X0306 4/A 2021-05-24 2021-05-24 0 0000836147 MIDDLEFIELD BANC CORP MBCN 0001223991 STACY DONALD L 15985 EAST HIGH STREET P. O. BOX 35 MIDDLEFIELD OH 44062 0 1 0 0 Treasurer/CFO Common Stock 2021-05-24 4 A 0 393 23.83 A 8914.887 D Common Stock 2021-05-24 4 F 0 118 23.83 D 8796.887 D Common Stock 4036 I held in IRA Common Stock 42.574 D Conditional Stock Award 22.05 2024-02-23 Common Stock 2467 2467 D Conditional Stock Award 26.09 2023-02-25 Common Stock 2076 2076 D Conditional Stock Award 21.215 2022-03-01 Common Stock 2490 2490 D Acquisition represents the vesting of performance shares granted to the reporting person on May 22, 2018, which vested on the third anniversary of their grant date based upon the Company's total shareholder return. Includes shares acquired under the MBCN Dividend Reinvestment Plan. held jointly with son 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 8-K filing dated February 25, 2021. 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 8-K filing dated February 26, 2020. 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 8-K filing dated March 5, 2019. This filing corrects a filing of May 24, 2021, which did not account for shares withheld for tax liability. Donald L. Stacy by James R. Heslop, II Power of Attorney 2021-06-03