0000949157-07-000008 Sample Contracts

SUPPLEMENTAL INDENTURE No. 5 dated as of December 21, 2006 among CENTURY ALUMINUM COMPANY, as Issuer CENTURY CALIFORNIA LLC, as a Guarantor and WILMINGTON TRUST COMPANY, as Trustee

Supplemental Indenture • March 1st, 2007 • Century Aluminum Co • Primary production of aluminum • New York

• Contract Type
  Supplemental Indenture
• Filed
  March 1st, 2007
• Company
  Century Aluminum Co
• Industry
  Primary production of aluminum
• Jurisdiction
  New York

THIS SUPPLEMENTAL INDENTURE NO. 5 (this “Supplemental Indenture”), entered into as of December 21, 2006, is among Century Aluminum Company, a corporation duly organized under the laws of the State of Delaware (the “Company”), Century California LLC, a limited liability organized under the laws of Delaware, as a Guarantor (the “Undersigned”) and Wilmington Trust Company, as trustee (the “Trustee”).

SUPPLEMENTAL INDENTURE No. 3 dated as of December 21, 2006 among CENTURY ALUMINUM COMPANY, as Issuer CENTURY CALIFORNIA LLC as a Guarantor and WILMINGTON TRUST COMPANY, as Trustee 71/2% SENIOR NOTES DUE 2014

Supplemental Indenture • March 1st, 2007 • Century Aluminum Co • Primary production of aluminum • New York

• Contract Type
  Supplemental Indenture
• Filed
  March 1st, 2007
• Company
  Century Aluminum Co
• Industry
  Primary production of aluminum
• Jurisdiction
  New York

THIS SUPPLEMENTAL INDENTURE NO. 3 (this “Supplemental Indenture”), entered into as of December 21, 2006, among Century Aluminum Company, a Delaware corporation (the “Company”), Century California LLC, a Delaware limited liability company, as a Guarantor (the “Undersigned”) and Wilmington Trust Company, as trustee (the “Trustee”).