Trinseo PLC — Director's Dealing 2025

Jun 27, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Trinseo PLC (TSE)
CIK: 0001519061
Period of Report: 2025-06-25

Reporting Person: COTE JEFFREY J (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-06-25	Ordinary Shares	A	42484	—	Acquired	88183	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Ordinary Shares	170503	Indirect

Footnotes

F1: Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date.

F2: Represents shares held by an irrevocable indenture trust having a disinterested trustee for the benefit of the reporting person and children (the "Cote 2019 Irrevocable Indenture Trust").