannot predict whether investors will find our ordinary shares less
attractive if we rely on these exemptions. If some investors find our ordinary shares less attractive as a result, there may be
a less active trading market for our ordinary shares and our share price may be more volatile.

Anti-takeover provisions in our organizational documents and Cayman Islands law may discourage or prevent a change
of control, even if an acquisition would be beneficial to our shareholders, which could depress the price of our ordinary
shares and prevent attempts by our shareholders to replace or remove our current management.

Our memorandum and articles of association contain provisions that may discourage unsolicited takeover

proposals that shareholders may consider to be in their best interests. Our board of directors is divided into three classes
with staggered, three-year terms. Our board of directors has the ability to designate the terms of and issue preferred shares
without shareholder approval. We are also subject to certain provisions under Cayman Islands law that could delay or
prevent a change of control. Together these provisions may make more difficult the removal of management and may
discourage transactions that otherwise could involve payment of a premium over prevailing market prices for our ordinary
shares.

There may be difficulties in enforcing foreign judgments against our management or us.

Certain of our directors and management reside outside the United States. A significant portion of our assets and

such persons’ assets are located outside the United States. As a result, it may be difficult or impossible for investors to
effect service of process upon us within the United States or other jurisdictions, including judgments predicated upon the
civil liability provisions of the federal securities laws of the United States.

In particular, investors should be aware that there is uncertainty as to whether the courts of the Cayman Islands or

any other applicable jurisdictions would recognize and enforce judgments of U.S. courts obtained against us or our
directors or management predicated upon the civil liability provisions of the securities laws of the United States or any
state in the United States or entertain original actions brought in the Cayman Islands or any other applicable jurisdiction’s
courts against us or our directors or officers predicated upon the securities laws of the United States or any state in the
United States.

The rights of our shareholders differ from the rights typically offered to shareholders of a U.S. corporation.

Our corporate affairs and the rights of holders of ordinary shares are governed by Cayman Islands law, including

the provisions of the Cayman Islands Companies Law (2018 Revision), or the Companies Law, the common law of the
Cayman Islands and by our memorandum and articles of association. We are also subject to the federal securities laws of
the United States. The rights of shareholders to take action against the directors, actions by minority shareholders and the
fiduciary responsibilities of our directors to us under Cayman Islands law are to a large extent

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governed by the common law of the Cayman Islands. The common law of the Cayman Islands is derived in part from
comparatively limited judicial precedent in the Cayman Islands as well as from English common law, the decisions of
whose courts are of persuasive authority, but are not binding on a court in the Cayman Islands. The rights of our
shareholders and the fiduciary responsibilities of our directors under Cayman Islands law are different from what they
would be under statutes or judicial precedent in some jurisdictions in the United States. In particular, the Cayman Islands
has a different body of securities laws as compared to the United States, and certain states, such as Delaware, may have
more fully developed and judicially interpreted bodies of corporate law. In addition, Cayman Islands companies may not
have standing to initiate a shareholders derivative action in a Federal court of the United States.

As a result of all of the above, public shareholders may have more difficulty in protecting their interests in the face

of actions taken by management, members of the board of directors or controlling shareholders than they would as public
shareholders of a United States company.

We expect to be treated as resident in the UK for tax purposes, but may be treated as a dual resident company for UK tax
purposes.

Our board of directors conducts our affairs so that the central management and control of the company is
exercised in the UK. As a result, we expect to be treated as resident in the UK for UK tax purposes. Accordingly, we expect
to be subject to UK taxation on our income and gains, except where an exemption applies.

However, we may be treated as a dual resident company for UK tax purposes. As a result, our right to claim

certain reliefs from UK tax may be restricted, and changes in law or practice in the UK could result in the imposition of
further restrictions on our right to claim UK tax reliefs.

We may be classified as a passive foreign investment company, or PFIC, for U.S. federal income tax purposes, which
could result in adverse U.S. federal income tax consequences to U.S. investors in our ordinary shares.

Based on the current and anticipated value of our assets, including goodwill, and the current and anticipated

composition of our income, assets and operations, we do not believe we were a PFIC for the taxable year ended on
December 31, 2020, and do not expect to be a PFIC for the current taxable year. However, the application of the PFIC rules
is subject to uncertainty in several respects, and we cannot assure you that the U.S. Internal Revenue Service, or the IRS,
will not take a contrary position. Furthermore, a separate determination must be made after the close of each taxable year
as to whether we are a PFIC for that year. Accordingly, we cannot assure you that we were not a PFIC for our taxable year
ended on December 31, 2020 or that we will not be a PFIC for our current taxable year or any future taxable year. A non-
U.S. company will be considered a PFIC for any taxable year if (i) at least 75% of its gross income is passive income
(including interest income), or (ii) at least 50% of the value of its assets (based on an average of the quarterly values of the 
assets during a taxable year) is attributable to assets that produce or are held for the production of passive income. The 
value of our assets generally is determined by reference to the market price of our ordinary shares, which may fluctuate 
considerably.  In addition, the composition of our income and assets is affected by how, and how quickly, we spend any 
cash we raise.  If we were to be classified as a PFIC for any taxable year during which a U.S. holder holds our ordinary 
shares, certain materially adverse U.S. federal income tax consequences could apply to such U.S. holder.

If a United States person is treated as owning at least 10% of our ordinary shares, such holder may be subject to adverse
U.S. federal income tax consequences.

If a U.S. holder of our ordinary shares is treated as owning (directly, indirectly or constructively) at least 10% of

the value or voting power of our ordinary shares, such U.S. holder may be treated as a “United States shareholder” with
respect to each “controlled foreign corporation” in our group (if any). If our group includes one or more U.S. subsidiaries,
certain of our non-U.S. subsidiaries could be treated as controlled foreign corporations (regardless of whether we are
treated as a controlled foreign corporation). A United States shareholder of a controlled foreign

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corporation may be required to report annually and include in its U.S. taxable income its pro rata share of “Subpart F
income,” “global intangible low-taxed income” and investments in U.S. property by controlled foreign corporations,
regardless of whether we make any distributions. An individual that is a United States shareholder with respect to a
controlled foreign corporation generally would not be allowed certain tax deductions or foreign tax credits that would be
allowed to a United States shareholder that is a U.S. corporation. Failure to comply with these reporting obligations may
subject you to significant monetary penalties and may prevent the statute of limitations from starting with respect to your
U.S. federal income tax return for the year for which reporting was due. We cannot provide any assurances that we will
assist investors in determining whether any of our non-U.S. subsidiaries is treated as a controlled foreign corporation or
whether such investor is treated as a United States shareholder with respect to any of such controlled foreign corporations.
Further, we cannot provide any assurances that we will furnish to any United States shareholders information that may be
necessary to comply with the aforementioned reporting and tax payment obligations. U.S. holders of our ordinary shares
should consult their tax advisors regarding the potential application of these rules to their investment in our ordinary
shares.

Changes in tax laws or challenges to our tax position could adversely affect our results of operations and financial
condition.

We are subject to complex tax laws that are subject to change or differing interpretations, including on a 
retroactive basis.  Any such changes in tax laws, regulations and treaties, or the interpretation thereof, tax policy initiatives 
and reforms under consideration and the practices of tax authorities in jurisdictions in which we operate could adversely 
affect our tax position, including our effective tax rate or tax payments.

We have significant U.S. federal and state net operating losses, or NOLs, and UK and Netherlands carryforward tax
losses which we may not be able to realize or which may be restricted under applicable law. We also benefit from certain
tax incentive regimes, such as research and development tax credits. Any adverse change to these regimes, the
application thereof or challenges to the tax position we have adopted under these rules could adversely affect our results
of operations and financial condition.

As of December 31, 2020, we had federal and state NOL carryforwards in the United States of $34.7 million and

$34.4 million, respectively, cumulative carryforward tax losses in the UK of $142.2 million, and $26.1 million in the
Netherlands, which we expect to be available to reduce future taxable income subject to any relevant restrictions (including
those in the U.S. and UK that limit the percentage of taxable income that can be reduced by NOLs and carried forward
losses). The U.S. federal and state NOLs incurred prior to January 1, 2018 in the amount of approximately $6.8 million and
$6.7 million, respectively, will begin to expire in 2035. U.S. federal NOLs generated after December 31, 2017 are not
subject to expiration but such NOLs may only offset 80% of taxable income for taxable years beginning after December
31, 2020. As of December 31, 2020, we also had orphan drug and research and development credits in the U.S. in the
amount of $4.6 million and research and development credits in the UK of $1.2 million. The UK carryforward tax losses
will continue indefinitely, subject to relevant restrictions, under current UK legislation. The Netherlands carryforward tax
losses expire after nine years from the date incurred prior to 2019 and six years for tax losses incurred after 2018.

The NOLs and UK and Netherlands carryforward tax losses are subject to review and possible adjustment by the

U.S. federal and state and UK tax authorities. Additionally, NOLs and UK carryforward tax losses, and research and
development tax credits, may become subject to limitations in the event of certain cumulative changes in the ownership
interest of significant shareholders, as determined under Sections 382 of the United States Internal Revenue Code, as well
as the Corporation Tax Act 2010 Part 14 under the UK tax rules. This could limit the amount of NOLs or carryforward tax
losses that we can utilize annually to offset future taxable income or tax liabilities. We have conducted a review of changes
in the ownership interest of significant shareholders and determined that as of December 31, 2019, there were no
limitations in the UK. However, for U.S. federal tax purposes, we have determined that ownership changes occurred in
August 2016 and June 2018. We are still in the process of determining the annual limitation on NOLs as a

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result of such ownership changes. Subsequent ownership changes and changes to the U.S. federal or state or UK tax rules 
in respect of the utilization of NOLs and carryforward tax losses may further affect the limitation in future years.  

General Risk Factors

We may engage in acquisitions that could disrupt our business, cause dilution to our shareholders or reduce our
financial resources.

We have, and may in the future, enter into transactions to acquire other businesses, products or technologies. If we

do identify suitable candidates, we may not be able to make such acquisitions on favorable terms, or at all. Any
acquisitions we make may not strengthen our competitive position, and these transactions may be viewed negatively by
customers or investors. We may decide to incur debt in connection with an acquisition or issue our ordinary shares or other
equity securities to the shareholders of the acquired company, which would reduce the percentage ownership of our
existing shareholders. We could incur losses resulting from undiscovered liabilities of the acquired business that are not
covered by the indemnification we may obtain from the seller. In addition, we may not be able to successfully integrate the
acquired personnel, technologies and operations into our existing business in an effective, timely and nondisruptive
manner. Acquisitions may also divert management attention from day-to-day responsibilities, increase our expenses and
reduce our cash available for operations and other uses. We cannot predict the number, timing or size of future acquisitions
or the effect that any such transactions might have on our operating results.

Exchange rate fluctuations may adversely affect our results of operations and financial condition.

Owing to the international scope of our operations, fluctuations in exchange rates may adversely affect us,

particularly between the U.S. dollar on the one hand, and the pound sterling and euro on the other hand. As a result, our
business and the market price of our securities may be affected by such fluctuations, which may have a significant impact
on our results of operations and cash flows from period to period. Currently, we do not have any exchange rate hedging
arrangements in place.

Our management team has broad discretion as to the use of the net proceeds from public and private equity or debt
financings and the investment of these proceeds may not yield a favorable return. We may invest the proceeds in ways
with which our shareholders disagree.

We have broad discretion in the application of any net proceeds we may receive pursuant to any past or future 

equity or debt financings. Shareholders may not agree with our decisions, and our use of the proceeds and our existing cash 
and cash equivalents may not improve our results of operation or enhance the value of our ordinary shares. Our failure to 
apply these funds effectively could have a material adverse effect on our business, delay the development of our product 
candidates and cause the market price of our ordinary shares to decline. In addition, until the net proceeds are used, they 
may be placed in investments that do not produce significant income or that may lose value.  Additionally, our existing 
cash and cash equivalents are subject to general credit, liquidity, market and interest rate risks, which have been and may, 
in the future, be exacerbated by a U.S. and/or global financial crises.  We may realize losses in the fair value of certain of 
our investments or a complete loss of these investments if the credit markets tighten, which would have an adverse effect 
on our results of operations, liquidity and financial condition.

We incur substantial costs as a result of operating as a public company, and our management is required to devote
substantial time to new compliance initiatives and corporate governance practices.

As a public company, and particularly if we no longer qualify as an emerging growth company and smaller

reporting company in the future, we incur and will continue to incur significant legal, accounting and other expenses that
we did not incur as a private company. The Sarbanes-Oxley Act of 2002, the Dodd-Frank Wall Street Reform and
Consumer Protection Act, The Nasdaq Global Select listing requirements and other applicable securities rules and
regulations impose various requirements on public companies, including establishment and maintenance of effective

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disclosure and financial controls and corporate governance practices. Our management and other personnel need to devote
a substantial amount of time to these compliance initiatives. Moreover, these rules and regulations increase our legal and
financial compliance costs.

Pursuant to Section 404 of the Sarbanes-Oxley Act of 2002, or Section 404, we are required to furnish a report by
our management on our internal control over financial reporting. However, while we remain an emerging growth company,
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, we engage 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, 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 whether such 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 we, or our independent registered public accounting firm if we no longer qualify as an emerging growth company,
will not be able to conclude that our internal control over financial reporting is effective as required by Section 404. In
addition, any testing by us conducted in connection with Section 404, or any subsequent testing by our independent
registered public accounting firm, may reveal deficiencies in our internal controls over financial reporting that are deemed
to be material weaknesses or that may require prospective or retroactive changes to our financial statements or identify
other areas for further attention or improvement. If we identify one or more material weaknesses or determine we have
inadequate internal controls, it could result in an adverse reaction in the financial markets due to a loss of confidence in the
reliability of our financial statements.

If securities or industry analysts cease to publish research or reports about our business, or if they issue an adverse or
misleading opinion regarding our ordinary shares, our share price and trading volume could decline.

The trading market for our ordinary shares relies in part on the research and reports that industry or securities

analysts publish about us or our business. We do not control these analysts. Furthermore, if any of the analysts who cover
us issue an adverse or misleading opinion regarding us, our business model, our intellectual property or our share
performance, or if any of our preclinical studies or clinical trials and operating results fail to meet the expectations of
analysts, our share price would likely decline. If one or more of these analysts ceases coverage of us or fails to publish
reports on us regularly, we could lose visibility in the financial markets, which in turn could cause our share price or
trading volume to decline.

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

Under Cayman Islands law, we may only make distributions by way of dividend out of profits, or out of our share
premium account (provided that immediately following the date that the dividend is proposed to be paid we are able to pay
our debts as they fall due in the ordinary course of business). We have never declared or paid any cash dividends on our
ordinary shares. We currently anticipate that we will retain future earnings for the development, operation and expansion of
our business and do not anticipate declaring or paying any cash dividends for the foreseeable future. As a result, capital
appreciation, if any, of our ordinary shares would be your sole source of gain on an investment in our ordinary shares for
the foreseeable future. See the “Dividend Policy” section of this Form 10-K for the year ended December 31, 2020 for
additional information.

ITEM 1B.

UNRESOLVED STAFF COMMENTS

Not applicable.

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ITEM 2.

PROPERTIES

Our principal office is located at 450 East 29th Street, New York, New York, USA, where we lease 22,721 square 

feet of office and laboratory space.  We lease this office space under a lease that terminates on October 31, 2026.

We also own a long leasehold interest in the ground rights where our 29,000 square foot manufacturing facility is 

located, at 92 Britannia Walk, London, United Kingdom.  The long leasehold interest expires in 2126, and there is no 
facility rent due.

Additionally, we lease an 11,306 square foot office facility located at 34-38 Provost Street, London, United 

Kingdom and 6,679 square feet of laboratory facilities at 15 Ebenezer Street, London, United Kingdom.  The office space 
lease terminates on September 8, 2029 and the laboratory leases terminate on May 24, 2027.

In January 2021, we completed the acquisition of a second cGMP viral vector manufacturing facility and a cGMP

plasmid and DNA production facility located in Buildings 2 and 3, Block K, Airport Avenue, Shannon Free Zone,
Shannon, Ireland. The campus encompasses an aggregate of 150,000 square feet.  We also entered into a lease for each
property providing for a long leasehold interest of approximately 191 years.

ITEM 3.

LEGAL PROCEEDINGS

We are not subject to any material legal proceedings.

ITEM 4.

MINE SAFETY DISCLOSURES

Not applicable.

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PART II

ITEM 5.
AND ISSUER PURCHASES OF EQUITY SECURITIES

MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS

Market Information

On June 8, 2018, our ordinary shares began trading on the Nasdaq Global Select Market under the symbol 

“MGTX.”  Prior to that time, there was no public market for our stock.

Holders of Record

As of March 8, 2021, there were 54 holders of record.  The actual number of shareholders of our ordinary shares 

is greater than this number of record holders and includes shareholders who are beneficial owners but whose ordinary 
shares are held in street name by brokers and other nominees.  This number of holders of record also does not include 
shareholders whose ordinary shares may be held in trust by other entities.

Dividend Policy

We have never declared or paid any cash dividends on our ordinary shares.  We intend to retain future earnings, if 

any, to finance the operation and expansion of our business and do not anticipate paying any cash dividends in the 
foreseeable future.  However, if we do pay a cash dividend on our ordinary shares in the future, we will only pay such 
dividend out of our profits or share premium (subject to solvency requirements) as permitted under Cayman Islands law.

Recent Sales of Unregistered Securities

None.

ITEM 6.

SELECTED FINANCIAL DATA

Not applicable.

ITEM 7.
RESULTS OF OPERATIONS

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

You should read the following discussion and analysis of financial condition and operating results together with
our  financial  statements  and  the  related  notes  appearing  in  this  Form  10-K.    Some  of  the  information  contained  in  this
discussion  and  analysis  or  set  forth  elsewhere  in  this  Form  10-K,  including  information  with  respect  to  our  plans  and
strategy for our business and related financing, includes forward-looking statements that involve risks and uncertainties.
As a result of many important factors, including those set forth in the section of this Form 10-K captioned “Item 1A.  Risk
Factors”  and  elsewhere  in  this  Form  10-K,  our  actual  results  could  differ  materially  from  the  results  described  in,  or
implied  by,  the  forward-looking  statements  contained  in  the  following  discussion  and  analysis.    For  convenience  of
presentation some of the numbers have been rounded in the text below.

Overview

We are a vertically integrated, clinical stage gene therapy company with six programs in clinical development and

a broad pipeline of preclinical and research programs. We have core capabilities in viral vector design and optimization,
gene therapy manufacturing as well as a potentially transformative gene regulation technology. Led by an experienced
management team, we have taken a portfolio approach by licensing, acquiring and developing technologies that give us
depth across both product candidates and indications. Though initially focusing on ophthalmology, salivary

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gland and neurodegenerative disease programs, we intend to expand our focus in the future to develop additional gene
therapy treatments for patients suffering from a range of serious diseases.

We are an exempted company incorporated under the laws of the Cayman Islands in 2018, and prior to that, we

commenced operations as MeiraGTx Limited, a private limited company incorporated under the laws of England and
Wales in 2015. Our discussion of our financial condition and results of operations is based upon our financial statements,
which have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”).
Since our formation, we have devoted substantially all of our resources to developing our technology platform, establishing
our viral vector manufacturing facilities and developing manufacturing processes, advancing the product candidates in our
ophthalmology, salivary gland and neurodegenerative disease programs, building our intellectual property portfolio,
organizing and staffing our company, developing our business plan, raising capital, and providing general and
administrative support for these operations. In 2016, we completed the acquisition of assets held by BRI-Alzan, Inc., a
Delaware corporation, including a worldwide license agreement to develop certain preclinical technology for the treatment
of amyotrophic lateral sclerosis (“ALS”). In October 2018, we acquired Vector Neurosciences, Inc., a Delaware
corporation. In connection with that acquisition, we acquired its rights to the clinical stage gene therapy product candidate
adeno-associated virus encoding glutamic acid decarboxylase (“AAV-GAD”) gene therapy program which had completed a
randomized, sham-controlled Phase 2 study for treatment of Parkinson’s disease. In October 2019, we acquired Arthrogen
B.V., a Netherlands corporation that was renamed MeiraGTx Netherlands B.V., a biopharmaceutical company developing
gene therapy for different indications using viral mediated gene transfer and specializing in the development of viral gene
therapy vectors, in particular adeno-associated virus (AAV-) based therapeutics. In April 2020, we acquired Emrys Bio
Inc., a Delaware corporation that was renamed MeiraGTx Bio Inc., a pre-clinical biopharmaceutical company developing
brain-derived neurotrophic factor gene therapy for treatment of genetic obesity disorders, as well as the development of
gene therapy product candidates for other central nervous system diseases. To date, we have financed our operations
primarily with cash on hand and proceeds from the sales of our Series A ordinary shares, Convertible Preferred C Shares
and ordinary shares. Through December 31, 2020, we received gross proceeds of approximately $446.0 million from sales
of our ordinary shares, Series A ordinary shares and convertible preferred C shares and $100.0 million from the
collaboration, option and license agreement with Janssen Pharmaceuticals, Inc. (“Janssen”), one of the Janssen
Pharmaceuticals Companies of Johnson & Johnson (the “Collaboration Agreement”). As of December 31, 2020, we had
cash and cash equivalents of $209.5 million, as well as $38.5 million in receivables due from Janssen in the first quarter of
2021 in connection with the Collaboration Agreement.

We are a clinical stage company and have not generated any product revenues to date. We have six clinical

programs and a pipeline of preclinical programs. Since inception, we have incurred significant operating losses. Our net
losses for the years ended December 31, 2020 and 2019 were $58.0 million and $54.8 million, respectively. As of
December 31, 2020, we had an accumulated deficit of $261.0 million. We do not expect to generate revenue from sales of
any products for several years, if at all. In March 2019, we received an upfront payment in the amount of $100.0 million
from the Collaboration Agreement. Additionally, pursuant to the Collaboration Agreement, we are eligible to receive
research and development funding and potential milestone payments and royalties.

Our total operating expenses were $78.1 million and $71.6 million for the years ended December 31, 2020 and

2019, respectively. While we expect our operating expenses to increase substantially in connection with our ongoing
development activities related to our product candidates, including the planned advancement of AAV-RPGR into the Phase
3 Lumeos clinical trial for the treatment of patients with XLRP and the initiation of a Phase 3 clinical trial of AAV-RPE65
for the treatment of retinal dystrophy associated with mutations in the RPE65 gene, we believe that certain of these
increases will be partially offset by the research funding in connection with the Collaboration Agreement. In addition to
these planned Phase 3 trials, we anticipate that our expenses will also increase due to costs associated with our clinical
development program targeting achromatopsia due to mutations in the CNGB3 or CNGA3 gene. In addition, we expect to
continue incurring increasing costs associated with our clinical activities for AAV-AQP1 for the treatment of radiation-
induced xerostomia and xerostomia associated with Sjogren’s syndrome. We expect to file an IND application for AAV-
GAD in the third quarter of 2021 following the release of the clinical material manufactured in our

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London cGMP facility. We also incurred expenses during the year ended December 31, 2020 and expect to continue to
incur expenses related to research activities in additional therapeutic areas to expand our pipeline, hiring additional
personnel in manufacturing, research, clinical operations, quality and other functional areas, and associated cash and share-
based compensation expense, as well as the further development of internal manufacturing capabilities and capacity and
other associated costs including the management of our intellectual property portfolio.

As a result of these anticipated expenditures and the acquisition, development and startup of our new Shannon, 

Ireland manufacturing facilities, we raised net proceeds of $81.9 million during the year ended December 31, 2020 from an 
at-the market offering and a public offering of our ordinary shares.  We will require additional capital in the future, which 
we may raise through equity offerings, debt financings, marketing and distribution arrangements and other collaborations, 
strategic alliances and licensing arrangements or other sources to enable us to complete the development and potential 
commercialization of our product candidates. Furthermore, we expect to continue incurring costs associated with being a 
public company. Adequate additional financing may not be available to us on acceptable terms, or at all. Our failure to raise 
capital as and when needed would have a negative effect on our financial condition and our ability to pursue our business 
strategy. In addition, attempting to secure additional financing may divert the time and attention of our management from 
day-to-day activities and harm our product candidate development efforts. 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.

Based on our cash and cash equivalents at December 31, 2020 and the research funding and milestone payments 

we expect to receive under the Collaboration Agreement, we estimate that such funds will be sufficient to enable us to fund 
our operating expenses and capital expenditure requirements into the middle of 2023.  We have based these estimates on 
assumptions that may prove to be wrong, and we may use our available capital resources sooner than we currently expect. 
See “Liquidity and Capital Resources.” Because of the numerous risks and uncertainties associated with the development 
of our product candidates, any future product candidates, our platform and technology and because the extent to which we 
may enter into collaborations with third parties for development of any of our product candidates is unknown, we are 
unable to estimate the amounts of increased capital outlays and operating expenses associated with completing the research 
and development of our product candidates. 

Adequate additional funds may not be available to us on acceptable terms, or at all. To the extent that we raise

additional capital through the sale of equity or convertible securities, your ownership interest will be diluted, and the terms
of these securities may include liquidation or other preferences that adversely affect your rights as a shareholder. Any
future debt financing or preferred equity or other financing, if available, may involve agreements that include covenants
limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or
declaring dividends and may require the issuance of warrants, which could potentially dilute your ownership interests.

If we raise additional funds through collaborations, strategic alliances, or licensing arrangements with third
parties, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or
product candidates or grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds
through equity or debt financings when needed, we may be required to delay, limit, reduce, or terminate our product
development programs or any future commercialization efforts or grant rights to develop and market product candidates
that we would otherwise prefer to develop and market ourselves.

Because of the numerous risks and uncertainties associated with drug development, we are unable to predict the
timing or amount of increased expenses or when or if we will be able to achieve or maintain profitability. Even if we are
able to generate revenue from product sales, we may not become profitable. If we fail to become profitable or are unable to
sustain profitability on a continuing basis, then we may be unable to continue our operations at planned levels and be
forced to reduce or terminate our operations.

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Highlights and Recent Developments

Recent Clinical Development Highlights and Anticipated 2021 Milestones

AAV-AQP1 for the Treatment of Grade 2/3 Radiation-Induced Xerostomia:  

● We reported preliminary data from the Phase 1 AQUAx clinical trial in December 2020.

o Of the three patients treated in Cohort 1, one patient reached the 12-month assessment and two passed
the six-month assessment. In all patients, the investigational gene therapy AAV-hAQP1 has been well
tolerated with no dose limiting toxicity and no serious adverse events reported.

o Encouraging responses have been seen in patient-reported measures of xerostomia symptoms and in

salivary output in the patients treated in Cohort 1.

o Complete resolution of symptoms was observed in the patient who has reached the 12-month timepoint.
● We continue to activate clinical trial sites in our Phase 1 AQUAx study, with two sites re-opened after shutdowns
due to COVID-19, and all five sites are anticipated to be open and enrolling patients in the first half of 2021.

● The single center Phase 1 dose-finding study of AAV-AQP1 at the National Institutes of Health (NIH) also

continues to enroll patients. Enrollment in the fourth dose escalation cohort is now ongoing.

AAV-RPGR for the Treatment of X-Linked Retinitis Pigmentosa (XLRP):  

● We and our development partner Janssen are preparing to initiate the Phase 3 Lumeos clinical trial.
● In 2020, we and Janssen were granted Priority Medicines (PRIME) and Advanced Therapy Medicinal Product

(ATMP) designations for AAV-RPGR.

● In 2020, we and Janssen announced positive 6-, 9- and 12-month data from the Phase 1/2 clinical study

(MGT009) of AAV-RPGR at the American Society of Retina Specialists (ASRS) Annual Meeting, the European
Society of Retina Specialists (EURETINA), and the American Academy of Ophthalmology Annual Meeting:

o Data from each time point demonstrated that patients treated with low and intermediate dose AAV-
RPGR experienced statistically significant improvement in retinal sensitivity. Nine-month data also
indicated significant improvement in vision-guided mobility. At 12-months, six of seven patients
continued to show improved or stable vision in the treated eye.

AAV-GAD for the Treatment of Parkinson’s Disease:

● We anticipate filing an Investigational New Drug application (IND) by the third quarter of 2021, with material
that has been manufactured with our in-house proprietary manufacturing process at our cGMP manufacturing
facility in London.

AAV-RPE65 for the Treatment of RPE65-associated Retinal Dystrophy:

● We anticipate initiating a Phase 3 pivotal trial of AAV-RPE65 in the second half of 2021.

