Merck (MRK) Stock After Hours on Dec. 12, 2025: Winrevair EU Tailwind, Analyst Targets, and What to Watch Before the Next Open
Merck shares closed at $100.30 on Friday, up 1.3%, outperforming the S&P 500’s 1.07% drop. The gain followed news that the EU’s CHMP recommended expanded approval for Winrevair in pulmonary arterial hypertension. After-hours trading was flat. Merck remains about 5% below its 52-week high.