Form 8-K - Current report

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): November 6, 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 2.02

Results of Operations and Financial Condition

On November 6, 2024, Trinseo PLC, a public limited company existing under the laws of Ireland (the “Company”), issued a press release announcing its financial results for the third quarter ended September 30, 2024. A copy of the press release is furnished as Exhibit 99.1 hereto. The Company intends to hold an investor call and webcast to discuss these results on Thursday, November 7, 2024 at 10 AM Eastern Time. Ahead of this call the Company is also making available on its website an investor presentation, which will be discussed on the call and is furnished as Exhibit 99.2 hereto.

The information contained herein and in the accompanying exhibits shall not be deemed filed for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such a filing.

ITEM 9.01.

Financial Statements and Exhibits

(d) Exhibits

ay
Exhibit Number		Description
99.1		Press Release dated November 6, 2024
99.2		Investor Presentation, dated November 6, 2024
104		Cover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101)

SIGNATURES

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

a
	TRINSEO PLC


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

Date: November 6, 2024

Exhibit 99.1


Contact:
Bee van Kessel
Tel : +41 44 718 3685
Email: bvankessel@trinseo.com

Trinseo Reports Third Quarter 2024 Financial Results and Provides Fourth Quarter Outlook

Third Quarter 2024 and Other Highlights

●	Net loss of $87 million, including pre-tax restructuring and other charges of $26 million related to recently announced restructuring initiatives, and EPS of negative $2.47

●	Adjusted EBITDA* of $66 million was $25 million higher than prior year

●	Cash provided by operations of $9 million and capital expenditures of $12 million resulted in Free Cash Flow* of negative $3 million, a sequential improvement of $53 million. Third quarter Free Cash Flow* included a $16 million decrease in trade working capital

●	Third quarter ending cash of $167 million, of which $2 million was restricted, with approximately $177 million of additional available liquidity under two committed financing facilities with continued focus on cash management and liquidity

●	Announced restructuring initiatives focused on the consolidation of business management and support function roles, which are expected to result in cost savings of $25 million in 2025 and full run rate savings of $30 million by the end of 2026


	Three Months Ended
	September 30,
$millions, except per share data	2024		2023
Net Sales	$	868	$	879
Net Loss		(87)		(38)
Diluted EPS ($)		(2.47)		(1.09)
Adjusted Net Loss*		(58)		(36)
Adjusted EPS ($)*		(1.62)		(1.03)
EBITDA*		37		29
Adjusted EBITDA*		66		41

*For a reconciliation of EBITDA, Adjusted EBITDA, and Adjusted Net Loss, all of which are non-GAAP measures, to Net Loss, as well as a reconciliation of Free Cash Flow and Adjusted EPS, see Notes 2 and 3 to the financial statements included below.

WAYNE, Pa — November 6, 2024 — Trinseo (NYSE: TSE), a specialty material solutions provider, today reported its third quarter 2024 financial results. Net sales of $868 million in the third quarter decreased 1% versus prior year. Lower sales volumes, primarily related to intentional volume reduction of low-margin business in Polystyrene and, to a lesser extent, Latex Binders, resulted in an 8% decrease in net sales. Higher prices, from the pass-through of higher raw material costs, led to a 7% increase.

Third quarter net loss of $87 million was $49 million worse than prior year primarily due to higher interest, tax and restructuring expenses in the current year. However, Adjusted EBITDA of $66 million, which included a favorable impact of $3 million from net timing, was $25 million above prior year, reflecting improved results in all business segments except Americas Styrenics, which was negatively impacted by unplanned outages during the quarter. Savings from previously announced restructuring actions, lower natural gas hedge losses and a favorable net timing variance positively contributed to third quarter results.

Commenting on the Company’s third quarter performance, Frank Bozich, President and Chief Executive Officer of Trinseo, said, “As expected, market conditions and Adjusted EBITDA were sequentially similar to the prior quarter. Despite continued weak demand in many of our end markets, particularly building and construction and appliances, we saw significant year-over-year profitability improvement largely as a result of our restructuring actions and continued moderation of European input costs.”

Third Quarter Results and Commentary by Business Segment

●

Engineered Materials net sales of $207 million for the quarter increased 12% versus prior year including a 6% impact from higher sales volume primarily from higher sales of compounds for consumer electronics and medical applications. Additionally, higher price, due to favorable product mix and higher MMA market prices, resulted in a 6% increase. Adjusted EBITDA of $25 million was $20 million above prior year due to higher margins from moderating input costs and a favorable net timing variance, as well as higher sales volumes.

●

Latex Binders net sales of $242 million for the quarter increased 8% versus prior year as a 4% impact from lower volumes, primarily in paper and carpet applications in Asia and Europe, was more than offset by a 12% impact from higher price from the pass-through of higher raw material costs. Adjusted EBITDA of $26 million was $8 million above prior year due to higher margin from the exit of styrene production in Terneuzen as well as a favorable net timing variance. While total sales volume decreased, the Adjusted EBITDA impact was neutral because of improved regional and product mix. Sales volumes sold to CASE applications accounted for 12% of total segment volumes for the second quarter in a row and increased 6% over prior year.

●

Plastics Solutions net sales of $268 million for the quarter were 3% above prior year from higher price due to the pass-through of higher raw material costs. Adjusted EBITDA of $28 million was $11 million above prior year due to higher margin from the exit of styrene production in Terneuzen as well as higher fixed cost absorption related to building inventory ahead of the Stade, Germany virgin polycarbonate closure. This inventory build is expected to reverse in the fourth quarter.

