Arcadium Lithium plc announced that on December 15, 2023, the current board of directors of Arcadium (the ?Current Arcadium Board?) appointed each of the members of the New Arcadium Board as directors of Arcadium effective upon the Effective Time and subject to the closing of the transactions contemplated by the Transaction Agreement (the ?Closing?). In connection therewith, the Current Arcadium Board also appointed the members of the New Arcadium Board to Arcadium?s Audit Committee, Compensation Committee, Nominating and Corporate Governance Committee and Sustainability Committee as: In Audit Committee Leanne Heywood (Chair), Fernando Oris de Roa, Michael F. Barry, Steven T. Merkt. In Compensation Committee John Turner (Chair), Fernando Oris de Roa, Pablo Marcet, Michael F. Barry.

In Nominating and Corporate Governance Committee Steven T. Merkt (Chair), Robert C. Pallash, Christina Lampe-Önnerud, Peter Coleman, Florencia Heredia, Alan Fitzpatrick. In Sustainability Committee: Robert C. Pallash (Chair), Christina Lampe-Önnerud, Pablo Marcet, Alan Fitzpatrick, Florencia Heredia and Leanne Heywood. Each of the members of the Current Arcadium Board, Gilberto Antoniazzi, Juan Carlos Cruz Chellew and Donal Flynn, submitted resignations from the board of directors of Arcadium effective upon the Effective Time and subject to the Closing.

On December 15, 2023, the Current Arcadium Board appointed Paul W. Graves as President, Gilberto Antoniazzi as Treasurer, Sara Ponessa as General Counsel and Secretary, and Ronald B. Stark as Chief Accounting Officer, in each case effective upon the Effective Time and subject to the Closing.