$MRK · Merck & Co., Inc.

This SEC filing is a Form 3 initial statement of beneficial ownership filed for Paul J. Diaz in connection with Merck & Co., Inc. The form indicates that, as of November 1, 2026, Mr. Diaz became a director of the company. A Form 3 is a routine regulatory filing required when an individual first becomes a corporate insider such as a director or officer, and it discloses their holdings in the company’s securities.

According to the filing, Mr. Diaz directly owns 200 shares of Merck common stock. He also indirectly owns 96 shares through his revocable trust. No derivative securities, such as stock options or convertible securities, were reported in the filing. The form was signed on his behalf by an attorney-in-fact on November 3, 2026.