MIDDLEFIELD, Ohio, Aug. 11, 2025 (GLOBE NEWSWIRE) -- Middlefield Banc Corp. (NASDAQ: MBCN) today announced that its Board of Directors declared a quarterly cash dividend of $0.21 per common share. The 2025 third-quarter dividend is payable on September 12, 2025, to shareholders of record on August 29, 2025.