Merck stock (MRK): News, dividend date, Keytruda updates and analyst forecasts to watch before the U.S. market opens Dec. 15, 2025
Merck shares closed at $100.30 on Dec. 12, ahead of the Dec. 15 ex-dividend date for a $0.85 quarterly payout. The stock sits 5.2% below its 52-week high, with Friday’s volume at 11.8 million shares, under the 50-day average. Investors are watching the impact of the dividend reset and ongoing developments around Keytruda and RSV products.