Rapport Therapeutics Reports Third Quarter 2025 Financials and Provides Business Update

About this update from Rapport Therapeutics, Inc.

Positive topline results announced from Phase 2a clinical trial of RAP-219 in patients with focal onset seizures Phase 2 trial of RAP-219 in bipolar mania enrolling patients and on track, with topline results expected in the first half of 2027 Strong balance sheet, bolstered by approximately $269.4 million in net proceeds from recent public offering Ended the quarter with $513.0 million in cash, cash equivalents, and short-term investments, excluding restricted cash, which is expected to fund operations into the second half of 2029 BOSTON and SAN DIEGO , Nov. 06, 2025 (GLOBE NEWSWIRE) -- Rapport Therapeutics, Inc. (Nasdaq: RAPP) (“Rapport” or the “Company”), a clinical-stage biotechnology company dedicated to the discovery and development of small molecule precision medicines for patients with neurological or psychiatric disorders, today reported financial results for the third quarter ending September 30, 2025 , and provided a business update. “The positive Phase 2a results for RAP-219 announced in September underscore both the strength of our precision neuroscience platform and the compound’s differentiated clinical potential,” said Abraham N. Ceesay , chief executive officer of Rapport. “Achieving a nearly 78% median reduction in clinical seizures and seizure freedom in nearly one in four patients positions RAP-219 with a potential best-in-class profile for the treatment of drug-resistant focal onset seizures. With a strengthened balance sheet following our recent public offering, we are in a strong financial position to execute our Phase 3 trials in focal onset seizures and continue advancing our bipolar Phase 2 trial toward topline results expected in the first half of 2027. We remain committed to disciplined execution and delivering sustained value for both patients and shareholders.” BUSINESS HIGHLIGHTS RAP-219 Lead Program Focal Onset Seizures (FOS) Successful Phase 2a Topline Results Announced. In September, the Company reported topline results from its single arm Phase 2a clinical trial of RAP-219 in patients with drug-resistant FOS (n=30). The trial met its primary long episode (LE) endpoints with high statistical significance. The Company expects to present further efficacy analyses later in 2025 and additional data, including results from the 8-week follow-up, in 2026. In the 8-week treatment period, 85.2% of patients achieved ≥30% reduction in LEs – an objective electrographic biomarker for clinical seizure reduction – compared with baseline (p

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