AG˹ٷ

STOCK TITAN

[Form 4] Trinseo PLC Insider Trading Activity

Filing Impact
(Low)
Filing Sentiment
(Negative)
Form Type
4
Rhea-AI Filing Summary

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.

Riepilogo della comunicazione Modulo 4: Il 21/06/2025 il direttore di Trinseo PLC (TSE), Mark E. Tomkins, ha segnalato una transazione codificata come F, che indica la ritenuta di 10.105 azioni ordinarie a $3,73 ciascuna per soddisfare le imposte dovute al momento della maturazione di unità azionarie vincolate precedentemente assegnate. Poiché le azioni sono state trattenute dalla società e non vendute sul mercato aperto, l’operazione è considerata non discrezionale e non rappresenta un cambiamento nel sentimento d’investimento.

Successivamente alla transazione, Tomkins mantiene la proprietà diretta di 36.619 azioni. Non sono stati acquisiti o ceduti titoli derivati e non sono state comunicate altre operazioni. Il documento è stato firmato il 24/06/2025 da un procuratore legale in rappresentanza di Tomkins.

In sintesi, la comunicazione rappresenta un aggiustamento di routine legato alle imposte con un impatto finanziario minimo sia sulla quota dell’insider che sulla struttura azionaria della società.

Resumen de presentación del Formulario 4: El 21/06/2025, el director de Trinseo PLC (TSE), Mark E. Tomkins, reportó una transacción codificada como F, que indica la retención de 10,105 acciones ordinarias a $3.73 cada una para cubrir impuestos adeudados tras el otorgamiento de unidades restringidas de acciones previamente concedidas. Dado que las acciones fueron retenidas por la empresa y no vendidas en el mercado abierto, la acción se considera no discrecional y no señala un cambio en el sentimiento de inversión.

Después de la transacción, Tomkins mantiene la propiedad directa de 36,619 acciones. No se adquirieron ni dispusieron valores derivados y no se divulgaron transacciones adicionales. El documento fue firmado el 24/06/2025 por un apoderado en nombre de Tomkins.

En general, la presentación representa un ajuste rutinario relacionado con impuestos con un impacto financiero mínimo tanto en la participación del insider como en la estructura accionarial de la empresa.

Form 4 제출 요약: 2025� 6� 21�, Trinseo PLC(TSE) 이사 Mark E. Tomkins� 코드 F� 표시� 거래� 보고했으�, 이는 이전� 부여된 제한 주식 단위가 확정� � 발생하는 세금� 충당하기 위해 주당 $3.73� 10,105� 보통주를 원천징수했음� 의미합니�. 주식� 공개 시장에서 판매� 것이 아니� 회사� 의해 원천징수되었� 때문� � 조치� ѫ량적으로 간주되며 투자 심리� 변화를 나타내지 않습니다.

거래 � Tomkins� 36,619주의 직접 소유권을 유지합니�. 파생 증권� 취득 또는 처분은 없었으며 추가 거래� 공개되지 않았습니�. 문서� 2025� 6� 24� Tomkins� 대신하� 법률 대리인� 서명했습니다.

전반적으� 이번 제출은 내부자의 지분이� 회사� 주식 구조� 미미� 재정� 영향� 있는 세금 관� 일상 조정임을 나타냅니�.

Résumé du dépôt du formulaire 4 : Le 21/06/2025, Mark E. Tomkins, administrateur de Trinseo PLC (TSE), a déclaré une transaction codée F, indiquant la retenue de 10 105 actions ordinaires à 3,73 $ chacune pour couvrir les impôts dus lors de la levée de droits sur des unités d’actions restreintes précédemment attribuées. Comme les actions ont été retenues par la société plutôt que vendues sur le marché libre, cette opération est considérée comme non discrétionnaire et ne reflète pas un changement de sentiment d’investissement.

Suite à cette transaction, Tomkins conserve la propriété directe de 36 619 actions. Aucun titre dérivé n’a été acquis ou cédé, et aucune autre transaction n’a été divulguée. Le document a été signé le 24/06/2025 par un mandataire agissant au nom de Tomkins.

