NB Bancorp, Inc. is a bank holding company operating through its subsidiary Needham Bank, a community-focused commercial bank serving small to mid-sized businesses, professionals, and retail customers across the greater Boston metropolitan area, southern New Hampshire, and northern Rhode Island. The company offers a comprehensive portfolio of commercial and retail banking services including commercial real estate and construction lending, one-to-four-family residential mortgages, commercial and industrial loans, deposit accounts, cash management, and mortgage warehouse lending to national clients, with specialized lending expertise in cannabis and solar industries. NB Bancorp generates revenue primarily through net interest income from the spread between loan yields and deposit costs, supplemented by noninterest income from customer service fees, mortgage banking activities, and ancillary services.