ODFL: Other company developments

Item 8.01. Other Events. On May 21, 2026, the Company issued a press release announcing that its Board of Directors had declared a quarterly cash dividend of $0.29 per share of common stock, payable on June 17, 2026, to shareholders of record at the close of business on June 3, 2026. The press release is attached hereto as Exhibit 99.1 and incorporated herein by reference. Item 9.01. Financial Statements and Exhibits. (d) Exhibits Exhibit No. Description 99.1 Press Release dated May 21, 2026 104 Cover Page Interactive Data File (embedded within the Inline XBRL document) SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. OLD DOMINION FREIGHT LINE, INC. By: /s/ Clayton G. Brinker Clayton G. Brinker Vice President – Accounting and Finance (Principal Accounting Officer) Date: May 21, 2026