LIN SANDRA BEACH 4
4 · Trinseo PLC · Filed May 14, 2026
Research Summary
AI-generated summary of this filing
Trinseo Director Sandra Lin Forfeits 42,484 RSUs
What Happened
- Sandra Lin, a director of Trinseo PLC (TSE), recorded an other disposition (code J) on May 12, 2026: the forfeiture of 42,484 restricted stock units (RSUs) previously granted on June 25, 2025. The award was unvested at forfeiture; no per-share price or cash proceeds are reported.
Key Details
- Transaction date: 2026-05-12 (filed with the SEC on 2026-05-14)
- Transaction type/code: Other disposition (J) — voluntary forfeiture of RSUs
- Shares/units affected: 42,484 RSUs forfeited
- Price/Proceeds: N/A — forfeiture, not an open-market sale
- Shares owned after transaction: Not specified in the filing
- Footnote: Confirms RSUs were unvested and forfeited (granted June 25, 2025)
Context
- A forfeiture cancels unvested equity awards and is not a purchase or market sale; it does not generate cash proceeds for the insider. Such forfeitures commonly occur under grant or employment-plan terms (e.g., termination, voluntary forfeiture), but the filing does not state a reason. This filing appears timely (reported two days after the transaction).
Insider Transaction Report
Form 4
Trinseo PLCTSE
LIN SANDRA BEACH
Director
Transactions
- Other
Ordinary Shares
[F1]2026-05-12−42,484→ 44,776 total
Footnotes (1)
- [F1]Reflects a voluntary forfeiture by the Reporting Person of restricted stock units ("RSUs") that were previously granted on June 25, 2025. At the time of forfeiture, the RSU award was not vested or settled, in full or in part.
Signature
/s/ Angelo Chaclas, Attorney-in-Fact|2026-05-14