Form 10-Q - Quarterly report [Sections 13 or 15(d)]

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

____________________________________________________________________

FORM 10-Q

_____________________________________________________________________


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

For the quarterly period ended March 31, 2025


☐			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: 001-35243

_____________________________________________________________________

SUNCOKE ENERGY, INC.

(Exact name of registrant as specified in its charter)

______________________________________________________________________


Delaware						90-0640593
(State or other jurisdiction of incorporation or organization)						(I.R.S. Employer Identification No.)

1011 Warrenville Road, Suite 600

Lisle, Illinois 60532

(Address of principal executive offices, including zip code)

(630) 824-1000

(Registrant’s telephone number, including area code)

____________________________________________________________

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common Stock, par value $0.01 per share

SXC

New York Stock Exchange

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. ý 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). ý 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 ý No

As of April 25, 2025, there were 84,651,097 shares of the Registrant’s Common Stock, par value $0.01 per share outstanding.

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SUNCOKE ENERGY, INC.

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PART I – FINANCIAL INFORMATION

Item 1. Consolidated Financial Statements			1

Consolidated Statements of Income (Unaudited) For the Three Months Ended March 31, 2025 and 2024			1

Consolidated Statements of Comprehensive Income (Unaudited) For the Three Months Ended March 31, 2025 and 2024			2

Consolidated Balance Sheets at March 31, 2025 (Unaudited) and December 31, 2024			3

Consolidated Statements of Cash Flows (Unaudited) For the Three Months Ended March 31, 2025 and 2024			4

Consolidated Statements of Equity (Unaudited) For the Three Months Ended March 31, 2025 and 2024			5

Notes to the Consolidated Financial Statements			6

1. General			6

2. Inventories			6

3. Intangible Assets			7

4. Income Taxes			7

5. Accrued Liabilities			7

6. Debt			8

7. Commitments and Contingent Liabilities			8

8. Share-Based Compensation			8

9. Earnings per Share			10

10. Fair Value Measurement			10

11. Revenue from Contracts with Customers			11

12. Business Segment Information			12





Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations			16

Item 3. Quantitative and Qualitative Disclosures about Market Risk			23

Item 4. Controls and Procedures			23

PART II – OTHER INFORMATION

Item 1. Legal Proceedings			24

Item 1A. Risk Factors			24

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds			24

Item 3. Defaults Upon Senior Securities			24

Item 4. Mine Safety Disclosures			24

Item 5. Other Information			24

Item 6. Exhibits			25

Signatures			26

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CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS

We have made forward-looking statements in this Quarterly Report on Form 10-Q, including, among others, in the sections entitled “Risk Factors,” “Quantitative and Qualitative Disclosures About Market Risk” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” We intend such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Forward-looking statements include all statements that are not historical facts and may be identified by the use of forward-looking terminology such as the words “believe,” “expect,” “plan,” “intend,” “anticipate,” “estimate,” “predict,” “potential,” “continue,” “may,” “will,” “should” or the negative of these terms or similar expressions. Such forward-looking statements are based on management’s beliefs, expectations and assumptions based upon information currently available, and include, but are not limited to, statements concerning our possible or assumed future results of operations, business strategies, financing plans, competitive position, potential growth opportunities (including, among other things, continued expansion into the foundry coke market), the influence of competition, and the effects of future legislation or regulations. In addition, statements in this Quarterly Report on Form 10-Q concerning future dividend declarations are subject to approval by our Board of Directors and will be based upon circumstances then existing. Forward-looking statements are not guarantees of future performance, but are based upon the current knowledge, beliefs and expectations of SunCoke management, and upon assumptions by SunCoke concerning future conditions, any or all of which ultimately may prove to be inaccurate.

Forward-looking statements involve risks, uncertainties and assumptions. Actual results may differ materially from those expressed in these forward-looking statements. You should not put undue reliance on any forward-looking statements. The forward-looking statements made in this Quarterly Report on Form 10-Q should not be construed by you to be exhaustive and speak only as of the date of this report. We do not have any intention or obligation to update any forward-looking statement (or its associated cautionary language), whether as a result of new information or future events, after the date of this Quarterly Report on Form 10-Q, except as required by applicable law. If we update one or more forward-looking statements, no inference should be drawn that we will make additional updates with respect to those or other forward-looking statements.

The risk factors discussed in “Risk Factors” in our Annual Report on Form 10-K and this Quarterly Report on Form 10-Q could cause our results to differ materially from those expressed in the forward-looking statements made in this Quarterly Report on Form 10-Q. There also may be other risks that are currently unknown to us or that we are unable to predict at this time. Such risks and uncertainties include, without limitation:

•actual or potential impacts of international conflicts and humanitarian crises on global commodity prices, inflationary pressures, and state sponsored cyber activity;

•the effect of inflation on wages and operating expenses;

•the effect of restrictive trade regulations on our major customers, business partners and/or suppliers;

•volatility and cyclical downturns in the steel industry and in other industries in which our customers and/or suppliers operate;

•changes in the marketplace that may affect our cokemaking business, including the supply and demand for our coke products, as well as increased imports of coke from foreign producers;

•volatility, cyclical downturns and other change in the business climate and market for coal, affecting customers or potential customers for our logistics business;

•changes in the marketplace that may affect our logistics business, including the supply and demand for thermal and metallurgical coal;

•severe financial hardship or bankruptcy of one or more of our major customers, or the occurrence of a customer default or other event affecting our ability to collect payments from our customers;

•our ability to repair aging coke ovens to maintain operational performance;

•age of, and changes in the reliability, efficiency and capacity of the various equipment and operating facilities used in our cokemaking operations, and in the operations of our subsidiaries major customers, business partners and/or suppliers;

•changes in the expected operating levels of our assets;

•changes in the level of capital expenditures or operating expenses, including any changes in the level of environmental capital, operating or remediation expenditures;

•changes in levels of production, production capacity, pricing and/or margins for coal and coke;

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•changes in product specifications for the coke that we produce or the coals we mix, store and transport;

•our ability to meet minimum volume requirements, coal-to-coke yield standards and coke quality standards in our coke sales agreements;

•variation in availability, quality and supply of metallurgical coal used in the cokemaking process, including as a result of non-performance by our suppliers;

•effects of geologic conditions, weather, natural disasters and other inherent risks beyond our control;

•effects of adverse events relating to the operation of our facilities and to the transportation and storage of hazardous materials or regulated media (including equipment malfunction, explosions, fires, spills, impoundment failure and the effects of severe weather conditions);

•the existence of hazardous substances or other environmental contamination on property owned or used by us;

•required permits and other regulatory approvals and compliance with contractual obligations and/or bonding requirements in connection with our cokemaking, logistics operations, and/or former coal mining activities;

•the availability of future permits authorizing the disposition of certain mining waste and the management of reclamation areas;

•risks related to environmental compliance;

•our ability to comply with applicable federal, state or local laws and regulations, including, but not limited to, those relating to environmental matters;

•risks related to labor relations and workplace safety;

•availability of skilled employees for our cokemaking, and/or logistics operations, and other workplace factors;

•our ability to service our outstanding indebtedness;

•our indebtedness and certain covenants in our debt documents;

•our ability to comply with the covenants and restrictions imposed by our financing arrangements;

•changes in the availability and cost of equity and debt financing;

•impacts on our liquidity and ability to raise capital as a result of changes in the credit ratings assigned to our indebtedness;

•competition from alternative steelmaking and other technologies that have the potential to reduce or eliminate the use of coke;

•our dependence on, relationships with, and other conditions affecting our customers and/or suppliers;

•consolidation of major customers;

•nonperformance or force majeure by, or disputes with, or changes in contract terms with, major customers, suppliers, dealers, distributors or other business partners;

•effects of adverse events relating to the business or commercial operations of our customers and/or suppliers;

•changes in credit terms required by our suppliers;

•our ability to secure new coal supply agreements or to renew existing coal supply agreements;

•effects of railroad, barge, truck and other transportation performance and costs, including any transportation disruptions;

•our ability to enter into new, or renew existing, long-term agreements upon favorable terms for the sale of coke, steam, or electric power, or for handling services of coal and other products (including transportation, storage and mixing);

•our ability to enter into new, or renew existing, agreements upon favorable terms for logistics services;

•our ability to successfully implement domestic and/or international growth strategies;

•our ability to identify acquisitions, execute them under favorable terms, and integrate them into our existing business operations;

•our ability to realize expected benefits from investments and acquisitions;

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•our ability to enter into joint ventures and other similar arrangements under favorable terms;

•our ability to consummate assets sales, other divestitures and strategic restructuring in a timely manner upon favorable terms, and/or realize the anticipated benefits from such actions;

•our ability to consummate investments under favorable terms, including with respect to existing cokemaking facilities, which may utilize by-product technology, and integrate them into our existing businesses and have them perform at anticipated levels;

•our ability to develop, design, permit, construct, start up, or operate new cokemaking facilities in the U.S. or in foreign countries;

•disruption in our information technology infrastructure and/or loss of our ability to securely store, maintain, or transmit data due to security breach by hackers, employee error or malfeasance, terrorist attack, power loss, telecommunications failure or other events;

•the accuracy of our estimates of reclamation and other environmental obligations;

•risks related to obligations under mineral leases retained by us in connection with the divestment of our legacy coal mining business;

•risks related to the ability of the assignee(s) to perform in compliance with applicable requirements under mineral leases assigned in connection with the divestment of our legacy coal mining business;

•proposed or final changes in existing, or new, statutes, regulations, rules, governmental policies and taxes, or their interpretations, including those relating to environmental matters and taxes;

•proposed or final changes in accounting and/or tax methodologies, laws, regulations, rules, or policies, or their interpretations, including those affecting inventories, leases, post-employment benefits, income, or other matters;

•changes in federal, state, or local tax laws or regulations, including the interpretations thereof;

•claims of noncompliance with any statutory or regulatory requirements;

•changes in insurance markets impacting cost, level and/or types of coverage available, and the financial ability of our insurers to meet their obligations;

•inadequate protection of our intellectual property rights;

•volatility in foreign currency exchange rates affecting the markets and geographic regions in which we conduct business; and

•historical consolidated financial data may not be reliable indicators of future results.

The factors identified above are believed to be important factors, but not necessarily all of the important factors, that could cause actual results to differ materially from those expressed in any forward-looking statement made by us. Other factors not discussed herein also could have material adverse effects on us. All forward-looking statements included in this Quarterly Report on Form 10-Q are expressly qualified in their entirety by the foregoing cautionary statements.

In addition, our discussion of certain environmental, social and governance (“ESG”) assessments and related issues in this or other disclosures, including on our corporate website, is informed by various ESG standards and frameworks (including standards for the measurement of underlying data) and the interests of various stakeholders. As such, such information may not be, and should not be interpreted as necessarily being, “material” under the federal securities laws for Securities and Exchange Commission (“SEC”) reporting purposes. Furthermore, much of this information is subject to assumptions, methodologies, or third-party information that is still evolving and subject to repeated change. Our disclosures may change as a result of changes in frameworks, availability or quality of information, changes in business or government policy, or other factors, which may be out of our control.

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PART I – FINANCIAL INFORMATION

Item 1. Consolidated Financial Statements

SunCoke Energy, Inc.

Consolidated Statements of Income

(Unaudited)


	Three Months Ended March 31,
	2025		2024

	(Dollars and shares in millions, except per share amounts)
Revenues
Sales and other operating revenue	$	436.0	$	488.4
Costs and operating expenses
Cost of products sold and operating expenses	362.3		402.2
Selling, general and administrative expenses	14.7		18.4
Depreciation and amortization expense	28.8		33.3
Total costs and operating expenses	405.8		453.9
Operating income	30.2		34.5
Interest expense, net	5.2		6.3
Income before income tax expense	25.0		28.2
Income tax expense	5.6		7.1
Net income	19.4		21.1
Less: Net income attributable to noncontrolling interests	2.1		1.1
Net income attributable to SunCoke Energy, Inc.	$	17.3	$	20.0
Earnings attributable to SunCoke Energy, Inc. per common share:
Basic	$	0.20	$	0.24
Diluted	$	0.20	$	0.23
Weighted average number of common shares outstanding:
Basic	85.5		85.0
Diluted	85.6		85.3

(See accompanying notes to the consolidated financial statements)

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SunCoke Energy, Inc.

Consolidated Statements of Comprehensive Income

(Unaudited)


	Three Months Ended March 31,
	2025		2024

	(Dollars in millions)
Net income	$	19.4	$	21.1
Other comprehensive income (loss):
Reclassification of prior service benefit and actuarial loss amortization to earnings, net of tax	(0.1)		0.1
Currency translation adjustment	0.3		(0.2)
Comprehensive income	19.6		21.0
Less: Comprehensive income attributable to noncontrolling interests	2.1		1.1
Comprehensive income attributable to SunCoke Energy, Inc.	$	17.5	$	19.9

(See accompanying notes to the consolidated financial statements)

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SunCoke Energy, Inc.

