10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)                                                                                                                                                                                         

☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2022

or

☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934

For the transition period from                      to                     

Commission File Number: 001-36473

Trinseo PLC

(Exact name of registrant as specified in its charter)

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

1000 Chesterbrook Boulevard

Suite 300

Berwyn, PA 19312

(Address of Principal Executive Offices)

(610) 240-3200

(Registrant’s telephone number)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒    No   ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	◻
Non-accelerated filer	◻	Smaller reporting company	☐	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. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☒

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

As of August 5, 2022, there were 34,972,646 of the registrant’s ordinary shares outstanding.

TABLE OF CONTENTS

`
		Page
Part I	Financial Information
Item 1.	Financial Statements	4
	Condensed Consolidated Balance Sheets as of June 30, 2022 and December 31, 2021 (Unaudited)	4
	Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2022 and 2021 (Unaudited)	5
	Condensed Consolidated Statements of Comprehensive Income (Loss) for the three and six months ended June 30, 2022 and 2021 (Unaudited)	6
	Condensed Consolidated Statements of Shareholders’ Equity for the three and six months ended June 30, 2022 and 2021 (Unaudited)	7
	Condensed Consolidated Statements of Cash Flows for the three and six months ended June 30, 2022 and 2021 (Unaudited)	8
	Notes to Condensed Consolidated Financial Statements (Unaudited)	9
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	32
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	47
Item 4.	Controls and Procedures	47
Part II	Other Information
Item 1.	Legal Proceedings	47
Item 1A.	Risk Factors	48
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	49
Item 3.	Defaults Upon Senior Securities	50
Item 4.	Mine Safety Disclosures	50
Item 5.	Other Information	50
Item 6.	Exhibits	50
Exhibit Index
Signatures

2

Trinseo PLC

Quarterly Report on Form 10-Q

For the quarterly period ended June 30, 2022

Unless otherwise indicated or required by context, as used in this Quarterly Report on Form 10-Q (“Quarterly Report”), the term “Trinseo” refers to Trinseo PLC (NYSE: TSE), a public limited company existing under the laws of Ireland, and not its subsidiaries. The terms “Company,” “we,” “us” and “our” refer to Trinseo and its consolidated subsidiaries, taken as a consolidated entity. Trinseo PLC is the surviving entity of a cross-border merger with our predecessor company, Trinseo S.A., which merger was approved by shareholders in June 2021 and completed in October 2021. All financial data provided in this Quarterly Report is the financial data of Trinseo PLC, unless otherwise indicated. Prior to the formation of the Company, our business was wholly owned by The Dow Chemical Company (together with other affiliates, “Dow”). The Company may distribute cash to shareholders under Irish law via dividends or distributions made out of distributable profits.

Definitions of capitalized terms not defined herein appear within our Annual Report on Form 10-K for the year ended December 31, 2021 (“Annual Report”) filed with the Securities and Exchange Commission (“SEC”) on February 23, 2022.

Cautionary Note on Forward-Looking Statements

This Quarterly Report contains, 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. Forward-looking statements may be identified by the use of words like “expect,” “anticipate,” “intend,” “forecast,” ”estimate,” “see,” “outlook,” “will,” “may,” “might,” “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 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.

Specific factors that may impact performance or other predictions of future actions have, in many but not all cases, been identified in connection with specific forward-looking statements. Factors that might cause such a difference include, but are not limited to, our ability to successfully execute our transformation strategy and business strategy; our ability to integrate acquired businesses; global supply chain volatility, increased costs or disruption in the supply of raw materials; increased energy costs or costs for transportation of our products; the outcome of the European Commission request for information; the nature of investment opportunities presented to the Company from time to time; and those discussed in our Annual Report filed with the SEC on February 23, 2022 under Part I, Item IA— “Risk Factors,” within this Quarterly Report and in other filings and furnishings made by the Company with the SEC 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. They are neither statements of historical fact nor guarantees or assurances of future performance. Therefore, we caution you against relying on these forward-looking statements. The forward-looking statements included in this Quarterly Report 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.

Available Information

Our annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, are available free of charge through the Investor Relations section of our website, www.trinseo.com, as soon as reasonably practicable after the reports are electronically filed or furnished with the SEC. We provide this website and information contained in or connected to it for informational purposes only. That information is not a part of this Quarterly Report.

3

PART I —FINANCIAL INFORMATION

Item 1. Financial Statements

TRINSEO PLC

Condensed Consolidated Balance Sheets

(In millions, except per share data)

(Unaudited)

	June 30,		December 31,
	2022		2021
Assets
Current assets
Cash and cash equivalents	$	264.4	$	573.0
Accounts receivable, net of allowance for doubtful accounts (June 30, 2022: $6.0; December 31, 2021: $4.1)		849.5		740.2
Inventories		759.7		621.0
Other current assets		36.2		44.3
Total current assets		1,909.8		1,978.5
Investments in unconsolidated affiliates		271.4		247.8
Property, plant and equipment, net of accumulated depreciation (June 30, 2022: $580.3; December 31, 2021: $556.5)		665.3		719.0
Other assets
Goodwill		709.4		710.1
Other intangible assets, net		785.3		823.8
Right-of-use assets - operating, net		82.5		85.3
Deferred income tax assets		56.9		77.6
Deferred charges and other assets		57.5		70.1
Total other assets		1,691.6		1,766.9
Total assets	$	4,538.1	$	4,712.2
Liabilities and shareholders’ equity
Current liabilities
Short-term borrowings and current portion of long-term debt	$	17.7	$	18.5
Accounts payable		561.7		590.3
Current lease liabilities - operating		18.6		18.4
Income taxes payable		32.3		52.1
Accrued expenses and other current liabilities		229.0		235.1
Total current liabilities		859.3		914.4
Noncurrent liabilities
Long-term debt, net of unamortized deferred financing fees		2,302.3		2,305.6
Noncurrent lease liabilities - operating		66.1		69.2
Deferred income tax liabilities		101.8		103.2
Other noncurrent obligations		284.0		306.7
Total noncurrent liabilities		2,754.2		2,784.7
Commitments and contingencies (Note 13)
Shareholders’ equity
Ordinary shares, $0.01 nominal value, 4,000.0 shares authorized (June 30, 2022: 39.2 shares issued and 36.3 shares outstanding; December 31, 2021: 38.9 shares issued and 37.9 shares outstanding)		0.4		0.4
Preferred shares, €0.01 nominal value, 1,000.0 shares authorized (no shares issued or outstanding)		—		—
Deferred ordinary shares, €1.00 nominal value, 0.025 shares authorized (June 30, 2022: 0.025 shares issued and outstanding; December 31, 2021: 0.025 shares issued and outstanding)		—		—
Additional paid-in-capital		480.1		468.1
Treasury shares, at cost (June 30, 2022: 2.9 shares; December 31, 2021: 1.0 shares)		(150.0)		(50.0)
Retained earnings		772.0		741.8
Accumulated other comprehensive loss		(177.9)		(147.2)
Total shareholders’ equity		924.6		1,013.1
Total liabilities and shareholders’ equity	$	4,538.1	$	4,712.2

The accompanying notes are an integral part of these condensed consolidated financial statements.

4

TRINSEO PLC

Condensed Consolidated Statements of Operations

(In millions, except per share data)

(Unaudited)

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Net sales	$	1,425.5	$	1,273.7	$	2,812.2	$	2,259.7
Cost of sales		1,286.4		1,053.7		2,497.1		1,850.8
Gross profit		139.1		220.0		315.1		408.9
Selling, general and administrative expenses		85.6		97.3		182.3		153.8
Equity in earnings of unconsolidated affiliates		39.4		30.1		61.0		53.0
Other charges		1.3		1.8		37.6		1.8
Operating income		91.6		151.0		156.2		306.3
Interest expense, net		25.4		21.6		47.3		33.6
Acquisition purchase price hedge (gain) loss		—		(33.0)		—		22.0
Other expense (income), net		(1.7)		6.1		1.3		8.5
Income from continuing operations before income taxes		67.9		156.3		107.6		242.2
Provision for income taxes		30.8		23.3		53.4		43.4
Net income from continuing operations		37.1		133.0		54.2		198.8
Net income from discontinued operations, net of income taxes		0.3		18.6		—		24.3
Net income	$	37.4	$	151.6	$	54.2	$	223.1
Weighted average shares- basic		36.3		38.8		36.8		38.6
Net income per share- basic:
Continuing operations	$	1.02	$	3.43	$	1.47	$	5.15
Discontinued operations		0.01		0.48		—		0.62
Net income per share- basic	$	1.03	$	3.91	$	1.47	$	5.77
Weighted average shares- diluted		37.0		39.6		37.6		39.6
Net income per share- diluted:
Continuing operations	$	1.00	$	3.35	$	1.44	$	5.02
Discontinued operations		0.01		0.47		—		0.61
Net income per share- diluted	$	1.01	$	3.82	$	1.44	$	5.63

The accompanying notes are an integral part of these condensed consolidated financial statements.

5

TRINSEO PLC

Condensed Consolidated Statements of Comprehensive Income (Loss)

(In millions)

(Unaudited)

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Net income	$	37.4	$	151.6	$	54.2	$	223.1
Other comprehensive income (loss), net of tax:
Cumulative translation adjustments (net of tax of $3.9, $0.0, $3.9, $0.0)		(34.8)		(0.7)		(39.1)		(0.3)
Net gain (loss) on cash flow hedges (net of tax of $0.6, $0.0, $0.6, $0.0)		0.3		(0.2)		1.8		4.4
Pension and other postretirement benefit plans:
Net gain arising during period (net of tax of $0.9, $0.0, $0.9, $0.0)		7.7		—		7.7		—
Amounts reclassified from accumulated other comprehensive income		(1.4)		1.0		(1.1)		2.1
Total other comprehensive income (loss), net of tax		(28.2)		0.1		(30.7)		6.2
Comprehensive income	$	9.2	$	151.7	$	23.5	$	229.3

The accompanying notes are an integral part of these condensed consolidated financial statements.

6

TRINSEO PLC

Condensed Consolidated Statements of Shareholders’ Equity

(In millions, except per share data)

(Unaudited)

	Shares			Shareholders' Equity
	Ordinary Shares Outstanding	Treasury Shares	Deferred Ordinary Shares	Ordinary Shares		Deferred Ordinary Shares		Additional Paid-In Capital		Treasury Shares		Accumulated Other Comprehensive Income (Loss)		Retained Earnings		Total
Balance at December 31, 2021	37.9	1.0	—	$	0.4	$	—	$	468.1	$	(50.0)	$	(147.2)	$	741.8	$	1,013.1
Net income	—	—	—		—		—		—		—		—		16.7		16.7
Other comprehensive loss	—	—	—		—		—		—		—		(2.5)		—		(2.5)
Share-based compensation activity	0.2	—	—		—		—		7.6		—		—		—		7.6
Purchase of treasury shares	(0.9)	0.9			—				—		(50.0)		—		—		(50.0)
Dividends on ordinary shares ($0.32 per share)	—	—	—		—		—		—		—		—		(12.1)		(12.1)
Balance at March 31, 2022	37.2	1.9	—	$	0.4	$	—	$	475.7	$	(100.0)	$	(149.7)	$	746.4	$	972.8
Net income	—	—	—		—		—		—		—		—		37.4		37.4
Other comprehensive loss	—	—	—		—		—		—		—		(28.2)		—		(28.2)
Share-based compensation activity	0.1	—	—		—		—		4.4		—		—		—		4.4
Purchase of treasury shares	(1.0)	1.0			—				—		(50.0)		—		—		(50.0)
Dividends on ordinary shares ($0.32 per share)	—	—	—		—		—		—		—		—		(11.8)		(11.8)
Balance at June 30, 2022	36.3	2.9	—	$	0.4	$	—	$	480.1	$	(150.0)	$	(177.9)	$	772.0	$	924.6

	Shares			Shareholders' Equity
	Ordinary Shares Outstanding	Treasury Shares	Deferred Ordinary Shares	Ordinary Shares		Deferred Ordinary Shares		Additional Paid-In Capital		Treasury Shares		Accumulated Other Comprehensive Income (Loss)		Retained Earnings		Total
Balance at December 31, 2020	38.4	10.4	—	$	0.5		—	$	579.6	$	(542.9)	$	(186.1)	$	739.2	$	590.3
Net income	—	—	—		—		—		—		—		—		71.5		71.5
Other comprehensive income	—	—	—		—		—		—		—		6.1		—		6.1
Share-based compensation activity	0.3	(0.3)	—		—		—		(1.1)		12.9		—		—		11.8
Dividends on ordinary shares ($0.08 per share)	—	—	—		—		—		—		—		—		(3.4)		(3.4)
Balance at March 31, 2021	38.7	10.1	—	$	0.5		—	$	578.5	$	(530.0)	$	(180.0)	$	807.3	$	676.3
Net income	—	—	—		—		—		—		—		—		151.6		151.6
Other comprehensive income	—	—	—		—		—		—		—		0.1		—		0.1
Share-based compensation activity	0.1	(0.1)	—		—		—		0.2		4.7		—		—		4.9
Dividends on ordinary shares ($0.08 per share)	—	—	—		—		—		—		—		—		(3.1)		(3.1)
Balance at June 30, 2021	38.8	10.0	—	$	0.5		—	$	578.7	$	(525.3)	$	(179.9)	$	955.8	$	829.8

The accompanying notes are an integral part of these condensed consolidated financial statements.

7

TRINSEO PLC

Condensed Consolidated Statements of Cash Flows

(In millions)

(Unaudited)

	Six Months Ended
	June 30,
	2022		2021
Cash flows from operating activities
Net income	$	54.2	$	223.1
Less: Net income from discontinued operations		—		24.3
Net income from continuing operations		54.2		198.8
Adjustments to reconcile net income from continuing operations to net cash provided by (used in) operating activities - continuing operations
Depreciation and amortization		101.1		61.2
Amortization of deferred financing fees and issuance discount		4.6		3.2
Deferred income tax		9.8		3.6
Share-based compensation expense		12.2		7.0
Earnings of unconsolidated affiliates, net of dividends		(23.5)		(13.1)
Unrealized net gain on foreign exchange forward contracts		(4.5)		(31.5)
Acquisition purchase price hedge loss		—		22.0
Pension curtailment and settlement gain		(1.7)		—
Gain on sale of businesses and other assets		(1.8)		(0.2)
Asset impairment charges or write-offs		2.0		1.8
Changes in assets and liabilities
Accounts receivable		(135.1)		(296.2)
Inventories		(166.7)		(167.6)
Accounts payable and other current liabilities		15.8		199.7
Income taxes payable		(17.4)		16.2
Other assets, net		20.9		(8.9)
Other liabilities, net		41.2		22.1
Cash provided by (used in) operating activities - continuing operations		(88.9)		18.1
Cash provided by operating activities - discontinued operations		0.8		11.9
Cash provided by (used in) operating activities		(88.1)		30.0
Cash flows from investing activities
Capital expenditures		(55.4)		(30.0)
Cash paid for asset or business acquisitions, net of cash acquired ($1.0 and $10.4)		(22.2)		(1,358.6)
Proceeds from the sale of businesses and other assets		5.3		0.2
Proceeds from (payments for) the settlement of hedging instruments		1.9		(14.7)
Cash used in investing activities - continuing operations		(70.4)		(1,403.1)
Cash used in investing activities - discontinued operations		(0.8)		(2.4)
Cash used in investing activities		(71.2)		(1,405.5)
Cash flows from financing activities
Deferred financing fees		—		(35.0)
Short-term borrowings, net		(7.5)		(6.2)
Purchase of treasury shares		(101.9)		—
Dividends paid		(24.6)		(6.4)
Proceeds from exercise of option awards		2.9		10.5
Withholding taxes paid on restricted share units		(2.5)		(0.8)
Repayments of 2024 Term Loan B and 2028 Term Loan B		(7.2)		(3.5)
Net proceeds from issuance of 2028 Term Loan B		—		746.3
Net proceeds from issuance of 2029 Senior Notes		—		450.0
Cash provided by (used in) financing activities		(140.8)		1,154.9
Effect of exchange rates on cash		(8.5)		(1.1)
Net change in cash, cash equivalents, and restricted cash		(308.6)		(221.7)
Cash, cash equivalents, and restricted cash—beginning of period		573.0		588.7
Cash, cash equivalents, and restricted cash—end of period	$	264.4	$	367.0
Less: Restricted cash		—		—
Cash and cash equivalents—end of period	$	264.4	$	367.0

The accompanying notes are an integral part of these condensed consolidated financial statements.

8

TRINSEO PLC

Notes to Condensed Consolidated Financial Statements

(Dollars in millions, unless otherwise stated)

(Unaudited)

NOTE 1—BASIS OF PRESENTATION

The unaudited interim condensed consolidated financial statements of Trinseo PLC and its subsidiaries (the “Company”) as of and for the periods ended June 30, 2022 and 2021 were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and reflect all adjustments, consisting only of normal recurring adjustments, which, in the opinion of management, are considered necessary for the fair statement of the results for the periods presented. Because they cover interim periods, the statements and related notes to the financial statements do not include all disclosures normally provided in annual financial statements, and therefore, these statements should be read in conjunction with the 2021 audited consolidated financial statements included within the Company’s Annual Report on Form 10-K (“Annual Report”) filed with the Securities and Exchange Commission (“SEC”) on February 23, 2022. The Company’s condensed consolidated financial statements presented herein reflect the latest estimates and assumptions made by management that affect the reported amounts and related disclosures as of and for the period ended June 30, 2022. However, actual results could differ from these estimates and assumptions.

The December 31, 2021 condensed consolidated balance sheet data presented herein was derived from the Company’s December 31, 2021 audited consolidated financial statements, but does not include all disclosures required by GAAP for annual periods.

Certain prior year amounts have been reclassified to conform to the current year presentation. Throughout this Quarterly Report, unless otherwise indicated, amounts and activity are presented on a continuing operations basis.

NOTE 2—RECENT ACCOUNTING GUIDANCE

As of June 30, 2022, there was no recently issued accounting standards which would have a material effect on the Company’s condensed consolidated financial statements.

NOTE 3—ACQUISITIONS

Acquisition of Heathland B.V.

On January 3, 2022, the Company completed the acquisition of Heathland B.V. (“Heathland”) from Heathland Holding B.V. (“Heathland Holding”), through the purchase of all issued and outstanding shares (the “Heathland Acquisition”). The Heathland Acquisition was completed pursuant to the Sale and Purchase Agreement dated December 3, 2021 (“Heathland Agreement”), by and between the Company and Heathland Holding. Heathland is a leading collector and recycler of post-consumer and post-industrial plastic wastes in Europe. The total purchase price consideration is estimated to be $29.3 million, including an initial cash purchase price of $22.9 million, as well as $6.4 million of contingent cash consideration, representing the fair value of certain earn-out payments. The maximum amount of potential earn-out payments is $6.8 million, which amounts will become payable to Heathland Holding as and when the related performance milestones or thresholds are achieved over the three-year period following the date of acquisition. The Heathland Acquisition was funded through existing cash on hand.

9

Additionally, the Heathland Agreement includes a service fee of approximately $4.5 million, payable to Heathland Holdings contingent upon the continued employment of certain Heathland employees for three years following the acquisition date. The Company has not included this service fee as part of the estimated purchase price and instead will accrue for the service fee as compensation expense over the three-year period in which it is earned.

The Company accounted for the acquisition as a business combination pursuant to ASC 805. In accordance with ASC 805, fair values are assigned to tangible and identifiable intangible assets acquired and liabilities assumed at the acquisition date based on the information that was available as of the acquisition date.

The Company allocated the purchase price of the acquisition to identifiable assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. The excess of the purchase price over the aggregate fair values was recorded as goodwill. During the second quarter of 2022, there were no material changes to the purchase price allocation for the Heathland acquisition.

The table below summarizes the purchase price allocation for the assets acquired and liabilities assumed, based on their relative fair values, which have been assessed as of the January 3, 2022 acquisition date:

	January 3,
	2022
Cash and cash equivalents	$	1.0
Other current assets		1.2
Other intangible assets (1)
Customer relationships		5.1
Tradenames		0.9
Developed technology		0.2
Other assets		1.0
Total fair value of assets acquired		9.4
Current liabilities		(1.3)
Noncurrent liabilities		(1.6)
Total fair value of liabilities assumed		(2.9)
Net identifiable assets acquired		6.5
Purchase price consideration		29.3
Goodwill (2)	$	22.8

(1) The expected weighted average useful life of the acquired intangible assets are 7 years for customer relationships, tradenames and developed technology.

(2) Goodwill largely consists of strategic and synergistic opportunities resulting from combining Heathland with the Company’s existing businesses and is allocated entirely to the Base Plastics segment. No goodwill related to this acquisition is expected to be deductible for income tax purposes.

Pro forma results of operations information have not been presented as the effect of the acquisition is not material. The operating results of the Heathland acquisition are included within the Company's condensed consolidated statements of operations since the acquisition date of January 3, 2022 and were not material for the three and six months ended June 30, 2022. Pursuant to GAAP, costs incurred to complete the Heathland Acquisition as well as costs incurred to integrate into the Company’s operations are expensed as incurred. Transaction-related costs incurred, which are included within “Selling, general, and administrative expenses” in the condensed consolidated statements of operations, were not material for the three and six months ended June 30, 2022.

Acquisition of Aristech Surfaces

On September 1, 2021, the Company completed its previously announced acquisition of Aristech Surfaces LLC (“Aristech Surfaces”) from SK AA Holdings LLC (“SK AA Holdings”), the sole member of Aristech Surfaces, through purchase of 100% membership interest and intellectual property (the “Aristech Surfaces Acquisition”). The purchase

10

price consideration for the Aristech Surfaces Acquisition was $449.5 million, all of which was paid during the year ended December 31, 2021 (noting no cash flows during the six months ended June 30, 2021). Aristech Surfaces is a leading North America manufacturer and global provider of PMMA continuous cast and solid surface sheets, serving the wellness, architectural, transportation and industrial markets, whose results are included within the Engineered Materials segment. Aristech Surfaces’ products are used for a variety of applications, including the construction of hot tubs, swim spas, counter tops, signage, bath products and recreational vehicles.

The Company allocated the purchase price of the acquisition to identifiable assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. Refer to the Annual Report for further information. During the second quarter of 2022, there were no changes to the purchase price allocation for the acquisition of the Aristech Surfaces business. However, further adjustments may be necessary as a result of the Company’s on-going assessment of additional information that existed as of the acquisition date related to the fair value of assets acquired and liabilities assumed, including goodwill, during the measurement period.

Acquisition of the PMMA Business

On May 3, 2021, the Company completed its previously-announced acquisition of the polymethyl methacrylates (“PMMA”) and activated methyl methacrylates (“MMA”) business (together, the “PMMA business”) from Arkema S.A., (“Arkema”) through the purchase of 100% of the shares of certain subsidiaries of Arkema (the “PMMA Acquisition”). The purchase price consideration for the PMMA Acquisition was $1,364.9 million, all of which was paid during the year ended December 31, 2021 (of which $1,358.6 million was paid during the six months ended June 30, 2021). PMMA is a transparent and rigid plastic with a wide range of end uses, and is an attractive adjacent chemistry which complements Trinseo’s existing offerings across several end markets including automotive, building & construction, medical and consumer electronics. PMMA results are included within the Engineered Materials segment.

The Company allocated the purchase price of the acquisition to identifiable assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. Refer to the Annual Report for further information. During the six months ended June 30, 2022, there were no changes to the purchase price allocation for the acquisition of the PMMA business. As of June 30, 2022, the acquisition measurement period for the PMMA business has ended and the values assigned to the assets acquired and liabilities assumed are final.

Unaudited Pro Forma Financial Information

The following unaudited pro forma financial information presents the consolidated results of operations of the Company with the PMMA business and Aristech Surfaces for the three and six months ended June 30, 2021 as if these acquisitions had occurred on January l, 2021. The pro forma results were calculated by combining the results of Trinseo with the PMMA business and Aristech Surfaces but do not include adjustments related to cost savings or other synergies that are anticipated as a result of these acquisitions. Accordingly, these unaudited pro forma results are presented for informational purposes only and are not necessarily indicative of what the actual results of operations would have been if the acquisitions had occurred as of January 1, 2021, nor are they indicative of future results of operations.

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2021		2021
Net sales	$	1,369.4	$	2,563.6
Net income	$	185.5	$	261.1
Income from continuing operations	$	166.9	$	236.8

NOTE 4—DIVESTITURES AND DISCONTINUED OPERATIONS

On December 1, 2021, the Company completed the divestiture of its Synthetic Rubber business to Synthos S.A. and certain of its subsidiaries (together, “Synthos”) for a purchase price of $402.4 million, which reflected a reduction of approximately $41.6 million for the assumption of pension liabilities by Synthos and $47.0 million for net working capital (excluding inventory) retained by Trinseo. Refer to the Annual Report for further information. At closing, the

11

Company and Synthos executed a long-term supply agreement, in which Trinseo will supply Synthos certain raw materials used in the Synthetic Rubber business subsequent to the sale. For the three and six months ended June 30, 2022, the Company recorded $22.7 million and $41.8 million, respectively, in net sales, and $15.6 million and $31.8 million, respectively, in cost of sales related to the supply agreement, which is recorded in continuing operations.

The following table summarizes the results of the Synthetic Rubber business for the three and six months ended June 30, 2022 and 2021, which are reflected as discontinued operations in the Company’s condensed consolidated statements of operations:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Net sales	$	—	$	135.7	$	0.1	$	259.9
Cost of sales		0.8		108.2		1.4		219.3
Gross profit (loss)		(0.8)		27.5		(1.3)		40.6
Selling, general and administrative expenses		(0.1)		5.6		(0.3)		11.8
Operating income (loss)		(0.7)		21.9		(1.0)		28.8
Gain on sale of businesses and other assets		1.2		—		1.2		—
Other expense, net		—		0.8		—		1.0
Income from discontinued operations before income taxes		0.5		21.1		0.2		27.8
Provision for income taxes		0.2		2.5		0.2		3.5
Net income from discontinued operations	$	0.3	$	18.6	$	—	$	24.3

NOTE 5—NET SALES

Refer to the Annual Report for information on the Company's accounting policies and further background related to its net sales.

The following table provides disclosure of net sales to external customers by primary geographical market (based on the location where sales originated), by segment for the three and six months ended June 30, 2022 and 2021.

	Engineered		Latex		Base
Three Months Ended	Materials		Binders		Plastics		Polystyrene		Feedstocks		Total
June 30, 2022
United States	$	150.7	$	102.5	$	106.1	$	—	$	4.6	$	363.9
Europe		108.9		169.4		198.5		215.9		92.0		784.7
Asia-Pacific		38.2		79.3		31.6		96.0		—		245.1
Rest of World		3.5		2.5		25.7		0.1		—		31.8
Total	$	301.3	$	353.7	$	361.9	$	312.0	$	96.6	$	1,425.5
June 30, 2021
United States	$	60.9	$	74.1	$	71.6	$	—	$	3.3	$	209.9
Europe		80.3		160.5		253.8		199.8		68.0		762.4
Asia-Pacific		37.8		74.3		51.9		113.5		—		277.5
Rest of World		2.0		2.3		19.6		—		—		23.9
Total	$	181.0	$	311.2	$	396.9	$	313.3	$	71.3	$	1,273.7

12

	Engineered		Latex		Base
Six Months Ended	Materials		Binders		Plastics		Polystyrene		Feedstocks		Total
June 30, 2022
United States	$	289.1	$	184.7	$	190.6	$	—	$	8.5	$	672.9
Europe		227.6		320.3		445.1		430.5		158.4		1,581.9
Asia-Pacific		73.5		151.0		68.8		199.4		—		492.7
Rest of World		6.3		4.4		53.9		0.1		—		64.7
Total	$	596.5	$	660.4	$	758.4	$	630.0	$	166.9	$	2,812.2
June 30, 2021
United States	$	71.1	$	141.9	$	134.2	$	—	$	6.7	$	353.9
Europe		101.4		278.1		451.7		349.0		138.1		1,318.3
Asia-Pacific		72.1		138.1		100.6		231.1		—		541.9
Rest of World		2.2		4.1		39.3		—		—		45.6
Total	$	246.8	$	562.2	$	725.8	$	580.1	$	144.8	$	2,259.7

NOTE 6—INVESTMENTS IN UNCONSOLIDATED AFFILIATES

The Company is currently supplemented by one joint venture, Americas Styrenics LLC (“Americas Styrenics,” a styrene and polystyrene joint venture with Chevron Phillips Chemical Company LP), which is accounted for using the equity method. The results of Americas Styrenics are included within its own reporting segment.

Americas Styrenics is a privately held company; therefore, a quoted market price for its equity interests is not available. The summarized financial information of the Company’s unconsolidated affiliate is shown below.

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Sales	$	594.6	$	495.6	$	1,119.0	$	918.5
Gross profit	$	93.5	$	74.5	$	141.6	$	139.9
Net income	$	80.1	$	63.6	$	116.2	$	114.6

As of June 30, 2022 and December 31, 2021, the Company’s investment in Americas Styrenics was $271.4 million and $247.8 million, respectively, which was $12.3 million and $9.4 million greater than the Company’s 50% share of the underlying net assets of Americas Styrenics, respectively. This amount represents the difference between the book value of assets held by the joint venture and the Company’s 50% share of the total recorded value of the joint venture’s assets, inclusive of certain adjustments to conform with the Company’s accounting policies. This difference is being amortized over a weighted average remaining useful life of approximately 2.5 years as of June 30, 2022. The Company received dividends of $30.0 million and $37.5 million from Americas Styrenics during the three and six months ended June 30, 2022, respectively, and $25.0 million and $40.0 million during the three and six months ended June 30, 2021, respectively.

NOTE 7—INVENTORIES

Inventories consisted of the following:

	June 30,		December 31,
	2022		2021
Finished goods	$	352.9	$	279.2
Raw materials and semi-finished goods		370.1		303.9
Supplies		36.7		37.9
Total	$	759.7	$	621.0

13

NOTE 8—DEBT

Refer to the Annual Report for definitions of capitalized terms not included herein and further background on the Company’s debt structure discussed below. The Company was in compliance with all debt related covenants as of June 30, 2022 and December 31, 2021.

As of June 30, 2022 and December 31, 2021, debt consisted of the following:

			June 30, 2022						December 31, 2021
	Interest Rate as of June 30, 2022	Maturity Date	Carrying Amount		Unamortized Deferred Financing Fees (1)		Total Debt, Less Unamortized Deferred Financing Fees		Carrying Amount		Unamortized Deferred Financing Fees (1)		Total Debt, Less Unamortized Deferred Financing Fees
Senior Credit Facility
2024 Term Loan B	3.666%	September 2024	$	666.9	$	(6.6)	$	660.3	$	670.4	$	(8.0)	$	662.4
2028 Term Loan B	4.166%	May 2028		739.3		(15.7)		723.6		742.8		(17.0)		725.8
2026 Revolving Facility(2)	Various	May 2026		—		—		—		—		—		—
2029 Senior Notes	5.125%	April 2029		450.0		(13.8)		436.2		450.0		(14.7)		435.3
2025 Senior Notes	5.375%	September 2025		500.0		(4.4)		495.6		500.0		(5.0)		495.0
Accounts Receivable Securitization Facility(3)	Various	November 2024		—		—		—		—		—		—
Other indebtedness	Various	Various		4.3		—		4.3		5.6		—		5.6
Total debt			$	2,360.5	$	(40.5)	$	2,320.0	$	2,368.8	$	(44.7)	$	2,324.1
Less: current portion(4)								(17.7)						(18.5)
Total long-term debt, net of unamortized deferred financing fees							$	2,302.3					$	2,305.6

(1) This caption does not include deferred financing fees related to the Company’s revolving facilities, which are included within “Deferred charges and other assets” on the condensed consolidated balance sheets.

(2) As of June 30, 2022, under the 2026 Revolving Facility, the Company had a capacity of $375.0 million and funds available for borrowing of $368.9 million (net of $6.1 million outstanding letters of credit). Additionally, the Company is required to pay a quarterly commitment fee in respect of any unused commitments under this facility equal to 0.375% per annum.

(3) As of June 30, 2022, this facility had a borrowing capacity of $150.0 million, and the Company had approximately $150.0 million of accounts receivable available to support this facility, based on the pool of eligible accounts receivable.

(4) The current portion of long-term debt was primarily related to $14.5 million of the scheduled future principal payments on both the 2024 Term Loan B and 2028 Term Loan B as of June 30, 2022 and December 31, 2021.

NOTE 9—GOODWILL

The following table shows changes in the carrying amount of goodwill, by segment, from December 31, 2021 to June 30, 2022:

	Engineered		Latex		Base						Americas
	Materials		Binders		Plastics		Polystyrene		Feedstocks		Styrenics		Total
Balance at December 31, 2021	$	667.3	$	15.9	$	22.4	$	4.5	$	—	$	—	$	710.1
Acquisitions (Note 3)		—		—		22.8		—		—		—		22.8
Foreign currency impact		(17.6)		(1.6)		(3.8)		(0.5)		—		—		(23.5)
Balance at June 30, 2022	$	649.7	$	14.3	$	41.4	$	4.0	$	—	$	—	$	709.4

14

NOTE 10—DERIVATIVE INSTRUMENTS

The Company’s ongoing business operations expose it to various risks, including fluctuating foreign exchange rates and interest rate risk. To manage these risks, the Company periodically enters into derivative financial instruments, such as foreign exchange forward contracts and interest rate swap agreements. The Company does not hold or enter into financial instruments for trading or speculative purposes. All derivatives are recorded on the condensed consolidated balance sheets at fair value.

Foreign Exchange Forward Contracts

Certain subsidiaries have assets and liabilities denominated in currencies other than their respective functional currencies, which creates foreign exchange risk. The Company’s principal strategy in managing its exposure to changes in foreign currency exchange rates is to naturally hedge the foreign currency-denominated liabilities on its balance sheet against corresponding assets of the same currency, such that any changes in liabilities due to fluctuations in exchange rates are offset by changes in their corresponding foreign currency assets. In order to further reduce this exposure, the Company also uses foreign exchange forward contracts to economically hedge the impact of the variability in exchange rates on assets and liabilities denominated in certain foreign currencies. The Company entered into a specific such foreign exchange forward contract in December 2020 in order to economically hedge the euro-denominated purchase price of the Arkema PMMA business, which was acquired on May 3, 2021, as discussed in Note 3. These derivative contracts are not designated for hedge accounting treatment.

As of June 30, 2022, the Company had open foreign exchange forward contracts with a notional U.S. dollar equivalent absolute value of $689.6 million. The following table displays the notional amounts of the most significant net foreign exchange hedge positions outstanding as of June 30, 2022:

	June 30,
Buy / (Sell)	2022
Euro	$	(564.7)
Chinese Yuan	$	(48.7)
New Taiwan Dollar	$	16.4
Swedish Krona	$	12.6
South Korean Won	$	(12.4)

Open foreign exchange forward contracts as of June 30, 2022 had maturities occurring over a period of two months.

