Old Dominion Freight Line, Inc. operates as a less-than-truckload motor carrier in the United States and North America. The company offers regional, inter-regional, and national less-than-truckload services, as well as expedited transportation. It also provides various value-added services, including container drayage, truckload brokerage, and supply chain consulting. As of December 31, 2023, it owned and operated 10,791 tractors, 31,233 linehaul trailers, and 15,181 pickup and delivery trailers; 46 fleet maintenance centers; and 257 service centers. Old Dominion Freight Line, Inc. was founded in 1934 and is headquartered in Thomasville, North Carolina.

TFI International Inc., together with its subsidiaries, provides transportation and logistics services in the United States and Canada. The company operates through Package and Courier, Less-Than-Truckload (LTL), Truckload (TL), and Logistics segments. The Package and Courier segment engages in the pickup, transport, and delivery of items in North America. The LTL segment is involved in the pickup, consolidation, transportation, and delivery of smaller loads. The TL segment offers expedited transportation, flatbed, tank, container, and dedicated services. This segment also carries full loads directly from the customer to the destination using a closed van or specialized equipment. The Logistics segment provides asset-light logistics services, including brokerage, freight forwarding, and transportation management, as well as small package parcel delivery. As of December 31, 2023, it operates 11,455 trucks, 34,599 trailers, and 7,504 independent contractors. The company was formerly known as TransForce Inc. and changed its name to TFI International Inc. in December 2016. TFI International Inc. was founded in 1957 and is headquartered in Saint-Laurent, Canada.

Knight-Swift Transportation Holdings Inc., together with its subsidiaries, provides freight transportation services in the United States and Mexico. The company operates through four segments: Truckload, Less-than-truckload (LTL), Logistics, and Intermodal. The Truckload segment provides transportation services, which include irregular route and dedicated, refrigerated, expedited, flatbed, and cross-border operations. This segment operated an average of 20,948 tractors, which comprised 18,821 company tractors and 2,127 independent contractor tractors, as well as 87,865 trailers. The LTL segment provides regional LTL transportation services through a network of approximately 120 service centers; and offers national coverage through partner carrier outside the network. This segment operated an average of 3,201 tractors and 8,482 trailers. The Logistic segment offers brokerage and other freight management services through third-party transportation providers and equipment. The Intermodal segment offers transportation services, including freight through third-party intermodal rail services on trailing equipment, such as containers and trailers on flat cars; and drayage services. This segment operated an average of 639 tractors and 12,730 intermodal containers. The company also provides repair and maintenance shop, equipment leasing, warranty, and insurance services; and warehousing and driving academy services, as well as manufactures trailer parts. It serves retail, food and beverage, consumer and paper products, transportation and logistics, housing, and building, automotive, and manufacturing industries. Knight-Swift Transportation Holdings Inc. was incorporated in 1989 and is headquartered in Phoenix, Arizona.

Schneider National, Inc., together with its subsidiaries, provides surface transportation and logistics solutions in the United States, Canada, and Mexico. It operates through three segments: Truckload, Intermodal, and Logistics. The Truckload segment offers over the road freight transportation services primarily through dry van, bulk, temperature-controlled, and flat-bed trailers across either network or dedicated configurations. The Intermodal segment provides door-to-door container on flat car services through a combination of rail and dray transportation using company-owned containers, chassis, and trucks. The Logistics segment offers asset-light freight brokerage, supply chain, warehousing, and import/export services to manage and move its customers' freight. The company leases equipment, such as trucks to owner-operators; and provides insurance for the company drivers and owner-operators. Schneider National, Inc. was founded in 1935 and is headquartered in Green Bay, Wisconsin.

Hub Group, Inc., a supply chain solutions provider, offers transportation and logistics management services in North America. The company's transportation services include intermodal, truckload, less-than-truckload, flatbed, temperature-controlled, and dedicated and regional trucking, as well as final mile, railcar, small parcel, and international transportation. Its logistics services comprise full outsource logistics solution, transportation management, freight consolidation, warehousing and fulfillment, final mile delivery, and parcel and international services. The company also provides dry van, expedited, less-than-truckload, refrigerated, and flatbed truck brokerage services. It offers a fleet of approximately 2,300 tractors, 460 independent owner-operators, and 4,300 trailers to its customers, as well as the management and infrastructure. The company serves a range of industries, including retail, consumer products, and durable goods. As of December 31, 2023, it owned approximately 50,000 dry, 53-foot containers, as well as 900 refrigerated and 53-foot containers. The company was founded in 1971 and is headquartered in Oak Brook, Illinois.

P.A.M. Transportation Services, Inc., through its subsidiaries, operates as a truckload transportation and logistics company in the United States, Mexico, and Canada. The company operates a truckload dry van carrier that transports general commodities, such as automotive parts; expedited goods; consumer goods, such as general retail store merchandise; and manufactured goods, including heating and air conditioning units. The company also provides brokerage and logistics services. As of December 31, 2023, it operated a fleet of 2,200 trucks, which included 300 independent contractor trucks; and 8,567 trailers. The company was founded in 1980 and is headquartered in Tontitown, Arkansas.

Pamt Corp., through its subsidiaries, operates as a truckload transportation and logistics company in the United States, Mexico, and Canada. The company operates a truckload dry van carrier that transports general commodities, such as automotive parts; expedited goods; consumer goods, such as general retail store merchandise; and manufactured goods, including heating and air conditioning units. The company also provides brokerage and logistics services. As of December 31, 2023, it operated a fleet of 2,200 trucks, which included 300 independent contractor trucks; and 8,567 trailers. The company was formerly known as P.A.M. Transportation Services, Inc., and changed its name to Pamt Corp. in November 2024. The company was founded in 1980 and is headquartered in Tontitown, Arkansas.

Covenant Logistics Group, Inc., together with its subsidiaries, provides transportation and logistics services in the United States. It operates through four segments: Expedited, Dedicated, Managed Freight, and Warehousing. The Expedited segment primarily provides truckload services with high service freight and delivery standards, such as 1,000 miles in 22 hours or 15-minute delivery windows. Its Dedicated segment provides customers with committed truckload capacity over contracted periods with the goal of three to five years in length using equipment either owned or leased by the company. The Managed Freight segment offers brokerage services, including logistics capacity by outsourcing the carriage of customers' freight to third parties; and transport management services, such as logistics services on a contractual basis to customers who prefer to outsource their logistics needs. Its Warehousing segment provides day-to-day warehouse management services to customers, as well as shuttle and switching services related to shuttling containers and trailers. The company also engages in used equipment sales and leasing business. It serves transportation companies, such as parcel freight forwarders, less-than-truckload carriers, and third-party logistics providers; and traditional truckload customers, including manufacturers, retailers, and food and beverage shippers. The company was formerly known as Covenant Transportation Group, Inc. and changed its name to Covenant Logistics Group, Inc. in July 2020. Covenant Logistics Group, Inc. was founded in 1986 and is based in Chattanooga, Tennessee.