Administaff Services, L.P. Aetna Foundation, Inc. AIG American Express Foundation Apache Corporation Baker Hughes Foundation Bank of America BP Foundation, Inc. Cemex Foundation, Inc. Chevron Employees Citgo Petroleum Corporation Colonial Group, Inc. Comerica Incorporated Computer Associates Computer Sciences Corporation ConocoPhillips Cooper Industries Dorflinger Foundation Duke Energy Foundation DuPont Powder Coatings EOG Resources ERS – Enhanced Revenue Solutions Equistar Chemicals, LP ExxonMobil Foundation FMC Tecnologies Inc Gap Giving Program GlaxoSmithKline Foundation Global Impact
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Global Santa Fe Corporate Services Harris and Eliza Kempner Fund Hewlett-Packard Company The Houston Exploration Company Houston Gold ING The J.P. Morgan Chase Foundation Jefferies & Company, Inc. The Lubrizol Corporation Lyondell Petrochemical Company Merrill Lynch Mobil Foundation, Inc. Murphy Oil USA, Inc. Newfield Exploration Company Occidental Permian Ltd. Oiltanking Houston, L.P. Pella Rolscreen Foundation Penn Virginia Corporation Pogo Producing Company Siemens Symantec Tenet Healthcare Foundation TurboCare Verizon Foundation Wachovia Foundation Washington Mutual Inc. Waste Management Service Center The Williams Companies, Inc.
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