●

Polystyrene net sales of $151 million for the quarter were 28% below prior year including a 35% impact from lower sales volume. This was a result of lower styrene-related sales following the closure of Terneuzen, the Netherlands styrene production facility, and an intentional reduction of low-margin sales to optimize plant operations and sales mix. This was partially offset by a 7% impact from higher price from the pass-through of higher styrene costs. Adjusted EBITDA of $4 million was $5 million above prior year as higher margins and lower fixed costs from the exit of styrene production in Terneuzen was partially offset by lower sales volumes.

●	Americas Styrenics Adjusted EBITDA of $4 million for the quarter was $15 million below prior year due to unplanned outages and lower styrene margins.

2024 Outlook

●	Fourth quarter 2024 net loss of $81 million to $71 million

●	Fourth quarter 2024 Adjusted EBITDA of $40 million to $50 million

Commenting on the fourth quarter outlook, Bozich said, “We expect Adjusted EBITDA to be sequentially lower from year-end seasonality, but still higher than the prior year due to the benefits from our restructuring initiatives. We also expect free cash flow to turn positive in the fourth quarter due to typical seasonal working capital improvements.”

Bozich continued, “While we are pleased to see a sustained higher level of profitability, low demand has persisted in many of our end markets and the timing of a broad market improvement is uncertain. Therefore, we made the difficult decision to take additional restructuring actions including the consolidation of business management and support-function roles, and the decision to exit virgin polycarbonate production at our facility in Stade. While decisions like these are never easy, we believe they will result in a more streamlined organizational structure and manufacturing footprint against a challenging macroeconomic backdrop that is beyond our control.”

Conference Call and Webcast Information

Trinseo will host a conference call to discuss its third quarter 2024 financial results on Thursday, November 7, 2024 at 10 a.m. Eastern Time.

Commenting on results will be Frank Bozich, President and Chief Executive Officer, David Stasse, Executive Vice President and Chief Financial Officer, and Bee van Kessel, Senior Vice President, Corporate Finance and Investor Relations.

For those interested in asking questions during the Q&A session, please register using the following link:

●

Conference Call Registration

For those interested in listening only, please register for the webcast using the following link:

●

Webcast Registration

After registering for the conference call, you will receive a confirmation email with a meeting invitation and information for entry. Registration is open through the live call, but it is advised that you register in advance to ensure you are connected for the full call.

Trinseo has posted its third quarter 2024 financial results on the Company’s Investor Relations website. The presentation slides will also be made available in the webcast player prior to the conference call. The Company will also furnish copies of the financial results press release and presentation slides to investors by means of a Form 8-K filing with the U.S. Securities and Exchange Commission.

A replay of the conference call and transcript will be archived on the Company’s Investor Relations website shortly following the conference call. The replay will be available until November 7, 2025.

About Trinseo

Trinseo (NYSE: TSE), a specialty material solutions provider, partners with companies to bring ideas to life in an imaginative, smart and sustainably focused manner by combining its premier expertise, forward-looking innovations and best-in-class materials to unlock value for companies and consumers.

From design to manufacturing, Trinseo taps into decades of experience in diverse material solutions to address customers’ unique challenges in a wide range of industries, including building and construction, consumer goods, medical and mobility.

Trinseo’s employees bring endless creativity to reimagining the possibilities with clients all over the world from the company’s locations in North America, Europe and Asia Pacific. Trinseo reported net sales of approximately $3.7 billion in 2023. Discover more by visiting www.trinseo.com and connecting with Trinseo on LinkedIn, Twitter, Facebook and WeChat.

Use of non-GAAP measures

In addition to using standard measures of performance and liquidity that are recognized in accordance with accounting principles generally accepted in the United States of America (“GAAP”), we use additional measures of income excluding certain GAAP items (“non-GAAP measures”), such as Adjusted Net Income, EBITDA, Adjusted EBITDA and Adjusted EPS and measures of liquidity excluding certain GAAP items, such as Free Cash Flow. We believe these measures are useful for investors and management in evaluating business trends and performance each period. These measures are also used to manage our business and assess current period profitability, as well as to provide an appropriate basis to evaluate the effectiveness of our pricing strategies. Such measures are not recognized in accordance with GAAP and should not be viewed as an alternative to GAAP measures of performance or liquidity, as applicable. The definitions of each of these measures, further discussion of usefulness, and reconciliations of non-GAAP measures to GAAP measures are provided in the Notes to Condensed Consolidated Financial Information presented herein.

Cautionary Note on Forward-Looking Statements

This press release 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 our current expectations and assumptions regarding our business, the economy, our 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 proposed restructuring initiatives, including the closure of certain plants and production lines, and to successfully generate cost savings through restructuring and cost reduction initiatives; our ability

to successfully execute our business and transformation strategy; the timing of, and our ability to complete, the sale of our interest in Americas Styrenics; increased costs or disruption in the supply of raw materials; deterioration of our credit profile limiting our access to commercial credit;increased energy costs; compliance with laws and regulations impacting our business; any disruptions in production at our chemical manufacturing facilities, including those resulting from accidental spills or discharges; 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 achieve our forecasted cash flows; 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, our 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 press release are made only as of the date hereof. We undertake 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.

