Tranche Update on Middlefield Banc Corp.'s Equity Buyback Plan announced on April 16, 2019.

Middlefield Banc Corp. is a bank holding company. The Company's subsidiaries include The Middlefield Banking Company (MBC) (the Bank) and EMORECO Inc. MBC is engaged in the general commercial banking business in northeastern, central, and western Ohio. MBC offers customers a range of banking services, including checking, savings, negotiable order of withdrawal (NOW) accounts, money market accounts, time deposits, commercial loans, real estate loans, a variety of consumer loans, safe deposit facilities, and travelers’ checks. MBC offers online banking and bill payment services to individuals and online cash management services to business customers through its website at www.middlefieldbank.bank. The Bank operates approximately 21 full-service banking centers and a financial brokerage office serving Ada, Beachwood, Bellefontaine, Chardon, Cortland, Dublin, Garrettsville, Kenton, Mantua, Marysville, Middlefield, and others. MBC also operates a loan production office in Mentor, Ohio.