ARCBEST CORP /DE/

As of the end of the period covered by this report, an evaluation was performed by the Company’s management, under the supervision and with the participation of the Company’s Principal Executive Officer and Principal Financial Officer, of the effectiveness of the design and operation of the Company’s disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)). Based on such evaluation, the Company’s Principal Executive Officer and Principal Financial Officer have concluded that the Company’s disclosure controls and procedures were effective as of March 31, 2026 at the reasonable assurance level.

There have been no changes in the Company’s internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.