TRINSEO PLC

Condensed Consolidated Statements of Operations

(In millions, except per share data)

(Unaudited)


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2024		2023		2024		2023
Net sales	$	867.7	$	879.0	$	2,691.7	$	2,837.9
Cost of sales		787.1		847.7		2,482.1		2,715.9
Gross profit		80.6		31.3		209.6		122.0
Selling, general and administrative expenses		97.0		66.6		237.2		205.1
Equity in earnings of unconsolidated affiliate		4.0		19.0		25.8		49.2
Impairment and other charges		—		0.1		—		349.5
Operating loss		(12.4)		(16.4)		(1.8)		(383.4)
Interest expense, net		72.3		46.6		200.0		125.1
Loss on extinguishment of long-term debt		0.6		6.3		0.6		6.3
Other income, net		(1.4)		(13.2)		(0.9)		(19.0)
Loss before income taxes		(83.9)		(56.1)		(201.5)		(495.8)
Provision for (benefit from) income taxes		3.4		(17.7)		29.1		(59.5)
Net loss	$	(87.3)	$	(38.4)	$	(230.6)	$	(436.3)
Weighted average shares- basic		35.4		35.2		35.3		35.1
Net loss per share- basic	$	(2.47)	$	(1.09)	$	(6.53)	$	(12.42)
Weighted average shares- diluted		35.4		35.2		35.3		35.1
Net loss per share- diluted	$	(2.47)	$	(1.09)	$	(6.53)	$	(12.42)

TRINSEO PLC

Condensed Consolidated Balance Sheets

(In millions)

(Unaudited)


	September 30,		December 31,
	2024		2023
Assets
Cash and cash equivalents	$	165.3	$	259.1
Accounts receivable, net of allowance		474.5		490.8
Inventories		434.8		404.7
Other current assets		45.1		39.5
Investments in unconsolidated affiliate		263.0		252.2
Property, plant, equipment, goodwill, and other intangible assets, net		1,314.9		1,401.4
Right-of-use assets - operating, net		65.6		65.3
Other long-term assets		119.6		116.2
Total assets	$	2,882.8	$	3,029.2
Liabilities and shareholders’ equity
Current liabilities		814.2		672.6
Long-term debt, net of unamortized deferred financing fees		2,187.3		2,277.6
Noncurrent lease liabilities - operating		54.3		51.7
Other noncurrent obligations		307.0		295.3
Shareholders’ equity		(480.0)		(268.0)
Total liabilities and shareholders’ equity	$	2,882.8	$	3,029.2

TRINSEO PLC

Condensed Consolidated Statements of Cash Flows

(In millions)

(Unaudited)


	Nine Months Ended
	September 30,
	2024		2023
Cash flows from operating activities
Cash provided by (used in) operating activities	$	(99.3)	$	131.2

Cash flows from investing activities
Capital expenditures		(42.1)		(49.1)
Proceeds from the sale of businesses and other assets		8.2		38.0
Cash used in investing activities		(33.9)		(11.1)

Cash flows from financing activities
Deferred financing fees		(4.6)		(9.5)
Short-term borrowings, net		(14.0)		(8.9)
Dividends paid		(1.3)		(17.6)
Proceeds from exercise of option awards		—		0.1
Withholding taxes paid on restricted share units		—		(2.0)
Acquisition-related contingent consideration payment		(0.7)		(1.2)
Net proceeds from issuance of 2028 Refinance Term Loans		—		1,044.9
Repurchases and repayments of long-term debt		(13.7)		(1,054.0)
Proceeds from Accounts Receivable Securitization Facility		438.2		—
Repayments of Accounts Receivable Securitization Facility		(363.2)		—
Cash provided by (used in) financing activities		40.7		(48.2)
Effect of exchange rates on cash		(1.0)		(5.0)
Net change in cash, cash equivalents, and restricted cash		(93.5)		66.9
Cash, cash equivalents, and restricted cash—beginning of period		261.1		211.7
Cash, cash equivalents, and restricted cash—end of period	$	167.6	$	278.6
Less: Restricted cash		2.3		—
Cash and cash equivalents—end of period	$	165.3	$	278.6

TRINSEO PLC

Notes to Condensed Consolidated Financial Information

(Unaudited)

Note 1: Net Sales by Segment


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(In millions)	2024		2023		2024		2023
Engineered Materials	$	207.5	$	186.0	$	626.8	$	598.4
Latex Binders		241.9		223.7		735.8		727.5
Plastics Solutions		267.7		259.0		796.1		840.9
Polystyrene		150.6		210.3		533.0		671.1
Americas Styrenics*		—		—		—		—
Total Net Sales	$	867.7	$	879.0	$	2,691.7	$	2,837.9

* The results of this segment are comprised entirely of earnings from Americas Styrenics, our 50%-owned equity method investment. As such, we do not separately report net sales of Americas Styrenics within our condensed consolidated statements of operations.

Note 2: Reconciliation of Non-GAAP Performance Measures to Net Income

EBITDA is a non-GAAP financial performance measure, which is defined as income from continuing operations before interest expense, net; income tax provision; depreciation and amortization expense. We refer to EBITDA in making operating decisions because we believe it provides our management as well as our investors with meaningful information regarding the Company’s operational performance. We believe the use of EBITDA as a metric assists our board of directors, management and investors in comparing our operating performance on a consistent basis.

We also present Adjusted EBITDA as a non-GAAP financial performance measure, which we define as income from continuing operations before interest expense, net; income tax provision; depreciation and amortization expense; loss on extinguishment of long-term debt; asset impairment charges; gains or losses on the dispositions of businesses and assets; restructuring charges; acquisition related costs and benefits, and other items. In doing so, we are providing management, investors, and credit rating agencies with an indicator of our ongoing performance and business trends, removing the impact of transactions and events that we would not consider a part of our core operations.

Lastly, we present Adjusted Net Income (Loss) and Adjusted EPS as additional performance measures. Adjusted Net Income (Loss) is calculated as Adjusted EBITDA (defined beginning with net income from continuing operations, above), less interest expense, less the provision for income taxes and depreciation and amortization, tax affected for various discrete items, as appropriate. Adjusted EPS is calculated as Adjusted Net Income (Loss) per weighted average diluted shares outstanding for a given period. We believe that Adjusted Net Income (Loss) and Adjusted EPS provide transparent and useful information to management, investors, analysts and other stakeholders in evaluating and assessing our operating results from period-to-period after removing the impact of certain transactions and activities that affect comparability and that are not considered part of our core operations.

