Last Updated: December 23, 2011
Number of Parties: 45
| AMEREN ENERGY MARKETING COMPANY | 2011-12-15 |
| American Electric Power Service Corporation | 2011-12-20 |
| American Municipal Power, Inc. | 2011-12-21 |
| APN Starfirst, LP | 2011-12-23 |
| BARCLAYS BANK PLC | 2011-12-20 |
| BNP Paribas Energy Trading GP | 2011-12-20 |
| BP Corporation North America Inc. | 2011-12-15 |
| BP Energy Company | 2011-12-15 |
| Cargill Power Markets, LLC | 2011-12-13 |
| Citigroup Energy Inc. | 2011-12-16 |
| ConocoPhillips Company | 2011-12-13 |
| Constellation Energy Commodities Group, Inc. | 2011-12-13 |
| CREDIT SUISSE ENERGY LLC | 2011-12-21 |
| DB Energy Trading LLC | 2011-12-13 |
| Deutsche Bank AG | 2011-12-21 |
| Direct Energy Business, LLC | 2011-12-13 |
| Direct Energy Marketing Limited | 2011-12-13 |
| DTE ENERGY TRADING, INC. | 2011-12-19 |
| EDF Trading North America, LLC | 2011-12-14 |
| Energy America, LLC | 2011-12-13 |
| Enserco Energy Inc. | 2011-12-23 |
| EXELON GENERATION COMPANY, LLC | 2011-12-15 |
| Indiana Municipal Power Agency | 2011-12-22 |
| INTEGRYS ENERGY SERVICES, INC. | 2011-12-15 |
| INTERSTATE POWER AND LIGHT COMPANY | 2011-12-20 |
| IPR-GDF SUEZ Energy Marketing North America, Inc. | 2011-12-21 |
| J. ARON & COMPANY | 2011-12-21 |
| J.P. Morgan Ventures Energy Corporation | 2011-12-21 |
| JPMorgan Chase Bank, N.A. | 2011-12-21 |
| MACQUARIE ENERGY LLC | 2011-12-15 |
| MERRILL LYNCH COMMODITIES, INC. | 2011-12-15 |
| MidAmerican Energy Company | 2011-12-19 |
| Morgan Stanley Capital Group Inc. | 2011-12-13 |
| NEXTERA ENERGY POWER MARKETING, LLC | 2011-12-13 |
| NOBLE AMERICAS ENERGY SOLUTIONS LLC | 2011-12-16 |
| NOBLE AMERICAS GAS & POWER CORP. | 2011-12-20 |
| NORTHERN STATES POWER COMPANY, a Minnesota corporation | 2011-12-21 |
| PRAIRIE POWER, INC. | 2011-12-14 |
| SHELL ENERGY NORTH AMERICA (US), L.P. | 2011-12-22 |
| TENASKA POWER SERVICES CO. | 2011-12-21 |
| THE ENERGY AUTHORITY, INC. | 2011-12-22 |
| Union Electric Company d/b/a Ameren Missouri | 2011-12-15 |
| VITOL INC. | 2011-12-22 |
| WABASH VALLEY POWER ASSOCIATION, INC. | 2011-12-16 |
| WISCONSIN POWER AND LIGHT COMPANY | 2011-12-20 |