Sky Financial Group, Inc., was a diversified financial services holding company that operated in the Midwestern United States from 1998 until its 2007 acquisition by rival bank Huntington Bancshares. Its largest subsidiary was Sky Bank, a commercial and retail banking company headquartered in Salineville, Ohio, that operated 330 financial centers and over 400 ATMs in Ohio, Pennsylvania, Indiana, Michigan and West Virginia. Other wholly owned subsidiaries included investment, trust, and insurance services.