Dans l’ensemble, ce dépôt représente un ajustement fiscal de routine avec un impact financier minimal tant sur la participation de l’initié que sur la structure actionnariale de la société.

Zusammenfassung der Form 4 Meldung: Am 21.06.2025 meldete Mark E. Tomkins, Direktor von Trinseo PLC (TSE), eine Transaktion mit dem Code F, die die Einbehaltung von 10.105 Stammaktien zu je 3,73 $ zur Begleichung der bei der Vesting von zuvor gewährten Restricted Stock Units anfallenden Steuern anzeigt. Da die Aktien vom Unternehmen einbehalten und nicht am offenen Markt verkauft wurden, gilt die Maßnahme als nicht diskretionär und signalisiert keine Änderung der Investitionsstimmung.

Nach der Transaktion behält Tomkins direkten Besitz an 36.619 Aktien. Es wurden keine Derivate erworben oder veräußert, und es wurden keine weiteren Transaktionen offengelegt. Das Dokument wurde am 24.06.2025 von einem Bevollmächtigten im Namen von Tomkins unterzeichnet.

Insgesamt stellt die Meldung eine routinemäßige steuerbedingte Anpassung mit minimalen finanziellen Auswirkungen sowohl auf den Anteil des Insiders als auch auf die Aktienstruktur des Unternehmens dar.

Positive
  • None.
Negative
  • None.

Insights

TL;DR: Routine tax withholding; no market signal, negligible impact on insider ownership or float.

This Form 4 shows an internal share withholding to cover payroll taxes triggered by RSU vesting. The transaction code F confirms it was automatic and not an elective sale, so it carries little informational value for investors. The dollar amount is modest (~$38k) relative to Trinseo’s market capitalization, and the director still holds a meaningful 36,619-share position, maintaining alignment with shareholders. I classify the disclosure as neutral and not impactful for valuation or sentiment.

Riepilogo della comunicazione Modulo 4: Il 21/06/2025 il direttore di Trinseo PLC (TSE), Mark E. Tomkins, ha segnalato una transazione codificata come F, che indica la ritenuta di 10.105 azioni ordinarie a $3,73 ciascuna per soddisfare le imposte dovute al momento della maturazione di unità azionarie vincolate precedentemente assegnate. Poiché le azioni sono state trattenute dalla società e non vendute sul mercato aperto, l’operazione è considerata non discrezionale e non rappresenta un cambiamento nel sentimento d’investimento.

Successivamente alla transazione, Tomkins mantiene la proprietà diretta di 36.619 azioni. Non sono stati acquisiti o ceduti titoli derivati e non sono state comunicate altre operazioni. Il documento è stato firmato il 24/06/2025 da un procuratore legale in rappresentanza di Tomkins.

In sintesi, la comunicazione rappresenta un aggiustamento di routine legato alle imposte con un impatto finanziario minimo sia sulla quota dell’insider che sulla struttura azionaria della società.

Resumen de presentación del Formulario 4: El 21/06/2025, el director de Trinseo PLC (TSE), Mark E. Tomkins, reportó una transacción codificada como F, que indica la retención de 10,105 acciones ordinarias a $3.73 cada una para cubrir impuestos adeudados tras el otorgamiento de unidades restringidas de acciones previamente concedidas. Dado que las acciones fueron retenidas por la empresa y no vendidas en el mercado abierto, la acción se considera no discrecional y no señala un cambio en el sentimiento de inversión.

Después de la transacción, Tomkins mantiene la propiedad directa de 36,619 acciones. No se adquirieron ni dispusieron valores derivados y no se divulgaron transacciones adicionales. El documento fue firmado el 24/06/2025 por un apoderado en nombre de Tomkins.

En general, la presentación representa un ajuste rutinario relacionado con impuestos con un impacto financiero mínimo tanto en la participación del insider como en la estructura accionarial de la empresa.

Form 4 제출 요약: 2025� 6� 21�, Trinseo PLC(TSE) 이사 Mark E. Tomkins� 코드 F� 표시� 거래� 보고했으�, 이는 이전� 부여된 제한 주식 단위가 확정� � 발생하는 세금� 충당하기 위해 주당 $3.73� 10,105� 보통주를 원천징수했음� 의미합니�. 주식� 공개 시장에서 판매� 것이 아니� 회사� 의해 원천징수되었� 때문� � 조치� ѫ량적으로 간주되며 투자 심리� 변화를 나타내지 않습니다.

