X0306 4 2022-01-03 0 0000836147 MIDDLEFIELD BANC CORP MBCN 0001223976 CALDWELL THOMAS G 15985 EAST HIGH STREET P. O. BOX 35 MIDDLEFIELD OH 44062 1 1 0 0 President/Chief Executive Offi Common Stock 2022-01-03 4 A 0 314 24.80 A 18532 D Common Stock 31627.311 D Common Stock 536.148 I Custodian for Children Conditional Stock 22.50 2024-02-23 Common Stock 5291 5291 D Conditional Stock 26.09 2023-02-25 Common Stock 4387 4387 D Conditional Stock 21.215 2022-03-01 Common Stock 5396 5396 D Shares acquired under Director Compensation program for members of the Board of Directors of The Middlefield Banking Company. Includes shares acquired under MBCN Dividend Reinvestment Plan. Includes shares held jointly with spouse. 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. Thomas G. Caldwell by James R. Heslop, II Power of Attorney 2022-01-04