0000878927 2026-05-20 2026-05-20 false 0000878927 8-K 2026-05-20 OLD DOMINION FREIGHT LINE, INC. VA 0-19582 56-0751714 500 Old Dominion Way Thomasville NC 27360 336 889-5000 Not Applicable false false false false Common Stock ($0.10 par value) ODFL NASDAQ false