X0508 4 2025-01-14 0000836147 MIDDLEFIELD BANC CORP MBCN 0001976448 Wilson Thomas M 15985 EAST HIGH STREET MIDDLEFIELD OH 44062 1 EVP-Chief Strategy Officer 0 Common Stock 12498 I held in IRA Common Stock 7285 D Conditional Stock Award 2025-01-14 4 A 0 2685 A 2028-01-14 Common Stock 2685 2685 D Conditional Stock Award 2027-09-06 Common Stock 2561 2561 D Conditional Stock Award 27.4000 2026-03-10 Common Stock 1321 1321 D The award represents grant of restricted stock which vests ratably over a three-year period provided that Mr. Wilson remains continuously employed by Middlefield as of each vesting date. Until the award vests, the award confers no right to vote, no right to dividends, and no other shareholder rights to the recipient. The details of the vesting conditions may be found in a Form 8K filing dated January 17, 2025 Each restricted stock unit represents the right to receive, at settlement, one share of common stock. The award represents a grant of restricted stock which vests ratably over a three-year period provided that Mr. Wilson remains continuously employed by Middlefield as of each vesting date. Until the award vests, the award confers no right to vote, no right to dividends, and no other shareholder rights to the recipient. Until the award vests, the award confers no right to vote, no right to dividends, and no other shareholder rights to the recipient. Vesting is subject to a time-based or service condition and a performance-based condition. The details of the vesting conditions may be found in a Form 8K filing dated March 17, 2023. /s/ Thomas M. Wilson by Julie E. Shaw Power of Attorney 2025-01-23