| Item 1. | |
| (a) | Name of issuer:
Trinseo PLC |
| (b) | Address of issuer's principal executive offices:
440 East Swedesford Road, Suite 301, Wayne, Pennsylvania, 19087 |
| Item 2. | |
| (a) | Name of person filing:
This Statement is filed on behalf of each of the following persons (collectively, the "Reporting Persons"):
i) Nut Tree Capital Management, LP ("Nut Tree Capital Management");
ii) Nut Tree Capital Management GP, LLC ("Nut Tree Capital Management GP"); and
iii) Jared R. Nussbaum ("Mr. Nussbaum").
This Statement relates to Ordinary Shares, par value $0.01 per share (the "Shares"), held by Nut Tree Master Fund, LP ("Nut Tree Master Fund"). Nut Tree Capital Management serves as investment adviser to Nut Tree Master Fund. Nut Tree Capital Management GP serves as a general partner of Nut Tree Capital Management. Mr. Nussbaum serves as Chief Investment Officer and managing partner of Nut Tree Capital Management, and is the sole member of Nut Tree Capital Management GP. |
| (b) | Address or principal business office or, if none, residence:
The address of the principal business office of each of the Reporting Persons is 55 Hudson Yards, 22nd Floor, New York, NY 10001. |
| (c) | Citizenship:
i) Nut Tree Capital Management is a Delaware limited partnership;
ii) Nut Tree Capital Management GP is a Delaware limited liability company; and
iii) Mr. Nussbaum is a citizen of the United States of America. |
| (d) | Title of class of securities:
Ordinary Shares, par value $0.01 per share |
| (e) | CUSIP No.:
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| Item 3. | If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a: |
| (a) |  Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
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| (b) | Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
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| (c) | Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
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| (d) | Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
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| (e) |  An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
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| (f) | An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
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| (g) | A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
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| (h) | A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
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| (i) | A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
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| (j) | A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
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| (k) | Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
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| Item 4. | Ownership |
| (a) | Amount beneficially owned:
As of March 31, 2026, each of the Reporting Persons may be deemed the beneficial owner of 3,027,280 Shares held by Nut Tree Master Fund. |
| (b) | Percent of class:
As of March 31, 2026, each of the Reporting Persons may be deemed the beneficial owner of approximately 8.3% of the Shares outstanding. (There were approximately 36,559,868 Shares outstanding as of March 5, 2026, according to the Issuer's annual report on Form 10-K/A, filed April 27, 2026. |
| (c) | Number of shares as to which the person has:
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| | (i) Sole power to vote or to direct the vote:
0
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| | (ii) Shared power to vote or to direct the vote:
3,027,280
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| | (iii) Sole power to dispose or to direct the disposition of:
0
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| | (iv) Shared power to dispose or to direct the disposition of:
3,027,280
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| Item 5. | Ownership of 5 Percent or Less of a Class. |
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Not Applicable
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| Item 6. | Ownership of more than 5 Percent on Behalf of Another Person. |
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If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
See disclosure in Items 2 and 4 hereof. Nut Tree Master Fund has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, more than 5 percent of the Shares covered by this Statement that may be deemed to be beneficially owned by the Reporting Persons. |
| Item 7. | Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person. |
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If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary.
See disclosure in Item 2 hereof. |
| Item 8. | Identification and Classification of Members of the Group. |
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Not Applicable
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| Item 9. | Notice of Dissolution of Group. |
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Not Applicable
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