Donald K. Kyle

Cummins Southern Plains LLC wholesales and distributes engines and power generation equipment. Its products include engines, power generators, land based drilling modules, filtration and exhaust products, coolants and chemicals, aftertreatment devices, silencing systems, turbochargers, altenators and G-drive engines. The firm offers wholesale parts distribution, retail parts sales and service. The company was founded in 2002 and is headquartered in Austin, TX.

Cummins Filtration, Inc. manufactures filtration products and exhaust systems. The firm offers fluid analysis, coolants and chemicals, crankcase ventilation, fuel, lube, hydraulic, transmission, air, DEF and urea filtration, fleetguardFIT, The company was founded in 1958 and is headquartered in Nashville, TN.

Part of Mercedes-Benz Group AG, Western Star Trucks US, Inc. is a manufacturer of freight trucks. The company is based in Ladson, SC.

Stewart & Stevenson LLC designs, manufactures and markets oil and gas equipment. It offers products and services to a variety of industries such as agriculture, construction and industrial, marine, material handling, military and government, mining, oil and gas, on-highway and transportation, power generation, and rail. The company was founded in 1902 and is headquartered in Houston, TX.

Stewart & Stevenson Services, Inc. is a manufacturer and marketer of specialized equipment and provider of aftermarket parts and service to the oil and gas and other industries. The company's product offerings include equipment for well stimulation, well workover and service, drilling, coiled tubing, cementing, nitrogen pumping, power generation and electrical systems as well as engines, transmissions and material handling equipment. Stewart & Stevenson was founded in 1902 and is headquartered in Houston, TX.