There are limitations to using the financial performance measures noted above. These performance measures are not intended to represent net income or other measures of financial performance. As such, they should not be used as alternatives to net income as indicators of operating performance. Other companies in our industry may define these performance measures differently than we do. As a result, it may be difficult to use these or similarly-named financial measures that other companies may use, to compare the performance of those companies to our performance. We compensate for these limitations by providing reconciliations of these performance measures to our net income, which is determined in accordance with GAAP.


	Three Months Ended
	September 30,
(In millions, except per share data)	2024		2023
Net loss	$	(87.3)	$	(38.4)
Interest expense, net		72.3		46.6
Provision for (benefit from) income taxes		3.4		(17.7)
Depreciation and amortization		48.3		38.2
EBITDA	$	36.7	$	28.7
Net gain on disposition of businesses and assets		—		(9.3)	Selling, general, and administrative expenses; Other expense (income), net
Restructuring and other charges (a)		28.5		13.8	Selling, general, and administrative expenses
Asset impairment charges or write-offs		—		0.5	Impairment and other charges
Other items (b)		0.9		7.2	Cost of goods sold; Selling, general, and administrative expenses; Loss on extinguishment of long-term debt
Adjusted EBITDA	$	66.1	$	40.9
Adjusted EBITDA to Adjusted Net Loss:
Adjusted EBITDA		66.1		40.9
Interest expense, net		72.3		46.6
Provision for income taxes - Adjusted (c)		3.5		(18.6)
Depreciation and amortization - Adjusted (d)		47.8		49.2
Adjusted Net Loss	$	(57.5)	$	(36.3)
Weighted average shares- diluted		35.4		35.2
Adjusted EPS	$	(1.62)	$	(1.03)

Adjusted EBITDA by Segment:
Engineered Materials	$	25.0	$	4.8
Latex Binders		25.6		18.4
Plastics Solutions		27.7		16.9
Polystyrene		4.1		(0.7)
Americas Styrenics		4.0		19.0
Corporate Unallocated		(20.3)		(17.5)
Adjusted EBITDA	$	66.1	$	40.9

(a)

Restructuring and other charges for the 2024 and 2023 periods primarily relate to employee termination benefits, contract termination costs as well as decommissioning and other charges incurred in connection with the Company’s restructuring plans.

(b)

Other items for the 2024 and 2023 periods primarily relate to fees incurred in conjunction with certain of the Company’s strategic initiatives, as well as costs related to our transition to a new enterprise resource planning system.

(c)

Adjusted to remove the tax impact of the items noted within the table above. The income tax expense (benefit) related to these items was determined utilizing either (1) the estimated annual effective tax rate on our ordinary income based upon our forecasted ordinary income for the full year or, (2) for items treated discretely for tax purposes we utilized the applicable rates in the taxing jurisdictions in which these adjustments occurred.

(d)

Amounts for the three months ended September 30, 2024 and 2023 excludes accelerated depreciation of $(0.4) million and $11.0 million, respectively. The 2024 period charges are primarily related to the shortening of the useful life of certain assets related to the asset optimization and corporate restructuring plan. The 2023 period charges are primarily related to the shortening of the useful life of certain assets related to the asset restructuring plan as well as charges related to the shortening of the useful life of certain IT assets related to the Company’s transition to a new enterprise resource planning system.

For the same reasons discussed above, we are providing the following reconciliation of forecasted net loss to forecasted Adjusted EBITDA, Adjusted Net Loss and Adjusted EPS for the three months ended December 31, 2024. See “Note on Forward-Looking Statements” above for a discussion of the limitations of these forecasts. Totals may not sum due to rounding.


		Three Months Ended
		December 31,
(In millions, except per share data)		2024
Adjusted EBITDA	$	40 - 50
Interest expense, net		68
Provision for income taxes		5
Depreciation and amortization		48
Reconciling items to Adjusted EBITDA (e)		—
Net Loss		(81) - (71)
Reconciling items to Adjusted Net Loss (e)		—
Adjusted Net Loss	$	(81) - (71)

Weighted average shares - diluted (f)		35.3
EPS - diluted ($)	$	(2.29) - (2.01)
Adjusted EPS ($)	$	(2.29) - (2.01)

(e)

Reconciling items to Adjusted EBITDA and Adjusted Net Income (Loss) are not typically forecasted by the Company based on their nature as being primarily driven by transactions that are not part of the core operations of the business and, as a result, cannot be estimated without unreasonable cost or uncertainty. As such, for the forecasted fourth quarter ended December 31, 2024, we have not included estimates for these items.

(f)

Weighted average shares presented for the purpose of forecasting EPS and Adjusted EPS assume that the Company will be in a net loss position for fourth quarter 2024, and therefore excludes the impact of potentially dilutive shares, as the inclusion of said shares would have an anti-dilutive effect. Further, the weighted average shares presented do not forecast significant future share transactions or events, such as repurchases, significant share-based compensation award grants, and changes in the Company’s share price. These are all factors which could have a significant impact on the calculation of EPS and Adjusted EPS during actual future periods.

Note 3: Reconciliation of Non-GAAP Liquidity Measures to Cash from Operations

The Company uses certain measures, such as Free Cash Flow as non-GAAP measures, to evaluate and discuss its liquidity position and results. Free Cash Flow is defined as cash from operating activities, less capital expenditures. We believe that Free Cash Flow provides an indicator of the Company’s ongoing ability to generate cash through core operations, as it excludes the cash impacts of various financing transactions as well as cash flows from business combinations that are not considered organic in nature. We also believe that Free Cash Flow provides management and investors with useful analytical indicators of our ability to service our indebtedness, pay dividends (when declared), and meet our ongoing cash obligations.

Free Cash Flow is not intended to represent cash flows from operations as defined by GAAP, and therefore, should not be used as alternatives for that measure. Other companies in our industry may define Free Cash Flow differently than we do. As a result, it may be difficult to use this or similarly-named financial measures that other companies may use, to compare the liquidity and cash generation of those companies to our own. The Company compensates for these limitations by providing the following detail, which is determined in accordance with GAAP.

