0001943802 2026-05-04 2026-05-04 false 0001943802 8-K 2026-05-04 FIRST SEACOAST BANCORP, INC. MD 001-41597 92-0334805 633 Central Avenue Dover NH 03820 (603) 742-4680 false true false false Common stock, par value $0.01 per share FSEA NASDAQ false