Foreign Exchange Cash Flow Hedges

The Company also enters into forward contracts, as deemed appropriate, with the objective of managing the currency risk associated with forecasted U.S. dollar-denominated raw materials purchases by one of its subsidiaries whose functional currency is the euro. By entering into these forward contracts, which are designated as cash flow hedges, the Company buys a designated amount of U.S. dollars and sells euros at the prevailing market rate to mitigate the risk associated with the fluctuations in the euro-to-U.S. dollar foreign currency exchange rates. The qualifying hedge contracts are marked-to-market at each reporting date and any unrealized gains or losses are included in Accumulated Other Comprehensive Income (“AOCI”) to the extent effective, and reclassified to cost of sales in the period during which the transaction affects earnings or it becomes probable that the forecasted transaction will not occur.

The Company had no open foreign exchange cash flow hedges as of June 30, 2022.

Interest Rate Swaps

On September 6, 2017, the Company issued the 2024 Term Loan B, which currently bears an interest rate of LIBOR plus 2.00%, subject to a 0.00% LIBOR floor. In order to reduce the variability in interest payments associated with the Company’s variable rate debt, during 2017 the Company entered into certain interest rate swap agreements to convert a portion of these variable rate borrowings into a fixed rate obligation. These interest rate swap agreements are designated as cash flow hedges, and as such, the contracts are marked-to-market at each reporting date and any

15

unrealized gains or losses are included in AOCI to the extent effective, and reclassified to interest expense in the period during which the transaction affects earnings or it becomes probable that the forecasted transaction will not occur.

As of June 30, 2022, the Company had open interest rate swap agreements with a net notional U.S. dollar equivalent of $200.0 million which had an effective date of September 29, 2017 and mature in September 2022. Under the terms of the swap agreements, the Company is required to pay the counterparties a stream of fixed interest payments at a rate of 1.81%, and in turn, receives variable interest payments based on 1-month LIBOR (1.67% as of June 30, 2022) from the counterparties.

Net Investment Hedge

The Company accounts for its cross currency swaps (“CCS”) under the spot method, meaning that changes in the fair value of the hedge included in the assessment of effectiveness (changes due to spot foreign exchange rates) are recorded within AOCI, where they remain until either the sale or substantially complete liquidation of the subsidiary subject to the hedge. Additionally, the initial value of any component excluded from the assessment of effectiveness is recognized in income using a systematic and rational method over the life of the hedging instrument and any difference between the change in the fair value of the excluded component and amounts recognized in income under that systematic and rational method is recognized in AOCI. When applicable, the Company amortizes any initial excluded component value of a CCS as a reduction of “Interest expense, net” in the condensed consolidated statements of operations using the straight-line method over the remaining term of the related CCS. Additionally, interest receipts and payments are accrued under the terms of the Company’s CCS and are recognized within “Interest expense, net” in the condensed consolidated statements of operations.

The Company entered into a CCS arrangement (the “2017 CCS”) on September 1, 2017, swapping U.S. dollar principal and interest payments of $500.0 million at an interest rate of 5.375% on its 2025 Senior Notes for euro-denominated payments of €420.0 million at a weighted average interest rate of 3.45% for approximately five years. On February 26, 2020, the Company settled its 2017 CCS and replaced it with a new CCS arrangement (the “2020 CCS”) that carried substantially the same terms as the 2017 CCS. Under the 2020 CCS, the Company notionally exchanged $500.0 million at an interest rate of 5.375% for €459.3 million at a weighted average interest rate of 3.672% for approximately 2.7 years, with a final maturity of November 3, 2022. The cash flows under the 2020 CCS are aligned with the Company’s principal and interest obligations on its 5.375% 2025 Senior Notes. Refer to the Annual Report for further information.

On April 7, 2022, the Company settled its existing 2020 CCS, which were set to mature in November 2022. Upon settlement of the 2020 CCS, the Company realized net cash proceeds of $1.9 million.

16

Summary of Derivative Instruments

The following table presents the effect of the Company’s derivative instruments, including those not designated for hedge accounting treatment, on the condensed consolidated statements of operations for the three and six months ended June 30, 2022 and 2021:

	Location and Amount of Gain (Loss) Recognized in Statements of Operations
	Three Months Ended						Three Months Ended
	June 30, 2022						June 30, 2021
	Cost of sales		Interest expense, net		Other (expense) income, net		Cost of sales		Interest expense, net		Acquisition purchase price hedge gain (loss)		Other (expense) income, net
Total amount of income and (expense) line items presented in the statements of operations in which the effects of derivative instruments are recorded	$	(1,286.4)	$	(25.4)	$	1.7	$	(1,053.7)	$	(21.6)	$	33.0	$	(6.1)
The effects of cash flow hedge instruments:
Foreign exchange cash flow hedges
Amount of gain (loss) reclassified from AOCI into income	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Interest rate swaps
Amount of loss reclassified from AOCI into income	$	—	$	(0.6)	$	—	$	—	$	(0.9)	$	—	$	—
The effects of net investment hedge instruments:
Cross currency swaps (CCS)
Amount of gain excluded from effectiveness testing	$	—	$	0.3	$	—	$	—	$	1.7	$	—	$	—
The effects of derivatives not designated as hedge instruments:
Foreign exchange forward contracts
Amount of gain recognized in income (1)	$	—	$	—	$	39.1	$	—	$	—	$	33.0	$	0.4

17

	Location and Amount of Gain (Loss) Recognized in Statements of Operations
	Six Months Ended						Six Months Ended
	June 30, 2022						June 30, 2021
	Cost of sales		Interest expense, net		Other (expense) income, net		Cost of sales		Interest expense, net		Acquisition purchase price hedge gain (loss)		Other (expense) income, net
Total amount of income and (expense) line items presented in the statements of operations in which the effects of derivative instruments are recorded	$	(2,497.1)	$	(47.3)	$	(1.3)	$	(1,850.8)	$	(33.6)	$	(22.0)	$	(8.5)
The effects of cash flow hedge instruments:
Foreign exchange cash flow hedges
Amount of gain (loss) reclassified from AOCI into income	$	—	$	—	$	—	$	(0.3)	$	—	$	—	$	—
Interest rate swaps
Amount of loss reclassified from AOCI into income	$	—	$	(1.4)	$	—	$	—	$	(1.7)	$	—	$	—
The effects of net investment hedge instruments:
Cross currency swaps (CCS)
Amount of gain excluded from effectiveness testing	$	—	$	2.4	$	—	$	—	$	3.6	$	—	$	—
The effects of derivatives not designated as hedge instruments:
Foreign exchange forward contracts
Amount of gain recognized in income (1)	$	—	$	—	$	47.9	$	—	$	—	$	(22.0)	$	20.1

(1) The $33.0 million gain and $22.0 million loss incurred from the change in fair value of the forward currency hedge arrangement on the euro-denominated purchase price of the Arkema PMMA business during the three and six months ended June 30, 2021, respectively, is presented separately in the condensed consolidated statements of operations from the gains recorded on the Company’s other foreign exchange forward contracts.

The following table presents the effect of cash flow and net investment hedge accounting on AOCI for the three and six months ended June 30, 2022 and 2021:

`	Gain (Loss) Recognized in AOCI on Balance Sheet
	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Designated as Cash Flow Hedges
Foreign exchange cash flow hedges	$	—	$	(1.0)	$	—	$	2.7
Interest rate swaps		0.9		0.8		2.4		1.7
Total	$	0.9	$	(0.2)	$	2.4	$	4.4
Designated as Net Investment Hedges
Cross currency swaps (CCS)	$	9.7	$	(7.1)	$	15.8	$	19.1
Total	$	9.7	$	(7.1)	$	15.8	$	19.1

18

	Gain (Loss) Recognized in Other expense, net in Statement of Operations
	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Settlements and changes in the fair value of forward contracts (not designated as hedges) (1)	$	39.1	$	0.4	$	47.9	$	20.1
Remeasurement of foreign currency-denominated assets and liabilities	$	(37.8)	$	0.6	$	(48.0)	$	(19.3)
Total	$	1.3	$	1.0	$	(0.1)	$	0.8

(1) Amount does not include the gain of $33.0 million and loss of $22.0 million recorded from the change in fair value of the forward currency hedge arrangement on the euro-denominated purchase price of the Arkema PMMA business during the three and six months ended June 30, 2021, respectively.

The Company expects to reclassify in the next twelve months an approximate $0.2 million net gain from AOCI into earnings related to the Company’s outstanding interest rate swaps as of June 30, 2022.

The following tables summarize the gross and net unrealized gains and losses, as well as the balance sheet classification, of outstanding derivatives recorded in the condensed consolidated balance sheets:

	June 30, 2022
	Foreign
	Exchange		Interest
Balance Sheet	Forward		Rate
Classification	Contracts		Swaps		Total
Asset Derivatives:
Accounts receivable, net of allowance	$	18.2	$	0.2	$	18.4
Gross derivative asset position		18.2		0.2		18.4
Less: Counterparty netting		(0.7)		—		(0.7)
Net derivative asset position	$	17.5	$	0.2	$	17.7
Liability Derivatives:
Accounts payable	$	(1.3)	$	—	$	(1.3)
Gross derivative liability position		(1.3)		—		(1.3)
Less: Counterparty netting		0.6		—		0.6
Net derivative liability position	$	(0.7)	$	—	$	(0.7)
Total net derivative position	$	16.8	$	0.2	$	17.0

19

	December 31, 2021
	Foreign
	Exchange		Interest		Cross
Balance Sheet	Forward		Rate		Currency
Classification	Contracts		Swaps		Swaps		Total
Asset Derivatives:
Accounts receivable, net of allowance	$	2.3	$	—	$	—	$	2.3
Gross derivative asset position		2.3		—		—		2.3
Less: Counterparty netting		(0.1)		—		—		(0.1)
Net derivative asset position	$	2.2	$	—	$	—	$	2.2
Liability Derivatives:
Accounts payable	$	(1.3)	$	(2.2)	$	(17.4)	$	(20.9)
Gross derivative liability position		(1.3)		(2.2)		(17.4)		(20.9)
Less: Counterparty netting		0.1		—		—		0.1
Net derivative liability position	$	(1.2)	$	(2.2)	$	(17.4)	$	(20.8)
Total net derivative position	$	1.0	$	(2.2)	$	(17.4)	$	(18.6)

Forward contracts, interest rate swaps, and cross currency swaps are entered into with a limited number of counterparties, each of which allows for net settlement of all contracts through a single payment in a single currency in the event of a default on or termination of any one contract. As such, in accordance with the Company’s accounting policy, these derivative instruments are recorded on a net basis by counterparty within the condensed consolidated balance sheets.

Refer to Notes 11 and 18 of the condensed consolidated financial statements for further information regarding the fair value of the Company’s derivative instruments and the related changes in AOCI.

NOTE 11—FAIR VALUE MEASUREMENTS

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Assets and liabilities measured at fair value are classified using the following hierarchy, which is based upon the transparency of inputs to the valuation as of the measurement date.

Level 1—Valuation is based upon quoted prices (unadjusted) for identical assets or liabilities in active markets.

Level 2—Valuation is based upon quoted prices for similar assets and liabilities in active markets, or other inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument.

Level 3—Valuation is based upon other unobservable inputs that are significant to the fair value measurement.

20

The following table summarizes the basis used to measure certain assets and liabilities at fair value on a recurring basis in the condensed consolidated balance sheets as of June 30, 2022 and December 31, 2021:

	June 30, 2022
	Quoted Prices in Active Markets for Identical Items		Significant Other Observable Inputs		Significant Unobservable Inputs
Assets (Liabilities) at Fair Value	(Level 1)		(Level 2)		(Level 3)		Total
Foreign exchange forward contracts—Assets	$	—	$	17.5	$	—	$	17.5
Foreign exchange forward contracts—(Liabilities)		—		(0.7)		—		(0.7)
Interest rate swaps—Assets		—		0.2		—		0.2
Total fair value	$	—	$	17.0	$	—	$	17.0

	December 31, 2021
	Quoted Prices in Active Markets for Identical Items		Significant Other Observable Inputs		Significant Unobservable Inputs
Assets (Liabilities) at Fair Value	(Level 1)		(Level 2)		(Level 3)		Total
Foreign exchange forward contracts—Assets	$	—	$	2.2	$	—	$	2.2
Foreign exchange forward contracts—(Liabilities)		—		(1.2)		—		(1.2)
Interest rate swaps—(Liabilities)		—		(2.2)		—		(2.2)
Cross currency swaps—(Liabilities)		—		(17.4)		—		(17.4)
Total fair value	$	—	$	(18.6)	$	—	$	(18.6)

The Company uses an income approach to value its derivative instruments, utilizing discounted cash flow techniques, considering the terms of the contract and observable market information available as of the reporting date, such as interest rate yield curves and currency spot and forward rates. Significant inputs to the valuation for these derivative instruments are obtained from broker quotations or from listed or over-the-counter market data, and are classified as Level 2 in the fair value hierarchy.

Nonrecurring Fair Value Measurements

The Company measured certain financial assets at fair value on a nonrecurring basis during the year ended December 31, 2021, which were still held as of June 30, 2022. These financial assets represent the Company’s styrene monomer assets in Boehlen, Germany, which it continues to operate. These assets were measured at fair value using underlying fixed asset records in conjunction with the use of industry experience and available market data, which are classified as Level 3 significant unobservable inputs in the fair value hierarchy. During the three and six months ended June 30, 2022, the Company recorded additional impairment charges of $1.3 million and $2.0 million, respectively, related to capital expenditures at the Boehlen styrene monomer facility that it determined to be impaired, which are also included within “Other charges” on the condensed consolidated statements of operations. Refer to the Company’s Annual Report for further information. As of June 30, 2022 and December 31, 2021, the value of the Boehlen styrene monomer assets are recorded at $3.1 million and $3.4 million, respectively, within the Company’s condensed consolidated balance sheets herein.

There were no other financial assets or liabilities measured at fair value on a nonrecurring basis as of December 31, 2021.

21

Fair Value of Debt Instruments

The following table presents the estimated fair value of the Company’s outstanding debt not carried at fair value as of June 30, 2022 and December 31, 2021:

	As of		As of
	June 30, 2022		December 31, 2021
2029 Senior Notes	$	323.5	$	460.2
2028 Term Loan B		700.1		737.4
2025 Senior Notes		426.7		509.4
2024 Term Loan B		634.0		667.5
Total fair value	$	2,084.3	$	2,374.5

The fair value of the Company’s debt facilities above (each Level 2 securities) is determined using over-the-counter market quotes and benchmark yields received from independent vendors. Fair value amount presented reflect the Company’s carrying value of debt, net of original issuance discount.

There were no other significant financial instruments outstanding as of June 30, 2022 and December 31, 2021.

NOTE 12—PROVISION FOR INCOME TAXES

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2022			2021			2022			2021
Effective income tax rate		45.4	%		14.9	%		49.7	%		17.9	%

Provision for income taxes for the three and six months ended June 30, 2022 totaled $30.8 million and $53.4 million, respectively, resulting in an effective tax rate of 45.4% and 49.7%, respectively. Provision for income taxes for the three and six months ended June 30, 2021 totaled $23.3 million and $43.4 million, respectively, resulting in an effective tax rate of 14.9% and 17.9%, respectively.

The most significant driver of the increase in the effective income tax rate for the three and six months ended June 30, 2022 compared to the prior year was the change in the Company’s forecasted jurisdictional mix of earnings, where losses expected to be generated in lower rate jurisdictions are being more than offset by income expected to be generated in higher tax jurisdictions.

Also impacting the effective tax rate for the three and six months ended June 30, 2022 was the revaluation of the Company’s net deferred tax assets in Switzerland, which were originally established as part of the Swiss cantonal tax reform measures enacted in 2019. This revaluation resulted in a one-time deferred tax expense of $15.3 million recorded in the second quarter of 2022. This expense was partially offset by the release of a valuation allowance of $8.5 million during the second quarter of 2022, as a result of improvements in actual and projected future results in one of the Company’s subsidiaries in Luxembourg.

Lastly, the effective income tax rate for the six months ended June 30, 2022 increased compared to the prior year due to a $35.6 million charge recorded in the first quarter of 2022 related to the European Commission request for information, as described within Note 13 in the condensed consolidated financial statements, for which the Company estimates no tax benefit based on currently available information.

NOTE 13—COMMITMENTS AND CONTINGENCIES

Environmental Matters

Accruals for environmental matters are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated based on current law, existing technologies and other information. Pursuant to the terms of the agreement associated with the Company’s formation, the pre-closing environmental liabilities were retained by Dow, and Dow agreed, subject to temporal, monetary, and other limitations to indemnify the Company from and against environmental liabilities incurred or relating to the predecessor periods. Other than certain

22

immaterial environmental liabilities assumed as part of the PMMA Acquisition and the Aristech Surfaces Acquisition, no environmental claims have been asserted or threatened against the Company. The Company is not a potentially responsible party for any material amounts at any Superfund Sites. As of June 30, 2022 and December 31, 2021, the Company had $3.8 million and $4.4 million, respectively, of accrued obligations for environmental remediation or restoration costs, which were recorded at fair value within the opening balance sheets of the PMMA business and Aristech Surfaces during 2021.

Inherent uncertainties exist in the Company’s potential environmental liabilities primarily due to unknown conditions, whether future claims may fall outside the scope of the indemnity, changing governmental regulations and legal standards regarding liability, and evolving technologies for handling site remediation and restoration. In connection with the Company’s existing indemnification, the possibility is considered remote that environmental remediation costs will have a material adverse impact on the condensed consolidated financial statements over the next 12 months.

Purchase Commitments

In the normal course of business, the Company has certain raw material purchase contracts where it is required to purchase certain minimum volumes at current market prices. These commitments range from one to five years. In certain raw material purchase contracts, the Company has the right to purchase less than the required minimums and pay a liquidated damages fee, or, in case of a permanent plant shutdown, to terminate the contracts. In such cases, these obligations would be less than the annual commitment as disclosed in the Notes to Consolidated Financial Statements included in the Annual Report.

Litigation Matters

From time to time, the Company may be subject to various legal claims and proceedings incidental to the normal conduct of business, relating to such matters as employees, product liability, antitrust/competition, past waste disposal practices and release of chemicals into the environment. While it is impossible at this time to determine with certainty the ultimate outcome of these routine claims, the Company does not believe that the ultimate resolution of these claims will have a material adverse effect on the Company’s results of operations, financial condition or cash flow. Legal costs, including those legal costs expected to be incurred in connection with a loss contingency, are expensed as incurred.

European Commission Request for Information

On June 6, 2018, Trinseo Europe GmbH, a subsidiary of the Company, received a request for information in the form of a letter from the European Commission Directorate General for Competition (the “European Commission”) related to styrene monomer commercial activity in the European Economic Area. The Company subsequently commenced an internal investigation into these commercial activities and discovered instances of inappropriate activity. On October 28, 2019, a supplemental request for information was received from the European Commission. This request was limited to historical employment, entity, and organizational structures, along with certain financial, styrene purchasing, and styrene market information, as well as certain spot styrene purchase contracts. The Company has provided all information requested and continues to fully cooperate with the European Commission.

As a result of further developments in this matter, during the first quarter of 2022, the Company recorded a charge of $35.6 million which is included within “Other charges” on the condensed consolidated statements of operations. As of June 30, 2022, the estimated liability recorded on the balance sheet related to this matter was $33.4 million, adjusted for foreign exchange rate impacts. The Company is unable to predict the ultimate outcome of this matter, which remains ongoing. Based on its findings, the European Commission may decide to adopt a final decision imposing additional fines and/or request certain behavioral or structural commitments from the Company. However, any additional potential losses incurred could be material to the Company’s results of operations, balance sheet, and cash flows.

23

NOTE 14—PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS

The components of net periodic benefit costs for all significant plans were as follows:

	Three Months Ended				Three Months Ended
	June 30,				June 30,
	Non-U.S. Defined Benefit Pension Plans				U.S. Defined Benefit Pension (1)
	2022		2021		2022		2021
Net periodic benefit cost
Service cost	$	3.1	$	4.0	$	0.3	$	0.1
Interest cost		0.6		0.4		0.1		0.1
Expected return on plan assets		—		(0.1)		(0.3)		(0.2)
Amortization of prior service credit		(0.1)		(0.2)		—		—
Amortization of net loss		0.6		1.6		—		—
Settlement and curtailment gain		(1.9)		—		—		—
Net periodic benefit cost	$	2.3	$	5.7	$	0.1	$	—

	Six Months Ended				Six Months Ended
	June 30,				June 30,
	Non-U.S. Defined Benefit Pension Plans				U.S. Defined Benefit Pension (1)
	2022		2021		2022		2021
Net periodic benefit cost
Service cost	$	6.3	$	8.1	$	0.5	$	0.1
Interest cost		1.3		0.9		0.3		0.1
Expected return on plan assets		(0.1)		(0.1)		(0.5)		(0.2)
Amortization of prior service credit		(0.2)		(0.4)		—		—
Amortization of net loss		1.3		3.1		—		—
Settlement and curtailment gain		(1.9)		—		—		—
Net periodic benefit cost	$	6.7	$	11.6	$	0.3	$	—

(1) The Company’s U.S. defined benefit pension plans were acquired in 2021, primarily in conjunction with the PMMA Acquisition.

The Company had less than $0.1 million of net periodic benefit costs for its other postretirement plans for the three and six months ended June 30, 2022 and 2021.

Service cost related to the Company’s defined benefit pension plans and other postretirement plans is included within “Cost of sales” and “Selling, general and administrative expenses,” whereas all other components of net periodic benefit cost are included within “Other expense, net” in the condensed consolidated statements of operations. As of June 30, 2022 and December 31, 2021, the Company’s benefit obligations included primarily in “Other noncurrent obligations” in the condensed consolidated balance sheets were $249.4 million and $274.7 million, respectively.

The Company made cash contributions and benefit payments to unfunded plans of approximately $2.1 million and $4.6 million during the three and six months ended June 30, 2022, respectively. The Company expects to make additional cash contributions, including benefit payments to unfunded plans, of approximately $4.2 million to its defined benefit plans for the remainder of 2022.

NOTE 15—SHARE-BASED COMPENSATION

Refer to the Annual Report for definitions of capitalized terms not included herein and further background on the

24

Company’s share-based compensation programs included in the tables below.

The following table summarizes the Company’s share-based compensation expense for the three and six months ended June 30, 2022 and 2021, as well as unrecognized compensation cost as of June 30, 2022:

									As of
	Three Months Ended				Six Months Ended				June 30, 2022
	June 30,				June 30,				Unrecognized		Weighted
	2022		2021		2022		2021		Compensation Cost		Average Years
RSUs	$	2.4	$	1.9	$	7.0	$	3.6	$	13.7	1.9
Options		0.7		1.1		3.8		2.2		3.4	1.6
PSUs		0.7		0.7		1.4		1.2		5.1	2.2
Total share-based compensation expense	$	3.8	$	3.7	$	12.2	$	7.0

The following table summarizes awards granted and the respective weighted average grant date fair value for the six months ended June 30, 2022:

	Six Months Ended
	June 30, 2022
	Awards Granted		Weighted Average Grant Date Fair Value per Award
RSUs		196,071	$	52.31
Options		192,175		22.52
PSUs		63,317		57.47

Option Awards

The following are the weighted average assumptions used within the Black-Scholes pricing model for the Company’s option awards granted during the six months ended June 30, 2022:

	Six Months Ended
	June 30, 2022
Expected term (in years)	5.50
Expected volatility	48.72	%
Risk-free interest rate	1.97	%
Dividend yield	2.00	%

The expected volatility assumption is determined based on the historical volatility of the Company’s publicly traded ordinary shares. The expected term of option awards represents the period of time that option awards granted are expected to be outstanding. For the option awards granted during the six months ended June 30, 2022, the simplified method was used to calculate the expected term, given the Company’s limited historical exercise data. The risk-free interest rate for the periods within the expected term of option awards is based on the U.S. Treasury yield curve in effect at the time of grant. The dividend yield is estimated based on historical and expected dividend activity.

25

Performance Share Units (PSUs)

The following are the weighted average assumptions used within the Monte Carlo valuation model for PSUs granted during the six months ended June 30, 2022:

		Six Months Ended
		June 30, 2022
Expected term (in years)		3.00
Expected volatility		57.30	%
Risk-free interest rate		1.73	%
Share price	$	58.64

Determining the fair value of PSUs requires considerable judgment, including estimating the expected volatility of the price of the Company’s ordinary shares, the correlation between the Company’s share price and that of its peer companies, and the expected rate of interest. The expected volatility for each grant is determined based on the historical volatility of the Company’s ordinary shares. The expected term of PSUs represents the length of the performance period. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for a duration equivalent to the performance period. The share price is the closing price of the Company’s ordinary shares on the grant date.

NOTE 16—SEGMENTS

The Company operates under six segments: Engineered Materials, Latex Binders, Base Plastics, Polystyrene, Feedstocks, and Americas Styrenics. The Engineered Materials segment includes the Company’s compounds and blends products sold into higher growth and value applications, such as consumer electronics and medical, as well as soft thermoplastic elastomers (“TPEs”) products which are sold into markets such as footwear and automotive. Additionally, following the PMMA Acquisition on May 3, 2021 and the Aristech Surfaces Acquisition on September 1, 2021, the Engineered Materials segment also includes PMMA and MMA products, which are sold into a variety of applications including automotive, building & construction, medical, consumer electronics, and wellness, among others. The Latex Binders segment produces styrene-butadiene latex (“SB latex”) and other latex polymers and binders, primarily for coated paper and packaging board, carpet and artificial turf backings, as well as a number of performance latex binders applications, such as adhesive, building and construction and the technical textile paper market. The Base Plastics segment contains the results of the acrylonitrile-butadiene-styrene (“ABS”), styrene-acrylonitrile (“SAN”), and polycarbonate (“PC”) businesses, as well as compounds and blends for automotive and other applications. The Base Plastics segment also includes the results of Heathland, which was acquired in the first quarter of 2022. The Polystyrene segment includes a variety of general purpose polystyrenes (“GPPS”) and polystyrene that has been modified with polybutadiene rubber to increase its impact resistant properties (“HIPS”). The Feedstocks segment includes the Company’s production and procurement of styrene monomer outside of North America, which is used as a key raw material in many of the Company’s products, including polystyrene, SB latex, and ABS resins. Lastly, the Americas Styrenics segment consists solely of the operations of the Company’s 50%-owned joint venture, Americas Styrenics, a producer of both styrene monomer and polystyrene in North America.

The following table provides disclosure of the Company’s segment Adjusted EBITDA, which is used to measure segment operating performance and is defined below, for the three and six months ended June 30, 2022 and 2021. Asset and intersegment sales information by reporting segment is not regularly reviewed or included with the Company’s reporting to the chief operating decision maker. Therefore, this information has not been disclosed below. Refer to Note

26

5 for the Company’s net sales to external customers by segment for the three and six months ended June 30, 2022 and 2021.

	Engineered		Latex		Base						Americas
Three Months Ended (1)	Materials		Binders		Plastics		Polystyrene		Feedstocks		Styrenics
June 30, 2022	$	34.0	$	29.4	$	46.1	$	23.0	$	14.2	$	39.4
June 30, 2021	$	27.8	$	32.2	$	82.0	$	51.1	$	39.8	$	30.1

	Engineered		Latex		Base						Americas
Six Months Ended (1)	Materials		Binders		Plastics		Polystyrene		Feedstocks		Styrenics
June 30, 2022	$	68.7	$	59.6	$	114.7	$	68.3	$	18.3	$	61.0
June 30, 2021	$	35.8	$	49.0	$	147.5	$	98.4	$	86.1	$	53.0

(1) The Company’s primary measure of segment operating performance is Adjusted EBITDA, which is defined as income from continuing operations before interest expense, net; provision for income taxes; 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. Segment Adjusted EBITDA is a key metric that is used by management to evaluate business performance in comparison to budgets, forecasts, and prior year financial results, providing a measure that management believes reflects core operating performance by removing the impact of transactions and events that would not be considered a part of core operations. Other companies in the industry may define segment Adjusted EBITDA differently than the Company, and as a result, it may be difficult to use segment Adjusted EBITDA, or similarly named financial measures, that other companies may use to compare the performance of those companies to the Company’s segment performance.

The reconciliation of income from continuing operations before income taxes to segment Adjusted EBITDA is as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Income from continuing operations before income taxes	$	67.9	$	156.3	$	107.6	$	242.2
Interest expense, net		25.4		21.6		47.3		33.6
Depreciation and amortization		48.1		38.1		101.1		61.2
Corporate Unallocated(2)		21.6		23.9		48.5		46.4
Adjusted EBITDA Addbacks(3)		23.1		23.1		86.1		86.4
Segment Adjusted EBITDA	$	186.1	$	263.0	$	390.6	$	469.8

(2) Corporate unallocated includes corporate overhead costs and certain other income and expenses.

(3) Adjusted EBITDA addbacks for the three and six months ended June 30, 2022 and 2021 are as follows:

27

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Net gain on disposition of businesses and assets	$	(1.5)	$	—	$	(1.8)	$	(0.2)
Restructuring and other charges (Note 17)		(1.5)		6.3		(1.0)		6.7
Acquisition transaction and integration net costs (Note 3)		2.7		43.2		5.9		49.2
Acquisition purchase price hedge (gain) loss (Note 10)		—		(33.0)		—		22.0
Asset impairment charges or write-offs (Note 11)		1.3		1.8		2.0		1.8
European Commission request for information (Note 13)		—		—		35.6		—
Other items (a)		22.1		4.8		45.4		6.9
Total Adjusted EBITDA Addbacks	$	23.1	$	23.1	$	86.1	$	86.4

(a) Other items for the three and six months ended June 30, 2022 primarily relate to fees incurred in conjunction with certain of the Company’s strategic initiatives, as well as our transition to a new enterprise resource planning system. Other items for the three and six months ended June 30, 2021 primarily relate to fees incurred in conjunction with certain of the Company’s strategic initiatives.

NOTE 17—RESTRUCTURING

Refer to the Annual Report for further details regarding the Company’s previously announced restructuring activities included in the tables below. Restructuring charges are included within “Selling, general and administrative expenses” in the condensed consolidated statements of operations.

The following table provides detail of the Company’s restructuring charges for the three and six months ended June 30, 2022 and 2021:

	Three Months Ended				Six Months Ended				Cumulative
	June 30,				June 30,				Life-to-date
	2022		2021		2022		2021		Charges		Segment
Transformational Restructuring Program
Employee termination benefits	$	(0.2)	$	6.2	$	0.1	$	6.2	$	8.8	N/A(1)
Transformational Restructuring Program Subtotal	$	(0.2)	$	6.2	$	0.1	$	6.2	$	8.8
Other Restructurings		(1.3)		(0.3)		(1.1)		0.1			Various
Total Restructuring Charges	$	(1.5)	$	5.9	$	(1.0)	$	6.3

(1) In May 2021, the Company approved a transformational restructuring program associated with the Company’s recent strategic initiatives. The Company expects to incur incremental employee termination benefit charges related to impacted employees as of June 30, 2022 of less than $1.0 million, the majority of which are expected to be paid by December 31, 2022. As this was identified as a corporate-related activity, the charges related to this restructuring program were not allocated to a specific segment, but rather included within corporate unallocated.

28

The following table provides a roll forward of the liability balances associated with the Company’s restructuring activities as of June 30, 2022. Employee termination benefit and contract termination charges are primarily recorded within “Accrued expenses and other current liabilities” in the condensed consolidated balance sheets.

	Balance at						Balance at
	December 31, 2021		Expenses		Deductions(1)		June 30, 2022
Employee termination benefits	$	10.0	$	(1.4)	$	(3.2)	$	5.4
Decommissioning and other		—		0.1		(0.1)		—
Total	$	10.0	$	(1.3)	$	(3.3)	$	5.4

(1) Primarily includes payments made against the existing accrual, as well as immaterial impacts of foreign currency remeasurement.

NOTE 18—ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The components of AOCI, net of income taxes, consisted of:

	Cumulative		Pension & Other
	Translation		Postretirement Benefit			Cash Flow
Three Months Ended June 30, 2022 and 2021	Adjustments		Plans, Net			Hedges, Net	Total
Balance as of March 31, 2022	$	(118.6)	$	(33.3)	$	2.2	$	(149.7)
Other comprehensive income (loss)		(34.8)		7.7		—		(27.1)
Amounts reclassified from AOCI to net income(1)		—		(1.4)		0.3		(1.1)
Balance as of June 30, 2022	$	(153.4)	$	(27.0)	$	2.5	$	(177.9)
Balance as of March 31, 2021	$	(108.6)	$	(70.8)	$	(0.6)	$	(180.0)
Other comprehensive income (loss)		(0.7)		—		(1.1)		(1.8)
Amounts reclassified from AOCI to net income (1)		—		1.0		0.9		1.9
Balance as of June 30, 2021	$	(109.3)	$	(69.8)	$	(0.8)	$	(179.9)

	Cumulative		Pension & Other
	Translation		Postretirement Benefit		Cash Flow
Six Months Ended June 30, 2022 and 2021	Adjustments		Plans, Net		Hedges, Net		Total
Balance as of December 31, 2021	$	(114.3)	$	(33.6)	$	0.7	$	(147.2)
Other comprehensive income (loss)		(39.1)		7.7		0.7		(30.7)
Amounts reclassified from AOCI to net income(1)		—		(1.1)		1.1		—
Balance as of June 30, 2022	$	(153.4)	$	(27.0)	$	2.5	$	(177.9)
Balance as of December 31, 2020	$	(109.0)	$	(71.9)	$	(5.2)	$	(186.1)
Other comprehensive income (loss)		(0.3)		—		2.4		2.1
Amounts reclassified from AOCI to net income(1)		—		2.1		2.0		4.1
Balance as of June 30, 2021	$	(109.3)	$	(69.8)	$	(0.8)	$	(179.9)

(1) The following is a summary of amounts reclassified from AOCI to net income (loss) for the three and six months ended June 30, 2022 and 2021:

29

	Three Months Ended				Six Months Ended
	June 30,				June 30,				Statements of Operations
AOCI Components	2022		2021		2022		2021		Classification
Cash flow hedging items
Foreign exchange cash flow hedges	$	—	$	—	$	—	$	0.3	Cost of sales
Interest rate swaps		0.6		0.9		1.4		1.7	Interest expense, net
Total before tax		0.6		0.9		1.4		2.0
Tax effect		(0.3)		—		(0.3)		—	Provision for income taxes
Total, net of tax	$	0.3	$	0.9	$	1.1	$	2.0
Amortization of pension and other postretirement benefit plan items
Prior service credit	$	(0.1)	$	(0.2)	$	(0.2)	$	(0.5)	(a)
Net actuarial loss		0.6		1.7		1.2		3.6	(a)
Net curtailment and settlement gain		(1.9)		—		(1.9)		—	(a)
Total before tax		(1.4)		1.5		(0.9)		3.1
Tax effect		—		(0.5)		(0.2)		(1.0)	Provision for income taxes
Total, net of tax	$	(1.4)	$	1.0	$	(1.1)	$	2.1

(a) These AOCI components are included in the computation of net periodic benefit costs (see Note 14).

.

NOTE 19—EARNINGS PER SHARE

Basic earnings per ordinary share (“basic EPS”) is computed by dividing net income available to ordinary shareholders by the weighted average number of the Company’s ordinary shares outstanding for the applicable period. Diluted earnings per ordinary share (“diluted EPS”) is calculated using net income available to ordinary shareholders divided by diluted weighted average ordinary shares outstanding during each period, which includes unvested RSUs, option awards, and PSUs. Diluted EPS considers the impact of potentially dilutive securities except in periods in which there is a loss from continuing operations because the inclusion of the potential ordinary shares would have an anti-dilutive effect.

