The 2025 FleetOwner 500: Private list ranks the most prominent private carriers in the U.S. by total registered power units. Released in April, the FO500 saw many ranking shifts after a busy 2024 of carrier acquisitions, mergers, consolidations, and expansions.
In addition to ranking the largest private fleet operations overall, FleetOwner breaks down these companies into categories based on equipment, cargo types, and industry segments. This media gallery focuses on sanitation fleets.
See also: 2025 FleetOwner 500: Top private retail/wholesale fleets
No. 1 in this top 10 and the entire private list is WM. The rest of the top five spots on this sanitation list remain the same as in 2024. But new to this top 10 in 2025 is Priority Waste at No. 10. Casella Waste Systems achieved moderate growth this year and moved up three spots in these rankings to No. 7.
To learn more about each private fleet, click through the above media gallery.
