MeiraGTx Reports Fourth Quarter and Full Year 2021 Financial and Operational Results - Phase 3 Lumeos Clinical Trial of botaretigene sparoparvovec (AAV-RPGR) for the Treatment of X-linked Retinitis Pigmentosa (XLRP) Enro

MeiraGTx Reports Fourth Quarter and Full Year 2021 Financial and Operational Results

- Phase 3 Lumeos Clinical Trial of botaretigene sparoparvovec (AAV-RPGR) for the Treatment of X-linked Retinitis Pigmentosa (XLRP) Enrolling and Dosing Patients

- Received $30 Million Cash Milestone Payment from Janssen Pharmaceuticals, Inc.

- Positive Preliminary Clinical Data from AQUAx AAV-hAQP1 Phase 1 Trial for Treatment of Grade 2/3 Radiation-Induced Xerostomia Announced

- First In Vivo Data from Riboswitch Gene Regulation Platform at R&D Day Presented

LONDON and NEW YORK, March 10, 2022 (GLOBE NEWSWIRE) -- MeiraGTx Holdings plc (Nasdaq: MGTX), a vertically integrated, clinical stage gene therapy company, today announced financial and operational results for the fourth quarter and full-year ended December 31, 2021, and provided a corporate update.

"MeiraGTx had an exceptional year in 2021, marked by advancements in all aspects of our pipeline and technology platforms," said Alexandria Forbes, Ph.D., president and chief executive officer of MeiraGTx. "We initiated our first pivotal study with our partner Janssen for the treatment of XLRP using drug product manufactured in-house at our cGMP facility using our proprietary manufacturing process, we announced positive preliminary clinical data from our wholly-owned grade 2/3 xerostomia program and we presented the first in vivo data from our transformative gene regulation platform."

"This progress is enabled by the broad end-to-end capabilities we have focused on building at the Company since inception," continued Dr. Forbes. "We have established leading capabilities in vector engineering and optimization, viral vector production process development, manufacturing and quality, all while developing our synthetic biology platform which for the first time allows precise and specific control of genetic medicines using novel orally dosed small molecules."

Recent Development Highlights and Anticipated 2022 Milestones

Botaretigene Sparoparvovec (AAV-RPGR) for the Treatment of XLRP:

AAV-hAQP1 for the Treatment of Grade 2/3 Radiation-Induced Xerostomia:

Riboswitch Gene Regulation Platform:

AAV-GAD for the Treatment of Parkinson's Disease:

AAV-CNGB3 and AAV-CNGA3 for the Treatment of Achromatopsia (ACHM):

Manufacturing and Process Development:

For more information related to our clinical trials, please visit www.clinicaltrials.gov

As of December 31, 2021, MeiraGTx had cash and cash equivalents of approximately $137.7 million, as well as approximately $22.4 million due in receivables in the next 30 days from development partner Janssen as part of a broader collaboration to develop and commercialize gene therapies for the treatment of inherited retinal diseases.

The Company believes it will have sufficient capital to fund operating expenses and capital expenditure requirements through the second quarter of 2023.

Cash and cash equivalents were $137.7 million as of December 31, 2021, compared to $209.5 million as of December 31, 2020.

License revenue was $37.7 million for the year ended December 31, 2021, compared to $15.6 million for the year ended December 31, 2020. This increase represents the increased amortization of the $100.0 million upfront payment as well as amortization of the $30.0 million milestone payment received in connection with the Janssen collaboration agreement.

General and administrative expenses were $43.8 million for the year ended December 31, 2021, compared to $44.2 million for the year ended December 31, 2020. The decrease of $0.4 million was primarily due to a decrease in share-based compensation and payroll and payroll related costs, which was partially offset by increases in insurance, facility costs, professional fees and other general and administrative expenses.

Research and development expenses for the years ended December 31, 2021 and 2020 were as follows (in millions):

Gross research and development expenses for the year ended December 31, 2021 increased $44.9 million as compared to the prior year primarily due to an increase in research and clinical trial costs related to our ophthalmology, neurology, gene regulation and salivary gland programs, manufacturing of our clinical trial materials, payroll and payroll related costs, depreciation, rent and facility costs, share-based compensation and other research costs, which was partially offset by a decrease in acquired research and development costs.

Reimbursements under the Janssen collaboration agreement for the year ended December 31, 2021 increased $11.6 million as compared to the prior year primarily due to an increase in activity in the programs licensed under the Janssen collaboration agreement.

