Stack most recently served as executive vice president and CEO, Aleris North America. With his appointment, Stack was also elected to the Aleris Board of Directors. Scott Graves, Aleris director and managing director and Head of Credit Strategies for Oaktree Capital Management, L.P. has been elected non-executive chairman of the Aleris Board. A fund managed by Oaktree is a majority shareholder of Aleris. Both appointments will take effect immediately.

Steve Demetriou, who has served as chairman and chief executive officer since the company's inception in 2004 has made the decision to leave Aleris to pursue a new leadership opportunity. Demetriou will work closely with Stack over the next few weeks to ensure a smooth transition.

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