| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Aboud Matt | SVP, Strategy & Business Dev't | C/O CENTURY ALUMINUM COMPANY, 1 S. WACKER DRIVE, SUITE 1000, CHICAGO | /s/ Paul Sharobeem, attorney-in-fact for Matt Aboud | 14 Aug 2025 | 0001863408 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | CENX | Common Stock | Sale | $279,868 | -12,027 | -16% | $23.27 | 62,589 | 12 Aug 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Includes unvested RSUs granted to the Reporting Person under the Issuer's Long-Term Incentive Plans. |