On January 8, 2019, Chairman Carolyn J. Turk advised the Board of Directors of Middlefield Banc Corp. that she did not wish to serve as Chairman of the Board of Directors after the annual meeting of shareholders currently scheduled to be held in May 2019. Mrs. Turk will continue to serve as Chairman of the Board of Directors until the annual meeting. Mrs. Turk intends to remain a member of the Board of Directors of Middlefield Banc Corp. and its subsidiary, The Middlefield Banking Company, assuming that shareholders re-elect her as a Middlefield Banc Corp. director at the 2019 annual meeting of shareholders. The action of Mrs. Turk was not precipitated by any disagreement with or action by the Board of Directors and management of Middlefield Banc Corp. Mrs. Turk’s commitments do not provide her with the time to serve as Chairman after the 2019 annual shareholder meeting.