AAV-CNGB3 and AAV-CNGA3 for the Treatment of Achromatopsia (ACHM):  

● We and Janssen continue to advance our ongoing clinical development of AAV-CNGB3 and AAV-CNGA3 for the

treatment of ACHM associated with mutations in the CNGB3 and CNGA3 genes.

o On January 26, 2021 the U.S. Food and Drug Administration (FDA) granted Fast Track designation to
our AAV-CNGA3 gene therapy product candidate for the treatment of ACHM caused by mutations in
the CNGA3 gene.

o We and Janssen have now completed dosing of both adults and pediatric patients in the Phase 1/2 dose

escalation study of AAV-CNGA3 and expect to provide an update on further clinical studies for both
AAV-CNGB3 and AAV-CNGA3 later in 2021.

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Riboswitch Gene Regulation Platform:

● We expect to present in-vivo data from our proprietary riboswitch gene regulation platform in the second half of

2021, demonstrating regulation of multiple therapeutic genes in multiple tissues.

Recent Corporate Development Highlights

Second Viral Vector Manufacturing Facility and Plasmid and DNA Production Facility

● We expanded our industry-leading manufacturing capabilities by acquiring and building a second wholly owned
cGMP viral vector manufacturing facility as well as a cGMP plasmid and DNA production facility located in
Shannon, Ireland.

● The campus encompasses approximately 150,000 square feet serving numerous functions: high capacity cGMP

manufacturing hub, clinical supply storage, QC laboratories for global release, up to ten flexible and scalable viral
vector suites, fully scalable automated fill and finish, an extensive warehouse and a separate internal cGMP
plasmid and DNA manufacturing facility.

● Construction of the cGMP plasmid and DNA manufacturing facility has been completed, with the cGMP viral 

vector manufacturing facility expected to be completed by the end of 2021.  

Expanding Clinical, Regulatory, Manufacturing, MSAT and Preclinical Development Teams

● We continue to increase the number of personnel across key functional areas to support our broad pipeline of

optimized investigational gene therapies. Our team now includes more than 215 full-time employees.

Components of Our Results of Operations

License Revenue

Our license revenue consisted of the amortization of the upfront payment we received in connection with the

Collaboration Agreement.

Operating Expenses

Our operating expenses since inception have consisted primarily of general and administrative costs and research

and development costs.

General and Administrative Expenses

General and administrative expenses consist primarily of salaries and other related costs, including share-based
compensation, for personnel in our executive, finance, legal, business development and administrative functions. General
and administrative expenses also include legal fees relating to intellectual property and corporate matters; professional fees
for accounting, auditing, tax and consulting services; insurance costs; travel expenses; and office facility-related expenses,
which include direct depreciation costs.

We expect that our general and administrative expenses will increase in the future as we increase our personnel

headcount to support increased research and development activities. We have also incurred and expect to continue to incur
increased expenses associated with being a public company, including costs of accounting, audit, legal, regulatory and tax-
related services associated with maintaining compliance with Nasdaq and SEC requirements; director and officer insurance
costs; and investor and public relations costs.

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Research and Development Expenses

Research and development expenses consist primarily of costs incurred for our research activities, including our

discovery efforts, and the development of our product candidates, and include:

● employee-related expenses, including salaries, benefits and travel of our research and development

personnel;

● expenses incurred in connection with third-party vendors that conduct clinical and preclinical studies and

manufacture the drug product for the clinical trials and preclinical activities;

● acquisition of in process research and development;

● costs associated with clinical and preclinical activities including costs related to facilities, supplies, rent,

insurance, certain legal fees, share-based compensation, and depreciation; and

● expenses incurred with the development and operation of our manufacturing facilities.

We expense research and development costs as incurred.

Research and development activities are central to our business model. We expect that our research and
development expenses will continue to increase substantially for the foreseeable future as we initiate additional preclinical
and clinical trials of our existing product candidates, including the planned advancement of AAV-RPGR into the Phase 3
Lumeos clinical trial for the treatment of patients with XLRP and the initiation of a Phase 3 clinical trial of AAV-RPE65
for the treatment of retinal dystrophy associated with mutations in the RPE65 gene, and continue to discover and develop
additional product candidates. Certain of these increases in research and development costs will be partially offset by the
research funding provided in connection with the Collaboration Agreement we entered into in January 2019.

We cannot determine with certainty the duration and costs of future clinical trials of our product candidates or any

other product candidate we may develop or if, when, or to what extent we will generate revenue from the
commercialization and sale of any product candidate for which we obtain marketing approval. We may never succeed in
obtaining marketing approval for any product candidate. The duration, costs and timing of clinical trials and development
of our existing product candidates or any other product candidate we may develop will depend on a variety of factors,
including:

● the scope, rate of progress, expense and results of clinical trials of our existing product candidates, as well as
of any future clinical trials of other product candidates and other research and development activities that we
may conduct;

● uncertainties in clinical trial design and patient enrollment rates;

● the actual probability of success for our product candidates, including the safety and efficacy, early clinical

data, competition, manufacturing capability and commercial viability;

● significant and changing government regulation and regulatory guidance;

● the timing and receipt of any marketing approvals; and

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● the expense of filing, prosecuting, defending and enforcing any patent claims and other intellectual property

rights.

A change in the outcome of any of these variables with respect to the development of a product candidate could

mean a significant change in the costs and timing associated with the development of that product candidate. For example,
if the FDA or another U.S. or foreign regulatory authority were to require us to conduct clinical trials beyond those that we
anticipate will be required for the completion of clinical development of a product candidate, or if we experience
significant delays in our clinical trials due to patient enrollment or other reasons, we would be required to expend
significant additional financial resources and time on the completion of clinical development.

Other non-operating income (expense)

Other non-operating income (expense) includes the following:

Foreign currency (loss) gain

Our consolidated financial statements are presented in U.S. dollars, which is our reporting currency. The financial

position and results of operations of our subsidiaries MeiraGTx UK II Limited, MeiraGTx Ireland DAC, MeiraGTx
Netherlands B.V. and MeiraGTx B.V. are measured using the foreign subsidiaries’ local currency as the functional
currency. These entities’ cash accounts holding U.S. dollars and intercompany payables and receivables are remeasured
based upon the exchange rate at the date of remeasurement with the resulting gain or loss included in the consolidated
statement of operations and comprehensive loss. Expenses of such subsidiaries have been translated into U.S. dollars at
average exchange rates prevailing during the period. Assets and liabilities have been translated at the rates of exchange on
the consolidated balance sheet date. The resulting translation gain and loss adjustments are recorded directly as a separate
component of shareholders’ equity and as other comprehensive loss on the consolidated statement of operations and
comprehensive loss.

Critical Accounting Policies and Use of Estimates

Management’s discussion and analysis of our financial condition and results of operations is based on our

consolidated financial statements, which have been prepared in accordance with GAAP. The preparation of these
consolidated financial statements requires us to make estimates and judgements that affect the reporting amounts of assets,
liabilities and expenses and the disclosure of contingent assets and liabilities in our consolidated financial statements. On
an ongoing basis, we evaluate our estimates and judgements, including those related to license and collaboration revenue,
share-based compensation and accrued expenses. We base our estimates on historical experience, known trends and events
and various other factors that we believe to be reasonable under the circumstances, the results of which form the basis for
making judgements about the carrying value of assets and liabilities that are not readily apparent from our sources. Actual
results may differ from these estimates under different assumptions.

While our significant accounting policies are described in more detail in the notes to our financial statements

appearing in this Form 10-K, we believe that the following accounting policies are those most critical to the judgments and
estimates used in the preparation of our financial statements.

Collaboration Arrangements

We evaluate our collaborative arrangements pursuant to Accounting Standards Codification (“ASC”) 808,

Collaborative Arrangements (“ASC 808”) and ASC 606, Revenue from Contracts with Customers (“ASC 606”). We
consider the nature and contractual terms of collaborative arrangements and assess whether the arrangement involves a
joint operating activity pursuant to which we are an active participant and are exposed to significant risks and rewards with
respect to the arrangement. If we are an active participant and exposed to significant risks and rewards with respect to the
arrangement, we account for the arrangement as a collaboration under ASC 808. To date, we have entered into two

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separate collaboration agreements, both of which are with Janssen, which were determined to be within the scope of ASC
808.

ASC 808 does not address recognition or measurement matters related to collaborative arrangements. Payments

between participants pursuant to a collaborative arrangement that are within the scope of other authoritative accounting
literature on income statement classification are accounted for using the relevant provisions of that literature. If the
payments are not within the scope of other authoritative accounting literature, the income statement classification for the
payments is based on an analogy to authoritative accounting literature or if there is no appropriate analogy, a reasonable,
rational and consistently applied accounting policy election. Payments received from a collaboration partner to which this
policy applies may include upfront payments in respect of a license of intellectual property, development and
commercialization-based milestones, and royalties.

Revenue Recognition

Arrangements with collaborators may include licenses to intellectual property, research and development services,
manufacturing services for clinical and commercial supply, and participation on joint steering committees. We evaluate the
promised goods or services to determine which promises, or group of promises, represent performance obligations. In
contemplation of whether a promised good or service meets the criteria required of a performance obligation, we consider
the stage of development of the underlying intellectual property, the capabilities and expertise of the customer relative to
the underlying intellectual property, and whether the promised goods or services are integral to or dependent on other
promises in the contract. When accounting for an arrangement that contains multiple performance obligations, we must
develop judgmental assumptions, which may include market conditions, reimbursement rates for personnel costs,
development timelines and probabilities of regulatory success to determine the stand-alone selling price for each
performance obligation identified in the contract.

When we conclude that a contract should be accounted for as a combined performance obligation and recognized

over time, we must then determine the period over which revenue should be recognized and the method by which to
measure revenue. We generally recognize revenue using a cost-based input method.

The Collaboration Agreement is accounted for under ASC 808, however, as ASC 808 does not address
recognition or measurement matters such as determining the appropriate unit of accounting or when the recognition criteria
are met, we account for the consideration received from Janssen in accordance with ASC 606. In accordance with ASC
606, we recognize revenue when the customer or collaborator obtains control of promised goods or services, in an amount
that reflects the consideration which we expect to receive in exchange for those goods or services. To determine revenue
recognition for arrangements that we determine are within the scope of ASC 606, we perform the following five steps:

i.

identify the contract(s) with a customer;

ii.

identify the performance obligations in the contract;

iii. determine the transaction price;

iv. allocate the transaction price to the performance obligations within the contract; and

v.

recognize revenue when (or as) the entity satisfies a performance obligation.

We only apply the five-step model to contracts when we determine that it is probable we will collect the

consideration we are entitled to in exchange for the goods or services we transfer to the customer.

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At contract inception, once the contract is determined to be by analogy within the scope of ASC 606, we assess
the goods or services promised within the contract to determine whether each promised good or service is a performance
obligation. The promised goods or services for our arrangements typically consist of a license to our intellectual property
and research, development and manufacturing services. We may provide options to additional items in such arrangements,
which are accounted for as separate contracts when the customer elects to exercise such options, unless the option provides
a material right to the customer. Performance obligations are promises in a contract to transfer a distinct good or service to
the customer that (i) the customer can benefit from on its own or together with other readily available resources, and (ii) is
separately identifiable from other promises in the contract. Goods or services that are not individually distinct performance
obligations are combined with other promised goods or services until such combined group of promises meet the
requirements of a performance obligation.

We determine transaction prices based on the amount of consideration we expect to receive for transferring the
promised goods or services in the contract. Consideration may be fixed, variable, or a combination of both. At contract
inception for arrangements that include variable consideration, we estimate the probability and extent of consideration we
expect to receive under the contract utilizing either the most likely amount method or expected amount method, whichever
best estimates the amount expected to be received. We then consider any constraints on the variable consideration and
include in the transaction price variable consideration to the extent it is deemed probable that a significant reversal in the
amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is
subsequently resolved.

We then allocate the transaction price to each performance obligation based on the relative standalone selling price

and recognize as revenue the amount of the transaction price that is allocated to the respective performance obligation
when (or as) control is transferred to the customer and the performance obligation is satisfied. For performance obligations
which consist of licenses and other promises, we utilize judgment to assess the nature of the combined performance
obligation to determine whether the combined performance obligation is satisfied over time or at a point in time and, if
over time, the appropriate method of measuring progress. We evaluate the measure of progress each reporting period and, if
necessary, adjust the measure of performance and related revenue recognition.

We record amounts as accounts receivable when the right to consideration is deemed unconditional. When

consideration is received, or such consideration is unconditionally due, from a customer prior to transferring goods or
services to the customer under the terms of a contract, a contract liability is recorded as deferred revenue.

Amounts received prior to satisfying the revenue recognition criteria are recognized as deferred revenue in our
consolidated balance sheet. Amounts expected to be recognized as revenue within the 12 months following the balance
sheet date are classified as deferred revenue – related party, current. Amounts not expected to be recognized as revenue
within the 12 months following the balance sheet date are classified as deferred revenue – related party.

Income Taxes

Since we have recurring losses and a valuation allowance against deferred tax assets, there was no tax expense 

(benefit) for the years ended December 31, 2020 and 2019.  

As of December 31, 2020, we had federal and state net operating losses (“NOLs”) in the United States of 

approximately $34.7 million and $34.4 million, respectively, and carryforward tax losses in the UK of approximately 
$142.2 million and in the Netherlands of approximately $26.1 million, which are available to reduce future taxable income.  
The U.S. federal and state NOLs incurred prior to January 1, 2018 in the amount of approximately $6.8 million and $6.7 
million, respectively, will begin to expire in 2036.  The U.S. NOLs incurred after December 31, 2017 and the UK 
carryforward tax losses will be indefinitely carried forward.  The Netherlands carryforward tax losses expire after nine 
years from the date incurred prior to 2019 and six years for tax losses incurred after 2018.  As of December 31, 2020, we 
also had orphan drug and research and development credits in the U.S. in the amount of $5.1 million, which 

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will begin to expire 2036 and research and development credits in the UK in the amount of $1.2 million, which can be 
carried forward indefinitely.

Leases

We account for leases in accordance with ASC 842. We determine if an arrangement is a lease at contract
inception. A lease exists when a contract conveys the right to control the use of identified property, plant, or equipment for
a period of time in exchange for consideration. The definition of a lease embodies two conditions: (1) there is an identified
asset in the contract that is land or a depreciable asset (i.e., property, plant, and equipment), and (2) we have the right to
control the use of the identified asset. We account for the lease and non-lease components as a single lease component.

From time to time we enter into direct financing lease arrangements that include a lessee obligation to purchase

the leased asset at the end of the lease term, a bargain purchase option, or provides for minimum lease payments with a
present value of 90% or more of the fair value of the leased asset at the date of lease inception.

Operating leases where we are the lessee are included in right-of-use (“ROU”) assets and lease obligations are

included on our consolidated balance sheets. The lease obligations are initially and subsequently measured at the present
value of the unpaid lease payments at the lease commencement date and subsequent reporting periods.

Finance leases where we are the lessee are included in ROU assets and lease obligations on our consolidated

balance sheets. The lease obligations are initially measured in the same manner as for operating leases and are
subsequently measured at amortized cost using the effective interest method.

Key estimates and judgments include how we determined (1) the discount rate we use to discount the unpaid lease

payments to present value, (2) lease term and (3) lease payments.

ASC 842 requires a lessee to discount its unpaid lease payments using the interest rate implicit in the lease or, if

that rate cannot be readily determined, its incremental borrowing rate. As most of our leases where we are the lessee do not
provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date
in determining the present value of lease payments. Our incremental borrowing rate for a lease is the rate of interest we
would have to pay on a collateralized basis to borrow an amount equal to the lease payments under similar terms. We use
the implicit rate when readily determinable.

The lease term for all of our leases includes the non-cancellable period of the lease plus any additional periods
covered by either a lessee option to extend (or not to terminate) the lease that is reasonably certain to be exercised, or an
option to extend (or not to terminate) the lease controlled by the lessor.

The ROU asset is initially measured at cost, which comprises the initial amount of the lease liability adjusted for

lease payments made at or before the lease commencement date less any lease incentives received.

For operating leases, the ROU asset is subsequently measured throughout the lease term at the carrying amount of

the lease liability, minus any accrued lease payments, less the unamortized balance of lease incentives received. Lease
expense for lease payments is recognized on a straight-line basis over the lease term.

For finance leases, the ROU asset is subsequently amortized using the straight-line method from the lease
commencement date to the earlier of the end of its useful life or the end of the lease term unless the lease transfers
ownership of the underlying asset to us, or we are reasonably certain to exercise an option to purchase the underlying asset.
In those cases, the ROU asset is amortized over the useful life of the underlying asset. Amortization of the ROU asset is
recognized and presented separately from interest expense on the lease liability.

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We have elected not to recognize ROU assets and lease liabilities for all short-term leases that have a lease term of

12 months or less at lease commencement. We recognize the lease payments associated with our short-term leases as an
expense on a straight-line basis over the lease term.

Research and Development

Research and development costs are charged to expense as incurred.  These costs include, but are not limited to, 

employee-related expenses, including salaries, benefits and travel of our research and development personnel; expenses 
incurred under agreements with contract research organizations and investigative sites that conduct clinical and preclinical 
studies and manufacture the drug product for the clinical studies and preclinical activities; acquisition of in-process 
research and development; facilities; supplies; rent, insurance, certain legal fees, stock-based compensation, depreciation 
and other costs associated with clinical and preclinical activities and regulatory operations.  Research funding under 
collaboration agreements and refundable research and development credits / tax credits received are recorded as an offset to 
these costs.

Costs for certain development activities, such as outside research programs funded by us, are recognized based on 
an evaluation of the progress to completion of specific tasks with respect to their actual costs incurred.  Payments for these 
activities are based on the terms of the individual arrangements, which may differ from the pattern of costs incurred, and 
are reflected in the financial statements as prepaid or accrued research and development expense, as the case may be.

Share-Based Compensation

Options

We grant share options to employees, non-employee members of our board of directors and non-employee 

consultants as compensation for services performed.  Employee and non-employee members of the board of directors’ 
awards of share-based compensation are accounted for in accordance with ASC 718, Compensation—Stock Compensation, 
or ASC 718.  ASC 718 requires all share-based payments to employees and non-employee directors, including grants of 
share options, to be recognized in the statement of operations and comprehensive loss based on their grant date fair values.  
The grant date fair value of share options is estimated using the Black-Scholes option valuation model.

Using this model, fair value is calculated based on assumptions with respect to (i) the fair value of our ordinary

shares on the grant date; (ii) expected volatility of our ordinary share price, (iii) the periods of time over which employees
and members of our board of directors are expected to hold their options prior to exercise (expected term), (iv) expected
dividend yield on our ordinary shares, and (v) risk-free interest rates.

Our ordinary shares were not traded on a public exchange prior to our IPO in June 2018.  Therefore, we believe 
that our future volatility will differ materially during the expected term from the volatility that would be calculated from 
our historical share prices to date.  Consequently, expected volatility is based on an analysis of guideline companies in 
accordance with ASC 718.  The expected dividend yield is zero as we have never paid dividends and do not currently 
anticipate paying any in the foreseeable future.  Risk-free interest rates are based on quoted U.S. Treasury rates for 
securities with maturities approximating the option’s expected term.

Restricted Share Units

The Company grants restricted share units (“RSUs”) to employees and non-employee consultants as
compensation for services performed. Awards of RSUs are accounted for in accordance with ASC 718, Compensation -
Stock Compensation, or ASC 718. ASC 718 requires all share-based payments to employees and non-employee directors,
including grants of RSUs, to be recognized in the consolidated statement of operations and comprehensive loss

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based on their grant date fair values. The grant date fair value of RSUs is determined using the closing market price of the
Company’s ordinary shares on the date of grant.

Restricted Shares

In connection with certain employment, service and research agreements, we have granted restricted ordinary 

shares as compensation.  The shares are recognized in the statement of operations and comprehensive loss based on their 
grant date fair values.  Compensation cost relating to share grants with service-based graded vesting schedules is 
recognized based on the vesting schedule.

Results of Operations

Comparison of the Years Ended December 31, 2020 and 2019

License revenue - related party
Operating expenses:

General and administrative
Research and development

Total operating expenses

Loss from operations
Other non-operating income (expense)

Foreign currency gain
Interest income
Interest expense

Net loss
Other comprehensive income:
Foreign currency translation for the years ended December
31, 2020 and 2019, respectively
Total comprehensive loss

License Revenue

2020

2019

$

 15,562,985

$

 13,291,956

$

 44,206,921
 33,910,481
 78,117,402
 (62,554,417)

 3,426,152
 1,275,464
 (139,203)
 (57,992,004)

 46,684,297
 24,875,659
 71,559,956
 (58,268,000)

 3,199,774
 370,603
 (48,612)
 (54,746,235)

Change
 2,271,029

 (2,477,376)
 9,034,822
 6,557,446
 (4,286,417)

 226,378
 904,861
 (90,591)
 (3,245,769)

 (3,102,864)
$  (61,094,868)

 (2,087,708)
$  (56,833,943)

$

 (1,015,156)
 (4,260,925)

License revenue was $15.6 million for the year ended December 31, 2020, compared to $13.3 million for the year

ended December 31, 2019. This increase represents the increased amortization of the $100.0 million upfront payment
received in connection with the Collaboration Agreement.

General and Administrative Expenses

General and administrative expenses were $44.2 million for the year ended December 31, 2020, compared to
$46.7 million for the year ended December 31, 2019.  The decrease of $2.5 million was primarily due to a decrease in 
payroll and payroll related costs of $6.9 million and travel expenses of $1.0 million, which was partially offset by increases 
in insurance of $2.3 million, share-based compensation of $1.5 million, rent of $1.1 million, professional fees of $0.2 
million and $0.3 in other general and administrative expenses.

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Research and Development Expenses

Research and development expenses for the years ended December 31, 2020 and 2019 were as follows (in

millions):

Gross research and development expenses
Janssen reimbursements
Tax incentive reimbursement
Research and development expenses

2020

2019

Change

    $

$

 96.6     $
 (57.4)
 (5.3)
 33.9

$

 65.0     $
 (28.1)
 (12.0)
 24.9

$

 31.6
 (29.3)
 6.7
 9.0

Gross research and development expenses for the year ended December 31, 2020 increased $31.6 million as

compared to the prior year primarily due to an increase in manufacturing of our clinical trial materials of $12.2 million,
payroll and payroll related costs of $8.3 million, acquired research and development of $7.7 million, depreciation of $1.4
million, rent and facility costs of $1.2 million and share-based compensation of $1.0 million, which was partially offset by
a decrease in research and clinical trial costs related to our ophthalmology and salivary gland programs of $1.2 million.

Reimbursements under the Collaboration Agreement for the year ended December 31, 2020 increased $29.3

million as compared to the prior year primarily due to an increase in activity in the programs licensed under the
Collaboration Agreement.

Tax incentive reimbursement for the year ended December 31, 2020 decreased $6.7 million as compared to the 

prior year primarily due to the 2018 and 2019 UK refundable research and development credit being recorded in 2019.  In 
2020, only the 2020 UK refundable research and development credit was recorded.

Foreign Currency Gain

Foreign currency gain was $3.4 million for the year ended December 31, 2020 compared to a gain of $3.2 million

for the year ended December 31, 2019.  The change of $0.2 million was primarily due to a strengthening of the pound 
sterling and euro against the U.S. dollar in 2020.

Interest Income

Interest income was $1.3 million for the year ended December 31, 2020 compared to $0.4 million for the year 

ended December 31, 2019.  The increase was due to a higher average cash balance during 2020 and a reallocation of funds 
into an account earning a higher interest rate.

Liquidity and Capital Resources

Since our inception, we have incurred significant operating losses. For the year ended December 31, 2020, we

used $64.0 million in cash flows from operations. We did not generate positive cash flows from operations during the year
and there are no assurances that we will generate positive cash flows in the future. Additionally, there are no assurances
that we will be successful in obtaining an adequate level of financing for the development and commercialization of our
product candidates. We expect to incur significant expenses and operating losses for the foreseeable future as we advance
the preclinical and clinical development of our product candidates. We expect that our research and development and
general and administrative costs will increase in connection with conducting preclinical studies and clinical trials for our
product candidates, building out internal capacity to have products manufactured to support preclinical studies and clinical
trials, expanding our intellectual property portfolio, and providing general and administrative support for our operations. In
addition, on August 4, 2020 we entered into agreements to acquire our

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second cGMP viral vector manufacturing facility and our first cGMP plasmid and DNA production facility in Shannon,
Ireland to expand our manufacturing and supply chain capabilities. We closed on the acquisition of the first building in
August 2020 and closed on the second building in January 2021. As a result of these incurred and expected expenses, we
raised additional funds during the year ended December 31, 2020 as further described below, and will need to raise
additional capital in the future to fund our operations, which we may obtain from additional equity or debt financings,
collaborations, licensing arrangements, or other sources.

We do not currently have any approved products and have never generated any revenue from product sales. We

have historically financed our operations primarily through cash on hand and proceeds from the sale of our ordinary shares,
series A ordinary shares and convertible preferred C shares. In March 2019, we received $100.0 million in connection with
the Collaboration Agreement, which also provides us with research funding, and we are eligible to receive potential
milestone payments and royalties.

Based on our current cash and cash equivalents at December 31, 2020 and the research funding and milestone

payments we expect to receive under the Collaboration Agreement, we estimate that we will be able to fund our operating
expenses and capital expenditure requirements into the middle of 2023. We have based these estimates on assumptions that
may prove to be wrong, and we could utilize our available capital resources sooner than we expect.

Cash Flows

We had $209.5 million and $227.4 million of cash, cash equivalents and restricted cash as of December 31, 2020

and 2019, respectively.

The following table summarizes our sources and uses of cash for the period presented:

Net cash (used in) provided by operating activities
Net cash used in investing activities
Net cash provided by financing activities
(Decrease) increase in cash

Operating Activities

For the years ended December 31, 

2020

2019

    $ (63,967,799)    $  20,044,897     

   (37,020,433)
 82,727,383
$ (18,260,849)

 (9,370,081)
   148,234,904
$  158,909,720

During the year ended December 31, 2020, our cash used in operating activities of $64.0 million was primarily
due to our net loss of $58.0 million as we incurred expenses associated with research activities on our clinical programs,
manufacturing of our clinical trial materials, preclinical research programs and general and administrative expenses. The
net loss included non-cash charges of $26.7 million, which consisted of $7.7 million for acquired research and
development, $18.4 million of share-based compensation, $3.4 million of a foreign currency gain and $4.1 million of
depreciation and amortization. Additionally, operating assets, consisting of accounts receivable-related party, prepaid
expenses, tax incentive receivable, security deposits and other current assets, increased by $20.8 million and operating
liabilities, consisting of accounts payable, accrued expenses, and deferred revenue-related party, decreased by $11.9
million.

During the year ended December 31, 2019, our cash provided by operating activities of $20.0 million was

primarily due to our receipt of a $100.0 million upfront payment received from the Collaboration Agreement, which was
partially offset by a net loss of $54.8 million as we incurred expenses associated with research activities on our clinical
programs and research activities for our other product candidates and incurred general and administrative expenses. The
net loss included non-cash charges of $4.8 million, which consisted of $16.0 million of share-based compensation,
$2.0 million for shares issued in connection with license agreements, depreciation of $2.2 million and lease obligations of
$1.1 million, which was partially offset by a foreign currency gain of $3.2 million. Additionally, operating assets,

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consisting of accounts receivable, prepaid expenses, tax incentive receivable, security deposits and other current assets,
increased by $35.5 million and operating liabilities, consisting of accounts payable, accrued expenses, and deferred
revenue, increased by $92.2 million.

Investing Activities

Net cash used in investing activities for the year ended December 31, 2020 of $37.0 million consisted primarily of

$14.0 million in payments for the acquisition of the first building and long-term lease for our manufacturing facilities in
Ireland, $2.1 million for the purchase of an intangible asset and $20.9 million for purchases of property and equipment for
our manufacturing, laboratory and process development facilities and buildout costs of our facilities in the UK and Ireland.

Net cash used in investing activities for the year ended December 31, 2019 of $9.4 million consisted primarily of

purchases of property and equipment for our manufacturing, laboratory and process development facilities and buildout
costs of our new facilities in the UK.

Financing Activities

Net cash provided by financing activities was $82.7 million for the year ended December 31, 2020, which
consisted primarily of gross proceeds of $87.0 million from an at-the market offering and a public offering of our ordinary
shares, which was offset by $5.1 million in offering costs, as well as $0.8 million from the exercise of share options.

