van Kessel Bregje 4

What Happened

• Bregje van Kessel, SVP, Corporate Finance & Investor Relations at Trinseo PLC, had a total of 7,298 shares withheld by the company to cover taxes following the vesting of previously granted restricted stock units (RSUs). The withholdings were reported as dispositions (code F) at $0.33 per share: 5,963 shares on 2026-02-21 (reported value $1,953) and 1,335 shares on 2026-02-22 (reported value $437). This was a tax-withholding event, not an open-market sale.

Key Details

• Transaction dates & prices: 2026-02-21 — 5,963 shares @ $0.33 (F); 2026-02-22 — 1,335 shares @ $0.33 (F).
• Total withheld: 7,298 shares for a combined reported value of $2,390.
• Shares owned after transaction: Not specified in the filing.
• Footnote: F1 — Shares were withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.
• Filing date: 2026-02-24 (no indication in the filing that this was a late submission).

Context

• Code F indicates company withholding of shares to satisfy tax obligations on vested RSUs — a routine administrative transaction that does not necessarily signal insider sentiment. This is not an open-market sale or a purchase and should be interpreted as a standard tax withholding following equity vesting.