30

The following table presents basic EPS and diluted EPS for the three and six months ended June 30, 2022 and 2021.

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in millions, except per share data)	2022		2021		2022		2021
Earnings:
Net income from continuing operations	$	37.1	$	133.0	$	54.2	$	198.8
Net income from discontinued operations		0.3		18.6		—		24.3
Net income	$	37.4	$	151.6	$	54.2	$	223.1
Shares:
Weighted average ordinary shares outstanding		36.3		38.8		36.8		38.6
Dilutive effect of RSUs, option awards, and PSUs(1)		0.7		0.8		0.8		1.0
Diluted weighted average ordinary shares outstanding		37.0		39.6		37.6		39.6
Income per share:
Income per share—basic:
Continuing operations	$	1.02	$	3.43	$	1.47	$	5.15
Discontinued operations		0.01		0.48		—		0.62
Income per share—basic	$	1.03	$	3.91	$	1.47	$	5.77
Income per share—diluted:
Continuing operations	$	1.00	$	3.35	$	1.44	$	5.02
Discontinued operations		0.01		0.47		—		0.61
Income per share—diluted	$	1.01	$	3.82	$	1.44	$	5.63

(1) Refer to Note 15 for discussion of RSUs, option awards, and PSUs granted to certain Company directors and employees. There were 1.0 million and 0.9 million anti-dilutive shares that have been excluded from the computation of diluted earnings per share for the three and six months ended June 30, 2022, respectively, and 0.6 million for the three and six months ended June 30, 2021.

NOTE 20—OTHER CHARGES

Other charges consisted of the following:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Asset impairment charges or write-offs (Note 11)	$	1.3	$	1.8	$	2.0	$	1.8
European Commission request for information (Note 13)		—		—		35.6		—
Total	$	1.3	$	1.8	$	37.6	$	1.8

t

31

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

2022 Year-to-Date Highlights

During the three and six months ended June 30, 2022, Trinseo recognized net income from continuing operations of $37.1 million and $54.2 million, respectively and Adjusted EBITDA of $164.5 million and $342.1 million, respectively. These solid results were achieved despite an increasingly challenging operating environment that is forcing both Trinseo and our customers to contend with issues including COVID-19 lockdowns in China, cautious spending and softening demand in Europe from an uncertain geopolitical situation, high raw material and energy costs, and persistent supply chain constraints. Refer to the discussion below for further information and refer to “Non-GAAP Performance Measures” for discussion of our use of non-GAAP measures in evaluating our performance and a reconciliation of these measures. Other highlights for the year are described below.

European Commission Request for Information

In 2018, Trinseo received a request for information from the European Commission Directorate General for Competition (the “European Commission”) related to styrene monomer commercial activity in the European Economic Area, as well as subsequent requests for information. Trinseo has fully responded to all information requests from the European Commission and continues to fully cooperate on this matter, which remains ongoing. As a result of further developments in this matter, during the first quarter of 2022, Trinseo recorded a charge of $35.6 million which is included within “Other charges” on the condensed consolidated statements of operations. Refer to Note 13 in the condensed consolidated financial statements for more information.

Acquisition of Heathland

On January 3, 2022, the Company closed on the previously-announced acquisition of Heathland B.V. (“Heathland”) for an estimated purchase price of $29.3 million, including an initial cash purchase price of $22.9 million, as well as $6.4 million of contingent cash consideration, representing the fair value of certain earn-out payments (the “Heathland Acquisition”). Heathland is based in Utrecht, the Netherlands, and is focused on converting post-consumer and post-industrial PMMA, PC, ABS, polystyrene, and other thermoplastic waste for use in a wide range of high-end applications. The acquisition of Heathland is consistent with Trinseo’s strategy and enhances our footprint as a sustainable solutions provider. Refer to Note 3 in the condensed consolidated financial statements for more information.

Process Pause for Divestiture of Styrenics Business

In November 2021, the Company announced that it had begun work to explore the divestiture of our styrenics business and subsequently launched a formal sales process in the first quarter of 2022. The scope of the potential divestiture was expected to include the Feedstocks and Polystyrene reporting segments as well as our 50% ownership of Americas Styrenics. While this process generated broad and significant interest from both strategic and financial parties, the deterioration of financing markets and the economic uncertainty created by the war in Ukraine, particularly in European energy markets, has impeded the Company’s ability to obtain full value for the styrenics business. As a result, the Company has decided to pause the sale process.

This pause does not change the Company’s transformation strategy of becoming a higher growth, higher margin, and less volatile specialty material and sustainable solutions provider. The Company intends to reevaluate a potential sale of the styrenics business when macroeconomic conditions improve.

32

Results of Operations

Results of Operations for the Three and Six Months Ended June 30, 2022 and 2021

	Three Months Ended								Six Months Ended
	June 30,								June 30,
(in millions)	2022		%		2021		%		2022		%		2021		%
Net sales	$	1,425.5	100	%	$	1,273.7	100	%	$	2,812.2	100	%	$	2,259.7	100	%
Cost of sales		1,286.4	90	%		1,053.7	83	%		2,497.1	89	%		1,850.8	82	%
Gross profit		139.1	10	%		220.0	17	%		315.1	11	%		408.9	18	%
Selling, general and administrative expenses		85.6	6	%		97.3	8	%		182.3	6	%		153.8	7	%
Equity in earnings of unconsolidated affiliates		39.4	3	%		30.1	2	%		61.0	2	%		53.0	2	%
Other charges		1.3	—	%		1.8	—	%		37.6	1	%		1.8	—	%
Operating income		91.6	7	%		151.0	11	%		156.2	6	%		306.3	13	%
Interest expense, net		25.4	2	%		21.6	2	%		47.3	2	%		33.6	1	%
Acquisition purchase price hedge (gain) loss		—	—	%		(33.0)	(3)	%		—	—	%		22.0	1	%
Other expense (income), net		(1.7)	—	%		6.1	—	%		1.3	—	%		8.5	—	%
Income from continuing operations before income taxes		67.9	5	%		156.3	12	%		107.6	4	%		242.2	11	%
Provision for income taxes		30.8	2	%		23.3	2	%		53.4	2	%		43.4	2	%
Net income from continuing operations	$	37.1	3	%	$	133.0	10	%	$	54.2	2	%	$	198.8	9	%
Net income from discontinued operations, net of income taxes		0.3	—	%		18.6	2	%		—	—	%		24.3	1	%
Net income	$	37.4	3	%	$	151.6	12	%	$	54.2	2	%	$	223.1	10	%

Three Months Ended – June 30, 2022 vs. June 30, 2021

Net Sales

Of the 12% increase in net sales, 14% was attributable to increased selling prices, mainly due to the pass through of higher raw material costs, such as styrene, along with higher energy costs. Also contributing to the increase was the contributions from our acquisitions in 2021, including the PMMA Acquisition, which closed on May 3, 2021, and the Aristech Surfaces Acquisition, which closed on September 1, 2021. These increases were partially offset by lower volumes across several segments mainly from less demand to building & construction, automotive, appliance and consumer electronics applications, including the impact of COVID-19 lockdowns in China.

Cost of Sales

The 22% increase in cost of sales was primarily attributable to a 20% increase in raw material costs and a 9% increase related to the PMMA Acquisition and Aristech Surfaces Acquisition. Partially offsetting these increases was a decrease of 7% due to lower volumes.

Gross Profit

The decrease in gross profit of 37% was primarily attributable to lower margins compared to the very high levels observed in the second quarter of 2021 in Feedstocks and Polystyrene, as well as lower sales volume. These impacts were partially offset by additional gross profit from the 2021 acquisitions. See the segment discussion below for further information.

33

Selling, General and Administrative Expenses (SG&A)

The $11.7 million, or 12%, decrease in SG&A was primarily due to a decrease of $40.5 million related to acquisition transaction and integration costs incurred, primarily in connection with the PMMA Acquisition. Offsetting these costs was an $18.1 million increase in costs associated with the Company’s strategic initiatives, including the exploration of a potential divestiture of our styrenics business, a $4.9 million increase in employee compensation, particularly from newly acquired businesses, and $0.9 million of costs incurred in connection with the Company’s enterprise resource planning system upgrade.

Equity in Earnings of Unconsolidated Affiliates

The increase in equity earnings of $9.3 million was due to higher equity earnings from Americas Styrenics due to higher styrene profitability, which was partially offset by lower sales volume that resulted from the styrene production outages in the current period.

Other Charges

During the three months ended June 30, 2022 and 2021, the Company recorded impairment charges of $1.3 million and $1.8 million, respectively, related to our Boehlen styrene monomer assets, as described within Note 11 in the condensed consolidated financial statements.

Interest Expense, Net

The increase in interest expense, net of $3.8 million, or 18%, was primarily attributable to the Company’s issuance of the 2028 Term Loan B, issued in the second quarter of 2021. Refer to Note 8 in the condensed consolidated financial statements for further information.

Acquisition Purchase Price Hedge (Gain) Loss

The $33.0 million acquisition purchase price hedge gain for the three months ended June 30, 2021 was due to the change in fair value of the Company’s forward currency hedge arrangement on the euro-denominated purchase price of the PMMA business.

Other Expense (Income), Net

Other income, net for the three months ended June 30, 2022 was $1.7 million, which included a $1.0 million of income related to the non-service cost components of net periodic benefit cost, as well as foreign exchange transaction gains of $1.3 million. These net foreign exchange transaction gains included $37.8 million of losses primarily from the remeasurement of our euro-denominated payables due to the relative changes in rates between the U.S. dollar and the euro during the period, partially offset by $39.1 million of gains from our foreign exchange forward contracts.

Other expense, net for the three months ended June 30, 2021 was $6.1 million, which included $1.6 million of expense related to the non-service cost components of net periodic benefit cost and $4.5 million of transfer taxes associated with the PMMA Acquisition. These expense amounts were partially offset by foreign exchange transaction gains of $1.0 million, which included $0.6 million of foreign exchange transaction gains primarily from the remeasurement of our euro-denominated payables due to the relative changes in rates between the U.S. dollar and the euro during the period, in addition to $0.4 million of gains from our foreign exchange forward contracts, excluding the acquisition purchase price hedge.

Provision for Income Taxes

Despite a year-over-year decrease of $88.4 million in income from continuing operations before income taxes, the provision for income taxes increased from $23.3 million in the prior year to $30.8 million in the three months ended June 30, 2022. The most significant driver of this increase in provision for income taxes was the change in the Company’s forecasted jurisdictional mix of earnings, where losses expected to be generated in lower rate jurisdictions are being more than offset by income expected to be generated in higher tax jurisdictions.

34

Also increasing the provision for income taxes in the current year was the revaluation of the Company’s net deferred tax assets in Switzerland, which were originally established as part of the Swiss cantonal tax reform measures enacted in 2019. This revaluation resulted in a one-time deferred tax expense of $15.3 million recorded in the second quarter of 2022. This expense was partially offset by the release of a valuation allowance of $8.5 million during the second quarter of 2022, as a result of improvements in actual and projected future results in one of the Company’s subsidiaries in Luxembourg.

Net Income from Discontinued Operations, Net of Income Taxes

Net income from discontinued operations, net of income taxes during the three months ended June 30, 2022 and 2021 was $0.3 million and $18.6 million, respectively, and was related the results and sale of our Synthetic Rubber business. Refer to Note 4 in the condensed consolidated financial statements for further information.

Six Months Ended – June 30, 2022 vs. June 30, 2021

Net Sales

Of the 24% increase in net sales, 19% was attributable to increased selling prices, mainly due to the pass through of higher raw material costs, such as styrene, along with higher energy costs. An additional 15% increase was due to the contributions from our acquisitions in 2021, including the PMMA Acquisition, which closed on May 3, 2021, and the Aristech Surfaces Acquisition, which closed on September 1, 2021. These increases were partially offset by a 7% decrease due to lower volumes across all segments due to softening demand in several applications as well as the impacts of COVID-19 in China.

Cost of Sales

The 35% increase in cost of sales was primarily attributable to a 21% increase in raw material costs and a 17% increase related to the PMMA Acquisition and Aristech Surfaces Acquisition. Partially offsetting these increases was a decrease of 7% due to lower volumes.

Gross Profit

The decrease in gross profit of 23% was primarily attributable to lower margins compared to the very high levels observed in the first half of 2021 in Feedstocks and Polystyrene, as well as lower sales volume as described above. These impacts were partially offset by additional gross profit from the 2021 acquisitions. See the segment discussion below for further information.

Selling, General and Administrative Expenses (SG&A)

The $28.5 million, or 19%, increase in SG&A was primarily due to a $37.2 million increase in costs associated with the Company’s strategic initiatives, including the exploration of a potential divestiture of our styrenics business, as well as $3.1 million of costs incurred in connection with the Company’s enterprise resource planning system upgrade. Also contributing to the increase was an $11.7 million increase in salaries, wages and fringe costs due to the addition of personnel from acquisitions, a $3.7 million increase in additional depreciation and amortization expense from the PMMA Acquisition and the Aristech Surfaces Acquisition, a $2.8 million increase in travel, and a $3.0 million increase in bad debt expense. Partially offsetting these increases was a decrease of $43.3 million related to acquisition transaction and integration costs incurred in the prior year, primarily in connection with the PMMA Acquisition.

Equity in Earnings of Unconsolidated Affiliates

The increase in equity earnings of $8.0 million was due to higher equity earnings from Americas Styrenics due to higher styrene profitability, which was partially offset by lower sales volume that resulted from the styrene production outages in the current period.

35

Other Charges

During the six months ended June 30, 2022, the Company recorded a charge of $35.6 million related to the European Commission request for information, as described within Note 13 in the condensed consolidated financial statements. The Company also recorded impairment charges of $2.0 million and $1.8 million related to our Boehlen styrene monomer assets during the six months ended June 30, 2022 and 2021, respectively, as described within Note 11 in the condensed consolidated financial statements.

Interest Expense, Net

The increase in interest expense, net of $13.7 million, or 41%, was primarily attributable to the Company’s issuance of the 2029 Senior Notes, which were not issued until late in the first quarter of 2021 and the 2028 Term Loan B, issued in the second quarter of 2021. Refer to Note 8 in the condensed consolidated financial statements for further information.

Acquisition Purchase Price Hedge (Gain) Loss

The $22.0 million acquisition purchase price hedge loss for the six months ended June 30, 2021 was due to the change in fair value of the Company’s forward currency hedge arrangement on the euro-denominated purchase price of the PMMA business.

Other Expense, Net

Other expense, net for the six months ended June 30, 2022 was $1.3 million, which included $0.2 million of expense related to the non-service cost components of net periodic benefit cost as well as foreign exchange transaction losses of $0.1 million. These net foreign exchange transaction losses included $48.0 million of losses primarily from the remeasurement of our euro-denominated payables due to the relative changes in rates between the U.S. dollar and the euro during the period, partially offset by $47.9 million of gains from our foreign exchange forward contracts.

Other expense, net for the six months ended June 30, 2021 was $8.5 million, which included $3.4 million of expense related to the non-service cost components of net periodic benefit cost and $4.5 million of transfer taxes associated with the PMMA Acquisition. These expense amounts were partially offset by foreign exchange transaction gains of $0.8 million, which included $19.3 million of foreign exchange transaction losses primarily from the remeasurement of our euro-denominated payables due to the relative changes in rates between the U.S. dollar and the euro during the period, offset by $20.1 million of gains from our foreign exchange forward contracts, excluding the acquisition purchase price hedge.

Provision for Income Taxes

Despite a year-over-year decrease of $134.6 million in income from continuing operations before income taxes, the provision for income taxes increased from $43.4 million in the prior year to $53.4 million in the six months ended June 30, 2022. The most significant driver of this increase in provision for income taxes was the Company’s forecasted jurisdictional mix of earnings, where losses expected to be generated in lower rate jurisdictions are being more than offset by income expected to be generated in higher tax jurisdictions.

Also increasing the provision for income taxes in the current year was the revaluation of the Company’s net deferred tax assets in Switzerland, which were originally established as part of the Swiss cantonal tax reform measures enacted in 2019. This revaluation resulted in a one-time deferred tax expense of $15.3 million recorded in the second quarter of 2022. This expense was partially offset by the release of a valuation allowance of $8.5 million during the second quarter of 2022, as a result of improvements in actual and projected future results in one of the Company’s subsidiaries in Luxembourg.

Net Income from Discontinued Operations, Net of Income Taxes

Net income from discontinued operations, net of income taxes during the six months ended June 30, 2021 was $24.3 million, and was related to the results and sale of our Synthetic Rubber business. There was no net income from discontinued operations, net of income taxes during the six months ended June 30, 2022. Refer to Note 4 in the condensed consolidated financial statements for further information.

36

Outlook

As the second quarter progressed, increased uncertainty due to the ongoing war in Ukraine and the associated increase in material and energy prices began to negatively influence demand in Europe. We are assuming this demand slowdown we’ve observed over the last two months will continue for the duration of the year putting downward pressure on styrene monomer margins in the region. Volume and margins for most of our derivative products will also be impacted by this downward pressure, particularly in building & construction and appliance applications. Therefore, we expect sequentially lower profitability in the second half of 2022.

As discussed within Liquidity and Capital Resources below, sharp increases in raw material prices, like benzene, along with record levels of energy prices led to a significant working capital build and cash flow use during the first half of 2022. In the second half of 2022, we expect a significant working capital release and positive cash flow from inventory control, expectations that raw material prices have largely peaked, and seasonally lower sales in the fourth quarter. We also expect to continue returning cash to our shareholders in the second half of 2022 via share repurchases and dividends.

Selected Segment Information

The following sections describe net sales, Adjusted EBITDA, and Adjusted EBITDA margin by segment for the three and six months ended June 30, 2022 and 2021. Inter-segment sales have been eliminated. Refer to Note 16 in the condensed consolidated financial statements for further information on our segments, as well as for a detailed definition of Adjusted EBITDA and a reconciliation of income from continuing operations before income taxes to segment Adjusted EBITDA.

Engineered Materials Segment

Our Engineered Materials segment consists of rigid thermoplastic compounds and blends products sold into high growth and high value applications in markets such as consumer electronics and medical, as well as soft thermoplastic elastomers (“TPEs”) products which are sold into markets such as footwear and automotive. The Engineered Materials segment also includes polymethyl methacrylates (“PMMA”) and activated methyl methacrylates (“MMA”) products, which are sold into a variety of applications including automotive, building & construction, medical, consumer electronics, and wellness, among others.

	Three Months Ended								Six Months Ended
	June 30,								June 30,
($ in millions)	2022			2021			% Change		2022			2021			% Change
Net sales	$	301.3		$	181.0		66	%	$	596.5		$	246.8		142	%
Adjusted EBITDA	$	34.0		$	27.8		22	%	$	68.7		$	35.8		92	%
Adjusted EBITDA margin		11	%		15	%				12	%		15	%

Three Months Ended – June 30, 2022 vs. June 30, 2021

The 66% increase in net sales was primarily attributable to the contribution from the PMMA business and the Aristech Surfaces acquisitions, which led to a 57% increase year-over-year. In addition, sales price, primarily from the pass through of higher raw materials and energy costs, increased net sales by 16%. These increases were partially offset by a 5% decrease due to lower sales volumes from reduced demand for products supporting consumer electronics and appliances following the strong demand conditions in the prior year, as well as COVID-19 related lockdowns in China in the current year.

Adjusted EBITDA increased $6.2 million, or 22%, year-over-year. Our recent acquisitions of the PMMA business and Aristech Surfaces contributed a $20.0 million, or 72%, increase from the prior year. This increase was partially offset by a $3.7 million, or 13%, decrease due to lower sales volume as described above, as well as a $10.6 million, or 38%, decrease due to lower margins, which included a one-time charge of approximately $4.0 million related to a contract review with a significant supplier.

37

Six Months Ended – June 30, 2022 vs. June 30, 2021

The 142% increase in net sales was primarily attributable to the contribution from the PMMA business and the Aristech Surfaces acquisitions, which led to a 135% increase year-over-year. In addition, sales price, primarily from the pass through of higher raw materials and energy costs, increased net sales by 17%. These increases were partially offset by a 9% decrease due to lower sales volumes as demand declined from very high levels in the prior year and also from COVID-19 lockdowns in China in the current year.

Adjusted EBITDA increased $32.9 million, or 92%, year-over-year. Our recent acquisitions of the PMMA business and Aristech Surfaces contributed a $51.2 million, or 143%, increase from the prior year. This increase was partially offset by a $7.2 million, or 20%, decrease due to lower sales volume as described above, as well as a $10.4 million, or 29%, decrease due to lower margins, which included a one-time charge of approximately $4.0 million related to a contract review with a significant supplier.

Latex Binders Segment

Our Latex Binders segment produces styrene-butadiene latex (“SB latex”) and other latex polymers and binders primarily for coated paper and packaging board, carpet and artificial turf backings, as well as a broad range of performance latex binders products, including SB latex, styrene-acrylate latex (“SA latex”), and vinylidene chloride latex for coatings, adhesives, sealants, and elastomers (“CASE”) applications.

	Three Months Ended								Six Months Ended
	June 30,								June 30,
($ in millions)	2022			2021			% Change		2022			2021			% Change
Net sales	$	353.7		$	311.2		14	%	$	660.4		$	562.2		17	%
Adjusted EBITDA	$	29.4		$	32.2		(9)	%	$	59.6		$	49.0		22	%
Adjusted EBITDA margin		8	%		10	%				9	%		9	%

Three Months Ended – June 30, 2022 vs. June 30, 2021

The 14% increase in net sales was primarily due to an 18% increase in pricing from the pass through of raw material costs, mainly styrene and butadiene, as well as pricing actions, slightly offset by a 4% decrease due to foreign exchange rate impacts.

The $2.8 million, or 9%, decrease in Adjusted EBITDA was primarily due to a decrease of $3.1 million, or 10%, due to foreign exchange rate impacts, slightly offset by an increase of $0.7 million, or 2%, due to higher sales volumes, specifically in North America to paper & board and CASE applications.

Six Months Ended – June 30, 2022 vs. June 30, 2021

The 17% increase in net sales was primarily due to a 23% increase in pricing from the pass through of raw material costs, mainly styrene and butadiene, as well as pricing actions, slightly offset by a 4% decrease due to foreign exchange rate impacts.

The $10.6 million, or 22%, increase in Adjusted EBITDA was primarily due to an increase of $19.2 million, or 39%, attributable to higher margins which was a result of favorable net timing and pricing actions. This increase was partially offset by a $4.9 million, or 10%, decrease due to foreign exchange rate impacts, as well as a $3.6 million, or 7%, decrease due to higher fixed costs.

38

Base Plastics Segment

Our Base Plastics segment consists of a variety of compounds and blends, the majority of which are for automotive applications. The segment also includes our acrylonitrile-butadiene-styrene (“ABS”), styrene-acrylonitrile (“SAN”), and polycarbonate (“PC”) businesses. The Base Plastics segment also includes the results of Heathland, which was acquired in the first quarter of 2022. However, this did not have a material impact on sales or Adjusted EBITDA for the period.

	Three Months Ended								Six Months Ended
	June 30,								June 30,
($ in millions)	2022			2021			% Change		2022			2021			% Change
Net sales	$	361.9		$	396.9		(9)	%	$	758.4		$	725.8		4	%
Adjusted EBITDA	$	46.1		$	82.0		(44)	%	$	114.7		$	147.5		(22)	%
Adjusted EBITDA margin		13	%		21	%				15	%		20	%

Three Months Ended – June 30, 2022 vs. June 30, 2021

Net sales decreased by 9% year-over-year, primarily due to lower sales volume, mainly in ABS, from softening demand to building & construction and appliance applications, which contributed to an 18% decrease. This decrease was partially offset by a 12% increase from higher pricing due to the pass through of raw material cost.

The $35.9 million, or 44%, decrease in Adjusted EBITDA was primarily due to a $22.5 million, or 27%, decrease from lower sales volumes as described above. In addition to lower sales volumes, Adjusted EBITDA decreased by $7.0 million, or 8%, due to a margin decline from higher raw material and utility costs and a softer demand environment. Foreign exchange rate impacts also contributed to a $4.7 million, or 6%, decrease.

Six Months Ended – June 30, 2022 vs. June 30, 2021

Net sales increased by 4% year-over-year. Higher pricing from the pass through of higher raw material costs led to a 20% increase in net sales from the prior year. This was partially offset by a 12% decrease due to lower sales volume from weaker demand to automotive and building & construction applications, as well as a 4% decrease due to foreign exchange rate impacts.

The $32.8 million, or 22%, decrease in Adjusted EBITDA was primarily due to lower sales volume of $28.4 million, or 19%, as described above. Also contributing to the overall decrease was unfavorable foreign exchange rate impacts of $9.1 million, or 6%, and a decrease of $7.0 million, or 5%, due to higher fixed costs. These decreases in Adjusted EBITDA were partially offset by higher margins of $10.9 million, or 7%.

Polystyrene Segment

Our product offerings in our Polystyrene segment include a variety of general purpose polystyrenes (“GPPS”) and polystyrene that has been modified with polybutadiene rubber to increase its impact resistant properties (“HIPS”). These products provide customers with performance and aesthetics at a low cost across applications, including appliances, packaging, including food packaging and food service disposables, consumer electronics, and building and construction materials. In April 2021, the Company announced our plans to build a full commercial scale polystyrene recycling plant in Tessenderlo, Belgium, which is expected to be operational in 2023.

	Three Months Ended								Six Months Ended
	June 30,								June 30,
($ in millions)	2022			2021			% Change		2022			2021			% Change
Net sales	$	312.0		$	313.3		(0)	%	$	630.0		$	580.1		9	%
Adjusted EBITDA	$	23.0		$	51.1		(55)	%	$	68.3		$	98.4		(31)	%
Adjusted EBITDA margin		7	%		16	%				11	%		17	%

39

Three Months Ended – June 30, 2022 vs. June 30, 2021

Net sales were essentially flat year-over-year. Higher pricing, primarily from the pass through of higher styrene costs, resulted in a $14.5 million, or 5%, increase in net sales. This increase was offset by lower volumes, caused by lower demand in China for appliances.

The $28.1 million, or 55%, decrease in Adjusted EBITDA was primarily due to a decrease of $28.4 million, or 56%, due to lower margins primarily from raw material volatility in Europe. In addition, a decrease of $4.0 million, or 8%, was due to lower volumes as described above. These effects were partially offset by an increase due to lower fixed costs of $3.5 million, or 7%.

Six Months Ended – June 30, 2022 vs. June 30, 2021

The 9% increase in net sales was due to higher pricing primarily from the pass through of higher styrene costs.

The $30.1 million, or 31%, decrease in Adjusted EBITDA was due to a decrease of $27.9 million, or 28%, from lower margins primarily from raw material volatility in Europe. In addition, a decrease of $5.0 million, or 5%, was due to lower volumes. These effects were partially offset by an increase of $2.0 million, or 2% due to favorable foreign exchange rate impacts.

Feedstocks Segment

The Feedstocks segment includes the Company’s production and procurement of styrene monomer outside of North America, which is used as a key raw material for the production of polystyrene, expandable polystyrene, SAN resins, SA latex, SB latex, ABS resins, unsaturated polyethylene resins, and styrene-butadiene rubber.

	Three Months Ended								Six Months Ended
	June 30,								June 30,
($ in millions)	2022			2021			% Change		2022			2021			% Change
Net sales	$	96.6		$	71.3		35	%	$	166.9		$	144.8		15	%
Adjusted EBITDA	$	14.2		$	39.8		(64)	%	$	18.3		$	86.1		(79)	%
Adjusted EBITDA margin		15	%		56	%				11	%		59	%

Three Months Ended – June 30, 2022 vs. June 30, 2021

The 35% increase in net sales was driven almost entirely from higher styrene prices.

The decrease of $25.6 million in Adjusted EBITDA was primarily attributed to a $29.6 million, or 74%, decrease due to lower styrene margins including impacts from higher utility costs caused by rise in natural gas prices in Europe. Slightly offsetting this decrease was an increase of $4.7 million, or 12%, due to foreign exchange impacts.

Six Months Ended – June 30, 2022 vs. June 30, 2021

Net sales increased 15% year-over-year. Higher styrene prices resulted in a 31% increase in net sales, which were partially offset by a 16% decrease due to lower styrene-related sales volume.

The decrease of $67.8 million in Adjusted EBITDA was primarily attributed to a $77.6 million, or 90%, decrease due to lower styrene margins including impacts from higher utility costs caused by a rise in natural gas prices in Europe. Slightly offsetting this decrease was an increase of $8.3 million, or 10%, due to foreign exchange rate impacts.

Americas Styrenics Segment

This segment consists solely of the equity earnings from of our 50%-owned joint venture, Americas Styrenics, a producer of both styrene monomer and polystyrene in North America. Styrene monomer is a basic building block of plastics and a key input to many of the Company’s products, as well as a key raw material for the production of polystyrene. Major applications for the polystyrene products Americas Styrenics produces include appliances, food packaging, food service disposables, consumer electronics, and building and construction materials.

40

	Three Months Ended						Six Months Ended
	June 30,						June 30,
($ in millions)	2022		2021		% Change		2022		2021		% Change
Adjusted EBITDA*	$	39.4	$	30.1	31	%	$	61.0	$	53.0	15	%

*The results of this segment are comprised entirely of earnings from Americas Styrenics, our equity method investment. As such, Adjusted EBITDA related to this segment is included within “Equity in earnings of unconsolidated affiliates” in the condensed consolidated statements of operations.

Three Months Ended – June 30, 2022 vs. June 30, 2021

The increase in Adjusted EBITDA was mainly due to higher styrene profitability, which was partially offset by lower sales volume that resulted from the styrene production outages in the current period.

Six Months Ended – June 30, 2022 vs. June 30, 2021

The increase in Adjusted EBITDA was mainly due to higher styrene profitability, which was partially offset by lower sales volume that resulted from the styrene production outages in the current period.

Non-GAAP Performance Measures

We present Adjusted EBITDA as a non-GAAP financial performance measure, which we define as income from continuing operations before interest expense, net; provision for income taxes; 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 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.

There are limitations to using the financial performance measures such as Adjusted EBITDA. This performance measure is not intended to represent net income or other measures of financial performance. As such, it should not be used as an alternative to net income as an indicator of operating performance. Other companies in our industry may define Adjusted EBITDA 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 performance of those companies to our performance. We compensate for these limitations by providing a reconciliation of this performance measure to our net income, which is determined in accordance with GAAP.

41

Adjusted EBITDA is calculated as follows for the three and six months ended June 30, 2022 and 2021:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in millions)	2022		2021		2022		2021
Net income	$	37.4	$	151.6	$	54.2	$	223.1
Net income from discontinued operations		0.3		18.6		—		24.3
Net income from continuing operations		37.1		133.0		54.2		198.8
Interest expense, net		25.4		21.6		47.3		33.6
Provision for income taxes		30.8		23.3		53.4		43.4
Depreciation and amortization		48.1		38.1		101.1		61.2
EBITDA(a)	$	141.4	$	216.0	$	256.0	$	337.0
Net gain on disposition of businesses and assets		(1.5)		—		(1.8)		(0.2)
Restructuring and other charges(b)		(1.5)		6.3		(1.0)		6.7
Acquisition transaction and integration net costs (c)		2.7		43.2		5.9		49.2
Acquisition purchase price hedge (gain) loss (d)		—		(33.0)		—		22.0
Asset impairment charges or write-offs(e)		1.3		1.8		2.0		1.8
European Commission request for information(f)		—		—		35.6		—
Other items(g)		22.1		4.8		45.4		6.9
Adjusted EBITDA	$	164.5	$	239.1	$	342.1	$	423.4

(a) EBITDA is a non-GAAP financial performance measure that we refer to in making operating decisions because we believe it provides our management as well as our investors and credit agencies 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. Other companies in our industry may define EBITDA differently than we do. As a result, it may be difficult to use EBITDA, 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 our EBITDA results to our net income, which is determined in accordance with GAAP.

(b) Restructuring and other charges for the three and six months ended June 30, 2022 and 2021 primarily relate to charges incurred in connection with the Company’s restructuring programs. Refer to Note 17 in the condensed consolidated financial statements for further information regarding restructuring activities.

(c) Amounts for the three and six months ended June 30, 2022 and 2021 relate to expenses incurred for the Company’s acquisition and integration of the PMMA business and Aristech Surfaces Acquisitions. Refer to Note 3 in the condensed consolidated financial statements for further information.

(d) Acquisition purchase price hedge (gain) loss for the three and six months ended June 30, 2021 was due to the change in fair value of the Company’s forward currency hedge arrangement on the euro-denominated purchase price of the PMMA business. Refer to Note 10 in the condensed consolidated financial statements for further information.

(e) Amount for the three and six months ended June 30, 2022 and 2021 primarily relate to the impairment of the Company’s styrene monomer assets in Boehlen, Germany, as described within Note 11 in the condensed consolidated financial statements.

(f) Amount for the six months ended June 30, 2022 relate to the estimated liability recorded in connection with the European Commission request for information, as described in Note 13 in the condensed consolidated financial statements.

42

(g) Other items for the three and six months ended June 30, 2022 and 2021 primarily relate to fees incurred in conjunction with certain of the Company’s strategic initiatives. The three and six months ended June 30, 2022 also include costs related to our transition to a new enterprise resource planning system.

Liquidity and Capital Resources

Cash Flows

The table below summarizes our primary sources and uses of cash for the three and six months ended June 30, 2022 and 2021. We have derived the summarized cash flow information from our unaudited financial statements.

	Six Months Ended
	June 30,
(in millions)	2022		2021
Net cash provided by (used in):
Operating activities - continuing operations	$	(88.9)	$	18.1
Operating activities - discontinued operations		0.8		11.9
Operating activities		(88.1)		30.0
Investing activities - continuing operations		(70.4)		(1,403.1)
Investing activities - discontinued operations		(0.8)		(2.4)
Investing activities		(71.2)		(1,405.5)
Financing activities		(140.8)		1,154.9
Effect of exchange rates on cash		(8.5)		(1.1)
Net change in cash, cash equivalents, and restricted cash	$	(308.6)	$	(221.7)

Operating Activities

Net cash used in operating activities from continuing operations during the six months ended June 30, 2022 totaled $88.9 million. Solid earnings, including $37.5 million of dividends received from Americas Styrenics, were more than offset by a significant working capital build during the quarter. This working capital build, and resulting negative impact on cash flow, was driven by a rapid and significant increase in raw material prices experienced in the first half of 2022, especially in benzene. Also contributing to the working capital build were historically high energy prices. Net cash provided by operating activities from discontinued operations during the six months ended June 30, 2022 totaled $0.8 million.

Net cash provided by operating activities from continuing operations during the six months ended June 30, 2021 totaled $18.1 million, driven by very strong earnings, and inclusive of dividends received from Americas Styrenics of $40.0 million. Partially offsetting these factors was a $235.2 million reduction in operating cash from net working capital changes during the period, which were primarily attributable to significant increases in raw material costs, including the cost of benzene in Europe nearly doubling from February to May, and an increase in inventory ahead of third quarter planned maintenance activities. Net cash provided by operating activities from discontinued operations during the six months ended June 30, 2021 totaled $11.9 million, which was also primarily attributable to raw material cost increases and higher inventory related to discontinued operations.

