On February 8, 2021, John Hoerner, Executive Vice President, North American Operations of Century Aluminum Company (the "Company") informed the Company of his decision to retire from the Company effective October 31, 2021. In connection with his retirement announcement, Mr. Hoerner has stepped down from his position as Executive Vice President, North American Operations, effective immediately, but will remain with the Company through his retirement date to assist with the transition. The Company also announced that Gunnar Gudlaugsson, who is currently serving as Vice President, European Operations of the Company and Managing Director of the Company's wholly-owned subsidiary, Nordural Grundartangi ehf., will be promoted to the role of Executive Vice President, Global Operations, effective immediately. Century Aluminum Company announced that it has named Gunnar Gudlaugsson as Executive Vice President, Global Operations. Since joining Century in 2008, Mr. Gudlaugsson has served in a variety of operational roles of increasing responsibility, including most recently as Vice President, European Operations and Managing Director of Norðurál. Century also announced that John Hoerner, Century’s Executive Vice President, North American Operations, will retire following ten years of distinguished service to the Company. Mr. Hoerner will remain with Century in an advisory role through October 2021 to assist with the transition.