Trinseo PLC — Director's Dealing 2021

Nov 16, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Trinseo PLC (TSE)
CIK: 0001519061
Period of Report: 2021-11-12

Reporting Person: HEEZEN ALICE (SVP - Human Resources)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-11-12	Ordinary Shares	M	6443	$24.30	Acquired	18262	Direct
2021-11-12	Ordinary Shares	M	5363	$51.02	Acquired	23625	Direct
2021-11-12	Ordinary Shares	S	11806	$57.75	Disposed	11819	Direct
2021-11-12	Ordinary Shares	S	1738	$57.94	Disposed	10081	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-11-12	Option to Purchase Ordinary Shares	$24.30	M	6443	Disposed	2029-02-25	Ordinary Shares (6443)	Direct
2021-11-12	Option to Purchase Ordinary Shares	$51.02	M	5363	Disposed	2028-02-26	Ordinary Shares (5363)	Direct

Footnotes

F1: A portion of the proceeds from the sale were used to pay the exercise price of stock options pursuant to a broker-assisted cashless exercise, and applicable withholding taxes.

F2: Price reflects the weighted average sale price for the sale transactions made on the date reported above. Sale prices ranged from $57.75 to $57.79. 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 or sold at each separate price.

F3: Price reflects the weighted average sale price for the sale transactions made on the date reported above. Sale prices ranged from $57.93 to $58.00. 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 or sold at each separate price.

F4: Options will vest in three equal annual installments beginning on the first anniversary of the grant date.