Trinseo Plc SEC Filings

SEC Form 4 snapshot – Trinseo PLC (TSE): Director Henri Steinmetz reported a code “F” transaction on 06/21/2025, indicating shares were withheld by the company to satisfy tax obligations arising from the vesting of restricted stock units.

Key figures

• Shares disposed: 20,001 ordinary shares
• Implied price: $3.73 per share
• Remaining direct holdings: 53,453 shares
• No derivative securities were bought or sold

Because code “F” transactions are administrative rather than discretionary sales, the filing is typically viewed as neutral to sentiment, though it does reduce the director’s stake by roughly 27% and marginally increases the public float.

Insider transaction overview: Trinseo PLC (ticker: TSE) has filed a Form 4 reporting a routine tax-related share disposition by director Sandra Beach Lin.

• Transaction date: 21 June 2025
• Transaction code: F – shares withheld by the company to satisfy tax obligations upon vesting of previously granted restricted stock units
• Shares disposed: 10,310 ordinary shares
• Price: US $3.73 per share (as stated in the filing)
• Post-transaction ownership: 44,776 ordinary shares held directly

No derivative securities were acquired or disposed of, and no other insiders were included in the filing. Because the sale was coded “F,” it is classified as a non-discretionary transaction strictly for tax-withholding purposes, carrying limited signalling value regarding the insider’s outlook. The filing does, however, confirm Ms. Lin’s continuing equity stake of nearly forty-five thousand shares, aligning her interests with shareholders.

Form 4 snapshot: On 06/24/2025 Trinseo PLC (TSE) reported a 06/21/2025 insider transaction by director Matthew Farrell.

Key details

• Transaction code F – 9,576 ordinary shares automatically withheld to cover taxes at an implied $3.73 per share following the vesting of restricted stock units.
• Post-transaction holding – 107,741 directly owned shares; no derivative activity or indirect holdings reported.
• The 9,576 shares represent approximately 8% of the director’s pre-withholding position (117,317 shares) and did not involve an open-market decision or cash proceeds.

Interpretation – Code F events are routine, administrative and typically viewed as neutral because they do not reflect the insider’s sentiment toward the stock. The filing does not change Trinseo’s capital structure and provides no new information on operations, strategy or financial outlook.

Trinseo PLC (TSE) – Form 4 insider filing

Director Pierre-Marie De Leener reported a single transaction dated 06/21/2025 coded “F”, indicating shares were withheld by the company to satisfy tax obligations upon the vesting of previously granted restricted stock units. A total of 20,001 ordinary shares were disposed of at an implied price of $3.73 per share (≈ $74.6 thousand in value). Following the tax-related withholding, the director’s direct beneficial ownership stands at 36,174 shares.

The filing does not reflect an open-market sale or purchase initiated by the insider; therefore, it carries limited informational weight regarding insider sentiment. No derivative securities were involved, and there is no indication of a 10b5-1 trading plan.

Form 4 Overview – Trinseo PLC (TSE)

On 24 June 2025, Director Jeffrey J. Cote filed a Form 4 disclosing a tax-related share withholding that occurred on 21 June 2025. The transaction was coded “F,” indicating shares were withheld by the issuer solely to satisfy income-tax obligations stemming from the vesting of previously awarded restricted stock units. No open-market purchase or discretionary sale took place.

Key figures

• Shares withheld (disposed): 10,310 ordinary shares at an imputed price of $3.73 per share (≈ $38 k value).
• Direct holdings after transaction: 45,699 ordinary shares.
• Indirect holdings (Cote 2019 Irrevocable Indenture Trust): 150,600 shares.
• Total beneficial ownership after filing: 196,299 shares.

Because the disposition was for tax settlement, it does not signal a strategic change in Mr. Cote’s investment stance. The director retains the majority of his position, with post-transaction direct ownership declining by roughly 18% (10,310 of 56,009 previously held directly) but overall economic exposure remaining effectively unchanged. The filing is routine, carries no cash proceeds to the insider, and is unlikely to affect Trinseo’s fundamentals or governance profile.

Trinseo PLC (Ticker: TSE) filed a Form 4 disclosing that director Victoria Brifo had shares withheld to cover tax obligations arising from the vesting of previously granted restricted stock units.

The filing shows a single non-derivative transaction dated 06/21/2025 with transaction code “F” (payment of tax withholdings). A total of 9,576 ordinary shares were surrendered at an indicated price of $3.73 per share, equal to roughly $35.7 thousand. Following the withholding, Brifo’s direct beneficial ownership stands at 40,741 ordinary shares.

No derivative securities were involved and there were no open-market purchases or discretionary sales. Because the transaction was for tax withholding, it does not necessarily reflect the insider’s sentiment about Trinseo’s prospects, but it does reduce her outstanding share count by approximately 19% from the pre-withholding total of 50,317 shares.

Other than the routine tax-related share surrender, the filing contains no additional material changes, corporate actions, or strategic commentary.

SEC Form 4 snapshot: Trinseo PLC (TSE) director K. Lynne Johnson reported a disposal of 10,474 ordinary shares on 06/21/2025. The shares were withheld by the company at $3.73 per share to satisfy tax obligations tied to the vesting of previously granted restricted stock units (transaction code “F”).

After the tax-related withholding, Johnson’s direct ownership stands at 48,429 ordinary shares. No derivative securities or Rule 10b5-1 trading plan were disclosed.

Because “F”-coded transactions reflect mandatory tax settlements rather than discretionary trading, the filing is generally viewed as neutral with minimal impact on insider sentiment or valuation outlook.

Trinseo PLC (Ticker: TSE) – Form 4 filing dated 24 June 2025

The filing discloses an insider transaction by Director Jeanmarie F. Desmond. On 21 June 2025, the company withheld 10,343 ordinary shares to satisfy taxes triggered by the vesting of previously granted restricted stock units, a transaction coded “F” (tax-related disposition). The shares were valued at $3.73 per share. Following the withholding, Desmond’s direct ownership stands at 46,552 ordinary shares.

No derivative securities were reported and there were no open-market purchases or sales. The transaction is administrative in nature and does not represent an active trading decision by the director.

Trinseo PLC (TSE) submitted a Form 4 covering a single insider transaction by Director Joseph Alvarado.

On 21 June 2025, 10,327 ordinary shares were withheld by the company (transaction code “F”) to satisfy tax obligations arising from the vesting of previously granted restricted stock units. The shares were valued at $3.73, implying an aggregate value of roughly $38.5 thousand.

Following the tax-related disposition, Alvarado’s direct ownership stands at 52,187 shares. No open-market purchases or sales and no derivative security transactions were reported. Because the event is routine and non-discretionary, it generally carries neutral signaling value for investors.