Trinseo PLC — Director's Dealing 2025

Aug 14, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Trinseo PLC (TSE)
CIK: 0001519061
Period of Report: 2025-08-12

Reporting Person: FARRELL MATTHEW (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-08-12	Ordinary Shares	P	25000	$2.29	Acquired	175225	Direct
2025-08-13	Ordinary Shares	P	26391	$2.45	Acquired	201616	Direct
2025-08-14	Ordinary Shares	P	48609	$2.43	Acquired	250225	Direct

Footnotes

F1: Price reflects the weighted average purchase price for the purchase transaction made on the date reported above. Purchase prices ranged from $2.26 to $2.32. The reporting person will provide, upon request by the Staff, the Company, or a security holder of the Company, full information regarding the number of shares purchased at each separate price.

F2: Price reflects the weighted average purchase price for the purchase transaction made on the date reported above. Purchase prices ranged from $2.36 to $2.50. The reporting person will provide, upon request by the Staff, the Company, or a security holder of the Company, full information regarding the number of shares purchased at each separate price.

F3: Price reflects the weighted average purchase price for the purchase transaction made on the date reported above. Purchase prices ranged from $2.38 to $2.46. The reporting person will provide, upon request by the Staff, the Company, or a security holder of the Company, full information regarding the number of shares purchased at each separate price