$MRK · Merck & Co., Inc.

This SEC Form 4 reports a change in beneficial ownership by Surendralal Lanca Karsanbhai, a director of Merck & Co., Inc. On September 30, 2026, the reporting person acquired 111.8299 phantom stock units at a price of $145.31 per unit. After the transaction, the reporting person beneficially owned 5,667.0117 phantom stock units. These phantom stock units are granted on a one-for-one basis with Merck common stock and are to be settled entirely in cash upon the reporting person’s termination of service, according to a distribution schedule elected under the Plan for Deferred Payment of Directors’ Compensation.

The filing also notes that the reported holdings include shares acquired through dividend reinvestment transactions. No actual shares of common stock were acquired or disposed of in the reported transaction. The form was signed by an attorney-in-fact on October 1, 2026.