Consolidated Balance Sheets


	March 31, 2025		December 31, 2024
	(Unaudited)
	(Dollars in millions, except par value amounts)
Assets
Cash and cash equivalents	$	193.7	$	189.6
Receivables, net	80.7		96.6
Inventories	209.7		180.8

Other current assets	11.7		7.6
Total current assets	495.8		474.6
Properties, plants and equipment (net of accumulated depreciation of $1,526.0 million and $1,497.6 million at March 31, 2025 and December 31, 2024, respectively)	1,122.6		1,143.6
Intangible assets, net	28.9		29.2
Deferred charges and other assets	21.1		20.8
Total assets	$	1,668.4	$	1,668.2
Liabilities and Equity
Accounts payable	$	152.7	$	153.2
Accrued liabilities	35.6		51.6
Interest payable	6.1		—
Income tax payable	11.9		1.0
Total current liabilities	206.3		205.8
Long-term debt	492.9		492.3
Accrual for black lung benefits	12.7		12.7
Retirement benefit liabilities	7.2		7.6
Deferred income taxes	194.6		196.8
Asset retirement obligations	17.5		17.2
Other deferred credits and liabilities	22.7		24.8
Total liabilities	953.9		957.2
Equity
Preferred stock, $0.01 par value. Authorized 50,000,000 shares; no issued shares at both March 31, 2025 and December 31, 2024	—		—
Common stock, $0.01 par value. Authorized 300,000,000 shares; issued 100,055,579 and 99,756,420 shares at March 31, 2025 and December 31, 2024, respectively	1.0		1.0
Treasury stock, 15,404,482 shares at both March 31, 2025 and December 31, 2024	(184.0)		(184.0)
Additional paid-in capital	730.2		732.8
Accumulated other comprehensive loss	(7.5)		(7.7)
Retained earnings	144.9		138.1
Total SunCoke Energy, Inc. stockholders’ equity	684.6		680.2
Noncontrolling interest	29.9		30.8
Total equity	714.5		711.0
Total liabilities and equity	$	1,668.4	$	1,668.2

(See accompanying notes to the consolidated financial statements)

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SunCoke Energy, Inc.

Consolidated Statements of Cash Flows

(Unaudited)


	Three Months Ended March 31,
	2025		2024

	(Dollars in millions)
Cash Flows from Operating Activities
Net income	$	19.4	$	21.1
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	28.8		33.3
Deferred income tax (benefit) expense	(2.2)		0.4
Share-based compensation expense	0.4		1.3
Changes in working capital pertaining to operating activities:
Receivables, net	15.9		(23.0)
Inventories	(28.9)		(5.6)
Accounts payable	(3.3)		(8.1)
Accrued liabilities	(11.8)		(12.0)
Interest payable	6.1		6.1
Income taxes	10.9		5.9
Other operating activities	(9.5)		(9.4)
Net cash provided by operating activities	25.8		10.0
Cash Flows from Investing Activities
Capital expenditures	(4.9)		(15.5)
Other investing activities	0.3		0.4
Net cash used in investing activities	(4.6)		(15.1)
Cash Flows from Financing Activities


Proceeds from revolving facility	—		11.0
Repayment of revolving facility	—		(11.0)

Dividends paid	(10.9)		(9.0)
Cash distribution to noncontrolling interests	(3.0)		(2.2)
Other financing activities	(3.2)		(3.7)
Net cash used in financing activities	(17.1)		(14.9)
Net increase (decrease) in cash and cash equivalents	4.1		(20.0)
Cash and cash equivalents at beginning of period	189.6		140.1
Cash and cash equivalents at end of period	$	193.7	$	120.1
Supplemental Disclosure of Cash Flow Information
Interest paid	$	—	$	—
Income taxes paid, net of refunds of $3.8 million and zero, respectively	$	(3.2)	$	0.7

(See accompanying notes to the consolidated financial statements)

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SunCoke Energy, Inc.

Consolidated Statements of Equity

Three Months Ended March 31, 2025

(Unaudited)


	Common Stock			Treasury Stock			Additional Paid-In Capital		Accumulated Other Comprehensive Loss		Retained Earnings		Total SunCoke Energy, Inc. Equity		Non-controlling Interests		Total Equity
	Shares	Amount		Shares	Amount

	(Dollars in millions)
At December 31, 2024	99,756,420	$	1.0	15,404,482	$	(184.0)	$	732.8	$	(7.7)	$	138.1	$	680.2	$	30.8	$	711.0
Net income	—	—		—	—		—		—		17.3		17.3		2.1		19.4
Reclassification of prior service benefit and actuarial loss amortization to earnings, net of tax	—	—		—	—		—		(0.1)		—		(0.1)		—		(0.1)
Currency translation adjustment	—	—		—	—		—		0.3		—		0.3		—		0.3
Share-based compensation	—	—		—	—		0.4		—		—		0.4		—		0.4
Share issuances, net of shares withheld for taxes	299,159	—		—	—		(3.0)		—		—		(3.0)		—		(3.0)
Dividends	—	—		—	—		—		—		(10.5)		(10.5)		—		(10.5)
Cash distribution to noncontrolling interests	—	—		—	—		—		—		—		—		(3.0)		(3.0)
At March 31, 2025	100,055,579	$	1.0	15,404,482	$	(184.0)	$	730.2	$	(7.5)	$	144.9	$	684.6	$	29.9	$	714.5

SunCoke Energy, Inc.

Consolidated Statements of Equity

Three Months Ended March 31, 2024

(Unaudited)


	Common Stock			Treasury Stock			Additional Paid-In Capital		Accumulated Other Comprehensive Loss		Retained Earnings		Total SunCoke Energy, Inc. Equity		Non-controlling Interests		Total Equity
	Shares	Amount		Shares	Amount

	(Dollars in millions)
At December 31, 2023	99,161,446	$	1.0	15,404,482	$	(184.0)	$	729.8	$	(12.8)	$	80.2	$	614.2	$	31.3	$	645.5
Net income	—	—		—	—		—		—		20.0		20.0		1.1		21.1
Reclassifications of prior service benefit and actuarial loss amortization to earnings, net of tax	—	—		—	—		—		0.1		—		0.1		—		0.1
Currency translation adjustment	—	—		—	—		—		(0.2)		—		(0.2)		—		(0.2)
Share-based compensation	—	—		—	—		1.3		—		—		1.3		—		1.3
Share issuances, net of shares withheld for taxes	318,520	—		—	—		(3.6)		—		—		(3.6)		—		(3.6)
Dividends	—	—		—	—		—		—		(8.8)		(8.8)		—		(8.8)
Cash distribution to noncontrolling interests	—	—		—	—		—		—		—		—		(2.2)		(2.2)
At March 31, 2024	99,479,966	$	1.0	15,404,482	$	(184.0)	$	727.5	$	(12.9)	$	91.4	$	623.0	$	30.2	$	653.2

(See accompanying notes to the consolidated financial statements)

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SunCoke Energy, Inc.

Notes to the Consolidated Financial Statements

1. General

Description of Business

SunCoke Energy, Inc. (“SunCoke Energy,” “SunCoke,” “Company,” “we,” “our” and “us”) is the largest independent producer of high-quality coke in the Americas, as measured by tons of coke produced each year, and has more than 60 years of coke production experience. Coke is produced by heating metallurgical coal in a refractory oven, which releases certain volatile components from the coal, thus transforming the coal into coke. Our coke is primarily used as a principal raw material in the blast furnace steelmaking process as well as in the foundry production of casted iron, and the majority of our sales are derived from blast furnace coke sales made under long-term, take-or-pay agreements. We also sell coke produced utilizing capacity in excess of that reserved for our long-term, take-or-pay agreements to customers in both the export and North American domestic coke markets seeking high-quality product for their blast furnaces. We have designed, developed and built, and we currently own and operate, five cokemaking facilities in the United States (“U.S.”) with collective nameplate capacity to produce approximately 4.2 million tons of blast furnace coke per year. Additionally, we designed and currently operate one cokemaking facility in Brazil under licensing and operating agreements on behalf of ArcelorMittal Brasil S.A. (“ArcelorMittal Brazil”), which has approximately 1.7 million tons of annual cokemaking capacity. Our cokemaking ovens utilize efficient, modern heat recovery technology designed to combust the coal’s volatile components liberated during the cokemaking process and use the resulting heat to create steam or electricity for sale.

We also own and operate a logistics business that provides export and domestic material handling and/or mixing services to steel, coke (including some of our domestic cokemaking facilities), electric utility, coal producing and other manufacturing based customers. Our logistics terminals, which are strategically located to reach Gulf Coast, East Coast, Great Lakes and international ports, have the collective capacity to mix and/or transload more than 40 million tons of coal and other products annually and have storage capacity of approximately 3 million tons.

Basis of Presentation

The accompanying unaudited consolidated financial statements included herein have been prepared in accordance with accounting principles generally accepted in the U.S. (“GAAP”) for interim reporting. Certain information and disclosures normally included in financial statements have been omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). In management’s opinion, the financial statements reflect all adjustments, which are of a normal recurring nature, necessary for a fair presentation of the results of operations, financial position and cash flows for the periods presented. The results of operations for the period ended March 31, 2025 are not necessarily indicative of the operating results expected for the entire year. These unaudited interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2024.

2. Inventories

The components of inventories were as follows:


	March 31, 2025		December 31, 2024

	(Dollars in millions)
Coal	$	136.4	$	109.3
Coke	15.6		13.9
Materials, supplies and other	57.7		57.6
Total inventories	$	209.7	$	180.8

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3. Intangible Assets

Intangible assets, net, include Goodwill allocated to our Domestic Coke segment of $3.4 million at both March 31, 2025 and December 31, 2024, and other intangibles detailed in the table below, excluding fully amortized intangible assets.


		March 31, 2025						December 31, 2024
	Weighted - Average Remaining Amortization Years	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net

		(Dollars in millions)
Permits	17	31.7		7.6		24.1		31.7		7.3		24.4
Other	25	1.6		0.2		1.4		1.6		0.2		1.4
Total		$	33.3	$	7.8	$	25.5	$	33.3	$	7.5	$	25.8

Total amortization expense for intangible assets subject to amortization was $0.3 million and $0.5 million for the three months ended March 31, 2025 and 2024, respectively.

4. Income Taxes

At the end of each interim period, we make our best estimate of the annual effective tax rate and the impact of discrete items, if any, and adjust the rate as necessary.


	Three Months Ended March 31,
	2025			2024

	(Dollars in millions)
Income before income tax expense	$	25.0		$	28.2
Income tax expense	5.6			7.1
Effective tax rate	22.4		%	25.2		%

Income taxes recorded during the three months ended March 31, 2025 and 2024 included immaterial discrete items.

The Company's effective tax rate was 22.4 percent and 25.2 percent for the three months ended March 31, 2025 and 2024, respectively. The difference between the Company's effective tax rates and federal statutory rate of 21.0 percent during all periods presented reflect the impact of state taxes, valuation allowances established on unused foreign tax credits projected for the current period, compensation deduction limitations under Section 162(m) of the Internal Revenue Code and earnings attributable to its noncontrolling ownership interests in a partnership.

5. Accrued Liabilities

Accrued liabilities consisted of the following:


	March 31, 2025		December 31, 2024

	(Dollars in millions)
Accrued benefits	$	12.6	$	28.7
Current portion of postretirement benefit obligation	1.0		1.0
Other taxes payable	12.7		10.2
Current portion of black lung liability	1.1		1.0
Lease liabilities	2.8		2.7
Other	5.4		8.0
Total accrued liabilities	$	35.6	$	51.6

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6. Debt

Total debt consisted of the following:


	March 31, 2025		December 31, 2024

	(Dollars in millions)
4.875 percent senior notes, due 2029 (“2029 Senior Notes”)	$	500.0	$	500.0
$350.0 revolving credit facility, due 2026 (“Revolving Facility”)	—		—
Total borrowings	$	500.0	$	500.0
Debt issuance costs	(7.1)		(7.7)
Total debt	$	492.9	$	492.3

Revolving Facility

As of March 31, 2025, the Revolving Facility had no outstanding balance, leaving $350.0 million available. Additionally, the Company has certain letters of credit totaling $9.6 million, which do not reduce the Revolving Facility's available balance.

Covenants

Under the terms of the Revolving Facility, the Company is subject to a maximum consolidated net leverage ratio of 4.50:1.00 and a minimum consolidated interest coverage ratio of 2.50:1.00. The Company's debt agreements contain other covenants and events of default that are customary for similar agreements and may limit our ability to take various actions including our ability to pay a dividend or repurchase our stock.

If we fail to perform our obligations under these and other covenants, the lenders' credit commitment could be terminated and any outstanding borrowings, together with accrued interest, under the Revolving Facility could be declared immediately due and payable. The Company has a cross default provision that applies to our indebtedness having a principal amount in excess of $35.0 million.

As of March 31, 2025, the Company was in compliance with all applicable debt covenants. We do not anticipate violation of these covenants nor do we anticipate that any of these covenants will restrict our operations or our ability to obtain additional financing.

7. Commitments and Contingent Liabilities

Legal Matters

Between 2005 and 2012, the EPA and the Ohio Environmental Protection Agency (“OEPA”) issued Notices of Violations (“NOVs”), alleging violations of air emission operating permits for our Haverhill and Granite City cokemaking facilities. We worked in a cooperative manner with the EPA, the OEPA and the Illinois Environmental Protection Agency to address the allegations and, in November 2014, entered into a consent decree with these parties in federal district court in the Southern District of Illinois. The consent decree included a civil penalty paid in December 2014, and a commitment to undertake capital projects to improve reliability and enhance environmental performance. On March 21, 2025, the United States filed a motion to terminate the consent decree for the Haverhill facility, which was granted by the court on March 25, 2025. Therefore, the consent decree is no longer in effect for Haverhill.

