0001402829 2026-09-18 2026-09-18 0001402829 false 8-K 2026-09-18 ORION GROUP HOLDINGS, INC. DE 1-33891 26-0097459 2940 Riverby Road, Suite 400 Houston TX 77020 713 852-6500 false false false false Common stock, $0.01 par value per share ORN NYSE false