United Parcel Service, Inc. (UPS) is a package delivery and logistics company founded in 1907, headquartered in Sandy Springs, and led by Chief Executive Officer Carol Tomé. It serves shipping customers that need to move documents, parcels, palletized freight and other goods, as well as businesses that need logistics, distribution, customs and returns support. UPS operates an integrated air-and-ground transportation network.

FedEx is a transportation, e-commerce and business-services company founded in 1971, headquartered in Memphis, and led by President and Chief Executive Officer Rajesh Subramaniam. It moves packages and freight for businesses and consumers through an integrated air-and-ground network, while also providing customs brokerage, freight forwarding, supply-chain services, retail shipping access, printing and data-enabled logistics tools.

Expeditors International of Washington, Inc. is a global third-party logistics provider founded in 1979 and headquartered in Seattle. Daniel R. Wall is President and Chief Executive Officer.

J.B. Hunt Transport Services is a North American surface transportation, delivery and logistics company. Founded in 1961 and headquartered in Lowell, it provides freight movement, brokerage and delivery services in the continental United States, Canada and Mexico.

FedEx Freight is a North American less-than-truckload, or LTL, freight transportation provider headquartered in Memphis, Tennessee. LTL means it combines shipments from multiple customers in the same trailer rather than dedicating a whole trailer to one shipper.