The Company is a party to certain pending and threatened claims, including matters related to commercial disputes, employment claims, personal injury claims, common law tort claims, and environmental claims. Although the ultimate outcome of these claims cannot be ascertained at this time, it is reasonably possible that some portion of these claims could be resolved unfavorably to the Company. Management of the Company believes that any liability which may arise from these claims would likely not have a material adverse impact on our consolidated financial statements. SunCoke's threshold for disclosing material environmental legal proceedings involving a government authority where potential monetary sanctions are involved is $1 million.

8. Share-Based Compensation

Equity Classified Awards

During the three months ended March 31, 2025, the Company granted share-based compensation to eligible participants under the SunCoke Energy, Inc. Omnibus Long-Term Incentive Plan (the “Omnibus Plan”). All awards vest immediately upon a qualifying termination of employment, as defined by the Omnibus Plan, following a change in control.

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Restricted Stock Units Settled in Shares

During the three months ended March 31, 2025, the Company issued 199,178 restricted stock units (“RSU”) to certain employees, to be settled in shares of the Company’s common stock. The weighted average grant date fair value was $9.20 per unit, and was based on the closing price of our common stock on the date of grant. RSUs granted to employees vest and become issuable in three annual installments beginning one year from the date of grant. The service period for certain retiree eligible participants is accelerated. RSUs granted to the Company's Board of Directors vest upon grant, but are paid out upon termination of board service.

Performance Share Units

Performance share units (“PSU”) were granted to certain employees to be settled in shares of the Company's common stock during the three months ended March 31, 2025, for which the service period will end on December 31, 2027, and will vest and become issuable during the first quarter of 2028. The Company granted the following PSUs:


	Shares	Weighted Average Grant Date Fair Value per Unit
PSUs(1)(2)	99,589	$	9.32

(1)Performance measures for the PSU awards are split 50/50 between the Company's three-year cumulative Adjusted EBITDA (as defined in Note 12 to the consolidated financial statements with the exception of the corporate/other expenses adjustment) and the Company's three-year average pre-tax return on capital for its coke and logistics businesses and unallocated corporate expenses.

(2)The number of PSUs ultimately awarded will be determined by the above performance measures versus targets and the Company's three-year total shareholder return (“TSR”) as compared to the TSR of the companies making up the Nasdaq Iron & Steel Index (“TSR Modifier”). The TSR Modifier can impact the payout between 80 percent and 120 percent of the Company's final performance measure results.

Each PSU award may vest between 25 percent and 240 percent of the original units granted. The fair value of the PSUs granted during the three months ended March 31, 2025 is based on the closing price of our common stock on the date of grant as well as a Monte Carlo simulation for the valuation of the TSR Modifier.

Liability Classified Awards

Restricted Stock Units Settled in Cash

During the three months ended March 31, 2025, the Company issued 157,988 restricted stock units to certain employees to be settled in cash (“Cash RSU”), which vest and become payable in three annual installments beginning one year from the grant date. The weighted average grant date fair value of the Cash RSUs granted during the three months ended March 31, 2025 was $9.20 per unit, based on the closing price of our common stock on the date of grant.

The Cash RSUs liability is adjusted based on the closing price of our common stock at the end of each quarterly period and was $0.8 million at March 31, 2025 and $2.6 million at December 31, 2024.

Cash Incentive Awards

The Company also granted long-term cash compensation to eligible participants under the Omnibus Plan. All awards vest immediately upon a qualifying termination of employment, as defined by the Omnibus Plan, following a change in control. The cash incentive award liability is included in accrued liabilities and other deferred credits and liabilities on the Consolidated Balance Sheets.

The Company issued awards with an aggregate grant date fair value of approximately $1.8 million during the three months ended March 31, 2025, for which the service period will end on December 31, 2027 and will vest and become payable during the first quarter of 2028. The service period for certain retiree eligible participants is accelerated. The performance measures for these awards are split 50/50 between the Company's three-year cumulative Adjusted EBITDA and the Company's three-year average pre-tax return on capital for its coke and logistics businesses and unallocated corporate expenses.

The cash incentive award liability at March 31, 2025 was adjusted based on the Company's three-year cumulative Adjusted EBITDA and the Company's three-year adjusted average pre-tax return on capital for its coke and logistics businesses and unallocated corporate expenses. The cash incentive award liability was $3.5 million at March 31, 2025 and $6.8 million at December 31, 2024.

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Summary of Share-Based Compensation Expense

Below is a summary of the compensation expense, unrecognized compensation costs, and the period for which the unrecognized compensation cost is expected to be recognized over:


	Three Months Ended March 31,
	2025		2024				March 31, 2025

	Compensation Expense(1)				Unrecognized Compensation Cost	Weighted Average Remaining Recognition Period
	(Dollars in millions)				(Dollars in millions)	(Years)
Equity Awards:

RSUs	$	0.2	$	0.4			$	2.7	2.2
PSUs	0.2		0.9				1.6		2.2
Total equity awards	$	0.4	$	1.3
Liability Awards:
Cash RSUs	$	—	$	0.5			$	2.3	1.8
Cash incentive award	0.4		1.0				2.9		2.2
Total liability awards	$	0.4	$	1.5

(1)Compensation expense recognized by the Company is included in selling, general and administrative expenses on the Consolidated Statements of Income.

9. Earnings per Share

Basic earnings per share (“EPS”) has been computed by dividing net income attributable to SunCoke Energy, Inc. by the weighted average number of shares outstanding during the period. Except where the result would be anti-dilutive, diluted EPS has been computed to give effect to share-based compensation awards using the treasury stock method.

The following table sets forth the reconciliation of the weighted-average number of common shares used to compute basic EPS to those used to compute diluted EPS:


	Three Months Ended March 31,
	2025	2024

	(Shares in millions)
Weighted-average number of common shares outstanding-basic	85.5	85.0
Add: Effect of dilutive share-based compensation awards	0.1	0.3
Weighted-average number of shares-diluted	85.6	85.3

The following table shows equity awards that are excluded from the computation of diluted EPS as the shares would have been anti-dilutive:


	Three Months Ended March 31,
	2025	2024

	(Shares in millions)
Stock options	0.3	0.6

Performance share units	0.1	—
Total	0.4	0.6

10. Fair Value Measurement

The Company measures certain financial and non-financial assets and liabilities at fair value on a recurring basis. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants on the measurement date. Fair value disclosures are

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reflected in a three-level hierarchy, maximizing the use of observable inputs and minimizing the use of unobservable inputs.

The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability on the measurement date. The three levels are defined as follows:

•Level 1 - inputs to the valuation methodology are quoted prices (unadjusted) for an identical asset or liability in an active market.

•Level 2 - inputs to the valuation methodology include quoted prices for a similar asset or liability in an active market or model-derived valuations in which all significant inputs are observable for substantially the full term of the asset or liability.

•Level 3 - inputs to the valuation methodology are unobservable and significant to the fair value measurement of the asset or liability.

Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis

Cash and Cash Equivalents

Certain assets and liabilities are measured at fair value on a recurring basis. The Company's cash and cash equivalents were measured at fair value at March 31, 2025 and December 31, 2024 based on quoted prices in active markets for identical assets. These inputs are classified as Level 1 within the valuation hierarchy.

Certain Financial Assets and Liabilities not Measured at Fair Value

At March 31, 2025 and December 31, 2024, the fair value of the Company’s total debt was estimated to be $456.7 million and $454.9 million, respectively, compared to a carrying amount of $500.0 million at both periods. The fair value was estimated by management based upon estimates of debt pricing provided by financial institutions, which are considered Level 2 inputs.

11. Revenue from Contracts with Customers

Cokemaking

Our blast furnace coke sales are largely made pursuant to long-term, take-or-pay coke sales agreements primarily with Cleveland-Cliffs Steel Holding Corporation and Cleveland-Cliffs Steel LLC, both subsidiaries of Cleveland Cliffs Inc. and collectively referred to as “Cliffs Steel”, United States Steel Corporation (“U.S. Steel”), and Algoma Steel Inc. The take-or-pay provisions in our agreements require our customers to purchase coke volumes as specified in the agreements or pay the contract price for any tonnage they do not purchase. The take-or-pay provisions of our agreements also require us to deliver minimum annual tonnage. As of March 31, 2025, our coke sales agreements have approximately 18.7 million tons of unsatisfied or partially unsatisfied performance obligations, which are expected to be delivered over a weighted average remaining contract term of approximately nine years.

While the revenues in our Domestic Coke segment are primarily tied to blast furnace coke sales made under long-term, take-or-pay agreements, we also produce and sell foundry coke out of our Jewell cokemaking facility. Foundry coke sales are generally made under annual agreements with our customers for an agreed upon price and do not contain take-or-pay volume commitments.

Non-contracted blast furnace coke sales are produced utilizing capacity in excess of our long-term, take-or-pay agreements and foundry coke. These non-contracted blast furnace coke sales are generally sold on a spot basis at the current market price into the global export and North American coke markets, and do not contain the same provisions as our long-term, take-or-pay agreements.

Revenues on all coke sales are recognized when performance obligations to our customers are satisfied in an amount that reflects the consideration that we expect to receive in exchange for the coke.

Logistics

In our logistics business, handling and/or mixing services are provided to steel, coke (including some of our domestic cokemaking facilities), electric utility, coal producing and other manufacturing based customers. Materials are transported in numerous ways, including rail, truck, barge or ship. We do not take possession of materials handled, but rather act as intermediaries between our customers and end users, deriving our revenues from services provided on a per ton basis. The handling and mixing services consist primarily of two performance obligations, unloading and loading of materials. Revenues are recognized when the customer receives the benefits of the services provided, in an amount that reflects the consideration that we will receive in exchange for those services.

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Estimated take-or-pay revenue of approximately $53.4 million from all of our multi-year logistics contracts is expected to be recognized over the next three years for unsatisfied or partially unsatisfied performance obligations as of March 31, 2025.

Disaggregated Sales and Other Operating Revenue

The following table provides disaggregated sales and other operating revenue by product or service, excluding intersegment revenues:


	Three Months Ended March 31,
	2025		2024

	(Dollars in millions)
Sales and other operating revenue:
Cokemaking	$	391.3	$	446.7
Energy	12.8		11.9
Logistics	22.1		20.3
Operating and licensing fees	7.8		8.3
Other	2.0		1.2
Sales and other operating revenue	$	436.0	$	488.4

The following tables provide disaggregated sales and other operating revenue by customer:


	Three Months Ended March 31,
	2025		2024

	(Dollars in millions)
Sales and other operating revenue:
Cliffs Steel	$	299.3	$	317.3
U.S. Steel	60.0		72.0
Other	76.7		99.1
Sales and other operating revenue	$	436.0	$	488.4

12. Business Segment Information

The Company reports its business through three reportable segments: Domestic Coke, Brazil Coke and Logistics. The Domestic Coke segment includes the Jewell, Indiana Harbor, Haverhill, Granite City and Middletown cokemaking facilities. Each of these facilities produces coke, and all facilities except Jewell recover waste heat, which is converted to steam or electricity.

The Brazil Coke segment includes the licensing and operating fees payable to us under long-term contracts with ArcelorMittal Brazil, under which we operate a cokemaking facility located in Vitória, Brazil through January 2028.

Logistics operations are comprised of Convent Marine Terminal (“CMT”), Kanawha River Terminal (“KRT”), and Lake Terminal, which provides services to our Indiana Harbor cokemaking facility. Handling and mixing results are presented in the Logistics segment.

Corporate expenses that can be identified with a segment have been included in determining segment results. The remainder is included in Corporate and Other, which is not a reportable segment, but which also includes activity from our legacy coal mining business.

Segment assets are those assets utilized within a specific segment.

In considering the financial performance of the business, the chief operating decision maker (“CODM”), who is the Company’s President and Chief Executive Officer, evaluates the performance of its segments based on Adjusted EBITDA reportable segments, which is defined as earnings before interest, taxes, depreciation and amortization, adjusted for any impairments, restructuring costs, gains or losses on extinguishment of debt, transaction costs, and/or corporate/other expenses (“Adjusted EBITDA reportable segments”). The CODM uses this measure to help determine the allocation of costs and resources to our reportable segments. Additionally, other companies may calculate Adjusted EBITDA reportable segments differently than we do, limiting its usefulness as a comparative measure.

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The following tables include Adjusted EBITDA reportable segments, as defined above, which is a measure of segment profit or loss reported to the chief operating decision maker for purposes of allocating resources to the segments and assessing their performance.


