Giant Industries, Inc., headquartered in Scottsdale, Arizona, is a refiner and marketer of petroleum products operating crude oil refineries, pipelines, distribution terminals, and retail service stations in the Southwestern United States.
Kirby Corporation is the largest tank barge operator in the United States, transporting bulk liquid products throughout the Mississippi River System, Gulf Intracoastal Waterway, and U.S. coasts. It also provides distribution and services for diesel engines, transmissions, parts, and industrial equipment.
Petro-Diamond Inc. (PDI) is a wholly owned subsidiary of Mitsubishi Corporation.
Established in 1983, PDI's principal function is to expand Mitsubishi's role in petroleum product trading in the western hemisphere, primarily in the United States.
Repsol YPF is one of the 10 major privately owned international oil and gas companies engaged in exploration, production, refining, marketing and distribution of hydrocarbon and related products. Corporate headquarters offices are in Madrid, Spain. Regional offices are located worldwide.