• Results from Phase 3 TRANQUILITY-2 Trial of Reproxalap in Dry Eye Disease Expected in Second Quarter of 2022
• Results from Part 1 of Phase 3 GUARD Trial of ADX-2191 in Proliferative Vitreoretinopathy and Phase 2 Clinical Trial of ADX-2191 in Retinitis Pigmentosa Expected in the Second Half of 2022
• Results from Phase 2 Clinical Trial of Oral RASP Inhibitor ADX-629 in Ethanol Toxicity Expected in the Second Half of 2022
• Cash, Cash Equivalents, and Marketable Securities of $216.9 Million as of March 31, 2022
• Management to Host Conference Call at 8:00 a.m. ET Today

Aldeyra Therapeutics, Inc. (Nasdaq: ALDX) (Aldeyra), a biotechnology company developing innovative therapies for the treatment of immune-mediated diseases, today reported recent corporate highlights and financial results for the quarter ended March 31, 2022.

“Consistent with our planned completion this quarter of clinical development for reproxalap in dry eye disease and the recently announced demonstration of clinical activity of ADX-629 in three inflammatory diseases, we are delivering on our strategy to expand our RASP platform from the front of the eye to systemic disease, including clinical trials in ethanol toxicity, chronic cough, minimal change disease, and Sjögren-Larsson Syndrome,” stated Todd C. Brady, M.D., Ph.D., President and CEO of Aldeyra. “Additionally, we continue to advance our intravitreal drug platform for the treatment of rare retinal diseases, highlighted by Phase 3 clinical trial results in proliferative vitreoretinopathy and Phase 2 clinical trial results in retinitis pigmentosa expected in the second half of this year.”

Recent Corporate Highlights

• Completed Enrollment in the Phase 3 TRANQUILITY-2 Trial in Dry Eye Disease. Aldeyra completed enrollment in the Phase 3 TRANQUILITY-2 Trial of 0.25% reproxalap ophthalmic solution in patients with dry eye disease. The primary endpoints of the TRANQUILITY-2 Trial are Schirmer test on the first day of dosing and ocular redness on the second day of dosing during exposure to a dry eye chamber. In a Phase 2 clinical trial and in the Phase 3 TRANQUILITY Trial announced last year, reproxalap demonstrated statistically significant superiority over vehicle in ocular redness and Schirmer test, respectively.
• Reported Positive Top-Line Data and Announced New Indications for ADX-629. At its Research & Development Day in March, Aldeyra reported positive top-line data from Phase 2 proof-of-concept trials of ADX-629, a first-in-class orally administered RASP modulator, suggesting broad-based activity across a number of biomarker and clinical endpoints. Accordingly, Aldeyra announced the advancement of ADX-629 to Phase 2 clinical trials in four new indications: ethanol toxicity, chronic cough, minimal change disease, and Sjögren-Larsson Syndrome.
• Initiated Phase 2 Clinical Trials of ADX-629 in Ethanol Toxicity and Chronic Cough. Patient enrollment has begun in the Phase 2 clinical trials of ADX-629 in ethanol toxicity and chronic cough. Up to 10% of adults in the U.S. abuse ethanol, which when done chronically can lead to the development of liver disease. Chronic cough, defined as a cough that lasts eight weeks or longer in adults, affects an estimated 13 million adults in the U.S., and up to approximately 10% of people worldwide.
• Dry Eye Disease Clinical Data Presented at 2022 ASCRS Annual Meeting. Edward J. Holland, M.D., Professor of Ophthalmology at the University of Cincinnati, presented results from the run-in cohort of the Phase 3 TRANQUILITY Trial of reproxalap in dry eye disease at the 2022 American Society of Cataract and Refractive Surgery (ASCRS) Annual Meeting. The TRANQUILITY run-in cohort demonstrated statistical superiority of reproxalap over vehicle in ocular redness during exposure to a dry eye chamber and in symptom scores after a single day of dosing.

