Mississippi's 100 Biggest Trucking Fleets (2026)

Nightly aggregation of the FMCSA census puts Mississippi at 12,664 active motor carriers running roughly 94,429 power units combined, and about 50% of those carriers are single-truck owner-operators. Average active fleet size works out to 8.9 trucks.

188 new MS carrier registrations appeared in the last 90 days — and 453 registrations carry an FMCSA prior-revocation link, the raw material of chameleon re-registrations.

SOUTHERN TIRE MART LLC out of COLUMBIA tops the MS ranking with 2217 power units on its latest MCS-150. Its complete vetting workup — risk flags, score breakdown, insurance filings, and record timeline — is at https://mclookup.com/carrier/1157500.

The list orders every carrier headquartered in MS by self-reported power units, filtered for plausibility (a driver-to-truck ratio between 0.3 and 5.0 screens out data-entry junk like thousand-truck fleets with zero drivers). Showing the top 100 of 3,438 qualifying carriers; every row links to that carrier's full public record.

Yes — this page only surfaces the largest fleets. Any of the 3,438 registered MS carriers can be pulled up by typing its USDOT or MC number into the search bar, which returns the same risk-flag screening, score breakdown, and month-over-month record history.