VYNE Therapeutics Reports Third Quarter 2024 Financial Results and Provides Business Update VYN201 Phase 2b vitiligo trial exceeds enrollment target Expected to be fully enrolled in December 2024 with top-line results on

VYNE Therapeutics Reports Third Quarter 2024 Financial Results and Provides Business Update

VYN201 Phase 2b vitiligo trial exceeds enrollment target Expected to be fully enrolled in December 2024 with top-line results on track for mid-2025

Reported positive first-in-human Phase 1a SAD data for VYN202, with MAD data expected in Q4 2024

BRIDGEWATER, N.J., November 7, 2024 -- VYNE Therapeutics Inc. (Nasdaq VYNE) ("VYNE" or the "Company"), a clinical-stage biopharmaceutical company focused on developing differentiated therapies to treat chronic inflammatory and immune-mediated conditions with high unmet need, today announced financial results as of and for the three and nine months ended September 30, 2024 and provided a business update.

"We continue to make excellent progress in advancing our two InhiBET clinical programs VYN201 and VYN202, and believe each product candidate has the potential to be a differentiated, class-leading therapy for immune-mediated diseases," said David Domzalski, President and Chief Executive Officer of VYNE. "We recently reported positive SAD data from our Phase 1a SAD MAD trial of oral, BD2-selective BET inhibitor, VYN202, and we anticipate reporting data from the MAD portion of the trial later this quarter. We are encouraged by the strong enrollment in our ongoing Phase 2b trial for VYN201 which we believe underscores the significant unmet need in the treatment of vitiligo. We expect to complete enrollment next month and report topline data mid- next year."

Recent Pipeline Updates

VYN201, a locally-administered small molecule pan-BD BET inhibitor

Phase 2b trial of VYN201 in nonsegmental vitiligo exceeds initial enrollment target and expected to complete enrollment next month. The Phase 2b trial is expected to be fully enrolled in December 2024, with approximately 40 to 50 subjects per arm. The trial was initiated in June 2024 and VYNE expects to report top-line results from the 24-week double-blind portion of the trial in mid-2025.

The Phase 2b trial (NCT06493578) is a randomized, double-blind, vehicle-controlled trial evaluating the efficacy, safety and pharmacokinetics of once-daily VYN201 gel in three dose cohorts (1%, 2% and 3% concentrations) compared to vehicle for 24 weeks. Subjects are being randomized equally (1 1 1 1 ratio) across the active drug cohorts or vehicle. Following the 24-week treatment period, subjects who have been randomized in the three dose cohorts will have the option to continue treatment with their respective dose concentrations for an additional 28-week extension. Subjects who have been randomized in the vehicle group during the initial 24-week treatment period will be equally re-randomized into one of the three active dose cohorts for an additional 28 weeks.

VYN202, an oral small molecule BD2-selective inhibitor

VYNE expects to report top-line results from the multiple ascending dose ("MAD") portion of the Phase 1a trial in the fourth quarter of 2024. Data from the single ascending dose ("SAD") portion of the trial, announced in September 2024, showed that VYN202 was generally well tolerated with no drug related adverse events. Assessment of key pharmacokinetic and pharmacodynamic parameters demonstrated dose dependent drug concentrations of VYN202 in the blood and showed pharmacodynamic impact of VYN202 on key target-engagement and inflammatory biomarkers in whole blood assays, including an inhibitory effect on select inflammatory biomarkers relevant to psoriasis and rheumatoid arthritis.

Pending successful completion of the Phase 1a trial, VYNE plans to initiate Phase 1b trials in adult subjects with moderate-to-severe plaque psoriasis and moderate-to-severely active rheumatoid arthritis, with top-line results anticipated in the second half of 2025.

Financial Results as of and for the Third Quarter Ended September 30, 2024

Cash position. As of September 30, 2024, VYNE had cash, cash equivalents, restricted cash and marketable securities of $70.2 million. VYNE believes its cash, cash equivalents, restricted cash and marketable securities as of September 30, 2024 will be sufficient to fund its operations through the end of 2025.