Upcoming Planned Clinical and Regulatory Milestones

• Dry Eye Disease: Results from the Phase 3 TRANQUILITY-2 Trial of reproxalap in dry eye disease are expected in the second quarter of 2022, followed by a planned New Drug Application (NDA) submission to the U.S. Food and Drug Administration, pending the outcome of TRANQUILITY-2 and enrollment in the 12-month safety trial of reproxalap in dry eye disease patients. Aldeyra is continuing to review data from the completed TRANQUILITY Trial to finalize analytical plans for the TRANQUILITY-2 results.
• Allergic Conjunctivitis: Results from the Phase 3 INVIGORATE-2 allergen chamber trial of reproxalap in allergic conjunctivitis are expected in 2023. INVIGORATE-2 is a randomized, double-masked, crossover trial substantially similar in design to INVIGORATE, which demonstrated statistically significant superiority of reproxalap over vehicle for the primary endpoint of ocular itching and the key secondary endpoint of ocular redness.
• Retinal Disease: Results from Part 1 of the Phase 3 GUARD Trial of ADX-2191 in proliferative vitreoretinopathy, and from the Phase 2 clinical trial of ADX-2191 in retinitis pigmentosa, are expected in the second half of 2022.
• Systemic Disease: Results from the Phase 2 clinical trial of ADX-629 in ethanol toxicity are expected in the second half of 2022, and results from the Phase 2 clinical trials of ADX-629 in chronic cough, minimal change disease, and Sjögren-Larsson Syndrome are expected in 2023.

First-Quarter 2022 Financial Results

Cash, cash equivalents, and marketable securities as of March 31, 2022 were $216.9 million. Based on its current operating plan, Aldeyra believes that existing cash, cash equivalents, and marketable securities will be sufficient to fund currently projected operating expenses through the end of 2023, including potential NDA submissions; initial commercialization of reproxalap, if approved; and continued development of Aldeyra’s product candidates in ocular and systemic immune-mediated diseases.

Net loss for the three months ended March 31, 2022 was $16.8 million, or $0.29 per share, compared with a net loss of $11.3 million, or $0.25 per share, for the comparable period of 2021. Losses have resulted from the costs of clinical trials and research and development programs, as well as from general and administrative expenses.

Research and development expenses for the three months ended March 31, 2022 were $12.2 million, compared with $7.7 million for the same period in 2021. The increase of $4.5 million is primarily related to increases in clinical research and development expenditures.

General and administrative expenses for the three months ended March 31, 2022 were $4.2 million, compared with $3.1 million for the same period in 2021. The increase of $1.1 million is primarily due to increases in consulting expenditures.

Total operating expenses for the three months ended March 31, 2022 were $16.5 million, compared with total operating expenses of $10.8 million for the same period in 2021.

Conference Call & Webcast Information

Aldeyra will host a conference call at 8:00 a.m. ET today to discuss recent corporate highlights and financial results for the quarter ended March 31, 2022. The dial-in numbers are (844) 200-6205 for domestic callers and (929) 526-1599 for international callers. The access code is 742862. Please dial in at least 10 minutes prior to the start time.

A live webcast of the conference call can be accessed via the Investors & Media page of Aldeyra’s website at https://ir.aldeyra.com. After the live webcast, the event will remain archived on the website for 90 days.

About Aldeyra

Aldeyra develops innovative therapies designed to treat immune-mediated diseases. Our approach is to discover pharmaceuticals that modulate immunological systems, instead of directly inhibiting or activating single protein targets, with the goal of optimizing multiple pathways at once while minimizing toxicity. Two of our lead product candidates, reproxalap and ADX-629, target pre-cytokine, systems-based mediators of inflammation known as RASP (reactive aldehyde species). Reproxalap is in Phase 3 clinical trials in patients with dry eye disease and allergic conjunctivitis. ADX-629, an orally administered RASP modulator, is in Phase 2 clinical testing for the treatment of systemic immune-mediated diseases. Our pipeline also includes ADX-2191 (intravitreal methotrexate 0.8%), in development for the prevention of proliferative vitreoretinopathy and the treatment of retinitis pigmentosa and primary vitreoretinal lymphoma. For more information, visit https://www.aldeyra.com/ and follow us on LinkedIn, Facebook, and Twitter.

