Enterprise Bancorp, Inc. (Enterprise) operates as the holding company of Enterprise Bank and Trust Company referred to as Enterprise Bank (the Bank). All of the Company�s operations are conducted through the Bank. The Bank is a state-chartered commercial bank. It is engaged in the business of attracting deposits from the general public and investing in commercial loans and investment securities. Through the Bank and its subsidiaries, it offers a range of commercial and consumer loan products, deposit and cash management products, investment advisory and management, trust and insurance services. The Company�s primary market area is the Merrimack Valley and North Central regions of Massachusetts and Southern New Hampshire. As of December 31, 2012, Enterprise had 20 full-service branch banking offices.