UNITED STATES

SECURITIES AND EXCHANGE COMMISSION 

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): December 9, 2024

Trinseo PLC

(Exact name of registrant as specified in its charter)

Ireland		001-36473		N/A
(State or other jurisdiction of incorporation or organization)		(Commission File Number)		(I.R.S. Employer Identification Number)

440 East Swedesford Road, Suite 301

Wayne, Pennsylvania 19087

(Address of principal executive offices, including zip code)

(610 )240-3200

(Telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class	Trading symbol	Name of Exchange on which registered
Ordinary Shares, par value $0.01 per share	TSE	New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Item 1.01

Entry into a Material Definitive Agreement

As previously announced on December 10, 2024, Trinseo PLC (the "Company"), and certain of its direct and indirect subsidiaries, entered into a transaction support agreement dated December 9, 2024 (the “Transaction Support Agreement”).

The description of the Transaction Support Agreement included in the Company's Current Report on Form 8-K dated December 10, 2024, and the transactions contemplated thereby is not complete and is qualified in its entirety by the Transaction Support Agreement, a copy of which is attached hereto as Exhibit 10.1 and incorporated herein by reference.

Item 9.01

Financial Statements and Exhibits.

10.1*	Transaction Support Agreement, dated December 9, 2024, by and among the Company, and certain of their direct and indirect subsidiaries party thereto, and each of the Supporting Creditors thereto.
104	Cover Page Interactive Data File (embedded within the Inline XBRL document)

* Certain schedules, exhibits and similar attachments have been omitted pursuant to Item 601(a)(5) of Regulation S-K and portions of this exhibit have been redacted pursuant to Item 601(b)(2) of Regulation S-K. The Company will provide a copy of such omitted materials to the Securities and Exchange Commission or its staff upon request.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	TRINSEO PLC

	By:	/s/ David Stasse
	Name:	David Stasse
	Title:	Executive Vice President and Chief Financial Officer

Date: December 11, 2024

Trinseo PLC filed SEC Form 8-K: Entry into a Material Definitive Agreement, Financial Statements and Exhibits