Century Aluminum USW Ratifies New Contract at Hawesville, Kentucky Smelter

Five-Year Agreement Effective Through April 1, 2020


CHICAGO, IL--(Marketwired - June 12, 2015) - Century Aluminum of Kentucky General Partnership (the "Company"), a subsidiary of Century Aluminum Company (NASDAQ: CENX) ("Century"), announced today that a new, five-year collective bargaining agreement was ratified by the United Steelworkers Local 9423 on June 11, 2015 for the Company's Hawesville, Kentucky smelter. The new contract is effective today through April 1, 2020.

"We welcome this positive development for the smelter, its entire workforce and the community," commented Mike Bless, CEO and John Hoerner, SVP North American Operations. "Century's employees have always been and will always be a critical part of our success. We now look forward to working with everyone who shares our commitment to make the Hawesville plant the safest and most productive business it can be."

Workers will return to their regular shifts beginning Monday, June 15 at 7 a.m.

About Century Aluminum
Century Aluminum Company owns primary aluminum capacity in the United States and Iceland. Century's corporate offices are located in Chicago, IL.

Visit www.centuryaluminum.com for more information.

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.

Cautionary Statement
This press release contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, which are subject to the "safe harbor" created by section 27A of the Securities Act of 1933, as amended (the "Securities Act"), and section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). 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. These forward-looking statements may be identified by the words "believe," "expect," "anticipate," "intend," "plan," "estimate," "forecast" or words of similar meaning, or future or conditional verbs such as "will," "would," "should," "could," "might," or "may." Forward-looking statements in this press release include, without limitation, statements with respect to the ultimate effects of the new collective bargaining agreement with the labor union at our Hawesville, Kentucky smelter. More information about the risks, uncertainties and assumptions affecting the Company 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.


Century Aluminum Contacts:
Kenny Barkley (media)
270.521.7424

Peter Trpkovski (investors)
312.696.3112