For the quarterly period ended September 30, 2025 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 000-19969 ARCBEST CORPORATION Table of Contents (Address, including zip code, and telephone number, including area code, of the registrant's p ...