Union Pacific Corporation, through its subsidiary, Union Pacific Railroad Company, operates in the railroad business in the United States. The company offers transportation services for grain and grain products, fertilizers, food and refrigerated products, and coal and renewables to grain processors, animal feeders, ethanol producers, renewable biofuel producers, and other agricultural users; and construction products, industrial chemicals, plastics, forest products, specialized products, metals and ores, petroleum, liquid petroleum gases, soda ash, and sand, as well as finished automobiles, automotive parts, and merchandise in intermodal containers. Union Pacific Corporation was founded in 1862 and is headquartered in Omaha, Nebraska.

Canadian National Railway Company, together with its subsidiaries, engages in the rail, intermodal, trucking, and marine transportation and logistics business in Canada and the United States. The company provides rail services, which include equipment, custom brokerage services, transloading and distribution, business development and real estate, and private car storage services; and intermodal services, such as temperature controlled cargo, port partnerships, and logistics parks. It offers trucking services, such as door-to-door services, import and export dray, interline services, and specialized services, comprising flatbed trucks, on-deck mobile transport trays, expedited cargo, and permit/overweight services; and supply chain services. It serves automotive, coal, fertilizers, temperature controlled cargo, forest products, dimensional, grain, metal and minerals, petroleum and chemicals, consumer goods, and third party logistics applications. The company operates a rail network of approximately 20,000 route-miles of track and shipping spanning. Canadian National Railway Company was incorporated in 1919 and is headquartered in Montreal, Canada.

CSX Corporation, together with its subsidiaries, provides rail-based freight transportation services. The company offers rail services; and transportation of intermodal containers and trailers, as well as other transportation services, such as rail-to-truck transfers and bulk commodity operations. It also transports chemicals, agricultural and food products, minerals, automotive, forest products, fertilizers, and metals and equipment; and coal, coke, and iron ore to electricity-generating power plants, steel manufacturers, and industrial plants, as well as exports coal to deep-water port facilities. In addition, the company provides intermodal services through a network of approximately 30 terminals transporting manufactured consumer goods in containers; and drayage services, including the pickup and delivery of intermodal shipments. It serves the automotive industry with distribution centers and storage locations, as well as connects non-rail served customers through transferring products, such as plastics and ethanol from rail to trucks. The company operates approximately 20,000 route mile rail network, which serves various population centers in 26 states east of the Mississippi River, the District of Columbia, and the Canadian provinces of Ontario and Quebec, as well as owns and leases approximately 3,500 locomotives. It serves production and distribution facilities through track connections. CSX Corporation was incorporated in 1978 and is headquartered in Jacksonville, Florida.

PACCAR Inc designs, manufactures, and distributes light, medium, and heavy-duty commercial trucks in the United States, Canada, Europe, Mexico, South America, Australia, and internationally. It operates through three segments: Truck, Parts, and Financial Services. The Truck segment designs, manufactures, and distributes trucks for the over-the-road and off-highway hauling of commercial and consumer goods. It sells its trucks through a network of independent dealers under the Kenworth, Peterbilt, and DAF nameplates. The Parts segment distributes aftermarket parts for trucks and related commercial vehicles. The Financial Services segment conducts full-service leasing operations under the PacLease trade name, as well as provides finance and leasing products and services to customers and dealers. This segment also offers equipment financing and administrative support services for its franchisees; retail loan and leasing services for small, medium, and large commercial trucking companies, as well as independent owners/operators and other businesses; and truck inventory financing services to independent dealers. In addition, this segment offers loans and leases directly to customers for the acquisition of trucks and related equipment. The company also manufactures and markets industrial winches under the Braden, Carco, and Gearmatic nameplates. PACCAR Inc was founded in 1905 and is headquartered in Bellevue, Washington.

