• Company Expects to Report Top-Line Results from Phase 3 TRANQUILITY and TRANQUILITY-2 Clinical Trials of Reproxalap in Dry Eye Disease in the Fourth Quarter of 2021
• Phase 2 Clinical Trial of ADX-2191 in Retinitis Pigmentosa On Track to Initiate in the Fourth Quarter of 2021
• Phase 2 Clinical Trial Results of ADX-629 in Multiple Systemic Indications Expected in the Fourth Quarter of 2021 or the First Quarter of 2022
• Cash and Cash Equivalents of $241.4 Million as of September 30, 2021; Projected Cash Runway Through 2023, Including Potential New Drug Applications; Initial Commercialization of Reproxalap, if Approved; and Continued Development of Compounds for Retinal and Systemic Diseases
• Management to Host Conference Call at 8:00 a.m. ET Today

Aldeyra Therapeutics, Inc. (Nasdaq: ALDX) (Aldeyra), a biotechnology company developing novel immune-modulating therapies to treat ocular and systemic diseases, today reported recent corporate highlights and financial results for the quarter ended September 30, 2021.

“We continue to make important progress in developing safe and effective treatments for ocular and systemic diseases to improve the lives of patients who have significant unmet medical needs,” stated Todd C. Brady, M.D., Ph.D., President and Chief Executive Officer of Aldeyra. “Among key clinical milestones, we expect to release top-line results from the Phase 3 TRANQUILITY and TRANQUILITY-2 dry eye disease clinical trials in the fourth quarter of this year and are on track to report top-line results from Phase 2 clinical trials of ADX-629 in psoriasis, atopic asthma, and COVID-19 by the end of the year or early 2022. We also look forward to the planned initiation of our Phase 2 clinical trial of ADX-2191 in retinitis pigmentosa this quarter.”

Recent Corporate Highlights and Program Updates

• Top-Line Results from the Phase 3 TRANQUILITY and TRANQUILITY-2 Trials in Dry Eye Disease Expected in the Fourth Quarter of 2021. Ocular redness is the primary endpoint of the TRANQUILITY trials, which include tear RASP levels, Schirmer's test, and dry eye disease symptoms as secondary endpoints. In addition, enrollment has completed in a multi-center, double-masked, randomized, vehicle-controlled, parallel-group Phase 2 clinical trial of reproxalap in dry eye disease. The Phase 2 trial was designed to optimize the measurement of tear RASP levels.
• Phase 2 Clinical Trial of ADX-2191 in Retinitis Pigmentosa Scheduled to Initiate in the Fourth Quarter of 2021. The primary endpoint of the trial is the safety and tolerability of ADX-2191 in patients with retinitis pigmentosa. Secondary endpoints are visual acuity, central retinal sensitivity, dark-adapted retinal sensitivity, and retinal morphometry.
• Phase 2 Clinical Trial Results from ADX-629, an Orally Administered RASP Inhibitor, Expected in the Fourth Quarter of 2021 or First Quarter of 2022. ADX-629 is in proof-of-concept Phase 2 clinical trials for the treatment of psoriasis, atopic asthma, and COVID-19. ADX-629 represents a first-in-class systems-based therapeutic approach for the potential treatment of many immune-mediated diseases that today are treated with single-target drugs that can lead to toxicity.
• Post-Acute Ocular Tolerability Comparison of Topical Reproxalap 0.25% and Lifitegrast 5% in Patients with Dry Eye Disease Paper Published in Peer-Reviewed Journal. Clinical Ophthalmology published the results of a clinical trial comparing the subjective eye drop experience of patients with dry eye disease over one hour after a single dose of two formulations of reproxalap versus lifitegrast.

Third-Quarter 2021 Financial Results

Cash and cash equivalents as of September 30, 2021 were $241.4 million. Based on Aldeyra’s current operating plan, the company believes that existing cash and cash equivalents will be sufficient to fund currently projected operating expenses through the end of 2023, including potential New Drug Application submissions; initial commercialization of reproxalap, if approved; and continued development of the company’s product candidates in ocular and systemic immune-mediated diseases.

For the quarter ended September 30, 2021, Aldeyra reported a net loss of $15.8 million, compared with a net loss of $8.9 million for the quarter ended September 30, 2020. Net loss per share was $0.27 for the quarter ended September 30, 2021, compared with $0.23 for the same period in 2020. 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 were $12.9 million for the quarter ended September 30, 2021, compared with $6.1 million for the same period in 2020. The increase of $6.8 million is primarily related to increases in our clinical research and development expenditures and consulting costs, partially offset by decreases in personnel related costs, including stock-based compensation, and manufacturing activities.

General and administrative expenses were $2.5 million for the quarter ended September 30, 2021, compared with $2.3 million for the quarter ended September 30, 2020. The increase of $0.2 million is primarily due to an increase in miscellaneous administrative costs.

For the quarter ended September 30, 2021, total operating expenses were $15.4 million, compared with total operating expenses of $8.4 million for the same period in 2020.

Conference Call & Webcast Information

Aldeyra will host a conference call at 8:00 a.m. ET today to discuss third-quarter 2021 financial results and recent corporate highlights. The dial-in numbers are (866) 211-4098 for domestic callers and (647) 689-6613 for international callers. The Conference ID number is 8891298. Due to expected high demand, please dial in at least 15 minutes prior to the start time.

A live webcast of the conference call will also be available on the Investor Relations page of the company’s website at https://ir.aldeyra.com. After the live webcast, the event will remain archived on the Aldeyra Therapeutics website for 90 days.

About Aldeyra Therapeutics, Inc.

Aldeyra Therapeutics is a biotechnology company developing novel immune-modulating therapies to treat ocular and systemic diseases. Two of the company’s lead product candidates, reproxalap and ADX-629, target RASP, which are pre-cytokine, systems-based mediators of inflammation. Reproxalap is being evaluated in Phase 3 clinical trials in patients with dry eye disease and allergic conjunctivitis. The company’s clinical pipeline also includes ADX-2191 (methotrexate for intravitreal injection), a drug candidate in Phase 3 testing for the prevention of proliferative vitreoretinopathy. 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 smaller clinical trials or portions of clinical trials may not accurately predict results of larger scale 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) 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 related public health measures, 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, 2020 and Quarterly Report on Form 10-Q for the quarter ended June 30, 2021, which are 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 September 30, 2021, expected to be filed with the SEC in the fourth quarter of 2021.

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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