Prior Participants

Avista Energy, Inc.

Avista Corporation

BP Energy Company

Cargill Power Markets, LLC

Citigroup Energy, Inc.

Conoco Phillips Company

Constellation Energy Commodities Group, Inc.

Coral Power, LLC

Credit Suisse Energy, LLC

Epcor Merchant and Capital (U.S.) Inc.

Highland Energy LLC

Iberdrola Renewables, Inc.

J.P. Morgan Ventures Energy Corp.

Lehman Brothers Commodity Services Inc. Corporation

Macquarie Cook Power Inc.

Pacificorp

Portland General Electric Company

Powerex Corp.

PPL Energy Plus, LLC

PPM Energy, Inc.

Public Utility District No. 1 of Chelan County

Puget Sound Energy, Inc.

Sempra Energy Trading LLC

Shell Energy North America (IS), L.P.

TransAlta Energy Marketing Inc.