The 2025 FleetOwner 500: Private list ranks the most prominent private carriers in the U.S. by total registered power units. In addition to ranking the largest private fleet operations overall, FleetOwner categorizes these companies by equipment, cargo types, and industry segments. See also: 2025 FleetOwner 500: Top private transportation fleetsThis year's top private utility fleets gallery is nearly identical to the 2024 top 10. While AT&T and Verizon are the top fleets of this gallery, the rest of the private fleets are neck-and-neck in the rankings between No. Therefore, while Southwest Gas only fell nine spots in the overall private list, this resulted in major change for this utility gallery.