Including the exercise of the over-allotment option, the net proceeds from the offering, after deducting underwriting discounts and commissions, are expected to be approximately $442 million.

As previously announced, the Company expects to use the net proceeds of the offering to pay a portion of the deferred portion of the cash payment associated with the termination of the financial sales contracts with Glencore.

Credit Suisse Securities (USA) LLC and Morgan Stanley & Co. Incorporated are acting as underwriters for the offering.

This press release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of these securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction.

Century Aluminum Company owns primary aluminum capacity in the United States and Iceland, as well as an ownership interest in alumina and bauxite assets in the United States and Jamaica. Century's corporate offices are located in Monterey, California.

Cautionary Statement

This press release may contain "forward-looking statements" within the meaning of U.S. federal securities laws. The company has based its forward-looking statements on current expectations and projections about the future; however, these statements are subject to risks, uncertainties and assumptions, any of which could cause the company's actual results to differ materially from those expressed in its forward-looking statements. More information about these risks, uncertainties and assumptions can be found in the risk factors and forward-looking statements cautionary language contained in the company's Annual Report on Form 10-K and in other filings made with the Securities and Exchange Commission. The company does not undertake, and specifically disclaims, any obligation to revise any forward-looking statements to reflect the occurrence of anticipated or unanticipated events or circumstances after the date such forward-looking statements are made.

Certified Advisors for the First North market of the OMX Nordic Exchange Iceland hf. for Global Depositary Receipts in Iceland:

Helga Gunnarsdottir, Director-Corporate Finance, Landsbanki Islands hf.

Olafur Finsen, Senior Legal Advisor-Corporate Finance, Landsbanki Islands hf.

We have filed a registration statement (including a prospectus) with the SEC for the offering to which this communication relates. Before you invest, you should read the prospectus in that registration statement and other documents we have filed with the SEC for more complete information about us and this offering. You may get these documents for free by visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, we, any underwriter or any dealer participating in the offering will arrange to send you the prospectus if you request it by calling Credit Suisse Securities (USA) LLC toll free at (800) 221-1037 or Morgan Stanley & Co. Incorporated toll free at (866) 718-1649 or by sending a request via email to Morgan Stanley & Co. Incorporated at prospectus@morganstanley.com.