Cambridge Bancorp is a bank holding company. The Company's segment is community banking business, which consists of commercial banking, consumer banking, and trust and investment management services. Cambridge Trust Company (the Bank) is a subsidiary of the Company. The Bank offers a range of commercial and consumer banking services through its network of over 10 banking offices in Massachusetts. The Bank is engaged in the business of attracting deposits from the public and investing those deposits. The Bank invests those funds in various types of loans, including residential and commercial real estate, and a range of commercial and consumer loans. The Bank also invests its deposits and borrowed funds in investment securities, and has over three Massachusetts Security Corporations, including CTC Security Corporation, CTC Security Corporation II and CTC Security Corporation III.