Tax incentive reimbursement for the year ended December 31, 2021 increased $0.1 million as compared to the prior year primarily due to the increase in allowable research and development costs.

Foreign currency loss was $6.3 million for the year ended December 31, 2021 compared to a gain of $3.4 million for the year ended December 31, 2020. The change of $9.7 million was primarily due to a weakening of the pound sterling and euro against the U.S. dollar and an increase in the amounts due from foreign subsidiaries in 2021.

Interest income was $0.2 million for the year ended December 31, 2021 compared to $1.3 million for the year ended December 31, 2020. The decrease was due to a lower average cash balance and lower interest rates during 2021.

Net loss attributable to ordinary shareholders for the year ended December 31, 2021 was $79.6 million, or $1.80 basic and diluted net loss per ordinary share, compared to a net loss attributable to ordinary shareholders of $58.0 million, or $1.54 basic and diluted net loss per ordinary share for the year ended December 31, 2020.

MeiraGTx (Nasdaq: MGTX) is a vertically integrated, clinical-stage gene therapy company with six programs in clinical development and a broad pipeline of preclinical and research programs. MeiraGTx has core capabilities in viral vector design and optimization and gene therapy manufacturing, and a transformative gene regulation platform technology which allows tight, dose responsive control of gene expression by oral small molecules with dynamic range that may exceed 5000-fold. Led by an experienced management team, MeiraGTx has taken a portfolio approach by licensing, acquiring, and developing technologies that give depth across both product candidates and indications. MeiraGTx's initial focus is on three distinct areas of unmet medical need: ocular, including inherited retinal diseases and large degenerative ocular diseases, neurodegenerative diseases and severe forms of xerostomia. Though initially focusing on the eye, central nervous system, and salivary gland, MeiraGTx plans to expand its focus to develop additional gene therapy treatments for patients suffering from a range of serious diseases.

For more information, please visit www.meiragtx.com

Forward Looking Statement

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements contained in this press release that do not relate to matters of historical fact should be considered forward-looking statements, including, without limitation, statements regarding our product candidate development and anticipated 2022 milestones regarding our pre-clinical and clinical data and reporting of such data and the timing of results of data, including in light of the COVID-19 pandemic, as well as statements that include the words "expect," "intend," "plan," "believe," "project," "forecast," "estimate," "may," "should," "anticipate" and similar statements of a future or forward-looking nature. These forward-looking statements are based on management's current expectations. These statements are neither promises nor guarantees, but involve known and unknown risks, uncertainties and other important factors that may cause actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements, including, but not limited to, our

incurrence of significant losses; any inability to achieve or maintain profitability, raise additional capital, identify additional and develop existing product candidates, successfully execute strategic priorities, bring product candidates to market, expansion of our manufacturing facilities and processes, successfully enroll patients in and complete clinical trials, accurately predict growth assumptions, recognize benefits of any orphan drug designations, retain key personnel or attract qualified employees, or incur expected levels of operating expenses; the impact of the COVID-19 pandemic on the status, enrollment, timing and results of our clinical trials and on our business, results of operations and financial condition; failure of early data to predict eventual outcomes; failure to obtain FDA or other regulatory approval for product candidates within expected time frames or at all; the novel nature and impact of negative public opinion of gene therapy; failure to comply with ongoing regulatory obligations; contamination or shortage of raw materials or other manufacturing issues; changes in healthcare laws; risks associated with our international operations; significant competition in the pharmaceutical and biotechnology industries; dependence on third parties; risks related to intellectual property; changes in tax policy or treatment; our ability to utilize our loss and tax credit carryforwards; litigation risks; and the other important factors discussed under the caption "Risk Factors" in our Annual Report on Form 10-K for the year ended December 31, 2021, as such factors may be updated from time to time in our other filings with the SEC, which are accessible on the SEC's website at www.sec.gov. These and other important factors could cause actual results to differ materially from those indicated by the forward-looking statements made in this press release. Any such forward-looking statements represent management's estimates as of the date of this press release. While we may elect to update such forward-looking statements at some point in the future, unless required by law, we disclaim any obligation to do so, even if subsequent events cause our views to change. 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. These forward-looking statements should not be relied upon as representing our views as of any date subsequent to the date of this press release.

LifeSci Communications

MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES

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MEIRAGTX HOLDINGS PLC AND SUBSIDIARIES

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