	Three Months Ended March 31, 2025
	(Dollars in millions)
	Domestic Coke		Brazil Coke		Logistics		Total
Sales and other operating revenue	$	405.8	$	7.8	$	22.4	$	436.0
Intersegment revenues	—		—		5.6		5.6
Net revenues	405.8		7.8		28.0		441.6

Reconciliation of revenue
Elimination of intersegment revenues							(5.6)
Total consolidated revenues							436.0

Less:(1)
Operating and maintenance expense	71.1		4.8		14.0
Cost of products sold and other expenses(2)	277.9		—		—
Selling, general and administrative expenses	6.9		0.7		0.3
Adjusted EBITDA reportable segments	49.9		2.3		13.7		65.9
Depreciation and amortization expense							28.8
Interest expense, net(3)							5.2
Other corporate expenses(4)							6.9
Income before income tax expense							$	25.0

(1)The significant expense categories and amounts align with segment-level information that is regularly provided to the CODM.

(2)Cost of products sold and other expenses includes coal and transportation costs.

(3)Interest expense, net of $5.2 million reflects (i) consolidated interest expense of $6.8 million and (ii) consolidated interest income of $1.6 million.

(4)Other corporate expenses represents business expenses not allocated to the Company’s reportable segments and are included in Corporate, which is not a reportable segment.

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	Three Months Ended March 31, 2024
	(Dollars in millions)
	Domestic Coke		Brazil Coke		Logistics		Total
Sales and other operating revenue	$	459.5	$	8.3	$	20.6	$	488.4
Intersegment revenues	—		—		5.9		5.9
Net revenues	459.5		8.3		26.5		494.3

Reconciliation of revenue
Elimination of intersegment revenues							(5.9)
Total consolidated revenues							488.4

Less:(1)
Operating and maintenance expense	71.5		5.1		13.0
Cost of products sold and other expenses(2)	318.7		—		—
Selling, general and administrative expenses	7.9		0.8		0.5
Adjusted EBITDA reportable segments	61.4		2.4		13.0		76.8
Depreciation and amortization expense							33.3
Interest expense, net(3)							6.3
Other corporate expenses(4)							9.0
Income before income tax expense							$	28.2

(1)The significant expense categories and amounts align with segment-level information that is regularly provided to the CODM.

(2)Cost of products sold and other expenses includes coal and transportation costs.

(3)Interest expense, net of $6.3 million reflects (i) consolidated interest expense of $7.2 million and (ii) consolidated interest income of $0.9 million.

(4)Other corporate expenses represents business expenses not allocated to the Company’s reportable segments and are included in Corporate, which is not a reportable segment.

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The following table sets forth the Company’s depreciation and amortization expense as well as its capital expenditures:


	Three Months Ended March 31,
	2025		2024

	(Dollars in millions)
Depreciation and amortization expense:
Domestic Coke	$	25.1	$	29.9
Logistics	3.1		3.2
Brazil Coke	0.1		0.1
Total reportable segments	$	28.3	$	33.2
Corporate and Other	0.5		0.1
Total depreciation and amortization expense	$	28.8	$	33.3

Capital expenditures:
Domestic Coke	$	2.1	$	14.5
Logistics	2.7		0.6
Brazil Coke	0.1		—
Total reportable segments	$	4.9	$	15.1
Corporate and Other	—		0.4
Total capital expenditures	$	4.9	$	15.5

The following table sets forth the Company's segment assets:


	March 31, 2025		December 31, 2024

	(Dollars in millions)
Segment assets:
Domestic Coke	$	1,335.1	$	1,351.1
Logistics	161.8		158.2
Brazil Coke	11.3		10.2
Total reportable segments	$	1,508.2	$	1,519.5
Corporate and Other	160.2		148.7
Total assets	$	1,668.4	$	1,668.2

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

This Quarterly Report on Form 10-Q for the quarter ended March 31, 2025 (this “Quarterly Report on Form 10-Q”) contains certain forward-looking statements, as defined in the Private Securities Litigation Reform Act of 1995. This discussion contains forward-looking statements about our business, operations and industry that involve risks and uncertainties, such as statements regarding our plans, objectives, expected future developments, expectations and intentions, and they involve known and unknown risks that are difficult to predict. As a result, our future results and financial condition may differ materially from those we currently anticipate as a result of the factors we describe in our filings with the Securities and Exchange Commission (the “SEC”), including our Annual Report on Form 10-K for the year ended December 31, 2024 (the “Annual Report on Form 10-K”), and as updated in this Quarterly Report on Form 10-Q, and other quarterly and current reports, which are on file with the SEC and are available at the SEC's website (www.sec.gov). Additionally, please see our “Cautionary Statement Concerning Forward-Looking Statements” located elsewhere in this Quarterly Report on Form 10-Q.

This Management’s Discussion and Analysis of Financial Condition and Results of Operations (“MD&A”) is based on financial data derived from the financial statements prepared in accordance with the United States generally accepted accounting principles (“GAAP”) and certain other financial data that is prepared using a non-GAAP measure. For a reconciliation of the non-GAAP measure to its most comparable GAAP component, see “Non-GAAP Financial Measures” at the end of this Item 2.

Our MD&A is provided in addition to the accompanying consolidated financial statements and notes to assist readers in understanding our results of operations, financial condition and cash flow.

Overview

We also own and operate a logistics business that provides export and domestic material handling and/or mixing services to steel, coke (including some of our domestic cokemaking facilities), electric utility, coal producing and other manufacturing based customers. Our logistics terminals, which are strategically located to reach Gulf Coast, East Coast, Great Lakes and international ports, have the collective capacity to mix and/or transload more than 40 million tons of coal and other products annually and has storage capacity of approximately 3 million tons.

Market Discussion

Our long-term, take-or-pay Domestic Coke sales agreements, which largely consume our capacity, are not impacted by the fluctuations of global coke prices. Non-contracted blast furnace coke, which is produced utilizing capacity in excess of that reserved for long-term, take-or-pay Domestic Coke sales agreements, is sold in the global market and sales can be impacted by fluctuations in both global coke prices and demand.

Our Convent Marine Terminal (“CMT”) serves certain customers impacted by seaborne export market dynamics. Volumes through CMT are impacted by fluctuations in global energy needs and benchmark pricing for coal exports out of the U.S. Gulf Coast, which can be impacted by weather conditions, natural gas prices, geopolitical issues, U.S. thermal coal supply and global thermal coal demand. Our Kanawha River Terminal (“KRT”) serves two primary domestic markets, metallurgical coal trade and thermal coal trade. Metallurgical markets are primarily impacted by steel prices and blast furnace operating levels whereas thermal markets are impacted by natural gas prices and electricity demand.

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First Quarter Key Financial Results

Our consolidated results of operations were as follows:


	Three Months Ended March 31,				Increase (Decrease)
	2025		2024

	(Dollars in millions)
Net income	$	19.4	$	21.1	$	(1.7)

Net cash provided by operating activities	$	25.8	$	10.0	$	15.8
Adjusted EBITDA(1)	$	59.8	$	67.9	$	(8.1)

(1)See the “Non-GAAP Financial Measures” section below for both the definition of Adjusted EBITDA and the reconciliation from GAAP to the non-GAAP measurement.

Operating results for the three months ended March 31, 2025 reflect lower volumes and pricing in our Domestic Coke segment as a result of challenging blast furnace coke spot market conditions as well as the impact of the Granite City contract extension economics. These negative impacts were partially offset by higher transloading volumes in our Logistics segment. See detailed analysis of the quarter's results throughout this MD&A.

Recent Developments

•Granite City Contract Extension. In April 2025, the Granite City long-term, take-or-pay agreement with United States Steel Corporation (“U.S. Steel”) was extended through September 30, 2025, with an option for U.S. Steel to extend for an additional three months through December 31, 2025. The provisions and economics of this extension remain unchanged from those included in the extension executed in 2024.

Results of Operations

The following table sets forth amounts from the Consolidated Statements of Income for the three months ended March 31, 2025 and 2024, respectively:


	Three Months Ended March 31,				Increase (Decrease)
	2025		2024

	(Dollars in millions)
Revenues
Sales and other operating revenue	$	436.0	$	488.4	$	(52.4)
Costs and operating expenses
Cost of products sold and operating expenses	362.3		402.2		(39.9)
Selling, general and administrative expenses	14.7		18.4		(3.7)
Depreciation and amortization expense	28.8		33.3		(4.5)
Total costs and operating expenses	405.8		453.9		(48.1)
Operating income	30.2		34.5		(4.3)
Interest expense, net	5.2		6.3		(1.1)
Income before income tax expense	25.0		28.2		(3.2)
Income tax expense	5.6		7.1		(1.5)
Net income	19.4		21.1		(1.7)
Less: Net income attributable to noncontrolling interests	2.1		1.1		1.0
Net income attributable to SunCoke Energy, Inc.	$	17.3	$	20.0	$	(2.7)

Sales and Other Operating Revenue and Costs of Products Sold and Operating Expenses. Sales and other operating revenue and costs of products sold and operating expenses decreased for the three months ended March 31, 2025 compared to the same prior year period, primarily driven by lower volumes due to challenging market conditions in the blast furnace coke spot market and the impact of the Granite City contract extension economics, as well as the impact of the pass-through of lower coal prices on our long-term, take-or-pay agreements.

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Selling, General and Administrative Expenses. Selling, general and administrative expenses during the three months ended March 31, 2025 benefited from lower employee related expenses and lower expenses related to our legacy coal mining business.

Depreciation and Amortization Expense. Depreciation and amortization expense for the three months ended March 31, 2025 decreased as a result of the expiration of the useful lives of assets in our Domestic Coke segment placed into service in prior periods.

Interest Expense, Net. Interest expense, net, during the three months ended March 31, 2025 primarily benefited from higher interest income of $0.7 million as compared to the same prior year period.

Income Tax Expense. The Company's effective tax rate was 22.4 percent and 25.2 percent for the three months ended March 31, 2025 and 2024, respectively. The effective tax rate for the three months ended March 31, 2025 was impacted by lower state income taxes as compared to the prior year period. See Note 4 to our consolidated financial statements for further detail.

Noncontrolling Interest. Net income attributable to noncontrolling interests represents a 14.8 percent third-party interest in our Indiana Harbor cokemaking facility and fluctuates with the financial performance of that facility.

Results of Reportable Business Segments

We report our business results through three reportable segments:

•Domestic Coke consists of our Jewell facility, located in Vansant, Virginia, our Indiana Harbor facility, located in East Chicago, Indiana, our Haverhill facility, located in Franklin Furnace, Ohio, our Granite City facility located in Granite City, Illinois, and our Middletown facility located in Middletown, Ohio.

•Brazil Coke consists of operations in Vitória, Brazil, where we operate the ArcelorMittal Brazil cokemaking facility.

•Logistics consists of CMT, located in Convent, Louisiana, KRT, located in Ceredo and Belle, West Virginia, and Lake Terminal, located in East Chicago, Indiana. Lake Terminal is located adjacent to our Indiana Harbor cokemaking facility.

Corporate expenses that can be identified with a segment have been included in determining segment results. The remainder is included in Corporate and Other, including activity from our legacy coal mining business, which is not considered a reportable segment and therefore, not included in our segment information in Note 12. However, we have included Corporate and Other within our operating data below.

Management believes Adjusted EBITDA is an important measure of operating performance, which is used by the chief operating decision maker as one of the measurements to help determine the allocation of costs and resources to our reportable segments. Adjusted EBITDA should not be considered a substitute for the reported results prepared in accordance with GAAP. See the “Non-GAAP Financial Measures” section below for both the definition of Adjusted EBITDA and the reconciliation from GAAP to the non-GAAP measurement.

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Segment Financial and Operating Data

The following tables set forth financial and operating data by segment:


	Three Months Ended March 31,
	2025			2024

	(Dollars in millions)
Sales and Other Operating Revenues:
Domestic Coke	$	405.8		$	459.5
Brazil Coke	7.8			8.3
Logistics	22.4			20.6
Logistics intersegment sales	5.6			5.9
Elimination of intersegment sales	(5.6)			(5.9)
Total sales and other operating revenues	$	436.0		$	488.4
Adjusted EBITDA:
Domestic Coke	$	49.9		$	61.4
Brazil Coke	2.3			2.4
Logistics	13.7			13.0
Corporate and Other, net(1)	(6.1)			(8.9)
Total Adjusted EBITDA(2)	$	59.8		$	67.9
Coke Operating Data:
Domestic Coke capacity utilization(3)	91		%	100		%
Domestic Coke production volumes (thousands of tons)	905			1,000
Domestic Coke sales volumes (thousands of tons)	898			996
Domestic Coke Adjusted EBITDA per ton(4)	$	55.57		$	61.65
Brazilian Coke production—operated facility (thousands of tons)	380			371
Logistics Operating Data:
Tons handled (thousands of tons)	5,724			5,453

(1)Corporate and Other, net is not a reportable segment.

(2)See the “Non-GAAP Financial Measures” section below for both the definition of Adjusted EBITDA and the reconciliation from GAAP to the non-GAAP measurement.

(3)The production of foundry coke tons does not replace blast furnace coke tons on a ton for ton basis, as foundry coke requires longer coking time. The Domestic Coke capacity utilization is calculated assuming a single ton of foundry coke replaces approximately two tons of blast furnace coke.

(4)Reflects Domestic Coke Adjusted EBITDA divided by Domestic Coke sales volumes.

