SCHEDULE 13G

ArcBest Corp

Common Stock · CUSIP: 03937C105

Event date: 2025-12-31

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• American Century Investment Management, Inc.

  Shares: 1,307,223.00 · Class: 5.8%

• American Century Companies, Inc.

  Shares: 1,307,223.00 · Class: 5.8%

• Stowers Institute for Medical Research

  Shares: 1,307,223.00 · Class: 5.8%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.