Walmart, Amazon, and AT&T lead the list of private fleets with the most trailers, highlighting the importance of company-owned transportation networks.
Food distributors such as Kroger, PepsiCo, Performance Food Group, and Sysco also remain among the largest private fleet operators, supporting stores and restaurants across the country.
Construction and utility companies continue to expand their transportation operations, with businesses like Quanta Services, Asplundh, and MasTec appearing in the top rankings.
Industry experts say private fleets give companies more control over deliveries, inventory, and customer service while helping reduce supply chain disruptions.
The latest rankings also show small changes from last year, with new companies entering the top 10 and others moving up or down as transportation needs continue to change.