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Analysis of Segment Results

Domestic Coke

The following table sets forth year-over-year changes in the Domestic Coke segment's sales and other operating revenues and Adjusted EBITDA results:


	Three Months Ended March 31, 2025 vs. 2024
	Sales and other operating revenue		Adjusted EBITDA

	(Dollars in millions)
Prior year period	$	459.5	$	61.4
Volume(1)	(42.7)		(10.1)
Price(2)	(12.7)		(2.9)
Operating and maintenance costs	N/A		(1.4)
Energy and other(3)	1.7		2.9
Current year period	$	405.8	$	49.9

(1)Lower volumes during the three months ended March 31, 2025 were primarily driven by lower non-contracted blast furnace coke sales as a result of challenging market conditions in the blast furnace coke spot market, as well as the impact of the Granite City contract extension.

(2)The pass-through of lower coal prices decreased sales and other operating revenue during the three months ended March 31, 2025. The impact of lower economics on the Granite City contract extension negatively impacted both sales and other operating revenue and Adjusted EBITDA during the current year period. Additionally, Adjusted EBITDA was negatively impacted by lower coal-to-coke yields on our long-term, take-or-pay agreements.

(3)Energy and other during the three months ended March 31, 2025 increased due to favorable energy pricing and volumes.

Logistics

During the three months ended March 31, 2025, sales and other operating revenues, exclusive of intersegment sales, were $22.4 million, compared to $20.6 million, in the corresponding prior year period. Adjusted EBITDA, inclusive of the impact of intersegment transactions, during the three months ended March 31, 2025 was $13.7 million, compared to $13.0 million, in the corresponding prior year period. Logistics results during the three months ended March 31, 2025, as compared to the same prior year period reflect higher transloading volumes at CMT, partially offset by lower transloading pricing at CMT driven by the absence of an index price adjustment benefit.

Brazil

During the three months ended March 31, 2025, sales and other operating revenue and Adjusted EBITDA were $7.8 million and $2.3 million, respectively, which was reasonably consistent with $8.3 million and $2.4 million, respectively, in the corresponding prior year period.

Corporate and Other

Corporate and Other Adjusted EBITDA represented a loss of $6.1 million and $8.9 million for the three months ended March 31, 2025 and 2024, respectively. The three months ended March 31, 2025 benefited from lower employee related expenses and lower expenses related to our legacy coal mining business.

Non-GAAP Financial Measures

In addition to the GAAP results provided in this Quarterly Report on Form 10-Q, we have provided a non-GAAP financial measure, Adjusted EBITDA. Our management, as well as certain investors, use this non-GAAP measure to analyze our current and expected future financial performance. This measure is not in accordance with, or a substitute for, GAAP and may be different from, or inconsistent with, non-GAAP financial measures used by other companies.

The Company evaluates the performance of its segments based on segment Adjusted EBITDA, which is defined as earnings before interest, taxes, depreciation and amortization (“EBITDA”), adjusted for any impairments, restructuring costs, gains or losses on extinguishment of debt, and/or transaction costs (“Adjusted EBITDA”). EBITDA and Adjusted EBITDA do

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not represent and should not be considered alternatives to net income or operating income under GAAP and may not be comparable to other similarly titled measures in other businesses.

Management believes Adjusted EBITDA is an important measure in assessing operating performance. Adjusted EBITDA provides useful information to investors because it highlights trends in our business that may not otherwise be apparent when relying solely on GAAP measures and because it eliminates items that have less bearing on our operating performance. EBITDA and Adjusted EBITDA are not measures calculated in accordance with GAAP, and they should not be considered a substitute for net income, or any other measure of financial performance presented in accordance with GAAP. Additionally, other companies may calculate Adjusted EBITDA differently than we do, limiting its usefulness as a comparative measure.

Reconciliation of Non-GAAP Financial Measures

Below is a reconciliation of Adjusted EBITDA to net income, which is its most directly comparable financial measure calculated and presented in accordance with GAAP:


	Three Months Ended March 31,
	2025		2024

	(Dollars in millions)


Net income	$	19.4	$	21.1
Add:
Depreciation and amortization expense	28.8		33.3
Interest expense, net	5.2		6.3
Income tax expense	5.6		7.1
Transaction costs(1)	0.8		0.1
Adjusted EBITDA	$	59.8	$	67.9

(1)Reflects costs incurred related to potential mergers and acquisitions and the granulated pig iron project with U.S. Steel.

Liquidity and Capital Resources

Our primary liquidity needs are to fund working capital and investments, service our debt, maintain cash reserves and replace partially or fully depreciated assets and other capital expenditures. Our sources of liquidity include cash generated from operations, borrowings under our revolving credit facility (“Revolving Facility”) and, from time to time, debt and equity offerings. We believe our current resources are sufficient to meet our working capital requirements for our current business for at least the next 12 months and thereafter for the foreseeable future. As of March 31, 2025, we had $193.7 million of cash and cash equivalents and $350.0 million of borrowing availability under our Revolving Facility.

We may, from time to time, seek to retire or purchase additional amounts of our outstanding equity and/or debt securities through cash purchases and/or exchanges for other securities, in open market purchases, privately negotiated transactions or 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. Refer to “Part II Item 2 - Unregistered Sales of Equity Securities and Use of Proceeds.”

Cash Flow Summary

The following table sets forth a summary of the net cash provided by (used in) operating, investing and financing activities for the three months ended March 31, 2025 and 2024:


	Three Months Ended March 31,
	2025		2024

	(Dollars in millions)
Net cash provided by operating activities	$	25.8	$	10.0
Net cash used in investing activities	(4.6)		(15.1)
Net cash used in financing activities	(17.1)		(14.9)
Net increase (decrease) in cash and cash equivalents	$	4.1	$	(20.0)

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Cash Flows from Operating Activities

Net cash provided by operating activities increased by $15.8 million to $25.8 million for the three months ended March 31, 2025 as compared to $10.0 million in the corresponding prior year period. The increase primarily reflects a favorable year-over-year change in primary working capital, which is comprised of accounts receivable, inventories, and accounts payable, driven by lower sales volumes, which was partially offset by higher coal inventory volumes. See Note 7 to our consolidated financial statements for further detail.

Cash Flows from Investing Activities

Net cash used in investing activities decreased by $10.5 million to $4.6 million for the three months ended March 31, 2025 as compared to $15.1 million in the corresponding prior year period. Both periods primarily reflect ongoing capital expenditures. Refer to Capital Requirements and Expenditures below for further detail.

Cash Flows from Financing Activities

Net cash used in financing activities increased by $2.2 million to $17.1 million for the three months ended March 31, 2025 as compared to $14.9 million in the corresponding prior year period. The increase in net cash used in financing activities was primarily driven by an increase to dividends paid of $1.9 million as compared to the prior year period, primarily as a result of an increase in the dividend per share amount, and higher cash distributions made to noncontrolling interests of $0.8 million.

Dividends

On January 30, 2025, SunCoke's Board of Directors declared a cash dividend of $0.12 per share of the Company's common stock. This dividend was paid on March 3, 2025, to stockholders of record on February 17, 2025.

Additionally, on April 30, 2025, SunCoke's Board of Directors declared a cash dividend of $0.12 per share of the Company's common stock. This dividend will be paid on June 2, 2025, to stockholders of record on May 16, 2025.

Covenants

As of March 31, 2025, we were in compliance with all applicable debt covenants. We do not anticipate a violation of these covenants nor do we anticipate that any of these covenants will restrict our operations or our ability to obtain additional financing. See Note 6 to the consolidated financial statements for details on debt covenants.

Capital Requirements and Expenditures

Our operations are capital intensive, requiring significant investment to upgrade or enhance existing operations and to meet environmental and operational regulations. The level of future capital expenditures will depend on various factors, including market conditions, regulatory requirements and customer requirements, and may differ from current or anticipated levels. Material changes in capital expenditure levels may impact financial results, including but not limited to the amount of depreciation, interest expense and repair and maintenance expense.

Our capital requirements have consisted, and are expected to consist, primarily of:

•Ongoing capital expenditures required to maintain equipment reliability, the integrity and safety of our coke ovens, steam generators and assets at our logistics terminals and to comply with environmental regulations. Ongoing capital expenditures are made to replace partially or fully depreciated assets in order to maintain the existing operating capacity of the assets and/or to extend their useful lives and also include new equipment that improves the efficiency, reliability or effectiveness of existing assets. Ongoing capital expenditures do not include normal repairs and maintenance expenses, which are expensed as incurred;

•Expansion capital expenditures to acquire and/or construct complementary assets to grow our business and to expand existing facilities as well as capital expenditures made to grow our business through new markets or enable the renewal of a coke sales agreement and/or logistics service agreement and on which we expect to earn a reasonable return; and

•Environmental project expenditures to ensure that our existing facilities operate in accordance with changing regulations.

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The following table summarizes our capital expenditures:


	Three Months Ended March 31,
	2025		2024

	(Dollars in millions)
Ongoing capital	$	4.1	$	14.5
Expansion capital	0.8		1.0
Total capital expenditures(1)	$	4.9	$	15.5

(1)Reflects actual cash payments during the periods presented for our capital requirements.

Critical Accounting Policies

In August 2024, the Company reached an agreement with the U.S. Department of Labor’s Division of Coal Mine Workers Compensation (“DCMWC”) for a regulatory exemption that eliminated the majority of the Company's legacy black lung benefit obligations, resulting in a $45.5 million reduction of the Company's black lung liability. As of result, the Company has determined our black lung benefit obligations is no longer considered a critical accounting estimate as it does not involve a significant level of estimation uncertainty that would likely have a material effect on our financial condition or results of operations. For further discussion of the DCMWC agreement, see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Critical Accounting Policies and Estimates” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2024.

Recent Accounting Standards

There have been no new accounting standards material to the Company that have been adopted during the three months ended March 31, 2025.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

There have been no material changes to the Company's exposure to market risk previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2024.

Item 4. Controls and Procedures

Management’s Evaluation of Disclosure Controls and Procedures

The Company maintains disclosure controls and procedures, (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended) that are designed to ensure that information required to be disclosed in its reports filed or submitted under the Exchange Act 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 the Company’s management, including its Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives.

The Company carried out an evaluation, under the supervision and with the participation of management, including its Chief Executive Officer and Chief Financial Officer, of the effectiveness of the Company’s disclosure controls and procedures as of the end of the period covered by this report. Based on this evaluation, the Company’s Chief Executive Officer and Chief Financial Officer concluded that the Company's disclosure controls and procedures were effective at a reasonable assurance level as of the end of the period covered by this report.

Changes in Internal Control over Financial Reporting

There have been no changes in the Company’s internal control over financial reporting that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting during the quarter ended March 31, 2025.

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PART II – OTHER INFORMATION

Item 1. Legal Proceedings

The information presented in Note 7 to our consolidated financial statements within this Quarterly Report on Form 10-Q is incorporated herein by reference.

Certain legal and administrative proceedings are pending or may be brought against us arising out of our current and past operations, including matters related to commercial disputes, employment claims, personal injury claims, common law tort claims, and general environmental claims. Although the ultimate outcome of these proceedings cannot be ascertained at this time, it is reasonably possible that some of them could be resolved unfavorably to us. Our management believes that any liabilities that may arise from such matters would not likely be material in relation to our business or our consolidated financial position, results of operations or cash flows at March 31, 2025.

Item 1A. Risk Factors

There have been no material changes with respect to risk factors previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2024.

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

On October 28, 2019, the Company's Board of Directors authorized a program to repurchase outstanding shares of the Company’s common stock, $0.01 par value per share, from time to time in open market transactions at prevailing market prices, in privately negotiated transactions, or by other means in accordance with federal securities laws, for a total aggregate cost to the Company not to exceed $100.0 million. There have been no share repurchases since the first quarter of 2020. As of March 31, 2025, $96.3 million remains available under the authorized repurchase program.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

While the Company divested substantially all of its remaining coal mining assets in April 2016, the Company remains responsible for reclamation of certain legacy coal mining locations that are subject to Mine Safety and Health Administration (“MSHA”) regulatory purview and the Company continues to own certain logistics assets that are regulated by MSHA. The information concerning mine safety violations and other regulatory matters that we are required to report in accordance with Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 104 of Regulation S-K (17 CFR 229.014) is included in Exhibit 95.1 to this Quarterly Report on Form 10-Q.

Item 5. Other Information

None.

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Item 6. Exhibits

Exhibit
Number

Description

3.1

Amended and Restated Certificate of Incorporation of the Company (incorporated by reference herein to Exhibit 3.1 to the Company’s Amendment No. 4 to Registration Statement on Form S-1 filed on July 6, 2011, File No. 333-173022)

3.2

Amended and Restated Bylaws of SunCoke Energy, Inc., effective as of February 23, 2023 (incorporated by reference herein to Exhibit 3.2 to the Company’s Annual Report on Form 10-K, filed on February 24, 2023, File No. 001-35243)

22.1*

List of Issuers and Guarantor Subsidiaries

31.1*

Chief Executive Officer Certification Pursuant to Exchange Act Rule 13a-14(a) or Rule 15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

31.2*

Chief Financial Officer Certification Pursuant to Exchange Act Rule 13a-14(a) or Rule 15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

32.1**

Chief Executive Officer Certification Pursuant to Exchange Act Rule 13a-14(b) or Rule 15d-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code, as Adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

32.2**

Chief Financial Officer Certification Pursuant to Exchange Act Rule 13a-14(b) or Rule 15d-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code, as Adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

95.1*

Mine Safety Disclosures

101

The following financial statements from SunCoke Energy, Inc.'s Quarterly Report on Form 10-Q for the three months ended March 31, 2025, filed with the Securities and Exchange Commission on April 30, 2025, is formatted in iXBRL (Inline eXtensible Business Reporting Language): (i) the Consolidated Statements of Income, (ii) the Consolidated Statements of Comprehensive Income, (iii) the Consolidated Balance Sheets, (iv) the Consolidated Statements of Cash Flows, (v) the Consolidated Statements of Equity, and (vi) the Notes to Consolidated Financial Statements.

