| USX | U.S. Xpress Enterprises |
| ULH | Universal Logistics |
| CVLG | Covenant Logistics Group |
| ARCB | ArcBest |
| PTSI | P.A.M. Transportation Services |
| TFII | TFI |
| RXO | RXO |
| MRTN | Marten Transport |
| HTLD | Heartland Express |
| SNDR | Schneider National |
| WERN | Werner Enterprises |
| DSKE | Daseke |