First Seacoast Bancorp is a savings and loan holding company that operates a federally-chartered savings bank serving southeastern New Hampshire and southern Maine through five branch offices. The bank's primary business is gathering deposits from the general public and deploying those funds into residential real estate loans, commercial real estate loans, construction lending, commercial and industrial loans, and consumer loans, with residential mortgages representing the largest segment of the portfolio. The company generates revenue primarily from net interest income on its loan and securities portfolio, supplemented by non-interest income from customer service fees and through its wealth management division, which provides portfolio management and retirement planning services to clients in its market area.