Net cash provided by financing activities was $148.2 million for the year ended December 31, 2019, which

consisted primarily of gross proceeds of $155.2 million from a private placement and a public offering of our ordinary
shares, which was offset by $7.5 million in offering costs.

Off-Balance Sheet Arrangements

We have not entered into any off-balance sheet arrangements under applicable SEC rules and do not have any

holdings in variable interest entities.

Emerging Growth Company Status

The Jumpstart Our Business Startups Act of 2012, (the “JOBS Act”), permits an “emerging growth company,”

which we are, to take advantage of an extended transition period to comply with new or revised accounting standards
applicable to public companies until those standards would otherwise apply to private companies. We have elected to take
advantage of this extended transition period.

ITEM 7A.

QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

We are exposed to market risks in the ordinary course of our business.  These risks primarily include foreign 

currency exchange rate sensitivities and interest rate risk.

We currently operate in the United States, the United Kingdom, Ireland and the Netherlands.  Our activities in 

these countries expose us to currency exchange rate fluctuations primarily between the U.S. Dollar and the British Pound 
Sterling and Euro.  When the U.S. Dollar strengthens against these currencies, the U.S. Dollar value of non-U.S. Dollar 
based losses increases.  To the extent that our international activities recorded in local currencies increase in the future, our 
exposure to fluctuations in currency exchange rates will correspondingly increase. With respect to our foreign currency 
exposures as of December 31, 2020, a 10% unfavorable movement in foreign currency exchange rates would 

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not expose us to a significant increase in net loss. We have not engaged in derivative financial instruments as a means of
hedging this financial statement risk.

We had cash and cash equivalents of $209.5 million as of December 31, 2020, which consist of non-interest-

bearing and interest-bearing bank deposits.  Other than accounts payable and accrued expenses incurred in the ordinary 
course of business, we had no other debt outstanding as of December 31, 2020.  We had cash, cash equivalents and 
restricted cash of $227.4 million as of December 31, 2019, which consisted of non-interest-bearing and interest-bearing 
bank deposits.  Such interest-earning instruments carry a degree of interest rate risk; however, historical fluctuations in 
interest income have not been significant for us.

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ITEM 8.

FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
FOR THE YEARS ENDED DECEMBER 31, 2020 AND 2019
INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

Report of Independent Registered Public Accounting Firm

Consolidated:

Balance Sheets
Statements of Operations and Comprehensive Loss
Statements of Shareholders' Equity
Statements of Cash Flows
Notes to Consolidated Financial Statements

F-1

F-2

F-3
F-4
F-5
F-5
F-6

Table of Contents

Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Directors of MeiraGTx Holdings plc and Subsidiaries

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of MeiraGTx Holdings plc and Subsidiaries (the
Company) as of December 31, 2020 and 2019, the related consolidated statements of operations and comprehensive loss,
shareholders' equity and cash flows for each of the two years in the period ended December 31, 2020, and the related notes
(collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements
present fairly, in all material respects, the financial position of the Company at December 31, 2020 and 2019, and the
results of its operations and its cash flows for each of the two years in the period ended December 31, 2020, in conformity
with U.S. generally accepted accounting principles.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion
on the Company’s financial statements based on our audits. We are a public accounting firm registered with the Public
Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the
Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and
Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and
perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement,
whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its
internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control
over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company's internal
control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether
due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test
basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the
accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of
the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 2016.

Stamford, Connecticut
March 11, 2021

F-2

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS

December 31, 
2020

December 31, 
2019

ASSETS

CURRENT ASSETS:
Cash and cash equivalents
Accounts receivable - related party
Prepaid expenses
Tax incentive receivable
Other current assets

Total Current Assets

Property and equipment, net
Intangible assets, net
In-process research and development
Security deposits
Restricted cash
Other assets
Right-of-use assets
TOTAL ASSETS

LIABILITIES AND SHAREHOLDERS' EQUITY

CURRENT LIABILITIES:
Accounts payable
Accrued expenses
Lease obligations, current
Deferred revenue - related party, current
Other current liabilities

Total Current Liabilities

Deferred revenue - related party
Lease obligations
Asset retirement obligations
Deferred income tax liability
TOTAL LIABILITIES

COMMITMENTS

SHAREHOLDERS' EQUITY:
Ordinary Shares, $0.00003881 par value, 1,288,327,750 
authorized, 44,189,150 and 36,791,906 shares issued and
outstanding at December 31, 2020 and 2019, respectively
Capital in excess of par value
Accumulated other comprehensive loss
Accumulated deficit

Total Shareholders' Equity
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY

$

$

$

$

209,520,355
38,479,371
7,081,747
12,930,062
4,564,441
272,575,976

44,041,903
2,119,011
852,085
812,344
—
213,722
43,082,359
363,697,400

7,134,204
20,860,820
2,582,999
23,544,583
24,453
54,147,059

49,297,194
19,665,841
1,814,338
213,722
125,138,154

1,716
504,482,392
(4,896,906)
(261,027,956)
238,559,246
363,697,400

$

$

$

$

227,233,384
23,337,377
4,464,085
11,974,437
1,970,585
268,979,868

23,858,108
—
777,655
951,138
123,376
195,053
29,002,448
323,887,646

3,759,339
18,083,757
1,674,210
25,678,515
—
49,195,821

60,535,576
21,504,340
1,654,755
195,053
133,085,545

1,429
395,630,666
(1,794,042)
(203,035,952)
190,802,101
323,887,646

See Notes to Consolidated Financial Statements

F-3

    
    
 
   
  
 
   
  
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

For the Year Ended December 31, 
2019

2020

License revenue - related party

$

15,562,985

$

13,291,956

Operating expenses:

General and administrative
Research and development

Total operating expenses
Loss from operations
Other non-operating income (expense):

Foreign currency gain
Interest income
Interest expense

Net loss
Other comprehensive loss:
Foreign currency translation
Total comprehensive loss
Net loss
Basic and diluted net loss per ordinary share
Weighted-average number of ordinary shares outstanding

44,206,921
33,910,481
78,117,402
(62,554,417)

3,426,152
1,275,464
(139,203)
(57,992,004)

$
$
$

(3,102,864)
(61,094,868) $
(57,992,004) $
(1.54) $

37,724,189

46,684,297
24,875,659
71,559,956
(58,268,000)

3,199,774
370,603
(48,612)
(54,746,235)

(2,087,708)
(56,833,943)
(54,746,235)
(1.65)
33,161,860

See Notes to Consolidated Financial Statements

F-4

    
    
 
 
 
 
 
 
 
 
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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
FOR THE YEARS ENDED DECEMBER 31, 2020 AND 2019

Ordinary
Shares

     Amount     

Capital in Excess
of Par Value

Accumulated Other
Comprehensive
Income (Loss)

Accumulated
Deficit

Total
Shareholders'
Equity

Balance at January 1, 2019
Issuance of shares in connection with a license agreement
Issuance of shares in connection with public and private placements,
net of issuance costs of $7,497,852
Issuance of shares in connection with payables
Exercise of share options
Share-based compensation
Foreign currency translation
Net loss for the year ended December 31, 2019
Balance at December 31, 2019
Issuance of shares in connection with asset acquisition
Issuance of shares in at-the-market offering, net of issuance costs of
$505,650
Issuance of shares in connection with public placement, net of
issuance costs of $4,635,362
Exercise of share options
Share-based compensation
Foreign currency translation
Net loss for the year ended December 31, 2020
Balance at December 31, 2020

27,386,632
158,832

$ 1,064
6

$

229,054,460
1,966,334

$

8,997,102
19,807
134,533
95,000

349
1
5
4

147,701,806
421,499
557,601
15,928,966

—  
—  

—  
—  

—  
—  

36,791,906
544,500

1,429
21

395,630,666
7,684,980

993,448

39

12,657,497

5,750,000
109,296
—
—  
—  

223
4
—
—  
—  
$

69,251,915
840,754
18,416,580

—  
—  
$

504,482,392

44,189,150

$ 1,716

See Notes to Consolidated Financial Statements

F-5

293,666

$ (148,289,717)

$ 81,059,473
1,966,340

—  

—  

—  
—  
—  
—  

(2,087,708)

(1,794,042)

—  

—  

—  
—  
—
(3,102,864)

—  

(54,746,235)
  (203,035,952)

—  

(57,992,004)
$ (261,027,956)

(4,896,906)

—   147,702,155
421,500
—  
557,606
—  
15,928,970
—  
(2,087,708)
—  
(54,746,235)
  190,802,101
7,685,001

—  

—  

12,657,536

—  
—  
—
—  

69,252,138
840,758
18,416,580
(3,102,864)
(57,992,004)
$ 238,559,246

    
    
    
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS

Cash flows from operating activities:

Net loss
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:

Ordinary shares issued in connection with license agreement
Share-based compensation expense
Foreign currency gain
Depreciation and amortization
Net change in right-of-use assets and liabilities
Loss on disposal of equipment, furniture and fixtures
Gain on termination of lease liability
Amortization of interest on asset retirement obligations
Issuance of shares in connection with asset acquisition

(Increase) decrease in operating assets:
Accounts receivable - related party
Prepaid expenses
Tax incentive receivable
Other current assets
Security deposits

Increase (decrease) in operating liabilities:

Accounts payable
Accrued expenses
Other current liabilities
Deferred revenue - related party

Net cash (used in) provided by operating activities

Cash flows from investing activities:

Purchase of property and equipment
Payment for right of use asset
Purchase of intangible asset
Purchase of Arthrogen, net of acquired cash

Net cash used in investing activities

Cash flows from financing activities:

Payments on lease obligations - financing leases
Exercise of share options
Proceeds from the issuance of ordinary shares
Issuance costs in connection with ordinary shares

Net cash provided by financing activities

Net (decrease) increase in cash, cash equivalents and restricted cash
Effect of exchange rate changes on cash
Cash, cash equivalents and restricted cash at beginning of year
Cash, cash equivalents and restricted cash at end of year

Supplemental disclosure of non-cash transactions:

Issuance of shares in connection with asset acquisition
Issuance of shares in connection with a license agreement
Fixed asset acquisition included in accounts payable and accrued expenses at end of period
Issuance of shares in connection with payables
Right-of-use assets obtained in exchange for lease liabilities
Reclassification of property and equipment to right-of-use asset
Asset retirement obligations in connection with a lease

Supplemental disclosure of cash flow information:

Cash paid for interest

$

$
$
$
$
$
$
$

$

See Notes to Consolidated Financial Statements

F-5

For the Year Ended December 31, 

2020

2019

$

(57,992,004)

$

(54,746,235)

—
18,416,580
(3,426,152)
4,171,626
(387,180)
212,994
(143,590)
136,069
7,685,001

(15,401,913)
(2,366,269)
(714,672)
(2,520,087)
164,183

1,565,763
2,171,273
23,564
(15,562,985)
(63,967,799)

(20,923,556)
(13,968,492)
(2,128,385)
—
(37,020,433)

(23,049)
840,758
87,050,686
(5,141,012)
82,727,383

(18,260,849)
424,444
227,356,760
209,520,355

7,685,001
—
1,615,127
—
1,889,065
—
—

3,134

$

$
$
$
$
$
$
$

$

1,966,334
15,928,970
(3,199,774)
2,238,560
1,107,805
—
—
20,621
—

(23,886,573)
(2,259,984)
(8,401,283)
(178,805)
(796,753)

(8,681)
6,518,766
—
85,741,929
20,044,897

(8,980,425)
—
—
(389,656)
(9,370,081)

(24,857)
557,606
155,200,007
(7,497,852)
148,234,904

158,909,720
243,489
68,203,551
227,356,760

—
1,966,334
1,519,454
421,500
23,324,609
7,409,789
1,501,290

1,462

    
    
 
   
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.    Principal Business Activity

The Company

MeiraGTx Holdings plc and subsidiaries (the “Company” or “Meira Holdings”), an exempted company incorporated
under the laws of the Cayman Islands, is a vertically integrated, clinical stage gene therapy company with six
programs in clinical development and a broad pipeline of preclinical and research programs. The Company has core
capabilities in viral vector design and optimization and gene therapy manufacturing, as well as a potentially
transformative gene regulation technology. Led by an experienced management team, the Company has taken a
portfolio approach by licensing, acquiring and developing technologies that give depth across both product candidates
and indications. The Company’s initial focus is on three distinct areas of unmet medical need: ocular diseases,
including inherited retinal diseases as well as large degenerative diseases, neurodegenerative diseases and severe forms
of xerostomia. Though initially focusing on the eye, central nervous system and salivary gland, the Company intends
to expand its focus in the future to develop additional gene therapy treatments for patients suffering from a range of
serious diseases. The Company also owns and operates a current good manufacturing practices, or cGMP, multi-
product, multi-viral vector manufacturing facility in London, United Kingdom (“UK”), which includes fill and finish
capabilities and can supply the Company’s clinical and potential commercial material. Additionally, on August 4,
2020, the Company entered into agreements to acquire its second cGMP viral vector manufacturing facility and its
first cGMP plasmid and DNA production facility in Shannon, Ireland to expand its manufacturing and supply chain
capabilities. The Company closed on the acquisition of the first building in August 2020 and closed on the acquisition
of the second building in January 2021.

Acquisitions

On April 9, 2020, the Company acquired Emrys Bio Inc. (“Emrys”), a pre-clinical biopharmaceutical company
developing brain-derived neurotrophic factor gene therapy for treatment of genetic obesity disorders, as well as the
development of gene therapy product candidates for other central nervous system diseases. Emrys was renamed
MeiraGTx Bio, Inc.

On October 17, 2019, the Company acquired 100% of the outstanding equity of Arthrogen B.V. (“Arthrogen”),
biopharmaceutical company developing gene therapy for different indications, using viral mediated gene transfer.
Arthrogen specializes in the development of viral gene therapy vectors, in particular adeno-associated virus (AAV-)
based therapeutics. Arthrogen was renamed MeiraGTx Netherlands B.V.

These acquisitions are part of the Company’s continuing efforts to expand its focus to develop additional gene therapy
treatments for patients suffering from a range of serious diseases. (See Note 3 for additional information).

Basis of Presentation

The accompanying consolidated financial statements have been prepared in conformity with accounting principles
generally accepted in the United States of America (“GAAP”). Any reference in these notes to applicable guidance is
meant to refer to the authoritative United States generally accepted accounting principles as found in the Accounting
Standards Codification (“ASC”) and Accounting Standards Update (“ASU”) of the Financial Accounting Standards
Board (“FASB”).

Liquidity

The Company has not yet achieved profitable operations. There is no assurance that profitable operations, if ever
achieved, could be sustained on a continuing basis. In addition, development activities, clinical and preclinical testing,
and commercialization of the Company’s product candidates will require significant additional financing. The
Company’s accumulated deficit at December 31, 2020 totaled $261,027,956, and management expects to incur

F-6

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

substantial losses in future periods. The success of the Company is subject to certain risks and uncertainties, including
among others, uncertainty of product development; competition in the Company’s field of use; uncertainty of capital
availability; uncertainty in the Company’s ability to enter into agreements with collaborative partners; expanding and
protecting the Company’s intellectual property portfolio; dependence on third parties; dependence on key personnel;
the COVID-19 pandemic and mitigation measures. For the year ended December 31, 2020, the Company used
$63,967,799 in cash flows from operations and there are no assurances that the Company will generate positive cash
flows in the future. Additionally, there are no assurances that the Company will be successful in obtaining an adequate
level of financing for the development and commercialization of its product candidates.

As of December 31, 2020, the Company had cash and cash equivalents in the amount of $209,520,355, which
consisted of depository accounts. On January 30, 2019, the Company entered into a collaboration, option and license
agreement with Janssen Pharmaceuticals, Inc. (“Janssen”), one of the Janssen Pharmaceuticals Companies of
Johnson & Johnson (the “Collaboration Agreement”), for the research, development and commercialization of gene
therapies for the treatment of inherited retinal diseases (“IRD”). Under the terms of the Collaboration Agreement, the
Company received an upfront payment of $100,000,000. The Company also receives funding for certain research,
manufacturing, clinical development and commercialization costs, potential additional milestone payments upon the
achievement of such milestones and royalties on future net sales of products. The Company estimates that its cash and
cash equivalents on hand at December 31, 2020 will be sufficient to cover its expenses for at least the next twelve
months from the date of issuance of these consolidated financial statements.

Risks and Uncertainties

The Company operates in an industry that is subject to intense competition, government regulation and rapid
technological change. The Company’s operations are subject to significant risk and uncertainties including financial,
operational, technological, regulatory and other risks, including the potential risk of business failure.

There are also many uncertainties regarding the pandemic caused by the novel coronavirus, or COVID-19, and the
Company continues to monitor the impact of the pandemic on all aspects of its business, including how the pandemic
will impact its financial condition, liquidity, operations, clinical studies, employees, vendors, and industry. While the
pandemic did not materially affect the Company's financial results and business operations in the year ended
December 31, 2020, the Company is unable to predict the impact that COVID-19 will have on its financial position
and operating results in future periods due to numerous uncertainties. The Company will continue to assess the
evolving impact of the COVID-19 pandemic and will make adjustments to its operations as necessary.

The Company’s capital resources and operations to date have been funded primarily with the proceeds from the
Collaboration Agreement and private and public equity offerings. In the future, the Company may seek to raise
additional capital through equity offerings, debt financings, marketing and distribution arrangements and other
collaborations, strategic alliances and licensing arrangements or other sources to enable it to complete the development
and potential commercialization of its product candidates. The COVID-19 outbreak and mitigation measures also have
had, and may continue to have, an adverse impact on global economic conditions, which could have an adverse effect
on the Company’s ability to raise capital when needed.

2.    Summary of Significant Accounting Policies

Consolidation

The accompanying consolidated financial statements include the accounts of Meira Holdings and its wholly owned
subsidiaries:

MeiraGTx Limited, a limited company incorporated under the laws of England and Wales;
MeiraGTx, LLC, a Delaware limited liability company (“Meira LLC”);

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

MeiraGTx UK II Limited, a limited company incorporated under the laws of England and Wales (“Meira UK II”);
MeiraGTx Ireland DAC, a designated activity company incorporated under the laws of Ireland (“Meira Ireland”);
MeiraGTx Netherlands B.V., a private company with limited liability incorporated under the laws of the
Netherlands (“Meira Netherlands”);
BRI-Alzan, Inc., a Delaware corporation (“BRI-Alzan”);
MeiraGTx Bio Inc., a Delaware corporation (“Meira Bio”);
MeiraGTx B.V., a private company with limited liability incorporated under the laws of the Netherlands (“Meira
B.V.”);
MeiraGTx Neurosciences, Inc., a Delaware corporation (“Meira Neuro”); and
MeiraGTx UK Limited, a limited company incorporated under the laws of England and Wales (“Meira UK”).

All intercompany balances and transactions between the consolidated companies have been eliminated in
consolidation.

Use of Estimates

Management considers many factors in selecting appropriate financial accounting policies and controls, and in 
developing the estimates and assumptions that are used in the preparation of these consolidated financial statements. 
Management must apply significant judgment in this process. In addition, other factors may affect estimates, including 
expected business and operational changes, sensitivity and volatility associated with the assumptions used in 
developing estimates, and whether historical trends are expected to be representative of future trends. The estimation 
process often may yield a range of potentially reasonable estimates of the ultimate future outcomes and management 
must select an amount that falls within that range of reasonable estimates. This process may result in actual results 
differing materially from those estimated amounts used in the preparation of the financial statements if these results 
differ from historical experience, or other assumptions do not turn out to be substantially accurate, even if such 
assumptions are reasonable when made. In preparing these  consolidated financial statements, management used 
significant estimates in the following areas, among others: collaboration revenue, the accounting for research and 
development costs, share-based compensation, leases, asset retirement obligations and tax incentive receivable. 

Additionally, the Company has made estimates of the impact of the COVID-19 pandemic within the consolidated
financial statements and there may be changes to those estimates in future periods. Actual results may differ from
these estimates.

Cash and Cash Equivalents

The Company considers all highly liquid instruments with an original maturity of 90 days or less at the time of 
purchase to be cash equivalents.  Cash and cash equivalents consist of checking and money market accounts that are 
readily convertible into cash.

Financial Instruments

The carrying value of accounts receivable-related party, tax incentive receivable, other current assets, and accounts
payable reported in the consolidated balance sheets equal or approximate fair value due to their short maturities.

Tax Incentive Receivable

Meira UK II is eligible to participate in a UK research and development tax incentive programs under which it is
eligible to receive a cash refund from Her Majesty’s Revenue & Customs (“HMRC”) for a percentage of the qualified
research and development costs expended by Meira UK II under the small and medium sized enterprises

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(“SME”) program and the research and development expenditures credit (“RDEC”) program. The SME cash refund is
available to companies with less than 500 employees and annual aggregate revenue of less than 100.0 million euro or
total aggregate assets less than 86.0 million euro during the reimbursable period. The Company’s estimate of the
amount of cash refund it expects to receive related to the SME and RDEC programs is included in tax incentive
receivable in the accompanying consolidated balance sheets and such amounts are recorded as a reduction of research
and development expense in the statements of operations. During the years ended December 31, 2020 and 2019, the
Company recorded reductions to research and development expenses of $5.3 million and $12.0 million, respectively.  

In addition, the Company incurs Value Added Tax (“VAT”) on services provided by UK, Netherlands and Ireland
vendors, which it is entitled to reclaim. The Company’s estimate of the amount of cash refund it expects to receive
related to VAT was $4.0 million and $1.8 million as of December 31, 2020 and 2019, respectively, which is included in
other current assets in the accompanying consolidated balance sheet.

Foreign Currency Contracts

The Company uses foreign currency forward contracts to protect against changes in anticipated foreign currency cash
flows resulting from changes in foreign currency exchange rates, primarily associated with non-functional currency
denominated expenses. The Company does not designate its foreign currency forward contracts as part of a hedging
transaction. Changes in the fair value are recorded each period within the Company’s consolidated statement of
operations and comprehensive loss as a component of net loss. There were no foreign currency forward contracts
outstanding as of December 31, 2020.

Fair Value Measurements

Fair value is defined as the price that would be received upon sale of an asset or paid upon transfer of a liability in an
orderly transaction between market participants at the measurement date and in the principal or most advantageous
market for that asset or liability. The fair value should be calculated based on assumptions that market participants
would use in pricing the asset or liability, not on assumptions specific to the entity. In addition, the fair value of
liabilities should include consideration of non-performance risk including the Company’s own credit risk.

The Company follows ASC Topic 820, Fair Value Measurements and Disclosures, or ASC 820, for application to
financial assets and liabilities. In addition to defining fair value, the standard expands the disclosure requirements
around fair value and establishes a fair value hierarchy for valuation inputs. The hierarchy prioritizes the inputs into
three levels based on the extent to which inputs used in measuring fair value are observable in the market. Each fair
value measurement is reported in one of the three levels which are determined by the lowest level input that is
significant to the fair value measurement in its entirety. These levels are:

● Level 1: Observable inputs such as quoted prices in active markets for identical assets the reporting entity

has the ability to access as of the measurement date;

● Level 2: Inputs, other than the quoted prices in active markets, that are observable either directly or

indirectly; and

● Level 3: Unobservable inputs in which there is little or no market data, which require the reporting entity

to develop its own assumptions.

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The table below represents the values of the Company's financial assets and liabilities that are required to be measured
at fair value on a recurring basis:

Description
Asset retirement obligations

December 31, 
2020
$ 1,814,338

Description
Restricted cash
Asset retirement obligations

December 31, 
2019
$
123,376
$ 1,654,755

Fair Value Measurement Using:
Significant
Observable Inputs
(Level 1)

     Significant Other     
Observable Inputs
(Level 2)

Significant
Unobservable
(Level 3)

$

— $

— $ 1,814,338

Fair Value Measurement Using:
Significant
Observable Inputs
(Level 1)

     Significant Other     
Observable Inputs
(Level 2)

Significant
Unobservable
(Level 3)

$
$

123,376

$
— $

— $
—
— $ 1,654,755

Concentrations of Credit Risk

The Company maintains its cash and cash equivalents primarily in depository and money market accounts within two
large financial institutions in the United States and one large financial institution in the United Kingdom and Ireland.
 Cash balances deposited at these major financial banking institutions exceed the insured limit. The Company has not
experienced any losses on its bank deposits and believes these deposits do not expose the Company to any significant
credit risk.

Intangible Assets

Intangible assets consist of purchased rights to licensed technology as it relates to the Company’s manufacturing 
processes and has future alternative in the Company’s operations.  The licensed technology is being amortized on a 
straight-line basis over 7 years, which represents the estimated periods of benefit and the expected pattern of 
consumption (see Note 6).

Property, Plant and Equipment, Net

Property, plant and equipment are stated at cost, net of accumulated depreciation. Depreciation is calculated using the
straight-line method over the estimated useful lives of the respective assets. Leasehold improvements are depreciated
over the lesser of their useful lives or the life of the lease (see Note 5).

The estimated useful lives of the asset categories are as follows:

Asset Category
Computer and office equipment
Laboratory equipment
Manufacturing equipment
Furniture and fixtures
Leasehold improvements

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Useful Lives

3 years
5 years
7 years
5 years
lesser of useful
life or
remaining term
of lease

    
    
    
    
    
 
 
 
 
 
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Expenditures for leasehold improvements are capitalized, and expenditures for maintenance and repairs are expensed
to operations as incurred.

ASC Topic 360, Property, Plant and Equipment, addresses the financial accounting and reporting for impairment or
disposal of long-lived assets. The Company reviews the recorded values of long-lived assets for impairment whenever
events or changes in business circumstances indicate that the carrying amount of an asset or group of assets may not be
fully recoverable. The Company recorded no material impairment charges in 2020 or 2019.

Leases

The Company accounts for leases in accordance with ASC 842. The Company determines if an arrangement is a lease
at contract inception. A lease exists when a contract conveys the right to control the use of identified property, plant, or
equipment for a period of time in exchange for consideration. The definition of a lease embodies two conditions:
(1) there is an identified asset in the contract that is land or a depreciable asset (i.e., property, plant, and equipment),
and (2) the Company has the right to control the use of the identified asset. The Company accounts for the lease and
non-lease components as a single lease component.

From time to time the Company enters into direct financing lease arrangements that include a lessee obligation to
purchase the leased asset at the end of the lease term, a bargain purchase option, or provides for minimum lease
payments with a present value of 90% or more of the fair value of the leased asset at the date of lease inception.

Operating leases where the Company is the lessee are included in right-of-use (“ROU”) assets and lease obligations
are included on the Company’s consolidated balance sheets. The lease obligations are initially and subsequently
measured at the present value of the unpaid lease payments at the lease commencement date and subsequent reporting
periods.

Finance leases where the Company is the lessee are included in ROU assets and lease obligations on the Company’s
consolidated balance sheets. The lease obligations are initially measured in the same manner as for operating leases
and are subsequently measured at amortized cost using the effective interest method.

Key estimates and judgments include how the Company determined (1) the discount rate used to discount the unpaid
lease payments to present value, (2) lease term and (3) lease payments.

ASC 842 requires a lessee to discount its unpaid lease payments using the interest rate implicit in the lease or, if that
rate cannot be readily determined, its incremental borrowing rate. As most of the Company’s leases where it is the
lessee do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information
available at commencement date in determining the present value of lease payments. The Company’s incremental
borrowing rate for a lease is the rate of interest it would have to pay on a collateralized basis to borrow an amount
equal to the lease payments under similar terms. The Company uses the implicit rate when readily determinable.

The lease term for all of the Company’s leases includes the non-cancellable period of the lease plus any additional
periods covered by either a lessee option to extend (or not to terminate) the lease that is reasonably certain to be
exercised, or an option to extend (or not to terminate) the lease controlled by the lessor.

The ROU asset is initially measured at cost, which comprises the initial amount of the lease liability adjusted for lease
payments made at or before the lease commencement date less any lease incentives received.

For operating leases, the ROU asset is subsequently measured throughout the lease term at the carrying amount of the
lease liability, minus any accrued lease payments, less the unamortized balance of lease incentives received. Lease
expense for lease payments is recognized on a straight-line basis over the lease term.

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For finance leases, the ROU asset is subsequently amortized using the straight-line method from the lease
commencement date to the earlier of the end of its useful life or the end of the lease term unless the lease transfers
ownership of the underlying asset, or the Company is reasonably certain to exercise an option to purchase the
underlying asset. In those cases, the ROU asset is amortized over the useful life of the underlying asset. Amortization
of the ROU asset is recognized and presented separately from interest expense on the lease liability.

