0001299933-09-002197 Sample Contracts

TWENTIETH SUPPLEMENTAL INDENTURE FOR ADDITIONAL SUBSIDIARY GUARANTEES

Twentieth Supplemental Indenture • May 14th, 2009 • NRG Energy, Inc. • Electric services • New York

• Contract Type
  Twentieth Supplemental Indenture
• Filed
  May 14th, 2009
• Company
  NRG Energy, Inc.
• Industry
  Electric services
• Jurisdiction
  New York

Twentieth Supplemental Indenture (this “Supplemental Indenture for Additional Guarantees”), dated as of May 8, 2009, among Reliant Energy Services Texas, LLC, Reliant Energy Texas Retail LLC, NRG Texas C&I Supply LLC and Langford Wind Power, LLC (each a “Guaranteeing Subsidiary” and together the “Guaranteeing Subsidiaries”), each an indirect subsidiary of NRG Energy, Inc., a Delaware corporation (the “Company”), the Company, the existing guarantors set forth on the signature page hereto (the “Existing Guarantors”) and Law Debenture Trust Company of New York, as trustee under the indentures referred to below (the “Trustee”).

TWENTY-FIRST SUPPLEMENTAL INDENTURE ADDITIONAL SUBSIDIARY GUARANTEES

Twenty-First Supplemental • May 14th, 2009 • NRG Energy, Inc. • Electric services

• Contract Type
  Twenty-First Supplemental
• Filed
  May 14th, 2009
• Company
  NRG Energy, Inc.
• Industry
  Electric services

Twenty-First Supplemental Indenture (this “Supplemental Indenture for Additional Guarantees”), dated as of May 8, 2009, among Reliant Energy Services Texas, LLC, Reliant Energy Texas Retail LLC, NRG Texas C&I Supply LLC and Langford Wind Power, LLC (each a “Guaranteeing Subsidiary” and together the “Guaranteeing Subsidiaries”), each an indirect subsidiary of NRG Energy, Inc. (or its permitted successor), a Delaware corporation (the “Company”), the Company, the existing guarantors set forth on the signature page hereto (the “Existing Guarantors") and Law Debenture Trust Company of New York, as trustee under the indentures referred to below (the “Trustee”).

NINETEENTH SUPPLEMENTAL INDENTURE FOR ADDITIONAL SUBSIDIARY GUARANTEES

Nineteenth Supplemental Indenture • May 14th, 2009 • NRG Energy, Inc. • Electric services • New York

• Contract Type
  Nineteenth Supplemental Indenture
• Filed
  May 14th, 2009
• Company
  NRG Energy, Inc.
• Industry
  Electric services
• Jurisdiction
  New York

NINETEENTH Supplemental Indenture (this “Supplemental Indenture for Additional Guarantees”), dated as of May 8, 2009, among Reliant Energy Services Texas, LLC, Reliant Energy Texas Retail LLC, NRG Texas C&I Supply LLC and Langford Wind Power, LLC (each a “Guaranteeing Subsidiary” and together the “Guaranteeing Subsidiaries”), each an indirect subsidiary of NRG Energy, Inc., a Delaware corporation (the “Company”), the Company, the Existing Guarantors set forth on the signature page hereto (the “Existing Guarantors”) and Law Debenture Trust Company of New York, as trustee under the indentures referred to below (the “Trustee”).