Trinseo Plc SEC Filings

Form 4 filing overview: On 06/25/2025, Trinseo PLC (ticker: TSE) disclosed that Director Lynne K. Johnson received 42,484 ordinary shares through a restricted stock unit (RSU) award. The award was booked at an acquisition price of $0 and will vest in full on the first anniversary of the grant date. Following the grant, Johnson’s total beneficial ownership stands at 90,913 ordinary shares. No sales, option exercises, or other derivative transactions were reported, and there were no indications of 10b5-1 plan activity. The transaction is classified under code “A” (grant/acquisition) and is a routine director equity award intended to align management and shareholder interests.

Key facts from the Form 4 filing: On 06/25/2025 Trinseo PLC (ticker: TSE) reported that non-executive director Henri Steinmetz received 42,484 ordinary shares of the company under a restricted stock unit (RSU) award, recorded under transaction code “A” (grant without cash payment). The RSUs carry an acquisition price of $0 and will vest in full one year after the grant date, as noted in the explanatory footnote.

After the grant, Steinmetz’s total directly held stake rises to 95,937 shares. No derivative securities or additional transactions were disclosed, and the filing was made individually by Steinmetz (Form filed by one reporting person).

Investor take-aways:

• The transaction is a routine equity-based compensation grant for a board member, not an open-market purchase or sale. As such, it does not reflect active buying or selling sentiment.
• The incremental share issuance is de-minimis relative to Trinseo’s total shares outstanding and therefore has immaterial dilution impact on existing shareholders.
• Because the award vests after 12 months, it encourages continued board service and further aligns the director’s incentives with long-term shareholder value.

No financial results, guidance updates, or strategic developments accompanied the filing. Overall, the disclosure is administrative in nature and is unlikely to affect Trinseo’s near-term valuation or risk profile.

Form 4/A overview: Trinseo PLC (TSE) director Jeffrey J. Cote reported an amended change in beneficial ownership dated 06/21/2025 and filed 06/27/2025. The sole reportable transaction is coded “F”, indicating shares were withheld to cover taxes upon vesting of previously granted restricted stock units and therefore not an open-market sale.

Key details

• 10,310 ordinary shares were withheld at a reference price of $3.73, reducing Mr. Cote’s direct holdings to 45,699 shares.
• The filing corrects the size of an indirect position held by the Cote 2019 Irrevocable Indenture Trust to 170,503 shares; no new transaction occurred for this block.
• Total beneficial ownership after the amendment equals 216,202 shares (direct + indirect).

Investor take-away: Because the F-code transaction is a routine tax-withholding event and the amendment merely restates indirect ownership, the filing carries minimal market impact. No purchase or discretionary sale was executed, and the insider remains a substantial shareholder.

Trinseo (NYSE:TSE) filed an 8-K reporting results of its 25 Jun 2025 Annual General Meeting, where 85.5 % of outstanding shares were represented.

• Directors: all nine nominees re-elected.
• Say-on-Pay: 96.8 % support for 2024 compensation.
• Auditor: PwC ratified through 2025.
• Capital flexibility: shareholders authorized the Board to issue shares and disapply pre-emption rights on up to 10 % of issued capital.
• Treasury share re-issuance: price-range approved.
• 2014 Omnibus Incentive Plan amended; updated plan filed as Exhibit 10.1.
• Option forfeiture: CEO, CFO and CLO to surrender certain options (≈90 % approval).

No financial results were provided; the filing centers on governance and equity authorization, implying potential dilution offset by reduced option overhang.

Form 4 filing summary: On 06/21/2025 Trinseo PLC (TSE) director Mark E. Tomkins reported a transaction coded F, indicating the withholding of 10,105 ordinary shares at $3.73 each to satisfy taxes due upon the vesting of previously granted restricted stock units. Because the shares were withheld by the company rather than sold in the open market, the action is considered non-discretionary and does not signal a change in investment sentiment.

Following the transaction, Tomkins retains direct ownership of 36,619 shares. No derivative securities were acquired or disposed of, and there were no additional transactions disclosed. The document was signed on 06/24/2025 by an attorney-in-fact on Tomkins’ behalf.

Overall, the filing represents a routine tax-related adjustment with minimal financial impact on either the insider’s stake or the company’s share structure.

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.