Merck to Acquire Cidara Therapeutics for $9.2 Billion, Gaining Late-Stage Antiviral Agent CD388

Merck MSD

Merck has announced a definitive agreement to acquire Cidara Therapeutics for approximately $9.2 billion in an all-cash deal. The strategic acquisition centers on Cidara’s lead candidate, CD388, a potentially first-in-class, long-acting antiviral designed for the universal prevention of influenza A and B, which is currently in Phase 3 trials. The transaction is expected to close in the first quarter of 2026.