Here's your cash, stuck in the Middlefield Banc with you. The firm is the holding company for The Middlefield Banking Company (Middlefield Bank) and Emerald Bank (acquired in 2007), which have about 10 offices in northeastern and central Ohio. The community banks offer standard deposit services such as checking and savings accounts, CDs, and IRAs. Investments, insurance, and brokerage services are offered through an agreement with UVEST, a division of LPL Financial. Residential mortgage loans comprise more than 60% of the company's loan portfolio; commercial and industrial loans make up about 20%. The banks also offer commercial mortgages, construction loans, and consumer installment loans.