FARRELL MATTHEW 4

What Happened Matthew Farrell, a director of Trinseo PLC (TSE), recorded a disposition on May 12, 2026: a voluntary forfeiture of 42,484 restricted stock units (RSUs) that were granted on June 25, 2025. The forfeited RSUs were unvested at the time of forfeiture. No purchase price, sale price, or cash proceeds are reported for this transaction.

Key Details

• Transaction date: May 12, 2026 (reported on Form 4 filed May 14, 2026).
• Transaction code: J (other acquisition or disposition); 42,484 RSUs disposed; price listed as N/A.
• Footnote: The RSUs were voluntarily forfeited and were not vested or settled, in full or in part, at the time of forfeiture.
• Shares owned after transaction: not specified in the summary information provided.
• Timeliness: Form 4 was filed two days after the transaction date, which is within the usual two-business-day reporting window.

Context A forfeiture of unvested RSUs is an administrative cancellation of an equity award and is not the same as an open-market sale or purchase. It typically involves no cash proceeds and does not directly indicate the insider's view on the company stock.