Middlesex Savings Bank is one of the largest mutual savings bank in Massachusetts, with assets exceeding $3.2 billion. In addition to its 22 branch locations, the bank offers account access through its online banking, telephone banking, ATMs and its participation in the SUM Program. The personal banking services provided by the bank include checking and savings accounts, certificates of deposit, mortgages and retirement funds. Middlesex Savings business banking services include checking and deposit accounts, commercial mortgages, merchant services, lines of credit and business credit cards. Weathervane Financial Group, a Middlesex Savings Bank, provides insurance and investment products. In 2002, Middlesex Savings Bank began its charitable foundation, which from its $4.5 million endowment provides grants to organizations located within the banks community reinvestment area. Middlesex Savings Bank is headquartered in Natick, Mass.