Free Cash Flow


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(In millions)	2024		2023		2024		2023
Cash provided by (used in) operating activities	$	8.8	$	29.3	$	(99.3)	$	131.2
Capital expenditures		(12.2)		(13.5)		(42.1)		(49.1)
Free Cash Flow	$	(3.4)	$	15.8	$	(141.4)	$	82.1

Exhibit 99.2

1 Trademark of Trinseo PLC or its affiliates Third Quarter 2024 Financial Results & Fourth Quarter Outlook November 6, 2024

2 Introductions & Disclosure Rules Introductions • Frank Bozich, President & CEO • David Stasse, Executive Vice President & CFO • Bee van Kessel, Senior Vice President, Corporate Finance & Investor Relations Disclosure Rules This presentation 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 our current expectations and assumptions regarding our business, the economy, our 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 proposed restructuring initiatives, including the closure of certain plants and product lines, and to successfully generate cost savings through restructuring and cost reduction initiatives; our ability to successfully execute our business and transformation strategy; the timing of, and our ability to complete, the sale of our interest in Americas Styrenics; increased costs or disruption in the supply of raw materials; deterioration of our credit profile limiting our access to commercial credit; increased energy costs; compliance with laws and regulations impacting our business; any disruptions in production at our chemical manufacturing facilities, including those resulting from accidental spills or discharges; 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 achieve our forecasted cash flows; 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, our 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 press release are made only as of the date hereof. We undertake 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. This presentation contains financial measures that are not in accordance with generally accepted accounting principles in the US (“GAAP”) including EBITDA, Adjusted EBITDA, Adjusted Net Income, Adjusted EPS and Free Cash Flow. We believe these measures provide relevant and meaningful information to investors and lenders about the ongoing operating results and liquidity position of the Company. Such measures when referenced herein should not be viewed as an alternative to GAAP measures of performance or liquidity, as applicable. We have provided a reconciliation of these measures to the most comparable GAAP metric alongside of the respective measure or otherwise in the Appendix section and in the accompanying press release.

3 Summary Q3 2024 Results • Net loss of $87 million and EPS of negative $2.47; included pre-tax restructuring and other charges of $26 million related to recently announced restructuring initiatives • Adjusted EBITDA* of $66 million, including a $3 million favorable impact from net timing, was $25 million higher than prior year * See Appendix for a reconciliation of non-GAAP measures Cash Generation & Liquidity • Q3 cash provided by operations of $9 million led to Free Cash Flow* of negative $3 million, which included a $16 million decrease in trade working capital • Q3 ending cash of $167 million, of which $2 million is restricted, with $177 million of additional available liquidity under two committed financing facilities • Q3 cash benefit of $12 million from election of the payment-in-kind option Q4 2024 Outlook • Net loss of $81 million to $71 million • Adjusted EBITDA* of $40 million to $50 million • Sequentially lower profitability driven by year-end seasonality, with cash flow expected to turn positive due to seasonal working capital improvements Key Initiatives • Announced restructuring initiatives focused on the consolidation of business management and support function roles, which are expected to result in cost savings of $25 million in 2025 and full run rate savings of $30 million by the end of 2026 • Announced decision to exit virgin polycarbonate production at the Stade, Germany production facility • Sales of recycled-content-containing products increased 57% year-to-date

4 Europe $406 U.S. $255 Asia-Pacific $176 Rest of World $31 Q3 2024 Sales and Volume Summary Net sales in $millions Volume variances exclude styrene-related sales Europe • Lower year-over-year volumes from Polystyrene portfolio optimization to increase profitability and decrease working capital, along with weak demand in building and construction and appliances U.S. • Higher year-over-year volumes driven by Copolymers due to prior year destocking, and higher graphical paper and CASE in Latex Binders Asia • Lower year-over-year volumes from Polystyrene portfolio optimization, along with weak home appliances demand • Lower volumes in Latex Binders due to weak domestic demand in China • Higher volumes in Engineered Materials driven by strength in consumer electronics applications Net Sales Global $868 Sales Volume YoY: (8%) Sales Volume YoY: (7%) Sales Volume YoY: (22%) Sales Volume YoY: +16%

5 Trinseo Q3 2024 Financial Results $868 ($87) $879 ($38) Net Sales Net Income Net Sales & Net Income ($MM) Q3'24 Q3'23 ($2.47) ($1.62) ($1.09) ($1.03) Diluted EPS Adj EPS* EPS ($) Q3'24 Q3'23 $66 $41 Q3'24 Q3'23 Adjusted EBITDA* ($MM) Vol Price FX Total (8%) 7% (0%) (1%) Net Sales • Significant year-over-year Adjusted EBITDA improvement driven by restructuring actions, lower natural gas hedge losses, continued moderation of European input costs and a favorable net timing variance • This was partially offset by lower equity affiliate income at Americas Styrenics driven by a $10 million negative impact from unplanned outages during the quarter * See Appendix for a reconciliation of non-GAAP measures

6 Engineered Materials • Year-over-year volume increase driven by higher sales of compounds for consumer electronics applications, which improved 36% versus prior year • Adjusted EBITDA was $20 million above prior year due to higher sales, moderating input costs, and a favorable timing variance $207 $186 Q3'24 Q3'23 Net Sales ($MM) Vol Price FX Total 6% 6% (0%) 12% $25 $5 Q3'24 Q3'23 Adjusted EBITDA ($MM) 49 47 Q3'24 Q3'23 Volume (kt)

