Trinseo PLC — Director's Dealing 2026

Mar 3, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Trinseo PLC (TSE)
CIK: 0001519061
Period of Report: 2026-02-27

Reporting Person: Cooney Paula M. (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-27	Ordinary Shares	F	7670	$.23	Disposed	118318	Direct

Footnotes

F1: Shares withheld by the Company to pay taxes due following the vesting of restricted stock units.