- AES Corporation
- Airtricity
- Calpine Corporation
- Cielo Wind Power
- Dynegy Power Corp.
- Formosa Plastics
- FPL Energy
- Gregory Power Partners
- International Power America
- Navasota Energy Management
- NRG Texas
- PSEG Texgen I
- Sid Richardson Carbon and Energy
- Signal Hill Power
- Suez Energy Marketing NA
- Sweetwater Wind 2
- Topaz Power Group LLC
- Wolf Hollow I
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- Cobisa Corporation
- Guadalupe-Blanco River Authority
- Tenaska Energy
- Texas Independent Energy
- Texas Petrochemicals
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