The Company has elected not to recognize ROU assets and lease liabilities for all short-term leases that have a lease
term of 12 months or less at lease commencement. Lease payments associated with short-term leases are recognized as
an expense on a straight-line basis over the lease term.

Asset Retirement Obligations

Accounting for asset retirement obligations requires legal obligations associated with the retirement of long-lived 
assets to be recognized at fair value when incurred and capitalized as part of the related long-lived asset.  In the 
absence of quoted market prices, the Company estimates the fair value of its asset retirement obligations using Level 3 
present value techniques, in which estimates of future cash flows associated with retirement activities are discounted 
using a credit-adjusted risk-free rate of 8%.  Asset retirement obligations currently reported on the Company’s 
consolidated balance sheets were measured during a period of historically low interest rates.  The impact on 
measurements of new asset retirement obligations using different rates in the future may be significant.

The Company uses estimates to determine the asset retirement obligations at the end of the lease term and discounts
such asset retirement obligations using an estimated discount rate. Interest on the discounted asset retirement
obligation is amortized over the term of the lease using the effective interest method and is recorded as interest
expense in the consolidated statements of operations and comprehensive loss.

The change in asset retirement obligations is as follows:

Balance at beginning of period
Additional asset retirement obligations during the period
Amortization of interest
Change in fair value
Effects of exchange rate
Balance at end of period

     $

$

For the Year Ended December 31, 
2019

2020

1,654,755      $
—  

136,069

—  

23,514
1,814,338

$

128,119
1,270,262
20,621
255,999
(20,246)
1,654,755

Share-Based Compensation Expense

Options

The Company grants share options to employees, non-employee members of the Company’s board of directors and
non-employee consultants as compensation for services performed. Employee and non-employee members of the
board of directors’ awards of share-based compensation are accounted for in accordance with ASC 718, Compensation
- Stock Compensation, or ASC 718. ASC 718 requires all share-based payments to employees and non-employee
directors, including grants of share options, to be recognized in the consolidated statement of operations and
comprehensive loss based on their grant date fair values. The grant date fair value of share options is estimated using
the Black-Scholes option valuation model.

Using this model, fair value is calculated based on assumptions with respect to (i) the fair value of the Company’s
ordinary shares on the grant date; (ii) expected volatility of the Company’s ordinary share price, (iii) the periods of

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time over which the optionees are expected to hold their options prior to exercise (expected term), (iv) expected
dividend yield on the Company’s ordinary shares, and (v) risk-free interest rates.

As there had been no public market for the Company’s ordinary shares until the Company’s initial public offering 
(“IPO”) on June 7, 2018, the estimated fair value of the ordinary shares until that time had been determined by the 
Company’s board of directors as of the date of each option grant, with input from management, considering the most 
recently available third-party valuations of ordinary shares and the board of directors’ assessment of additional 
objective and subjective factors that it believed were relevant and which may have changed from the date of the most 
recent valuation through the date of the grant.  The assumptions underlying these valuations represented management’s 
best estimate, which involved inherent uncertainties and the application of management’s judgment. As a result, if the 
Company had used different assumptions or estimates, the fair value of its ordinary shares and its share-based 
compensation expense could have been materially different.

The fair value of ordinary shares after the Company’s IPO was determined based upon the closing share price on the
date of grant.

Since the Company’s ordinary shares had not been traded on a public exchange prior to the Company’s IPO and have
only been traded on a public exchange for a short period of time since the Company’s IPO, the Company believes that
it does not have sufficient company-specific information available to determine the expected term based on its
historical data. As a result, the expected term of share options granted to the optionees is determined using the average
of the vesting period and contractual life of the option, an accepted method for the Company’s option grants under the
Securities and Exchange Commission’s (“SEC”) Staff Accounting Bulletin No. 107 and No. 110, Share-Based
Payment.

Similarly, the Company believes that its future volatility could differ materially during the expected term from the
volatility that would be calculated from its historical share prices to date. Consequently, expected volatility is based on
an analysis of guideline companies in accordance with ASC 718. The expected dividend yield is zero as the Company
has never paid dividends and does not currently anticipate paying any in the foreseeable future. Risk-free interest rates
are based on quoted U.S. Treasury rates for securities with maturities approximating the option’s expected term.

Restricted Shares

In connection with certain employment, service and research agreements, the Company has granted restricted ordinary
shares as compensation. The ordinary shares are recognized in the consolidated statements of operations and
comprehensive loss based on their grant date fair values. Compensation cost relating to share grants with service-based
graded vesting schedules is recognized based on the vesting schedule.

Restricted Share Units

The Company grants restricted share units (“RSUs”) to employees and non-employee consultants as compensation for
services performed. Awards of RSUs are accounted for in accordance with ASC 718, Compensation - Stock
Compensation, or ASC 718. ASC 718 requires all share-based payments to employees and non-employee directors,
including grants of RSUs, to be recognized in the consolidated statement of operations and comprehensive loss based
on their grant date fair values. The grant date fair value of RSUs is determined using the closing market price of the
Company’s ordinary shares on the date of grant.

Collaboration Arrangements

The Company evaluates its collaborative arrangements pursuant to ASC 808, Collaborative Arrangements (“ASC
808”) and ASC 606, Revenue from Contracts with Customers (“ASC 606”). The Company considers the nature and

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

contractual terms of collaborative arrangements and assesses whether the arrangement involves a joint operating
activity pursuant to which the Company is an active participant and is exposed to significant risks and rewards with
respect to the arrangement. If the Company is an active participant and is exposed to significant risks and rewards with
respect to the arrangement, the Company accounts for the arrangement as a collaboration under ASC 808. To date, the
Company has entered into two separate collaboration agreements, both of which are with Janssen, which were
determined to be within the scope of ASC 808.

ASC 808 does not address recognition or measurement matters related to collaborative arrangements. Payments
between participants pursuant to a collaborative arrangement that are within the scope of other authoritative
accounting literature on income statement classification are accounted for using the relevant provisions of that
literature. If the payments are not within the scope of other authoritative accounting literature, the income statement
classification for the payments is based on an analogy to authoritative accounting literature or if there is no appropriate
analogy, a reasonable, rational and consistently applied accounting policy election. Payments received from a
collaboration partner to which this policy applies may include upfront payments in respect of a license of intellectual
property, development and commercialization-based milestones, and royalties.

Refer to the discussion in Note 11 for further information related to the accounting for the Collaboration Agreement.

Revenue Recognition

Arrangements with collaborators may include licenses to intellectual property, research and development services,
manufacturing services for clinical and commercial supply, and participation on joint steering committees. The
Company evaluates the promised goods or services to determine which promises, or group of promises, represent
performance obligations. In contemplation of whether a promised good or service meets the criteria required of a
performance obligation, the Company considers the stage of development of the underlying intellectual property, the
capabilities and expertise of the customer relative to the underlying intellectual property, and whether the promised
goods or services are integral to or dependent on other promises in the contract. When accounting for an arrangement
that contains multiple performance obligations, the Company must develop judgmental assumptions, which may
include market conditions, reimbursement rates for personnel costs, development timelines and probabilities of
regulatory success to determine the stand-alone selling price for each performance obligation identified in the contract.

When the Company concludes that a contract should be accounted for as a combined performance obligation and
recognized over time, the Company must then determine the period over which revenue should be recognized and the
method by which to measure revenue. The Company generally recognizes revenue using a cost-based input method.

The Collaboration Agreement with Janssen is accounted for under ASC 808, however, as ASC 808 does not address
recognition or measurement matters such as determining the appropriate unit of accounting or when the recognition
criteria are met, the Company accounts for the consideration received from Janssen in accordance with ASC 606. In
accordance with ASC 606, the Company recognizes revenue when its customer or collaborator obtains control of
promised goods or services, in an amount that reflects the consideration which the Company expects to receive in
exchange for those goods or services. To determine revenue recognition for arrangements that the Company
determines are within the scope of ASC 606, it performs the following five steps:

i.

ii.

identify the contract(s) with a customer;

identify the performance obligations in the contract;

iii.

determine the transaction price;

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

iv.

v.

allocate the transaction price to the performance obligations within the contract; and

recognize revenue when (or as) the entity satisfies a performance obligation.

The Company only applies the five-step model to contracts when it determines that it is probable it will collect the
consideration it is entitled to in exchange for the goods or services it transfers to the customer.

At contract inception, once the contract is determined to be by analogy within the scope of ASC 606, the Company
assesses the goods or services promised within the contract to determine whether each promised good or service is a
performance obligation. The promised goods or services in the Company’s arrangements typically consist of a license
to the Company’s intellectual property and research, development and manufacturing services. The Company may
provide options to additional items in such arrangements, which are accounted for as separate contracts when the
customer elects to exercise such options, unless the option provides a material right to the customer. Performance
obligations are promises in a contract to transfer a distinct good or service to the customer that (i) the customer can
benefit from on its own or together with other readily available resources, and (ii) is separately identifiable from other
promises in the contract. Goods or services that are not individually distinct performance obligations are combined
with other promised goods or services until such combined group of promises meet the requirements of a performance
obligation.

The Company determines transaction price based on the amount of consideration the Company expects to receive for
transferring the promised goods or services in the contract. Consideration may be fixed, variable, or a combination of
both. At contract inception for arrangements that include variable consideration, the Company estimates the
probability and extent of consideration it expects to receive under the contract utilizing either the most likely amount
method or expected amount method, whichever best estimates the amount expected to be received. The Company then
considers any constraints on the variable consideration and includes in the transaction price variable consideration to
the extent it is deemed probable that a significant reversal in the amount of cumulative revenue recognized will not
occur when the uncertainty associated with the variable consideration is subsequently resolved.

The Company then allocates the transaction price to each performance obligation based on the relative standalone
selling price and recognizes as revenue the amount of the transaction price that is allocated to the respective
performance obligation when (or as) control is transferred to the customer and the performance obligation is satisfied.
For performance obligations which consist of licenses and other promises, the Company utilizes judgment to assess the
nature of the combined performance obligation to determine whether the combined performance obligation is satisfied
over time or at a point in time and, if over time, the appropriate method of measuring progress. The Company
evaluates the measure of progress each reporting period and, if necessary, adjusts the measure of performance and
related revenue recognition.

The Company records amounts as accounts receivable when the right to consideration is deemed unconditional. When
consideration is received, or such consideration is unconditionally due, from a customer prior to transferring goods or
services to the customer under the terms of a contract, a contract liability is recorded as deferred revenue.

Amounts received prior to satisfying the revenue recognition criteria are recognized as deferred revenue in the
Company’s consolidated balance sheet. Amounts expected to be recognized as revenue within the 12 months following
the balance sheet date are classified as deferred revenue – related party, current. Amounts not expected to be
recognized as revenue within the 12 months following the balance sheet date are classified as deferred revenue –
related party.

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The Company’s collaboration revenue arrangements include the following:

Up-front License Fees: If a license is determined to be distinct from the other performance obligations identified in the
arrangement, the Company recognizes revenues from nonrefundable, up-front fees allocated to the license when the
license is transferred to the licensee and the licensee is able to use and benefit from the license. For licenses that are
bundled with other promises, the Company utilizes judgment to assess the nature of the combined performance
obligation to determine whether the combined performance obligation is satisfied over time or at a point in time and, if
over time, the appropriate method of measuring progress for purposes of recognizing revenue from non-refundable,
up-front fees. The Company evaluates the measure of progress each reporting period and, if necessary, adjusts the
measure of performance and related revenue recognition.

Milestone Payments: At the inception of an agreement that includes research and development milestone payments,
the Company evaluates each milestone to determine when and how much of the milestone to include in the transaction
price. The Company first estimates the amount of the milestone payment that the Company could receive using either
the expected value or the most likely amount approach. The Company primarily uses the most likely amount approach
as that approach is generally most predictive for milestone payments with a binary outcome. Then, the Company
considers whether any portion of that estimated amount is subject to the variable consideration constraint (that is,
whether it is probable that a significant reversal of cumulative revenue would not occur upon resolution of the
uncertainty.) The Company updates the estimate of variable consideration included in the transaction price at each
reporting date which includes updating the assessment of the likely amount of consideration and the application of the
constraint to reflect current facts and circumstances.

Royalties: For arrangements that include sales-based royalties, including milestone payments based on a level of sales,
and the license is deemed to be the predominant item to which the royalties relate, the Company will recognize
revenue at the later of (i) when the related sales occur, or (ii) when the performance obligation to which some or all of
the royalty has been allocated has been satisfied (or partially satisfied). To date, the Company has not recognized any
revenue related to sales-based royalties or milestone payments based on the level of sales.

Research and Development Services: The Company is incurring research and development costs, with Janssen
responsible for up to 100% of the costs, depending on the type of research and development services being performed.
The Company records costs associated with the development activities as research and development expenses in the
consolidated statement of operations and comprehensive loss consistent with ASC 730, Research and Development.
The reimbursement of the research and development costs by Janssen is representative of the joint risk sharing nature
of the arrangement. The Company considered the guidance in ASC 808 and recognizes the payments received from
Janssen as a reduction to research and development expense when the related costs are incurred.

Research and Development

Research and development costs are charged to expense as incurred. These costs include, but are not limited to, 
employee-related expenses, including salaries, benefits and travel of the Company’s research and development 
personnel; expenses incurred under agreements with contract research organizations and investigative sites that 
conduct clinical and preclinical studies and for the drug product for the clinical studies and preclinical activities; 
facilities; supplies; rent, insurance, certain legal fees, share-based compensation, depreciation, other costs associated 
with clinical and preclinical activities and regulatory operations and acquisition of in process research and 
development write-offs.  Research funding under collaboration agreements and refundable research and development 
credits / tax credits are recorded as an offset to these costs.

Costs for certain development activities, such as Company funded outside research programs, are recognized based on
an evaluation of the progress to completion of specific tasks with respect to their actual costs incurred. Payments for
these activities are based on the terms of the individual arrangements, which may differ from the pattern of costs

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incurred, and are reflected in the consolidated financial statements as prepaid or accrued research and development
expenses, as the case may be.

Foreign Currencies

The Company’s consolidated financial statements are presented in U.S. dollars, the reporting currency of the 
Company. The financial position and results of operations of Meira UK II, Meira Ireland, Meira Netherlands and 
Meira B.V. are measured using the foreign subsidiaries’ local currency as the functional currency. These entities’ cash 
accounts holding U.S. dollars are remeasured based upon the exchange rate at the date of remeasurement with the 
resulting gain or loss included in the consolidated statements of operations and comprehensive loss.  Expenses of such 
subsidiaries have been translated into U.S. dollars at average exchange rates prevailing during the period. Assets and 
liabilities have been translated at the rates of exchange on the consolidated balance sheet dates. The resulting 
translation gain and loss adjustments are recorded directly as a separate component of shareholders' equity and as other 
comprehensive loss on the consolidated statements of operations and comprehensive loss.

Income Taxes

Income taxes are recorded in accordance with ASC Topic 740, Income Taxes, or ASC 740, which provides for deferred
taxes using an asset and liability approach. The Company recognizes deferred tax assets and liabilities for the expected
future tax consequences of events that have been included in the financial statements or tax returns. Deferred tax assets
and liabilities are determined based on the difference between the financial statement and tax bases of assets and
liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. Realization of
net deferred tax assets is dependent on future taxable income. Valuation allowances are provided if, based upon the
weight of available evidence, it is more likely than not that some, or all, of the deferred tax assets will not be realized.
Realization of net deferred tax assets is dependent on future taxable income (see Note 10).

The Company accounts for uncertain tax positions in accordance with the provisions of ASC 740. When uncertain tax
positions exist, the Company recognizes the tax benefit of tax positions to the extent that the benefit will more likely
than not be realized. The determination as to whether the tax benefit will more likely than not be realized is based
upon the technical merits of the tax position as well as consideration of the available facts and circumstances. As of
December 31, 2020 and 2019, the Company recorded unrecognized tax positions of $512,785 and $0, respectively.  No
interest and penalties have been accrued relative to the unrecognized tax positions.

The Company is required to estimate income taxes in each of the jurisdictions in which it operates.

Net Loss per Ordinary Share

Basic net loss per ordinary share is computed by dividing net loss by the weighted average number of shares of the
Company’s ordinary shares outstanding during the period of computation. Diluted net loss per ordinary share is
computed similar to basic net loss per share except that the denominator is increased to include the number of
additional ordinary shares that would have been outstanding if the ordinary share equivalents had been issued at the
beginning of the year and if the additional ordinary shares were dilutive (treasury stock method) or the two-class
method, whichever is more dilutive. For all periods presented, basic and diluted net loss per ordinary share are the
same as any additional ordinary share equivalents would be anti-dilutive.

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The following securities are considered to be ordinary share equivalents, but were not included in the computation of
diluted net loss per ordinary share because to do so would have been anti-dilutive:

Restricted share units
Share options
Restricted ordinary shares subject to forfeiture

Other Comprehensive Loss

     December 31,       December 31, 

2020
545,000
4,824,771  

—

5,369,771  

2019

—
3,645,360
217,726
3,863,086

Other comprehensive loss is defined as the change in equity of a business enterprise during a period from transactions 
and other events and circumstances from non-owner sources.  The only component of other comprehensive loss 
impacting the Company is foreign currency translation.

Segment Information

Management has concluded it has a single reporting segment for purposes of reporting financial condition and results
of operations.

The Company’s license revenue, research funding and deferred revenue from its Collaboration Agreement are
generated in the United Kingdom.

The following table summarizes non-current assets by geographical area:

United States
United Kingdom
Ireland
Netherlands

December 31, 
2020
17,536,207
44,487,022
27,413,397
1,684,798
91,121,424

$

$

December 31, 
2019
14,354,792
39,476,700
—
1,076,286
54,907,778

$

$

Accounting Pronouncements Recently Adopted

In August 2018, the FASB issued ASU 2018-13, Disclosure Framework-Changes to the Disclosure Requirements for
Fair Value Measurements, which changes the fair value measurement disclosure requirements of ASC 820. The goal
of the ASU is to improve the effectiveness of ASC 820’s disclosure requirements by providing users of the financial
statements with better information about assets and liabilities measured at fair value in the financial statements and
notes thereto. The guidance is applicable for fiscal years beginning after December 15, 2019 and interim periods
within those years. The adoption of the provisions of ASU 2018-13 on January 1, 2020 did not have a material impact
on the current financial statements.

In November 2018, the FASB issued ASU No. 2018-18, Collaborative Arrangements (Topic 808): Clarifying the
Interaction between Topic 808 and Topic 606 (“ASU 2018-18”). The standard amends ASC 808, Collaborative
Arrangements and ASC 606, Revenue from Contracts with Customers, to clarify the interaction between collaborative
arrangement participants that should be accounted for as revenue under ASC 606. In transactions when the
collaborative arrangement participant is a customer in the context of a unit of account, revenue should be accounted
for using the guidance in Topic 606. The amendments in ASU 2018-18 are effective for fiscal years beginning after
December 15, 2019, and interim periods within those fiscal years. The adoption of ASU 2018-18 on January 1, 2020
did not have a material impact on the current financial statements.

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

In August 2018, the FASB issued ASU No. 2018-15, Customer's Accounting for Implementation Costs Incurred in a
Cloud Computing Arrangement That Is a Service Contract.  ASU 2018-15 requires that certain implementation costs 
incurred in a cloud computing arrangement be deferred and recognized over the term of the arrangement. The new 
standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019, 
and early adoption is permitted. The adoption of ASU 2018-15 on January 1, 2020 did not have a material impact on 
the current financial statements.

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740) – Simplifying the Accounting for Income
Taxes.  ASU 2019-12 simplifies the accounting for income taxes by removing exceptions within the general principles 
of Topic 740 regarding the calculation of deferred tax liabilities, the incremental approach for intraperiod tax 
allocation, and calculating income taxes in an interim period.  In addition, the ASU adds clarifications to the 
accounting for franchise tax (or similar tax), which is partially based on income, evaluating tax basis of goodwill 
recognized from a business combination and reflecting the effect of any enacted changes in tax laws or rates in the 
annual effective tax rate computation in the interim period that includes the enactment date.  The ASU is effective for 
fiscal year beginning after December 15, 2020, and will be applied either retrospectively or prospectively based upon 
the applicable amendments.  Early adoption is permitted.  The Company has elected to adopt this ASU as of January 1, 
2020 on a prospective basis.  The adoption of ASU 2019-12 did not have a material impact on the current financial 
statements.

Recent Accounting Pronouncements Not Yet Adopted

In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of
Credit Losses on Financial Instruments, which adds a new Topic 326 to the Codification and removes the thresholds
that companies apply to measure credit losses on financial instruments measured at amortized cost, such as loans,
receivables, and held-to-maturity debt securities. Under current GAAP, companies generally recognize credit losses
when it is probable that the loss has been incurred. The revised guidance will remove all recognition thresholds and
will require companies to recognize an allowance for credit losses for the difference between the amortized cost basis
of a financial instrument and the amount of amortized cost that the company expects to collect over the instrument’s
contractual life. ASU 2016-13 also amends the credit loss measurement guidance for available-for-sale debt securities
and beneficial interests in securitized financial assets. The guidance is applicable for fiscal years beginning after
December 15, 2019 and interim periods within those years, however, the FASB extended the effective date for smaller
reporting companies to fiscal years beginning after December 15, 2022. The Company is currently evaluating the
potential impact of the adoption of this standard on its related disclosures.

3.    Acquisitions

Emrys Bio Inc.

On April 9, 2020 (the “Closing Date”), the Company acquired Emrys, a pre-clinical biopharmaceutical company
developing brain-derived neurotrophic factor gene therapy for treatment of genetic obesity disorders, as well as the
development of gene therapy product candidates for other central nervous system diseases. The Company acquired
Emrys pursuant to an Agreement and Plan of Merger (the “Emrys Merger Agreement”), dated as of April 9, 2020, by
and among the Company, Emrys, and EB Acquisition, Inc., a wholly-owned subsidiary of the Company (“Merger
Sub”), the Emrys stockholders and the Emrys stockholder representative, pursuant to which Merger Sub was merged
with and into Emrys, with Emrys being the surviving corporation (the “Merger”). As a result of the Merger, Emrys
became a wholly-owned subsidiary of the Company and was renamed MeiraGTx Bio Inc.

As part of the entry into the Emrys Merger Agreement, the parties to the Agreement and Plan of Merger (the “Vector
Merger Agreement”), dated October 5, 2018, entered into an Amendment and Waiver to the Vector Merger Agreement
by and among the Company, VN Acquisition, Inc., VN Acquisition 2, Inc., the former Vector Neurosciences Inc.
(“Vector”) stockholders and the Vector stockholder representative, to terminate and waive all milestone payments
payable under the Vector Merger Agreement that were otherwise required if specified

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

regulatory milestones were met, and to terminate and waive all royalty payments that were otherwise required to be
paid under the Vector Merger Agreement. Several of the selling Emrys stockholders were also stockholders of Vector.

In connection with the acquisition of Emrys and the termination and waiver of the milestone and royalty payments
otherwise required under the Vector Merger Agreement, the consideration to Emrys selling stockholders consisted of
an aggregate of 580,000 of the Company’s ordinary shares of which (i) 232,000 ordinary shares were issued on the
Closing Date, (ii) 290,000 restricted ordinary shares were issued on the Closing Date, with 50% of such restricted
ordinary shares scheduled to vest on each of the first and second anniversaries of the Closing Date, and (iii) 58,000
ordinary shares will be issued 18 months following the Closing Date, provided that the shares described in clauses (ii)
and (iii) are subject to certain indemnification claims under the Emrys Merger Agreement. Total consideration of
$7,685,001 was based on the closing price of the Company’s ordinary shares of $13.25 per share on the Closing Date.

The Company determined this transaction represented an asset acquisition as substantially all of the value was in the
intellectual property as defined by ASC 805, Business Combinations (“ASC 805”). The asset acquisition of in process
research and development was recorded at a fair value of $7,685,001 as of April 9, 2020. The acquired in process
research and development was immediately charged to research and development expense in the consolidated
statement of operations and comprehensive loss as of the acquisition date since the Company determined that there
was no additional alternative use of these assets.

Arthrogen B.V.

On October 17, 2019, the Company acquired 100% of the outstanding equity of Arthrogen, a biopharmaceutical
company developing gene therapy for different indications, using viral mediated gene transfer. Arthrogen specializes
in the development of viral gene therapy vectors, in particular adeno-associated virus (AAV-) based therapeutics.
Arthrogen was renamed MeiraGTx Netherlands B.V.

The purchase price consideration was €500,000, or approximately $558,335, and the Company utilized cash on hand.  
The Company incurred €94,692, or approximately $105,740, in acquisition related costs that were expensed
immediately and recorded within general and administrative expenses within the Company’s consolidated statement of
operations and comprehensive loss.

At the time of acquisition, the net assets acquired were comprised of cash and working capital and were recorded at
their respective acquisition date fair values. The excess purchase price over the net tangible assets was ascribed to in-
process research and development. The acquisition was not significant to the Company’s consolidated financial
statements; therefore, pro forma results of the operations related to this business acquisition for the year
ended December 31, 2019 have not been presented. The immaterial results of Arthrogen’s operations since October 17,
2019 have been included in the Company’s consolidated financial statements.

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4.    Prepaid Expenses

MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Prepaid expenses at December 31, 2020 and 2019 consist of the following:

Insurance
Clinical trial costs
Manufacturing costs
Dues and license fees
Rent
Research and development
Other

December 31, 
2020
2,901,728
1,624,873
1,395,141
515,328
169,038
164,338
311,301
7,081,747

$

$

December 31, 
2019
1,758,915
1,349,657
259,509
264,123
183,952
239,161
408,768
4,464,085

$

$

5.    Property, Plant and Equipment, net

Property, plant and equipment, net at December 31, 2020 and 2019 consist of the following:

Leasehold improvements
Manufacturing equipment
Laboratory equipment
Computer and office equipment
Furniture and fixtures

Less: Accumulated depreciation

December 31, 
2020
33,776,712
7,021,162
7,350,285
3,712,884
567,730
52,428,773
(8,386,870)
44,041,903

$

$

December 31, 
2019

17,557,316
5,647,484
3,700,632
1,066,984
441,101
28,413,517
(4,555,409)
23,858,108

$

$

In connection with certain operating leases, the Company has determined that it has asset retirement obligations in the
aggregate amount of $3,736,404 at the end of those leases. The Company discounted the asset retirement obligations
using an 8% discount rate and recorded an asset retirement obligation in the aggregate amount of $1,643,794, which is
included in leasehold improvements and is being depreciated over the term of the respective leases.

Capitalized finance leases in the amount of $95,880 are included in computer and office equipment and were fully
depreciated as of December 31, 2019.

Depreciation expense was $4,171,626 and $2,238,560 for the years ended December 31, 2020 and 2019 respectively.

6.

Intangible Assets

In November 2020, the Company entered into a non-exclusive, royalty-free technology license agreement that required
the Company to pay an upfront payment to the licensor of $2.1 million.  The Company accounted for the transaction as 
an asset acquisition and recorded an intangible asset as it was determined to have alternative future uses in connection 
with the Company’s manufacturing capabilities.

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The following table presents the details of the Company’s intangible assets as of December 31, 2020:

Type
Licensed Technology

Amortization Gross Carrying Accumulated
Amount
$ 2,144,541

    Amortization    
$ 25,530

Period
7 years

Net
$ 2,119,011

There were no intangible assets as of December 31, 2019.  For the year ended December 31, 2020, amortization 
expense of $25,530 was recorded as a component of research and development expenses.  There was no amortization
expense for the year ended December 31, 2019.

