| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Brifo Victoria | Director | C/O TRINSEO PLC, 440 EAST SWEDESFORD ROAD, SUITE 301, WAYNE | /s/ Angelo Chaclas, Attorney-in-Fact | 24 Jun 2025 | 0001867705 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | TSE | Ordinary Shares | Tax liability | $35,718 | -9,576 | -19% | $3.73 | 40,741 | 21 Jun 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |