Trinseo PLC — Director's Dealing 2021

Mar 1, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Trinseo S.A. (TSE)
CIK: 0001519061
Period of Report: 2021-02-25

Reporting Person: Skeete Bernard M (VP, CAO and Global Controller)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-02-25	Ordinary Shares	M	415	$51.02	Acquired	7574	Direct
2021-02-25	Ordinary Shares	M	1844	$24.30	Acquired	9418	Direct
2021-02-25	Ordinary Shares	S	2259	$64.92	Disposed	7159	Direct
2021-02-26	Ordinary Shares	M	415	$51.02	Acquired	7574	Direct
2021-02-26	Ordinary Shares	S	415	$64.18	Disposed	7159	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-02-25	Option to Purchase Ordinary Shares	$51.02	M	415	Disposed	2028-02-26	Ordinary Shares (415)	Direct
2021-02-25	Option to Purchase Ordinary Shares	$24.30	M	1844	Disposed	2029-02-25	Ordinary Shares (1844)	Direct
2021-02-26	Option to Purchase Ordinary Shares	$51.02	M	415	Disposed	2028-02-26	Ordinary Shares (415)	Direct

Footnotes

F1: A portion of 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 $64.46 to 65.67. 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: The option vests in three equal annual installments beginning on the first anniversary of the grant date.