Investing Activities

Net cash used in investing activities from continuing operations during the six months ended June 30, 2022 totaled $70.4 million, which was primarily attributable to net cash paid for asset or business acquisitions of $22.2 million (see Note 3), and capital expenditures, including cash spent for our ongoing enterprise resource planning system upgrade, of $55.4 million. Net cash used in investing activities from discontinued operations during the six months ended June 30, 2022 totaled $0.8 million.

Net cash used in investing activities from continuing operations during the six months ended June 30, 2021 totaled $1,403.1 million, which was primarily attributable to net cash paid for asset or business acquisitions of $1,358.6 million, capital expenditures of $30.0 million, and payments for the settlement of hedging instruments of $14.7 million (related

43

to the acquisition purchase price hedge). Net cash used in investing activities from discontinued operations during the six months ended June 30, 2021 totaled $2.4 million, which was entirely attributable to capital expenditures.

Financing Activities

Net cash used in financing activities during the six months ended June 30, 2022 totaled $140.8 million. This activity was primarily due to $101.9 million of payments related to the repurchase of ordinary shares, $24.6 million of dividends paid, $7.5 million of net repayments of short-term borrowings, and $7.2 million of net principal payments related to our 2024 Term Loan B and 2028 Term Loan B during the period.

Net cash provided by financing activities during the six months ended June 30, 2021 totaled $1,154.9 million. This activity was primarily due to $746.3 million in proceeds from the issuance of the 2028 Term Loan B, $450.0 million in proceeds from the issuance of the 2029 Senior Notes, and $10.5 million in proceeds from exercise of option awards. This activity was partially offset by $35.0 million of deferred financing fees primarily related to the issuance of our 2028 Term Loan, $6.4 million of dividend payments, $6.2 million of net repayments of short-term borrowings, and $3.5 million of net principal payments related to our 2024 Term Loan B during the period.

Free Cash Flow

We use Free Cash Flow as a non-GAAP measures to evaluate and discuss the Company’s 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 indicator 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 an alternative 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. We compensate for these limitations by providing a reconciliation to cash provided by operating activities from continuing operations, which is determined in accordance with GAAP.

	Six Months Ended
	June 30,
(in millions)	2022		2021
Cash provided by (used in) operating activities	$	(88.1)	$	30.0
Capital expenditures		(56.2)		(32.4)
Free Cash Flow	$	(144.3)	$	(2.4)

Refer to the discussion above for significant impacts to cash provided by operating activities for the six months ended June 30, 2022 and 2021.

Capital Resources and Liquidity

We require cash principally for day-to-day operations, to finance capital investments and other initiatives, to purchase materials, to service our outstanding indebtedness, and to fund the return of capital to shareholders via dividend payments and ordinary share repurchases, when deemed appropriate. Our sources of liquidity include cash on hand, cash flow from operations from continuing operations, and amounts available under the Senior Credit Facility and the Accounts Receivable Securitization Facility (discussed further below).

At June 30, 2022 and December 31, 2021, we had $2,360.5 million and $2,368.8 million, respectively, in outstanding indebtedness and $1,050.5 million and $1,064.1 million, respectively, in working capital (calculated as current assets from continuing operations less current liabilities from continuing operations). In addition, as of June 30, 2022 and December 31, 2021, we had $262.7 million and $560.6 million, respectively, of foreign cash and cash equivalents on our balance sheet, outside of Ireland, our country of domicile, all of which is readily convertible into

44

other foreign currencies, including the U.S. dollar. Our intention is not to permanently reinvest our foreign cash and cash equivalents. Accordingly, we record deferred income tax liabilities related to the unremitted earnings of our subsidiaries.

The following table outlines our outstanding indebtedness as of June 30, 2022 and December 31, 2021 and the associated interest expense, including amortization of deferred financing fees and debt discounts. Effective interest rates for the borrowings included in the table below exclude the impact of deferred financing fee amortization, certain other fees charged to interest expense (such as fees for unused commitment fees during the period), and the impacts of derivatives designated as hedging instruments. For definitions of capitalized terms not included herein, refer to our Annual Report on Form 10-K (“Annual Report”).

	As of and for the Six Months Ended						As of and for the Year Ended
	June 30, 2022						December 31, 2021
			Effective						Effective
			Interest		Interest				Interest		Interest
($ in millions)	Balance		Rate		Expense		Balance		Rate		Expense
Senior Credit Facility
2024 Term Loan B	$	666.9	2.5	%	$	11.0	$	670.4	2.1	%	$	20.6
2028 Term Loan B		739.3	3.0	%		12.6		742.8	2.6	%		15.2
2026 Revolving Facility		—	—	%		0.9		—	—	%		2.1
2029 Senior Notes		450.0	5.1	%		12.4		450.0	5.1	%		19.0
2025 Senior Notes		500.0	5.4	%		11.7		500.0	5.4	%		20.7
Accounts Receivable Securitization Facility		—	—	%		0.7		—	2.0	%		1.8
Other indebtedness*		4.3	0.8	%		—		5.6	2.2	%		—
Total	$	2,360.5			$	49.3	$	2,368.8			$	79.4

*For the six months ended June 30, 2022, interest expense on “Other indebtedness” totaled less than $0.1 million.

As of June 30, 2022, our Senior Credit Facility included the 2026 Revolving Facility, which is scheduled to mature in May 2026 and had a borrowing capacity of $375.0 million. As of June 30, 2022, the Company had $368.9 million of funds available for borrowing (net of $6.1 million outstanding letters of credit) under the 2026 Revolving Facility. Further, as of June 30, 2022, the Company is required to pay a quarterly commitment fee in respect of any unused commitments under the 2026 Revolving Facility equal to 0.375% per annum.

Also included in our Senior Credit Facility is our 2024 Term Loan B (with original principal of $700.0 million, maturing in September 2024), and our 2028 Term Loan B (with original principal of $750.0 million, maturing in May 2028).

Our 2025 Senior Notes, as issued under the Indenture executed in 2017, include $500.0 million aggregate principal amount of 5.375% senior notes that mature on September 1, 2025.

Our 2029 Senior Notes, as issued under the Indenture executed in 2021, include $450.0 million aggregate principal amount of 5.125% senior notes that mature on April 1, 2029.

We also continue to maintain our Accounts Receivable Securitization Facility, which matures in November 2024 and has an outstanding borrowing capacity of $150.0 million. As of June 30, 2022, there were no amounts outstanding under this facility and the Company had approximately $150.0 million of accounts receivable available to support this facility, based on the pool of eligible accounts receivable. Refer to Note 8 in the consolidated financial statements for further information on the facility.

Our ability to raise additional financing and our borrowing costs may be impacted by short- and long-term debt ratings assigned by independent rating agencies, which are based, in significant part, on our performance as measured by certain credit metrics such as interest coverage and leverage ratios.

We and our subsidiaries, affiliates or significant shareholders may from time to time seek to retire or purchase our outstanding debt through cash purchases in the open market, privately negotiated transactions, exchange transactions or

45

otherwise. Such repurchases or exchanges, if any, will depend on prevailing market conditions, our liquidity requirements, contractual restrictions and other factors. The amounts involved may be material.

Trinseo Materials Operating S.C.A. and Trinseo Materials Finance, Inc. (the “Issuers” of our 2029 Senior Notes and 2025 Senior Notes and “Borrowers” under our Senior Credit Facility) are dependent upon the cash generation and receipt of distributions and dividends or other payments from our subsidiaries and joint venture in order to satisfy their debt obligations. There are no known significant restrictions by third parties on the ability of subsidiaries of the Company to disburse or dividend funds to the Issuers and the Borrowers in order to satisfy these obligations. However, as the Company’s subsidiaries are located in a variety of jurisdictions, the Company can give no assurances that our subsidiaries will not face transfer restrictions in the future due to regulatory or other reasons beyond our control.

The Senior Credit Facility and Indentures also limit the ability of the Borrowers and Issuers, respectively, to pay dividends or make other distributions to Trinseo PLC, which could then be used to make distributions to shareholders. During the six months ended June 30, 2022, the Company declared dividends of $0.64 per ordinary share, totaling $23.9 million, of which $12.8 million was accrued as of June 30, 2022, the majority of which was paid in July 2022. These dividends are well within the available capacity under the terms of the restrictive covenants contained in the Senior Credit Facility and Indentures. Further, additional capacity continues to be available under the terms of these covenants to support expected future dividends to shareholders, should the Company continue to declare them.

Our ability to generate cash from operations to pay our indebtedness and meet other liquidity needs is subject to certain risks described herein and under Part I, Item 1A-“Risk Factors” of our Annual Report, as well as the risk factors included in Part II, Item 1A herein. As of June 30, 2022, we were in compliance with all the covenants and default provisions under our debt agreements. Refer to our Annual Report for further information on the details of the covenant requirements.

The ongoing war in Ukraine and the corresponding sanctions and other measures being imposed by various governments have impacted global markets, particularly in Europe, leading to: (i) high volatility and increasing prices for natural gas and other energy supplies, (ii) changing trade flow patterns, and (iii) increasing levels of economic and geopolitical uncertainty globally. We do not have manufacturing operations in Ukraine, Russia or Belarus, and we have temporarily suspended sales and deliveries to Russia and Belarus, which sales do not constitute a material portion of our business. However, a significant escalation or expansion of economic disruption caused by this conflict, including supply disruptions, higher costs of raw materials or energy could have a material adverse effect on our results of operations, financial condition and cash flows. We are actively monitoring the broader economic impact from the crisis, in particular on the price and availability of raw materials and energy.

Contractual Obligations and Commercial Commitments

There have been no material revisions outside the ordinary course of business to our contractual obligations as described within “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Contractual Obligations and Commercial Commitments” within our Annual Report.

Critical Accounting Policies and Estimates

Our unaudited interim condensed consolidated financial statements are based on the selection and application of significant accounting policies. The preparation of unaudited interim condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and revenues and expenses at the date of and during the reporting period. Actual results could differ from those estimates. However, we are not currently aware of any reasonably likely events or circumstances that would result in materially different results.

We describe our significant accounting policies in Note 2, Basis of Presentation and Summary of Significant Accounting Policies, in the Notes to Consolidated Financial Statements included in our Annual Report, while we discuss our critical accounting policies and estimates in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” within our Annual Report. There have been no material revisions to the significant accounting policies or critical accounting policies and estimates as filed in our Annual Report.

46

Off-Balance Sheet Arrangements

We do not have any off-balance sheet arrangements.

Recent Accounting Pronouncements

We describe the impact of recent accounting pronouncements in Note 2 of our condensed consolidated financial statements, included elsewhere within this Quarterly Report.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

As discussed in “Quantitative and Qualitative Disclosures About Market Risk” within our Annual Report, we are exposed to changes in interest rates and foreign currency exchange rates as well as changes in the prices of certain commodities that we use in production. There have been no material changes in our exposure to market risks from the information provided within our Annual Report.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management is responsible for establishing and maintaining internal controls designed to provide reasonable assurance that information required to be disclosed by us in our reports that we file or submit under the Exchange Act (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as amended) is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, with the participation of our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosures. Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of the Company’s disclosure controls and procedures as of June 30, 2022. Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures as of the end of the period covered by this Quarterly Report were effective to provide the reasonable level of assurance described above.

Changes in Internal Control over Financial Reporting

As discussed in Note 3 to the condensed consolidated financial statements, in May 2021, the Company completed the PMMA Acquisition. As permitted by the SEC, management elected to exclude this acquisition from its assessment of the effectiveness of its internal control over financial reporting as of December 31, 2021. In May 2022, the Company completed the integration of the PMMA business into its internal control environment. Otherwise, there were no additional changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act) that occurred during the quarter ended June 30, 2022 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

PART II — OTHER INFORMATION

Item 1. Legal Proceedings

From time to time we may be subject to various legal claims and proceedings incidental to the normal conduct of business, relating to such matters as product liability, antitrust, competition, waste disposal practices, release of chemicals into the environment and other matters that may arise in the ordinary course of our business. Other than the European Commission request for information described in Note 13 – Commitments and Contingencies, we currently believe that there is no litigation pending that is likely to have a material adverse effect on our business. Regardless of the outcome, legal proceedings can have an adverse impact on us because of defense and settlement costs, diversion of management resources and other factors. For information regarding material developments in legal proceedings during the quarter ended June 30, 2022, see “Litigation Matters” and “European Commission Request for Information” in Note 13 to our condensed consolidated financial statements.

47

Item 1A. Risk Factors

Our business faces various risks. Certain important factors may have a material adverse effect on our business prospects, financial condition and results of operations, and you should carefully consider them. Accordingly, in evaluating our business, we encourage you to consider the risk factors related to our ordinary shares as well those risk factors related to our business and industry which have been previously disclosed in Part 1, Item 1A of our Annual Report for the year ended December 31, 2021. Certain material updates to these risk factors are included below.

We encourage you to consider these risks, in their entirety, in addition to other information contained in or incorporated by reference into this Quarterly Report and our other public filings with the SEC. Other events that we do not currently anticipate or that we currently deem immaterial may also affect our business, prospects, financial condition and results of operations.

Risks Related to Our Operations

Volatility in the cost of raw materials, logistics services, or transportation utilized for our products, or disruption in the supply of the raw materials utilized for our products, may adversely affect our financial condition and results of operations or cause our financial results to differ materially from our forecasts.

Our results of operations can be directly affected, positively and negatively, by volatility in the cost of our raw materials, which are subject to global supply and demand and other factors beyond our control. Our principal raw materials (benzene, ethylene, butadiene, BPA, MMA, and styrene) together represent approximately 81% of our total cost of goods sold. Crude oil prices also impact our raw material and energy costs. Generally, higher crude oil prices lead to higher costs of natural gas and raw materials, although some raw materials are impacted less than others. Volatility in the cost of energy or raw materials makes it more challenging to manage pricing and pass the increases on to our customers in a timely manner. We believe that rapid changes in pricing also can affect the volume our customers consume. As a result, our gross profit and margins could also be adversely affected and our financial results may differ materially from our forecasts.

We are dependent on third-party freight carriers to transport many of our products. Our access to third-party freight carriers is not guaranteed, and we may be unable to transport our products at economically attractive rates in certain circumstances, particularly during disruptions to transportation infrastructure. Our business, financial position, results of operations or cash flows could be materially and adversely affected if we are unable to pass all of the cost increases on to our customers, or if freight carrier capacity in our geographic markets were to decline significantly or otherwise become unavailable.

We have supply agreements with Dow for ethylene, benzene, butadiene, and MMA, which are critical raw materials to our business. These raw materials and other less critical materials amount to approximately 22% of our total raw materials acquired in 2021, based on aggregate purchase price. The remainder is purchased via other third-party suppliers on a global basis. As these and other third-party supply agreements expire, we may be unable to renegotiate or renew these contracts, or obtain new long-term supply agreements on terms comparable or favorable to us, or at all, which may significantly impact our operations. See Part 1, Item 1—Business— Sources and Availability of Raw Materials of our Annual Report for the year ended December 31, 2021 for additional information.

If the availability of any of our principal raw materials is limited, we may be unable to produce some of our products in the quantities demanded by our customers, which could have an adverse effect on plant utilization and our sales of products requiring such raw materials. Suppliers may have temporary limitations preventing them from meeting our requirements, and we may not be able to obtain substitute alternative suppliers in a timely manner or on favorable terms.

Continued supply constraints and increases in the cost of energy, including as a result of the ongoing conflict in Ukraine, could adversely impact our results of operations.

We use natural gas and electricity to operate our facilities and generate heat and steam for our various manufacturing processes, and these operations can be directly affected by volatility in the cost and availability of energy, which is often subject to factors outside of our control. The ongoing conflict between Russia and Ukraine has impacted global energy markets, particularly in Europe, leading to high volatility and increased prices for natural gas and other

48

energy supplies. Reductions in the supply of natural gas from Russia to Europe has led to ongoing supply shortages in Europe, and European Union member states have recently agreed to a voluntary short-term reduction of natural gas usage as a result of these shortages. Continued natural gas supply shortages, or a shutdown of natural gas supply from Russia, could lead to additional price increases, energy supply rationing, or temporary reduction in operations or closure of our manufacturing plants, which could have a material adverse impact on our business or results of operations.

Risks Related to Regulation

Trinseo Europe GmbH, one of our subsidiaries, received a Request for Information from the European Commission Directorate General for Competition, involving commercial activity for styrene monomer. To the extent the European Commission’s inquiry would lead to a finding that the Company’s subsidiary violated the law, the results of this finding could have a material adverse effect on our business, financial condition, results of operations, and cash flows.

On June 6, 2018, Trinseo Europe GmbH, a subsidiary of the Company, received a Request for Information in the form of a letter from the European Commission Directorate General for Competition (the “European Commission”) related to styrene monomer commercial activity in the European Economic Area. In addition, the Company commenced an internal investigation into the matter and has discovered instances of inappropriate activity. We have provided all information requested and continue to fully cooperate with the Request for Information.

As a result of further developments in this matter, during the first quarter of 2022, the Company recorded a reserve for an estimated liability of $35.6 million, which remains ongoing and the outcome of which remains unknown. Trinseo Europe GmbH may be subject to fines and/or certain behavioral or structural commitments imposed by the European Commission. If Trinseo Europe GmbH is found to have violated one or more laws, it could also be subject to additional actions by local competition authorities. European Commission inquiries or investigations can continue over a long period of time, which can divert the attention of our management from day-to-day operations and impose significant administrative burdens. Any of these consequences could damage our reputation and impair our ability to conduct business, which could have a material adverse effect on our business, financial condition, results of operations, and cash flows.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

(a) Recent sales of unregistered securities

None.

(b) Use of Proceeds from registered securities

None.

(c) Purchases of Equity Securities by the Issuer and Affiliated Purchasers

The following table contains information regarding purchases of our ordinary shares made during the quarter ended June 30, 2022 by or on behalf of the Company or any “affiliated purchaser,” as defined by Rule 10b-18(a)(3) of the Secuirites Exchange Act of 1934:

Issuer Purchases of Equity Securities
Period	Total number of shares purchased	Average price paid per share		Total number of shares purchased as part of publicly announced plans or programs	Approximate number of shares that may yet be purchased under the plans or programs
April 1 - April 30, 2022	1,026,963	$	48.69	1,026,963	1,201,833	(1)​
May 1 - May 31, 2022	—	$	—	—	—	(1)​
June 1 - June 30, 2022	—	$	—	—	—	(1)​
Total	1,026,963	$	—	1,026,963

(1) On December 2, 2021, the board of directors of the Company unanimously approved the authorization of a share repurchase program where the Company may repurchase up to $200.0 million of our ordinary shares,

49

subject to certain parameters defined by the board of directors. The repurchase authorization expires after 18 months and repurchases may be effected through open market purchases, 10b5-1 plans or by other means.

Approximate number of shares that may yet be purchased under the plan is calculated using the average price paid per share during the quarter.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

None.

Item 6. Exhibits

See Exhibit Index.

50

EXHIBIT INDEX

Exhibit  No.	Description
3.1	Memorandum and Articles of Association of Trinseo PLC, as amended (incorporated herein by reference to Exhibit 3.1 to the Current Report on Form 8-K, filed on June 17, 2022).
4.1	Indenture among Trinseo Materials Operating S.C.A., Trinseo Materials Finance, Inc. and The Bank of New York Mellon, as Trustee, dated as of August 29, 2017 (incorporated herein by reference to Exhibit 4.1 to the Current Report on Form 8-K, filed September 5, 2017).
4.2	Indenture among Trinseo Materials Operating S.C.A., Trinseo Materials Finance, Inc. and The Bank of New York Mellon, as Trustee, dated as of March 24, 2021 (incorporated by reference to Exhibit 4.1 to the Current Report on Form 8-K filed March 24, 2021).
10.1*†	Amendment, dated May 9, 2022, to the Employment Agreement between Trinseo LLC and Frank Bozich dated December 11, 2018.
10.2*†	Amendment, dated May 9, 2022, to the Employment Agreement between Trinseo LLC and David Stasse dated April 29, 2019.
10.3*†	Amendment, dated May 9, 2022, to the Employment Agreement between Trinseo LLC and Angelo Chaclas dated January 1, 2020.
10.4*†	Amendment, dated May 9, 2022, to the Employment Agreement between Trinseo Europe GmbH and Andre Lanning dated October 1, 2021.
10.5*†	Amendment, dated May 9, 2022, to the Employment Agreement between Trinseo Europe GmbH and Francesca Reverberi dated October 1, 2021.
10.6*	Trinseo PLC Amended and Restated 2014 Omnibus Incentive Plan (incorporated herein by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on June 17, 2022).
31.1†	Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2†	Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1†	Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2†	Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS†	XBRL Instance Document – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.SCH†	XBRL Taxonomy Extension Schema Document
101.CAL†	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF†	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB†	XBRL Taxonomy Extension Label Linkbase Document
101.PRE†	XBRL Taxonomy Extension Presentation Linkbase Document
104†	Cover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101)

* Compensatory plan or arrangement.

† Filed herewith.

SIGNATURES

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, duly authorized.

Date: August 9, 2022

TRINSEO PLC
By:	/s/ Frank Bozich
Name:	Frank Bozich
Title:	President, Chief Executive Officer
	(Principal Executive Officer)
By:	/s/ David Stasse
Name:	David Stasse
Title:	Executive Vice President, Chief Financial Officer
	(Principal Financial Officer)

EX-10.1

	Exhibit 10.1
	Trinseo PLC 76 Sir John Rogerson’s Quay Dublin 2 D02 FX51, Ireland

Frank A. Bozich

President and Chief Executive Officer

May 9, 2022

Dear Frank,

We are advising you of a change in your Change of Control benefit under your employment contract with Trinseo PLC or its affiliate.  Basically, the change increases the severance amount from 24 months to 36 months provided all other conditions of this benefit are met.  More particularly, please note that the double trigger elements both still apply.

A side-by-side comparison of the change is provided below:

Current Change in Control Severance - Section 8(e)

New Change in Control Severance - Section 8(e)

(i)This Section 8(e) shall apply if the Executive’s employment by the Company is terminated (x) by the Company other than for Cause pursuant to Section 7(d) hereof, or (y) by the Executive for Good Reason, in either case, during the Employment Term and the two (2)-year period commencing upon a Change in Control. Subject to the Executive’s not engaging in a Material Covenant Violation or a Material Cooperation Violation, upon a termination described in the preceding sentence, the Executive shall receive the benefits set forth in Section 8(d)(i), (ii) and (iii), except that in lieu of receiving the Severance Amount, as applicable, in installments as contemplated under Section 8(d)(ii), the Executive shall receive a lump sum payment equal to the applicable Severance Amount, on the date of such termination; provided that to the extent that the payment of the applicable amount constitutes “nonqualified deferred compensation” for purposes of Code Section 409A, such payment shall be made on the sixtieth (60th) day following such termination.

(i) This Section 8(e) shall apply if the Executive’s employment by the Company is terminated (x) by the Company other than for Cause pursuant to Section 7(d) hereof, or (y) by the Executive for Good Reason, in either case, during the Employment Term and the two (2)-year period commencing upon a Change in Control. Subject to the Executive’s not engaging in a Material Covenant Violation or a Material Cooperation Violation, upon a termination described in the preceding sentence, the Executive shall receive the benefits set forth in Section 8(d)(i), (ii) and (iii), except that: (i) the Severance Amount shall be three (3.0) multiplied by the annual sum of the Executive’s Base Salary and Target Bonus in effect for the then-current year of termination, and (ii)  in lieu of receiving the Severance Amount, as applicable, in installments; the Executive shall receive a lump sum payment equal to the applicable Severance Amount, on the date of such termination; provided that to the extent that the payment of the applicable amount constitutes “nonqualified deferred compensation” for purposes of Code Section 409A, such payment shall be made on the sixtieth (60th) day following such termination.

By way of this letter amendment, we propose deleting current Section 8(e)(i) and replacing it with new Section 8(e)(i). There are no other changes to your employment contract.  All other terms and conditions remain unchanged.

Please return your acceptance at your earliest convenience.

Best regards,

2
Signature:  /s/ Angelo N. Chaclas	Signature:  /s/ Paula Cooney
Name:Angelo N. Chaclas	Name:Paula Cooney
Title:S.V.P., Chief Legal Officer	Title:S.V.P., Chief Human Resources Officer
Date:5-11-2022	Date:5-11-2022

<REMAINDER OF PAGE INTENTIALLY BLANK – SIGNATURE PAGE TO FOLLOW>

Trinseo PLC 76 Sir John Rogerson’s Quay Dublin 2 D02 FX51, Ireland

I have read this letter amendment, understand it, and agree to the terms set forth above:

Date: 5-10-2022Signature: /s/ Frank A. Bozich

Frank A. Bozich

Page 2 of 2

EX-10.2

	Exhibit 10.2
	Trinseo PLC 76 Sir John Rogerson’s Quay Dublin 2 D02 FX51, Ireland

May 9, 2022

David Stasse

E.V.P., Chief Financial Officer

Dear Dave,

We are pleased to confirm a change in your Change of Control benefit under your employment contract with Trinseo PLC or its affiliate.  Basically, the change increases the severance amount from 18 months to 24 months provided all other conditions of this benefit are met.  More particularly, please note that the double trigger elements both still apply.

A side-by-side comparison of the change is provided below:

Current Change in Control Severance - Section 8(e)

New Change in Control Severance - Section 8(e)

(i)This Section 8(e) shall apply if the Executive’s employment by the Company is terminated (x) by the Company other than for Cause pursuant to Section 7(d) hereof, or (y) by the Executive for Good Reason, in either case, during the Employment Term and the two (2)-year period commencing upon a Change in Control. Subject to the Executive’s not engaging in a Material Covenant Violation or a Material Cooperation Violation, upon a termination described in the preceding sentence, the Executive shall receive the benefits set forth in Section 8(d)(i), (ii) and (iii), except that in lieu of receiving the Severance Amount, as applicable, in installments as contemplated under Section 8(d)(ii), the Executive shall receive a lump sum payment equal to the applicable Severance Amount, on the date of such termination; provided that to the extent that the payment of the applicable amount constitutes “nonqualified deferred compensation” for purposes of Code Section 409A, such payment shall be made on the sixtieth (60th) day following such termination.

(i) This Section 8(e) shall apply if the Executive’s employment by the Company is terminated (x) by the Company other than for Cause pursuant to Section 7(d) hereof, or (y) by the Executive for Good Reason, in either case, during the Employment Term and the two (2)-year period commencing upon a Change in Control. Subject to the Executive’s not engaging in a Material Covenant Violation or a Material Cooperation Violation, upon a termination described in the preceding sentence, the Executive shall receive the benefits set forth in Section 8(d)(i), (ii) and (iii), except that: (i) the Severance Amount shall be two (2.0) multiplied by the annual sum of the Executive’s Base Salary and Target Bonus in effect for the then-current year of termination, and (ii)  in lieu of receiving the Severance Amount, as applicable, in installments; the Executive shall receive a lump sum payment equal to the applicable Severance Amount, on the date of such termination; provided that to the extent that the payment of the applicable amount constitutes “nonqualified deferred compensation” for purposes of Code Section 409A, such payment shall be made on the sixtieth (60th) day following such termination.

By way of this letter amendment, we propose deleting current Section 8(e)(i) and replacing it with new Section 8(e)(i). There are no other changes to your employment contract.  All other terms and conditions remain unchanged.

Please return your acceptance at your earliest convenience.

Best regards,

Signature:  /s/ Frank A. Bozich	Signature:  /s/ Paula Cooney
Name:Frank A. Bozich	Name:Paula Cooney
Title:President & Chief Executive Officer	Title:S.V.P., Chief Human Resources Officer
Date:5-11-2022	Date:5-11-2022

<REMAINDER OF PAGE INTENTIALLY BLANK – SIGNATURE PAGE TO FOLLOW>

Trinseo PLC 76 Sir John Rogerson’s Quay Dublin 2 D02 FX51, Ireland

I have read this letter amendment, understand it, and agree to the terms set forth above:

Date: 5/15/2022Signature: /s/ David Stasse

David Stasse

Page 2 of 2

EX-10.3

	Exhibit 10.3
	Trinseo PLC 76 Sir John Rogerson’s Quay Dublin 2 D02 FX51, Ireland

May 9, 2022

Angelo N. Chaclas

S.V.P., Chief Legal Officer

Dear Angelo,

We are pleased to confirm a change in your Change of Control benefit under your employment contract with Trinseo PLC or its affiliate.  Basically, the change increases the severance amount from 18 months to 24 months provided all other conditions of this benefit are met.  More particularly, please note that the double trigger elements both still apply.

A side-by-side comparison of the change is provided below:

Current Change in Control Severance - Section 8(e)

New Change in Control Severance - Section 8(e)

(i)This Section 8(e) shall apply if the Executive’s employment by the Company is terminated (x) by the Company other than for Cause pursuant to Section 7(d) hereof, or (y) by the Executive for Good Reason, in either case, during the Employment Term and the two (2)-year period commencing upon a Change in Control. Subject to the Executive’s not engaging in a Material Covenant Violation or a Material Cooperation Violation, upon a termination described in the preceding sentence, the Executive shall receive the benefits set forth in Section 8(d)(i), (ii) and (iii), except that in lieu of receiving the Severance Amount, as applicable, in installments as contemplated under Section 8(d)(ii), the Executive shall receive a lump sum payment equal to the applicable Severance Amount, on the date of such termination; provided that to the extent that the payment of the applicable amount constitutes “nonqualified deferred compensation” for purposes of Code Section 409A, such payment shall be made on the sixtieth (60th) day following such termination.

(i) This Section 8(e) shall apply if the Executive’s employment by the Company is terminated (x) by the Company other than for Cause pursuant to Section 7(d) hereof, or (y) by the Executive for Good Reason, in either case, during the Employment Term and the two (2)-year period commencing upon a Change in Control. Subject to the Executive’s not engaging in a Material Covenant Violation or a Material Cooperation Violation, upon a termination described in the preceding sentence, the Executive shall receive the benefits set forth in Section 8(d)(i), (ii) and (iii), except that: (i) the Severance Amount shall be two (2.0) multiplied by the annual sum of the Executive’s Base Salary and Target Bonus in effect for the then-current year of termination, and (ii)  in lieu of receiving the Severance Amount, as applicable, in installments; the Executive shall receive a lump sum payment equal to the applicable Severance Amount, on the date of such termination; provided that to the extent that the payment of the applicable amount constitutes “nonqualified deferred compensation” for purposes of Code Section 409A, such payment shall be made on the sixtieth (60th) day following such termination.

By way of this letter amendment, we propose deleting current Section 8(e)(i) and replacing it with new Section 8(e)(i). There are no other changes to your employment contract.  All other terms and conditions remain unchanged.

Please return your acceptance at your earliest convenience.

Best regards,

Signature:  /s/ Frank A. Bozich	Signature:  /s/ Paula Cooney
Name:Frank A. Bozich	Name:Paula Cooney
Title:President & Chief Executive Officer	Title:S.V.P., Chief Human Resources Officer
Date:5-11-2022	Date:5-11-2022

<REMAINDER OF PAGE INTENTIALLY BLANK – SIGNATURE PAGE TO FOLLOW>

Trinseo PLC 76 Sir John Rogerson’s Quay Dublin 2 D02 FX51, Ireland

I have read this letter amendment, understand it, and agree to the terms set forth above:

Date: 5/13/2022Signature: /s/ Angelo N. Chaclas

Angelo N. Chaclas

Page 2 of 2

EX-10.4

	Exhibit 10.4
	Trinseo PLC 76 Sir John Rogerson’s Quay Dublin 2 D02 FX51, Ireland

May 9, 2022

Andre Lanning

S.V.P., Chief Commercial Officer

Dear Andre,

We are pleased to confirm a change in your Change of Control benefit under your employment contract with Trinseo PLC or its affiliate.  Basically, the change increases the severance amount from 18 months to 24 months provided all other conditions of this benefit are met.  More particularly, please note that the double trigger elements both still apply.

A side-by-side comparison of the change is provided below:

Current Change in Control Severance - Section 7(d)

New Change in Control Severance - Section 7(d)

(i)(i)          This Section 7(d) shall apply if the Executive's employment by the Company is terminated (x) by the Company other than for Cause, or (y) by the Executive for good reason as defined in art. 340c para 2 CO, in either case, during the two (2)-year period commencing upon a Change in Control. Subject to the Executive's not engaging in a Material Covenant Violation or a Material Cooperation Violation, upon a termination described in the preceding sentence, the Executive shall receive the benefits set forth in Section 7(c) hereof, except that in lieu of receiving the Severance Amount in installments as contemplated under Section 7(c)(ii) hereof, the Executive shall receive a lump sum payment equal to the Severance Amount on the date of such termination.

(i)This Section 7(d) shall apply if the Executive's employment by the Company is terminated (x) by the Company other than for Cause, or (y) by the Executive for good reason as defined in art. 340c para 2 CO, in either case, during the two (2)-year period commencing upon a Change in Control.   Subject to the Executive's not engaging in a Material Covenant Violation or a Material Cooperation Violation, upon a termination described in the preceding sentence, the Executive shall receive thebenefits set forth in Section 7(c) hereof, except that (i) the Severance Amount shall be two (2.0) multiplied by the annual sum of the Executive’s Base Salary and Target Bonus in effect for the then-current year of termination, and (ii)  in lieu of receiving the Severance Amount in installments as contemplated under Section 7(c)(ii) hereof, the Executive shall receive a lump sum payment equal to the Severance Amount on the date of such termination.

By way of this letter amendment, we propose deleting current Section 7(d)(i) and replacing it with new Section 7(d)(i). There are no other changes to your employment contract.  All other terms and conditions remain unchanged.

Please return your acceptance at your earliest convenience.

Best regards,

Signature:  /s/ Frank A. Bozich	Signature:  /s/ Paula Cooney
Name:Frank A. Bozich	Name:Paula Cooney
Title:President & Chief Executive Officer	Title:S.V.P., Chief Human Resources Officer
Date:5-20-2022	Date:5-20-2022

<REMAINDER OF PAGE INTENTIALLY BLANK – SIGNATURE PAGE TO FOLLOW>

Trinseo PLC 76 Sir John Rogerson’s Quay Dublin 2 D02 FX51, Ireland

I have read this letter amendment, understand it, and agree to the terms set forth above:

Date: 5/23/2022Signature: /s/ Andre Lanning

Andre Lanning

Page 2 of 2

EX-10.5

	Exhibit 10.5
	Trinseo PLC 76 Sir John Rogerson’s Quay Dublin 2 D02 FX51, Ireland

May 9, 2022

Francesca Reverberi

S.V.P., Chief Sustainability Officer

Dear Francesca,

We are pleased to confirm a change in your Change of Control benefit under your employment contract with Trinseo PLC or its affiliate.  Basically, the change increases the severance amount from 18 months to 24 months provided all other conditions of this benefit are met.  More particularly, please note that the double trigger elements both still apply.

A side-by-side comparison of the change is provided below:

Current Change in Control Severance - Section 7(d)

New Change in Control Severance - Section 7(d)

(i)          This Section 7(d) shall apply if the Executive's employment by the Company is terminated (x) by the Company other than for Cause, or (y) by the Executive for good reason as defined in art. 340c para 2 CO, in either case, during the two (2)-year period commencing upon a Change in Control. Subject to the Executive's not engaging in a Material Covenant Violation or a Material Cooperation Violation, upon a termination described in the preceding sentence, the Executive shall receive the benefits set forth in Section 7(c) hereof, except that in lieu of receiving the Severance Amount in installments as contemplated under Section 7(c)(ii) hereof, the Executive shall receive a lump sum payment equal to the Severance Amount on the date of such termination.

