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 breaks down these companies into categories based on equipment, cargo types, and industry segments. This media gallery focuses on transportation fleets. See also: 2025 FleetOwner 500: Top private sanitation fleetsThe shortest category for the FO500, there are only four private fleets on this list. To learn more about each private fleet, click through the above media gallery.