# EDGAR Filing Document

**Accession Number:** 0001519061
**File Stem:** 0001104659-26-053165
**Filing Date:** 2026-4
**Character Count:** 10385
**Document Hash:** 4383736c4e30efe879b7c6fa9ba4b96e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-053165.hdr.sgml**: 20260430

**ACCESSION NUMBER**: 0001104659-26-053165

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 11

**CONFORMED PERIOD OF REPORT**: 20260430

**ITEM INFORMATION**: Entry into a Material Definitive Agreement

**ITEM INFORMATION**: Regulation FD Disclosure

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260430

**DATE AS OF CHANGE**: 20260430

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Trinseo PLC
- **CENTRAL INDEX KEY:** 0001519061
- **STANDARD INDUSTRIAL CLASSIFICATION:** PLASTICS, MATERIALS, SYNTH RESINS & NONVULCAN ELASTOMERS [2821]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 000000000
- **STATE OF INCORPORATION:** L2
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-36473
- **FILM NUMBER:** 26927179

**BUSINESS ADDRESS:**
- **STREET 1:** 440 EAST SWEDESFORD ROAD
- **STREET 2:** SUITE 301
- **CITY:** WAYNE
- **STATE:** PA
- **ZIP:** 19087
- **BUSINESS PHONE:** 610-240-3200

**MAIL ADDRESS:**
- **STREET 1:** 440 EAST SWEDESFORD ROAD
- **STREET 2:** SUITE 301
- **CITY:** WAYNE
- **STATE:** PA
- **ZIP:** 19087

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Trinseo S.A.
- **DATE OF NAME CHANGE:** 20110429

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Bain Capital Everest (Luxco 2) S.a r.l.
- **DATE OF NAME CHANGE:** 20110426

?xml version='1.0' encoding='ASCII'?

**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): **April 30, 2026**

**Trinseo PLC**

(Exact name of registrant as specified in its charter)

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

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**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:

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| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**<u>Title of Each Class</u>** | &nbsp;&nbsp;**<u>Trading symbol(s)</u>** | &nbsp;&nbsp;**<u>Name of Each Exchange</u> <br> <u>on which registered</u>** |
| &nbsp;&nbsp;Ordinary Shares, par value $0.01 per share | &nbsp;&nbsp;TSEOF | &nbsp;&nbsp;N/A\* |

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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. ◻

*\* *On March 23, 2026, the NYSE filed a Form 25 relating to the delisting from the NYSE of our ordinary shares. The delisting became effective on March 30, 2026. The ordinary shares will continue to trade over the counter under the symbol "TSEOF."*

**EXPLANATORY NOTE**

This Current Report is being filed to report extensions of the expiration dates of certain waiver agreements (collectively, the "Existing Waivers") previously disclosed under Item 1.01 of, and filed as exhibits to, the Current Report on Form 8-K filed by Trinseo PLC (the "Company") with the U.S. Securities and Exchange Commission on March 19, 2026 (the "Prior 8-K"). As permitted by the terms of the applicable Existing Waiver, the Company received confirmations from the applicable counterparties extending the expiration date of each Existing Waiver as described below. No new waiver agreement was entered into in connection with such extensions.

 ****

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| | |
|:---|:---|
| **ITEM 1.01** | **Entry into a Material Definitive Agreement.** |

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 **

***Revolver Waiver.***

 **

As permitted by the waiver under the Company's super-priority revolving credit facility dated January 17, 2025, the counterparties confirmed the extension of such waiver's expiration date until May 13, 2026.

***Senior Credit Facility Waiver.***

 ****

As permitted by the waiver under the Company's Credit Agreement dated as of September 6, 2017, the counterparties confirmed the extension of such waiver's expiration date until May 13, 2026.

***Refinance Credit Facility Waiver.***

 ****

As permitted by the waiver under the Company's Credit Agreement dated as of September 8, 2023, the counterparties confirmed the extension of such waiver's expiration date until May 13, 2026.

***Securitization Waiver.***

 ****

As permitted by the waiver under the Credit and Security Agreement dated as of July 18, 2024 governing the Company's accounts receivable securitization facility, the counterparties confirmed the extension of such waiver's expiration date until May 14, 2026.

The foregoing descriptions of the Existing Waivers are qualified in their entirety by reference to the full text of each Existing Waiver, copies of which were filed as exhibits to the Prior 8-K and are incorporated herein by reference.

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| | |
|:---|:---|
| **ITEM 7.01** | **Regulation FD Disclosure.** |

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The information set forth in the Explanatory Note and under Item 1.01 of this Current Report on Form 8-K is incorporated by reference into this Item 7.01. The information under this Item 7.01 of this Current Report on Form 8-K is being furnished and shall not be deemed "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section. The information under this Item 7.01 shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, as amended.

**Cautionary Note on Forward Looking Statements**

This Current Report may contain forward-looking statements including, without limitation, statements concerning plans, objectives, goals, projections, forecasts, strategies, future events or performance, and underlying assumptions and other statements, which are not statements of historical facts or guarantees or assurances of future performance. Forward-looking statements may be identified by the use of words like "expect," "anticipate," "believe," "intend," "forecast," "outlook," "will," "may," "might," "see," "tend," "assume," "potential," "likely," "target," "plan," "contemplate," "seek," "attempt," "should," "could," "would" or expressions of similar meaning. Forward-looking statements reflect management's evaluation of information currently available and are based on the Company's current expectations and assumptions regarding its business, the economy, its current indebtedness, and other future conditions. Because forward-looking statements relate to the future, they are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict. Factors that might cause future results to differ from those expressed by the forward-looking statements include, but are not limited to, outcome of discussions with our financial stakeholders regarding our capital structure; our ability to successfully restructure our indebtedness through an in-court or out-of-court process; our ability to obtain necessary waivers, consents or amendments from our lenders; our ability to successfully execute our overall business and transformation strategy; increased costs or disruption in the supply of raw materials; deterioration of our credit profile limiting our access to commercial credit; compliance with laws and regulations impacting our business; conditions in the global economy and capital markets; our current and future levels of indebtedness and ability to service our debt; our ability to meet the covenants under our existing indebtedness; our ability to generate cash flows from operations; our ability to successfully implement and complete proposed restructuring initiatives and to successfully generate cost savings through such initiatives; and those discussed in our Annual Report on Form 10-K, under Part I, Item 1A — "Risk Factors" and elsewhere in our other reports, filings and furnishings made with the U.S. Securities and Exchange Commission from time to time. As a result of these or other factors, the Company's actual results, performance or achievements may differ materially from those contemplated by the forward-looking statements. Therefore, we caution you against relying on any of these forward-looking statements. The forward-looking statements included in this Current Report are made only as of the date hereof. The Company undertakes no obligation to publicly update or revise any forward-looking statement as a result of new information, future events or otherwise, except as otherwise required by law.

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| | |
|:---|:---|
| **ITEM 9.01** | **Exhibits.** |
| 104 | Cover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101) |

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**SIGNATURE**

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

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| | | |
|:---|:---|:---|
|  | **TRINSEO PLC** | **TRINSEO PLC** |
|  | By: | /s/ David Stasse |
|  | Name: | David Stasse |
|  | Title: | Executive Vice President and Chief Financial Officer |
| Date: April 30, 2026 |  |  |

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