$MRK · Merck & Co., Inc.

Merck & Co. filed a Form 4 on November 3, 2026, reporting transactions by director Paul J. Diaz. According to the filing, on November 1, 2026, Diaz disposed of 200 shares of Merck common stock that he held directly. The form also indicates that he continued to beneficially own 96 shares indirectly through his revocable trust.

In addition, the filing reports that Diaz acquired 613.073 units of phantom stock under the Plan for Deferred Payment of Directors' Compensation. These phantom stock units are derivative securities with a reported value of $149.52 per unit, based on the closing price of Merck common stock on the business day immediately before the effective date of the director's service. The units will not be settled in shares; rather, they are to be paid entirely in cash upon Diaz's termination of service, following a distribution schedule he elected under the plan. The filing does not describe any other transactions or corporate events.