(i)This Section 7(d) shall apply if the Executive's employment by the Company is terminated (x) by the Company other than for Cause, or (y) by the Executive for good reason as defined in art. 340c para 2 CO, in either case, during the two (2)-year period commencing upon a Change in Control.   Subject to the Executive's not engaging in a Material Covenant Violation or a Material Cooperation Violation, upon a termination described in the preceding sentence, the Executive shall receive thebenefits set forth in Section 7(c) hereof, except that (i) the Severance Amount shall be two (2.0) multiplied by the annual sum of the Executive’s Base Salary and Target Bonus in effect for the then-current year of termination, and (ii)  in lieu of receiving the Severance Amount in installments as contemplated under Section 7(c)(ii) hereof, the Executive shall receive a lump sum payment equal to the Severance Amount on the date of such termination.

By way of this letter amendment, we propose deleting current Section 7(d)(i) and replacing it with new Section 7(d)(i). There are no other changes to your employment contract.  All other terms and conditions remain unchanged.

Please return your acceptance at your earliest convenience.

Best regards,

Signature:  /s/ Frank A. Bozich	Signature:  /s/ Paula Cooney
Name:Frank A. Bozich	Name:Paula Cooney
Title:President & Chief Executive Officer	Title:S.V.P., Chief Human Resources Officer
Date:5-20-2022	Date:5-20-2022

<REMAINDER OF PAGE INTENTIALLY BLANK – SIGNATURE PAGE TO FOLLOW>

Trinseo PLC 76 Sir John Rogerson’s Quay Dublin 2 D02 FX51, Ireland

I have read this letter amendment, understand it, and agree to the terms set forth above:

Date: 6/01/2022Signature: /s/ Francesca Reverberi

Francesca Reverberi

Page 2 of 2

EX-31.1

Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

I, Frank Bozich, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Trinseo PLC;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal controls over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 9, 2022

By:	/s/ Frank Bozich
Name:	Frank Bozich
Title:	Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, David Stasse, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Trinseo PLC;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal controls over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 9, 2022

J.
	By:	/s/ David Stasse
	Name:	David Stasse
	Title:	Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification of CEO Pursuant to 18 U.S.C. Section 1350,

As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the quarterly report of Trinseo PLC (the “Company”) on Form 10-Q for the period ended June 30, 2022 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, the undersigned, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

(1) The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 9, 2022

By:	/s/ Frank Bozich
Name:	Frank Bozich
Title:	Chief Executive Officer

EX-32.2

Exhibit 32.2

Certification of CFO Pursuant to 18 U.S.C. Section 1350,

As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the quarterly report of Trinseo PLC (the “Company”) on Form 10-Q for the period ended June 30, 2022 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, the undersigned, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

(1) The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 9, 2022

J.
	By:	/s/ David Stasse
	Name:	David Stasse
	Title:	Chief Financial Officer

XML

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2022	Aug. 05, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
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	1000 Chesterbrook Boulevard
Entity Address, Address Line Two	Suite 300
Entity Address, Address Line Three	Berwyn
Entity Address, City or Town	Berwyn, PA 19312
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19312
City Area Code	610
Local Phone Number	240-3200
Title of 12(b) Security	Ordinary Shares, par value $0.01 per share
Trading Symbol	TSE
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		34,972,646
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001519061
Current Fiscal Year End Date	--12-31
Amendment Flag	false

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 264.4	$ 573.0
Accounts receivable, net of allowance for doubtful accounts (June 30, 2022: $6.0; December 31, 2021: $4.1)	849.5	740.2
Inventories	759.7	621.0
Other current assets	36.2	44.3
Total current assets	1,909.8	1,978.5
Investments in unconsolidated affiliates	271.4	247.8
Property, plant and equipment, net of accumulated depreciation (June 30, 2022: $580.3; December 31, 2021: $556.5)	665.3	719.0
Other assets
Goodwill	709.4	710.1
Other intangible assets, net	785.3	823.8
Right-of-use assets - operating, net	82.5	85.3
Deferred income tax assets	56.9	77.6
Deferred charges and other assets	57.5	70.1
Total other assets	1,691.6	1,766.9
Total assets	4,538.1	4,712.2
Current liabilities
Short-term borrowings and current portion of long-term debt	17.7	18.5
Accounts payable	561.7	590.3
Current lease liabilities - operating	18.6	18.4
Income taxes payable	32.3	52.1
Accrued expenses and other current liabilities	229.0	235.1
Total current liabilities	859.3	914.4
Noncurrent liabilities
Long-term debt, net of unamortized deferred financing fees	2,302.3	2,305.6
Noncurrent lease liabilities - operating	66.1	69.2
Deferred income tax liabilities	101.8	103.2
Other noncurrent obligations	284.0	306.7
Total noncurrent liabilities	2,754.2	2,784.7
Commitments and contingencies (Note 13)
Shareholders' equity
Ordinary shares, $0.01 nominal value, 4,000.0 shares authorized (June 30, 2022: 39.2 shares issued and 36.3 shares outstanding; December 31, 2021: 38.9 shares issued and 37.9 shares outstanding)	0.4	0.4
Additional paid-in-capital	480.1	468.1
Treasury shares, at cost (June 30, 2022: 2.9 shares; December 31, 2021: 1.0 shares)	(150.0)	(50.0)
Retained earnings	772.0	741.8
Accumulated other comprehensive loss	(177.9)	(147.2)
Total shareholders' equity	924.6	1,013.1
Total liabilities and shareholders' equity	$ 4,538.1	$ 4,712.2

XML

Condensed Consolidated Balance Sheets (Parenthetical) shares in Thousands, $ in Millions	Jun. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2022 € / shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2021 € / shares
Allowance for doubtful accounts | $	$ 6.0		$ 4.1
Accumulated depreciation | $	$ 580.3		$ 556.5
Ordinary shares, nominal value | $ / shares	$ 0.01		$ 0.01
Ordinary shares, shares authorized	4,000,000		4,000,000
Ordinary shares, shares issued	39,200		38,900
Ordinary shares, shares outstanding	36,300		37,900
Treasury stock, shares	2,900		1,000
Preferred stock, par value | € / shares		€ 0.01		€ 0.01
Preferred stock, shares authorized	1,000,000		1,000,000
Preferred stock, shares issued	0		0
Preferred stock, shares outstanding	0		0
Deferred Ordinary Shares
Ordinary shares, nominal value | € / shares		€ 1.00		€ 1.00
Ordinary shares, shares authorized	25		25
Ordinary shares, shares issued	25		25
Ordinary shares, shares outstanding	25		25

XML

Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Condensed Consolidated Statements of Operations
Net sales	$ 1,425.5	$ 1,273.7	$ 2,812.2	$ 2,259.7
Cost of sales	1,286.4	1,053.7	2,497.1	1,850.8
Gross profit	139.1	220.0	315.1	408.9
Selling, general and administrative expenses	85.6	97.3	182.3	153.8
Equity in earnings of unconsolidated affiliates	39.4	30.1	61.0	53.0
Other charges	1.3	1.8	37.6	1.8
Operating income	91.6	151.0	156.2	306.3
Interest expense, net	25.4	21.6	47.3	33.6
Acquisition purchase price hedge (gain) loss		(33.0)		22.0
Other expense (income), net	(1.7)	6.1	1.3	8.5
Income from continuing operations before income taxes	67.9	156.3	107.6	242.2
Provision for income taxes	30.8	23.3	53.4	43.4
Net income from continuing operations	37.1	133.0	54.2	198.8
Net income from discontinued operations, net of income taxes	0.3	18.6		24.3
Net income	$ 37.4	$ 151.6	$ 54.2	$ 223.1
Earnings Per Share
Weighted average shares- basic	36.3	38.8	36.8	38.6
Net income per share- basic: continuing operations	$ 1.02	$ 3.43	$ 1.47	$ 5.15
Net income per share- basic: discontinued operations	0.01	0.48		0.62
Net income per share- basic	$ 1.03	$ 3.91	$ 1.47	$ 5.77
Weighted average shares- diluted	37.0	39.6	37.6	39.6
Net income per share- diluted: continuing operations	$ 1.00	$ 3.35	$ 1.44	$ 5.02
Net income per share- diluted: discontinued operations	0.01	0.47		0.61
Net income per share- diluted	$ 1.01	$ 3.82	$ 1.44	$ 5.63

XML

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Condensed Consolidated Statements of Comprehensive Income (Loss)
Net income	$ 37.4	$ 151.6	$ 54.2	$ 223.1
Other comprehensive income (loss), net of tax:
Cumulative translation adjustments (net of tax of $3.9, $0.0, $3.9, $0.0)	(34.8)	(0.7)	(39.1)	(0.3)
Net gain (loss) on cash flow hedges (net of tax of $0.6, $0.0, $0.6, $0.0)	0.3	(0.2)	1.8	4.4
Pension and other postretirement benefit plans:
Net gain arising during period (net of tax of $0.9, $0.0, $0.9, $0.0)	7.7		7.7
Amounts reclassified from accumulated other comprehensive income	(1.4)	1.0	(1.1)	2.1
Total other comprehensive income (loss), net of tax	(28.2)	0.1	(30.7)	6.2
Comprehensive income	$ 9.2	$ 151.7	$ 23.5	$ 229.3

XML

Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Condensed Consolidated Statements of Comprehensive Income (Loss)
Cumulative translation adjustments, tax	$ 3.9	$ 0.0	$ 3.9	$ 0.0
Net gain (loss) on cash flow hedges, tax	0.6	0.0	0.6	0.0
Net gain (loss) during period, tax expense	$ 0.9	$ 0.0	$ 0.9	$ 0.0

XML

Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Ordinary Shares	Additional Paid-In Capital	Treasury Shares	Total	Retained Earnings	Total
Balance at beginning of period at Dec. 31, 2020	$ 0.5	$ 579.6	$ (542.9)	$ (186.1)	$ 739.2	$ 590.3
Balance at beginning of period, shares at Dec. 31, 2020	38.4		10.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income					71.5	71.5
Other comprehensive income				6.1		6.1
Share-based compensation activity		(1.1)	$ 12.9			11.8
Share-based compensation activity, shares	0.3		(0.3)
Dividends on ordinary shares					(3.4)	(3.4)
Balance at end of period at Mar. 31, 2021	$ 0.5	578.5	$ (530.0)	(180.0)	807.3	676.3
Balance at end of period, shares at Mar. 31, 2021	38.7		10.1
Balance at beginning of period at Dec. 31, 2020	$ 0.5	579.6	$ (542.9)	(186.1)	739.2	590.3
Balance at beginning of period, shares at Dec. 31, 2020	38.4		10.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income						223.1
Other comprehensive income						6.2
Balance at end of period at Jun. 30, 2021	$ 0.5	578.7	$ (525.3)	(179.9)	955.8	829.8
Balance at end of period, shares at Jun. 30, 2021	38.8		10.0
Balance at beginning of period at Mar. 31, 2021	$ 0.5	578.5	$ (530.0)	(180.0)	807.3	676.3
Balance at beginning of period, shares at Mar. 31, 2021	38.7		10.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income					151.6	151.6
Other comprehensive income				0.1		0.1
Share-based compensation activity		0.2	$ 4.7			4.9
Share-based compensation activity, shares	0.1		(0.1)
Dividends on ordinary shares					(3.1)	(3.1)
Balance at end of period at Jun. 30, 2021	$ 0.5	578.7	$ (525.3)	(179.9)	955.8	829.8
Balance at end of period, shares at Jun. 30, 2021	38.8		10.0
Balance at beginning of period at Dec. 31, 2021	$ 0.4	468.1	$ (50.0)	(147.2)	741.8	$ 1,013.1
Balance at beginning of period, shares at Dec. 31, 2021	37.9		1.0			37.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income					16.7	$ 16.7
Other comprehensive income				(2.5)		(2.5)
Share-based compensation activity		7.6				7.6
Share-based compensation activity, shares	0.2
Purchase of treasury shares			$ (50.0)			(50.0)
Purchase of treasury shares, shares	(0.9)		0.9
Dividends on ordinary shares					(12.1)	(12.1)
Balance at end of period at Mar. 31, 2022	$ 0.4	475.7	$ (100.0)	(149.7)	746.4	972.8
Balance at end of period, shares at Mar. 31, 2022	37.2		1.9
Balance at beginning of period at Dec. 31, 2021	$ 0.4	468.1	$ (50.0)	(147.2)	741.8	$ 1,013.1
Balance at beginning of period, shares at Dec. 31, 2021	37.9		1.0			37.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income						$ 54.2
Other comprehensive income						(30.7)
Balance at end of period at Jun. 30, 2022	$ 0.4	480.1	$ (150.0)	(177.9)	772.0	$ 924.6
Balance at end of period, shares at Jun. 30, 2022	36.3		2.9			36.3
Balance at beginning of period at Mar. 31, 2022	$ 0.4	475.7	$ (100.0)	(149.7)	746.4	$ 972.8
Balance at beginning of period, shares at Mar. 31, 2022	37.2		1.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income					37.4	37.4
Other comprehensive income				(28.2)		(28.2)
Share-based compensation activity		4.4				4.4
Share-based compensation activity, shares	0.1
Purchase of treasury shares			$ (50.0)			(50.0)
Purchase of treasury shares, shares	(1.0)		1.0
Dividends on ordinary shares					(11.8)	(11.8)
Balance at end of period at Jun. 30, 2022	$ 0.4	$ 480.1	$ (150.0)	$ (177.9)	$ 772.0	$ 924.6
Balance at end of period, shares at Jun. 30, 2022	36.3		2.9			36.3

XML

Condensed Consolidated Statements of Shareholders' Equity (Parenthetical)) - $ / shares	3 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021
Condensed Consolidated Statement of Stockholders' Equity
Dividends on ordinary shares	$ 0.32	$ 0.32	$ 0.08	$ 0.08

XML

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities
Net income	$ 54.2	$ 223.1
Less: Net income from discontinued operations		24.3
Net income from continuing operations	54.2	198.8
Adjustments to reconcile net income from continuing operations to net cash provided by operating activities - continuing operations
Depreciation and amortization	101.1	61.2
Amortization of deferred financing fees, issuance discount, and excluded component of hedging instruments	4.6	3.2
Deferred income tax	9.8	3.6
Share-based compensation expense	12.2	7.0
Earnings of unconsolidated affiliates, net of dividends	(23.5)	(13.1)
Unrealized net gain on foreign exchange forward contracts	(4.5)	(31.5)
Acquisition purchase price hedge loss		22.0
Pension curtailment and settlement gain	(1.7)
Gain on sale of businesses and other assets	(1.8)	(0.2)
Asset impairment charges or write-offs	2.0	1.8
Changes in assets and liabilities
Accounts receivable	(135.1)	(296.2)
Inventories	(166.7)	(167.6)
Accounts payable and other current liabilities	15.8	199.7
Income taxes payable	(17.4)	16.2
Other assets, net	20.9	(8.9)
Other liabilities, net	41.2	22.1
Cash provided by (used in) operating activities - continuing operations	(88.9)	18.1
Cash provided by operating activities - discontinued operations	0.8	11.9
Cash provided by (used in) operating activities	(88.1)	30.0
Cash flows from investing activities
Capital expenditures	(55.4)	(30.0)
Cash paid for asset or business acquisitions, net of cash acquired ($1.0 and $10.4)	(22.2)	(1,358.6)
Proceeds from the sale of businesses and other assets	5.3	0.2
Proceeds from (payments for) the settlement of hedging instruments	1.9	(14.7)
Cash used in investing activities - continuing operations	(70.4)	(1,403.1)
Cash used in investing activities - discontinued operations	(0.8)	(2.4)
Cash used in investing activities	(71.2)	(1,405.5)
Cash flows from financing activities
Deferred financing fees		(35.0)
Short-term borrowings, net	(7.5)	(6.2)
Purchase of treasury shares	(101.9)
Dividends paid	(24.6)	(6.4)
Proceeds from exercise of option awards	2.9	10.5
Withholding taxes paid on restricted share units	(2.5)	(0.8)
Repayments of 2024 Term Loan B and 2028 Term Loan B	(7.2)	(3.5)
Net proceeds from issuance of 2028 Term Loan B		746.3
Net proceeds from issuance of 2029 Senior Notes		450.0
Cash provided by (used in) financing activities	(140.8)	1,154.9
Effect of exchange rates on cash	(8.5)	(1.1)
Net change in cash, cash equivalents, and restricted cash	(308.6)	(221.7)
Cash, cash equivalents, and restricted cash-beginning of period	573.0	588.7
Cash, cash equivalents, and restricted cash-end of period	$ 264.4	367.0
Restricted Cash and Cash Equivalents, Current, Asset, Statement of Financial Position [Extensible List]	Other Assets, Current
Cash and cash equivalents-end of period	$ 264.4	367.0
Supplemental disclosure of cash flow information
Net cash paid	$ 1.0	$ 10.4

XML

Basis of Presentation

6 Months Ended

Jun. 30, 2022

Basis of Presentation

Basis of Presentation

NOTE 1—BASIS OF PRESENTATION

The unaudited interim condensed consolidated financial statements of Trinseo PLC and its subsidiaries (the “Company”) as of and for the periods ended June 30, 2022 and 2021 were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and reflect all adjustments, consisting only of normal recurring adjustments, which, in the opinion of management, are considered necessary for the fair statement of the results for the periods presented. Because they cover interim periods, the statements and related notes to the financial statements do not include all disclosures normally provided in annual financial statements, and therefore, these statements should be read in conjunction with the 2021 audited consolidated financial statements included within the Company’s Annual Report on Form 10-K (“Annual Report”) filed with the Securities and Exchange Commission (“SEC”) on February 23, 2022. The Company’s condensed consolidated financial statements presented herein reflect the latest estimates and assumptions made by management that affect the reported amounts and related disclosures as of and for the period ended June 30, 2022. However, actual results could differ from these estimates and assumptions.

The December 31, 2021 condensed consolidated balance sheet data presented herein was derived from the Company’s December 31, 2021 audited consolidated financial statements, but does not include all disclosures required by GAAP for annual periods.

Certain prior year amounts have been reclassified to conform to the current year presentation. Throughout this Quarterly Report, unless otherwise indicated, amounts and activity are presented on a continuing operations basis.

XML

Recent Accounting Guidance

6 Months Ended

Jun. 30, 2022

Recent Accounting Guidance

Recent Accounting Guidance

NOTE 2—RECENT ACCOUNTING GUIDANCE

As of June 30, 2022, there was no recently issued accounting standards which would have a material effect on the Company’s condensed consolidated financial statements.

XML

Acquisitions

6 Months Ended

Jun. 30, 2022

Acquisitions

Acquisitions

NOTE 3—ACQUISITIONS

Acquisition of Heathland B.V.

On January 3, 2022, the Company completed the acquisition of Heathland B.V. (“Heathland”) from Heathland Holding B.V. (“Heathland Holding”), through the purchase of all issued and outstanding shares (the “Heathland Acquisition”). The Heathland Acquisition was completed pursuant to the Sale and Purchase Agreement dated December 3, 2021 (“Heathland Agreement”), by and between the Company and Heathland Holding. Heathland is a leading collector and recycler of post-consumer and post-industrial plastic wastes in Europe. The total purchase price consideration is estimated to be $29.3 million, including an initial cash purchase price of $22.9 million, as well as $6.4 million of contingent cash consideration, representing the fair value of certain earn-out payments. The maximum amount of potential earn-out payments is $6.8 million, which amounts will become payable to Heathland Holding as and when the related performance milestones or thresholds are achieved over the three-year period following the date of acquisition. The Heathland Acquisition was funded through existing cash on hand.

Additionally, the Heathland Agreement includes a service fee of approximately $4.5 million, payable to Heathland Holdings contingent upon the continued employment of certain Heathland employees for three years following the acquisition date. The Company has not included this service fee as part of the estimated purchase price and instead will accrue for the service fee as compensation expense over the three-year period in which it is earned.

The Company accounted for the acquisition as a business combination pursuant to ASC 805. In accordance with ASC 805, fair values are assigned to tangible and identifiable intangible assets acquired and liabilities assumed at the acquisition date based on the information that was available as of the acquisition date.

The Company allocated the purchase price of the acquisition to identifiable assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. The excess of the purchase price over the aggregate fair values was recorded as goodwill. During the second quarter of 2022, there were no material changes to the purchase price allocation for the Heathland acquisition.

The table below summarizes the purchase price allocation for the assets acquired and liabilities assumed, based on their relative fair values, which have been assessed as of the January 3, 2022 acquisition date:

	January 3,
	2022
Cash and cash equivalents	$	1.0
Other current assets		1.2
Other intangible assets (1)
Customer relationships		5.1
Tradenames		0.9
Developed technology		0.2
Other assets		1.0
Total fair value of assets acquired		9.4
Current liabilities		(1.3)
Noncurrent liabilities		(1.6)
Total fair value of liabilities assumed		(2.9)
Net identifiable assets acquired		6.5
Purchase price consideration		29.3
Goodwill (2)	$	22.8

(1) The expected weighted average useful life of the acquired intangible assets are 7 years for customer relationships, tradenames and developed technology.

(2) Goodwill largely consists of strategic and synergistic opportunities resulting from combining Heathland with the Company’s existing businesses and is allocated entirely to the Base Plastics segment. No goodwill related to this acquisition is expected to be deductible for income tax purposes.

Pro forma results of operations information have not been presented as the effect of the acquisition is not material. The operating results of the Heathland acquisition are included within the Company's condensed consolidated statements of operations since the acquisition date of January 3, 2022 and were not material for the three and six months ended June 30, 2022. Pursuant to GAAP, costs incurred to complete the Heathland Acquisition as well as costs incurred to integrate into the Company’s operations are expensed as incurred. Transaction-related costs incurred, which are included within “Selling, general, and administrative expenses” in the condensed consolidated statements of operations, were not material for the three and six months ended June 30, 2022.

Acquisition of Aristech Surfaces

On September 1, 2021, the Company completed its previously announced acquisition of Aristech Surfaces LLC (“Aristech Surfaces”) from SK AA Holdings LLC (“SK AA Holdings”), the sole member of Aristech Surfaces, through purchase of 100% membership interest and intellectual property (the “Aristech Surfaces Acquisition”). The purchase

price consideration for the Aristech Surfaces Acquisition was $449.5 million, all of which was paid during the year ended December 31, 2021 (noting no cash flows during the six months ended June 30, 2021). Aristech Surfaces is a leading North America manufacturer and global provider of PMMA continuous cast and solid surface sheets, serving the wellness, architectural, transportation and industrial markets, whose results are included within the Engineered Materials segment. Aristech Surfaces’ products are used for a variety of applications, including the construction of hot tubs, swim spas, counter tops, signage, bath products and recreational vehicles.

The Company allocated the purchase price of the acquisition to identifiable assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. Refer to the Annual Report for further information. During the second quarter of 2022, there were no changes to the purchase price allocation for the acquisition of the Aristech Surfaces business. However, further adjustments may be necessary as a result of the Company’s on-going assessment of additional information that existed as of the acquisition date related to the fair value of assets acquired and liabilities assumed, including goodwill, during the measurement period.

Acquisition of the PMMA Business

On May 3, 2021, the Company completed its previously-announced acquisition of the polymethyl methacrylates (“PMMA”) and activated methyl methacrylates (“MMA”) business (together, the “PMMA business”) from Arkema S.A., (“Arkema”) through the purchase of 100% of the shares of certain subsidiaries of Arkema (the “PMMA Acquisition”). The purchase price consideration for the PMMA Acquisition was $1,364.9 million, all of which was paid during the year ended December 31, 2021 (of which $1,358.6 million was paid during the six months ended June 30, 2021). PMMA is a transparent and rigid plastic with a wide range of end uses, and is an attractive adjacent chemistry which complements Trinseo’s existing offerings across several end markets including automotive, building & construction, medical and consumer electronics. PMMA results are included within the Engineered Materials segment.

The Company allocated the purchase price of the acquisition to identifiable assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. Refer to the Annual Report for further information. During the six months ended June 30, 2022, there were no changes to the purchase price allocation for the acquisition of the PMMA business. As of June 30, 2022, the acquisition measurement period for the PMMA business has ended and the values assigned to the assets acquired and liabilities assumed are final.

Unaudited Pro Forma Financial Information

The following unaudited pro forma financial information presents the consolidated results of operations of the Company with the PMMA business and Aristech Surfaces for the three and six months ended June 30, 2021 as if these acquisitions had occurred on January l, 2021. The pro forma results were calculated by combining the results of Trinseo with the PMMA business and Aristech Surfaces but do not include adjustments related to cost savings or other synergies that are anticipated as a result of these acquisitions. Accordingly, these unaudited pro forma results are presented for informational purposes only and are not necessarily indicative of what the actual results of operations would have been if the acquisitions had occurred as of January 1, 2021, nor are they indicative of future results of operations.

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2021		2021
Net sales	$	1,369.4	$	2,563.6
Net income	$	185.5	$	261.1
Income from continuing operations	$	166.9	$	236.8

XML

Divestitures And Discontinued Operations

6 Months Ended

Jun. 30, 2022

Divestitures and Discontinued Operations

Divestitures and Discontinued Operations

NOTE 4—DIVESTITURES AND DISCONTINUED OPERATIONS

On December 1, 2021, the Company completed the divestiture of its Synthetic Rubber business to Synthos S.A. and certain of its subsidiaries (together, “Synthos”) for a purchase price of $402.4 million, which reflected a reduction of approximately $41.6 million for the assumption of pension liabilities by Synthos and $47.0 million for net working capital (excluding inventory) retained by Trinseo. Refer to the Annual Report for further information. At closing, the

Company and Synthos executed a long-term supply agreement, in which Trinseo will supply Synthos certain raw materials used in the Synthetic Rubber business subsequent to the sale. For the three and six months ended June 30, 2022, the Company recorded $22.7 million and $41.8 million, respectively, in net sales, and $15.6 million and $31.8 million, respectively, in cost of sales related to the supply agreement, which is recorded in continuing operations.

The following table summarizes the results of the Synthetic Rubber business for the three and six months ended June 30, 2022 and 2021, which are reflected as discontinued operations in the Company’s condensed consolidated statements of operations:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Net sales	$	—	$	135.7	$	0.1	$	259.9
Cost of sales		0.8		108.2		1.4		219.3
Gross profit (loss)		(0.8)		27.5		(1.3)		40.6
Selling, general and administrative expenses		(0.1)		5.6		(0.3)		11.8
Operating income (loss)		(0.7)		21.9		(1.0)		28.8
Gain on sale of businesses and other assets		1.2		—		1.2		—
Other expense, net		—		0.8		—		1.0
Income from discontinued operations before income taxes		0.5		21.1		0.2		27.8
Provision for income taxes		0.2		2.5		0.2		3.5
Net income from discontinued operations	$	0.3	$	18.6	$	—	$	24.3

XML

Net Sales

6 Months Ended

Jun. 30, 2022

Net Sales

Net Sales

NOTE 5—NET SALES

Refer to the Annual Report for information on the Company's accounting policies and further background related to its net sales.

The following table provides disclosure of net sales to external customers by primary geographical market (based on the location where sales originated), by segment for the three and six months ended June 30, 2022 and 2021.

	Engineered		Latex		Base
Three Months Ended	Materials		Binders		Plastics		Polystyrene		Feedstocks		Total
June 30, 2022
United States	$	150.7	$	102.5	$	106.1	$	—	$	4.6	$	363.9
Europe		108.9		169.4		198.5		215.9		92.0		784.7
Asia-Pacific		38.2		79.3		31.6		96.0		—		245.1
Rest of World		3.5		2.5		25.7		0.1		—		31.8
Total	$	301.3	$	353.7	$	361.9	$	312.0	$	96.6	$	1,425.5
June 30, 2021
United States	$	60.9	$	74.1	$	71.6	$	—	$	3.3	$	209.9
Europe		80.3		160.5		253.8		199.8		68.0		762.4
Asia-Pacific		37.8		74.3		51.9		113.5		—		277.5
Rest of World		2.0		2.3		19.6		—		—		23.9
Total	$	181.0	$	311.2	$	396.9	$	313.3	$	71.3	$	1,273.7

	Engineered		Latex		Base
Six Months Ended	Materials		Binders		Plastics		Polystyrene		Feedstocks		Total
June 30, 2022
United States	$	289.1	$	184.7	$	190.6	$	—	$	8.5	$	672.9
Europe		227.6		320.3		445.1		430.5		158.4		1,581.9
Asia-Pacific		73.5		151.0		68.8		199.4		—		492.7
Rest of World		6.3		4.4		53.9		0.1		—		64.7
Total	$	596.5	$	660.4	$	758.4	$	630.0	$	166.9	$	2,812.2
June 30, 2021
United States	$	71.1	$	141.9	$	134.2	$	—	$	6.7	$	353.9
Europe		101.4		278.1		451.7		349.0		138.1		1,318.3
Asia-Pacific		72.1		138.1		100.6		231.1		—		541.9
Rest of World		2.2		4.1		39.3		—		—		45.6
Total	$	246.8	$	562.2	$	725.8	$	580.1	$	144.8	$	2,259.7

XML

Investments in Unconsolidated Affiliates

6 Months Ended

Jun. 30, 2022

Investments in Unconsolidated Affiliates

Investments in Unconsolidated Affiliates

NOTE 6—INVESTMENTS IN UNCONSOLIDATED AFFILIATES

The Company is currently supplemented by one joint venture, Americas Styrenics LLC (“Americas Styrenics,” a styrene and polystyrene joint venture with Chevron Phillips Chemical Company LP), which is accounted for using the equity method. The results of Americas Styrenics are included within its own reporting segment.

Americas Styrenics is a privately held company; therefore, a quoted market price for its equity interests is not available. The summarized financial information of the Company’s unconsolidated affiliate is shown below.

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Sales	$	594.6	$	495.6	$	1,119.0	$	918.5
Gross profit	$	93.5	$	74.5	$	141.6	$	139.9
Net income	$	80.1	$	63.6	$	116.2	$	114.6

As of June 30, 2022 and December 31, 2021, the Company’s investment in Americas Styrenics was $271.4 million and $247.8 million, respectively, which was $12.3 million and $9.4 million greater than the Company’s 50% share of the underlying net assets of Americas Styrenics, respectively. This amount represents the difference between the book value of assets held by the joint venture and the Company’s 50% share of the total recorded value of the joint venture’s assets, inclusive of certain adjustments to conform with the Company’s accounting policies. This difference is being amortized over a weighted average remaining useful life of approximately 2.5 years as of June 30, 2022. The Company received dividends of $30.0 million and $37.5 million from Americas Styrenics during the three and six months ended June 30, 2022, respectively, and $25.0 million and $40.0 million during the three and six months ended June 30, 2021, respectively.

XML

Inventories

6 Months Ended

Jun. 30, 2022

Inventories

Inventories

NOTE 7—INVENTORIES

Inventories consisted of the following:

	June 30,		December 31,
	2022		2021
Finished goods	$	352.9	$	279.2
Raw materials and semi-finished goods		370.1		303.9
Supplies		36.7		37.9
Total	$	759.7	$	621.0

XML

Debt

6 Months Ended

Jun. 30, 2022

Debt

Debt

NOTE 8—DEBT

Refer to the Annual Report for definitions of capitalized terms not included herein and further background on the Company’s debt structure discussed below. The Company was in compliance with all debt related covenants as of June 30, 2022 and December 31, 2021.

As of June 30, 2022 and December 31, 2021, debt consisted of the following:

			June 30, 2022						December 31, 2021
	Interest Rate as of June 30, 2022	Maturity Date	Carrying Amount		Unamortized Deferred Financing Fees (1)		Total Debt, Less Unamortized Deferred Financing Fees		Carrying Amount		Unamortized Deferred Financing Fees (1)		Total Debt, Less Unamortized Deferred Financing Fees
Senior Credit Facility
2024 Term Loan B	3.666%	September 2024	$	666.9	$	(6.6)	$	660.3	$	670.4	$	(8.0)	$	662.4
2028 Term Loan B	4.166%	May 2028		739.3		(15.7)		723.6		742.8		(17.0)		725.8
2026 Revolving Facility(2)	Various	May 2026		—		—		—		—		—		—
2029 Senior Notes	5.125%	April 2029		450.0		(13.8)		436.2		450.0		(14.7)		435.3
2025 Senior Notes	5.375%	September 2025		500.0		(4.4)		495.6		500.0		(5.0)		495.0
Accounts Receivable Securitization Facility(3)	Various	November 2024		—		—		—		—		—		—
Other indebtedness	Various	Various		4.3		—		4.3		5.6		—		5.6
Total debt			$	2,360.5	$	(40.5)	$	2,320.0	$	2,368.8	$	(44.7)	$	2,324.1
Less: current portion(4)								(17.7)						(18.5)
Total long-term debt, net of unamortized deferred financing fees							$	2,302.3					$	2,305.6

(1) This caption does not include deferred financing fees related to the Company’s revolving facilities, which are included within “Deferred charges and other assets” on the condensed consolidated balance sheets.

(2) As of June 30, 2022, under the 2026 Revolving Facility, the Company had a capacity of $375.0 million and funds available for borrowing of $368.9 million (net of $6.1 million outstanding letters of credit). Additionally, the Company is required to pay a quarterly commitment fee in respect of any unused commitments under this facility equal to 0.375% per annum.

(3) As of June 30, 2022, this facility had a borrowing capacity of $150.0 million, and the Company had approximately $150.0 million of accounts receivable available to support this facility, based on the pool of eligible accounts receivable.

(4) The current portion of long-term debt was primarily related to $14.5 million of the scheduled future principal payments on both the 2024 Term Loan B and 2028 Term Loan B as of June 30, 2022 and December 31, 2021.

XML

Goodwill

6 Months Ended

Jun. 30, 2022

Goodwill.

Goodwill

NOTE 9—GOODWILL

The following table shows changes in the carrying amount of goodwill, by segment, from December 31, 2021 to June 30, 2022:

	Engineered		Latex		Base						Americas
	Materials		Binders		Plastics		Polystyrene		Feedstocks		Styrenics		Total
Balance at December 31, 2021	$	667.3	$	15.9	$	22.4	$	4.5	$	—	$	—	$	710.1
Acquisitions (Note 3)		—		—		22.8		—		—		—		22.8
Foreign currency impact		(17.6)		(1.6)		(3.8)		(0.5)		—		—		(23.5)
Balance at June 30, 2022	$	649.7	$	14.3	$	41.4	$	4.0	$	—	$	—	$	709.4

XML

Derivative Instruments

6 Months Ended

Jun. 30, 2022

Derivative Instruments

Derivative Instruments

NOTE 10—DERIVATIVE INSTRUMENTS

The Company’s ongoing business operations expose it to various risks, including fluctuating foreign exchange rates and interest rate risk. To manage these risks, the Company periodically enters into derivative financial instruments, such as foreign exchange forward contracts and interest rate swap agreements. The Company does not hold or enter into financial instruments for trading or speculative purposes. All derivatives are recorded on the condensed consolidated balance sheets at fair value.

