Alnylam Pharmaceuticals (ALNY) Stock After Hours: What Happened After the Dec. 19, 2025 Close — and What to Watch Before the Next Market Open
Alnylam Pharmaceuticals, Inc. (NASDAQ: ALNY) finished Friday, December 19, 2025, with shares around $400 and little change in after-hours trading — but the setup into the next U.S. session looks more eventful than the calm “after the bell” tape suggests.