| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Hendriks Han | SVP, CHIEF TECHNOLOGY OFFICER | C/O TRINSEO PLC, 440 EAST SWEDESFORD ROAD, SUITE 301, WAYNE | /s/ Angelo Chaclas, Attorney-in-Fact | 24 Feb 2026 | 0001946359 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | TSE | Ordinary Shares | Tax liability | $2,074 | -6,331 | -7.1% | $0.3276 | 83,360 | 21 Feb 2026 | Direct | F1 |
| transaction | TSE | Ordinary Shares | Tax liability | $751 | -2,291 | -2.7% | $0.3276 | 81,069 | 22 Feb 2026 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Shares withheld by the Company to pay taxes due following the vesting of restricted stock units. |