Foreign Exchange Forward Contracts

Certain subsidiaries have assets and liabilities denominated in currencies other than their respective functional currencies, which creates foreign exchange risk. The Company’s principal strategy in managing its exposure to changes in foreign currency exchange rates is to naturally hedge the foreign currency-denominated liabilities on its balance sheet against corresponding assets of the same currency, such that any changes in liabilities due to fluctuations in exchange rates are offset by changes in their corresponding foreign currency assets. In order to further reduce this exposure, the Company also uses foreign exchange forward contracts to economically hedge the impact of the variability in exchange rates on assets and liabilities denominated in certain foreign currencies. The Company entered into a specific such foreign exchange forward contract in December 2020 in order to economically hedge the euro-denominated purchase price of the Arkema PMMA business, which was acquired on May 3, 2021, as discussed in Note 3. These derivative contracts are not designated for hedge accounting treatment.

As of June 30, 2022, the Company had open foreign exchange forward contracts with a notional U.S. dollar equivalent absolute value of $689.6 million. The following table displays the notional amounts of the most significant net foreign exchange hedge positions outstanding as of June 30, 2022:

	June 30,
Buy / (Sell)	2022
Euro	$	(564.7)
Chinese Yuan	$	(48.7)
New Taiwan Dollar	$	16.4
Swedish Krona	$	12.6
South Korean Won	$	(12.4)

Open foreign exchange forward contracts as of June 30, 2022 had maturities occurring over a period of two months.

Foreign Exchange Cash Flow Hedges

The Company also enters into forward contracts, as deemed appropriate, with the objective of managing the currency risk associated with forecasted U.S. dollar-denominated raw materials purchases by one of its subsidiaries whose functional currency is the euro. By entering into these forward contracts, which are designated as cash flow hedges, the Company buys a designated amount of U.S. dollars and sells euros at the prevailing market rate to mitigate the risk associated with the fluctuations in the euro-to-U.S. dollar foreign currency exchange rates. The qualifying hedge contracts are marked-to-market at each reporting date and any unrealized gains or losses are included in Accumulated Other Comprehensive Income (“AOCI”) to the extent effective, and reclassified to cost of sales in the period during which the transaction affects earnings or it becomes probable that the forecasted transaction will not occur.

The Company had no open foreign exchange cash flow hedges as of June 30, 2022.

Interest Rate Swaps

On September 6, 2017, the Company issued the 2024 Term Loan B, which currently bears an interest rate of LIBOR plus 2.00%, subject to a 0.00% LIBOR floor. In order to reduce the variability in interest payments associated with the Company’s variable rate debt, during 2017 the Company entered into certain interest rate swap agreements to convert a portion of these variable rate borrowings into a fixed rate obligation. These interest rate swap agreements are designated as cash flow hedges, and as such, the contracts are marked-to-market at each reporting date and any

unrealized gains or losses are included in AOCI to the extent effective, and reclassified to interest expense in the period during which the transaction affects earnings or it becomes probable that the forecasted transaction will not occur.

As of June 30, 2022, the Company had open interest rate swap agreements with a net notional U.S. dollar equivalent of $200.0 million which had an effective date of September 29, 2017 and mature in September 2022. Under the terms of the swap agreements, the Company is required to pay the counterparties a stream of fixed interest payments at a rate of 1.81%, and in turn, receives variable interest payments based on 1-month LIBOR (1.67% as of June 30, 2022) from the counterparties.

Net Investment Hedge

The Company accounts for its cross currency swaps (“CCS”) under the spot method, meaning that changes in the fair value of the hedge included in the assessment of effectiveness (changes due to spot foreign exchange rates) are recorded within AOCI, where they remain until either the sale or substantially complete liquidation of the subsidiary subject to the hedge. Additionally, the initial value of any component excluded from the assessment of effectiveness is recognized in income using a systematic and rational method over the life of the hedging instrument and any difference between the change in the fair value of the excluded component and amounts recognized in income under that systematic and rational method is recognized in AOCI. When applicable, the Company amortizes any initial excluded component value of a CCS as a reduction of “Interest expense, net” in the condensed consolidated statements of operations using the straight-line method over the remaining term of the related CCS. Additionally, interest receipts and payments are accrued under the terms of the Company’s CCS and are recognized within “Interest expense, net” in the condensed consolidated statements of operations.

The Company entered into a CCS arrangement (the “2017 CCS”) on September 1, 2017, swapping U.S. dollar principal and interest payments of $500.0 million at an interest rate of 5.375% on its 2025 Senior Notes for euro-denominated payments of €420.0 million at a weighted average interest rate of 3.45% for approximately five years. On February 26, 2020, the Company settled its 2017 CCS and replaced it with a new CCS arrangement (the “2020 CCS”) that carried substantially the same terms as the 2017 CCS. Under the 2020 CCS, the Company notionally exchanged $500.0 million at an interest rate of 5.375% for €459.3 million at a weighted average interest rate of 3.672% for approximately 2.7 years, with a final maturity of November 3, 2022. The cash flows under the 2020 CCS are aligned with the Company’s principal and interest obligations on its 5.375% 2025 Senior Notes. Refer to the Annual Report for further information.

On April 7, 2022, the Company settled its existing 2020 CCS, which were set to mature in November 2022. Upon settlement of the 2020 CCS, the Company realized net cash proceeds of $1.9 million.

Summary of Derivative Instruments

The following table presents the effect of the Company’s derivative instruments, including those not designated for hedge accounting treatment, on the condensed consolidated statements of operations for the three and six months ended June 30, 2022 and 2021:

	Location and Amount of Gain (Loss) Recognized in Statements of Operations
	Three Months Ended						Three Months Ended
	June 30, 2022						June 30, 2021
	Cost of sales		Interest expense, net		Other (expense) income, net		Cost of sales		Interest expense, net		Acquisition purchase price hedge gain (loss)		Other (expense) income, net
Total amount of income and (expense) line items presented in the statements of operations in which the effects of derivative instruments are recorded	$	(1,286.4)	$	(25.4)	$	1.7	$	(1,053.7)	$	(21.6)	$	33.0	$	(6.1)
The effects of cash flow hedge instruments:
Foreign exchange cash flow hedges
Amount of gain (loss) reclassified from AOCI into income	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Interest rate swaps
Amount of loss reclassified from AOCI into income	$	—	$	(0.6)	$	—	$	—	$	(0.9)	$	—	$	—
The effects of net investment hedge instruments:
Cross currency swaps (CCS)
Amount of gain excluded from effectiveness testing	$	—	$	0.3	$	—	$	—	$	1.7	$	—	$	—
The effects of derivatives not designated as hedge instruments:
Foreign exchange forward contracts
Amount of gain recognized in income (1)	$	—	$	—	$	39.1	$	—	$	—	$	33.0	$	0.4

	Location and Amount of Gain (Loss) Recognized in Statements of Operations
	Six Months Ended						Six Months Ended
	June 30, 2022						June 30, 2021
	Cost of sales		Interest expense, net		Other (expense) income, net		Cost of sales		Interest expense, net		Acquisition purchase price hedge gain (loss)		Other (expense) income, net
Total amount of income and (expense) line items presented in the statements of operations in which the effects of derivative instruments are recorded	$	(2,497.1)	$	(47.3)	$	(1.3)	$	(1,850.8)	$	(33.6)	$	(22.0)	$	(8.5)
The effects of cash flow hedge instruments:
Foreign exchange cash flow hedges
Amount of gain (loss) reclassified from AOCI into income	$	—	$	—	$	—	$	(0.3)	$	—	$	—	$	—
Interest rate swaps
Amount of loss reclassified from AOCI into income	$	—	$	(1.4)	$	—	$	—	$	(1.7)	$	—	$	—
The effects of net investment hedge instruments:
Cross currency swaps (CCS)
Amount of gain excluded from effectiveness testing	$	—	$	2.4	$	—	$	—	$	3.6	$	—	$	—
The effects of derivatives not designated as hedge instruments:
Foreign exchange forward contracts
Amount of gain recognized in income (1)	$	—	$	—	$	47.9	$	—	$	—	$	(22.0)	$	20.1

(1) The $33.0 million gain and $22.0 million loss incurred from the change in fair value of the forward currency hedge arrangement on the euro-denominated purchase price of the Arkema PMMA business during the three and six months ended June 30, 2021, respectively, is presented separately in the condensed consolidated statements of operations from the gains recorded on the Company’s other foreign exchange forward contracts.

The following table presents the effect of cash flow and net investment hedge accounting on AOCI for the three and six months ended June 30, 2022 and 2021:

`	Gain (Loss) Recognized in AOCI on Balance Sheet
	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Designated as Cash Flow Hedges
Foreign exchange cash flow hedges	$	—	$	(1.0)	$	—	$	2.7
Interest rate swaps		0.9		0.8		2.4		1.7
Total	$	0.9	$	(0.2)	$	2.4	$	4.4
Designated as Net Investment Hedges
Cross currency swaps (CCS)	$	9.7	$	(7.1)	$	15.8	$	19.1
Total	$	9.7	$	(7.1)	$	15.8	$	19.1

	Gain (Loss) Recognized in Other expense, net in Statement of Operations
	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Settlements and changes in the fair value of forward contracts (not designated as hedges) (1)	$	39.1	$	0.4	$	47.9	$	20.1
Remeasurement of foreign currency-denominated assets and liabilities	$	(37.8)	$	0.6	$	(48.0)	$	(19.3)
Total	$	1.3	$	1.0	$	(0.1)	$	0.8

(1) Amount does not include the gain of $33.0 million and loss of $22.0 million recorded from the change in fair value of the forward currency hedge arrangement on the euro-denominated purchase price of the Arkema PMMA business during the three and six months ended June 30, 2021, respectively.

The Company expects to reclassify in the next twelve months an approximate $0.2 million net gain from AOCI into earnings related to the Company’s outstanding interest rate swaps as of June 30, 2022.

The following tables summarize the gross and net unrealized gains and losses, as well as the balance sheet classification, of outstanding derivatives recorded in the condensed consolidated balance sheets:

	June 30, 2022
	Foreign
	Exchange		Interest
Balance Sheet	Forward		Rate
Classification	Contracts		Swaps		Total
Asset Derivatives:
Accounts receivable, net of allowance	$	18.2	$	0.2	$	18.4
Gross derivative asset position		18.2		0.2		18.4
Less: Counterparty netting		(0.7)		—		(0.7)
Net derivative asset position	$	17.5	$	0.2	$	17.7
Liability Derivatives:
Accounts payable	$	(1.3)	$	—	$	(1.3)
Gross derivative liability position		(1.3)		—		(1.3)
Less: Counterparty netting		0.6		—		0.6
Net derivative liability position	$	(0.7)	$	—	$	(0.7)
Total net derivative position	$	16.8	$	0.2	$	17.0

	December 31, 2021
	Foreign
	Exchange		Interest		Cross
Balance Sheet	Forward		Rate		Currency
Classification	Contracts		Swaps		Swaps		Total
Asset Derivatives:
Accounts receivable, net of allowance	$	2.3	$	—	$	—	$	2.3
Gross derivative asset position		2.3		—		—		2.3
Less: Counterparty netting		(0.1)		—		—		(0.1)
Net derivative asset position	$	2.2	$	—	$	—	$	2.2
Liability Derivatives:
Accounts payable	$	(1.3)	$	(2.2)	$	(17.4)	$	(20.9)
Gross derivative liability position		(1.3)		(2.2)		(17.4)		(20.9)
Less: Counterparty netting		0.1		—		—		0.1
Net derivative liability position	$	(1.2)	$	(2.2)	$	(17.4)	$	(20.8)
Total net derivative position	$	1.0	$	(2.2)	$	(17.4)	$	(18.6)

Forward contracts, interest rate swaps, and cross currency swaps are entered into with a limited number of counterparties, each of which allows for net settlement of all contracts through a single payment in a single currency in the event of a default on or termination of any one contract. As such, in accordance with the Company’s accounting policy, these derivative instruments are recorded on a net basis by counterparty within the condensed consolidated balance sheets.

Refer to Notes 11 and 18 of the condensed consolidated financial statements for further information regarding the fair value of the Company’s derivative instruments and the related changes in AOCI.

XML

Fair Value Measurements

6 Months Ended

Jun. 30, 2022

Fair Value Measurements

Fair Value Measurements

NOTE 11—FAIR VALUE MEASUREMENTS

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Assets and liabilities measured at fair value are classified using the following hierarchy, which is based upon the transparency of inputs to the valuation as of the measurement date.

Level 1—Valuation is based upon quoted prices (unadjusted) for identical assets or liabilities in active markets.

Level 2—Valuation is based upon quoted prices for similar assets and liabilities in active markets, or other inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument.

Level 3—Valuation is based upon other unobservable inputs that are significant to the fair value measurement.

The following table summarizes the basis used to measure certain assets and liabilities at fair value on a recurring basis in the condensed consolidated balance sheets as of June 30, 2022 and December 31, 2021:

	June 30, 2022
	Quoted Prices in Active Markets for Identical Items		Significant Other Observable Inputs		Significant Unobservable Inputs
Assets (Liabilities) at Fair Value	(Level 1)		(Level 2)		(Level 3)		Total
Foreign exchange forward contracts—Assets	$	—	$	17.5	$	—	$	17.5
Foreign exchange forward contracts—(Liabilities)		—		(0.7)		—		(0.7)
Interest rate swaps—Assets		—		0.2		—		0.2
Total fair value	$	—	$	17.0	$	—	$	17.0

	December 31, 2021
	Quoted Prices in Active Markets for Identical Items		Significant Other Observable Inputs		Significant Unobservable Inputs
Assets (Liabilities) at Fair Value	(Level 1)		(Level 2)		(Level 3)		Total
Foreign exchange forward contracts—Assets	$	—	$	2.2	$	—	$	2.2
Foreign exchange forward contracts—(Liabilities)		—		(1.2)		—		(1.2)
Interest rate swaps—(Liabilities)		—		(2.2)		—		(2.2)
Cross currency swaps—(Liabilities)		—		(17.4)		—		(17.4)
Total fair value	$	—	$	(18.6)	$	—	$	(18.6)

The Company uses an income approach to value its derivative instruments, utilizing discounted cash flow techniques, considering the terms of the contract and observable market information available as of the reporting date, such as interest rate yield curves and currency spot and forward rates. Significant inputs to the valuation for these derivative instruments are obtained from broker quotations or from listed or over-the-counter market data, and are classified as Level 2 in the fair value hierarchy.

Nonrecurring Fair Value Measurements

The Company measured certain financial assets at fair value on a nonrecurring basis during the year ended December 31, 2021, which were still held as of June 30, 2022. These financial assets represent the Company’s styrene monomer assets in Boehlen, Germany, which it continues to operate. These assets were measured at fair value using underlying fixed asset records in conjunction with the use of industry experience and available market data, which are classified as Level 3 significant unobservable inputs in the fair value hierarchy. During the three and six months ended June 30, 2022, the Company recorded additional impairment charges of $1.3 million and $2.0 million, respectively, related to capital expenditures at the Boehlen styrene monomer facility that it determined to be impaired, which are also included within “Other charges” on the condensed consolidated statements of operations. Refer to the Company’s Annual Report for further information. As of June 30, 2022 and December 31, 2021, the value of the Boehlen styrene monomer assets are recorded at $3.1 million and $3.4 million, respectively, within the Company’s condensed consolidated balance sheets herein.

There were no other financial assets or liabilities measured at fair value on a nonrecurring basis as of December 31, 2021.

Fair Value of Debt Instruments

The following table presents the estimated fair value of the Company’s outstanding debt not carried at fair value as of June 30, 2022 and December 31, 2021:

	As of		As of
	June 30, 2022		December 31, 2021
2029 Senior Notes	$	323.5	$	460.2
2028 Term Loan B		700.1		737.4
2025 Senior Notes		426.7		509.4
2024 Term Loan B		634.0		667.5
Total fair value	$	2,084.3	$	2,374.5

The fair value of the Company’s debt facilities above (each Level 2 securities) is determined using over-the-counter market quotes and benchmark yields received from independent vendors. Fair value amount presented reflect the Company’s carrying value of debt, net of original issuance discount.

There were no other significant financial instruments outstanding as of June 30, 2022 and December 31, 2021.

XML

Provision For Income Taxes

6 Months Ended

Jun. 30, 2022

Provision For Income Taxes

Provision For Income Taxes

NOTE 12—PROVISION FOR INCOME TAXES

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2022			2021			2022			2021
Effective income tax rate		45.4	%		14.9	%		49.7	%		17.9	%

Provision for income taxes for the three and six months ended June 30, 2022 totaled $30.8 million and $53.4 million, respectively, resulting in an effective tax rate of 45.4% and 49.7%, respectively. Provision for income taxes for the three and six months ended June 30, 2021 totaled $23.3 million and $43.4 million, respectively, resulting in an effective tax rate of 14.9% and 17.9%, respectively.

The most significant driver of the increase in the effective income tax rate for the three and six months ended June 30, 2022 compared to the prior year was the change in the Company’s forecasted jurisdictional mix of earnings, where losses expected to be generated in lower rate jurisdictions are being more than offset by income expected to be generated in higher tax jurisdictions.

Also impacting the effective tax rate for the three and six months ended June 30, 2022 was the revaluation of the Company’s net deferred tax assets in Switzerland, which were originally established as part of the Swiss cantonal tax reform measures enacted in 2019. This revaluation resulted in a one-time deferred tax expense of $15.3 million recorded in the second quarter of 2022. This expense was partially offset by the release of a valuation allowance of $8.5 million during the second quarter of 2022, as a result of improvements in actual and projected future results in one of the Company’s subsidiaries in Luxembourg.

Lastly, the effective income tax rate for the six months ended June 30, 2022 increased compared to the prior year due to a $35.6 million charge recorded in the first quarter of 2022 related to the European Commission request for information, as described within Note 13 in the condensed consolidated financial statements, for which the Company estimates no tax benefit based on currently available information.

XML

Commitments and Contingencies

6 Months Ended

Jun. 30, 2022

Commitments and Contingencies.

Commitments and Contingencies

NOTE 13—COMMITMENTS AND CONTINGENCIES

Environmental Matters

Accruals for environmental matters are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated based on current law, existing technologies and other information. Pursuant to the terms of the agreement associated with the Company’s formation, the pre-closing environmental liabilities were retained by Dow, and Dow agreed, subject to temporal, monetary, and other limitations to indemnify the Company from and against environmental liabilities incurred or relating to the predecessor periods. Other than certain

immaterial environmental liabilities assumed as part of the PMMA Acquisition and the Aristech Surfaces Acquisition, no environmental claims have been asserted or threatened against the Company. The Company is not a potentially responsible party for any material amounts at any Superfund Sites. As of June 30, 2022 and December 31, 2021, the Company had $3.8 million and $4.4 million, respectively, of accrued obligations for environmental remediation or restoration costs, which were recorded at fair value within the opening balance sheets of the PMMA business and Aristech Surfaces during 2021.

Inherent uncertainties exist in the Company’s potential environmental liabilities primarily due to unknown conditions, whether future claims may fall outside the scope of the indemnity, changing governmental regulations and legal standards regarding liability, and evolving technologies for handling site remediation and restoration. In connection with the Company’s existing indemnification, the possibility is considered remote that environmental remediation costs will have a material adverse impact on the condensed consolidated financial statements over the next 12 months.

Purchase Commitments

In the normal course of business, the Company has certain raw material purchase contracts where it is required to purchase certain minimum volumes at current market prices. These commitments range from one to five years. In certain raw material purchase contracts, the Company has the right to purchase less than the required minimums and pay a liquidated damages fee, or, in case of a permanent plant shutdown, to terminate the contracts. In such cases, these obligations would be less than the annual commitment as disclosed in the Notes to Consolidated Financial Statements included in the Annual Report.

Litigation Matters

From time to time, the Company may be subject to various legal claims and proceedings incidental to the normal conduct of business, relating to such matters as employees, product liability, antitrust/competition, past waste disposal practices and release of chemicals into the environment. While it is impossible at this time to determine with certainty the ultimate outcome of these routine claims, the Company does not believe that the ultimate resolution of these claims will have a material adverse effect on the Company’s results of operations, financial condition or cash flow. Legal costs, including those legal costs expected to be incurred in connection with a loss contingency, are expensed as incurred.

European Commission Request for Information

On June 6, 2018, Trinseo Europe GmbH, a subsidiary of the Company, received a request for information in the form of a letter from the European Commission Directorate General for Competition (the “European Commission”) related to styrene monomer commercial activity in the European Economic Area. The Company subsequently commenced an internal investigation into these commercial activities and discovered instances of inappropriate activity. On October 28, 2019, a supplemental request for information was received from the European Commission. This request was limited to historical employment, entity, and organizational structures, along with certain financial, styrene purchasing, and styrene market information, as well as certain spot styrene purchase contracts. The Company has provided all information requested and continues to fully cooperate with the European Commission.

As a result of further developments in this matter, during the first quarter of 2022, the Company recorded a charge of $35.6 million which is included within “Other charges” on the condensed consolidated statements of operations. As of June 30, 2022, the estimated liability recorded on the balance sheet related to this matter was $33.4 million, adjusted for foreign exchange rate impacts. The Company is unable to predict the ultimate outcome of this matter, which remains ongoing. Based on its findings, the European Commission may decide to adopt a final decision imposing additional fines and/or request certain behavioral or structural commitments from the Company. However, any additional potential losses incurred could be material to the Company’s results of operations, balance sheet, and cash flows.

XML

Pension Plans And Other Postretirement Benefits

6 Months Ended

Jun. 30, 2022

Pension Plans and Other Postretirement Benefits

Pension Plans and Other Postretirement Benefits

NOTE 14—PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS

The components of net periodic benefit costs for all significant plans were as follows:

	Three Months Ended				Three Months Ended
	June 30,				June 30,
	Non-U.S. Defined Benefit Pension Plans				U.S. Defined Benefit Pension (1)
	2022		2021		2022		2021
Net periodic benefit cost
Service cost	$	3.1	$	4.0	$	0.3	$	0.1
Interest cost		0.6		0.4		0.1		0.1
Expected return on plan assets		—		(0.1)		(0.3)		(0.2)
Amortization of prior service credit		(0.1)		(0.2)		—		—
Amortization of net loss		0.6		1.6		—		—
Settlement and curtailment gain		(1.9)		—		—		—
Net periodic benefit cost	$	2.3	$	5.7	$	0.1	$	—

	Six Months Ended				Six Months Ended
	June 30,				June 30,
	Non-U.S. Defined Benefit Pension Plans				U.S. Defined Benefit Pension (1)
	2022		2021		2022		2021
Net periodic benefit cost
Service cost	$	6.3	$	8.1	$	0.5	$	0.1
Interest cost		1.3		0.9		0.3		0.1
Expected return on plan assets		(0.1)		(0.1)		(0.5)		(0.2)
Amortization of prior service credit		(0.2)		(0.4)		—		—
Amortization of net loss		1.3		3.1		—		—
Settlement and curtailment gain		(1.9)		—		—		—
Net periodic benefit cost	$	6.7	$	11.6	$	0.3	$	—

(1) The Company’s U.S. defined benefit pension plans were acquired in 2021, primarily in conjunction with the PMMA Acquisition.

The Company had less than $0.1 million of net periodic benefit costs for its other postretirement plans for the three and six months ended June 30, 2022 and 2021.

Service cost related to the Company’s defined benefit pension plans and other postretirement plans is included within “Cost of sales” and “Selling, general and administrative expenses,” whereas all other components of net periodic benefit cost are included within “Other expense, net” in the condensed consolidated statements of operations. As of June 30, 2022 and December 31, 2021, the Company’s benefit obligations included primarily in “Other noncurrent obligations” in the condensed consolidated balance sheets were $249.4 million and $274.7 million, respectively.

The Company made cash contributions and benefit payments to unfunded plans of approximately $2.1 million and $4.6 million during the three and six months ended June 30, 2022, respectively. The Company expects to make additional cash contributions, including benefit payments to unfunded plans, of approximately $4.2 million to its defined benefit plans for the remainder of 2022.

XML

Share-Based Compensation

6 Months Ended

Jun. 30, 2022

Share-Based Compensation.

Share-Based Compensation

NOTE 15—SHARE-BASED COMPENSATION

Refer to the Annual Report for definitions of capitalized terms not included herein and further background on the

Company’s share-based compensation programs included in the tables below.

The following table summarizes the Company’s share-based compensation expense for the three and six months ended June 30, 2022 and 2021, as well as unrecognized compensation cost as of June 30, 2022:

									As of
	Three Months Ended				Six Months Ended				June 30, 2022
	June 30,				June 30,				Unrecognized		Weighted
	2022		2021		2022		2021		Compensation Cost		Average Years
RSUs	$	2.4	$	1.9	$	7.0	$	3.6	$	13.7	1.9
Options		0.7		1.1		3.8		2.2		3.4	1.6
PSUs		0.7		0.7		1.4		1.2		5.1	2.2
Total share-based compensation expense	$	3.8	$	3.7	$	12.2	$	7.0

The following table summarizes awards granted and the respective weighted average grant date fair value for the six months ended June 30, 2022:

	Six Months Ended
	June 30, 2022
	Awards Granted		Weighted Average Grant Date Fair Value per Award
RSUs		196,071	$	52.31
Options		192,175		22.52
PSUs		63,317		57.47

Option Awards

The following are the weighted average assumptions used within the Black-Scholes pricing model for the Company’s option awards granted during the six months ended June 30, 2022:

	Six Months Ended
	June 30, 2022
Expected term (in years)	5.50
Expected volatility	48.72	%
Risk-free interest rate	1.97	%
Dividend yield	2.00	%

The expected volatility assumption is determined based on the historical volatility of the Company’s publicly traded ordinary shares. The expected term of option awards represents the period of time that option awards granted are expected to be outstanding. For the option awards granted during the six months ended June 30, 2022, the simplified method was used to calculate the expected term, given the Company’s limited historical exercise data. The risk-free interest rate for the periods within the expected term of option awards is based on the U.S. Treasury yield curve in effect at the time of grant. The dividend yield is estimated based on historical and expected dividend activity.

Performance Share Units (PSUs)

The following are the weighted average assumptions used within the Monte Carlo valuation model for PSUs granted during the six months ended June 30, 2022:

		Six Months Ended
		June 30, 2022
Expected term (in years)		3.00
Expected volatility		57.30	%
Risk-free interest rate		1.73	%
Share price	$	58.64

Determining the fair value of PSUs requires considerable judgment, including estimating the expected volatility of the price of the Company’s ordinary shares, the correlation between the Company’s share price and that of its peer companies, and the expected rate of interest. The expected volatility for each grant is determined based on the historical volatility of the Company’s ordinary shares. The expected term of PSUs represents the length of the performance period. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for a duration equivalent to the performance period. The share price is the closing price of the Company’s ordinary shares on the grant date.

XML

Segments

6 Months Ended

Jun. 30, 2022

Segments

Segments

NOTE 16—SEGMENTS

The Company operates under six segments: Engineered Materials, Latex Binders, Base Plastics, Polystyrene, Feedstocks, and Americas Styrenics. The Engineered Materials segment includes the Company’s compounds and blends products sold into higher growth and value applications, such as consumer electronics and medical, as well as soft thermoplastic elastomers (“TPEs”) products which are sold into markets such as footwear and automotive. Additionally, following the PMMA Acquisition on May 3, 2021 and the Aristech Surfaces Acquisition on September 1, 2021, the Engineered Materials segment also includes PMMA and MMA products, which are sold into a variety of applications including automotive, building & construction, medical, consumer electronics, and wellness, among others. The Latex Binders segment produces styrene-butadiene latex (“SB latex”) and other latex polymers and binders, primarily for coated paper and packaging board, carpet and artificial turf backings, as well as a number of performance latex binders applications, such as adhesive, building and construction and the technical textile paper market. The Base Plastics segment contains the results of the acrylonitrile-butadiene-styrene (“ABS”), styrene-acrylonitrile (“SAN”), and polycarbonate (“PC”) businesses, as well as compounds and blends for automotive and other applications. The Base Plastics segment also includes the results of Heathland, which was acquired in the first quarter of 2022. The Polystyrene segment includes a variety of general purpose polystyrenes (“GPPS”) and polystyrene that has been modified with polybutadiene rubber to increase its impact resistant properties (“HIPS”). The Feedstocks segment includes the Company’s production and procurement of styrene monomer outside of North America, which is used as a key raw material in many of the Company’s products, including polystyrene, SB latex, and ABS resins. Lastly, the Americas Styrenics segment consists solely of the operations of the Company’s 50%-owned joint venture, Americas Styrenics, a producer of both styrene monomer and polystyrene in North America.

The following table provides disclosure of the Company’s segment Adjusted EBITDA, which is used to measure segment operating performance and is defined below, for the three and six months ended June 30, 2022 and 2021. Asset and intersegment sales information by reporting segment is not regularly reviewed or included with the Company’s reporting to the chief operating decision maker. Therefore, this information has not been disclosed below. Refer to Note

5 for the Company’s net sales to external customers by segment for the three and six months ended June 30, 2022 and 2021.

	Engineered		Latex		Base						Americas
Three Months Ended (1)	Materials		Binders		Plastics		Polystyrene		Feedstocks		Styrenics
June 30, 2022	$	34.0	$	29.4	$	46.1	$	23.0	$	14.2	$	39.4
June 30, 2021	$	27.8	$	32.2	$	82.0	$	51.1	$	39.8	$	30.1

	Engineered		Latex		Base						Americas
Six Months Ended (1)	Materials		Binders		Plastics		Polystyrene		Feedstocks		Styrenics
June 30, 2022	$	68.7	$	59.6	$	114.7	$	68.3	$	18.3	$	61.0
June 30, 2021	$	35.8	$	49.0	$	147.5	$	98.4	$	86.1	$	53.0

(1) The Company’s primary measure of segment operating performance is Adjusted EBITDA, which is defined as income from continuing operations before interest expense, net; provision for income taxes; 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. Segment Adjusted EBITDA is a key metric that is used by management to evaluate business performance in comparison to budgets, forecasts, and prior year financial results, providing a measure that management believes reflects core operating performance by removing the impact of transactions and events that would not be considered a part of core operations. Other companies in the industry may define segment Adjusted EBITDA differently than the Company, and as a result, it may be difficult to use segment Adjusted EBITDA, or similarly named financial measures, that other companies may use to compare the performance of those companies to the Company’s segment performance.

The reconciliation of income from continuing operations before income taxes to segment Adjusted EBITDA is as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Income from continuing operations before income taxes	$	67.9	$	156.3	$	107.6	$	242.2
Interest expense, net		25.4		21.6		47.3		33.6
Depreciation and amortization		48.1		38.1		101.1		61.2
Corporate Unallocated(2)		21.6		23.9		48.5		46.4
Adjusted EBITDA Addbacks(3)		23.1		23.1		86.1		86.4
Segment Adjusted EBITDA	$	186.1	$	263.0	$	390.6	$	469.8

(2) Corporate unallocated includes corporate overhead costs and certain other income and expenses.

(3) Adjusted EBITDA addbacks for the three and six months ended June 30, 2022 and 2021 are as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Net gain on disposition of businesses and assets	$	(1.5)	$	—	$	(1.8)	$	(0.2)
Restructuring and other charges (Note 17)		(1.5)		6.3		(1.0)		6.7
Acquisition transaction and integration net costs (Note 3)		2.7		43.2		5.9		49.2
Acquisition purchase price hedge (gain) loss (Note 10)		—		(33.0)		—		22.0
Asset impairment charges or write-offs (Note 11)		1.3		1.8		2.0		1.8
European Commission request for information (Note 13)		—		—		35.6		—
Other items (a)		22.1		4.8		45.4		6.9
Total Adjusted EBITDA Addbacks	$	23.1	$	23.1	$	86.1	$	86.4

(a) Other items for the three and six months ended June 30, 2022 primarily relate to fees incurred in conjunction with certain of the Company’s strategic initiatives, as well as our transition to a new enterprise resource planning system. Other items for the three and six months ended June 30, 2021 primarily relate to fees incurred in conjunction with certain of the Company’s strategic initiatives.

XML

Restructuring

6 Months Ended

Jun. 30, 2022

Restructuring

Restructuring

NOTE 17—RESTRUCTURING

Refer to the Annual Report for further details regarding the Company’s previously announced restructuring activities included in the tables below. Restructuring charges are included within “Selling, general and administrative expenses” in the condensed consolidated statements of operations.

The following table provides detail of the Company’s restructuring charges for the three and six months ended June 30, 2022 and 2021:

	Three Months Ended				Six Months Ended				Cumulative
	June 30,				June 30,				Life-to-date
	2022		2021		2022		2021		Charges		Segment
Transformational Restructuring Program
Employee termination benefits	$	(0.2)	$	6.2	$	0.1	$	6.2	$	8.8	N/A(1)
Transformational Restructuring Program Subtotal	$	(0.2)	$	6.2	$	0.1	$	6.2	$	8.8
Other Restructurings		(1.3)		(0.3)		(1.1)		0.1			Various
Total Restructuring Charges	$	(1.5)	$	5.9	$	(1.0)	$	6.3

(1) In May 2021, the Company approved a transformational restructuring program associated with the Company’s recent strategic initiatives. The Company expects to incur incremental employee termination benefit charges related to impacted employees as of June 30, 2022 of less than $1.0 million, the majority of which are expected to be paid by December 31, 2022. As this was identified as a corporate-related activity, the charges related to this restructuring program were not allocated to a specific segment, but rather included within corporate unallocated.

The following table provides a roll forward of the liability balances associated with the Company’s restructuring activities as of June 30, 2022. Employee termination benefit and contract termination charges are primarily recorded within “Accrued expenses and other current liabilities” in the condensed consolidated balance sheets.

	Balance at						Balance at
	December 31, 2021		Expenses		Deductions(1)		June 30, 2022
Employee termination benefits	$	10.0	$	(1.4)	$	(3.2)	$	5.4
Decommissioning and other		—		0.1		(0.1)		—
Total	$	10.0	$	(1.3)	$	(3.3)	$	5.4

(1) Primarily includes payments made against the existing accrual, as well as immaterial impacts of foreign currency remeasurement.

XML

Accumulated Other Comprehensive Income (Loss)

6 Months Ended

Jun. 30, 2022

Accumulated Other Comprehensive Income (Loss).

