Amerada Hess Corporation - Exploration, production, refining and marketing.

Anonima Petroli Italiana S.p.a. (API) - Italian company active in supply, marketing and refining.

Ashland Inc. - Production and distribution of motor oil and car care products, and more.

Ashland Chemical Company - Manufacturer of chemical specialty and performance products.

BHP Hawaii - Petroleum refining and marketing.

Brunei Shell Marketing - Marketing Shell petroleum products.

Caltex Petroleum Corporation - Refines and markets petroleum.

Chevron Corporation - Petroleum exploration, development, refining and marketing.

Chevron Pipe Line Company - U.S. transportation company for crude oil and petroleum products.

China National Petroleum Corporation - Chinese co. operating refineries and processing plants.

CITGO Petroleum Corporation - Refining, marketing and transportation of petroleum products.

Coastal Corporation - Exploration and production, refining and marketing of petroleum products.

Energy Exchange International, Inc. - Downstream marketing programs.

Gibson Petroleum Company - Transports and markets crude oil in Canada and the U.S.

Global Petroleum Corp. - Refined petroleum products at wholesale prices.

Gulf Oil Limited Partnership - Wholesale refined petroleum products.

Hanwha Energy Co., Ltd. - Korean company active in exploration, refining and marketing.

Husky Oil Ltd. - Canadian co. involved in exploration and development of the petroleum industry.

Hyundai Oil - Korean oil refinery.

Imperial Oil Ltd. (Esso) - Trading group buys, sells, and trades petroleum products in bulk.

Interline Resources Corporation - Used oil refining, oil and gas and manufacturing, industrial construction, transportation and processing.

Irving Oil Limited - Canadian based refiner and marketer of crude products.

Koch Oil Company - Ownership services, crude oil accounting and purchasing.

Lagoven, S.A. - Exploration, production, refining and marketing crude oil and its by-products.

Lakehead Pipe Line Partners, L.P. - Owns shares in the world's longest liquid petroleum pipeline.

Leuendorff & Co. Mineralölhandel GmbH - Transportation and marketing of gas, oil and heating oil.

LG-Caltex Oil - Korean oil refining company.

LUKOIL - Russian oil company involved with production, refining and marketing.

Marathon Ashland Petroleum LLC - Large energy company with extensive refining, transportation and marketing systems.

Marathon Oil Company - Exploration, production, refining, pipelines and marketing.

Mobil Oil Australia Limited - Refiner and marketer of a broad range of petroleum products in Australia.

More Group, The - Company involved in oil and remarketing.

Neste Group - Finish integrated oil co. active in exploration, production, refining, sales etc.

Norsk Hydro ASA - Fully-integrated petroleum company.

OMV Aktiengesellschaft - Leading oil and gas co. in Central and Eastern Europe

Oy Falcon Chemicals Ab - Trades Russian and CIS origin materials to the Western markets.

Petroleum Traders Corporation - Wholesale bulk gasoline, heating oil, diesel fuel and kerosene.

Primary Corporation - Refines mixed petroleum products into useable oil products.

Purco's Petroleum Exchange - Sales and purchase of crude oil or refined petroleum products.

Qatar General Petroleum Corporation - Oil and gas industry in Qatar.

ROJATRANS bvba - Supplier for diesel, marine fuel and gasoline etc.

Slovene Petroleum Company plc (Petrol) - Slovenia's largest petroleum company.

Sun Company, Inc. - Large independent U.S. petroleum refiner-marketer.

Sunoco - Sarnia, Ontario, Canada refinery.

TOTAL - Major international oil and gas company.

UNOCAL 76 - UNOCAL refining and marketing division.

Valero Energy Company - Independent refiner and marketer in the U.S.

Western Petroleum Company - Petroleum marketing company in the upper midwest.

Western States Oil - Distribute gas, aviation and marine products, diesel products, lubricants, hydraulic and industrial oils, etc.

WINTERSHALL AG - German crude oil and natural gas marketing co.

Wolverine Pipeline Company - Liquid products pipeline for the midwest.