• Alliance Resource Partners, L.P.
• Alpha Natural Resources, Inc.
• Arch Coal, Inc.
• BP
• Chevron
• ConocoPhillips
• ExxonMobil
• Flint Hill Resources
• General Electric
• Koch Industries
• Marathon Oil
• Motiva Enterprises
• Peabody Energy
• Patriot Coal
• Shell Oil Company
• Suncoke Energy
• Teco Energy
• Total Petrochemicals USA
• Valero Energy Corporation