Packaging Corporation of America manufactures and sells containerboard and corrugated packaging products in the United States. The company operates through three segments: Packaging, Paper, and Corporate and Other. The Packaging segment offers various containerboard and corrugated packaging products, such as conventional shipping containers used to protect and transport manufactured goods; multi-color boxes and displays that help to merchandise the packaged product in retail locations; and honeycomb protective packaging products, as well as packaging for meat, fresh fruit and vegetables, processed food, beverages, and other industrial and consumer products. This segment sells its corrugated products through a direct sales and marketing organization, independent brokers, and distribution partners. The Paper segment manufactures and sells commodity and specialty papers, as well as communication papers, including cut-size office papers, and printing and converting papers. This segment sells white papers through its sales and marketing organization. The Corporate and Other segment includes corporate support staff services and related assets and liabilities; and transportation assets, such as rail cars and trucks for transportation. Packaging Corporation of America was founded in 1867 and is headquartered in Lake Forest, Illinois.

GATX Corporation, together its subsidiaries, operates as railcar leasing company in the United States, Canada, Mexico, Europe, and India. It operates through three segments: Rail North America, Rail International, and Portfolio Management. The company leases tank and freight railcars, and locomotives for petroleum, chemical, food/agriculture, and transportation industries. It also offers maintenance services, including the interior cleaning of railcars, routine maintenance and repair of car body and safety appliances, regulatory compliance works, wheelset replacements, interior blast and lining, exterior blast and painting, and car stenciling services. In addition, the company manufactures commercial aircraft jet engines and leases aircraft spare engines; and owns and manages tank containers that are leased to chemical, industrial gas, energy, food, cryogenic and pharmaceutical industries, and tank container operators, as well as provides tank container sourcing, remarketing, and inspection and maintenance services. As of December 31, 2023, it owned and operated a fleet of approximately 148,500 railcars; 493 four-axle and 30 six-axle locomotives; 399 aircraft spare engines; and 23,931 tank containers. GATX Corporation was founded in 1898 and is headquartered in Chicago, Illinois.

Trinity Industries, Inc. provides rail transportation products and services under the TrinityRail name in North America. It operates in two segments, Railcar Leasing and Management Services Group, and Rail Products Group. The Railcar Leasing and Management Services Group segment leases freight and tank railcars; originates and manages railcar leases for third-party investors; and provides fleet maintenance and management services. As of December 31, 2023, it had a fleet of 109,295 railcars. This segment serves industrial shipper and railroad companies operating in agriculture, construction and metals, consumer products, energy, and refined products and chemicals markets. The Rail Products Group segment manufactures freight and tank railcars for transporting various liquids, gases, and dry cargo; and offers railcar maintenance and modification services. This segment serves railroads, leasing companies, and industrial shippers of products in the agriculture, construction and metals, consumer products, energy, and refined products and chemicals markets. It sells or leases products and services through its own sales personnel and independent sales representatives. The company was incorporated in 1933 and is headquartered in Dallas, Texas.

The Greenbrier Companies, Inc. designs, manufactures, and markets railroad freight car equipment in North America, Europe, and South America. It operates through three segments: Manufacturing; Maintenance Services; and Leasing & Management Services. The Manufacturing segment offers covered hopper cars, gondolas, open top hoppers, boxcars, center partition cars, tank cars, sustainable conversions, intermodal railcars, and railcar equipment. The Maintenance Services segment provides wheel services, including reconditioning of wheels and axles, new axle machining and finishing, and downsizing; operates a railcar maintenance network; and reconditions and manufactures railcar cushioning units, couplers, yokes, side frames, bolsters, and various other parts. The Leasing & Management Services segment offers operating leases and per diem leases for a fleet of approximately 15,500 railcars; and management services comprising railcar maintenance management, railcar accounting services, fleet management and logistics, administration, and railcar re-marketing. This segment provides management services for railroads, shippers, carriers, institutional investors, and other leasing and transportation companies. It serves railroads, leasing companies, financial institutions, shippers, carriers, and transportation companies. The company was founded in 1974 and is headquartered in Lake Oswego, Oregon.