Roundtable Level

• Alstom Power
• American Petroleum Institute
• Arch Coal, Inc.
• Black Hills Corporation
• Burlington Northern Santa Fe
• Deseret Power
• Devon Energy Corporation
• FMC Corporation
• Harrison Western Corporation
• Intermountain Rural Electric Association
• Molycorp Minerals
• Peabody Energy
• Questar Market Resources
• Raytheon Corporation
• Rio Tinto America
• Salt River Project
• Shell Exploration & Production Company
• Tri-State G&T Association, Inc.

Corporate Level

• Bill Barrett Corporation
• CH2M Hill
• EOG Resources, Inc.
• Great Northern Properties LP
• MDU Resources Group, Inc.
• Newmont Mining Corporation
• Pinnacle West Capital Corporation

Shareholder Level

• Anglogold Ashanti North America, Inc
• Composite Technology Corporation
• Delta Petroleum
• Denbury Resources, Inc.
• Edison Electric Institute
• Nolte Associates
• Precise Power
• PRECorp
• River Basin Energy
• Simbol Mining
• Tri-West Health Care Alliance
• Trans-Elect, Inc.
• Western Fuels Association, Inc.

Associate Level

• Colorado River Energy Distributors Association
• Colorado Rural Electric Association
• Transition Power Development
• Wyoming Infrastructure Authority

Scholarship Level

• Northwest Mining Association
• Montana Association of Oil and Gas and Coal Counties, Inc.
• Northern Alliance of Independent Producers