Century Aluminum Company - Company Announcement

Century Announces Continued Operations of Its Sebree, KY Smelter

Lower Market Power Prices to Allow the Plant to Continue Despite Illegal
Chinese Trade Behavior 

CHICAGO, IL--(Marketwired - December 17, 2015) - Century Aluminum Sebree LLC, a
wholly-owned subsidiary of Century Aluminum Company (NASDAQ: CENX), today
announced that it would continue to operate all of its production lines at its
Sebree, Ky. smelter. The Company had previously announced plans to curtail one
of its three production lines by December 31, 2015. Sebree's continued
operation will help save hundreds of jobs in western Kentucky. 

"We are very happy to announce that Sebree will continue to operate," commented
Michael Bless, President and CEO. "Sebree's ability to access low-cost market
power gives it a competitive advantage over many of the remaining U.S.
smelters. Past hard work and cooperation among Kentucky state legislators and
regulators, the local utility, and the Company to create this access will now
allow the plant to continue to operate despite continued illegal Chinese trade
behavior." 

There are approximately 525 employees at Sebree. At full capacity, the plant
annually produces approximately 210,000 metric tonnes of aluminum. 

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.