거래 � Tomkins� 36,619주의 직접 소유권을 유지합니�. 파생 증권� 취득 또는 처분은 없었으며 추가 거래� 공개되지 않았습니�. 문서� 2025� 6� 24� Tomkins� 대신하� 법률 대리인� 서명했습니다.

전반적으� 이번 제출은 내부자의 지분이� 회사� 주식 구조� 미미� 재정� 영향� 있는 세금 관� 일상 조정임을 나타냅니�.

Résumé du dépôt du formulaire 4 : Le 21/06/2025, Mark E. Tomkins, administrateur de Trinseo PLC (TSE), a déclaré une transaction codée F, indiquant la retenue de 10 105 actions ordinaires à 3,73 $ chacune pour couvrir les impôts dus lors de la levée de droits sur des unités d’actions restreintes précédemment attribuées. Comme les actions ont été retenues par la société plutôt que vendues sur le marché libre, cette opération est considérée comme non discrétionnaire et ne reflète pas un changement de sentiment d’investissement.

Suite à cette transaction, Tomkins conserve la propriété directe de 36 619 actions. Aucun titre dérivé n’a été acquis ou cédé, et aucune autre transaction n’a été divulguée. Le document a été signé le 24/06/2025 par un mandataire agissant au nom de Tomkins.

Dans l’ensemble, ce dépôt représente un ajustement fiscal de routine avec un impact financier minimal tant sur la participation de l’initié que sur la structure actionnariale de la société.

Zusammenfassung der Form 4 Meldung: Am 21.06.2025 meldete Mark E. Tomkins, Direktor von Trinseo PLC (TSE), eine Transaktion mit dem Code F, die die Einbehaltung von 10.105 Stammaktien zu je 3,73 $ zur Begleichung der bei der Vesting von zuvor gewährten Restricted Stock Units anfallenden Steuern anzeigt. Da die Aktien vom Unternehmen einbehalten und nicht am offenen Markt verkauft wurden, gilt die Maßnahme als nicht diskretionär und signalisiert keine Änderung der Investitionsstimmung.

Nach der Transaktion behält Tomkins direkten Besitz an 36.619 Aktien. Es wurden keine Derivate erworben oder veräußert, und es wurden keine weiteren Transaktionen offengelegt. Das Dokument wurde am 24.06.2025 von einem Bevollmächtigten im Namen von Tomkins unterzeichnet.

Insgesamt stellt die Meldung eine routinemäßige steuerbedingte Anpassung mit minimalen finanziellen Auswirkungen sowohl auf den Anteil des Insiders als auch auf die Aktienstruktur des Unternehmens dar.

SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
TOMKINS MARK E

(Last) (First) (Middle)
C/O TRINSEO PLC
440 EAST SWEDESFORD ROAD, SUITE 301

(Street)
WAYNE PA 19087

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
Trinseo PLC [ TSE ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
06/21/2025
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Ordinary Shares 06/21/2025 F 10,105(1) D $3.73 36,619 D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Explanation of Responses:
1. Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units.
/s/ Angelo Chaclas, Attorney-in-Fact 06/24/2025
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

Why did Trinseo (TSE) insider Mark E. Tomkins dispose of 10,105 shares?

The shares were automatically withheld to pay taxes owed on the vesting of restricted stock units; no open-market sale occurred.

What was the transaction price reported in the Form 4 for TSE?

The withholding was recorded at $3.73 per share.

How many Trinseo shares does Mark E. Tomkins own after the transaction?

He directly holds 36,619 ordinary shares following the withholding.

Does this Form 4 indicate insider selling pressure at Trinseo?

No. Code F signifies tax withholding, not a discretionary sale, and thus offers little insight into selling intent.

When was the Form 4 for Trinseo filed and signed?

The form covers a transaction on 06/21/2025 and was signed on 06/24/2025.
Trinseo Plc

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Specialty Chemicals
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United States
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