7 • Year-over-year volume decline from Asia and Europe paper and carpet applications due to weak demand; regional and application mix improved, in line with our strategy • Adjusted EBITDA was $8 million above prior year due to higher margin from the exit of styrene production in Terneuzen as well as a favorable net timing variance • Sales volumes to CASE applications increased 6% year-over-year and accounted for 12% of total segment volumes for the second consecutive quarter Latex Binders $242 $224 Q3'24 Q3'23 Net Sales ($MM) $26 $18 Q3'24 Q3'23 Adjusted EBITDA ($MM) 106 112 Q3'24 Q3'23 Volume* (kt) Vol Price FX Total (4%) 12% (0%) 8% *Volumes exclude styrene-related sales

8 Plastics Solutions • Adjusted EBITDA was $11 million above prior year due to higher margin from the exit of styrene production in Terneuzen and higher fixed cost absorption related to building inventory ahead of the Stade polycarbonate closure • Fixed cost absorption expected to reverse in the fourth quarter $268 $259 Q3'24 Q3'23 Net Sales ($MM) $28 $17 Q3'24 Q3'23 Adjusted EBITDA ($MM) 102 100 Q3'24 Q3'23 Volume* (kt) Vol Price FX Total (1%) 4% (0%) 3% *Volumes exclude styrene-related sales

9 Polystyrene • Lower year-over-year volumes due to an intentional reduction of low-margin sales to optimize plant operations and sales mix, along with weak demand in building and construction and appliances • Adjusted EBITDA was $5 million above prior year due to higher margins and lower fixed costs from the exit of styrene production in Terneuzen • 88% year-to-date increase in sales volume of recycled-content-containing polystyrene with a significant margin premium $151 $210 Q3'24 Q3'23 Net Sales ($MM) $4 ($1) Q3'24 Q3'23 Adjusted EBITDA ($MM) 90 118 Q3'24 Q3'23 Volume* (kt) Vol Price FX Total (35%) 7% (0%) (28%) *Volumes exclude styrene-related sales

10 $115 $1,794 $447 2024 2025 Senior Notes 2026 2027 2028 Term Loans 2029 Senior Notes $167 $75 $102 Debt and Liquidity Overview (as of September 30, 2024) Debt Maturity Schedule ($millions) May April Cash and Borrowing Facilities ($millions)* Revolving Credit Facility AR Securitization Cash** $344MM Combined Cash and Availability under Committed Facilities *2026 Revolving Credit Facility available funds of $102.0 million (net of $10.3 million outstanding letters of credit), as well as the Accounts Receivable Securitization Facility with borrowing capacity of $75 million. **Included restricted cash of $2.3 million September

11 (In $millions) Full Year 2024 Adjusted EBITDA* 218 - 228 Capital Expenditures (65) Cash Interest (200) Cash Taxes (20) Restructuring Cost (45) Turnarounds (10) Working Capital / Other ~40 Free Cash Flow* ~(80) 2024 Profitability and Cash Generation Outlook FY net loss of $312 million to $302 million and Adjusted EBITDA* of $218 million to $228 million Q4 net loss of $81 million to $71 million and Adjusted EBITDA* of $40 million to $50 million • Sequentially lower profitability due to year-end seasonality • Fixed cost absorption benefit in Q3 related to Stade polycarbonate closure expected to reverse in Q4 FY cash used in operations of approximately $15 million resulting in Free Cash Flow* of approximately negative $80 million • Q4 Free Cash Flow* of approximately $60 million; sequentially higher due to seasonal working capital improvements * See Appendix for a reconciliation of non-GAAP measures

12 Appendix

13 (in $millions, unless noted) Q1'22 Q2'22 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 Q4'23 Q1'24 Q2'24 Q3'24 2022 2023 Engineered Materials 60 60 50 41 46 50 47 51 50 60 49 212 194 Latex Binders 132 138 132 117 112 117 112 106 119 111 106 520 447 Plastics Solutions 134 120 100 102 109 105 100 96 108 102 102 457 409 Polystyrene 165 141 124 134 129 122 118 107 124 101 90 564 475 Trade Volume* (kt) 493 460 407 394 396 393 377 359 402 374 347 1,753 1,525 Engineered Materials 295 301 243 205 206 206 186 190 189 230 207 1,044 789 Latex Binders 309 360 343 255 249 255 224 215 241 252 242 1,267 943 Plastics Solutions 418 380 305 278 300 282 259 240 266 263 268 1,382 1,081 Polystyrene 364 384 287 237 241 220 210 192 208 175 151 1,272 863 Net Sales 1,387 1,426 1,178 975 996 963 879 837 904 920 868 4,966 3,675 Engineered Materials 35 34 8 (5) (12) 12 5 (0) 4 25 25 72 5 Latex Binders 31 32 14 16 24 23 18 18 26 26 26 93 83 Plastics Solutions 71 49 (32) (12) 24 24 17 16 23 16 28 76 81 Polystyrene 45 32 (25) 4 9 2 (1) 0 13 7 4 56 10 Americas Styrenics 22 39 23 18 18 13 19 13 6 16 4 102 62 Corporate (27) (21) (24) (16) (26) (17) (17) (27) (26) (23) (20) (88) (87) Adjusted EBITDA** 178 164 (37) 6 36 57 41 20 45 67 66 312 154 Adj EBITDA Variance Analysis Net Timing** Impacts - Fav/(Unfav) Engineered Materials (0) 0 (1) (3) (7) (9) (6) 5 (7) 2 1 (3) (17) Latex Binders 6 1 1 (3) 1 (1) (1) 0 2 (1) 1 5 (1) Plastics Solutions 15 14 (8) (4) (1) (2) 0 1 9 (7) 0 17 (1) Polystyrene 10 17 (16) (9) 5 (4) 3 (5) 9 (4) 1 2 (1) Net Timing*** Impacts - Fav/(Unfav) 32 33 (24) (19) (2) (16) (4) 1 13 (10) 3 21 (20) *Trade volume excludes styrene-related sales **See this Appendix for a reconciliation of non-GAAP measures ***Net Timing is the difference between Raw Material Timing and Price Lag. Raw Material Timing represents the timing of raw material cost changes flowing through cost of goods sold versus current pricing. Price Lag represents the difference in revenue between the current contractual price and the current period price. Segment Information

