| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Gudlaugsson Gunnar | EVP - Global Operations | C/O CENTURY ALUMINUM COMPANY, 1 S. WACKER DR., SUITE 1000, CHICAGO | /s/ Paul Sharobeem, as attorney in fact for Gunnar Gudlaugsson | 27 Feb 2026 | 0001846594 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | CENX | Common Stock | Sale | $2,326,300 | -43,000 | -24% | $54.10 | 136,393 | 25 Feb 2026 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Includes unvested RSUs granted to the Reporting Person under the Issuer's Long-Term Incentive Plans. |