American Airlines, Inc. Axalto S.A. CenterPoint Energy, Inc. Christus Healthcare Encore Bank Equatorial Mining Ltd. General Electric Co. GeoMet, Inc. HCA Healthcare Hydril Co. Levi Strauss & Co. Local Gov't Investment Coop. M-I Swaco, Inc. Peregrine Systems, Inc. Protective Life Insurance Qwest Communications Reliant Energy Smith International, Inc. Southwest Airlines Co. Technip USA The Hartford The Methodist Hospital The Williams Companies U.S. Chamber of Commerce