14 (in $millions, unless noted) Q1'22 Q2'22 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 Q4'23 Q1'24 Q2'24 Q3'24 2022 2023 Engineered Materials 60 60 50 41 46 50 47 51 50 60 49 212 194 Latex Binders 132 138 132 117 112 117 112 106 119 111 106 520 447 Plastics Solutions 134 120 100 102 109 105 100 96 108 102 102 457 409 Polystyrene 165 141 124 134 129 122 118 107 124 101 90 564 475 Trade Volume* (kt) 493 460 407 394 396 393 377 359 402 374 347 1,753 1,525 Engineered Materials 295 301 243 205 206 206 186 190 189 230 207 1,044 789 Latex Binders 307 354 341 255 248 254 222 215 241 252 242 1,256 939 Plastics Solutions 396 362 293 271 290 272 246 231 266 263 268 1,323 1,038 Polystyrene 318 312 248 216 209 193 175 166 208 175 151 1,093 743 Feedstocks 70 97 53 28 43 37 50 35 - - - 249 166 Net Sales 1,387 1,426 1,178 975 996 963 879 837 904 920 868 4,966 3,675 Engineered Materials 35 34 8 (5) (12) 12 5 (0) 4 25 25 72 5 Latex Binders 30 29 31 20 26 25 23 19 26 26 26 111 93 Plastics Solutions 69 46 (15) (9) 26 25 22 16 23 16 28 91 89 Polystyrene 45 23 19 12 16 6 9 2 13 7 4 99 33 Feedstocks 4 14 (78) (16) (11) (7) (19) (4) - - - (75) (41) Americas Styrenics 22 39 23 18 18 13 19 13 6 16 4 102 62 Corporate (27) (21) (24) (16) (26) (17) (17) (27) (26) (23) (20) (88) (87) Adjusted EBITDA** 178 164 (37) 6 36 57 41 20 45 67 66 312 154 Adj EBITDA Variance Analysis Net Timing** Impacts - Fav/(Unfav) Engineered Materials (0) 0 (1) (3) (7) (9) (6) 5 (7) 2 1 (3) (17) Latex Binders 3 (3) 7 (1) (0) (0) (2) 1 2 (1) 1 6 (1) Plastics Solutions 11 10 (1) (2) (2) (1) (1) 2 9 (7) 0 17 (2) Polystyrene 5 7 (6) (4) 1 (2) 2 (3) 9 (4) 1 1 (1) Feedstocks 13 19 (23) (8) 6 (4) 4 (4) - - - 1 1 Net Timing*** Impacts - Fav/(Unfav) 32 33 (24) (19) (2) (16) (4) 1 13 (10) 3 21 (20) *Trade volume excludes styrene-related sales **See this Appendix for a reconciliation of non-GAAP measures ***Net Timing is the difference between Raw Material Timing and Price Lag. Raw Material Timing represents the timing of raw material cost changes flowing through cost of goods sold versus current pricing. Price Lag represents the difference in revenue between the current contractual price and the current period price. Segment Information – Excluding Feedstocks Recast

