Merck stock falls 2.63 percent at the close

At the close on September 23, 2026, Merck stock was at USD 146.94 on the NYSE, down 2.63 percent. The shares opened at USD 151.45 and reached a low of USD 146.90 during the session.

Merck stock closed at USD 146.94 on the NYSE on September 23, 2026, down 2.63 percent from the prior close. The shares opened at USD 151.45 and reached a session low of USD 146.90, leaving the close USD 4.51 below the opening price.

September 23, 2026 in numbers

Merck & Co., Inc. (ISIN US58933Y1055, NYSE: MRK) finished USD 4.51 below the open and USD 9.97 below the 52-week high of USD 156.91 recorded on August 26, 2026. The session level was also below the previous close of USD 150.91, which had been reported for September 22, 2026.

The stock was among the weaker names in the Dow Jones Industrial Average during the session, according to Finanzen.ch. Merck shares traded between USD 146.90 and USD 151.45, a USD 4.55 intraday range.

After-hours session runs until 8:00 p.m. ET

The next U.S. trading session is scheduled for September 24, 2026. Merck stock remains in the after-hours phase after the regular-session close, while the next market-moving company event is listed only when dated and substantiated by an external calendar or company announcement.