As of December 31, 2020, the expected amortization expense for the next five years and thereafter is as follows:

2021
2022
2023
2024
2025
Thereafter
Total amortization

$

Amortization
Expense
306,360
306,360
306,360
306,360
306,360
587,211
$ 2,119,011

7.    Accrued Expenses

Accrued expenses at December 31, 2020 and 2019 were comprised of the following:

Clinical trial costs
Compensation and benefits
Manufacturing costs
Professional fees
Consulting
Fixed assets
Rent and facilities costs
Other

8.   Share-Based Compensation

Equity Incentive Plans

December 31, 
2020
11,154,015
3,791,303
1,885,848
1,219,116
1,046,774
948,571
662,040
153,153
20,860,820

$

$

December 31, 
2019
7,788,077
6,850,335
125,717
486,743
1,247,989
1,108,362
283,876
192,658
18,083,757

$

$

The Company’s 2018 Incentive Award Plan and 2016 Equity Incentive Plan (collectively, the “Plans”), were adopted
by the Company’s board of directors and shareholders. Under the Plans, the Company has granted share options and
restricted share units (“RSUs”) to selected officers, employees and non-employee consultants. The Company’s board
of directors or a committee thereof administers the Plans. Upon the adoption of the 2018 Incentive Award Plan, the
Company ceased issuing awards under the 2016 Equity Incentive Plan. The number of shares available for issuance
under the 2018 Incentive Award Plan are increased on January 1 of each calendar year beginning in 2019 and ending
in and including 2028, by an amount equal to the lesser of (A) 4% of the ordinary shares outstanding on the final day
of the immediately preceding calendar year and (B) a smaller number of shares

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

determined by the Company's board of directors. Under the 2018 Incentive Award Plan the Company initially reserved
up to 3,054,996 shares for issuance, which has been increased to 5,620,882 as of December 31, 2020. As of December
31, 2020, 1,584,468 shares remain available for future issuance. In January 2021, the number of shares available for
issuance under the 2018 Incentive Award Plan increased by 1,767,566 shares. Also, in January 2021, the Company's
board of directors authorized the issuance of 505,000 restricted share units to certain executives and up to 1,303,700
options to certain executives, employees and consultants, in each case, under the 2018 Incentive Award Plan.

Options

A summary of the Company’s share option activity related to employees, non-employee members of the board of
directors and non-employee consultants as of and for the years ended December 31, 2020 and 2019 is as follows:

Outstanding at December 31, 2018
Granted
Exercised
Expired
Forfeited
Outstanding at December 31, 2019
Granted
Exercised
Expired
Forfeited
Outstanding at December 31, 2020
Options exercisable at December 31, 2020
Aggregate intrinsic value of options outstanding as of December
31, 2020
Aggregate intrinsic value of options exercisable as of December
31, 2020

     Weighted-
Average
Exercise
Price

$

Weighted-
Average
Remaining
Contractual
Life (years)

8.45 years

7.67 years
6.71 years

7.64  
17.94  
4.14  
—  
9.37  
9.31  
15.91  
7.69  
—
15.71  
11.85
8.88

Number of
Options
3,254,365
551,000
(134,533)

—  

(25,472)
3,645,360
1,666,500
(109,296)
—
(377,793)
4,824,771
2,249,113

$
$

$ 22,338,580

$ 15,365,249

Options granted under the Plans have a maximum contractual term of ten years. Options granted generally vest 25%
on the first anniversary of the date of grant and the balance ratably over the next 36 months. Options granted to
directors when they join the board generally vest in 36 equal monthly installments following the date of grant, and
annual options granted to directors generally vest on the earlier of the first anniversary of the date of grant or the day
before the Company’s next annual meeting of shareholders after the date of grant.

The total fair value of options vested during the years ended December 31, 2020 and 2019 was $8,156,474 and
$6,098,621, respectively.

The weighted average grant date fair value of options granted during the years ended December 31, 2020 and 2019
was $11.87 and $13.79, respectively. The grant date fair values of the share options granted were estimated using the
Black-Scholes option valuation model with the following ranges of assumptions (see Note 2):

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Risk-free interest rate
Expected volatility
Expected dividend yield
Expected life (in years)

2020

2019

  0.32 - 2.56%   1.76 - 2.55%

90%
0%
5.5 - 6.1

90%
0%
5.5 - 6.1

For the years ended December 31, 2020 and 2019, total share-based compensation expense recorded in connection
with the options was $12,866,121 and $8,024,476, of which $6,975,323 and $4,338,180 was recoded as general and
administrative expense and $5,890,798 and $3,686,296 was recorded as research and development expense,
respectively.

As of December 31, 2020, the total compensation expense relating to unvested options granted that had not yet been
recognized was $22,808,502, which is expected to be realized over a period of 3.9 years. The Company will issue
shares upon exercise of options from ordinary shares reserved under the Plans.

Restricted Share Units

On January 8, 2020 and March 6, 2020, the Company granted 505,000 and 40,000 RSUs to certain members of senior
management and a consultant, respectively. The RSUs were valued at $20.30 and $16.45 per share, respectively, and
the related share-based compensation expense, which is recognized ratably over the requisite service period, is
included in general and administrative and research and development expenses in the consolidated statements of
operations and comprehensive loss. These RSUs vest 50% on the second anniversary of the date of grant and 25% on
each of the third and fourth anniversaries of the date of grant.

For the year ended December 31, 2020, total share-based compensation expense recorded in connection with the RSUs
was $2,643,833, of which $2,509,495 was recoded as general and administrative expense and $134,338 was recorded
as research and development expense.

As of December 31, 2020, the total compensation expense relating to unvested RSUs granted that had not yet been
recognized was $8,265,667, which is expected to be realized over a period of 3.2 years.

Restricted Ordinary Shares

On June 7, 2018, 1,306,348 restricted ordinary shares, which represented 5% of the fully-diluted outstanding shares of
the Company as of such date, were issued to certain members of senior management in accordance with their
employment agreements. One-third of such shares vested immediately, with the balance vesting quarterly over the next
eight quarters beginning three months after the effectiveness of the Company’s registration statement on Form S-1
filed with the SEC on June 7, 2018 (the “Registration Statement”). The shares were valued at $15.00 per share and the
related share-based compensation expense, which is recognized over the requisite service period, is included in general
and administrative expenses in the consolidated statements of operations and comprehensive loss. Additionally, under
the terms of the employment agreements, the Company was required to pay the income taxes incurred by the grantees
in connection with the grant of those restricted shares.

Total compensation expense in connection with the issuance of those restricted ordinary shares, in the amount of
$6,545,688 and $15,982,670, of which $2,906,626 and $6,531,744 was share-based and $3,639,062 and $9,450,926
was paid in cash, was recorded as general and administrative expense during the years ended December 31, 2020 and
2019, respectively (See Note 12).

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

A summary of the restricted ordinary shares is as follows:

Non-vested at December 31, 2018
Vested during 2019
Non-vested at December 31, 2019
Vested during 2020
Non-vested at December 31, 2020

     Ordinary Shares     

653,174
(435,448)
217,726
(217,726)

$

$

— $

$ Value
9,797,610
(6,531,720)
3,265,890
(3,265,890)
—

During the years ended December 31, 2020 and 2019 the Company recognized total share-based compensation
expense in the accompanying consolidated statements of operations and comprehensive loss as follows:

Research and development
General and administrative
Total share-based compensation

2020
6,025,136
12,391,444
18,416,580

$

$

$

$

2019
5,059,046
10,869,924
15,928,970

The Company does not expect to realize any tax benefits from its share option activity or the recognition of share-
based compensation expense because the Company currently has net operating losses and has a full valuation
allowance against its deferred tax assets. Accordingly, no amounts related to excess tax benefits have been reported in
cash flows from operations or cash flows from financing activities for the years ended December 31, 2020 and 2019.

9.  Ordinary Shares

2020

Public Offering

In November 2020, the Company issued 5,000,000 ordinary shares in a public offering for gross proceeds of $64.3
million. In December 2020, the underwriter exercised its overallotment provision and the Company issued an
additional 750,000 ordinary shares for gross proceeds of $9.6 million. Offering costs in connection with both issuances
were approximately $4.6 million.

At-the-Market Offering

In July 2019, the Company entered into an “at-the-market” sales agreement with Chardan Capital Markets, LLC, or
Chardan, pursuant to which the Company may sell from time to time, ordinary shares having an aggregate offering
price of up to $75.0 million through Chardan, acting as our agent. During the year ended December 31, 2020, the
Company raised gross proceeds of $13.2 million, through the sale of 993,448 ordinary shares pursuant to an “at-the-
market” equity offering program. Offering costs were approximately $0.5 million.  In November 2020, the Company 
terminated the at-the-market equity program.

Acquisitions

In April 2020, the Company issued 522,000 ordinary shares in connection with the acquisition of Emrys Bio Inc.

In October 2020, the Company issued 22,500 ordinary shares, which represented the holdback shares from a previous
acquisition.

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2019

Private Placement

MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

On February 27, 2019, the Company issued 5,797,102 ordinary shares in a private placement for gross proceeds of
$80 million, excluding offering costs of approximately $2.4 million. Johnson & Johnson Innovation – JJDC, Inc.
(“JJDC”), the investment arm of Johnson and Johnson and owner of Janssen, purchased 2,898,550 of the ordinary
shares issued on the same terms and conditions as the other investors in the offering.

Public Offering

On August 7, 2019, the Company issued 3,200,000 ordinary shares in a public offering for gross proceeds of $75
million, excluding offering costs of approximately $5.1 million.

License Agreement

As discussed in Note 11, on March 21, 2019, the Company issued 158,832 ordinary shares in connection with a license
agreement. In accordance with the license agreement, the cost basis of the shares was based on the closing share price
on January 31, 2019.

Other Issuances

On July 7, 2019, the Company issued 19,807 shares to a vendor in the amount of $421,500, which was recorded as
research and development expense.

On October 31, 2019, the Company issued 95,000 shares to a consultant in the amount of $1,372,750, which was
recorded as research and development expense.

10.  Income Taxes

For the years ended December 31, 2020 and 2019, the Company recognized a tax benefit of $0.

As of December 31, 2020, the Company had U.S. federal and state net operating losses (“NOLs”) and foreign
carryforward tax losses which are available to reduce future taxable income of:

United Kingdom
United States
Netherlands
Ireland

State/City
Federal
$ 142,241,850 $
—
$ 34,743,371 $ 34,366,051
—
$ 26,111,603 $
—
626,498 $
$

The U.S. federal and state NOLs incurred prior to January 1, 2018 in the amount of approximately $6.8 million and
$6.7 million, respectively, will begin to expire in 2036. The U.S. NOLs incurred after December 31, 2017 and the UK
and Ireland carryforward tax losses will be indefinitely carried forward. The Netherlands carryforward tax losses
expire after nine years from the date incurred prior to 2019 and six years for tax losses incurred after 2018.  The net 
operating losses incurred in 2011 and earlier have expired as of December 31, 2020. Also, as of December 31, 2020, 
the Company had orphan drug and research and development credits in the U.S. in the amount of $5,127,849 which 
will begin to expire 2036 and research and development credits of $1,204,036 in the UK which can be carried forward 
indefinitely.  The NOLs and carryforward tax losses are subject to review and possible adjustment by the U.S., UK, 
Netherlands, Ireland and state tax authorities. The U.S. NOLs and UK carryforward tax 

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

losses may become subject to an annual limitation in the event of certain cumulative changes in the ownership interest 
of significant shareholders, as defined under Section 382 Internal Revenue Code, as well as CTA 2010 Part 14 under 
the UK tax rules. This could limit the amount of NOLs and carryforward tax losses that the Company can utilize 
annually to offset future taxable income or tax liabilities. As of December 31, 2019, the Company had performed such 
an analysis and determined that there were no limitations in the UK. However, for U.S. purposes, the Company 
determined that a change of ownership occurred in April 2016 and again in June 2018.  The Company is still in the 
process of determining the annual limitation on losses that occurred prior to June 2018.  Netherlands has anti-abuse 
rules that potentially restrict the use of NOLs in certain change of control situations. Subsequent ownership changes 
and proposed future changes to the UK, the U.S. or the Netherlands tax rules in respect of the utilization of losses 
carried forward may further affect the limitation in future years, if any. The Company has completed a study on the 
completeness of the U.S. orphan drug and research and development credit and the results are included in the income 
tax footnote in 2020.

The Company's pre-tax earnings are as follows:

United Kingdom
United States
Netherlands
Ireland

    December 31, 2020     December 31, 2019
$ (41,372,993) $ (37,993,537)
(16,303,213)
(449,485)
—
$ (57,992,004) $ (54,746,235)

(13,472,052)
(2,471,442)
(675,517)

The Company is subject to the corporate tax rate in the UK as a limited UK corporation.

The following table summarizes a reconciliation of income tax benefit compared with the amounts at the UK statutory
income tax rate:

Statutory rate
Permanent differences - other
RTP and other adjustment
State and local rate, net of federal tax
U.K. tax credit
U.S. tax credit
Foreign tax rate differential
UK rate change (19% & 17% at expected DTA
turn)
US state rate change
Change in valuation allowance
Actual income tax benefit effective tax rate

19.00 %  
(3.41)%  
3.68 %  
2.55 %  
(0.99)%  
2.14 %  
0.44 %  

3.85 %  
(0.04)%  
(27.22)%  
0.00 %  

December 31, 2019     
(10,401,785) 
(411,651) 
3,068,999
(2,041,097) 
1,278,072
(1,257,481)
(347,301)

362,092  

—

9,750,152  
—  

19.00 %
0.75 %
(5.61)%  
3.73 %
(2.33)%  
2.30 %  
0.63 %  

(0.66)%
- %  
(17.81)%
0.00 %

     December 31, 2020     

(11,018,481) 
1,976,028  
(2,135,978)
(1,478,111) 
574,161
(1,242,356)
(254,199)

(2,233,752) 
25,041

15,787,647  
—  

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The Expense/(Benefit) for income taxes from continuing operations consists of the following:

Current Tax Expense/(Benefit)
United Kingdom
United States
Netherlands
Ireland
Total Current
Deferred Tax Expense/(Benefit)
United Kingdom
United States
Netherlands
Ireland
Total Deferred
Change in Valuation Allowance
Total Income Tax Expense/(Benefit)

Deferred Tax Assets/(Liabilities)

Deferred Tax Assets:

Net operating loss carryforwards
Lease liability
R&D credit
Share-based compensation
Other

Deferred tax assets

Deferred Tax Liabilities:

Indefinite-lived intangibles
Depreciation
Right of use assets

Less: valuation allowance
Net deferred tax liability

    December 31, 2020    December 31, 2019

—  
—  
—  
—
—  

—
—
—
—
—

(9,197,319) 
(5,851,708) 
(674,817) 
(63,803)
(15,787,647) 
15,787,647  
—  

(3,036,498)
(6,631,936)
(81,718)
—
(9,750,152)
9,750,152
—

December 31, 2020

December 31, 2019

$

$

43,831,308
6,150,436
5,819,100
5,392,358
298,462
61,491,664

(173,431)
(2,252,190)
(5,928,527)
(53,310,947)
(173,431)

$

$

31,929,792
6,012,466
2,635,188
2,831,696
374,507
43,783,649

(173,431)
(624,361)
(5,635,987)
(37,523,301)
(173,431)

ASC 740 requires a valuation allowance to reduce the deferred tax assets reported if, based on the weight of available
evidence, it is more likely than not that some portion or all of the deferred tax assets will not be realized. After
consideration of all the evidence, both positive and negative, the Company has recorded a full valuation allowance,
after consideration of the reversal of the deferred tax liabilities for the ROU assets and fixed assets, against its deferred
tax assets at December 31, 2020 and 2019 because the Company's management has determined that is it more likely
than not that these assets will not be fully realized.

Changes to the UK corporation tax rates have been announced which will impact future accounting periods. In his
budget of July 8, 2015, the Chancellor of the Exchequer announced a reduction in the UK corporation tax rate to 19%
for the financial year beginning April 1, 2017 and a further reduction to 18% for the financial year beginning April 1,
2020.  These changes received Royal Assent on November 18, 2015.   The UK Finance Act 2016 provides for a further
reduction in the corporation tax rate to 17% for the financial year beginning April 1, 2020.  This change was enacted
on September 15, 2016. The UK had previously enacted its statutory rate to be reduced to 17% as of

F-28

 
   
  
 
 
 
 
 
   
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

April 1, 2020, but amending legislation was enacted in 2020 such that this reduction did not take effect. As the 
Company does not expect to be able to utilize its carryforward tax losses in the UK prior to its financial year beginning 
on January 1, 2021, if at all, the deferred tax has been calculated using a tax rate of 19%.

As of December 31, 2020 and 2019, the Company recorded unrecognized tax positions of $512,785 and zero
respectively. The unrecognized tax positions are netted with deferred tax assets above with full valuation allowance.
The changes to unrecognized tax positions for 2020 and 2019 were as follows:

Unrecognized tax benefits as of January 1
Gross increases/(decreases) related to current year
Gross increases/(decreases) related to prior years
Foreign currency translation
Unrecognized tax positions as of December 31

     December 31, 2020     December 31, 2019
—
—   $
  $
—
—
—
—

—
512,785   $

138,040  
374,745  

  $

The Company will recognize interest and penalties related to uncertain tax positions in income tax expense. As of
December 31, 2020 and 2019, the Company had no accrued interest or penalties related to uncertain tax positions and
no amounts have been recognized in the Company's statements of operations and comprehensive loss.

The Company files income tax returns in the United States, UK, Netherlands and Ireland and various state 
jurisdictions.  In the U.S., all years remain subject to examination.  The earliest year subject to the statute of limitations 
in the UK is 2018.  The statute of limitations in the Netherlands is generally 5 years after the end of the taxable year.  
In Ireland, the Irish Revenue may undertake an audit of a company’s tax return within a period of four years from the 
end of the accounting period in which the return is submitted.

MeiraGTx Holdings plc is a UK tax resident with no earnings in its foreign subsidiaries and the Company does not 
expect any temporary basis difference in its investment in these subsidiaries to reverse in the foreseeable future.  
Therefore, the Company has not recorded deferred taxes on the outside basis difference in its foreign subsidiaries.  It is 
not probable to compute the amounts, if any.

New Tax Legislation

Many governments have enacted or are currently contemplating economic stimulus and financial aid measures. Many
of these measures include deferring the due dates for tax payments, including both income tax and other taxes. The
Coronavirus Aid, Relief, and Economic Security Act ("CARES Act") was enacted on March 27, 2020 in the United
States to address the economic impacts of the COVID-19 pandemic. The CARES Act includes corporate income tax,
payroll tax, and other provisions. While the Company may receive financial, tax, or other benefits under the bill, this
legislation did not impact the Company during the year ended December 31, 2020.

11.  Related Party Transactions

Collaboration and License Agreements

Janssen Pharmaceuticals, Inc.

On January 30, 2019, the Company entered into a Collaboration Agreement with Janssen for the research,
development and commercialization of gene therapies for the treatment of IRD. Under the agreement, Janssen paid the
Company a non-refundable upfront fee of $100.0 million. Janssen and the Company will collaborate to develop the
Company’s current clinical programs in retinitis pigmentosa and two genetic forms of achromatopsia and

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Janssen has the exclusive right to commercialize these three product candidates (“Clinical IRD Product Candidates”)
globally.

Pursuant to the Collaboration Agreement, the Company and Janssen also agreed on a research collaboration to develop
a pipeline of preclinical inherited retinal disease gene therapy candidates (“Research IRD Product Candidates”). The
parties will select and prioritize the Research IRD Product Candidates and Janssen has the right to opt-in for a fee for
each of the specified targets (each an “Option Target”) to obtain certain development, manufacturing and
commercialization rights for the Research IRD Product Candidates.

Unless terminated earlier under certain termination clauses, the Collaboration Agreement will continue in effect, on a
product-by-product and country-by-country basis, until such time as the royalty terms expire in such country. The
Company has determined enforceable rights exist in the Collaboration Agreement as the termination clauses are
substantive termination penalties by way of the non-refundable upfront fee and the reversion of any licensed
intellectual property granted to Janssen upon the termination of the agreement.

On February 27, 2019, in connection with a private placement, the Company issued 2,898,550 ordinary shares to
JJDC, the investment arm of Johnson and Johnson and owner of Janssen, on the same terms and conditions as the
other investors in the offering. After the offering, JJDC became a related party.

Clinical IRD Product Candidates

Under the Collaboration Agreement, the Company and Janssen will jointly develop Clinical IRD Product Candidates
to permit Janssen to commercialize such Clinical IRD Product Candidates under an exclusive license from the
Company. In general, the Company will have the primary responsibility to develop each Clinical IRD Product
Candidate in accordance with the development plan for each Clinical IRD Product Candidate, including where
applicable, conducting any necessary research in order to submit the applicable regulatory filings to regulatory
authorities. The Company will manufacture these products in its cGMP manufacturing facilities for both clinical and
commercial supply. Janssen will pay 100% of the clinical and commercialization costs of the products and the
Company is eligible to receive untiered 20% royalties on net sales of products and additional development and
commercialization milestones up to $340.0 million.

Research IRD Product Candidates

Under the Collaboration Agreement, the Company and Janssen will collaborate to develop Research IRD Product
Candidates, with Janssen paying for the majority of the research costs. Janssen has the right to exclusively license any
product coming out of the collaboration at the time of an investigational new drug application for an additional fee for
each Research IRD Product Candidate. Janssen will then pay 100% of the clinical and commercialization costs for
these Research IRD Product Candidates and the Company will receive an untiered royalty on net sales in the high
teens as well as development milestones for each Research IRD Product Candidate.

Revenue Recognition under the Collaboration Agreement

The Collaboration Agreement is accounted for under ASC 808, however, ASC 808 does not address recognition or
measurement matters. Therefore, the Company will account for the recognition and measurement of consideration
under ASC 606. In determining the appropriate amount of revenue to be recognized under ASC 606, the Company
performed the following steps: (i) identified the promised goods or services in the contract; (ii) determined whether the
promised goods or services are performance obligations including whether they are distinct in the context of the
contract; (iii) measurement of the transaction price, including the constraint on variable consideration; (iv) allocation
of the transaction price to the performance obligations; and (v) recognition of revenue when (or as) the Company
satisfies each performance obligation. The Company evaluated the potential performance obligations in the contract,
which included the exclusive license to Clinical IRD Product Candidates, the research, development

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

and manufacturing services (“the services”), and the participation in various joint committees and determined that
none of the performance obligations by themselves were distinct. Goods and services that are not distinct are bundled
with other goods or services in the contract until a bundle of goods or services that is distinct is created. The services,
when combined with the licenses, represent a bundle and should be accounted for as a single performance obligation
due to the relevance of the services to the value of the early-stage license and the potential for the intellectual property
to be significantly modified during the services period. The Company also evaluated whether or not the right to
purchase exclusive option rights for specified Research IRD Product Candidates represents future performance
obligations and concluded that these represent a separate buyer decision at market rates, rather than a material right
performance obligation. As such, these options have been excluded from the initial allocation of transaction price and
the Company will account for these options as separate contracts when and if Janssen elects to exercise the options.

Under ASC 606, the Company recognized collaboration revenue using the cost-to-cost input method, which it believes
best depicts the transfer of control to the customer. Under the cost-to-cost input method, the extent of progress towards
completion is measured based on the ratio of actual costs incurred to the total estimated costs expected upon satisfying
the combined performance obligation by the potential product candidate. Under this method, revenue is being recorded
as a percentage of the estimated transaction price based on the extent of progress towards completion. Under ASC 606,
the estimated transaction price includes variable consideration subject to constraints. The Company does not include
variable consideration to the extent that it is probable that a significant reversal in the amount of cumulative revenue
recognized will occur when any uncertainty associated with the variable consideration is resolved. The estimate of the
Company’s measure of progress and estimate of variable consideration to be included in the transaction price will be
updated at each reporting date as a change in estimate. The amount related to the unsatisfied portion will be recognized
as that portion is satisfied over time.

Under ASC 606 the Company accounts for (i) the licenses it conveyed with respect to the Clinical IRD Product
Candidates and (ii) its obligations to perform services as a single performance obligation under the Collaboration
Agreement with Janssen on a product candidate basis. Janssen’s right to purchase exclusive options to obtain certain
development, manufacturing and commercialization rights are accounted for separately as they do not represent
material rights, based on the criteria of ASC 606. Upon the exercise of any purchased option by Janssen, the contract
promises associated with an Option Target would use a separate cost-to-cost model for purposes of revenue
recognition under ASC 606.

During the year ended December 31, 2019, the Company received a $100.0 million non-refundable upfront fee from
Janssen and allocated this amount plus other variable consideration not subject to constraint to each identified
performance obligation using a combination of methods allowable under ASC 606. The Company applies the practical
expedient in Topic 606 and does not include disclosures regarding amounts for variable consideration allocated to
wholly-unsatisfied performance obligations or wholly-unsatisfied distinct goods that form part of a single performance
obligation, if any. This variable consideration includes expected reimbursement of research and development costs.

During the years ended December 31, 2020 and 2019, the Company recognized $15,562,985 and $13,291,956,
respectively, of the deferred revenue – related party as license revenue.

The Company also recognized $63,003,824 and $27,296,062 during the years ended December 31, 2020 and 2019,
respectively, related to the reimbursement of research and development expenses, of which $57,407,089 and
$27,296,062, respectively, was recorded as an offset to research and development expenses and $5,596,735 and $0,
respectively, was recorded as an offset to prepaid expenses.

As of December 31, 2020, the Company expects to recognize the remaining $72,841,777 in deferred revenue
associated with the non-refundable upfront fee over the estimated research and development period using the cost-to-
cost input method over an estimated period of approximately 4.5 years.

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

A summary of the deferred revenue recognition is as follows:

Non-refundable upfront fee from Janssen
Deferred revenue recognized as license revenue during the year ended December 31, 2019
Effects of exchange rate
Deferred revenue at December 31, 2019
Deferred revenue recognized as license revenue during the year ended December 31, 2020
Effects of exchange rate
Deferred revenue at December 31, 2020

    $ 100,000,000
(13,291,956)
(493,953)
86,214,091
(15,562,985)
2,190,671
$ 72,841,777

Riboswitch Research Collaboration Agreement

On October 16, 2018, the Company entered into a riboswitch research collaboration agreement with Janssen to
develop regulatable gene therapy treatment using the Company’s proprietary riboswitch technology. As part of the
agreement, the Company will use its proprietary riboswitch technology to engineer regulatable gene therapy constructs
encoding proprietary gene sequences from Janssen.

Upon execution of the agreement, Janssen paid the stage 1 fee in the amount of $658,667, and such payment was
recorded as deferred revenue – related party. The stage 1 fee was being amortized over the estimated research term of
eight months. During the year ended December 31, 2019, the Company amortized the remaining $444,399 of the
deferred revenue, which was recorded as an offset to research and development expenses. Additionally, the stage two
fee, in the amount of $328,524 was recorded and fully amortized during the year ended December 31, 2019.

Research Agreement

Effective October 23, 2016, the Company entered into a four-year master services agreement with UCL Consultants 
Limited, an entity affiliated with University College of London (“UCL”), which is a shareholder of the Company. In 
October 2020, the master services agreement was extended for an additional four years.  Pursuant to a task order to the 
master services agreement, UCL Consultants Limited had provided pre-clinical research and development under the 
direction of the Company.  The services rendered under the task order were completed in 2020. 

Total research and development expenses under this agreement for the years ended December 31, 2020 and 2019 was
approximately $203,000 and $306,000, respectively.

There are currently no future obligations under the agreement as of December 31, 2020. The amount due to UCL
under the master services agreement at December 31, 2020 and 2019 is $0 and $166,404, respectively, and is included
in accounts payable and accrued expenses on the Company’s consolidated balance sheets.

License Agreement

Effective February 4, 2015, the Company entered into an exclusive worldwide license agreement with UCL Business,
PLC (“UCL Business”) to develop up to eight programs using certain ocular gene therapy technology. Under the terms
of the agreement, the Company had agreed to pay UCL Business certain sales milestone payments, if achieved, in the
aggregate amount of £39.8 million, or approximately $54.4 million using the exchange rate at December 31, 2020, and
royalties on net sales, as defined upon commercialization. Additionally, the Company is responsible for all patent
prosecution and maintenance costs incurred and has also agreed to pay UCL Business an annual maintenance fee of
£50,000, or approximately $66,000, until the first commercial sale of a product. The agreement terminates upon the
later of (i) the last valid claim in a relevant product, (ii) the expiration of regulatory exclusivity to all licensed
products, or (iii) the 10th anniversary of the first commercial sale of a product.

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

On July 28, 2017, March 15, 2018 and September 7, 2018, the Company entered into additional exclusive worldwide
license agreements with UCL Business under the same terms as the February 4, 2015 worldwide license agreement.

In January and February 2019, the Company amended and restated the following agreements: (i) the License
Agreement, dated February 4, 2015, as amended, between the Company and UCL Business; (ii) the License
Agreement, dated July 28, 2017, as amended, between the Company and UCL Business; and (iii) the License
Agreement, dated March 15, 2018, between the Company and UCL Business to establish new stand-alone license
agreements for the following inherited retinal disease programs: (a) achromatopsia (“ACHM”) caused by mutations in
CNGB3; (b) ACHM caused by mutations in CNGA3; (c) X-linked retinitis pigmentosa (“XLRP”); and (d) RPE65-
mediated IRD.

