Paula M. Cooney - 22 Feb 2023 Form 4 Insider Report for Trinseo PLC (TSE)

Role: SVP & CHRO
Signature: /s/ Angelo Chaclas, attorney-in-fact
Issuer symbol: TSE
Transactions as of: 22 Feb 2023
Net transactions value: $0
Form type: 4
Filing time: 24 Feb 2023, 16:50:40 UTC
Previous filing: 12 Dec 2022
Next filing: 27 Feb 2024
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TSE	Ordinary Shares	Award	$0	+7,677	+73%	$0.000000	18,154	22 Feb 2023	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	TSE	Option to Purchase Ordinary Shares	Award	$0	+17,022		$0.000000	17,022	22 Feb 2023	Ordinary Shares	17,022	$24.08	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents ordinary shares issuable pursuant to RSU award that will vest in full on the third anniversary of the grant.
F2	The option vests in three equal annual installments beginning on the first anniversary of the grant date.