Chaclas Angelo N. 4

What Happened
Angelo N. Chaclas, Trinseo PLC SVP, CLO, CCO & Corporate Secretary, had 7,607 shares withheld by the company to satisfy tax withholding obligations after restricted stock units vested. The withholding was recorded as a disposition at $0.23 per share, totaling $1,750. This is a tax-withholding action (code F), not an open-market sale.

Key Details

• Transaction date: 2026-02-27; Form 4 filed: 2026-03-03 (timely — within two business days).
• Shares withheld/disposed: 7,607 at $0.23 per share — total value $1,750.
• Transaction code: F (payment of exercise price or tax liability).
• Footnote: Shares were withheld by the company to pay taxes due following RSU vesting (F1).
• Shares owned after transaction: not specified in the filing.

Context
This was a routine tax-withholding event tied to RSU vesting (a cashless mechanism where the company retains shares to cover required taxes) and does not indicate an active decision to liquidate holdings on the open market. Such withholding transactions are common for executives and are generally considered neutral from an insider-sentiment perspective.