Share count. As of September 30, 2024, VYNE had 14,751,433 shares issued and outstanding, and outstanding pre-funded warrants to purchase 27,842,740 shares of common stock at an exercise price of $0.0001 per share.

Revenues. Revenues totaled $0.1 million for both the quarters ended September 30, 2024 and 2023, respectively, consisting of royalty revenue from the Company's royalty agreement with LEO Pharma, to whom VYNE previously licensed the rights to Finacea foam.

Research and development expenses. VYNE's research and development expenses for the quarter ended September 30, 2024 were $10.2 million, representing an increase of $6.9 million, or 208.9%, compared to $3.3 million for the quarter ended September 30, 2023. The increase was primarily driven by increased expenses associated with VYNE's ongoing Phase 2b trial of VYN201 in subjects with nonsegmental vitiligo and its ongoing Phase 1a SAD MAD trial of VYN202 of $5.0 million and $1.7 million, respectively. Both trials were initiated in June 2024. In addition, employee-related expenses increased by $0.3 million following the hiring of additional research and development personnel.

General and administrative expenses. VYNE's general and administrative expenses for both the quarters ended September 30, 2024 and 2023 were approximately $3.0 million, representing an immaterial change year-over-year.

Net loss. Net loss and net loss per share for the quarter ended September 30, 2024 were $12.2 million and $0.29, respectively, compared to a net loss and net loss per share of $6.6 million and $2.01, respectively, for the comparable period in 2023.

About VYNE Therapeutics Inc.

VYNE is a clinical-stage biopharmaceutical company focused on developing differentiated therapies to treat chronic inflammatory and immune-mediated conditions with high unmet need. VYNE's unique and proprietary BET inhibitors, which comprise its InhiBET platform, are designed to overcome limitations of early generation BET inhibitors by leveraging alternative routes of administration and enhanced selectivity.

For more information about VYNE Therapeutics Inc. or its product candidates, visit www.vynetherapeutics.com. VYNE may use its website to comply with its disclosure obligations under Regulation FD. Therefore, investors should monitor VYNE's website in addition to following its press releases, filings with the U.S. Securities and Exchange Commission, public conference calls, and webcasts.

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Cautionary Statement Regarding Forward-Looking Statements

This release includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including, but not limited to, statements regarding VYNE's ability to successfully complete its Phase 1a trial of VYN202, future clinical trials of VYN202, the expected enrollment and timing for reporting top-line results from trials of VYN201 and VYN202, VYNE's projected cash runway, and other statements regarding the future expectations, plans and prospects of VYNE. All statements in this press release which are not historical facts are forward-looking statements. Any forward-looking statements are based on VYNE's current knowledge and its present beliefs and expectations regarding possible future events and are subject to risks, uncertainties and assumptions that could cause actual results to differ materially and adversely from those set forth or implied by such forward-looking statements. These risks and uncertainties include, but are not limited to VYNE's ability to successfully develop its product candidates the timing of commencement of future preclinical studies and clinical trials VYNE's ability to complete and receive favorable results from clinical trials of its product candidates VYNE's ability to obtain additional funding, either through equity or debt financing transactions or collaboration arrangements and VYNE's ability to comply with various regulations applicable to its business. For a discussion of other risks and uncertainties, and other important factors, any of which could cause VYNE's actual results to differ from those contained in the forward-looking statements, see the section titled "Risk Factors" in VYNE's Annual Report on Form 10-K for the year ended December 31, 2023, and VYNE's other filings from time to time with the U.S. Securities and Exchange Commission. Although VYNE believes these forward-looking statements are reasonable, they speak only as of the date of this announcement and VYNE undertakes no obligation to update publicly such forward-looking statements to reflect subsequent events or circumstances, except as otherwise required by law. Given these risks and uncertainties, you should not rely upon forward-looking statements as predictions of future events.

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