Johanna Frisch - Sep 30, 2025 Form 4 Insider Report for Trinseo PLC (TSE)

Signature
/s/ Angelo Chaclas, Attorney-in-Fact
Stock symbol
TSE
Transactions as of
Sep 30, 2025
Transactions value $
-$5,156
Form type
4
Date filed
10/2/2025, 04:05 PM
Previous filing
Mar 14, 2025

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Frisch Johanna VP AND TREASURER C/O TRINSEO PLC, 440 EAST SWEDESFORD ROAD, SUITE 301, WAYNE /s/ Angelo Chaclas, Attorney-in-Fact 2025-10-02 0001904241

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TSE Ordinary Shares Tax liability -$5.16K -2.19K -12.13% $2.35 15.9K Sep 30, 2025 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Johanna Frisch is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.

Explanation of Responses:

Id Content
F1 Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.