Merck stock declined by 2.63 percent at the close on September 23, 2026, finishing at USD 146.94 on the NYSE.
The shares had opened at USD 151.45 and reached a session low of USD 146.90, leaving the close USD 4.51 below the opening price.
Merck stock was among the weaker names in the Dow Jones Industrial Average during the session, according to Finanzen.ch.
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