# EDGAR Filing Document

**Accession Number:** 0001519061
**File Stem:** 0001104659-25-119859
**Filing Date:** 2025-12
**Character Count:** 8584
**Document Hash:** c3180a549e9061d1ec53fda9129d47e0
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-119859.hdr.sgml**: 20251210

**ACCESSION NUMBER**: 0001104659-25-119859

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20251205

**ITEM INFORMATION**: Cost Associated with Exit or Disposal Activities

**FILED AS OF DATE**: 20251210

**DATE AS OF CHANGE**: 20251210

**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:** 251560881

**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'? Trinseo PLC_December 5, 2025

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**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 5, 2025**

**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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| | | |
|:---|:---|:---|
| **Title of Each Class** | **Trading symbol(s)** | **Name of Each Exchange on which registered** |
| **Ordinary Shares, par value $0.01 per share** | **TSE** | **New York Stock Exchange** |

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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. ☐

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**ITEM 2.05** **Costs Associated with Exit or Disposal Activities.**

On December 5, 2025, the management team of Trinseo PLC (the "Company"), upon authorization from the Company's Board of Directors, approved a restructuring plan to permanently close its polystyrene ("PS") production operations in Schkopau, Germany with consolidation of remaining PS operations in Tessenderlo, Belgium (the "PS Restructuring Plan").

The Company expects to record total pre-tax restructuring charges of $30 million to $40 million, principally comprised of $3 million to $5 million of employee-related costs, $10 million to $14 million of asset-related charges and $15 million to $21 million related to exiting production activities, including contract terminations, demolition and decommissioning.

The anticipated future cash payments associated with these charges are expected to be approximately $18 million to $24 million with substantially all payments expected to be made by the end of 2028.

The Company expects the PS Restructuring Plan actions to commence in the fourth quarter of 2025 and be completed by the end of 2028 subject to the satisfaction of local law requirements. However, the actual timing and costs of the PS Restructuring Plan may differ from the Company's current expectations and estimates and such differences may be material since these charges are subject to ongoing negotiations with works councils, industrial associations and government authorities.

The Company estimates that the PS Restructuring Plan initiatives will deliver approximately $10 million of annualized profitability improvement beginning in 2026.

***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, our ability to successfully implement and complete proposed restructuring initiatives and to successfully generate cost savings through such initiatives; our ability to successfully negotiate agreements with relevant works councils, unions or third parties; 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; 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.*

**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: December 10, 2025 |  |  |

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