| AAL | American Airlines Group | DAL | Delta Air Lines | LSTR | Landstar System | R | Ryder System |
| ALK | Alaska Air | EXPD | Expeditors | LUV | Southwest Airlines | UAL | United Continental |
| CAR | Avis Budget Group | FDX | Fedex Corp | MATX | Matson | UBER | Uber |
| CHRW | CH Robinson Worldwide | JBHT | JB Hunt Transport | NSC | Norfolk Southern | UNP | Union Pacific |
| CSX | CSX Corp | KEX | Kirby Corp | ODFL | Old Dominion Freight Line | UPS | United Parcel |