The Company’s obligation to pay UCL Business a share of certain sublicensing revenues, as was provided under the
February 4, 2015 agreement, has been removed from each of the stand-alone agreements with respect to the IRD
programs listed above. Each of the stand-alone agreements now reflects terms substantially similar to those of the
February 4, 2015 agreement.

Additionally, under the new stand-alone agreement related to CNGB3 the Company paid UCL Business an upfront
payment of £1,500,000, or approximately $1,976,000, and issued 158,832 of the Company’s ordinary shares, which
were valued at £1,500,000, or approximately $1,966,000.

Effective March 23, 2020, the Company entered into another worldwide license agreement with UCL Business, to
develop an additional ocular gene therapy technology. Under the terms of the agreement, the Company agreed to pay
UCL Business certain development and sales milestone payments, if achieved, in the aggregate amount of $39.25
million and royalties on net sales, as defined upon commercialization. Additionally, the Company is responsible for all
patent prosecution and maintenance costs incurred and also agreed to pay UCL Business an upfront payment of
$50,000 and an annual maintenance fee of $25,000 until the first commercial sale of a product. The agreement
terminates upon the later of (i) the last valid claim in a relevant product, or (ii) the 10th anniversary of the first
commercial sale of a product.

The Company incurred research and development expenses under the agreements in the amount of $273,180 and
$4,271,275, inclusive of the amendment payments of approximately $0, and $3,942,000 during the years ended
December 31, 2020 and 2019, respectively.

Leases

ARE Lease

Effective July 1, 2016, the Company entered into a non-cancellable operating lease (the ”ARE Lease”) for laboratory
and related office facilities in New York with ARE-East River Science Park, LLC (“ARE”), an entity that is under
common control by an entity that is a minority shareholder of the Company and whose executive chairman and
founder is a director of the Company. The ARE Lease provided for monthly base rent and property management fees,
including rent escalations and rent holidays, plus operating expenses during the lease term, which was scheduled to
expire on December 31, 2021. The Company recorded monthly rent expense on a straight-line basis from July 1, 2016
through February 29, 2020, the date the ARE Lease was terminated as described below.

On January 28, 2020, the Company and ARE mutually agreed to terminate the lease with no further obligation for 
either party effective as of February 29, 2020.  Accordingly, the remaining right of use asset and operating lease 
liability in the amount of $825,888 and $969,478, respectively, was written off which resulted in a gain of $143,590.

F-33

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Total rent expense under this operating lease was $81,260 and $487,555 for the years ended December 31, 2020 and
2019, respectively.

In connection with the signing of this lease, the Company entered into a standby letter of credit agreement for
$122,866, which served as a security deposit for the premises. The standby letter of credit was released in May 2020.

Kadmon Lease

The Company leases office space on a month-to-month basis from Kadmon Corporation, LLC (“Kadmon”).

During the years ended December 31, 2020 and 2019, the Company incurred rent charges from Kadmon in the amount
of $597,740 and $576,404, respectively, which are included in loss from operations.

During the years ended December 31, 2020 and 2019, the Company made cash payments totaling $597,740 and
$576,404, respectively, to Kadmon. There were no amounts due to Kadmon at December 31, 2020 and 2019.

12.  Leases

The Company has commitments under operating leases for laboratory, warehouse, clinical trial sites and office space.
The Company also has finance leases for manufacturing space and office equipment. The Company’s leases have
initial lease terms ranging from 3 years to 191 years. Certain lease agreements contain provisions for future rent
increases. Payments due under the lease contracts include fixed payments.

Total rent expense recorded under these leases was $3,341,535 and $1,776,631 for the years ended December 31, 2020
and 2019, respectively.

As of December 31, 2020, the Company has short term lease commitments amounting to approximately $56,000 on a
monthly basis for two leases for office space that are month-to-month leases.

On August 4, 2020, Meira Ireland entered into two agreements (the “Agreements”) with Shannon Commercial
Enterprises DAC trading as Shannon Commercial Properties, to acquire two properties in the Shannon Free Zone in
Shannon, Ireland for an aggregate price of €18 million, or approximately $21.2 million. These properties will serve as
the Company’s second cGMP viral vector manufacturing facility and its first cGMP plasmid and DNA production
facility.

The closing for the first building occurred on August 27, 2020. The total cost of the first building, including taxes and
legal fees, was €11,890,000, or approximately $13,801,007, and has been recorded as a right of use asset in the 
consolidated balance sheets as of December 31, 2020.  There is no corresponding lease liability as the Company paid 
the full cost on the date of the closing. 

The closing for the second building occurred in January 2021. At the closings, Meira Ireland entered into a lease for
each property providing for a long leasehold interest of approximately 191 years.

The leases also include customary terms and conditions, with a nominal annual lease cost and annual maintenance fees
of approximately €31,000, or approximately $37,000, in the aggregate, which amount is subject to change depending
on the annual maintenance costs within the Shannon Free Zone development.

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The components of lease cost for the years ended December 31, 2020 and 2019 are as follows:

Finance lease cost
Amortization of right-of-use assets
Interest on lease liabilities
Total finance lease cost
Operating lease cost
Short-term lease cost
Total lease cost

2020

2019

$

$

519,379
3,081
522,460
3,422,795
714,172
4,659,427

$

$

300,229
2,409
302,638
2,384,048
1,282,709
3,969,395

Amounts reported in the consolidated balance sheets for leases where the Company is the lessee as of December 31,
2020 and 2019 were as follows:

Operating leases
Right-of-use asset
Capitalized lease obligations
Finance leases
Right-of-use asset
Capitalized lease obligations
Weighted-average remaining lease term
Operating leases
Finance leases
Weighted-average discount rate
Operating leases
Finance leases

     December 31,

       December 31,

2020

2019

$
$

$
$

21,485,924
22,220,515

21,596,435
28,325

$
$

$
$

21,857,600
23,127,813

7,144,848
50,737

7.0 years
175.1 years

8.6 %  
8.0 %  

7.9 years
107.0 years

8.5 %  
7.3 %  

Other information related to leases as of the years ended December 31, 2020 and 2019 are as follows:

Cash paid for amounts included in the measurement of
lease liabilities
Operating cash flows from finance leases
Operating cash flows from operating leases
Financing cash flows from finance leases

Right-of-use assets obtained in exchange for lease
liabilities
Operating leases
Finance leases

$
$
$

$
$

F-35

2020

2019

21,604
3,790,734
3,081

$
$
$

28,187
1,246,169
2,355

1,889,065

$ 23,279,980
44,629

— $

   
  
 
 
 
 
 
 
 
 
  
  
 
    
  
  
 
  
 
  
 
  
 
  
 
 
 
 
 
  
 
  
 
 
 
 
 
       
  
 
  
 
  
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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Future minimum lease payments under non-cancellable leases as of December 31, 2020 are as follows:

2021
2022
2023
2024
2025
Thereafter
Total undiscounted lease payments
Less: Imputed interest
Total lease liabilities

     Operating Leases    

$

4,383,995
4,475,018
4,566,431
4,405,144
4,381,270
7,151,280
$ 29,363,138
(7,142,623)
$ 22,220,515

13.  Commitments

Service Agreements

 Finance Leases 
17,505
$
13,129
—
—
—
—
30,634
(2,309)
28,325

$

$

On April 27, 2015, the Company entered into service agreements with two senior officers of the Company. Under the
terms of the agreements, the employees will receive aggregate compensation of £300,000 per year, which was
increased to a maximum aggregate amount of £430,000 per year, or approximately $587,000, for the year ended 
December 31, 2020.  The agreements also provide for contributions to a defined contribution pension plan to be set up 
by the Company and a discretionary bonus. The agreements may be terminated at any time by either party by giving 
twelve-months’ notice, or the Company may terminate the officer’s employment effective immediately upon notice, 
and within 28 days after making payment in lieu of notice consisting of a sum equivalent to the officer’s annual salary 
for the relevant period.  In May 2019 one of the senior officers resigned from the Company and in May 2020, the 
resignation became effective. For the years ended December 31, 2020 and 2019, the Company recorded £935,958 and
£944,500 or approximately $1,278,425 and $1,234,000, respectively, in research and development costs under these 
agreements.  Future obligations to be paid under the remaining agreement equals £120,000, or approximately $164,000
at December 31, 2020.

Employment Agreements

In February 2016, the Company entered into three-year employment agreements with certain senior officers of the
Company. Under the terms of the agreements, which automatically renew for successive one-year terms, the
employees will receive annual compensation in the aggregate amount of $710,000, which has been increased to a
maximum aggregate amount of $1,075,000 per year. The employment agreements also provide for an annual
guaranteed cash bonus targeted at 100% of annual compensation. The agreements also provide for discretionary annual
performance bonuses targeted to be not less than 50-60% of the employee’s base salary and grants of restricted shares.  

Bonuses granted to the senior officers, which included their guaranteed and discretionary bonuses, for the years ended
December 31, 2020 and 2019, in the aggregate amount of $3,300,000 and $5,403,000, respectively.

The employees are also entitled to participate in all incentive and deferred compensation and employee benefit
programs available to employees and executive officers of the Company.

Future obligations to be paid under these employment agreements equal $2,418,750, as of December 31, 2020.

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Research Agreements

MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Effective December 5, 2016, the Company entered into a three-year research collaboration agreement with Cornell 
University.  Pursuant to the agreement, Cornell University provides research and development under the direction of 
the Company.  In connection with the agreement, in July 2017, the Company issued 6,441 ordinary shares to Cornell
University, which were recorded as research and development expenses in the amount of $17,000. The Company
amended this agreement, effective June 12, 2017, to add a second three-year research collaboration project through 
September 2019. The Company further amended this agreement, effective October 18, 2018 to include additional costs 
related to the research.  Total research and development expenses under this agreement, as amended, for the years 
ended December 31, 2020 and 2019 were $379,478 and $1,756,487, respectively.  There are no future obligations to be 
paid under the agreements.

License Agreements

On September 7, 2018, the Company entered into an exclusive licensing agreement with the National Institutes of
Health for worldwide rights to expanded indications for use of AAV-AQP1 for treatment of xerostomia (dry mouth)
and xerophthalmia (dry eye) associated with Sjögren's syndrome.  This agreement expands the Company’s original 
exclusive licensing agreement with the NIH for exclusive worldwide rights to AAV-AQP1 that was executed as of 
November 9, 2017. AAV-AQP1 is currently in Phase 1/2 development for treatment of grade 2 or 3 radiation-induced 
xerostomia.  Total research and development expenses under the agreement for the years ended December 31, 2020 
and 2019 were $0 and $60,000, respectively.

Effective January 1, 2016, the Company acquired all of the outstanding shares of BRI-Alzan from the shareholders of 
BRI-Alzan.  In connection with the Agreement, the Company will pay certain development milestone payments if 
achieved, in the aggregate amount of $4.5 million, and annual royalty payments on annual net sales following the first
commercial sale of any product containing the technology acquired. Total research and development expenses under
the agreement were $15,000 for each of the years ended December 31, 2020 and 2019.

14.  Employee Benefit Plans

United States

On January 1, 2017, Meira LLC adopted a defined contribution retirement plan that complies with Section 401(k) of
the Internal Revenue Code. All Meira LLC employees over the age of 21 are eligible to participate in the plan after
three consecutive months of service. Employees are able to defer a portion of their pay into the plan on the first day of
the month or after the day all age and service requirements have been met. The plan provides for a Company matching
contribution. All eligible employees receive an employer matching contribution equal to the lesser of the amount the
employee contributes to the plan or 6% of their salary up to the annual IRS limit.

United Kingdom

On August 1, 2016, Meira UK II adopted a defined contribution group personal pension plan that complies with
HMRC for tax relief. All Meira UK II employees are eligible to participate in the plan upon joining the company and
providing the required services. All eligible employees, if they elect to join the pension scheme, receive an employer
pension contribution equal to 7.5% to 10.0% of their pensionable earnings. Currently, employees are not required to
contribute, but may make optional contributions up to the annual allowance HMRC limits.

F-37

Table of Contents

Netherlands

MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Meira Netherlands operates a defined contribution pension.  All of its employees participate in the plan.  All eligible 
employees receive an employer pension contribution and are also required to contribute.

Ireland

On November 20, 2020, MeiraGTx Ireland adopted a defined contribution pension plan.  All MeiraGTx Ireland 
employees are eligible to participate in the plan upon joining the Company. All eligible employees, if they elect to join 
the pension scheme, receive an employer pension contribution. The Company’s current contribution, exclusive of an 
employee match, is 4.5%, which exceeds Revenue Ireland requirements.

During the years ended December 31, 2020 and 2019, employer contributions to all plans were $1,089,657 and
$604,294, respectively.

15.  Subsequent Events

Visiogene LLC

On January 4, 2021, the Company and Visiogene LLC (“Visiogene”) entered into a License and Investment Agreement
for an exclusive, worldwide license to certain of Visiogene’s intellectual property relating to ocular gene therapy and
acquired Visiogene preferred units for total consideration of $5.0 million in cash, with the majority of such payment
being allocated toward the research and development of novel products, and the issuance to Visiogene of 75,000
ordinary shares of the Company.

F-38

Table of Contents

ITEM 9.
FINANCIAL DISCLOSURE

CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND

Not Applicable.

ITEM 9A.

CONTROLS AND PROCEDURES

Limitations on Effectiveness of Controls and Procedures

In designing and evaluating our disclosure controls and procedures, management recognizes that any controls and 

procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired 
control objectives.  In addition, the design of disclosure controls and procedures must reflect the fact that there are resource 
constraints and that management is required to apply judgment in evaluating the benefits of possible controls and 
procedures relative to their costs.

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer (principal executive officer) and Chief 

Financial Officer (principal financial officer), evaluated, as of the end of the period covered by this Form 10-K, the 
effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities 
Exchange Act of 1934, as amended (the “Exchange Act”)).  Based on that evaluation, our Chief Executive Officer 
(principal executive officer) and Chief Financial Officer (principal financial officer) concluded that our disclosure controls 
and procedures were effective at the reasonable assurance level at the end of the period covered by this Form 10-K.

Management’s Report on Internal Control Over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting, as

defined in Exchange Act Rule 13a-15(f). Our internal control over financial reporting is a process designed under the
supervision of our Chief Executive Officer and Chief Financial Officer, and affected by our board of directors,
management and other personnel, to provide reasonable assurance regarding the reliability of financial reporting and the
preparation of our financial statements for external reporting purposes in accordance with U.S. GAAP and includes policies
and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the
transactions and dispositions of our assets, (ii) provide reasonable assurance that transactions are recorded as necessary to
permit preparation of financial statements in accordance with U.S. GAAP, and that our receipts and expenditures are being
made only in accordance with authorizations of our management and directors and (iii) provide reasonable assurance
regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a
material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect

misstatements. Also, projections of any evaluation of the effectiveness to future periods are subject to the risk that controls
may become inadequate because of changes in conditions, or that the degree of compliance with policies and procedures
may deteriorate.

Management assessed the effectiveness of our internal control over financial reporting as of December 31, 2020.

In making this assessment, management used the criteria set forth by the Committee of Sponsoring Organizations of the
Treadway Commission (COSO) in Internal Control—Integrated Framework (2013). Based on its assessment and those
criteria, management has concluded that we maintained effective internal control over financial reporting as of December
31, 2020.

119

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Exemption from Attestation Report of the Registered Public Accounting Firm on Internal Control Over Financial
Reporting

This Form 10-K does not include an attestation report on our internal control over financial reporting from our
independent registered public accounting firm since we qualify as an “emerging growth company” as defined under the
JOBS Act.

Changes in Internal Control Over Financial Reporting

There were no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-

15(f) under the Exchange Act) during the quarter ended December 31, 2020 that have materially affected, or are reasonably
likely to materially affect, our internal control over financial reporting.

ITEM 9B.

OTHER INFORMATION

Not applicable.

120

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PART III

ITEM 10.

DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

The information required by this Item is incorporated by reference to our definitive proxy statement for our 2021

annual shareholder meeting to be filed with the SEC within 120 days of the fiscal year ended December 31, 2020.

ITEM 11.

EXECUTIVE COMPENSATION

The information required by this Item is incorporated by reference to our definitive proxy statement for our 2021

annual shareholder meeting to be filed with the SEC within 120 days of the fiscal year ended December 31, 2020.

ITEM 12.
RELATED STOCKHOLDER MATTERS

SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND

Securities Authorized for Issuance Under Equity Compensation Plans (as of December 31, 2020)

The following table provides information as of December 31, 2020, regarding our ordinary shares that may be

issued under the MeiraGTx Holdings plc 2016 Equity Incentive Plan, as amended (the “2016 Plan”), the MeiraGTx
Holdings plc 2018 Incentive Award Plan (the “2018 Plan”) and the MeiraGTx Holdings plc 2018 Employee Stock
Purchase Plan (the “2018 ESPP”).

Plan category:
Equity compensation plans approved by shareholders  

(a)

Number of Securities  
to be Issued Upon  

Exercise of

  Outstanding Options,  
  Warrants, and Rights  

     Weighted-Average
Exercise Price of
Outstanding
Options,
Warrants, and
Rights
(b)

     Number of Securities
Available for Future
Issuance Under Equity
Compensation Plans
(excludes securities
reflected in column(a))
(c)

2016 Plan(1)
2018 Plan (2)(3)
2018 ESPP (4)

Equity compensation plans not approved by
shareholders

Total

 1,385,192
 3,984,579

$
$
 —  

 —  
$

 5,369,771

 5.45  
 14.43  
 —  

 —  
 11.85  

 —
 1,584,468
 1,150,637

 —
 2,735,105

(1) In connection with our IPO, we assumed the 2016 Plan. As the 2016 Plan was previously approved by our

shareholders and, as we will not make future grants or awards under these plans, it is listed as “approved by
shareholders.” As such, the securities remaining available under the 2016 Plan have been excluded from the table
above.

(2) Pursuant to the terms of the 2018 Plan, the number of ordinary shares available for issuance under the 2018 Plan

automatically increases on each January 1, until and including January 1, 2028, by an amount equal to the lesser of:
(a) 4% of the aggregate number of ordinary shares outstanding on the final day of the immediately preceding
calendar year and (b) such smaller number of ordinary shares as is determined by our board of directors.

(3) The weighted average exercise price of outstanding awards does not take into account the shares issuable upon vesting 

of outstanding restricted share units which have no exercise price.  At December 31, 2020 there were a total of 
545,000 shares subject to restricted share units.

(4) Pursuant to the terms of the 2018 ESPP, the number of ordinary shares available for issuance under the 2018 ESPP
automatically increases on each January 1, until and including January 1, 2028, by an amount equal to the lesser of:
(a) 1% of the aggregate number of ordinary shares outstanding on the final day of the immediately preceding
calendar year and (b) such smaller number of ordinary shares as is determined by our board of directors, subject to the
limit set forth in the 2018 ESPP.

121

    
 
 
 
 
 
 
 
 
 
 
 
   
   
  
 
 
 
 
 
Table of Contents

Other

The remaining information required by this Item is incorporated by reference to our definitive proxy statement for
our 2021 annual shareholder meeting to be filed with the SEC within 120 days of the fiscal year ended December 31, 2020.

ITEM 13.
INDEPENDENCE

CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR

The information required by this Item is incorporated by reference to our definitive proxy statement for our 2021

annual shareholder meeting to be filed with the SEC within 120 days of the fiscal year ended December 31, 2020.

ITEM 14.

PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information required by this Item is incorporated by reference to our definitive proxy statement for our 2021

annual shareholder meeting to be filed with the SEC within 120 days of the fiscal year ended December 31, 2020.

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ITEM 15.

EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

EXHIBIT INDEX

PART IV

Exhibit Number

Exhibit Description

Incorporated by Reference

     Form      File No.

     Exhibit     

Filing
Date

Filed/
Furnished
Herewith

2.1†

3.1

4.1

4.2

4.3

10.1#

10.2#

10.3#

10.4#

10.5

10.6

10.7#

10.8#

10.9#

10.10†

Agreement and Plan of Merger, dated October 5,
2018, by and among MeiraGTx Holdings plc,
Vector Neurosciences Inc., VN Acquisition, Inc.,
VN Acquisition 2, Inc., the Vector stockholders
named therein and the Vector stockholder
representative, Stephen Kaplitt.

Amended and Restated Memorandum and
Articles of Association of the Registrant.

Specimen Share Certificate evidencing the
ordinary shares of the Registrant.

Shareholder Agreement

Description of Securities

2016 Equity Incentive Plan, as amended, and
form of option agreements thereunder.

2018 Incentive Award Plan and forms of award
agreements thereunder.

Non-Employee Director Compensation Program.

Form of Indemnification Agreement for Directors
and Officers.

License and Sub-Lease Agreement, dated
May 31, 2019, between MeiraGTx LLC and
Imclone Systems, LLC.

Lease Agreement, effective February 2, 2016,
among MeiraGTx Limited, Moorfields Eye
Hospital NHS, Foundation Trust and Kadmon
Corporation LLC.

Employment Agreement, dated February 15,
2016, between MeiraGTx Limited and
Alexandria Forbes, Ph.D., as amended.

Employment Agreement, dated February 15,
2016 between MeiraGTx Limited and Richard
Giroux, as amended.

Employment Agreement, dated April 27, 2015,
between MeiraGTx Limited and Stuart Naylor,
Ph.D., as amended

Agreement and Plan of Merger, dated
December 31, 2015, among MeiraGTx
Acquisition Corporation, BRI-Alzan, Inc., F-
Prime Inc., Gregory Petsko, Dagmar Ringe,
Brandeis University and MeiraGTx Limited.

123

*

10-K

001-38520

2.1

3/26/19

10-Q

001-38520

3.1

8/7/19

S-1

333-224914

10-K

001-38520

10-K

001-38520

4.1

4.2

4.3

5/29/18

3/11/20

3/11/20

S-1/A 333-224914

10.1

5/29/18

S-1/A 333-224914

10.2

5/29/18

S-1/A 333-224914

10.4

5/29/18

10-Q

001-38520

10.2

8/7/19

S-1

333-224914

10.6

5/14/18

S-1/A 333-224914

10.7

5/29/18

S-1/A 333-224914

10.8

5/29/18

S-1/A 333-224914

10.9

5/29/18

S-1/A 333-224914

10.14

5/29/18

    
    
Table of Contents

Exhibit Number

Exhibit Description

Incorporated by Reference

10.11#

10.12#

10.13#

10.14#

10.15

10.16

10.17

10.18

10.19†

10. 20†

10. 21†

10. 22†

2018 Employee Share Purchase Plan.

UK Sub-Plan Under the 2018 Incentive Award
Plan.

Form of Option Grant Notice and Option
Agreement Under the UK Sub-Plan to the 2018
Incentive Award Plan.

Form of Change in Control Agreement.

Lease agreement by and between Moorfields Eye
Hospital NHS Foundation Trust and MeiraGTx
UK II Limited, dated July 30, 2018

Lease agreement by and between Moorfields Eye
Hospital NHS Foundation Trust and MeiraGTx
UK II Limited, dated July 30, 2018.

Transfer of Title, dated December 14, 2018, and
Lease, dated October 12, 2001, relating to the
Pharmacy Manufacturing Unit, Britannia Walk,
London, England

Overage Deed, dated December 14, 2018,
between Moorfields Eye Hospital NHS
Foundation Trust and MeiraGTx UK II Limited
relating to the Pharmacy Manufacturing Unit,
Britannia Walk, London, England

Consulting Agreement, dated October 5, 2018,
between MeiraGTx Holdings plc, Vector
Consulting LLC, Michael G. Kaplitt, Matthew
During, and Stephen B. Kaplitt.

License Agreement (RPE65), dated January 29,
2019, as amended and restated by and among
UCL Business PLC, MeiraGTx UK II
Limited and MeiraGTx Limited.

License Agreement (CNGB3), dated January 29,
2019, as amended and restated by and among
UCL Business PLC, MeiraGTx Holdings
plc, MeiraGTx UK II Limited and
MeiraGTx Limited.

License Agreement (CNGA3), dated January 29,
2019, as amended and restated by and among
UCL Business PLC, MeiraGTx UK II
Limited and MeiraGTx Limited.

124

     Form      File No.

S-1/A 333-224914

     Exhibit     
10.15

Filed/
Furnished
Herewith

Filing
Date
5/29/18

10-K

001-38520

10.12

3/26/19

10-K

001-38520

10.13

3/26/19

*

10-Q

001-38520

10.4

8/8/18

10-Q

001-38520

10.5

8/8/18

8-K

001-38520

10.1

12/14/18

8-K

001-38520

10.2

12/14/18

10-K

001-38520

10.19

3/26/19

10-K

001-38520

10.20

3/26/19

10-K

001-38520

10.21

3/26/19

10-K

001-38520

10.22

3/26/19

    
    
Table of Contents

Exhibit Number

Exhibit Description

Incorporated by Reference

     Form      File No.

     Exhibit     

Filing
Date

Filed/
Furnished
Herewith

10. 23†

10. 24†

10. 25†

10. 26†

10.27#

10.28#

10.29

10.30#

10.31#

10.32

10.33

License Agreement (RPGR), dated February 5,
2019, as amended and restated by and among
UCL Business PLC, MeiraGTx UK II
Limited and MeiraGTx Limited.

Amendment No. 4 to Exclusive License
Agreement, dated January 29, 2019, between
UCLB and MeiraGTx Limited.

Collaboration, Option and License Agreement,
dated January 30, 2019, by and among Janssen
Pharmaceuticals, Inc., MeiraGTx UK II Limited
and MeiraGTx Holdings plc.

Registration Rights Agreement, dated
February 26, 2019, by and among MeiraGTx
Holdings plc and the investors named therein.

Employment Agreement, dated March 25, 2019,
between MeiraGTx, LLC and Bruce Gottlieb.

Separation and Release Agreement, dated
January 7, 2020, between MeiraGTx Holdings
plc and Bruce Gottlieb.

Agreement for Lease with Landlord’s
Refurbishment Works, dated May 29, 2019,
between MeiraGTx UK II Limited and Provost 1
Limited and Provost 2 Limited, including agreed
form of Lease between MeiraGTx UK II Limited
and Provost 1 Limited and Provost 2 Limited.

Form of Restricted Share Unit Grant Notice and
Restricted Share Unit Agreement Under the 2018
Incentive Award Plan.

Form of Restricted Share Unit Grant Notice and
Restricted Share Unit Agreement Under the UK
Sub-Plan to the 2018 Incentive Award Plan.

Particulars and Conditions of Sale of Building 2,
Block K, Shannon Free Zone, Shannon, County
Clare, Ireland, dated as of August 4, 2020, by and
between Shannon Commercial Enterprises DAC
trading as Shannon Commercial Properties and
MeiraGTx Ireland DAC, including agreed form
of Lease between Shannon Commercial
Enterprises DAC and MeiraGTx Ireland DAC.

Particulars and Conditions of Sale of Building 3,
Block K, Shannon Free Zone, Shannon, County
Clare, Ireland, dated as of August 4, 2020, by and
between Shannon Commercial Enterprises DAC
trading as Shannon Commercial Properties and
MeiraGTx Ireland DAC, including agreed form
of Lease between Shannon Commercial
Enterprises DAC and MeiraGTx Ireland DAC.

10-K

001-38520

10.23

3/26/19

10-K

001-38520

10.24

3/26/19

10-K

001-38520

10.25

3/26/19

8-K

001-38520

10.2

2/26/19

10-Q

001-38520

10.1

5/14/19

10-Q

001-38520

10.1

5/7/20

10-Q

001-38520

10.3

8/7/19

10-K

001-38520

10.30

3/11/20

10-K

001-38520

10.31

3/11/20

10-Q

001-38520

10.1

11/5/20

10-Q

001-38520

10.2

11/5/20

21

List of Subsidiaries

*

125

    
    
Table of Contents

Exhibit Number

Exhibit Description

Incorporated by Reference

23.1

31.1

31.2

32.1

32.2

101.INS

101.SCH

101.CAL

101.DEF

101.LAB

101.PRE

104

Consent of Ernst & Young LLP

Certification of Chief Executive Officer pursuant
to Rules 13a-14(a)/15d-14(a) under the Securities
Exchange Act of 1934, as amended.

Certification of Chief Financial Officer pursuant
to Rules 13a-14(a)/15d-14(a) under the Securities
Exchange Act of 1934, as amended.

Certification of Chief Executive Officer pursuant
to 18 U.S.C. Section 1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002.

Certification of Chief Financial Officer pursuant
to 18 U.S.C. Section 1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002.

Inline XBRL Instance Document.

Inline XBRL Taxonomy Extension Schema
Document.

Inline XBRL Taxonomy Extension Calculation
Linkbase Document.

