ALNY ▼ -4.9% - Alnylam Pharmaceuticals, Inc. $ALNY down pm I can't write a meaningful explanation based on this headline. The headline "$ALNY down pm" only states that the stock is down in after-hours trading but provides no reason for the decline. To write an accurate summary, I would need a headline that explains what news or event triggered the move. 28-AUG-2026 07:56 AM ET