0000935036 2026-06-02 2026-06-02 false 0000935036 8-K 2026-06-02 0-25346 ACI WORLDWIDE, INC. DE 47-0772104 6060 Coventry Drive Elkhorn NE 68022 (402) 390-7600 false false false false Common Stock, $0.005 par value ACIW NASDAQ false