NB Bancorp, Inc. is a holding company for Needham Bank (the Bank), which is a Massachusetts-chartered cooperative bank. The Banks lending activities include commercial real estate and multifamily loans, one- to four-family residential real estate loans, construction and land development loans, commercial and industrial loans, and consumer loans. It also invests in securities, consisting primarily of United States treasury and federal agency securities, municipal bonds, and corporate bonds. It also offers a variety of deposit accounts, including certificate of deposit accounts, IRAs, money market accounts, savings accounts, demand deposit accounts and interest-bearing and noninterest-bearing checking accounts. Its primary market area is the Greater Boston metropolitan area and surrounding communities, including eastern Connecticut, southern New Hampshire, and Rhode Island. It has branches in Wellesley, Westwood, Dedham, Medfield, Medford, Dover, Ashland, Millis, and others.