0000002098 2026-04-28 2026-04-28 false 0000002098 8-K 2026-04-28 ACME UNITED CORPORATION CT 001-07698 06-0236700 1 Waterview Dr Shelton CT 06484 203 254-6060 false false false false Common Stock, $2.50 par value per share ACU NYSEAMER false