The largest trucking companies in the US.

How the list is ranked

Every carrier here holds an active for-hire operating authority and reports its fleet on the MCS-150. Each is ranked by the smaller of its power units and its drivers: a few filings claim thousands of trucks and a handful of drivers, and the smaller figure keeps them from leading. Bus and motorcoach fleets are left out, and so are carriers registered in the last three years that report 500 or more power units, which no new company has in practice.

Fleet size is not revenue. Rankings by revenue, such as the trade-press top 100 lists, put asset-light brokers and logistics groups higher. This list counts the trucks and drivers registered under one USDOT number, so a group with several operating companies appears once for each. Some are private fleets with a for-hire authority, such as Walmart’s.