Key facts
- This page summarizes Mark E. Tomkins's Form 4 filing for Trinseo PLC (TSE).
- 1 reported transaction and 0 derivative rows are listed below.
- Accepted by SEC: 24 Jun 2025, 16:15.
Mark E. Tomkins - 21 Jun 2025 Form 4 Insider Report for Trinseo PLC (TSE)
- Reporting relationship
- Director
- Issuer ticker
- TSE
- Reported as of
- 21 Jun 2025
- Net transaction value
- -$37,692
- SEC form
- 4
- Accepted by SEC
- 24 Jun 2025, 16:15:24 UTC
- Prior SEC filing
- 14 Aug 2024
- Source filing
- View source filing
- Reporting owner signature
- /s/ Angelo Chaclas, Attorney-in-Fact
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Mark E. Tomkins filed Form 4 for Trinseo PLC (TSE) on 24 Jun 2025.
Change
- Previous filing in this sequence was filed on 14 Aug 2024.
- Current net transaction value: -$37,692.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001204576
Primary reporting owner
TOMKINS MARK E
- Relationship
- Director
- Address
- C/O TRINSEO PLC, 440 EAST SWEDESFORD ROAD, SUITE 301, WAYNE
- Signature
- /s/ Angelo Chaclas, Attorney-in-Fact
- Signature date
- 24 Jun 2025
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
TSE
transaction
Ordinary Shares
Tax liability
- Transaction value
- $37,692
- Shares
- -10,105
- Change %
- -22%
- Price
- $3.73
- Shares after
- 36,619
- Date
- 21 Jun 2025
- Ownership
- Direct
- Footnotes
- F1
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 1 footnote
Footnote F1
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.