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Trinseo (TSE) director Cote reports RSU forfeiture and 42,484-share restructuring

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Trinseo PLC director Jeffrey J. Cote reported non-market updates to his holdings. A code J transaction reclassified 42,484 Ordinary Shares at a reported price of $0.00, categorized as an “other acquisition or disposition,” reflecting entity restructuring rather than an open-market trade. Following this, he directly holds 45,699 Ordinary Shares. A separate entry shows 170,503 Ordinary Shares held indirectly through the Cote 2019 Irrevocable Indenture Trust, which has a disinterested trustee for the benefit of Cote and his children. A footnote also describes a voluntary forfeiture of previously granted restricted stock units that had not vested or settled, so no shares were issued and no sale or purchase occurred.

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Insider COTE JEFFREY J
Role null
Type Security Shares Price Value
Other Ordinary Shares 42,484 $0.00 --
holding Ordinary Shares -- -- --
Holdings After Transaction: Ordinary Shares — 45,699 shares (Direct, null); Ordinary Shares — 170,503 shares (Indirect, By Cote 2019 Irrevocable Indenture Trust)
Footnotes (1)
  1. Reflects a voluntary forfeiture by the Reporting Person of restricted stock units ("RSUs") that were previously granted on June 25, 2025. At the time of forfeiture, the RSU award was not vested or settled, in full or in part. Represents shares held by an irrevocable indenture trust having a disinterested trustee for the benefit of the reporting person and children (the "Cote 2019 Irrevocable Indenture Trust").
Code J shares 42,484 shares Other acquisition or disposition at $0.00 per share
Direct holdings after transaction 45,699 shares Ordinary Shares held directly after code J entry
Indirect trust holdings 170,503 shares Ordinary Shares held by Cote 2019 Irrevocable Indenture Trust
Restructuring shares 42,484 shares Classified as restructuring in transaction summary
Transaction price $0.00 per share Reported price for the 42,484-share code J transaction
Holding entries 1 entry Non-transactional holding record on Form 4
restricted stock units ("RSUs") financial
"Reflects a voluntary forfeiture by the Reporting Person of restricted stock units ("RSUs") that were previously granted"
Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.
irrevocable indenture trust financial
"Represents shares held by an irrevocable indenture trust having a disinterested trustee"
disinterested trustee financial
"irrevocable indenture trust having a disinterested trustee for the benefit of the reporting person and children"
other acquisition or disposition financial
"transaction code description is "Other acquisition or disposition" for the code J entry"
indirect ownership financial
"total_shares_following_transaction of 170503.0000 reported as indirect ownership held by the trust"
Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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*
COTE JEFFREY J
(Last)(First)(Middle)
C/O TRINSEO PLC
440 EAST SWEDESFORD ROAD, SUITE 301
(Street)
WAYNE PENNSYLVANIA 19087
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
Trinseo PLC [ TSE ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/12/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

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)
CodeVAmount(A) or (D)Price
Ordinary Shares05/12/2026J(1)42,484D(1)45,699D
Ordinary Shares170,503I(2)By Cote 2019 Irrevocable Indenture Trust
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. Reflects a voluntary forfeiture by the Reporting Person of restricted stock units ("RSUs") that were previously granted on June 25, 2025. At the time of forfeiture, the RSU award was not vested or settled, in full or in part.
2. Represents shares held by an irrevocable indenture trust having a disinterested trustee for the benefit of the reporting person and children (the "Cote 2019 Irrevocable Indenture Trust").
/s/ Angelo Chaclas, Attorney-in-Fact05/14/2026
** Signature of Reporting PersonDate
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.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What insider activity did Trinseo (TSE) director Jeffrey Cote report?

Jeffrey Cote reported an “other” code J transaction involving 42,484 Ordinary Shares at $0.00 per share. The filing describes this as an other acquisition or disposition, indicating a restructuring-type adjustment rather than a traditional market buy or sell.

Were Trinseo (TSE) shares bought or sold on the market in this Form 4?

The Form 4 does not show open-market buys or sells. It records a code J “other acquisition or disposition” of 42,484 shares at $0.00, plus a holding entry, indicating internal restructuring and reporting changes instead of typical purchase or sale transactions.

How many Trinseo (TSE) shares does Jeffrey Cote hold directly after the transactions?

After the reported code J transaction, Jeffrey Cote directly holds 45,699 Ordinary Shares. This figure reflects his direct position following the non-derivative restructuring entry and helps investors gauge the scale of his personal share ownership.

What indirect Trinseo (TSE) holdings are linked to Jeffrey Cote?

The filing shows 170,503 Ordinary Shares held indirectly via the Cote 2019 Irrevocable Indenture Trust. The trust has a disinterested trustee and is for the benefit of Cote and his children, so these shares are reported as indirect ownership.

What does the RSU forfeiture in the Trinseo (TSE) Form 4 mean?

A footnote explains Cote voluntarily forfeited restricted stock units granted June 25, 2025, before they vested or settled. Because the RSUs never vested or settled, no actual Trinseo shares were issued or sold in connection with this forfeiture event.

What does transaction code J signify in the Trinseo (TSE) Form 4?

Transaction code J is described as an “other acquisition or disposition” of securities. In this Form 4, it covers a 42,484-share adjustment at $0.00, which the summary classifies as restructuring activity rather than a straightforward purchase or sale of Trinseo shares.