15 (in $millions, unless noted) Q1'22 Q2'22 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 Q4'23 Q1'24 Q2'24 Q3'24 2022 2023 Net Income (Loss) 16.7 37.4 (119.8) (365.3) (48.9) (349.0) (38.4) (265.0) (75.5) (67.8) (87.3) (430.9) (701.3) Net Income (Loss) from discontinued operations (0.4) 0.3 (1.9) (1.0) - - - - - - - (2.9) 0.0 Net Income (Loss) from continuing operations 17.1 37.1 (117.9) (364.3) (48.9) (349.0) (38.4) (265.0) (75.5) (67.8) (87.3) (428.0) (701.3) Interest expense, net 21.9 25.4 30.4 35.3 38.3 40.2 46.6 63.3 63.0 64.7 72.3 112.9 188.4 Provision for (benefit from) income taxes 22.6 30.8 (12.1) (83.0) (16.7) (25.1) (17.7) 127.9 5.4 20.3 3.4 (41.6) 68.4 Depreciation and amortization 53.0 48.1 45.9 89.8 56.0 52.5 38.2 74.4 45.0 46.6 48.3 236.9 221.2 EBITDA 114.6 141.4 (53.7) (322.2) 28.7 (281.4) 28.7 0.6 37.9 63.8 36.7 (119.8) (223.3) Other items 23.4 22.1 14.8 11.0 3.6 2.6 7.2 8.0 1.3 2.5 0.9 71.2 21.4 Restructuring and other charges 0.4 (1.5) - 17.0 3.7 1.5 13.8 12.5 9.4 4.0 28.5 15.9 31.5 Net gain on disposition of businesses and assets (0.3) (1.5) - - - (16.3) (9.3) 0.0 (3.6) (3.5) - (1.8) (25.6) Acquisition transaction and integration net costs 3.2 2.7 0.4 0.4 - 0.1 - (1.5) - - - 6.6 (1.4) Acquisition purchase price hedge loss (gain) - - - - - - - - - - - - - European Commission request for information 35.6 - - 0.6 - - - - - - - 36.2 - Goodwill impairment charges - - - 297.1 - 349.0 - - - - - 297.1 349.0 Asset impairment charges or write-offs 0.7 1.3 1.9 2.4 0.3 1.3 0.5 0.6 - - - 6.3 2.7 Adjusted EBITDA 177.6 164.5 (36.6) 6.3 36.3 56.8 40.9 20.2 45.0 66.8 66.1 311.7 154.3 Adjusted EBITDA to Adjusted Net Income Adjusted EBITDA 177.6 164.5 (36.6) 6.3 36.3 56.8 40.9 20.2 45.0 66.8 66.1 311.7 154.3 Interest expense, net 21.9 25.4 30.4 35.3 38.3 40.2 46.6 63.3 63.0 64.7 72.3 112.9 188.4 Provision for (benefit from) income taxes - Adjusted 25.6 25.7 (9.6) (18.8) (20.0) 34.8 (18.6) 12.1 4.2 5.9 3.5 22.8 8.3 Depreciation and amortization - Adjusted 50.9 47.2 45.1 49.9 53.3 49.5 49.2 50.0 46.3 47.9 47.8 193.1 202.0 Adjusted Net Income (Loss) 79.3 66.2 (102.5) (60.1) (35.3) (67.7) (36.3) (105.2) (68.5) (51.7) (57.5) (17.1) (244.4) Wtd Avg Shares - Diluted (000) 38,139 36,996 35,176 34,974 35,032 35,153 35,191 35,200 35,250 35,307 35,360 35,941 35,274 Adjusted EPS - Diluted ($) 2.08 1.79 (2.91) (1.72) (1.01) (1.92) (1.03) (2.99) (1.94) (1.46) (1.62) (0.48) (6.93) Adjustments by Statement of Operations Caption Loss on extinguishment of long-term debt - - - - - - - - - - 0.6 0.0 0.0 Cost of sales - - - - - 1.2 0.4 5.5 - - - 0.0 7.1 SG&A 27.0 22.9 16.0 28.4 7.3 (12.1) 15.4 13.5 7.1 6.5 29.6 94.3 24.1 Impairment and other charges 36.3 1.3 1.9 300.1 0.3 349.1 - 0.6 - - - 339.6 350.0 Acquisition purchase price hedge (gain) loss - - - - - - - - - - - 0.0 0.0 Other expense (income), net (0.3) (1.1) (0.8) - - - (3.6) - - (3.5) (0.8) (2.2) (3.6) Total EBITDA Adjustments 63.0 23.1 17.1 328.5 7.6 338.2 12.2 19.6 7.1 3.0 29.4 431.7 377.6 Free Cash Flow Reconciliation Cash provided by (used in) operating activities (5.0) (83.0) 97.6 33.9 45.4 56.5 29.3 17.5 (66.2) (41.9) 8.8 43.5 148.7 Capital expenditures (24.8) (31.5) (38.5) (54.2) (21.8) (13.8) (13.5) (20.6) (15.7) (14.2) (12.2) (149.0) (69.7) Free Cash Flow (29.8) (114.5) 59.1 (20.3) 23.6 42.7 15.8 (3.1) (81.9) (56.1) (3.4) (105.5) 79.0 US GAAP to Non-GAAP Reconciliation NOTE: For definitions of non-GAAP measures as well as descriptions of current period reconciling items from Net Income to Adjusted EBITDA and to Adjusted Net Income, refer to the accompanying press release furnished as Exhibit 99.1 to our Form 8-K dated November 6, 2024. Totals may not sum due to rounding.

16 Quarter Ended Year Ended (In $millions, unless noted) Dec 31, 2024 Dec 31, 2024 Adjusted EBITDA 40 - 50 218 - 228 Interest expense, net 68 268 Provision for income taxes 5 34 Depreciation and amortization 48 188 Reconciling items to Adjusted EBITDA(1) 0 40 Net Income (loss) (81) - (71) (312) - (302) Reconciling items to Adjusted Net Income (Loss) (1) 0 (53) Adjusted Net Income (Loss) (81) - (71) (259) - (249) Weighted avg shares - diluted (MM) 35.3 35.3 EPS - diluted ($) (2.29) - (2.01) (8.82) - (8.54) Adjusted EPS ($) (2.29) - (2.01) (7.31) - (7.03) Quarter Ended Year Ended Dec 31, 2024 Dec 31, 2024 Cash from Operations 83 (15) Capital Expenditures (23) (65) Free Cash Flow 60 (80) US GAAP to Non-GAAP Reconciliation Profitability Outlook (1) Reconciling items to Adjusted EBITDA and Adjusted Net Income (Loss) are not typically forecasted by the Company based on their nature as being primarily driven by transactions that are not part of the core operations of the business and, as a result, cannot be estimated without unreasonable cost or uncertainty. For potential reconciling items to Adjusted EBITDA and Adjusted Net Income (Loss) during 2024 are not reflected. NOTE: For definitions of non-GAAP measures as well as descriptions of current period reconciling items from Net Income (Loss) to Adjusted EBITDA and to Adjusted Net Income (Loss), refer to the accompanying press release furnished as Exhibit 99.1 to our Form 8-K dated November 6, 2024. Totals may not sum due to rounding. Cash Outlook

Document and Entity Information	Nov. 06, 2024
Cover [Abstract]
Document Type	8-K
Document Period End Date	Nov. 06, 2024
Entity File Number	001-36473
Entity Registrant Name	Trinseo PLC
Entity Incorporation, State or Country Code	L2
Entity Tax Identification Number	00-0000000
Entity Address, Address Line One	440 East Swedesford Road
Entity Address, Adress Line Two	Suite 301
Entity Address, City or Town	Wayne
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19087
City Area Code	610
Local Phone Number	240-3200
Written Communications	false
Soliciting Material	false
Pre-commencement Tender Offer	false
Pre-commencement Issuer Tender Offer	false
Title of 12(b) Security	Ordinary Shares, par value $0.01 per share
Trading Symbol	TSE
Security Exchange Name	NYSE
Entity Emerging Growth Company	false
Entity Central Index Key	0001519061
Amendment Flag	false