Middlefield Banc Corp Tapped President Ronald L. Zimmerly, Jr. as CEO, Succeeding James R. Heslop Who Will Retire Effective January 1

Middlefield Banc Corp. (NASDAQ:MBCN) today announced the Company has appointed Ronald L. Zimmerly, Jr. as Chief Executive Officer, succeeding James R. Heslop, II. Mr. Zimmerly, currently President and Director of Middlefield Banc Corp. ("Middlefield" or the "Company") and The Middlefield Banking Company (the "Bank"), will assume the role of Chief Executive Officer of both entities on January 1, 2024, upon Mr. Heslop's retirement. Mr. Heslop will resign from the Middlefield Banc Corp. Board of Directors on December 31, 2023. The Company's Board of Directors has taken action to reduce the size of its Board of Directors from 13 to 12 effective on December 31, 2023.