Transportation contractors once again dominate the top spots in our annual list of the Top 150 U.S. Postal Service Suppliers. In fiscal year 2016, USPS spent over $14 billion on outside purchases, about half of that for transportation. As it has since 2002, Federal Express Corporation lands atop the list, this year with $1.678 billion in revenues – about a $300 million increase from last year. FedEx carries package and letter mail for the Postal Service. FedEx’s air cargo network contract with the Postal Service was recently renewed for a five-year period, extending the contract until September 29, 2024.