104

The cover page from SunCoke Energy, Inc's Quarterly Report on Form 10-Q for the three months ended March 31, 2025 is formatted in iXBRL (Inline eXtensible Business Reporting Language) and contained in Exhibit 101.


*			Filed herewith.
**			Furnished herewith.

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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 thereunto duly authorized.

SunCoke Energy, Inc.

Dated:

April 30, 2025

By:

/s/ Mark W. Marinko

Mark W. Marinko

Senior Vice President and Chief Financial Officer
(Duly Authorized Officer)
(Principal Financial and Accounting Officer)

Exhibit 22.1

SunCoke Energy, Inc.

List of Issuers and Guarantor Subsidiaries

If a series of registered debt securities issued by SunCoke Energy, Inc. is guaranteed, such series will be guaranteed by one or more of the subsidiaries listed below.

Exact Name of Registrant as Specified in its Charter

State or Other Jurisdiction of Incorporation or Organization

Designation

SunCoke Energy, Inc.

Delaware

Issuer

Ceredo Liquid Terminal LLC

Delaware

Guarantor

CMT Liquids Terminal LLC

Delaware

Guarantor

Dismal River Terminal LLC

Delaware

Guarantor

Elk River Minerals Corporation

Delaware

Guarantor

FF Farm Holdings LLC

Delaware

Guarantor

Gateway Energy & Coke Company LLC

Delaware

Guarantor

Haverhill Coke Company LLC

Delaware

Guarantor

Indiana Harbor Coke Company

Delaware

Guarantor

Indiana Harbor Coke Corporation

Indiana

Guarantor

Jewell Coal & Coke Company, Inc.

Virginia

Guarantor

Jewell Coke Acquisition Company

Virginia

Guarantor

Jewell Coke Company, L.P.

Delaware

Guarantor

Jewell Resources Corporation

Virginia

Guarantor

Kanawha River Terminals, LLC

Delaware

Guarantor

Marigold Dock, Inc.

Delaware

Guarantor

Middletown Coke Company, LLC

Delaware

Guarantor

Raven Energy, LLC

Delaware

Guarantor

Sun Coal & Coke LLC

Delaware

Guarantor

SunCoke Energy South Shore LLC

Delaware

Guarantor

SunCoke Lake Terminal LLC

Delaware

Guarantor

SunCoke Logistics LLC

Delaware

Guarantor

SunCoke Technology and Development LLC

Delaware

Guarantor

Exhibit 31.1

CERTIFICATION

I, Katherine T. Gates, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q for the quarter ended March 31, 2025 of SunCoke Energy, Inc. (the “registrant”);

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(s) 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 control 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(s) 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.

/s/ Katherine T. Gates

Katherine T. Gates

President and Chief Executive Officer

(Principal Executive Officer)

April 30, 2025

Exhibit 31.2

CERTIFICATION

I, Mark W. Marinko, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q for the quarter ended March 31, 2025 of SunCoke Energy, Inc. (the “registrant”);

(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.

/s/ Mark W. Marinko

Mark W. Marinko

Senior Vice President and Chief Financial Officer

(Principal Financial Officer)

April 30, 2025

Exhibit 32.1

CERTIFICATION

CHIEF EXECUTIVE OFFICER

SUNCOKE ENERGY, INC.

PURSUANT TO 18 U.S.C. SECTION 1350

In connection with this Quarterly Report on Form 10-Q of SunCoke Energy, Inc. for the fiscal quarter ended March 31, 2025, I, Katherine T. Gates, President and Chief Executive Officer of SunCoke Energy, Inc., hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

1.This Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2025 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in this Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2025 fairly presents, in all material respects, the financial condition and results of operations of SunCoke Energy, Inc. for the periods presented therein.

/s/ Katherine T. Gates

Katherine T. Gates

President and Chief Executive Officer

(Principal Executive Officer)

April 30, 2025

Exhibit 32.2

CERTIFICATION

CHIEF FINANCIAL OFFICER

SUNCOKE ENERGY, INC.

PURSUANT TO 18 U.S.C. SECTION 1350

In connection with this Quarterly Report on Form 10-Q of SunCoke Energy, Inc. for the fiscal quarter ended March 31, 2025, I, Mark W. Marinko, Senior Vice President and Chief Financial Officer of SunCoke Energy, Inc., hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

1.This Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2025 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

/s/ Mark W. Marinko

Mark W. Marinko

Senior Vice President and Chief Financial Officer

(Principal Financial Officer)

April 30, 2025

Exhibit 95.1

SunCoke Energy, Inc.

Mine Safety Disclosures for the Quarter Ended March 31, 2025

We are committed to maintaining a safe work environment and working to ensure environmental compliance across all of our operations. The health and safety of our employees and limiting the impact to communities in which we operate are critical to our long-term success. We employ practices and conduct training to help ensure that our employees work safely. Furthermore, we utilize processes for managing, monitoring and improving safety and environmental performance.

We have consistently operated within the top quartiles for the U.S. Occupational Safety and Health Administration’s recordable injury rates as measured and reported by the American Coke and Coal Chemicals Institute. We also have worked to maintain low injury rates reportable to the U.S. Department of Labor’s Mine Safety and Health Administration (“MSHA”) and won the Sentinels of Safety award for 2008, 2013 and 2016 from MSHA for having the mine with the most employee hours worked without experiencing a lost-time injury in that mine’s category.

The following table presents the information concerning mine safety violations and other regulatory matters that we are required to report in accordance with Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act. Whenever MSHA believes that a violation of the Federal Mine Safety and Health Act of 1977 (the “Mine Act”), any health or safety standard, or any regulation has occurred, it may issue a citation which describes the violation and fixes a time within which the operator must abate the violation. In these situations, MSHA typically proposes a civil penalty, or fine, that the operator is ordered to pay. In evaluating the following table regarding mine safety, investors should take into account factors such as: (1) the number of citations and orders will vary depending on the size of a coal mine, (2) the number of citations issued will vary from inspector to inspector, mine to mine and MSHA district to district and (3) citations and orders can be contested and appealed, and during that process are often reduced in severity and amount, and are sometimes dismissed.

The mine data retrieval system maintained by MSHA may show information that is different than what is provided in the table below. Any such difference may be attributed to the need to update that information on MSHA’s system or other factors. Orders and citations issued to independent contractors who work at our mine sites are not reported in the table below. All section references in the table below refer to provisions of the Mine Act.


Operating Name/MSHA Identification Number	Section 104 S&S Citations (#)(2)	Section 104(b) Orders (#)(3)	Section 104(d) Citations and Orders (#)(4)	Section 110(b)(2) Violations (#)(5)	Section 107(a) Orders (#)(6)	Total Dollar Value of MSHA Assessments Proposed ($)(7)	Total Number of Mining Related Fatalities (#)	Received Notice of Pattern of Violations Under Section 104(e) (yes/no)(8)	Received Notice of Potential to Have Pattern Under Section 104(e) (yes/no)(9)	Legal Actions Pending as of Last Day of Period (#)(10)(11)	Legal Actions Initiated During Period (#)(12)	Legal Actions Resolved During Period (#)(13)

Ceredo Dock / 46-09051	—	—	—	—	—	—	151	no	no	—	—	—
Quincy Dock / 46-07736	—	—	—	—	—	—	—	no	no	—	—	—
Dismal River Terminal / B3121	—	—	—	—	—	—	—	no	no	—	—	—
Jewell Coal Corp / 44-00649	1	—	—	—	—	—	—	no	no	—	—	—
Total	1	—	—	—	—	—	151	no	no	—	—	—

(1) The table does not include the following: (i) facilities which have been idle or closed unless they received a citation or order issued by MSHA, (ii) permitted mining sites where we have not begun operations or (iii) mines that are operated on our behalf by contractors who hold the MSHA numbers and have the MSHA liabilities.

(2) Alleged violations of mandatory health or safety standards that could significantly and substantially contribute to the cause and effect of a coal or other mine safety or health hazard.

(3) Alleged failures to totally abate a citation within the period of time specified in the citation.

(4) Alleged unwarrantable failure (i.e., aggravated conduct constituting more than ordinary negligence) to comply with a mining safety standard or regulation.

(5) Alleged flagrant violations issued.

(6) Alleged conditions or practices which could reasonably be expected to cause death or serious physical harm before such condition or practice can be abated.

(7) Amounts shown include assessments proposed during the quarter ended March 31, 2025 and do not necessarily relate to the citations or orders reflected in this table. Assessments for citations or orders reflected in this table may be proposed by MSHA after March 31, 2025.

(8) Alleged pattern of violations of mandatory health or safety standards that are of such nature as could have significantly and substantially contributed to the cause and effect of coal or other mine health or safety hazards.

(9) Alleged potential to have a pattern of violations of mandatory health or safety standards that are of such nature as could have significantly and substantially contributed to the cause and effect of coal or other mine health or safety hazards.

(10) This number reflects legal proceedings which remain pending before the Federal Mine Safety and Health Review Commission (the “FMSHRC”) as of March 31, 2025. The pending legal actions may relate to the citations or orders issued by MSHA during the reporting period or to citations or orders issued in prior periods. The FMSHRC has jurisdiction to hear not only challenges to citations, orders, and penalties but also certain complaints by miners. The number of “pending legal actions” reported here reflects the number of contested citations, orders, penalties or complaints, which remain pending as of March 31, 2025.

(11) The legal proceedings reflected in this column of the table are categorized as follows in accordance with the categories established in the Procedural Rules of the FMSHRC:


Mine or Operating Name/MSHA Identification Number	Contests of Citations and Orders (#)	Contests of Proposed Penalties (#)	Complaints for Compensation (#)	Complaints for Discharge, Discrimination or Interference Under Section 105 (#)	Applications for Temporary Relief (#)	Appeals of Judges’ Decisions or Orders (#)
Ceredo Dock / 46-09051	12	12	0	0	0	0
Quincy Dock / 46-07736	0	0	0	0	0	0
Dismal River Terminal / B3121	0	0	0	0	0	0
Jewell Coal Corp / 44-00649	0	0	0	0	0	0
Total	12	12	0	0	0	0

(12) This number reflects legal proceedings initiated before the FMSHRC during the quarter ended March 31, 2025. The number of “initiated legal actions” reported here may not have remained pending as of March 31, 2025.

(13) This number reflects legal proceedings before the FMSHRC that were resolved during the quarter ended March 31, 2025.

Cover - shares	3 Months Ended
Cover - shares	Mar. 31, 2025	Apr. 25, 2025
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2025
Document Transition Report	false
Entity File Number	001-35243
Entity Registrant Name	SUNCOKE ENERGY, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	90-0640593
Entity Address, Address Line One	1011 Warrenville Road
Entity Address, Address Line Two	Suite 600
Entity Address, City or Town	Lisle
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60532
City Area Code	630
Local Phone Number	824-1000
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	SXC
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		84,651,097
Entity Central Index Key	0001514705
Amendment Flag	false
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31

Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenues
Sales and other operating revenue	$ 436.0	$ 488.4
Costs and operating expenses
Cost of products sold and operating expenses	362.3	402.2
Selling, general and administrative expenses	14.7	18.4
Depreciation and amortization expense	28.8	33.3
Total costs and operating expenses	405.8	453.9
Operating income	30.2	34.5
Interest expense, net	5.2	6.3
Income before income tax expense	25.0	28.2
Income tax expense	5.6	7.1
Net income	19.4	21.1
Less: Net income attributable to noncontrolling interests	2.1	1.1
Net income attributable to SunCoke Energy, Inc.	$ 17.3	$ 20.0
Earnings attributable to SunCoke Energy, Inc. per common share:
Basic (in dollars per share)	$ 0.20	$ 0.24
Diluted (in dollars per share)	$ 0.20	$ 0.23
Weighted average number of common shares outstanding:
Basic (in shares)	85.5	85.0
Diluted (in shares)	85.6	85.3

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 19.4	$ 21.1
Other comprehensive income (loss):
Reclassification of prior service benefit and actuarial loss amortization to earnings, net of tax	(0.1)	0.1
Currency translation adjustment	0.3	(0.2)
Comprehensive income	19.6	21.0
Less: Comprehensive income attributable to noncontrolling interests	2.1	1.1
Comprehensive income attributable to SunCoke Energy, Inc.	$ 17.5	$ 19.9

Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Assets
Cash and cash equivalents	$ 193.7	$ 189.6
Receivables, net	80.7	96.6
Inventories	209.7	180.8
Other current assets	11.7	7.6
Total current assets	495.8	474.6
Properties, plants and equipment (net of accumulated depreciation of $1,526.0 million and $1,497.6 million at March 31, 2025 and December 31, 2024, respectively)	1,122.6	1,143.6
Intangible assets, net	28.9	29.2
Deferred charges and other assets	21.1	20.8
Total assets	1,668.4	1,668.2
Liabilities and Equity
Accounts payable	152.7	153.2
Accrued liabilities	35.6	51.6
Interest payable	6.1	0.0
Income tax payable	11.9	1.0
Total current liabilities	206.3	205.8
Long-term debt	492.9	492.3
Accrual for black lung benefits	12.7	12.7
Retirement benefit liabilities	7.2	7.6
Deferred income taxes	194.6	196.8
Asset retirement obligations	17.5	17.2
Other deferred credits and liabilities	22.7	24.8
Total liabilities	953.9	957.2
Equity
Preferred stock, $0.01 par value. Authorized 50,000,000 shares; no issued shares at both March 31, 2025 and December 31, 2024	0.0	0.0
Common stock, $0.01 par value. Authorized 300,000,000 shares; issued 100,055,579 and 99,756,420 shares at March 31, 2025 and December 31, 2024, respectively	1.0	1.0
Treasury stock, 15,404,482 shares at both March 31, 2025 and December 31, 2024	(184.0)	(184.0)
Additional paid-in capital	730.2	732.8
Accumulated other comprehensive loss	(7.5)	(7.7)
Retained earnings	144.9	138.1
Total SunCoke Energy, Inc. stockholders’ equity	684.6	680.2
Noncontrolling interest	29.9	30.8
Total equity	714.5	711.0
Total liabilities and equity	$ 1,668.4	$ 1,668.2

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Accumulated depreciation	$ 1,526.0	$ 1,497.6
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares, issued (in shares)	100,055,579	99,756,420
Treasury stock, shares (in shares)	15,404,482	15,404,482

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash Flows from Operating Activities
Net income	$ 19.4	$ 21.1
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	28.8	33.3
Deferred income tax (benefit) expense	(2.2)	0.4
Share-based compensation expense	0.4	1.3
Changes in working capital pertaining to operating activities:
Receivables, net	15.9	(23.0)
Inventories	(28.9)	(5.6)
Accounts payable	(3.3)	(8.1)
Accrued liabilities	(11.8)	(12.0)
Interest payable	6.1	6.1
Income taxes	10.9	5.9
Other operating activities	(9.5)	(9.4)
Net cash provided by operating activities	25.8	10.0
Cash Flows from Investing Activities
Capital expenditures	(4.9)	(15.5)
Other investing activities	0.3	0.4
Net cash used in investing activities	(4.6)	(15.1)
Cash Flows from Financing Activities
Proceeds from revolving facility	0.0	11.0
Repayment of revolving facility	0.0	(11.0)
Dividends paid	(10.9)	(9.0)
Cash distribution to noncontrolling interests	(3.0)	(2.2)
Other financing activities	(3.2)	(3.7)
Net cash used in financing activities	(17.1)	(14.9)
Net increase (decrease) in cash and cash equivalents	4.1	(20.0)
Cash and cash equivalents at beginning of period	189.6	140.1
Cash and cash equivalents at end of period	193.7	120.1
Supplemental Disclosure of Cash Flow Information
Interest paid	0.0	0.0
Income taxes paid, net of refunds of $3.8 million and zero, respectively	$ (3.2)	$ 0.7

Consolidated Statements of Cash Flows (Parenthetical) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Cash Flows [Abstract]
Tax refunds	$ 3,800,000	$ 0

Consolidated Statements of Equity - USD ($) $ in Millions	Total	Total SunCoke Energy, Inc. Equity	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Non-controlling Interests
Beginning balance (in shares) at Dec. 31, 2023			99,161,446
Beginning balance at Dec. 31, 2023	$ 645.5	$ 614.2	$ 1.0	$ (184.0)	$ 729.8	$ (12.8)	$ 80.2	$ 31.3
Treasury stock, beginning balance (in shares) at Dec. 31, 2023				15,404,482
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	21.1	20.0					20.0	1.1
Reclassifications of prior service benefit and actuarial loss amortization to earnings, net of tax	0.1	0.1				0.1
Currency translation adjustment	(0.2)	(0.2)				(0.2)
Share-based compensation	1.3	1.3			1.3
Share issuances, net of shares withheld for taxes (in shares)			318,520
Share issuances, net of shares withheld for taxes	(3.6)	(3.6)			(3.6)
Dividends	(8.8)	(8.8)					(8.8)
Cash distribution to noncontrolling interests	(2.2)							(2.2)
Ending balance (in shares) at Mar. 31, 2024			99,479,966
Ending balance at Mar. 31, 2024	653.2	623.0	$ 1.0	$ (184.0)	727.5	(12.9)	91.4	30.2
Treasury stock, ending balance (in shares) at Mar. 31, 2024				15,404,482
Beginning balance (in shares) at Dec. 31, 2024			99,756,420
Beginning balance at Dec. 31, 2024	$ 711.0	680.2	$ 1.0	$ (184.0)	732.8	(7.7)	138.1	30.8
Treasury stock, beginning balance (in shares) at Dec. 31, 2024	15,404,482			15,404,482
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 19.4	17.3					17.3	2.1
Reclassifications of prior service benefit and actuarial loss amortization to earnings, net of tax	(0.1)	(0.1)				(0.1)
Currency translation adjustment	0.3	0.3				0.3
Share-based compensation	0.4	0.4			0.4
Share issuances, net of shares withheld for taxes (in shares)			299,159
Share issuances, net of shares withheld for taxes	(3.0)	(3.0)			(3.0)
Dividends	(10.5)	(10.5)					(10.5)
Cash distribution to noncontrolling interests	(3.0)							(3.0)
Ending balance (in shares) at Mar. 31, 2025			100,055,579
Ending balance at Mar. 31, 2025	$ 714.5	$ 684.6	$ 1.0	$ (184.0)	$ 730.2	$ (7.5)	$ 144.9	$ 29.9
Treasury stock, ending balance (in shares) at Mar. 31, 2025	15,404,482			15,404,482

General	3 Months Ended
General	Mar. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General	1. General Description of Business SunCoke Energy, Inc. (“SunCoke Energy,” “SunCoke,” “Company,” “we,” “our” and “us”) is the largest independent producer of high-quality coke in the Americas, as measured by tons of coke produced each year, and has more than 60 years of coke production experience. Coke is produced by heating metallurgical coal in a refractory oven, which releases certain volatile components from the coal, thus transforming the coal into coke. Our coke is primarily used as a principal raw material in the blast furnace steelmaking process as well as in the foundry production of casted iron, and the majority of our sales are derived from blast furnace coke sales made under long-term, take-or-pay agreements. We also sell coke produced utilizing capacity in excess of that reserved for our long-term, take-or-pay agreements to customers in both the export and North American domestic coke markets seeking high-quality product for their blast furnaces. We have designed, developed and built, and we currently own and operate, five cokemaking facilities in the United States (“U.S.”) with collective nameplate capacity to produce approximately 4.2 million tons of blast furnace coke per year. Additionally, we designed and currently operate one cokemaking facility in Brazil under licensing and operating agreements on behalf of ArcelorMittal Brasil S.A. (“ArcelorMittal Brazil”), which has approximately 1.7 million tons of annual cokemaking capacity. Our cokemaking ovens utilize efficient, modern heat recovery technology designed to combust the coal’s volatile components liberated during the cokemaking process and use the resulting heat to create steam or electricity for sale. We also own and operate a logistics business that provides export and domestic material handling and/or mixing services to steel, coke (including some of our domestic cokemaking facilities), electric utility, coal producing and other manufacturing based customers. Our logistics terminals, which are strategically located to reach Gulf Coast, East Coast, Great Lakes and international ports, have the collective capacity to mix and/or transload more than 40 million tons of coal and other products annually and have storage capacity of approximately 3 million tons. Basis of Presentation The accompanying unaudited consolidated financial statements included herein have been prepared in accordance with accounting principles generally accepted in the U.S. (“GAAP”) for interim reporting. Certain information and disclosures normally included in financial statements have been omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). In management’s opinion, the financial statements reflect all adjustments, which are of a normal recurring nature, necessary for a fair presentation of the results of operations, financial position and cash flows for the periods presented. The results of operations for the period ended March 31, 2025 are not necessarily indicative of the operating results expected for the entire year. These unaudited interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2024.

Inventories

3 Months Ended

Mar. 31, 2025

Inventory Disclosure [Abstract]

Inventories

2. Inventories

The components of inventories were as follows:


	March 31, 2025		December 31, 2024

	(Dollars in millions)
Coal	$	136.4	$	109.3
Coke	15.6		13.9
Materials, supplies and other	57.7		57.6
Total inventories	$	209.7	$	180.8

Intangible Assets

3 Months Ended

Mar. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

3. Intangible Assets


		March 31, 2025						December 31, 2024
	Weighted - Average Remaining Amortization Years	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net

		(Dollars in millions)
Permits	17	31.7		7.6		24.1		31.7		7.3		24.4
Other	25	1.6		0.2		1.4		1.6		0.2		1.4
Total		$	33.3	$	7.8	$	25.5	$	33.3	$	7.5	$	25.8

Total amortization expense for intangible assets subject to amortization was $0.3 million and $0.5 million for the three months ended March 31, 2025 and 2024, respectively.

Income Taxes

3 Months Ended

Mar. 31, 2025

Income Tax Disclosure [Abstract]

Income Taxes

4. Income Taxes

At the end of each interim period, we make our best estimate of the annual effective tax rate and the impact of discrete items, if any, and adjust the rate as necessary.


	Three Months Ended March 31,
	2025			2024

	(Dollars in millions)
Income before income tax expense	$	25.0		$	28.2
Income tax expense	5.6			7.1
Effective tax rate	22.4		%	25.2		%

Income taxes recorded during the three months ended March 31, 2025 and 2024 included immaterial discrete items.

Accrued Liabilities

3 Months Ended

Mar. 31, 2025

Payables and Accruals [Abstract]

Accrued Liabilities

5. Accrued Liabilities

Accrued liabilities consisted of the following:


	March 31, 2025		December 31, 2024

	(Dollars in millions)
Accrued benefits	$	12.6	$	28.7
Current portion of postretirement benefit obligation	1.0		1.0
Other taxes payable	12.7		10.2
Current portion of black lung liability	1.1		1.0
Lease liabilities	2.8		2.7
Other	5.4		8.0
Total accrued liabilities	$	35.6	$	51.6

Debt

3 Months Ended

Mar. 31, 2025

Debt Disclosure [Abstract]

Debt

6. Debt

Total debt consisted of the following:


	March 31, 2025		December 31, 2024

	(Dollars in millions)
4.875 percent senior notes, due 2029 (“2029 Senior Notes”)	$	500.0	$	500.0
$350.0 revolving credit facility, due 2026 (“Revolving Facility”)	—		—
Total borrowings	$	500.0	$	500.0
Debt issuance costs	(7.1)		(7.7)
Total debt	$	492.9	$	492.3

Revolving Facility

Covenants

Commitments and Contingent Liabilities	3 Months Ended
Commitments and Contingent Liabilities	Mar. 31, 2025
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	7. Commitments and Contingent Liabilities Legal Matters Between 2005 and 2012, the EPA and the Ohio Environmental Protection Agency (“OEPA”) issued Notices of Violations (“NOVs”), alleging violations of air emission operating permits for our Haverhill and Granite City cokemaking facilities. We worked in a cooperative manner with the EPA, the OEPA and the Illinois Environmental Protection Agency to address the allegations and, in November 2014, entered into a consent decree with these parties in federal district court in the Southern District of Illinois. The consent decree included a civil penalty paid in December 2014, and a commitment to undertake capital projects to improve reliability and enhance environmental performance. On March 21, 2025, the United States filed a motion to terminate the consent decree for the Haverhill facility, which was granted by the court on March 25, 2025. Therefore, the consent decree is no longer in effect for Haverhill. The Company is a party to certain pending and threatened claims, including matters related to commercial disputes, employment claims, personal injury claims, common law tort claims, and environmental claims. Although the ultimate outcome of these claims cannot be ascertained at this time, it is reasonably possible that some portion of these claims could be resolved unfavorably to the Company. Management of the Company believes that any liability which may arise from these claims would likely not have a material adverse impact on our consolidated financial statements. SunCoke's threshold for disclosing material environmental legal proceedings involving a government authority where potential monetary sanctions are involved is $1 million.

Share-Based Compensation

3 Months Ended

Mar. 31, 2025

Share-Based Payment Arrangement [Abstract]

Share-Based Compensation

8. Share-Based Compensation

Equity Classified Awards

Restricted Stock Units Settled in Shares

Performance Share Units


	Shares	Weighted Average Grant Date Fair Value per Unit
PSUs(1)(2)	99,589	$	9.32

Liability Classified Awards

Restricted Stock Units Settled in Cash

The Cash RSUs liability is adjusted based on the closing price of our common stock at the end of each quarterly period and was $0.8 million at March 31, 2025 and $2.6 million at December 31, 2024.

