- Equilon Enterprises, L.L.C.
- Chevron Corp.
- Shell Oil Co.
- Caljet, L.L.C.
- Seaport Petroleum Corp.
- Atlantic Richfield Co. (ARCO)
- Hartson-Kennedy, Inc.
- Unocal Corp.
- Phoenix Asphalt (Chevron)
- Krystal Energy, Inc.
- Zila, Inc.
- Inter-Cal Corp.
- Union Distributing, Inc.
- Laidlaw Environmental Services, Southwest, Inc.
- Western Energy, Inc.
- National Petroleum Marketing, Inc.
- Mobil Corp.
- Sante Fe Pacific Pipeline Partners, L.P.
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- Shell Oil Products, U.S.
- Matrix Service, Inc.
- William Energy Services
- Pro Petroleum, Inc.
- Sun Energy Propane, Inc.
- Bioleum, Inc.
- Pinnacle Mining Corp.
- Dyn Air Fuels, Inc.
- Intermountain Refining, Inc.
- Arizona Refining, Inc.
- Asfaltos de Mexico, S.A.
- San Luis Tank, Inc.
- North American Palladium, Inc.
- Magma Copper Co.
- Pinnacle Natural Gas Corp.
- North Star Exploriation & Development, Inc.
- Summit Research, Inc.
- University of Utah Technology Transfer
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