Alnylam Pharmaceuticals (ALNY) Stock After Hours: Nasdaq-100 debut, fresh catalysts, and what to watch before Tuesday’s open (Dec. 23)
Dec. 22, 2025 — After the closing bell, Alnylam Pharmaceuticals, Inc. (NASDAQ: ALNY) is finishing the day in the spotlight for a reason that has nothing to do with a clinical readout—at least not directly. Monday marked the company’s first trading day as a Nasdaq-100 constituent, a mechanical event that can reshape near-term flows even when the underlying business story…