0000903419 2026-05-22 2026-05-22 false 0000903419 8-K 2026-05-22 Alerus Financial Corporation DE 001-39036 45-0375407 401 Demers Avenue Grand Forks ND 58201 701 795-3200 false false false false Common Stock, $1.00 par value per share ALRS NASDAQ false