Exhibit 31.5
CHIEF EXECUTIVE OFFICER CERTIFICATION
I, Paul W. Graves, certify that:
| 1. | I have reviewed this Annual Report on Form 10-K/A of Arcadium Lithium plc; and |
| 2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. |
Date: April 29, 2024
| /s/ Paul W. Graves | ||
| Paul W. Graves | ||
| President and Chief Executive Officer |