Accumulated Other Comprehensive Income (Loss)

NOTE 18—ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The components of AOCI, net of income taxes, consisted of:

	Cumulative		Pension & Other
	Translation		Postretirement Benefit			Cash Flow
Three Months Ended June 30, 2022 and 2021	Adjustments		Plans, Net			Hedges, Net	Total
Balance as of March 31, 2022	$	(118.6)	$	(33.3)	$	2.2	$	(149.7)
Other comprehensive income (loss)		(34.8)		7.7		—		(27.1)
Amounts reclassified from AOCI to net income(1)		—		(1.4)		0.3		(1.1)
Balance as of June 30, 2022	$	(153.4)	$	(27.0)	$	2.5	$	(177.9)
Balance as of March 31, 2021	$	(108.6)	$	(70.8)	$	(0.6)	$	(180.0)
Other comprehensive income (loss)		(0.7)		—		(1.1)		(1.8)
Amounts reclassified from AOCI to net income (1)		—		1.0		0.9		1.9
Balance as of June 30, 2021	$	(109.3)	$	(69.8)	$	(0.8)	$	(179.9)

	Cumulative		Pension & Other
	Translation		Postretirement Benefit		Cash Flow
Six Months Ended June 30, 2022 and 2021	Adjustments		Plans, Net		Hedges, Net		Total
Balance as of December 31, 2021	$	(114.3)	$	(33.6)	$	0.7	$	(147.2)
Other comprehensive income (loss)		(39.1)		7.7		0.7		(30.7)
Amounts reclassified from AOCI to net income(1)		—		(1.1)		1.1		—
Balance as of June 30, 2022	$	(153.4)	$	(27.0)	$	2.5	$	(177.9)
Balance as of December 31, 2020	$	(109.0)	$	(71.9)	$	(5.2)	$	(186.1)
Other comprehensive income (loss)		(0.3)		—		2.4		2.1
Amounts reclassified from AOCI to net income(1)		—		2.1		2.0		4.1
Balance as of June 30, 2021	$	(109.3)	$	(69.8)	$	(0.8)	$	(179.9)

(1) The following is a summary of amounts reclassified from AOCI to net income (loss) for the three and six months ended June 30, 2022 and 2021:

	Three Months Ended				Six Months Ended
	June 30,				June 30,				Statements of Operations
AOCI Components	2022		2021		2022		2021		Classification
Cash flow hedging items
Foreign exchange cash flow hedges	$	—	$	—	$	—	$	0.3	Cost of sales
Interest rate swaps		0.6		0.9		1.4		1.7	Interest expense, net
Total before tax		0.6		0.9		1.4		2.0
Tax effect		(0.3)		—		(0.3)		—	Provision for income taxes
Total, net of tax	$	0.3	$	0.9	$	1.1	$	2.0
Amortization of pension and other postretirement benefit plan items
Prior service credit	$	(0.1)	$	(0.2)	$	(0.2)	$	(0.5)	(a)
Net actuarial loss		0.6		1.7		1.2		3.6	(a)
Net curtailment and settlement gain		(1.9)		—		(1.9)		—	(a)
Total before tax		(1.4)		1.5		(0.9)		3.1
Tax effect		—		(0.5)		(0.2)		(1.0)	Provision for income taxes
Total, net of tax	$	(1.4)	$	1.0	$	(1.1)	$	2.1

(a) These AOCI components are included in the computation of net periodic benefit costs (see Note 14).

.

XML

Earnings Per Share

6 Months Ended

Jun. 30, 2022

Earnings Per Share

Earnings Per Share

NOTE 19—EARNINGS PER SHARE

Basic earnings per ordinary share (“basic EPS”) is computed by dividing net income available to ordinary shareholders by the weighted average number of the Company’s ordinary shares outstanding for the applicable period. Diluted earnings per ordinary share (“diluted EPS”) is calculated using net income available to ordinary shareholders divided by diluted weighted average ordinary shares outstanding during each period, which includes unvested RSUs, option awards, and PSUs. Diluted EPS considers the impact of potentially dilutive securities except in periods in which there is a loss from continuing operations because the inclusion of the potential ordinary shares would have an anti-dilutive effect.

The following table presents basic EPS and diluted EPS for the three and six months ended June 30, 2022 and 2021.

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in millions, except per share data)	2022		2021		2022		2021
Earnings:
Net income from continuing operations	$	37.1	$	133.0	$	54.2	$	198.8
Net income from discontinued operations		0.3		18.6		—		24.3
Net income	$	37.4	$	151.6	$	54.2	$	223.1
Shares:
Weighted average ordinary shares outstanding		36.3		38.8		36.8		38.6
Dilutive effect of RSUs, option awards, and PSUs(1)		0.7		0.8		0.8		1.0
Diluted weighted average ordinary shares outstanding		37.0		39.6		37.6		39.6
Income per share:
Income per share—basic:
Continuing operations	$	1.02	$	3.43	$	1.47	$	5.15
Discontinued operations		0.01		0.48		—		0.62
Income per share—basic	$	1.03	$	3.91	$	1.47	$	5.77
Income per share—diluted:
Continuing operations	$	1.00	$	3.35	$	1.44	$	5.02
Discontinued operations		0.01		0.47		—		0.61
Income per share—diluted	$	1.01	$	3.82	$	1.44	$	5.63

(1) Refer to Note 15 for discussion of RSUs, option awards, and PSUs granted to certain Company directors and employees. There were 1.0 million and 0.9 million anti-dilutive shares that have been excluded from the computation of diluted earnings per share for the three and six months ended June 30, 2022, respectively, and 0.6 million for the three and six months ended June 30, 2021.

XML

Other Charges

6 Months Ended

Jun. 30, 2022

Other Charges

Other Charges

NOTE 20—OTHER CHARGES

Other charges consisted of the following:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Asset impairment charges or write-offs (Note 11)	$	1.3	$	1.8	$	2.0	$	1.8
European Commission request for information (Note 13)		—		—		35.6		—
Total	$	1.3	$	1.8	$	37.6	$	1.8

XML

Basis of Presentation (Policies)

6 Months Ended

Jun. 30, 2022

Basis of Presentation

Basis of Presentation

The unaudited interim condensed consolidated financial statements of Trinseo PLC and its subsidiaries (the “Company”) as of and for the periods ended June 30, 2022 and 2021 were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and reflect all adjustments, consisting only of normal recurring adjustments, which, in the opinion of management, are considered necessary for the fair statement of the results for the periods presented. Because they cover interim periods, the statements and related notes to the financial statements do not include all disclosures normally provided in annual financial statements, and therefore, these statements should be read in conjunction with the 2021 audited consolidated financial statements included within the Company’s Annual Report on Form 10-K (“Annual Report”) filed with the Securities and Exchange Commission (“SEC”) on February 23, 2022. The Company’s condensed consolidated financial statements presented herein reflect the latest estimates and assumptions made by management that affect the reported amounts and related disclosures as of and for the period ended June 30, 2022. However, actual results could differ from these estimates and assumptions.

The December 31, 2021 condensed consolidated balance sheet data presented herein was derived from the Company’s December 31, 2021 audited consolidated financial statements, but does not include all disclosures required by GAAP for annual periods.

Certain prior year amounts have been reclassified to conform to the current year presentation. Throughout this Quarterly Report, unless otherwise indicated, amounts and activity are presented on a continuing operations basis.

XML

Acquisitions (Tables)

6 Months Ended

Jun. 30, 2022

Business Acquisition [Line Items]

Schedule of unaudited pro forma financial information

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2021		2021
Net sales	$	1,369.4	$	2,563.6
Net income	$	185.5	$	261.1
Income from continuing operations	$	166.9	$	236.8

Heathland B.V.

Business Acquisition [Line Items]

Schedule of purchase price allocation

	January 3,
	2022
Cash and cash equivalents	$	1.0
Other current assets		1.2
Other intangible assets (1)
Customer relationships		5.1
Tradenames		0.9
Developed technology		0.2
Other assets		1.0
Total fair value of assets acquired		9.4
Current liabilities		(1.3)
Noncurrent liabilities		(1.6)
Total fair value of liabilities assumed		(2.9)
Net identifiable assets acquired		6.5
Purchase price consideration		29.3
Goodwill (2)	$	22.8

(1) The expected weighted average useful life of the acquired intangible assets are 7 years for customer relationships, tradenames and developed technology.

(2) Goodwill largely consists of strategic and synergistic opportunities resulting from combining Heathland with the Company’s existing businesses and is allocated entirely to the Base Plastics segment. No goodwill related to this acquisition is expected to be deductible for income tax purposes.

XML

Divestitures And Discontinued Operations (Tables)

6 Months Ended

Jun. 30, 2022

Emulsion Polymers, Synthetic Rubber | Discontinued Operations, Held-for-sale

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Summary of the assets and liabilities classified as held-for-sale and results reflected as discontinued operations

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Net sales	$	—	$	135.7	$	0.1	$	259.9
Cost of sales		0.8		108.2		1.4		219.3
Gross profit (loss)		(0.8)		27.5		(1.3)		40.6
Selling, general and administrative expenses		(0.1)		5.6		(0.3)		11.8
Operating income (loss)		(0.7)		21.9		(1.0)		28.8
Gain on sale of businesses and other assets		1.2		—		1.2		—
Other expense, net		—		0.8		—		1.0
Income from discontinued operations before income taxes		0.5		21.1		0.2		27.8
Provision for income taxes		0.2		2.5		0.2		3.5
Net income from discontinued operations	$	0.3	$	18.6	$	—	$	24.3

XML

Net Sales (Tables)

6 Months Ended

Jun. 30, 2022

Net Sales

Disaggregation of Revenue [Table Text Block]

	Engineered		Latex		Base
Three Months Ended	Materials		Binders		Plastics		Polystyrene		Feedstocks		Total
June 30, 2022
United States	$	150.7	$	102.5	$	106.1	$	—	$	4.6	$	363.9
Europe		108.9		169.4		198.5		215.9		92.0		784.7
Asia-Pacific		38.2		79.3		31.6		96.0		—		245.1
Rest of World		3.5		2.5		25.7		0.1		—		31.8
Total	$	301.3	$	353.7	$	361.9	$	312.0	$	96.6	$	1,425.5
June 30, 2021
United States	$	60.9	$	74.1	$	71.6	$	—	$	3.3	$	209.9
Europe		80.3		160.5		253.8		199.8		68.0		762.4
Asia-Pacific		37.8		74.3		51.9		113.5		—		277.5
Rest of World		2.0		2.3		19.6		—		—		23.9
Total	$	181.0	$	311.2	$	396.9	$	313.3	$	71.3	$	1,273.7

	Engineered		Latex		Base
Six Months Ended	Materials		Binders		Plastics		Polystyrene		Feedstocks		Total
June 30, 2022
United States	$	289.1	$	184.7	$	190.6	$	—	$	8.5	$	672.9
Europe		227.6		320.3		445.1		430.5		158.4		1,581.9
Asia-Pacific		73.5		151.0		68.8		199.4		—		492.7
Rest of World		6.3		4.4		53.9		0.1		—		64.7
Total	$	596.5	$	660.4	$	758.4	$	630.0	$	166.9	$	2,812.2
June 30, 2021
United States	$	71.1	$	141.9	$	134.2	$	—	$	6.7	$	353.9
Europe		101.4		278.1		451.7		349.0		138.1		1,318.3
Asia-Pacific		72.1		138.1		100.6		231.1		—		541.9
Rest of World		2.2		4.1		39.3		—		—		45.6
Total	$	246.8	$	562.2	$	725.8	$	580.1	$	144.8	$	2,259.7

XML

Investments in Unconsolidated Affiliates (Tables)

6 Months Ended

Jun. 30, 2022

Investments in Unconsolidated Affiliates

Summarized Financial Information of Unconsolidated Affiliates

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Sales	$	594.6	$	495.6	$	1,119.0	$	918.5
Gross profit	$	93.5	$	74.5	$	141.6	$	139.9
Net income	$	80.1	$	63.6	$	116.2	$	114.6

XML

Inventories (Tables)

6 Months Ended

Jun. 30, 2022

Inventories

Schedule of Inventories

	June 30,		December 31,
	2022		2021
Finished goods	$	352.9	$	279.2
Raw materials and semi-finished goods		370.1		303.9
Supplies		36.7		37.9
Total	$	759.7	$	621.0

XML

Debt (Tables)

6 Months Ended

Jun. 30, 2022

Debt

Schedule of Debt [Table Text Block]

			June 30, 2022						December 31, 2021
	Interest Rate as of June 30, 2022	Maturity Date	Carrying Amount		Unamortized Deferred Financing Fees (1)		Total Debt, Less Unamortized Deferred Financing Fees		Carrying Amount		Unamortized Deferred Financing Fees (1)		Total Debt, Less Unamortized Deferred Financing Fees
Senior Credit Facility
2024 Term Loan B	3.666%	September 2024	$	666.9	$	(6.6)	$	660.3	$	670.4	$	(8.0)	$	662.4
2028 Term Loan B	4.166%	May 2028		739.3		(15.7)		723.6		742.8		(17.0)		725.8
2026 Revolving Facility(2)	Various	May 2026		—		—		—		—		—		—
2029 Senior Notes	5.125%	April 2029		450.0		(13.8)		436.2		450.0		(14.7)		435.3
2025 Senior Notes	5.375%	September 2025		500.0		(4.4)		495.6		500.0		(5.0)		495.0
Accounts Receivable Securitization Facility(3)	Various	November 2024		—		—		—		—		—		—
Other indebtedness	Various	Various		4.3		—		4.3		5.6		—		5.6
Total debt			$	2,360.5	$	(40.5)	$	2,320.0	$	2,368.8	$	(44.7)	$	2,324.1
Less: current portion(4)								(17.7)						(18.5)
Total long-term debt, net of unamortized deferred financing fees							$	2,302.3					$	2,305.6

(1) This caption does not include deferred financing fees related to the Company’s revolving facilities, which are included within “Deferred charges and other assets” on the condensed consolidated balance sheets.

(2) As of June 30, 2022, under the 2026 Revolving Facility, the Company had a capacity of $375.0 million and funds available for borrowing of $368.9 million (net of $6.1 million outstanding letters of credit). Additionally, the Company is required to pay a quarterly commitment fee in respect of any unused commitments under this facility equal to 0.375% per annum.

(3) As of June 30, 2022, this facility had a borrowing capacity of $150.0 million, and the Company had approximately $150.0 million of accounts receivable available to support this facility, based on the pool of eligible accounts receivable.

(4) The current portion of long-term debt was primarily related to $14.5 million of the scheduled future principal payments on both the 2024 Term Loan B and 2028 Term Loan B as of June 30, 2022 and December 31, 2021.

XML

Goodwill (Tables)

6 Months Ended

Jun. 30, 2022

Goodwill.

Changes in Carrying Amount of Goodwill, by Segment

	Engineered		Latex		Base						Americas
	Materials		Binders		Plastics		Polystyrene		Feedstocks		Styrenics		Total
Balance at December 31, 2021	$	667.3	$	15.9	$	22.4	$	4.5	$	—	$	—	$	710.1
Acquisitions (Note 3)		—		—		22.8		—		—		—		22.8
Foreign currency impact		(17.6)		(1.6)		(3.8)		(0.5)		—		—		(23.5)
Balance at June 30, 2022	$	649.7	$	14.3	$	41.4	$	4.0	$	—	$	—	$	709.4

XML

Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2022

Derivative Instruments

Notional Amounts of Most Significant Net Foreign Exchange Hedge Positions Outstanding

	June 30,
Buy / (Sell)	2022
Euro	$	(564.7)
Chinese Yuan	$	(48.7)
New Taiwan Dollar	$	16.4
Swedish Krona	$	12.6
South Korean Won	$	(12.4)

Schedule of Effect of Derivative Instruments on Statements of Operations

	Location and Amount of Gain (Loss) Recognized in Statements of Operations
	Three Months Ended						Three Months Ended
	June 30, 2022						June 30, 2021
	Cost of sales		Interest expense, net		Other (expense) income, net		Cost of sales		Interest expense, net		Acquisition purchase price hedge gain (loss)		Other (expense) income, net
Total amount of income and (expense) line items presented in the statements of operations in which the effects of derivative instruments are recorded	$	(1,286.4)	$	(25.4)	$	1.7	$	(1,053.7)	$	(21.6)	$	33.0	$	(6.1)
The effects of cash flow hedge instruments:
Foreign exchange cash flow hedges
Amount of gain (loss) reclassified from AOCI into income	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Interest rate swaps
Amount of loss reclassified from AOCI into income	$	—	$	(0.6)	$	—	$	—	$	(0.9)	$	—	$	—
The effects of net investment hedge instruments:
Cross currency swaps (CCS)
Amount of gain excluded from effectiveness testing	$	—	$	0.3	$	—	$	—	$	1.7	$	—	$	—
The effects of derivatives not designated as hedge instruments:
Foreign exchange forward contracts
Amount of gain recognized in income (1)	$	—	$	—	$	39.1	$	—	$	—	$	33.0	$	0.4

	Location and Amount of Gain (Loss) Recognized in Statements of Operations
	Six Months Ended						Six Months Ended
	June 30, 2022						June 30, 2021
	Cost of sales		Interest expense, net		Other (expense) income, net		Cost of sales		Interest expense, net		Acquisition purchase price hedge gain (loss)		Other (expense) income, net
Total amount of income and (expense) line items presented in the statements of operations in which the effects of derivative instruments are recorded	$	(2,497.1)	$	(47.3)	$	(1.3)	$	(1,850.8)	$	(33.6)	$	(22.0)	$	(8.5)
The effects of cash flow hedge instruments:
Foreign exchange cash flow hedges
Amount of gain (loss) reclassified from AOCI into income	$	—	$	—	$	—	$	(0.3)	$	—	$	—	$	—
Interest rate swaps
Amount of loss reclassified from AOCI into income	$	—	$	(1.4)	$	—	$	—	$	(1.7)	$	—	$	—
The effects of net investment hedge instruments:
Cross currency swaps (CCS)
Amount of gain excluded from effectiveness testing	$	—	$	2.4	$	—	$	—	$	3.6	$	—	$	—
The effects of derivatives not designated as hedge instruments:
Foreign exchange forward contracts
Amount of gain recognized in income (1)	$	—	$	—	$	47.9	$	—	$	—	$	(22.0)	$	20.1

(1) The $33.0 million gain and $22.0 million loss incurred from the change in fair value of the forward currency hedge arrangement on the euro-denominated purchase price of the Arkema PMMA business during the three and six months ended June 30, 2021, respectively, is presented separately in the condensed consolidated statements of operations from the gains recorded on the Company’s other foreign exchange forward contracts.

Schedule of Effect of Hedges on AOCI

`	Gain (Loss) Recognized in AOCI on Balance Sheet
	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Designated as Cash Flow Hedges
Foreign exchange cash flow hedges	$	—	$	(1.0)	$	—	$	2.7
Interest rate swaps		0.9		0.8		2.4		1.7
Total	$	0.9	$	(0.2)	$	2.4	$	4.4
Designated as Net Investment Hedges
Cross currency swaps (CCS)	$	9.7	$	(7.1)	$	15.8	$	19.1
Total	$	9.7	$	(7.1)	$	15.8	$	19.1

	Gain (Loss) Recognized in Other expense, net in Statement of Operations
	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Settlements and changes in the fair value of forward contracts (not designated as hedges) (1)	$	39.1	$	0.4	$	47.9	$	20.1
Remeasurement of foreign currency-denominated assets and liabilities	$	(37.8)	$	0.6	$	(48.0)	$	(19.3)
Total	$	1.3	$	1.0	$	(0.1)	$	0.8

(1) Amount does not include the gain of $33.0 million and loss of $22.0 million recorded from the change in fair value of the forward currency hedge arrangement on the euro-denominated purchase price of the Arkema PMMA business during the three and six months ended June 30, 2021, respectively.

Schedule of Gross and Net Unrealized Gains and Losses and Balance Sheet Classification

	June 30, 2022
	Foreign
	Exchange		Interest
Balance Sheet	Forward		Rate
Classification	Contracts		Swaps		Total
Asset Derivatives:
Accounts receivable, net of allowance	$	18.2	$	0.2	$	18.4
Gross derivative asset position		18.2		0.2		18.4
Less: Counterparty netting		(0.7)		—		(0.7)
Net derivative asset position	$	17.5	$	0.2	$	17.7
Liability Derivatives:
Accounts payable	$	(1.3)	$	—	$	(1.3)
Gross derivative liability position		(1.3)		—		(1.3)
Less: Counterparty netting		0.6		—		0.6
Net derivative liability position	$	(0.7)	$	—	$	(0.7)
Total net derivative position	$	16.8	$	0.2	$	17.0

	December 31, 2021
	Foreign
	Exchange		Interest		Cross
Balance Sheet	Forward		Rate		Currency
Classification	Contracts		Swaps		Swaps		Total
Asset Derivatives:
Accounts receivable, net of allowance	$	2.3	$	—	$	—	$	2.3
Gross derivative asset position		2.3		—		—		2.3
Less: Counterparty netting		(0.1)		—		—		(0.1)
Net derivative asset position	$	2.2	$	—	$	—	$	2.2
Liability Derivatives:
Accounts payable	$	(1.3)	$	(2.2)	$	(17.4)	$	(20.9)
Gross derivative liability position		(1.3)		(2.2)		(17.4)		(20.9)
Less: Counterparty netting		0.1		—		—		0.1
Net derivative liability position	$	(1.2)	$	(2.2)	$	(17.4)	$	(20.8)
Total net derivative position	$	1.0	$	(2.2)	$	(17.4)	$	(18.6)

XML

Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2022

Fair Value Measurements

Schedule of Assets and Liabilities at Fair Value on Recurring Basis

	June 30, 2022
	Quoted Prices in Active Markets for Identical Items		Significant Other Observable Inputs		Significant Unobservable Inputs
Assets (Liabilities) at Fair Value	(Level 1)		(Level 2)		(Level 3)		Total
Foreign exchange forward contracts—Assets	$	—	$	17.5	$	—	$	17.5
Foreign exchange forward contracts—(Liabilities)		—		(0.7)		—		(0.7)
Interest rate swaps—Assets		—		0.2		—		0.2
Total fair value	$	—	$	17.0	$	—	$	17.0

	December 31, 2021
	Quoted Prices in Active Markets for Identical Items		Significant Other Observable Inputs		Significant Unobservable Inputs
Assets (Liabilities) at Fair Value	(Level 1)		(Level 2)		(Level 3)		Total
Foreign exchange forward contracts—Assets	$	—	$	2.2	$	—	$	2.2
Foreign exchange forward contracts—(Liabilities)		—		(1.2)		—		(1.2)
Interest rate swaps—(Liabilities)		—		(2.2)		—		(2.2)
Cross currency swaps—(Liabilities)		—		(17.4)		—		(17.4)
Total fair value	$	—	$	(18.6)	$	—	$	(18.6)

Estimated Fair Value of Outstanding Debt Not Carried at Fair Value

	As of		As of
	June 30, 2022		December 31, 2021
2029 Senior Notes	$	323.5	$	460.2
2028 Term Loan B		700.1		737.4
2025 Senior Notes		426.7		509.4
2024 Term Loan B		634.0		667.5
Total fair value	$	2,084.3	$	2,374.5

XML

Provision For Income Taxes (Tables)

6 Months Ended

Jun. 30, 2022

Provision For Income Taxes

Schedule of Effective Tax Rate

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2022			2021			2022			2021
Effective income tax rate		45.4	%		14.9	%		49.7	%		17.9	%

XML

Pension Plans and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2022

Pension Plans and Other Postretirement Benefits

Schedule of Net Periodic Benefit Costs

	Three Months Ended				Three Months Ended
	June 30,				June 30,
	Non-U.S. Defined Benefit Pension Plans				U.S. Defined Benefit Pension (1)
	2022		2021		2022		2021
Net periodic benefit cost
Service cost	$	3.1	$	4.0	$	0.3	$	0.1
Interest cost		0.6		0.4		0.1		0.1
Expected return on plan assets		—		(0.1)		(0.3)		(0.2)
Amortization of prior service credit		(0.1)		(0.2)		—		—
Amortization of net loss		0.6		1.6		—		—
Settlement and curtailment gain		(1.9)		—		—		—
Net periodic benefit cost	$	2.3	$	5.7	$	0.1	$	—

	Six Months Ended				Six Months Ended
	June 30,				June 30,
	Non-U.S. Defined Benefit Pension Plans				U.S. Defined Benefit Pension (1)
	2022		2021		2022		2021
Net periodic benefit cost
Service cost	$	6.3	$	8.1	$	0.5	$	0.1
Interest cost		1.3		0.9		0.3		0.1
Expected return on plan assets		(0.1)		(0.1)		(0.5)		(0.2)
Amortization of prior service credit		(0.2)		(0.4)		—		—
Amortization of net loss		1.3		3.1		—		—
Settlement and curtailment gain		(1.9)		—		—		—
Net periodic benefit cost	$	6.7	$	11.6	$	0.3	$	—

(1) The Company’s U.S. defined benefit pension plans were acquired in 2021, primarily in conjunction with the PMMA Acquisition.

XML

Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Share-Based Compensation Expense and Unrecognized Compensation Cost

									As of
	Three Months Ended				Six Months Ended				June 30, 2022
	June 30,				June 30,				Unrecognized		Weighted
	2022		2021		2022		2021		Compensation Cost		Average Years
RSUs	$	2.4	$	1.9	$	7.0	$	3.6	$	13.7	1.9
Options		0.7		1.1		3.8		2.2		3.4	1.6
PSUs		0.7		0.7		1.4		1.2		5.1	2.2
Total share-based compensation expense	$	3.8	$	3.7	$	12.2	$	7.0

Summary of Awards Granted and Weighted Average Grant-Date Fair Value

	Six Months Ended
	June 30, 2022
	Awards Granted		Weighted Average Grant Date Fair Value per Award
RSUs		196,071	$	52.31
Options		192,175		22.52
PSUs		63,317		57.47

Option Awards

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Weighted-average Assumptions

	Six Months Ended
	June 30, 2022
Expected term (in years)	5.50
Expected volatility	48.72	%
Risk-free interest rate	1.97	%
Dividend yield	2.00	%

Performance Share Units

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Weighted-average Assumptions

		Six Months Ended
		June 30, 2022
Expected term (in years)		3.00
Expected volatility		57.30	%
Risk-free interest rate		1.73	%
Share price	$	58.64

XML

Segments (Tables)

6 Months Ended

Jun. 30, 2022

Segments

Reconciliation of Segment Reporting to Consolidated

	Engineered		Latex		Base						Americas
Three Months Ended (1)	Materials		Binders		Plastics		Polystyrene		Feedstocks		Styrenics
June 30, 2022	$	34.0	$	29.4	$	46.1	$	23.0	$	14.2	$	39.4
June 30, 2021	$	27.8	$	32.2	$	82.0	$	51.1	$	39.8	$	30.1

	Engineered		Latex		Base						Americas
Six Months Ended (1)	Materials		Binders		Plastics		Polystyrene		Feedstocks		Styrenics
June 30, 2022	$	68.7	$	59.6	$	114.7	$	68.3	$	18.3	$	61.0
June 30, 2021	$	35.8	$	49.0	$	147.5	$	98.4	$	86.1	$	53.0

(1) The Company’s primary measure of segment operating performance is Adjusted EBITDA, which is defined as income from continuing operations before interest expense, net; provision for income taxes; 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. Segment Adjusted EBITDA is a key metric that is used by management to evaluate business performance in comparison to budgets, forecasts, and prior year financial results, providing a measure that management believes reflects core operating performance by removing the impact of transactions and events that would not be considered a part of core operations. Other companies in the industry may define segment Adjusted EBITDA differently than the Company, and as a result, it may be difficult to use segment Adjusted EBITDA, or similarly named financial measures, that other companies may use to compare the performance of those companies to the Company’s segment performance.

Reconciliation of IBT to Adjusted EBITDA

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Income from continuing operations before income taxes	$	67.9	$	156.3	$	107.6	$	242.2
Interest expense, net		25.4		21.6		47.3		33.6
Depreciation and amortization		48.1		38.1		101.1		61.2
Corporate Unallocated(2)		21.6		23.9		48.5		46.4
Adjusted EBITDA Addbacks(3)		23.1		23.1		86.1		86.4
Segment Adjusted EBITDA	$	186.1	$	263.0	$	390.6	$	469.8

(2) Corporate unallocated includes corporate overhead costs and certain other income and expenses.

(3) Adjusted EBITDA addbacks for the three and six months ended June 30, 2022 and 2021 are as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Net gain on disposition of businesses and assets	$	(1.5)	$	—	$	(1.8)	$	(0.2)
Restructuring and other charges (Note 17)		(1.5)		6.3		(1.0)		6.7
Acquisition transaction and integration net costs (Note 3)		2.7		43.2		5.9		49.2
Acquisition purchase price hedge (gain) loss (Note 10)		—		(33.0)		—		22.0
Asset impairment charges or write-offs (Note 11)		1.3		1.8		2.0		1.8
European Commission request for information (Note 13)		—		—		35.6		—
Other items (a)		22.1		4.8		45.4		6.9
Total Adjusted EBITDA Addbacks	$	23.1	$	23.1	$	86.1	$	86.4

(a) Other items for the three and six months ended June 30, 2022 primarily relate to fees incurred in conjunction with certain of the Company’s strategic initiatives, as well as our transition to a new enterprise resource planning system. Other items for the three and six months ended June 30, 2021 primarily relate to fees incurred in conjunction with certain of the Company’s strategic initiatives.

XML

Restructuring (Tables)

6 Months Ended

Jun. 30, 2022

Restructuring

Detail of Restructuring Charges

	Three Months Ended				Six Months Ended				Cumulative
	June 30,				June 30,				Life-to-date
	2022		2021		2022		2021		Charges		Segment
Transformational Restructuring Program
Employee termination benefits	$	(0.2)	$	6.2	$	0.1	$	6.2	$	8.8	N/A(1)
Transformational Restructuring Program Subtotal	$	(0.2)	$	6.2	$	0.1	$	6.2	$	8.8
Other Restructurings		(1.3)		(0.3)		(1.1)		0.1			Various
Total Restructuring Charges	$	(1.5)	$	5.9	$	(1.0)	$	6.3

(1) In May 2021, the Company approved a transformational restructuring program associated with the Company’s recent strategic initiatives. The Company expects to incur incremental employee termination benefit charges related to impacted employees as of June 30, 2022 of less than $1.0 million, the majority of which are expected to be paid by December 31, 2022. As this was identified as a corporate-related activity, the charges related to this restructuring program were not allocated to a specific segment, but rather included within corporate unallocated.

Rollforward of Liability Balances

	Balance at						Balance at
	December 31, 2021		Expenses		Deductions(1)		June 30, 2022
Employee termination benefits	$	10.0	$	(1.4)	$	(3.2)	$	5.4
Decommissioning and other		—		0.1		(0.1)		—
Total	$	10.0	$	(1.3)	$	(3.3)	$	5.4

(1) Primarily includes payments made against the existing accrual, as well as immaterial impacts of foreign currency remeasurement.

XML

Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2022

Accumulated Other Comprehensive Income (Loss).

Components of AOCI, Net of Income Taxes

	Cumulative		Pension & Other
	Translation		Postretirement Benefit			Cash Flow
Three Months Ended June 30, 2022 and 2021	Adjustments		Plans, Net			Hedges, Net	Total
Balance as of March 31, 2022	$	(118.6)	$	(33.3)	$	2.2	$	(149.7)
Other comprehensive income (loss)		(34.8)		7.7		—		(27.1)
Amounts reclassified from AOCI to net income(1)		—		(1.4)		0.3		(1.1)
Balance as of June 30, 2022	$	(153.4)	$	(27.0)	$	2.5	$	(177.9)
Balance as of March 31, 2021	$	(108.6)	$	(70.8)	$	(0.6)	$	(180.0)
Other comprehensive income (loss)		(0.7)		—		(1.1)		(1.8)
Amounts reclassified from AOCI to net income (1)		—		1.0		0.9		1.9
Balance as of June 30, 2021	$	(109.3)	$	(69.8)	$	(0.8)	$	(179.9)

	Cumulative		Pension & Other
	Translation		Postretirement Benefit		Cash Flow
Six Months Ended June 30, 2022 and 2021	Adjustments		Plans, Net		Hedges, Net		Total
Balance as of December 31, 2021	$	(114.3)	$	(33.6)	$	0.7	$	(147.2)
Other comprehensive income (loss)		(39.1)		7.7		0.7		(30.7)
Amounts reclassified from AOCI to net income(1)		—		(1.1)		1.1		—
Balance as of June 30, 2022	$	(153.4)	$	(27.0)	$	2.5	$	(177.9)
Balance as of December 31, 2020	$	(109.0)	$	(71.9)	$	(5.2)	$	(186.1)
Other comprehensive income (loss)		(0.3)		—		2.4		2.1
Amounts reclassified from AOCI to net income(1)		—		2.1		2.0		4.1
Balance as of June 30, 2021	$	(109.3)	$	(69.8)	$	(0.8)	$	(179.9)

(1) The following is a summary of amounts reclassified from AOCI to net income (loss) for the three and six months ended June 30, 2022 and 2021:

Summary of amounts reclassified from AOCI to net income (loss)

	Three Months Ended				Six Months Ended
	June 30,				June 30,				Statements of Operations
AOCI Components	2022		2021		2022		2021		Classification
Cash flow hedging items
Foreign exchange cash flow hedges	$	—	$	—	$	—	$	0.3	Cost of sales
Interest rate swaps		0.6		0.9		1.4		1.7	Interest expense, net
Total before tax		0.6		0.9		1.4		2.0
Tax effect		(0.3)		—		(0.3)		—	Provision for income taxes
Total, net of tax	$	0.3	$	0.9	$	1.1	$	2.0
Amortization of pension and other postretirement benefit plan items
Prior service credit	$	(0.1)	$	(0.2)	$	(0.2)	$	(0.5)	(a)
Net actuarial loss		0.6		1.7		1.2		3.6	(a)
Net curtailment and settlement gain		(1.9)		—		(1.9)		—	(a)
Total before tax		(1.4)		1.5		(0.9)		3.1
Tax effect		—		(0.5)		(0.2)		(1.0)	Provision for income taxes
Total, net of tax	$	(1.4)	$	1.0	$	(1.1)	$	2.1

(a) These AOCI components are included in the computation of net periodic benefit costs (see Note 14).

XML

Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2022

Earnings Per Share

Schedule of Earnings per Share Basic and Diluted

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in millions, except per share data)	2022		2021		2022		2021
Earnings:
Net income from continuing operations	$	37.1	$	133.0	$	54.2	$	198.8
Net income from discontinued operations		0.3		18.6		—		24.3
Net income	$	37.4	$	151.6	$	54.2	$	223.1
Shares:
Weighted average ordinary shares outstanding		36.3		38.8		36.8		38.6
Dilutive effect of RSUs, option awards, and PSUs(1)		0.7		0.8		0.8		1.0
Diluted weighted average ordinary shares outstanding		37.0		39.6		37.6		39.6
Income per share:
Income per share—basic:
Continuing operations	$	1.02	$	3.43	$	1.47	$	5.15
Discontinued operations		0.01		0.48		—		0.62
Income per share—basic	$	1.03	$	3.91	$	1.47	$	5.77
Income per share—diluted:
Continuing operations	$	1.00	$	3.35	$	1.44	$	5.02
Discontinued operations		0.01		0.47		—		0.61
Income per share—diluted	$	1.01	$	3.82	$	1.44	$	5.63

(1) Refer to Note 15 for discussion of RSUs, option awards, and PSUs granted to certain Company directors and employees. There were 1.0 million and 0.9 million anti-dilutive shares that have been excluded from the computation of diluted earnings per share for the three and six months ended June 30, 2022, respectively, and 0.6 million for the three and six months ended June 30, 2021.