Inline XBRL Taxonomy Definition Linkbase
Document.

Inline XBRL Taxonomy Label Linkbase
Document.

Inline XBRL Taxonomy Extension Presentation
Linkbase Document.

Cover Page Interactive Data File (formatted as
Inline XBRL and contained in Exhibit 101)

     Form      File No.

     Exhibit     

Filing
Date

Filed/
Furnished
Herewith
*

*

*

**

**

*

*

*

*

*

*

*

*     Filed herewith
**   Furnished herewith
#     Management contract or compensation plan or arrangement
†     Portions of this exhibit (indicated by asterisks) have been omitted pursuant to a request for confidential treatment

pursuant to Rule 406 under the Securities Act of 1933, as amended

Certain agreements filed as exhibits to this Form 10-K contain representations and warranties that the parties

thereto made to each other. These representations and warranties have been made solely for the benefit of the other parties
to such agreements and may have been qualified by certain information that has been disclosed to the other parties to such
agreements and that may not be reflected in such agreements. In addition, these representations and warranties may be
intended as a way of allocating risks among parties if the statements contained therein prove to be incorrect, rather than as
actual statements of fact. Accordingly, there can be no reliance on any such representations and warranties as
characterizations of the actual state of facts. Moreover, information concerning the subject matter of any such
representations and warranties may have changed since the date of such agreements.

ITEM 16.

FORM 10-K SUMMARY

None.

126

    
    
Table of Contents

Pursuant to the requirements of Section 13 or 15(d) the Securities Exchange Act of 1934, the registrant has duly

caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

SIGNATURES

Date: March 11, 2021

MeiraGTx Holdings plc (Registrant)

By:

/s/ Alexandria Forbes
Alexandria Forbes
President and Chief Executive Officer and
Director (Principal Executive Officer)

127

Table of Contents

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the

following persons on behalf of Registrant and in the capacities and on the dates indicated.

Signature

Title

/s/ Alexandria Forbes, Ph.D

President and Chief Executive Officer and Director
(Principal Executive Officer)

Alexandria Forbes, Ph.D

/s/ Richard Giroux

Richard Giroux

Chief Financial Officer
(Principal Financial and Accounting Officer)

Date

March 11, 2021

March 11, 2021

/s/ Keith R. Harris, Ph.D.

Chairman of the Board and Director

March 11, 2021

Keith R. Harris, Ph.D.

/s/ Martin Indyk

Director

Martin Indyk

/s/ Ellen Hukkelhoven

Director

Ellen Hukkelhoven

/s/ Nicole Seligman

Director

Nicole Seligman

/s/ Arnold J. Levine, Ph.D.

Director

Arnold J. Levine, Ph.D.

/s/ Joel S. Marcus

Director

Joel S. Marcus

/s/ Lord Mendoza

Director

Lord Mendoza

/s/ Thomas E. Shenk, Ph.D.

Director

Thomas E. Shenk, Ph.D.

128

March 11, 2021

March 11, 2021

March 11, 2021

March 11, 2021

March 11, 2021

March 11, 2021

March 11, 2021

MEIRAGTX HOLDINGS PLC

NON-EMPLOYEE DIRECTOR COMPENSATION PROGRAM

Exhibit 10.3

Non-employee  members  of  the  board  of  directors  (the  “Board”)  of  MeiraGTx  Holdings  plc  (the
“Company”)  shall  receive  cash  and  equity  compensation  as  set  forth  in  this  Non-Employee  Director
Compensation Program (this “Program”).  The cash and equity compensation described in this Program shall be
paid  or  be  made,  as  applicable,  automatically  and  without  further  action  of  the  Board,  to  each  member  of  the
Board  who  is  not  an  employee  of  the  Company  or  any  parent  or  subsidiary  of  the  Company  (each,  a  “Non-
Employee  Director”)  who  is  entitled  to  receive  such  cash  or  equity  compensation,  unless  such  Non-Employee
Director  declines  the  receipt  of  such  cash  or  equity  compensation  by  written  notice  to  the  Company.    This
Program shall remain in effect until it is revised or rescinded by further action of the Board.  This Program may be
amended, modified or terminated by the Board at any time in its sole discretion.  The terms and conditions of this
Program shall supersede any prior cash and/or equity compensation arrangements for service as a member of the
Board between the Company and any of its Non-Employee Directors.

I.          CASH COMPENSATION

A.                Annual  Retainers.    Each  Non-Employee  Director  shall  receive  an  annual  retainer  of

$66,000 for service on the Board.

B.         Additional Annual Retainers.  In addition, each Non-Employee Director shall receive the

following annual retainers:

1.         Chairman of the Board or Lead Independent Director.  A Non-Employee Director
serving  as  Chairman  of  the  Board  or  Lead  Independent  Director  shall  receive  an  additional  annual  retainer  of
$30,000 for such service.

2.         Audit Committee.  A Non-Employee Director serving as Chairperson of the Audit
Committee  shall  receive  an  additional  annual  retainer  of  $15,000  for  such  service.  A  Non-Employee  Director
serving as a member other than the Chairperson of the Audit Committee shall receive an additional annual retainer
of $5,000 for such service.

3.         Compensation Committee.  A Non-Employee Director serving as Chairperson of the
Compensation  Committee  shall  receive  an  additional  annual  retainer  of  $10,000  for  such  service.  A  Non-
Employee Director serving as a member other than the Chairperson of the Compensation Committee shall receive
an additional annual retainer of $5,000 for such service.

4.                  Nominating  and  Corporate  Governance  Committee.   A  Non-Employee  Director
serving  as  Chairperson  of  the  Nominating  and  Corporate  Governance  Committee  shall  receive  an  additional
annual  retainer  of  $10,000  for  such  service.  A  Non-Employee  Director  serving  as  a  member  other  than  the
Chairperson of the Nominating and Corporate Governance Committee shall receive an additional annual retainer
of $5,000 for such service.

5.                  Science  and  Technology  Committee.    A  Non-Employee  Director  serving  as
Chairperson of the Science and Technology Committee shall receive an additional annual retainer of $10,000 for
such  service.  A  Non-Employee  Director  serving  as  a  member  other  than  the  Chairperson  of  the  Science  and
Technology Committee shall receive an additional annual retainer of $5,000 for such service.

C.         Payment of Retainers.  The annual retainers described in Sections I(A) and I(B) shall be
earned on a quarterly basis based on a calendar quarter and shall be paid in cash by the Company in arrears not
later than the fifteenth day following the end of each calendar quarter.  In the event a Non-Employee Director does
not  serve  as  a  Non-Employee  Director,  or  in  the  applicable  positions  described  in  Section  I(B),  for  an  entire
calendar  quarter,  the  retainer  paid  to  such  Non-Employee  Director  shall  be  prorated  for  the  portion  of  such
calendar quarter actually served as a Non-Employee Director, or in such position, as applicable.

II.        EQUITY COMPENSATION

Non-Employee Directors shall be granted the equity awards described below.  The awards described below
shall be granted under and shall be subject to the terms and provisions of the Company’s 2018 Incentive Award
Plan or any other applicable Company equity incentive plan then-maintained by the Company (the “Equity Plan”)
and shall be granted subject to award agreements, including attached exhibits, in substantially the form approved
by the Board.  All applicable terms of the Equity Plan apply to this Program as if fully set forth herein, and all
grants  of  options  hereby  are  subject  in  all  respects  to  the  terms  of  the  Equity  Plan  and  the  applicable  award
agreement.

A.        Initial Awards.  Each Non-Employee Director who is initially elected or appointed to the
Board  shall  receive  an  option  to  purchase  50,000  ordinary  shares  of  the  Company  on  the  date  of  such  initial
election or appointment. The awards described in this Section II(A) shall be referred to as “Initial Awards.”  No
Non-Employee Director shall be granted more than one Initial Award.

B.                  Subsequent  Awards.    A  Non-Employee  Director  who  (i)  has  been  serving  as  a  Non-
Employee Director on the Board for at least six months as of the date of any annual meeting of the Company’s
shareholders  and  (ii)  will  continue  to  serve  as  a  Non-Employee  Director  immediately  following  such  meeting,
shall be automatically granted an option to purchase 25,000 ordinary shares of the Company on the date of such
annual meeting.  The awards described in this Section II(B) shall be referred to as “Subsequent Awards.”  For the
avoidance of doubt, a Non-Employee Director elected for the first time to the Board at an annual meeting of the
Company’s shareholders shall only receive an Initial Award in connection with such election, and shall not receive
any Subsequent Award on the date of such meeting as well.

C.                  Termination  of  Employment  of  Employee  Directors.    Members  of  the  Board  who  are
employees  of  the  Company  or  any  parent  or  subsidiary  of  the  Company  who  subsequently  terminate  their
employment with the Company and any parent or subsidiary of the Company and remain on the Board will not
receive an Initial Award pursuant to Section II(A) above, but to the extent that they are otherwise entitled, will
receive, after termination from employment with the

Company and any parent or subsidiary of the Company, Subsequent Awards as described in Section II(B) above.

D.        Terms of Awards Granted to Non-Employee Directors

1.                  Exercise  Price.    The  per  share  exercise  price  of  each  option  granted  to  a  Non-
Employee Director shall equal the Fair Market Value (as defined in the Equity Plan) of an ordinary share on the
date the option is granted.

2.         Vesting.  Each Initial Award shall vest and become exercisable in thirty-six (36)
substantially  equal  monthly  installments  following  the  date  of  grant,  such  that  the  Initial  Award  shall  be  fully
vested on the third anniversary of the date of grant, subject to the Non-Employee Director continuing in service as
a  Non-Employee  Director  through  each  such  vesting  date.    Each  Subsequent  Award  shall  vest  and  become
exercisable on the earlier of the first anniversary of the date of grant or the day immediately prior to the date of the
next annual meeting of the Company’s shareholders occurring after the date of grant, in either case subject to the
Non-Employee  Director  continuing  in  service  on  the  Board  as  a  Non-Employee  Director  through  each  such
vesting date.  Unless the Board otherwise determines, any portion of an Initial Award or Subsequent Award which
is unvested or unexercisable at the time of a Non-Employee Director’s termination of service on the Board as a
Non-Employee Director shall be immediately forfeited upon such termination of service and shall not thereafter
become vested and exercisable.  All of a Non-Employee Director’s Initial Awards and Subsequent Awards shall
vest  in  full  immediately  prior  to  the  occurrence  of  a  Change  in  Control  (as  defined  in  the  Equity  Plan),  to  the
extent outstanding at such time.

hereunder shall be ten (10) years from the date the option is granted.

3.                  Term.   The  maximum  term  of  each  option  granted  to  a  Non-Employee  Director

* * * * *

CHANGE IN CONTROL AGREEMENT

Exhibit 10.14

This  Change  in  Control  Agreement  (“Agreement”)  is  made  effective  as  of  [___________],  by  and  between

[EMPLOYING SUBSIDIARY] (the “Company”) and [_______] (“Executive”).

WHEREAS, Executive is a key employee of the Company;

WHEREAS,  the  Company  recognizes  that  the  possibility  of  a  change  in  control  and  a  related  involuntary
termination raises uncertainty and questions among key employees and can be a distraction to the Executive to the detriment
of the Company, Parent (as defined below) and its shareholders; and

WHEREAS,  the  Company  believes  that  it  is  in  the  best  interests  of  the  Company,  Parent  and  its  shareholders  to
provide the Executive with an incentive to motivate the Executive to maximize the value of the Company upon a Change in
Control  (as  defined  below)  for  the  benefit  of  shareholders,  and  to  induce  the  Executive  to  remain  in  the  employ  of  the
Company.

NOW,  THEREFORE,  in  consideration  of  the  foregoing  recitals  and  the  mutual  promises,  terms,  provisions  and

conditions set forth in this Agreement, the Company and the Executive hereby agree as follows:

1.          Definitions.  For purposes of this Agreement, the following terms shall have the following meanings:

(a)         “Affiliate” means with respect to any person or entity, any other person or entity that, directly or indirectly, through
one or more intermediaries, controls, or is controlled by, or is under common control with, such person or entity. For
purposes of this definition, “control”, when used with respect to any person or entity, means the power to direct the
management  and  policies  of  such  person  or  entity,  directly  or  indirectly,  whether  through  ownership  of  voting
securities, by contract or otherwise, and the terms “controlling” and “controlled” have meanings correlative to the
foregoing.

(b)         “Base Salary” means Executive’s annual base salary at the rate in effect from time to time.

(c)         “Board” means the Board of Directors of Parent.

(d)         “Cause” means any of the following: (i) Executive’s commission of an act of fraud, embezzlement or theft against
the Company or its Affiliates; (ii) Executive’s conviction of, or plea of no contest to, a felony or crime involving
moral turpitude; (iii) Executive’s refusal to perform material duties as an employee of the Company, which to the
extent curable, remains uncured for 30 days following Executive’s receipt of written notice thereof; (iv) Executive’s
material breach of any material policy of the Company or any of its Affiliates that is applicable to Executive or of
any  material  agreement  with  the  Company  or  any  of  its  Affiliates,  including  the  Confidentiality  and  Restrictive
Covenant  Agreements,  which  to  the  extent  curable,  remains  uncured  for  30  days  following  Executive’s  receipt  of
written notice thereof; (v) Executive’s gross negligence, willful misconduct or any other act of willful disregard for
the Company’s or any of its Affiliates’ best interests; or (vi) Executive’s refusal to cooperate with a governmental or
internal  investigation  of  the  Company  or  any  of  its  Affiliates,  or  its  or  their  directors,  officers  or  employees.
Notwithstanding anything in this Agreement or the MeiraGTx Holdings plc 2018 Incentive Award Plan (the “2018
Plan”) to the contrary, this Agreement shall be deemed a “Relevant Agreement” for purposes of the 2018 Plan

such that the definition of “Cause” set forth in this Agreement shall apply over any alternate definition of “Cause”
set forth in the 2018 Plan.

(e)         “Change in Control” means and includes each of the following:

(i)          A transaction or series of transactions (other than an offering of Ordinary Shares to the
general public through a registration statement filed with the Securities and Exchange Commission or a transaction
or series of transactions that meets the requirements of clauses (A) and (B) of subsection (iii) below) whereby any
“person” or related “group” of “persons” (as such terms are used in Sections 13(d) and 14(d)(2) of the Exchange
Act)  (other  than  Parent,  any  of  its  subsidiaries,  an  employee  benefit  plan  maintained  by  Parent  or  any  of  its
subsidiaries or a “person” that, prior to such transaction, directly or indirectly controls, is controlled by, or is under
common control with, Parent) directly or indirectly acquires beneficial ownership (within the meaning of Rule 13d-3
under the Exchange Act) of securities of Parent possessing more than 50% of the total combined voting power of
Parent’s securities outstanding immediately after such acquisition; or

(ii)                  During  any  period  of  two  consecutive  years,  individuals  who,  at  the  beginning  of  such
period, constitute the Board together with any new Director(s) (other than a Director designated by a person who
shall have entered into an agreement with Parent to effect a transaction described in subsections (i) or (iii)) whose
election by the Board or nomination for election by Parent’s shareholders was approved by a vote of at least two-
thirds of the Directors then still in office who either were Directors at the beginning of the two-year period or whose
election or nomination for election was previously so approved, cease for any reason to constitute a majority thereof;
or

(iii)             The  consummation  by  Parent  (whether  directly  involving  Parent  or  indirectly  involving
Parent through one or more intermediaries) of (x) a merger, consolidation, reorganization, or business combination
or  (y)  a  sale  or  other  disposition  of  all  or  substantially  all  of  Parent’s  assets  in  any  single  transaction  or  series  of
related transactions or (z) the acquisition of assets or stock of another entity, in each case other than a transaction:

(A)                which  results  in  Parent’s  voting  securities  outstanding  immediately  before  the  transaction
continuing to represent (either by remaining outstanding or by being converted into voting securities
of Parent or the person that, as a result of the transaction, controls, directly or indirectly, Parent or
owns,  directly  or  indirectly,  all  or  substantially  all  of  Parent’s  assets  or  otherwise  succeeds  to  the
business of Parent (Parent or such person, the “Successor Entity”)) directly or indirectly, at least a
majority  of  the  combined  voting  power  of  the  Successor  Entity’s  outstanding  voting  securities
immediately after the transaction, and

(B)        after which no person or group beneficially owns voting securities representing 50% or more of the
combined voting power of the Successor Entity; provided, however, that no person or group shall be
treated for purposes of this clause (B) as beneficially owning 50% or more of the combined voting
power  of  the  Successor  Entity  solely  as  a  result  of  the  voting  power  held  in  Parent  prior  to  the
consummation of the transaction.

Notwithstanding the foregoing, if a Change in Control constitutes a payment event with respect to any payment or
benefits  (or  portion  thereof)  that  provides  for  the  deferral  of  compensation  that  is  subject  to  Section  409A,  to  the
extent required to avoid the imposition of additional taxes under Section 409A, the transaction or event described in
subsection (i), (ii) or (iii) with respect to such

2

payment  or  benefits  (or  portion  thereof)  shall  only  constitute  a  Change  in  Control  for  purposes  of  the  payment
timing  of  such  payment  or  benefits  if  such  transaction  also  constitutes  a  “change  in  control  event,”  as  defined  in
Treasury Regulation Section 1.409A-3(i)(5).

(f)                  “CIC  Qualifying  Termination”  means  Executive’s  Qualifying  Termination  which  occurs  during  the  period
beginning on the date that is [two (2) weeks] prior to a Change in Control and ending on the date that is [twelve (12)
months]  following  a  Change  in  Control  (the  “Protected  Period”);  provided  that,  with  respect  to  a  Qualifying
Termination that occurs prior to a Change in Control, it is reasonably demonstrated that such termination (i) was at
the request of a third party who had taken steps reasonably calculated or intended to effect such Change in Control,
or  in  the  case  of  termination  by  Executive  for  Good  Reason,  the  circumstance  or  event  which  constitutes  Good
Reason occurs at the direction of such third party or (ii) otherwise arose in connection with or anticipation of such
Change in Control.

(g)         “Code” means the Internal Revenue Code of 1986, as amended, and the Treasury Regulations and other interpretive

guidance thereunder.

(h)                  “Confidentiality  and  Restrictive  Covenant  Agreements”  means  any  non-disclosure,  confidentiality,  invention
assignment, non-competition, non-solicitation or other similar covenant or obligation of Executive under any written
agreement with the Company or any of its Affiliates, as in effect from time to time, including under any employment
agreement.

(i)          “Director” means a Board member.

(j)          “Disability” means, at any time the Company or any of its Affiliates sponsors a long-term disability plan for the
benefit  of  the  Company’s  employees,  “disability”  as  defined  in  such  long-term  disability  plan  for  the  purpose  of
determining  a  participant’s  eligibility  for  benefits,  provided,  however,  if  the  long-term  disability  plan  contains
multiple definitions of disability, “Disability” shall refer to that definition of disability which, if Executive qualified
for  such  disability  benefits,  would  provide  coverage  for  the  longest  period  of  time.  The  determination  of  whether
Executive has a Disability will be made by the person or persons required to make disability determinations under
the  long-term  disability  plan.  If,  at  any  time  the  Company  and  its  Affiliates  do  not  sponsor  a  long-term  disability
plan  for  the  Company’s  employees,  Disability  shall  mean  Executive’s  absence  from  the  full-time  performance  of
Executive’s duties with the Company for 180 consecutive calendar days as a result of incapacity due to mental or
physical  illness  which  is  determined  to  be  total  and  permanent  by  a  physician  selected  by  the  Company  or  its
insurers  and  approved  by  Executive  or  Executive’s  legal  representative  (such  approval  not  to  be  unreasonably
withheld, conditioned or delayed).

(k)         “Exchange Act” means the Securities Exchange Act of 1934, as amended.

(l)          “Good Reason” means the occurrence of any of the following events or conditions without Executive’s written
consent: (i) a decrease of more than 25% in Executive’s Base Salary; (ii) a decrease of more than 25% in Executive’s
Target Bonus Amount; (iii) a material diminution in Executive’s authority, duties or responsibilities as an executive
and/or officer of the Company or the assignment of duties to the Executive inconsistent with those of an executive
and/or  officer  of  the  Company,  other  than  as  a  result  of  a  Change  in  Control  immediately  after  which  Executive
holds a position with the Company or its successor (or any other entity that owns substantially all of the Company’s
business after such sale) that is substantially equivalent with respect to the Company’s business as Executive held
immediately prior to such Change in Control; (iv) a change in the geographic location of Executive’s principal place
of employment to any location that is

3

more than 30 miles from the principal place of Executive’s employment immediately prior to such change; or (v) the
Company’s material breach of a material agreement with Executive, including the Company’s failure to obtain an
agreement from any successor to all or substantially all of the business or assets of the Company or Parent to assume
this  Agreement  as  contemplated  in  Section  6(a);  provided  that  (I)  Executive  must  notify  the  Company  of  the
occurrence of any of the foregoing events or conditions in writing within 90 days of the occurrence of such event,
(II) such event or condition must, if curable, remain uncured for 30 days following the Company’s receipt of such
written notice (the “Cure Period”)  and  (III)  Executive’s  termination  for  Good  Reason  must  occur  within  90  days
following the expiration of the Cure Period.

(m)        “Ordinary Shares” means the ordinary shares of Parent.

(n)         “Parent” means MeiraGTx Holdings plc.

(o)         “Qualifying Termination” means a termination of Executive’s employment with the Company by the Executive for

Good Reason or by the Company other than for Cause, death or Disability.

(p)         “Section 409A” means Section 409A of the Code and the regulations and guidance promulgated thereunder.

(q)         “Target Bonus Amount” means Executive’s target annual bonus amount in effect from time to time.

2.          Severance.

(a)         Severance Upon Qualifying Termination.  If Executive has a CIC Qualifying Termination, then
subject  to  (x)  the  requirements  of  this  Section  2,  (y)  the  Executive’s  continued  compliance  with  the  Confidentiality  and
Restrictive  Covenant  Agreements  and  (z)  the  terms  of  Section  6,  Executive  shall  be  entitled  to  receive  the  following
payments and benefits:

(i)                    The  Company  shall  pay  to  Executive  (A)  Executive’s  earned  but  unpaid  Base  Salary
through  the  date  of  Executive’s  termination  of  employment  and  (B)  any  other  amounts  or  benefits,  if  any,  under  the
Company’s employee benefit plans, programs or arrangements to which Executive may be entitled pursuant to the terms of
such plans, programs or arrangements or applicable law, payable in accordance with the terms of such plans, programs or
arrangements or as otherwise required by applicable law (collectively, the “Accrued Rights”);

(ii)         Any unpaid annual bonus earned by Executive for the year prior to the year in which the
Qualifying Termination occurs, as determined by the Board based upon actual performance achieved, which annual bonus, if
any,  shall  be  paid  to  Executive  at  substantially  the  same  time  annual  bonuses  for  such  year  are  paid  to  similarly  situated
active employees of the Company, but in no event later than December 31 of the year in which the Qualifying Termination
occurs;

(iii)       A cash severance payment equal to [one (1)] times the sum of (A) Executive’s Base Salary
and (B) Executive’s Target Bonus Amount, payable in a lump sum on the Company’s first ordinary payroll date occurring
after the effective date of the Release (as defined below), but in no event later than March 15 of the year following the year
in which Executive’s Qualifying Termination occurs (for purposes of calculating the Executive’s severance payment under
this clause (iii), the Executive’s Base Salary and Target Bonus Amount shall be calculated based on the rate in effect prior to
any decrease that would give the Executive the right to resign for Good Reason);

4

(iv)        If applicable to Executive and Executive timely elects continued medical, dental and/or
vision  coverage  for  Executive  and  Executive’s  covered  spouse  or  dependents  under  the  Company’s  group  health  plans
following  such  Qualifying  Termination  in  accordance  with  COBRA,  then  the  Company  shall  pay  the  COBRA  premiums
necessary to continue Executive’s and Executive’s covered spouse and dependents’ medical, dental and/or vision insurance
coverage  that  is  no  less  favorable  than  the  more  favorable  of  the  insurance  coverage  in  effect  immediately  prior  to  the
Change in Control and the insurance coverage in effect on the date of Executive’s Qualifying Termination (as applicable, the
“COBRA  Premium”)  until  the  earliest  of  (A)  [one  (1)  year]  following  such  Qualifying  Termination,  (B)  the  date  when
Executive becomes eligible for health insurance coverage from a new employer (and Executive agrees to promptly notify the
Company  of  such  eligibility)  and  (C)  the  date  Executive  ceases  to  be  eligible  for  COBRA  continuation  coverage  for  any
reason (the “Benefit Continuation Period”); provided that, if at any time the Company determines that it cannot provide the
foregoing  benefit  without  potentially  violating  applicable  law  (including,  without  limitation,  Section  2716  of  the  Public
Health  Service  Act)  or  incurring  an  excise  tax,  the  Company  will  instead  pay  to  Executive  during  the  remainder  of  the
Benefit  Continuation  Period  a  taxable  monthly  payment  equal  to  140%  of  the  COBRA  Premium  (based  on  the  COBRA
Premium for the first month of the Benefit Continuation Period); and

(v)         All of Executive’s unvested equity or equity-based awards under any equity compensation
plans of Parent that vest solely based upon Executive’s continued employment or service shall immediately become 100%
vested on the later of the date of Executive’s Qualifying Termination and the Change in Control (for the avoidance of doubt,
with  any  such  awards  that  vest  in  whole  or  in  part  based  upon  the  attainment  of  performance  vesting  conditions  being
governed by the terms of the applicable award agreement) and, to the extent necessary, any unvested Parent equity awards
will  remain  outstanding  and  eligible  to  vest  following  Executive’s  Qualifying  Termination  if  a  Change  in  Control  occurs
within [two (2) weeks] following Executive’s Qualifying Termination.

(b)         Other Terminations.   This  Agreement  provides  no  compensation  or  benefits  in  connection  with
terminations which occur at times other than during the Protected Period, except that the Company shall pay to Executive
the Accrued Rights upon any termination of employment.

(c)         Release.  As a condition to Executive’s receipt of any payment or benefits under Section 2(a) other
than the Accrued Rights, Executive shall execute and not revoke a general release of all claims in favor of the Company (the
“Release”) in a form substantially similar to the form attached hereto as Exhibit A, or such equivalent form as is required to
comply with local employment laws applicable to Executive (and any statutorily prescribed revocation period applicable to
such Release shall have expired) within the 60 day period following Executive’s Qualifying Termination.

(d)                  Certain  Reductions.    Notwithstanding  anything  herein  to  the  contrary,  Executive’s  severance
benefits  under  this  Agreement  shall  be  reduced,  but  not  below  zero,  on  a  dollar-for-dollar  (or  other  applicable  currency)
basis by the amount of any other severance payment or benefits, pay in lieu of notice, or other similar benefits payable to the
Executive  by  the  Company  in  connection  with  the  Executive’s  Qualifying  Termination,  including  but  not  limited  to
payments or benefits pursuant to (i) any applicable legal requirement, including any entitlement to statutory severance pay or
(ii)  any  Company  agreement,  arrangement,  policy  or  practice  other  than  this  Agreement  relating  to  the  Employee’s
termination of employment with the Company.

(e)         Parachute Payments.

(i)          Notwithstanding any other provisions of this Agreement, in the event that any payment or
benefit  by  the  Company  or  otherwise  to  or  for  the  benefit  of  Executive,  whether  paid  or  payable  or  distributed  or
distributable pursuant to the terms of this Agreement or otherwise (all such

5

payments and benefits, including the payments and benefits under Section 2(a), being hereinafter referred to as the “Total
Payments”),  would  be  subject  (in  whole  or  in  part)  to  the  excise  tax  imposed  by  Section  4999  of  the  Code  (the  “Excise
Tax”), then the Total Payments shall be reduced (in the order provided in Section 2(e)(ii)) to the minimum extent necessary
to avoid the imposition of the Excise Tax on the Total Payments, but only if the net amount of such Total Payments, as so
reduced (and after subtracting the net amount of federal, state and local income and employment taxes on such reduced Total
Payments and after taking into account the phase out of itemized deductions and personal exemptions attributable to such
reduced Total Payments), is greater than or equal to the net amount of such Total Payments without such reduction (but after
subtracting the net amount of federal, state and local income and employment taxes on such Total Payments and the amount
of the Excise Tax to which Executive would be subject in respect of such unreduced Total Payments and after taking into
account the phase out of itemized deductions and personal exemptions attributable to such unreduced Total Payments).

