ExxonMobil - Refining & Chemicals

Coastal Corporation

Motiva

Equiva

Gladieux Refining and Marketing Inc.

PetroVietnam

PetroVietnam Fertilizer and Chemical Company

Williams Companies, Inc.

ConocoPhillips

Zarubezhneft JSC

Giant Industries

Saudi Aramco

Sharjah Oil Refining Company

Texaco

Shell

State of Hawaii

Panama Ministry of Trade and Industry