X0508 4 2025-12-18 0001085913 FARMERS & MERCHANTS BANCORP FMCB 0001188761 SANGUINETTI KEVIN 9355 NINE BARK ROAD TRUCKEE CA 96161 true false false false 0 Common Stock 952 D Common Stock 727 I Held by Spouse Common Stock 3921 I Held in a personal trust Common Stock 2250 I Held by a LLC Includes, as previously reported, grants on February 3, 2025 to Reporting Person of a RSA of 147 shares of Issuer's common stock, which will vest ratably over a one (1) year term. These shares of the Issuer's common stock held by the trust were previously reported as directly owned by the Reporting Person. The Reporting Person is a trustee of the trust. The Reporting Person remains the beneficial owner of the securities held by the trust. These shares of the Issuer's common stock held by the LLC were previously reported as directly owned by the Reporting Person. The Reporting Person is a managing member of the LLC. The Reporting Person remains the beneficial owner of the securities held by the trust. Sanguinetti Kevin 2025-12-18