(ii)         The Total Payments shall be reduced in the following order: (i) first, a reduction of any
portion  of  the  Total  Payments  that  are  exempt  from  Section  409A  in  a  manner  the  Company  reasonably  determines  will
provide Executive with the greatest post-reduction economic benefit and (ii) second, a reduction of any portion of the Total
Payments  that  are  subject  to  Section  409A  on  a  pro-rata  basis  or  such  other  manner  that  complies  with  Section  409A,  as
reasonably determined by the Company.

(iii)              All  determinations  regarding  the  application  of  this  Section  2(e)  shall  be  made  by  an
accounting firm or consulting group with experience in performing calculations regarding the applicability of Section 280G
of the Code and the Excise Tax selected by the Company (the “Independent Advisors”).  For purposes of the determinations,
no portion of the Total Payments shall be taken into account which, in the opinion of the Independent Advisors, (i) does not
constitute  a  “parachute  payment”  within  the  meaning  of  Section  280G(b)(2)  of  the  Code  (including  by  reason  of  Section
280G(b)(4)(A) of the Code) or (ii) constitutes reasonable compensation for services actually rendered, within the meaning of
Section 280G(b)(4)(B) of the Code, in excess of the “base amount” (as defined in Section 280G(b)(3) of the Code) allocable
to such reasonable compensation.  The costs of obtaining such determination and all related fees and expenses (including
related fees and expenses incurred in any later audit) shall be borne by the Company.

(iv)        In the event it is later determined that a greater reduction in the Total Payments should have
been  made  to  implement  the  objective  and  intent  of  this  Section  2(e),  the  excess  amount  shall  be  returned  promptly  by
Executive to the Company.

(f)         Withholding.  All compensation and benefits to Executive hereunder shall be reduced by all federal,

state, local and other withholdings and similar taxes and payments required by applicable law.

(g)         Notice of Termination.  Any termination of the Executive’s employment by the Company or by
Executive  under  this  Agreement  shall  be  communicated  by  a  written  notice  to  the  other  party  hereto  (i)  indicating  the
specific  termination  provision  in  this  Agreement  relied  upon,  (ii)  setting  forth  in  reasonable  detail  the  facts  and
circumstances  claimed  to  provide  a  basis  for  termination  of  the  Executive’s  employment  under  the  provision  so  indicated
and (iii) specifying a date of termination (a “Notice of Termination”).  A Notice of Termination submitted by one party may
provide for a date of termination on the date the other party receives the Notice of Termination or any date thereafter elected
by the first party in its discretion; provided, however, that in the event that Executive delivers a Notice of Termination to the
Company, the Company may, in its sole discretion, change the date of termination to any date that occurs on or following the
date of the Company’s receipt of such Notice of Termination and is prior to the date specified in such Notice of Termination.
 The failure by the Company or Executive to set forth in the Notice

6

of Termination any fact or circumstance which contributes to a showing of Cause or Good Reason shall not waive any right
of  such  party  hereunder  or  preclude  such  party  from  asserting  such  fact  or  circumstance  in  enforcing  such  party’s  rights
hereunder.

3.          Condition to Severance Obligations.  The Company shall be entitled to cease all severance payments and
benefits  to  Executive  in  the  event  of  Executive’s  breach  of  any  of  the  provisions  of  the  Confidentiality  and  Restrictive
Covenant Agreements, which are hereby incorporated by reference into this Agreement.

4.          Agreement to Arbitrate.  Any controversy, claim or dispute arising out of or relating to this Agreement, shall
be settled solely and exclusively by binding arbitration in New York, NY.  Such arbitration shall be conducted in accordance
with  the  then  prevailing  JAMS  Streamlined  Arbitration  Rules  &  Procedures,  with  the  following  exceptions  if  in  conflict:
(a) one arbitrator shall be chosen by JAMS; (b) each party to the arbitration will pay its pro rata share of the expenses and
fees of the arbitrator, unless otherwise required to enforce this Section 4; and (c) arbitration may proceed in the absence of
any party if written notice (pursuant to the JAMS’ rules and regulations) of the proceedings has been given to such party.
 Each party shall bear its own attorneys’ fees and expenses.  The parties agree to abide by all decisions and awards rendered
in  such  proceedings.    Such  decisions  and  awards  rendered  by  the  arbitrator  shall  be  final  and  conclusive.    All  such
controversies, claims or disputes shall be settled in this manner in lieu of any action at law or equity; provided, however, that
nothing in this section shall be construed as precluding the bringing an action in a court of competent jurisdiction to enforce
the  Confidentiality  Agreements  or  any  other  non-competition,  non-solicitation,  non-disparagement,  confidentiality,
assignment of invention or other intellectual property related covenants contained in any other agreement between Executive
and the Company.

5.          Employment Relationship.

(a)                  Except  as  otherwise  provided  in  Section  5(b),  if  applicable,  Executive’s  employment  with  the
Company is at-will and not for any specified period and may be terminated at any time, with or without Cause or advance
notice, by either Executive or the Company, subject to the notice requirements of this Agreement or as otherwise provided in
any  employment  agreement  or  other  written  agreement  between  Executive  and  the  Company.   Any  change  to  the  at-will
employment relationship must be by specific, written agreement signed by Executive and an authorized representative of the
Company.    Nothing  in  this  Agreement  is  intended  to  or  should  be  construed  to  contradict,  modify  or  alter  this  at-will
relationship.

(b)         Notwithstanding Section 5(a), if Executive is employed in the U.K., Executive’s employment with
the  Company  remains  governed  by  the  terms  of  Executive’s  employment  agreement  or  other  written  agreement  between
Executive and the Company.  Nothing in this Agreement is intended to or should be construed to contradict, modify or alter
that employment agreement or other written agreement.

6.          General Provisions.

(a)         Successors and Assigns.  The rights of the Company under this Agreement may, without the consent
of  Executive,  be  assigned  by  the  Company  to  any  person,  firm,  corporation  or  other  business  entity  which  at  any  time,
whether by purchase, merger or otherwise, directly or indirectly, acquires all or substantially all of the assets or business of
the  Company  or  Parent.    The  Company  will  require  any  successor  (whether  direct  or  indirect,  by  purchase,  merger  or
otherwise) to all or substantially all of the business or assets of the Company or Parent to assume this Agreement.  Executive
shall not be entitled to assign any of Executive’s rights or obligations under this Agreement.  This Agreement shall inure to
the

7

benefit of and be enforceable by Executive’s personal or legal representatives, executors, administrators, successors, heirs,
distributees, devisees and legatees.

(b)         Severability.  In the event any provision of this Agreement is found to be unenforceable by a court
of  competent  jurisdiction,  such  provision  shall  be  deemed  modified  to  the  extent  necessary  to  allow  enforceability  of  the
provision as so limited, it being intended that the parties shall receive the benefit contemplated herein to the fullest extent
permitted by law.  If a deemed modification is not satisfactory in the judgment of such court, the unenforceable provision
shall be deemed deleted, and the validity and enforceability of the remaining provisions shall not be affected thereby.

(c)         Interpretation; Waiver.  The headings set forth in this Agreement are for convenience only and shall
not be used in interpreting this Agreement.  Either party’s failure to enforce any provision of this Agreement shall not in any
way be construed as a waiver of any such provision, or prevent that party thereafter from enforcing each and every other
provision of this Agreement.

(d)         Governing Law and Venue.  This Agreement will be governed by and construed in accordance with
the laws of the United States and the State of New York applicable to contracts made and to be performed wholly within
such State, and without regard to the conflicts of laws principles that would result in the application of the laws of another
jurisdiction.   Any  suit  brought  hereon  shall  be  brought  in  the  state  or  federal  courts  sitting  in  New  York,  NY,  the  parties
hereby waiving any claim or defense that such forum is not convenient or proper.  Each party hereby agrees that any such
court shall have in personam jurisdiction over it and consents to service of process in any manner authorized by New York
law.

(e)                  Notices.   Any  notice  required  or  permitted  by  this  Agreement  shall  be  in  writing  and  shall  be
delivered  as  follows  with  notice  deemed  given  as  indicated:    (i)  by  personal  delivery  when  delivered  personally;  (ii)  by
overnight courier upon written verification of receipt; (iii) by telecopy or facsimile transmission upon acknowledgment of
receipt of electronic transmission; or (iv) by certified or registered mail, return receipt requested, upon verification of receipt.
 Notice shall be sent to Executive at the most recent address for Executive set forth in the Company’s personnel files and to
the Company at its principal place of business, or such other address as either party may specify in writing.

(f)         Survival.  Sections 2 (“Severance”), 3 (“Condition to Severance Obligations”), 4 (“Agreement to
Arbitrate”) and 6 (“General Provisions”) of this Agreement shall survive termination of Executive’s employment with the
Company.

(g)         Entire Agreement.  This Agreement and the Confidentiality and Restrictive Covenant Agreements
incorporated  herein  by  reference  as  set  forth  in  Section  3  together  constitute  the  entire  agreement  between  the  parties  in
respect  of  the  subject  matter  contained  herein  and  therein  and  supersede  all  prior  or  simultaneous  representations,
discussions, negotiations, and agreements, whether written or oral.  This Agreement may be amended or modified only with
the  written  consent  of  Executive  and  an  authorized  representative  of  the  Company.    No  oral  waiver,  amendment  or
modification will be effective under any circumstances whatsoever.

(h)         Trade Secrets; Whistleblower Protections. In accordance with 18 U.S.C. § 1833, notwithstanding
anything to the contrary in this Agreement, the Confidentiality and Restrictive Covenant Agreements or any other agreement
between Executive and the Company or any of its Affiliates (together, the “Subject Documents”): (i) Executive shall not be
in breach of any Subject Document, and shall not be held criminally or civilly liable under any federal or state trade secret
law (x) for the disclosure of a trade secret that is made in confidence to a federal, state, or local government official or to an
attorney solely for the purpose of reporting or investigating a suspected violation of law, or (y) for the disclosure of a trade
secret that is made in a complaint or other document filed in a lawsuit or other proceeding, if such filing is

8

made under seal; and (ii) if Executive files a lawsuit for retaliation by the Company for reporting a suspected violation of
law, Executive may disclose the trade secret to Executive’s attorney, and may use the trade secret information in the court
proceeding, if Executive files any document containing the trade secret under seal, and does not disclose the trade secret,
except pursuant to court order. Furthermore, nothing in any Subject Document prevents Executive from reporting possible
violations  of  law  or  regulation  to  any  governmental  agency  or  entity  in  accordance  with  the  provisions  of  and  rules
promulgated  under  Section  21F  of  the  Exchange  Act  or  Section  806  of  the  Sarbanes-Oxley  Act  of  2002,  or  any  other
whistleblower  protection  provisions  of  state  or  federal  law  or  regulation  (including  the  right  to  receive  an  award  for
information provided to any such government agencies).

(i)          Code Section 409A.

(i)          The intent of the parties is that the payments and benefits under this Agreement comply
with  or  be  exempt  from  Section  409A,  and  to  the  maximum  extent  permitted,  this  Agreement  shall  be  interpreted  in
accordance with this intent.

(ii)         Notwithstanding anything in this Agreement to the contrary, any compensation or benefits
payable  under  this  Agreement  upon  Executive’s  termination  of  employment  shall  be  payable  only  upon  Executive’s
“separation  from  service”  with  the  Company  within  the  meaning  of  Section  409A  (a  “Separation  from  Service”).    If  the
period during which Executive may deliver the Release begins in one year and ends in the next, then to the extent required to
comply with Section 409A, payments under Section 2 of this Agreement will in all events commence only in the later year.

(iii)       Notwithstanding anything in this Agreement to the contrary, if Executive is deemed by the
Company at the time of Executive’s Separation from Service to be a “specified employee” for purposes of Section 409A, to
the  extent  delayed  commencement  of  any  portion  of  the  benefits  to  which  Executive  is  entitled  under  this  Agreement  is
required  in  order  to  avoid  a  prohibited  distribution  under  Section  409A,  such  portion  of  Executive’s  benefits  shall  not  be
provided to Executive prior to the earlier of (i) the expiration of the six-month period measured from the date of Executive’s
Separation from Service with the Company or (ii) the date of Executive’s death.  Upon the first business day following the
expiration of the applicable Section 409A period, all payments deferred pursuant to the preceding sentence shall be paid in a
lump  sum  to  Executive  (or  Executive’s  estate  or  beneficiaries),  and  any  remaining  payments  due  to  Executive  under  this
Agreement shall be paid as otherwise provided herein.

(iv)        Executive’s right to receive any installment payments under this Agreement shall be treated
as  a  right  to  receive  a  series  of  separate  payments  and,  accordingly,  each  such  installment  payment  shall  at  all  times  be
considered  a  separate  and  distinct  payment  as  permitted  under  Section  409A.    Except  as  otherwise  permitted  under
Section 409A, no payment hereunder shall be accelerated or deferred unless such acceleration or deferral would not result in
additional tax or interest pursuant to Section 409A.

(v)         To the extent that any reimbursements under this Agreement are subject to Section 409A,
any such reimbursements payable to Executive shall be paid to Executive no later than December 31 of the year following
the  year  in  which  the  expense  was  incurred,  the  amount  of  expenses  reimbursed  in  one  year  shall  not  affect  the  amount
eligible for reimbursement in any subsequent year, other than medical expenses referred to in Section 105(b) of the Code,
and  Executive’s  right  to  reimbursement  under  this  Agreement  will  not  be  subject  to  liquidation  or  exchange  for  another
benefit.

(j)                    Consultation  with  Legal  and  Financial  Advisors.    By  executing  this  Agreement,  Executive
acknowledges  that  this  Agreement  confers  significant  legal  rights,  and  may  also  involve  the  waiver  of  rights  under  other
agreements; that the Company has encouraged Executive to consult with

9

Executive’s  personal  legal  and  financial  advisors;  and  that  Executive  has  had  adequate  time  to  consult  with  Executive’s
advisors before executing this Agreement.

(k)         Counterparts.  This Agreement may be executed in multiple counterparts, each of which shall be
deemed  an  original  but  all  of  which  together  shall  constitute  one  and  the  same  instrument.  A  facsimile,  PDF,  electronic
signature or any other type of copy of an executed version of this Agreement signed by a party is binding upon the signing
party to the same extent as the original of the signed Agreement.

(Signature Page Follows)

10

THE  PARTIES  TO  THIS  AGREEMENT  HAVE  READ  THE  FOREGOING  AGREEMENT  AND  FULLY
UNDERSTAND  EACH  AND  EVERY  PROVISION  CONTAINED  HEREIN.    WHEREFORE,  THE  PARTIES  HAVE
EXECUTED THIS AGREEMENT AS OF THE DATE FIRST SET FORTH ABOVE .

[EMPLOYING SUBSIDIARY]

By:
Name:
Title:

EXECUTIVE

[NAME]

EXHIBIT A

GENERAL RELEASE OF CLAIMS

[The  language  in  this  Release  may  change  based  on  legal  developments  and  evolving  best  practices;  this  form  is

provided as an example of what will be included in the final Release document.]

This General Release of Claims (“Release”)  is  entered  into  between  ________  (“Executive”)  and  [EMPLOYING
SUBSIDIARY] (the “Company”) (collectively referred to herein as the “Parties”). Capitalized terms used but not defined in
this Release shall have the meanings set forth in the Agreement (as defined below).

WHEREAS,  Executive  and  the  Company  are  parties  to  that  certain  Change  in  Control  Agreement  effective  as  of

__________, ____ (the “Agreement”);

WHEREAS, the Parties agree that Executive is entitled to certain severance benefits under the Agreement, subject to

Executive’s execution of this Release; and

WHEREAS, the Company and Executive now wish to fully and finally resolve all matters between them as set forth

herein.

NOW, THEREFORE, in consideration of, and subject to, the severance benefits payable to Executive pursuant to the
Agreement, the adequacy of which is hereby acknowledged by Executive, and which Executive acknowledges that he or she
would not otherwise be entitled to receive, Executive and the Company hereby agree as follows:

1.          General Release of Claims by Executive.

(a)                  Executive,  on  behalf  of  himself  or  herself  and  his  or  her  executors,  heirs,  administrators,
representatives  and  assigns,  hereby  agrees  to  release  and  forever  discharge  the  Company  and  all  predecessors,  successors
and  their  respective  parent  entities,  affiliates,  related,  and/or  subsidiary  entities,  including,  without  limitation,  MeiraGTx
Holdings  plc  (“Parent”),  and  all  of  their  past  and  present  investors,  directors,  shareholders,  officers,  general  or  limited
partners, employees, attorneys, creditors, agents and representatives, and the employee benefit plans in which Executive is or
has  been  a  participant  by  virtue  of  his  or  her  employment  with  or  service  to  the  Company  (collectively,  the  “Company
Releasees”),  from  any  and  all  claims,  debts,  demands,  accounts,  judgments,  rights,  causes  of  action,  equitable  relief,
damages,  costs,  charges,  complaints,  obligations,  promises,  agreements,  controversies,  suits,  expenses,  compensation,
responsibility and liability of every kind and character whatsoever (including attorneys’ fees and costs), whether in law or
equity, known or unknown, asserted or unasserted, suspected or unsuspected, which Executive has or may have had against
such entities based on any events or circumstances arising or occurring on or prior to the date Executive signs this Release,
arising  directly  or  indirectly  out  of,  relating  to,  or  in  any  other  way  involving  in  any  manner  whatsoever  Executive’s
employment  by  or  service  to  the  Company  or  the  termination  thereof,  including  any  and  all  claims  arising  under  federal,
state, or local laws relating to employment, including without limitation claims of wrongful discharge, breach of express or
implied contract, fraud, misrepresentation, defamation, or liability in tort, and claims of any kind that may be brought in any
court  or  administrative  agency  including,  without  limitation,  claims  under  Title  VII  of  the  Civil  Rights  Act  of  1964,  as
amended, 42 U.S.C. Section 2000, et seq.; the Americans with Disabilities Act, as amended, 42 U.S.C. § 12101 et seq.; the
Rehabilitation Act of 1973, as amended, 29 U.S.C. § 701 et seq.; the Civil Rights Act of 1866, and the Civil Rights Act of
1991; 42 U.S.C. Section 1981, et seq.; the Age Discrimination in Employment Act, as amended, 29 U.S.C. Section 621, et
seq. (the “ADEA”); the Equal Pay Act, as amended, 29 U.S.C. Section 206(d); regulations of the

A-1

Office  of  Federal  Contract  Compliance,  41  C.F.R.  Section  60,  et  seq.;  the  Family  and  Medical  Leave  Act,  as  amended,
29  U.S.C.  §  2601  et  seq.;  the  Fair  Labor  Standards  Act  of  1938,  as  amended,  29  U.S.C.  §  201  et  seq.;  the  Employee
Retirement Income Security Act, as amended, 29 U.S.C. § 1001 et seq.; and any similar state or local law.

Notwithstanding the generality of the foregoing, Executive does not release the following:

to the terms of applicable state law;

(i)          Claims for unemployment compensation or any state disability insurance benefits pursuant

compensation insurance policy or fund of the Company;

(ii)                  Claims  for  workers’  compensation  insurance  benefits  under  the  terms  of  any  worker’s

(iii)       Claims pursuant to the terms and conditions of the federal law known as COBRA;

(iv)        Claims for indemnity under contract, the bylaws of the Company or its affiliates or any
applicable insurance policy with respect to Executive’s liability as an employee, director or officer of the Company or any of
its affiliates pursuant to which Executive is covered as of the effective date of Executive’s termination of employment with
the Company;

(v)         Claims for payment under Section 2(a) of the Agreement;

(vi)        Executive’s right to vested equity securities of Parent; and

rights may not be released under such applicable law.

(vii)       Any rights that cannot be released as a matter of applicable law, but only to the extent such

Further, this Release does not prevent Executive from reporting possible violations of federal law or regulation to
any United States governmental agency or entity in accordance with the provisions of and rules promulgated under Section
21F  of  the  Exchange  Act  or  Section  806  of  the  Sarbanes-Oxley  Act  of  2002,  or  any  other  whistleblower  protection
provisions of state or federal law or regulation (including the right to receive an award for information provided to any such
government agencies).

(b)         Executive acknowledges that Executive is entitled to have [twenty-one (21)/forty-five (45)] days’
time  in  which  to  consider  this  Release,  and  that  such  time  period  to  review  this  Release  shall  not  be  extended  upon  any
material  or  immaterial  changes  to  this  Release.  Executive  further  acknowledges  that  the  Company  has  advised  Executive
that  Executive  is  waiving  Executive’s  rights  under  the  ADEA,  and  that  Executive  should  consult  with  an  attorney  of
Executive’s choice before signing this Release, and Executive has had sufficient time to consider the terms of this Release.
 Executive represents and acknowledges that if Executive executes this Release before [twenty-one (21)/forty-five (45)] days
have  elapsed,  Executive  does  so  knowingly,  voluntarily,  and  upon  the  advice  and  with  the  approval  of  Executive’s  legal
counsel  (if  any),  and  that  Executive  voluntarily  waives  any  remaining  consideration  period.  Executive  understands  that
nothing  in  this  Release  prevents  or  precludes  Executive  from  challenging  or  seeking  a  determination  in  good  faith  of  the
validity of this waiver under the ADEA, nor does it impose any condition precedent, penalties, or costs for doing so, unless
specifically authorized by federal law.

(c)         Executive understands that after executing this Release, Executive has the right to revoke it within
seven  (7)  days  after  Executive’s  execution  of  it.    Executive  understands  that  this  Release  will  not  become  effective  and
enforceable unless the seven (7) day revocation period passes and Executive

2

does not revoke the Release in writing.  Executive understands that this Release may not be revoked after the seven (7) day
revocation period has passed.  Executive also understands that any revocation of this Release must be made in writing and
delivered to the Company at its principal place of business within the seven (7) day period.

(d)                  Executive  understands  that  this  Release  shall  become  effective,  irrevocable,  and  binding  upon
Executive on the eighth (8th) day after Executive’s execution of it, so long as Executive has not revoked it within the time
period and in the manner specified in clause (c) above.  Executive further understands that Executive will not be given any
severance benefits under the Agreement unless this Release is effective on or before the date that is 60 days following the
date of Executive’s termination of employment.

2.                    No Assignment.    Executive  represents  and  warrants  to  the  Company  Releasees  that  there  has  been  no
assignment or other transfer of any interest in any claim that Executive may have against the Company Releasees.  Executive
agrees  to  indemnify  and  hold  harmless  the  Company  Releasees  from  any  liability,  claims,  demands,  damages,  costs,
expenses and attorneys’ fees incurred as a result of any such assignment or transfer from Executive.

3.          Severability.  In the event any provision of this Release is found to be unenforceable by an arbitrator or
court of competent jurisdiction, such provision shall be deemed modified to the extent necessary to allow enforceability of
the provision as so limited, it being intended that the parties shall receive the benefit contemplated herein to the fullest extent
permitted by law.  If a deemed modification is not satisfactory in the judgment of such arbitrator or court, the unenforceable
provision  shall  be  deemed  deleted,  and  the  validity  and  enforceability  of  the  remaining  provisions  shall  not  be  affected
thereby.

4.          Interpretation; Waiver.  The headings set forth in this Release are for convenience only and shall not be used
in  interpreting  this  Agreement.  Either  party’s  failure  to  enforce  any  provision  of  this  Release  shall  not  in  any  way  be
construed as a waiver of any such provision, or prevent that party thereafter from enforcing each and every other provision
of this Release.

5.          Governing Law and Venue.  This Release will be governed by and construed in accordance with the laws of
the United States and the State of New York applicable to contracts made and to be performed wholly within such State, and
without regard to the conflicts of laws principles that would result in the application of the laws of another jurisdiction.  Any
suit brought hereon shall be brought in the state or federal courts sitting in New York, NY, the parties hereby waiving any
claim or defense that such forum is not convenient or proper.  Each party hereby agrees that any such court shall have in
personam jurisdiction over it and consents to service of process in any manner authorized by New York law.

6.          Entire Agreement.  This Release and the Agreement constitute the entire agreement of the Parties in respect
of  the  subject  matter  contained  herein  and  therein  and  supersede  all  prior  or  simultaneous  representations,  discussions,
negotiations  and  agreements,  whether  written  or  oral.    This  Release  may  be  amended  or  modified  only  with  the  written
consent of Executive and an authorized representative of the Company.  No oral waiver, amendment or modification will be
effective under any circumstances whatsoever.

7.          Counterparts.  This Release may be executed in multiple counterparts, each of which shall be deemed to be

an original but all of which together shall constitute one and the same instrument.

(Signature Page Follows)

3

IN WITNESS WHEREOF, and intending to be legally bound, the Parties have executed the foregoing Release as of

the dates below.

[EMPLOYING SUBSIDIARY]

Dated:

Dated:

By:
Name:
Title:

EXECUTIVE

[NAME]

Legal Name of Subsidiary
BRI-Alzan, Inc.
MeiraGTx B.V.
MeiraGTx Netherlands B.V.
MeiraGTx Limited
MeiraGTx, LLC
MeiraGTx UK Limited
MeiraGTx UK II Limited
MeiraGTx Ireland DAC
MeiraGTx Neurosciences, Inc.
MeiraGTx Bio Inc.

SUBSIDIARIES OF MEIRAGTX HOLDINGS PLC

     Jurisdiction of Organization

Exhibit 21

Delaware
Netherlands
Netherlands
England and Wales
Delaware
England and Wales
England and Wales
Ireland
Delaware
Delaware

EXHIBIT 23.1

We consent to the incorporation by reference in the following Registration Statements:

Consent of Independent Registered Public Accounting Firm

(1) Registration Statement (Form S-8 No. 333-225535) pertaining to the 2016 Equity Incentive Plan, 2018 Incentive Award Plan and

2018 Employee Share Purchase Plan of MeiraGTx Holdings plc,

(2) Registration Statement (Form S-3 No. 333-232527) of MeiraGTx Holdings plc, and

(3) Registration Statement (Form S-3 No. 333-232677) of MeiraGTx Holdings plc;

of our report dated March 11, 2021, with respect to the consolidated financial statements of MeiraGTx Holdings plc included in this
Annual Report (Form 10-K) of MeiraGTx Holdings plc for the year ended December 31, 2020.

/s/ Ernst & Young LLP

Stamford, Connecticut
March 11, 2021

CERTIFICATION

Exhibit 31.1

I, Alexandria Forbes, certify that:

1.

I have reviewed this Annual Report on Form 10-K for the fiscal year ended December 31, 2020 of MeiraGTx Holdings plc;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary
to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to
the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all

material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in
this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as

defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act
Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our

supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known
to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed
under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of
financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions
about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on
such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the

registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially
affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial
reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the
equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which

are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information;
and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s

internal control over financial reporting.

Date: March 11, 2021

By:

/s/ Alexandria Forbes
Alexandria Forbes
President and Chief Executive Officer
(Principal Executive Officer)

 
      
      
 
 
 
 
 
 
Exhibit 31.2

I, Richard Giroux, certify that:

CERTIFICATION

1.     I have reviewed this Annual Report on Form 10-K for the fiscal year ended December 31, 2020 of MeiraGTx Holdings plc;

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary
to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to
the period covered by this report;

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all

material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in
this report;

4.    The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as

defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act
Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)  Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our

supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known
to us by others within those entities, particularly during the period in which this report is being prepared;

(b)  Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed
under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of
financial statements for external purposes in accordance with generally accepted accounting principles;

(c)  Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions
about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on
such evaluation; and

(d)  Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the

registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially
affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.    The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial
reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the
equivalent functions):

(a)  All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which

are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information;
and

(b)  Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s

internal control over financial reporting.

Date: March 11, 2021

By:

/s/ Richard Giroux
Richard Giroux
Chief Financial Officer and Chief Operating Officer
(Principal Financial Officer)

 
      
      
 
 
 
 
 
 
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32.1

In connection with the Annual Report on Form 10-K of MeiraGTx Holdings plc (the “Company”) for the year ended December 31,
2020, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. § 1350, as
adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1)  The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)  The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations

of the Company.

Date: March 11, 2021

By:

/s/ Alexandria Forbes
Alexandria Forbes
President and Chief Executive Officer
(Principal Executive Officer)

 
      
      
 
 
 
 
 
 
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32.2

In connection with the Annual Report on Form 10-K of MeiraGTx Holdings plc (the “Company”) for the year ended December 31,
2020, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. § 1350, as
adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1)  The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)  The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations

of the Company.

Date: March 11, 2021

By:

/s/ Richard Giroux
Richard Giroux
Chief Financial Officer and Chief Operating Officer
(Principal Financial Officer)