XML

Other Charges (Tables)

6 Months Ended

Jun. 30, 2022

Other Charges

Schedule of Other Charges

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Asset impairment charges or write-offs (Note 11)	$	1.3	$	1.8	$	2.0	$	1.8
European Commission request for information (Note 13)		—		—		35.6		—
Total	$	1.3	$	1.8	$	37.6	$	1.8

XML

Acquisitions - Heathland B.V (Details) - USD ($) $ in Millions	Jan. 03, 2022	Jun. 30, 2022	Dec. 31, 2021
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill		$ 709.4	$ 710.1
Heathland B.V.
Business Acquisition [Line Items]
Contingent payments to be paid	$ 6.4
Consideration paid upon signing the agreement	$ 22.9
Expected life	7 years
Contingent service fee	$ 4.5
Continuous employment period	3 years
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Cash and cash equivalents	$ 1.0
Current Assets	1.2
Noncurrent assets	1.0
Total fair value of assets acquired	9.4
Current liabilities	(1.3)
Noncurrent liabilities	(1.6)
Total fair value of liabilities assumed	(2.9)
Net assets acquired	6.5
Purchase price consideration	29.3
Goodwill	22.8
Heathland B.V. | Maximum
Business Acquisition [Line Items]
Consideration paid upon signing the agreement	6.8
Heathland B.V. | Customer Relationships
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Other intangible assets	5.1
Heathland B.V. | Trade Names
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Other intangible assets	0.9
Heathland B.V. | Developed Technology
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Other intangible assets	$ 0.2

XML

Acquisitions - Aristech (Details) - USD ($) $ in Millions		3 Months Ended	6 Months Ended		12 Months Ended
	Sep. 01, 2021	Jun. 30, 2022	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	May 03, 2021
Aristech Surfaces L L C
Business Acquisition [Line Items]
Equity interest acquired	100.00%
Purchase price consideration	$ 449.5
Changes to purchase price allocation		$ 0.0
PMMA Business
Business Acquisition [Line Items]
Equity interest acquired						100.00%
Purchase price consideration				$ 1,358.6	$ 1,364.9
Changes to purchase price allocation			$ 0.0

XML

Acquisitions - Pro Forma and transaction costs (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
Business Acquisition, Pro Forma Information [Abstract]
Net sales	$ 1,369.4	$ 2,563.6
Net income	185.5	261.1
Income from continuing operations	$ 166.9	$ 236.8

XML

Divestitures and Discontinued Operations (Details) - Emulsion Polymers, Synthetic Rubber - Disposal Group, Disposed of by Sale, Not Discontinued Operations $ in Millions	Dec. 01, 2021 USD ($)
Disclosures by disposal group
Consideration	$ 402.4
Pension and other postretirement benefits	41.6
Working capital target	$ 47.0

XML

Divestitures and Discontinued Operations - Results (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Gain on sale of businesses and other assets			$ (1.8)	$ (0.2)
Net income (loss) from discontinued operations	$ 0.3	$ 18.6		24.3
Emulsion Polymers, Synthetic Rubber | Discontinued Operations, Held-for-sale
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Net sales		135.7	0.1	259.9
Cost of sales	0.8	108.2	1.4	219.3
Gross profit (loss)	(0.8)	27.5	(1.3)	40.6
Selling, general and administrative expenses	(0.1)	5.6	(0.3)	11.8
Operating income (loss)	(0.7)	21.9	(1.0)	28.8
Gain on sale of businesses and other assets	1.2		1.2
Other expense, net		(0.8)		(1.0)
Income (loss) from discontinued operations before income taxes	0.5	21.1	0.2	27.8
Provision for income taxes	0.2	2.5	0.2	3.5
Net income (loss) from discontinued operations	0.3	$ 18.6		$ 24.3
Emulsion Polymers, Synthetic Rubber | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Net sales related to supply agreement	22.7		41.8
Cost of sales related to supply agreement	$ 15.6		$ 31.8

XML

Net Sales (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 1,425.5	$ 1,273.7	$ 2,812.2	$ 2,259.7
Engineered Materials
Disaggregation of Revenue [Line Items]
Net sales	353.7	311.2	596.5	246.8
Latex Binders
Disaggregation of Revenue [Line Items]
Net sales	301.3	181.0	660.4	562.2
Base Plastics
Disaggregation of Revenue [Line Items]
Net sales	361.9	396.9	758.4	725.8
Polystyrene
Disaggregation of Revenue [Line Items]
Net sales	312.0	313.3	630.0	580.1
Feedstocks
Disaggregation of Revenue [Line Items]
Net sales	96.6	71.3	166.9	144.8
United States
Disaggregation of Revenue [Line Items]
Net sales	363.9	209.9	672.9	353.9
United States | Engineered Materials
Disaggregation of Revenue [Line Items]
Net sales	102.5	74.1	289.1	71.1
United States | Latex Binders
Disaggregation of Revenue [Line Items]
Net sales	150.7	60.9	184.7	141.9
United States | Base Plastics
Disaggregation of Revenue [Line Items]
Net sales	106.1	71.6	190.6	134.2
United States | Feedstocks
Disaggregation of Revenue [Line Items]
Net sales	4.6	3.3	8.5	6.7
Europe
Disaggregation of Revenue [Line Items]
Net sales	784.7	762.4	1,581.9	1,318.3
Europe | Engineered Materials
Disaggregation of Revenue [Line Items]
Net sales	169.4	160.5	227.6	101.4
Europe | Latex Binders
Disaggregation of Revenue [Line Items]
Net sales	108.9	80.3	320.3	278.1
Europe | Base Plastics
Disaggregation of Revenue [Line Items]
Net sales	198.5	253.8	445.1	451.7
Europe | Polystyrene
Disaggregation of Revenue [Line Items]
Net sales	215.9	199.8	430.5	349.0
Europe | Feedstocks
Disaggregation of Revenue [Line Items]
Net sales	92.0	68.0	158.4	138.1
Asia-Pacific
Disaggregation of Revenue [Line Items]
Net sales	245.1	277.5	492.7	541.9
Asia-Pacific | Engineered Materials
Disaggregation of Revenue [Line Items]
Net sales	79.3	74.3	73.5	72.1
Asia-Pacific | Latex Binders
Disaggregation of Revenue [Line Items]
Net sales	38.2	37.8	151.0	138.1
Asia-Pacific | Base Plastics
Disaggregation of Revenue [Line Items]
Net sales	31.6	51.9	68.8	100.6
Asia-Pacific | Polystyrene
Disaggregation of Revenue [Line Items]
Net sales	96.0	113.5	199.4	231.1
Rest of World
Disaggregation of Revenue [Line Items]
Net sales	31.8	23.9	64.7	45.6
Rest of World | Engineered Materials
Disaggregation of Revenue [Line Items]
Net sales	2.5	2.3	6.3	2.2
Rest of World | Latex Binders
Disaggregation of Revenue [Line Items]
Net sales	3.5	2.0	4.4	4.1
Rest of World | Base Plastics
Disaggregation of Revenue [Line Items]
Net sales	25.7	$ 19.6	53.9	$ 39.3
Rest of World | Polystyrene
Disaggregation of Revenue [Line Items]
Net sales	$ 0.1		$ 0.1

XML

Investments in Unconsolidated Affiliates (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) item	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) item	Jun. 30, 2021 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of joint ventures | item	1		1
Summarized Financial Information, Net Income
Gross profit	$ 139.1	$ 220.0	$ 315.1	$ 408.9
Net income			54.2	223.1
AmSty
Summarized Financial Information, Net Income
Net sales	594.6	495.6	1,119.0	918.5
Gross profit	93.5	74.5	141.6	139.9
Net income	$ 80.1	$ 63.6	$ 116.2	$ 114.6

XML

Investments in Unconsolidated Affiliates - Americas Styrenics (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Investments in Unconsolidated Affiliates
Investments in unconsolidated affiliates	$ 271.4		$ 271.4		$ 247.8
AmSty
Investments in Unconsolidated Affiliates
Investments in unconsolidated affiliates	$ 271.4		$ 271.4		$ 247.8
Percentage of ownership underlying net assets	50.00%		50.00%		50.00%
Amortized weighted average remaining useful life			2.5
Dividends received from operating activities	$ 30.0	$ 25.0	$ 37.5	$ 40.0
Unconsolidated affiliates
Investments in Unconsolidated Affiliates
Investment in unconsolidated affiliates-difference between carrying amount and underlying equity	$ 12.3		$ 12.3		$ 9.4

XML

Inventories (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Inventories
Finished goods	$ 352.9	$ 279.2
Raw materials and semi-finished goods	370.1	303.9
Supplies	36.7	37.9
Total	$ 759.7	$ 621.0

XML

Debt - Schedule of Debt (Details) € in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Feb. 26, 2020 USD ($)	Feb. 26, 2020 EUR (€)	Sep. 01, 2017 USD ($)
Debt Instruments
Carrying amount	$ 2,360.5	$ 2,368.8
Unamortized deferred financing fees	(40.5)	(44.7)
Total Debt, Less Unamortized Deferred Financing Fees, Current and Noncurrent	2,320.0	2,324.1
Less: current portion	(17.7)	(18.5)
Total long-term debt, net of unamortized deferred financing fees	2,302.3	2,305.6
Term Loan B
Debt Instruments
Less: current portion	$ (14.5)
2024 Term Loan B
Debt Instruments
Interest rate at end of period (as a percent)	3.666%
Carrying amount	$ 666.9	670.4
Unamortized deferred financing fees	(6.6)	(8.0)
Total Debt, Less Unamortized Deferred Financing Fees, Current and Noncurrent	$ 660.3	662.4
2028 Term Loan B
Debt Instruments
Interest rate at end of period (as a percent)	4.166%
Carrying amount	$ 739.3	742.8
Unamortized deferred financing fees	(15.7)	(17.0)
Total Debt, Less Unamortized Deferred Financing Fees, Current and Noncurrent	723.6	725.8
2026 Revolving Facility
Debt Instruments
Funds available for borrowings	368.9
Letters of credit, amount outstanding	$ 6.1
Commitment fee (as a percent)	0.375%
Maximum borrowing capacity	$ 375.0
2029 Senior Notes
Debt Instruments
Interest rate	5.125%
Carrying amount	$ 450.0	450.0
Unamortized deferred financing fees	(13.8)	(14.7)
Total Debt, Less Unamortized Deferred Financing Fees, Current and Noncurrent	$ 436.2	435.3
2025 Senior Notes
Debt Instruments
Interest rate	5.375%		5.375%	5.375%	5.375%
Carrying amount	$ 500.0	500.0
Unamortized deferred financing fees	(4.4)	(5.0)
Total Debt, Less Unamortized Deferred Financing Fees, Current and Noncurrent	495.6	495.0	$ 500.0	€ 459.3	$ 500.0
Accounts Receivable Securitization Facility
Debt Instruments
Carrying amount	0.0	0.0
Unamortized deferred financing fees	0.0	0.0
Total Debt, Less Unamortized Deferred Financing Fees, Current and Noncurrent	0.0	0.0
Maximum borrowing capacity	150.0
Accounts receivable available to support facility	150.0
Other Indebtedness
Debt Instruments
Carrying amount	4.3	5.6
Total Debt, Less Unamortized Deferred Financing Fees, Current and Noncurrent	$ 4.3	$ 5.6

XML

Goodwill - Schedule of Carrying Amount of Goodwill (Details) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 710.1
Acquisition	22.8
Foreign currency impact	(23.5)
Ending Balance	709.4
Engineered Materials
Goodwill [Roll Forward]
Beginning Balance	667.3
Foreign currency impact	(17.6)
Ending Balance	649.7
Latex Binders
Goodwill [Roll Forward]
Beginning Balance	15.9
Foreign currency impact	(1.6)
Ending Balance	14.3
Base Plastics
Goodwill [Roll Forward]
Beginning Balance	22.4
Acquisition	22.8
Foreign currency impact	(3.8)
Ending Balance	41.4
Polystyrene
Goodwill [Roll Forward]
Beginning Balance	4.5
Foreign currency impact	(0.5)
Ending Balance	$ 4.0

XML

Derivative Instruments (Details) € in Millions, $ in Millions				6 Months Ended
	Apr. 07, 2022 USD ($)	Feb. 26, 2020 USD ($)	Sep. 01, 2017 USD ($)	Jun. 30, 2022 USD ($) item	Dec. 31, 2021 USD ($)	Feb. 26, 2020 EUR (€)	Sep. 01, 2017 EUR (€)
Derivative Instruments
Total debt				$ 2,320.0	$ 2,324.1
Foreign Exchange Forward Contracts
Derivative Instruments
Derivative term				2 months
Foreign Exchange Forward Contracts | Not Designated as Hedging Instruments
Derivative Instruments
Derivative contracts, notional amount				$ 689.6
Foreign Exchange Forward Contracts | Designated as Hedging Instrument
Derivative Instruments
Number of subsidiaries participating | item				1
Foreign Exchange Forward Contracts | Designated as Hedging Instrument | Cash Flow Hedges
Derivative Instruments
Amount hedged				$ 0.0
Cross Currency Swap
Derivative Instruments
Derivative contracts, notional amount | €							€ 420.0
Derivative term		2 years 8 months 12 days	5 years
Cross currency swap weighted average interest rate (as a percent)		3.672%	3.45%
Cash proceeds	$ 1.9
Interest Rate Swap
Derivative Instruments
Derivative contracts, notional amount				$ 200.0
Fixed interest rate per agreement (as a percent)				1.81%
LIBOR rate at end of period (as a percent)				1.67%
2025 Senior Notes
Derivative Instruments
Total debt		$ 500.0	$ 500.0	$ 495.6	495.0	€ 459.3
Interest rate		5.375%	5.375%	5.375%		5.375%	5.375%
2024 Term Loan B
Derivative Instruments
Total debt				$ 660.3	$ 662.4
2024 Term Loan B | LIBOR
Derivative Instruments
Debt instrument, margin rate				2.00%
Variable rate floor (as a percent)				0.00%
Euro | (Sell)
Derivative Instruments
Derivative contracts, notional amount				$ 564.7
Chinese Yuan | (Sell)
Derivative Instruments
Derivative contracts, notional amount				48.7
Swiss Franc | Buy
Derivative Instruments
Derivative contracts, notional amount				16.4
Taiwan, New Dollars | (Sell)
Derivative Instruments
Derivative contracts, notional amount				12.6
Mexico, Pesos | (Sell)
Derivative Instruments
Derivative contracts, notional amount				$ 12.4

XML

Derivative Instruments - Income Statements (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Cost of Sales	$ (1,286.4)	$ (1,053.7)	$ (2,497.1)	$ (1,850.8)
Interest expense, net	25.4	21.6	47.3	33.6
Gain (Loss) on Derivative Instruments, Net, Pretax		33.0		(22.0)
Other expense (income), net	(1.7)	6.1	1.3	8.5
Amount of gain (loss) recognized in income, not designated		33.0		(22.0)
Cost of Sales
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Cost of Sales	(1,286.4)	(1,053.7)	(2,497.1)	(1,850.8)
Interest Expense, Net
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Interest expense, net	(25.4)	(21.6)	(47.3)	(33.6)
Acquisition purchase price hedge gain (loss)
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Gain (Loss) on Derivative Instruments, Net, Pretax		33.0		(22.0)
Other expense, net
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Other expense (income), net	1.7	(6.1)	(1.3)	(8.5)
Foreign Exchange Forward Contracts | Not Designated as Hedging Instruments
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Amount of gain (loss) recognized in income, not designated			47.9	20.1
Foreign Exchange Forward Contracts | Not Designated as Hedging Instruments | Acquisition purchase price hedge gain (loss)
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Amount of gain (loss) recognized in income, not designated	(33.0)	33.0		(22.0)
Foreign Exchange Forward Contracts | Not Designated as Hedging Instruments | Other expense, net
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Amount of gain (loss) recognized in income, not designated	39.1	0.4
Foreign Exchange Forward Contracts | Designated as Hedging Instrument | Cost of Sales
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Cost of Sales				(0.3)
Foreign Exchange Forward Contracts | Designated as Hedging Instrument | Acquisition purchase price hedge gain (loss)
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Gain (Loss) on Derivative Instruments, Net, Pretax				(22.0)
Foreign Exchange Forward Contracts | Designated as Hedging Instrument | Other expense, net
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Other expense (income), net			47.9	20.1
Cross Currency Swap | Interest Expense, Net
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Interest expense, net			2.4	3.6
Amount of gain excluded from effectiveness testing	0.3	1.7
Interest Rate Swap | Interest Expense, Net
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Amount of gain (loss) reclassified from AOCI into income, interest rate cash flow hedges	$ (0.6)	$ (0.9)
Interest Rate Swap | Cash Flow Hedges | Interest Expense, Net
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Interest expense, net			$ (1.4)	$ (1.7)

XML

Derivative Instruments - Effect on AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivative Instruments
Gain (Loss) Recognized in AOCI, Cash flow hedges	$ 0.9	$ (0.2)	$ 2.4	$ 4.4
Gain (Loss) Recognized in AOCI, Net investment hedges	9.7	(7.1)	15.8	19.1
Cross Currency Swap
Derivative Instruments
Gain (Loss) Recognized in AOCI, Net investment hedges	$ 9.7	$ (7.1)	$ 15.8	$ 19.1

XML

Derivative Instruments - Gains and Losses in Other expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Amount of gain (loss) recognized in income, not designated		$ 33.0		$ (22.0)
Foreign exchange transaction gains (losses)			$ (48.0)	(19.3)
Derivative, Gain (Loss) on Derivative, Net, Total			(0.1)	0.8
Reclassification expected during next 12 months			0.2
Other expense, net
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Foreign exchange transaction gains (losses)	$ (37.8)	0.6
Derivative, Gain (Loss) on Derivative, Net, Total	1.3	1.0
Foreign Exchange Forward Contracts | Not Designated as Hedging Instruments
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Amount of gain (loss) recognized in income, not designated			$ 47.9	20.1
Foreign Exchange Forward Contracts | Not Designated as Hedging Instruments | Other expense, net
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Amount of gain (loss) recognized in income, not designated	39.1	0.4
Foreign Exchange Forward Contracts | Not Designated as Hedging Instruments | Acquisition purchase price hedge gain (loss)
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Amount of gain (loss) recognized in income, not designated	$ (33.0)	$ 33.0		$ (22.0)

XML

Derivative Instruments - Financial Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Derivatives, Financial Assets and Liabilities
Gross derivative asset position		$ 2.3
Counterparty netting, derivative assets		(0.1)
Net derivative asset position		2.2
Gross derivative liability position	$ (1.3)	(20.9)
Counterparty netting, derivative liabilities	0.6	0.1
Net derivative liability position	(0.7)	(20.8)
Total net derivative position	17.0	(18.6)
Accounts Receivable
Derivatives, Financial Assets and Liabilities
Gross derivative asset position	18.4	2.3
Counterparty netting, derivative assets	(0.7)
Net derivative asset position	17.7
Accounts Payable
Derivatives, Financial Assets and Liabilities
Liabilities at fair value	(1.3)
Gross derivative liability position		(20.9)
Foreign Exchange Forward Contracts | Not Designated as Hedging Instruments
Derivatives, Financial Assets and Liabilities
Gross derivative asset position		2.3
Counterparty netting, derivative assets		(0.1)
Net derivative asset position		2.2
Gross derivative liability position	(1.3)	(1.3)
Counterparty netting, derivative liabilities	0.6	0.1
Net derivative liability position	(0.7)	(1.2)
Total net derivative position	16.8	1.0
Foreign Exchange Forward Contracts | Not Designated as Hedging Instruments | Accounts Receivable
Derivatives, Financial Assets and Liabilities
Gross derivative asset position	18.2	2.3
Counterparty netting, derivative assets	(0.7)
Net derivative asset position	17.5
Foreign Exchange Forward Contracts | Not Designated as Hedging Instruments | Accounts Payable
Derivatives, Financial Assets and Liabilities
Liabilities at fair value	(1.3)
Gross derivative liability position		(1.3)
Interest Rate Swap
Derivatives, Financial Assets and Liabilities
Gross derivative liability position		(2.2)
Net derivative liability position		(2.2)
Total net derivative position	0.2	(2.2)
Interest Rate Swap | Accounts Receivable
Derivatives, Financial Assets and Liabilities
Gross derivative asset position	0.2
Net derivative asset position	$ 0.2
Interest Rate Swap | Accounts Payable
Derivatives, Financial Assets and Liabilities
Gross derivative liability position		(2.2)
Cross Currency Swap
Derivatives, Financial Assets and Liabilities
Gross derivative liability position		(17.4)
Net derivative liability position		(17.4)
Total net derivative position		(17.4)
Cross Currency Swap | Accounts Payable
Derivatives, Financial Assets and Liabilities
Gross derivative liability position		$ (17.4)

XML

Fair Value Measurements - Assets and Liabilities at Fair Value, Recurring (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Fair Value Measurements
Total net derivative position	$ 17.0	$ 17.0	$ (18.6)
Boehlen Location
Fair Value Measurements
Impairment loss on assets	1.3	2.0
Property Plant And Equipment At Fair Value | Boehlen Location
Fair Value Measurements
Assets at fair value, nonrecurring	3.1	3.1	3.4
Interest Rate Swap
Fair Value Measurements
Total net derivative position	0.2	0.2	(2.2)
Cross Currency Swap
Fair Value Measurements
Total net derivative position			(17.4)
Not Designated as Hedging Instruments | Foreign Exchange Forward Contracts
Fair Value Measurements
Total net derivative position	16.8	16.8	1.0
Recurring
Fair Value Measurements
Total net derivative position	17.0	17.0	(18.6)
Recurring | Interest Rate Swap
Fair Value Measurements
Liabilities at fair value			(2.2)
Recurring | Cross Currency Swap
Fair Value Measurements
Liabilities at fair value			(17.4)
Recurring | Level 2
Fair Value Measurements
Total net derivative position	17.0	17.0	(18.6)
Recurring | Level 2 | Interest Rate Swap
Fair Value Measurements
Liabilities at fair value			(2.2)
Recurring | Level 2 | Cross Currency Swap
Fair Value Measurements
Liabilities at fair value			(17.4)
Recurring | Not Designated as Hedging Instruments | Foreign Exchange Forward Contracts
Fair Value Measurements
Assets at fair value	17.5	17.5	2.2
Liabilities at fair value	(0.7)	(0.7)	(1.2)
Recurring | Not Designated as Hedging Instruments | Interest Rate Swap
Fair Value Measurements
Assets at fair value	0.2	0.2
Recurring | Not Designated as Hedging Instruments | Level 2 | Foreign Exchange Forward Contracts
Fair Value Measurements
Assets at fair value	17.5	17.5	2.2
Liabilities at fair value	(0.7)	(0.7)	(1.2)
Recurring | Not Designated as Hedging Instruments | Level 2 | Interest Rate Swap
Fair Value Measurements
Assets at fair value	$ 0.2	$ 0.2
Nonrecurring
Fair Value Measurements
Assets at fair value, nonrecurring			0.0
Liabilities at fair value, nonrecurring			$ 0.0

XML

Fair Value Measurements - Items not at Fair Value (Details) - Level 2 - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Fair Value of Debt Instruments
Total fair value of long term debt	$ 2,084.3	$ 2,374.5
2029 Senior Notes
Fair Value of Debt Instruments
Total fair value of long term debt	323.5	460.2
2028 Term Loan B
Fair Value of Debt Instruments
Total fair value of long term debt	700.1	737.4
2025 Senior Notes
Fair Value of Debt Instruments
Total fair value of long term debt	426.7	509.4
2024 Term Loan B
Fair Value of Debt Instruments
Total fair value of long term debt	$ 634.0	$ 667.5

XML

Provision For Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Provision For Income Taxes
Effective tax rate	45.40%	14.90%	49.70%	17.90%
Swiss tax reform	$ 15.3
Valuation allowance, provision against tax benefit expected to expire	8.5
Tax benefits	0.0		$ 0.0
Provision for income taxes	$ 30.8	$ 23.3	53.4	$ 43.4
Change in valuation allowances			$ 35.6

XML

Commitments and Contingencies (Details) $ in Millions	Jun. 30, 2022 USD ($) item	Dec. 31, 2021 USD ($)
Commitments and Contingencies.
Accrued obligations for environmental remediation and restoration costs | $	$ 3.8	$ 4.4
Environmental claims asserted | item	0

XML

Commitments and Contingencies - Purchase Commitments (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2022	Jun. 30, 2022
Loss Contingencies [Line Items]
European Commission investigation	$ 35.6	$ 35.6
Estimated Liability relating to European Commission Request for Information		$ 33.4
Maximum
Loss Contingencies [Line Items]
Purchase commitment period		5 years
Minimum
Loss Contingencies [Line Items]
Purchase commitment period		1 year

XML

Pension Plans and Other Postretirement Benefits - Net Periodic Benefit Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
U.S. Plans And Non-U.S. Plans
Net periodic benefit cost
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Amortization of Prior Service Cost (Credit), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Pension plans | Non-U.S. Plans
Net periodic benefit cost
Service cost	$ 3.1	$ 4.0	$ 6.3	$ 8.1
Interest cost	0.6	0.4	1.3	0.9
Expected return on plan assets		(0.1)	(0.1)	(0.1)
Amortization of prior service cost	(0.1)	(0.2)	(0.2)	(0.4)
Amortization of net (gain) loss	0.6	1.6	1.3	3.1
Net curtailment and settlement gain	(1.9)		(1.9)
Net periodic benefit cost	2.3	5.7	6.7	11.6
Pension plans | United States
Net periodic benefit cost
Service cost	0.3	0.1	0.5	0.1
Interest cost	0.1	0.1	0.3	0.1
Expected return on plan assets	(0.3)	(0.2)	(0.5)	$ (0.2)
Net periodic benefit cost	0.1		$ 0.3
Other Postretirement Benefit Plans | Maximum
Net periodic benefit cost
Net periodic benefit cost	$ 0.1	$ 0.1

XML

Pension Plans and Other Postretirement Benefits - Net Amounts Recognized (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Net amounts recognized in the balance sheets at December 31
Benefit obligations	$ 249.4	$ 249.4	$ 274.7
Cash contributions and benefit payments to unfunded plans	2.1	4.6
Additional cash contributions, including benefit payments to unfunded plans	$ 4.2	$ 4.2

XML

Share-Based Compensation - Summary of Expense (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	$ 3.8	$ 3.7	$ 12.2	$ 7.0
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	2.4	1.9	7.0	3.6
Unrecognized compensation cost	13.7		$ 13.7
Weighted-average period of recognition			1 year 10 months 24 days
Option Awards
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	0.7	1.1	$ 3.8	2.2
Unrecognized compensation cost, options	3.4		$ 3.4
Weighted-average period of recognition			1 year 7 months 6 days
Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	0.7	$ 0.7	$ 1.4	$ 1.2
Unrecognized compensation cost	$ 5.1		$ 5.1
Weighted-average period of recognition			2 years 2 months 12 days

XML

Share-Based Compensation - RSU Options and PSUs (Details)	6 Months Ended
	Jun. 30, 2022 $ / shares shares
Restricted Stock Units
Other-than-Options, Shares Activity
Granted, Shares | shares	196,071
Other-than-Options, FV Activity
Granted, Weighted-Average Grant Date Fair Value per Share	$ 52.31
Option Awards
Options Outstanding Roll Forward
Granted, Options | shares	192,175
Fair Value Assumptions
Expected term (in years)	5 years 6 months
Expected volatility	48.72%
Risk-free interest rate	1.97%
Dividend yield	2.00%
Options granted, Weighted average grant date fair value	$ 22.52
Performance Share Units
Fair Value Assumptions
Expected term (in years)	3 years
Expected volatility	57.30%
Risk-free interest rate	1.73%
Share Price	$ 58.64
Other-than-Options, Shares Activity
Granted, Shares | shares	63,317
Other-than-Options, FV Activity
Granted, Weighted-Average Grant Date Fair Value per Share	$ 57.47

XML

Segments - Reconciliation of Segment Reporting to Consolidated (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) segment	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment			6
Adjusted EBITDA	$ 186.1	$ 263.0	$ 390.6	$ 469.8
Equity in earnings of unconsolidated affiliates	39.4	30.1	61.0	53.0
Investment in unconsolidated affiliates	271.4		271.4		$ 247.8
Capital expenditures			55.4	30.0
Engineered Materials
Segment Reporting Information [Line Items]
Adjusted EBITDA	34.0	27.8	68.7	35.8
Latex Binders
Segment Reporting Information [Line Items]
Adjusted EBITDA	29.4	32.2	59.6	49.0
Base Plastics
Segment Reporting Information [Line Items]
Adjusted EBITDA	46.1	82.0	114.7	147.5
Polystyrene
Segment Reporting Information [Line Items]
Adjusted EBITDA	23.0	51.1	68.3	98.4
Feedstocks
Segment Reporting Information [Line Items]
Adjusted EBITDA	14.2	39.8	18.3	86.1
Americas Styrenics [Member]
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 39.4	$ 30.1	$ 61.0	$ 53.0
AmSty
Segment Reporting Information [Line Items]
Percentage of ownership underlying net assets	50.00%		50.00%		50.00%
Investment in unconsolidated affiliates	$ 271.4		$ 271.4		$ 247.8
AmSty | Americas Styrenics [Member]
Segment Reporting Information [Line Items]
Percentage of ownership underlying net assets	50.00%		50.00%

XML

Segments - Reconciliation of Net Income to Segment Adjusted EBITDA (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Income from continuing operations before income taxes	$ 67.9	$ 156.3	$ 107.6	$ 242.2
Interest expense, net	(25.4)	(21.6)	(47.3)	(33.6)
Depreciation and amortization	48.1	38.1	101.1	61.2
Corporate Unallocated	21.6	23.9	48.5	46.4
Adjusted EBITDA addbacks	23.1	23.1	86.1	86.4
Adjusted EBITDA	186.1	263.0	390.6	469.8
Net gain on disposition of businesses and assets	(1.5)		(1.8)	(0.2)
Restructuring and other charges	(1.5)	6.3	(1.0)	6.7
Acquisition transactions and integration net costs (benefit)	2.7	43.2	5.9	49.2
Acquisition purchase price hedge loss (gain)		(33.0)		22.0
Asset impairment charges or write-offs	1.3	1.8	2.0	1.8
European Commission Request for Information (Note 13)			35.6
Other items	22.1	4.8	45.4	6.9
Corporate Unallocated
Segment Reporting Information [Line Items]
Interest expense, net	$ 25.4	$ 21.6	$ 47.3	$ 33.6

XML

Restructuring (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ (1.5)	$ 5.9	$ (1.0)	$ 6.3
Restructuring Reserve [Roll Forward]
Accrued charges/Balance at beginning of period			10.0
Expenses			(1.3)
Deductions			(3.3)
Accrued charges/Balance at end of period	5.4		5.4
Transformational Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	(0.2)	6.2	0.1	6.2
Cumulative life-to-date charges	8.8		8.8
Other Restructurings
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	(1.3)	(0.3)	(1.1)	0.1
Employee termination benefits
Restructuring Reserve [Roll Forward]
Accrued charges/Balance at beginning of period			10.0
Expenses			(1.4)
Deductions			(3.2)
Accrued charges/Balance at end of period	5.4		5.4
Employee termination benefits | Transformational Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	(0.2)	$ 6.2	0.1	$ 6.2
Cumulative life-to-date charges	8.8		8.8
Employee termination benefits | Transformational Restructuring Program | Maximum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	$ 1.0		1.0
Decommissioning and other
Restructuring Reserve [Roll Forward]
Expenses			0.1
Deductions			$ (0.1)

XML

Accumulated Other Comprehensive Income (Loss) - Components (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	$ 972.8	$ 676.3	$ 1,013.1	$ 590.3
Balance at end of period	924.6	829.8	924.6	829.8
Cumulative Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(118.6)	(108.6)	(114.3)	(109.0)
Other comprehensive income (loss)	(34.8)	(0.7)	(39.1)	(0.3)
Balance at end of period	(153.4)	(109.3)	(153.4)	(109.3)
Pension & Other Postretirement Benefit Plans, Net
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(33.3)	(70.8)	(33.6)	(71.9)
Other comprehensive income (loss)	7.7		7.7
Amounts reclassified from AOCI to net income	(1.4)	1.0	(1.1)	2.1
Balance at end of period	(27.0)	(69.8)	(27.0)	(69.8)
Cash Flow Hedges, Net
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	2.2	(0.6)	0.7	(5.2)
Other comprehensive income (loss)		(1.1)	0.7	2.4
Amounts reclassified from AOCI to net income	0.3	0.9	1.1	2.0
Balance at end of period	2.5	(0.8)	2.5	(0.8)
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(149.7)	(180.0)	(147.2)	(186.1)
Other comprehensive income (loss)	(27.1)	(1.8)	(30.7)	2.1
Amounts reclassified from AOCI to net income	(1.1)	1.9		4.1
Balance at end of period	$ (177.9)	$ (179.9)	$ (177.9)	$ (179.9)

XML

Accumulated Other Comprehensive Income (Loss) - Reclassification (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	$ 1,286.4		$ 1,053.7		$ 2,497.1	$ 1,850.8
Interest expense, net	25.4		21.6		47.3	33.6
Income before income taxes	(67.9)		(156.3)		(107.6)	(242.2)
Provision for income taxes	30.8		23.3		53.4	43.4
Net income	(37.4)	$ (16.7)	(151.6)	$ (71.5)	(54.2)	(223.1)
Reclassified from AOCI to net income (loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net curtailment and settlement gain	(1.9)				(1.9)
Pension & Other Postretirement Benefit Plans, Net | Reclassified from AOCI to net income (loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	(1.4)		1.5		(0.9)	3.1
Provision for income taxes			(0.5)		(0.2)	(1.0)
Net income	(1.4)		1.0		(1.1)	2.1
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] | Reclassified from AOCI to net income (loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Prior service credit	(0.1)		(0.2)		(0.2)	(0.5)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] | Reclassified from AOCI to net income (loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net actuarial loss	0.6		1.7		1.2	3.6
Cash Flow Hedges, Net | Reclassified from AOCI to net income (loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales						0.3
Interest expense, net	0.6		0.9		1.4	1.7
Income before income taxes	0.6		0.9		1.4	2.0
Provision for income taxes	(0.3)				(0.3)
Net income	$ 0.3		$ 0.9		$ 1.1	$ 2.0

XML

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings:
Net income from continuing operations	$ 37.1		$ 133.0		$ 54.2	$ 198.8
Net income from discontinued operations, net of income taxes	0.3		18.6			24.3
Net income	$ 37.4	$ 16.7	$ 151.6	$ 71.5	$ 54.2	$ 223.1
Shares:
Weighted average ordinary shares outstanding	36.3		38.8		36.8	38.6
Dilutive effect of RSUs, option awards and PSUs	0.7		0.8		0.8	1.0
Diluted weighted average ordinary shares outstanding	37.0		39.6		37.6	39.6
Income (loss) per share
Income (loss) per share-basic, Continuing operations	$ 1.02		$ 3.43		$ 1.47	$ 5.15
Income (loss) per share-basic, Discontinued operations	0.01		0.48			0.62
Income per share-basic	1.03		3.91		1.47	5.77
Income (loss) per share-diluted, Continuing operations	1.00		3.35		1.44	5.02
Income (loss) per share-diluted, Discontinued operations	0.01		0.47			0.61
Income per share- diluted	$ 1.01		$ 3.82		$ 1.44	$ 5.63
Anti-dilutive shares excluded	1.0		0.6		0.9	0.6

XML

Other Charges (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Other Charges
Asset impairmentsimpairment charges or write-offs (Note 11)	$ 1.3		$ 1.8	$ 2.0	$ 1.8
European Commission Request for Information (Note 13)		$ 35.6		35.6
Total	$ 1.3		$ 1.8	$ 37.6	$ 1.8

XML

Label	Element	Value
Foreign Exchange Forward Contracts
Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent	us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	$ (1,000,000.0)
Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent	us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	2,700,000
Interest Rate Swap
Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent	us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	800,000
Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent	us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	1,700,000
Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent	us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	900,000
Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent	us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	$ 2,400,000