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| Company Name | State or Other Jurisdiction of Incorporation or Organization | Name Under Business is Conducted |
| Century Aluminum of West Virginia, Inc. | Delaware | Century Aluminum of West Virginia, Inc. |
| Century Aluminum of South Carolina, Inc. | Delaware | Century Aluminum of South Carolina, Inc. |
| Century Aluminum Sebree, LLC | Delaware | Century Aluminum Sebree, LLC |
| Century Marketer LLC | Delaware | Century Marketer LLC |
| Century California, LLC | Delaware | Century California, LLC |
| Century Kentucky, Inc. | Delaware | Century Kentucky, Inc. |
| Century Bermuda I Limited | Bermuda | Century Bermuda I Limited |
| Century Aluminum Holdings, Inc. | Delaware | Century Aluminum Holdings, Inc. |
| Metalsco LLC | Georgia | Metalsco LLC |
| Skyliner LLC | Delaware | Skyliner LLC |
| NSA General Partnership | Kentucky | NSA GP |
| Century Aluminum of Kentucky General Partnership | Kentucky | Century Aluminum of Kentucky, GP |
| Hancock Aluminum LLC | Delaware | Hancock Aluminum, LLC |
| Century Aluminum of Kentucky LLC | Delaware | Century Aluminum of Kentucky LLC |
| Century Bermuda II Limited | Bermuda | Century Bermuda II Limited |
| Nordural Holdings, C.V. | Netherlands | Nordural Holdings, C.V. |
| Nordural U.S. LLC | Delaware | Nordural U.S. LLC |
| Nordural Helguvik ehf | Iceland | Nordural Helguvik ehf |
| Nordural ehf | Iceland | Nordural ehf. |
| Century Louisiana, Inc. | Delaware | Century Louisiana, Inc. |
| Century Aluminum Development LLC | Delaware | Century Aluminum Development LLC |
| Century Aluminum Congo, S.A. | Republic of Congo | Century Aluminum Congo, S.A. |
| Nordural Grundartangi ehf . | Iceland | Nordural Grundartangi ehf. |
| Century Aluminum Asia Holdings Limited | Hong Kong | Century Aluminum Asia Holdings Limited |
| Century Mincenco Holdings Limited | St. Lucia | Century Mincenco Holdings Limited |
| Century Aluminum Cooperatief U.A. | Netherlands | Century Aluminum Cooperatief U.A. |
| Century Aluminum Vlissingen B.V. | Netherlands | Century Aluminum Vlissingen B.V. |
| Century Anodes US, Inc. | California | Century Anodes US, Inc. |
| Mt. Holly Commerce Park, LLC | South Carolina | Mt. Holly Commerce Park, LLC |