Safe Harbor Statement

This release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including, but not limited to, statements regarding submission of potential New Drug Applications; the anticipated timing of results from Aldeyra’s clinical trials; and Aldeyra’s projected cash runway. Aldeyra intends such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in Section 21E of the Securities Exchange Act of 1934 and the Private Securities Litigation Reform Act of 1995. In some cases, you can identify forward-looking statements by terms such as, but not limited to, "may," "might," "will," "objective," "intend," "should," "could," "can," "would," "expect," "believe," "anticipate," "project," "on track," "scheduled," "target," "design," "estimate," "predict," "potential," "aim," "plan" or the negative of these terms, and similar expressions intended to identify forward-looking statements. Such forward-looking statements are based upon current expectations that involve risks, changes in circumstances, assumptions, and uncertainties. Aldeyra is at an early stage of development and may not ever have any products that generate significant revenue. All of Aldeyra's development timelines may be subject to adjustment depending on recruitment rate, regulatory review, preclinical and clinical results, and other factors that could delay the initiation or completion of clinical trials. Important factors that could cause actual results to differ materially from those reflected in Aldeyra's forward-looking statements include, among others, the timing of enrollment, commencement and completion of Aldeyra's clinical trials, the timing and success of preclinical studies and clinical trials conducted by Aldeyra and its development partners; updated or refined data based on Aldeyra's continuing review and quality control analysis of clinical data, Aldeyra's ability to design clinical trials with protocols and endpoints acceptable to applicable regulatory authorities; delay in or failure to obtain regulatory approval of Aldeyra's product candidates; the ability to maintain regulatory approval of Aldeyra's product candidates, and the labeling for any approved products; the risk that prior results, such as signals of safety, activity or durability of effect, observed from preclinical or clinical trials, will not be replicated or will not continue in ongoing or future studies or clinical trials involving Aldeyra's product candidates in clinical trials focused on the same or on different indications; the risk that the results from earlier clinical trials, portions of clinical trials, or pooled clinical data may not accurately predict results of subsequent trials or the remainder of a clinical trial; the scope, progress, expansion, and costs of developing and commercializing Aldeyra's product candidates; uncertainty as to Aldeyra’s ability to commercialize (alone or with others) and obtain reimbursement for Aldeyra's product candidates following regulatory approval, if any; the size and growth of the potential markets and pricing for Aldeyra's product candidates and the ability to serve those markets; Aldeyra's expectations regarding Aldeyra's expenses and revenue, the sufficiency or use of Aldeyra's cash resources and needs for additional financing; political, economic, legal, social and health risks, including the COVID-19 pandemic and subsequent public health measures, and war or other military actions, that may affect Aldeyra’s business or the global economy; the rate and degree of market acceptance of any of Aldeyra's product candidates; Aldeyra's expectations regarding competition; Aldeyra's anticipated growth strategies; Aldeyra's ability to attract or retain key personnel; Aldeyra’s limited sales and marketing infrastructure; Aldeyra's ability to establish and maintain development partnerships; Aldeyra’s ability to successfully integrate acquisitions into its business; Aldeyra's expectations regarding federal, state and foreign regulatory requirements; regulatory developments in the United States and foreign countries; Aldeyra's ability to obtain and maintain intellectual property protection for its product candidates; the anticipated trends and challenges in Aldeyra's business and the market in which it operates; and other factors that are described in the "Risk Factors" and "Management's Discussion and Analysis of Financial Condition and Results of Operations" sections of Aldeyra's Annual Report on Form 10-K for the year ended December 31, 2021, which is on file with the Securities and Exchange Commission (SEC) and available on the SEC's website at https://www.sec.gov/. Additional factors may be described in those sections of Aldeyra's Quarterly Report on Form 10-Q for the quarter ended March 31, 2022, expected to be filed with the SEC in the second quarter of 2022.

In addition to the risks described above and in Aldeyra's other filings with the SEC, other unknown or unpredictable factors also could affect Aldeyra's results. No forward-looking statements can be guaranteed and actual results may differ materially from such statements. The information in this release is provided only as of the date of this release, and Aldeyra undertakes no obligation to update any forward-looking statements contained in this release on account of new information, future events, or otherwise, except as required by law.

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