Century Aluminum Company - Company Announcement

Century Aluminum Announces Agreement to Acquire Sebree, KY Smelter

MONTEREY, CA--(Marketwired - April 29, 2013) - Century Aluminum Company
(NASDAQ: CENX) announced today that its wholly owned subsidiary has entered
into a definitive agreement to acquire substantially all of the assets of the
Sebree aluminum smelter from a subsidiary of Rio Tinto Alcan, Inc. Sebree,
located in Henderson County, Kentucky, employs over 500 men and women and has
an annual production capacity of 205,000 metric tons of primary aluminum. "We are well acquainted with the Sebree smelter and its excellent management
team and talented group of employees," commented Michael Bless, President and
CEO. "We believe that, with these facilities under common ownership, we will
derive real benefits in better serving customers and through improving both
operations with the sharing of best practices in safety, technical and
operational practices and procedures. My colleagues and I are anxious to
welcome Sebree's men and women into the Century group of companies.""We believe Sebree, like Hawesville, is globally competitive in every area
other than the cost of power," continued Mr. Bless. "Maintaining operations at
these plants, and the thousands of direct and indirect jobs they provide and
support, is critical for the entire western Kentucky community. Gaining access
to competitive energy is a crucial for the continued viability of these plants,
and we hope that the tentative agreement we have reached for Hawesville will be
the first step towards obtaining market priced power."

Pursuant to the terms of the agreement, Century will acquire the smelter for
$61 million in cash (after $4 million in purchase price deductions) and will
receive $71 million in working capital, subject to customary adjustments. As
part of the transaction, RTA will retain all historical environmental
liabilities of the Sebree smelter and has agreed to fully fund the pension plan
being assumed by Century's subsidiary at closing. 

The transaction is subject to certain closing conditions, including the consent
of Kenergy Corp. to the assignment of the smelter's existing power contract,
which will terminate on January 31, 2014. 

Century Aluminum Company owns primary aluminum capacity in the United States
and Iceland. Century's corporate offices are located in Monterey, Calif. More
information can be found at www.centuryaluminum.com. 

Cautionary Statement

This press release contains "forward-looking statements" within the meaning of
the Private Securities Litigation Reform Act of 1995. Forward-looking
statements are statements about future, not past, events and involve certain
important risks and uncertainties, any of which could cause our actual results
to differ materially from those expressed in our forward-looking statements.
Such risks and uncertainties may include, without limitation, further declines
in aluminum prices or increases in our operating costs; worsening of global
financial and economic conditions; our ability to successfully obtain long-term
competitive power arrangements for the Hawesville and Sebree plants; and our
ability to obtain the necessary consents and satisfy the necessary conditions
to complete the acquisition of the Sebree plant. Forward-looking statements in
this press release include statements regarding our ability to complete the
acquisition of the Sebree plant, derive benefits from the common ownership of
the Sebree and Hawesville plants and obtain competitive power contracts for the
Hawesville and Sebree plants. More information about these risks, uncertainties
and assumptions can be found in the risk factors and forward-looking statements
cautionary language contained in our Annual Report on Form 10-K and in other
filings made with the Securities and Exchange Commission. We do not undertake,
and specifically disclaim, any obligation to revise any forward-looking
statements to reflect the occurrence of future events or circumstances. 

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

Atli B. Gudmundsson, Senior Manager -- Corporate Finance, Landsbankinn hf.
Steingrimur Helgason, Director -- Corporate Finance, Landsbankinn hf.


Century Aluminum Contacts:

Clair Nichols (media)
502-649-8956

Shelly Harrison (investors)
831-642-9357