Stasse David Phillip 4

What Happened
David Phillip Stasse, EVP and Chief Financial Officer of Trinseo PLC (TSE), had 10,366 shares withheld by the company to satisfy tax withholding obligations following the vesting of previously granted restricted stock units. The withheld shares were valued at $0.23 each for a total of $2,384. This is a routine tax-withholding disposition rather than an open-market sale or a purchase.

Key Details

• Transaction date: 2026-02-27; filing date (Form 4): 2026-03-03 (timely filed within SEC two-business-day rule).
• Action/type: F (shares withheld to pay tax liability on vested RSUs).
• Shares withheld/disposed: 10,366 at $0.23 each; total value reported $2,384.
• Shares owned after transaction: Not disclosed in the provided excerpt of the filing.
• Footnote: F1 — "Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units."

Context
Share withholding to cover taxes on vested RSUs is a common administrative action and does not indicate an active market sale or a directional trade by the insider. The transaction simply satisfies tax obligations associated with compensation vesting.