X0508 4 2026-03-02 1 0000836147 MIDDLEFIELD BANC CORP MBCN 0001694710 Bevan Thomas W 15985 EAST HIGH STREET MIDDLEFIELD OH 44062 1 0 Common Stock 2026-03-02 4 D 0 26558 D 0 D Common Stock 2026-03-02 4 D 0 26530 D 0 D Disposed of pursuant to the Agreement and Plan of Merger, dated October 22, 2025 (the "Agreement"), by and between Middlefield Banc Corp. ("Middlefield") and Farmers National Banc Corp. ("Farmers"), pursuant when Middlefield merged with and into Farmers on March 2, 2026 (the "Closing Date"). Pursuant to the Agreement each share of Middlefield common stock issued and outstanding immediately prior to the effective time of the Merger (the "Effective Time") (other than certain shares held by Middlefield or Farmers) was converted into the right to receive 2.6 shares (the "Exchange Ration") of Farmers common stock. /s/ Thomas W. Bevan by Julie E. Shaw Power of Attorney 2026-03-02