Cash Incentive Awards

Summary of Share-Based Compensation Expense

Below is a summary of the compensation expense, unrecognized compensation costs, and the period for which the unrecognized compensation cost is expected to be recognized over:


	Three Months Ended March 31,
	2025		2024				March 31, 2025

	Compensation Expense(1)				Unrecognized Compensation Cost	Weighted Average Remaining Recognition Period
	(Dollars in millions)				(Dollars in millions)	(Years)
Equity Awards:

RSUs	$	0.2	$	0.4			$	2.7	2.2
PSUs	0.2		0.9				1.6		2.2
Total equity awards	$	0.4	$	1.3
Liability Awards:
Cash RSUs	$	—	$	0.5			$	2.3	1.8
Cash incentive award	0.4		1.0				2.9		2.2
Total liability awards	$	0.4	$	1.5

(1)Compensation expense recognized by the Company is included in selling, general and administrative expenses on the Consolidated Statements of Income.

Earnings per Share

3 Months Ended

Mar. 31, 2025

Earnings Per Share [Abstract]

Earnings per Share

9. Earnings per Share

The following table sets forth the reconciliation of the weighted-average number of common shares used to compute basic EPS to those used to compute diluted EPS:


	Three Months Ended March 31,
	2025	2024

	(Shares in millions)
Weighted-average number of common shares outstanding-basic	85.5	85.0
Add: Effect of dilutive share-based compensation awards	0.1	0.3
Weighted-average number of shares-diluted	85.6	85.3

The following table shows equity awards that are excluded from the computation of diluted EPS as the shares would have been anti-dilutive:


	Three Months Ended March 31,
	2025	2024

	(Shares in millions)
Stock options	0.3	0.6

Performance share units	0.1	—
Total	0.4	0.6

Fair Value Measurement	3 Months Ended
Fair Value Measurement	Mar. 31, 2025
Fair Value Disclosures [Abstract]
Fair Value Measurement	10. Fair Value Measurement The Company measures certain financial and non-financial assets and liabilities at fair value on a recurring basis. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants on the measurement date. Fair value disclosures are reflected in a three-level hierarchy, maximizing the use of observable inputs and minimizing the use of unobservable inputs. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability on the measurement date. The three levels are defined as follows: •Level 1 - inputs to the valuation methodology are quoted prices (unadjusted) for an identical asset or liability in an active market. •Level 2 - inputs to the valuation methodology include quoted prices for a similar asset or liability in an active market or model-derived valuations in which all significant inputs are observable for substantially the full term of the asset or liability. •Level 3 - inputs to the valuation methodology are unobservable and significant to the fair value measurement of the asset or liability. Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis Cash and Cash Equivalents Certain assets and liabilities are measured at fair value on a recurring basis. The Company's cash and cash equivalents were measured at fair value at March 31, 2025 and December 31, 2024 based on quoted prices in active markets for identical assets. These inputs are classified as Level 1 within the valuation hierarchy. Certain Financial Assets and Liabilities not Measured at Fair Value At March 31, 2025 and December 31, 2024, the fair value of the Company’s total debt was estimated to be $456.7 million and $454.9 million, respectively, compared to a carrying amount of $500.0 million at both periods. The fair value was estimated by management based upon estimates of debt pricing provided by financial institutions, which are considered Level 2 inputs.

Revenue from Contracts with Customers

3 Months Ended

Mar. 31, 2025

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

11. Revenue from Contracts with Customers

Cokemaking

Revenues on all coke sales are recognized when performance obligations to our customers are satisfied in an amount that reflects the consideration that we expect to receive in exchange for the coke.

Logistics

Disaggregated Sales and Other Operating Revenue

The following table provides disaggregated sales and other operating revenue by product or service, excluding intersegment revenues:


	Three Months Ended March 31,
	2025		2024

	(Dollars in millions)
Sales and other operating revenue:
Cokemaking	$	391.3	$	446.7
Energy	12.8		11.9
Logistics	22.1		20.3
Operating and licensing fees	7.8		8.3
Other	2.0		1.2
Sales and other operating revenue	$	436.0	$	488.4

The following tables provide disaggregated sales and other operating revenue by customer:


	Three Months Ended March 31,
	2025		2024

	(Dollars in millions)
Sales and other operating revenue:
Cliffs Steel	$	299.3	$	317.3
U.S. Steel	60.0		72.0
Other	76.7		99.1
Sales and other operating revenue	$	436.0	$	488.4

Business Segment Information

3 Months Ended

Mar. 31, 2025

Segment Reporting [Abstract]

Business Segment Information

12. Business Segment Information

Segment assets are those assets utilized within a specific segment.


	Three Months Ended March 31, 2025
	(Dollars in millions)
	Domestic Coke		Brazil Coke		Logistics		Total
Sales and other operating revenue	$	405.8	$	7.8	$	22.4	$	436.0
Intersegment revenues	—		—		5.6		5.6
Net revenues	405.8		7.8		28.0		441.6

Reconciliation of revenue
Elimination of intersegment revenues							(5.6)
Total consolidated revenues							436.0

Less:(1)
Operating and maintenance expense	71.1		4.8		14.0
Cost of products sold and other expenses(2)	277.9		—		—
Selling, general and administrative expenses	6.9		0.7		0.3
Adjusted EBITDA reportable segments	49.9		2.3		13.7		65.9
Depreciation and amortization expense							28.8
Interest expense, net(3)							5.2
Other corporate expenses(4)							6.9
Income before income tax expense							$	25.0

(1)The significant expense categories and amounts align with segment-level information that is regularly provided to the CODM.

(2)Cost of products sold and other expenses includes coal and transportation costs.

(3)Interest expense, net of $5.2 million reflects (i) consolidated interest expense of $6.8 million and (ii) consolidated interest income of $1.6 million.

(4)Other corporate expenses represents business expenses not allocated to the Company’s reportable segments and are included in Corporate, which is not a reportable segment.


	Three Months Ended March 31, 2024
	(Dollars in millions)
	Domestic Coke		Brazil Coke		Logistics		Total
Sales and other operating revenue	$	459.5	$	8.3	$	20.6	$	488.4
Intersegment revenues	—		—		5.9		5.9
Net revenues	459.5		8.3		26.5		494.3

Reconciliation of revenue
Elimination of intersegment revenues							(5.9)
Total consolidated revenues							488.4

Less:(1)
Operating and maintenance expense	71.5		5.1		13.0
Cost of products sold and other expenses(2)	318.7		—		—
Selling, general and administrative expenses	7.9		0.8		0.5
Adjusted EBITDA reportable segments	61.4		2.4		13.0		76.8
Depreciation and amortization expense							33.3
Interest expense, net(3)							6.3
Other corporate expenses(4)							9.0
Income before income tax expense							$	28.2

(1)The significant expense categories and amounts align with segment-level information that is regularly provided to the CODM.

(2)Cost of products sold and other expenses includes coal and transportation costs.

(3)Interest expense, net of $6.3 million reflects (i) consolidated interest expense of $7.2 million and (ii) consolidated interest income of $0.9 million.

(4)Other corporate expenses represents business expenses not allocated to the Company’s reportable segments and are included in Corporate, which is not a reportable segment.

The following table sets forth the Company’s depreciation and amortization expense as well as its capital expenditures:


	Three Months Ended March 31,
	2025		2024

	(Dollars in millions)
Depreciation and amortization expense:
Domestic Coke	$	25.1	$	29.9
Logistics	3.1		3.2
Brazil Coke	0.1		0.1
Total reportable segments	$	28.3	$	33.2
Corporate and Other	0.5		0.1
Total depreciation and amortization expense	$	28.8	$	33.3

Capital expenditures:
Domestic Coke	$	2.1	$	14.5
Logistics	2.7		0.6
Brazil Coke	0.1		—
Total reportable segments	$	4.9	$	15.1
Corporate and Other	—		0.4
Total capital expenditures	$	4.9	$	15.5

The following table sets forth the Company's segment assets:


	March 31, 2025		December 31, 2024

	(Dollars in millions)
Segment assets:
Domestic Coke	$	1,335.1	$	1,351.1
Logistics	161.8		158.2
Brazil Coke	11.3		10.2
Total reportable segments	$	1,508.2	$	1,519.5
Corporate and Other	160.2		148.7
Total assets	$	1,668.4	$	1,668.2

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Millions	Mar. 31, 2025	Mar. 31, 2024
Pay vs Performance Disclosure
Net Income (Loss)	$ 17.3	$ 20.0

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Mar. 31, 2025
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

General (Policies)	3 Months Ended
General (Policies)	Mar. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements included herein have been prepared in accordance with accounting principles generally accepted in the U.S. (“GAAP”) for interim reporting. Certain information and disclosures normally included in financial statements have been omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). In management’s opinion, the financial statements reflect all adjustments, which are of a normal recurring nature, necessary for a fair presentation of the results of operations, financial position and cash flows for the periods presented. The results of operations for the period ended March 31, 2025 are not necessarily indicative of the operating results expected for the entire year. These unaudited interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2024.

Inventories (Tables)

3 Months Ended

Mar. 31, 2025

Inventory Disclosure [Abstract]

Schedule of Components of Inventories

The components of inventories were as follows:


	March 31, 2025		December 31, 2024

	(Dollars in millions)
Coal	$	136.4	$	109.3
Coke	15.6		13.9
Materials, supplies and other	57.7		57.6
Total inventories	$	209.7	$	180.8

Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets


		March 31, 2025						December 31, 2024
	Weighted - Average Remaining Amortization Years	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net

		(Dollars in millions)
Permits	17	31.7		7.6		24.1		31.7		7.3		24.4
Other	25	1.6		0.2		1.4		1.6		0.2		1.4
Total		$	33.3	$	7.8	$	25.5	$	33.3	$	7.5	$	25.8

Income Taxes (Tables)

3 Months Ended

Mar. 31, 2025

Income Tax Disclosure [Abstract]

Schedule of Effective Tax Rate

At the end of each interim period, we make our best estimate of the annual effective tax rate and the impact of discrete items, if any, and adjust the rate as necessary.


	Three Months Ended March 31,
	2025			2024

	(Dollars in millions)
Income before income tax expense	$	25.0		$	28.2
Income tax expense	5.6			7.1
Effective tax rate	22.4		%	25.2		%

Accrued Liabilities (Tables)

3 Months Ended

Mar. 31, 2025

Payables and Accruals [Abstract]

Schedule of Accrued Liabilities

Accrued liabilities consisted of the following:


	March 31, 2025		December 31, 2024

	(Dollars in millions)
Accrued benefits	$	12.6	$	28.7
Current portion of postretirement benefit obligation	1.0		1.0
Other taxes payable	12.7		10.2
Current portion of black lung liability	1.1		1.0
Lease liabilities	2.8		2.7
Other	5.4		8.0
Total accrued liabilities	$	35.6	$	51.6

Debt (Tables)

3 Months Ended

Mar. 31, 2025

Debt Disclosure [Abstract]

Schedule of Total Debt

Total debt consisted of the following:


	March 31, 2025		December 31, 2024

	(Dollars in millions)
4.875 percent senior notes, due 2029 (“2029 Senior Notes”)	$	500.0	$	500.0
$350.0 revolving credit facility, due 2026 (“Revolving Facility”)	—		—
Total borrowings	$	500.0	$	500.0
Debt issuance costs	(7.1)		(7.7)
Total debt	$	492.9	$	492.3

Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2025

Share-Based Payment Arrangement [Abstract]

Schedule of Share-Based Compensation of PSU Activity

The Company granted the following PSUs:


	Shares	Weighted Average Grant Date Fair Value per Unit
PSUs(1)(2)	99,589	$	9.32

Schedule of Compensation Expense, Unrecognized Compensation Costs, and Unrecognized Compensation Cost is Expected to be Recognized

Below is a summary of the compensation expense, unrecognized compensation costs, and the period for which the unrecognized compensation cost is expected to be recognized over:


	Three Months Ended March 31,
	2025		2024				March 31, 2025

	Compensation Expense(1)				Unrecognized Compensation Cost	Weighted Average Remaining Recognition Period
	(Dollars in millions)				(Dollars in millions)	(Years)
Equity Awards:

RSUs	$	0.2	$	0.4			$	2.7	2.2
PSUs	0.2		0.9				1.6		2.2
Total equity awards	$	0.4	$	1.3
Liability Awards:
Cash RSUs	$	—	$	0.5			$	2.3	1.8
Cash incentive award	0.4		1.0				2.9		2.2
Total liability awards	$	0.4	$	1.5

(1)Compensation expense recognized by the Company is included in selling, general and administrative expenses on the Consolidated Statements of Income.

Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2025

Earnings Per Share [Abstract]

Schedule of Weighted-Average Number of Common Shares Used to Compute Basic EPS and Diluted EPS

The following table sets forth the reconciliation of the weighted-average number of common shares used to compute basic EPS to those used to compute diluted EPS:


	Three Months Ended March 31,
	2025	2024

	(Shares in millions)
Weighted-average number of common shares outstanding-basic	85.5	85.0
Add: Effect of dilutive share-based compensation awards	0.1	0.3
Weighted-average number of shares-diluted	85.6	85.3

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following table shows equity awards that are excluded from the computation of diluted EPS as the shares would have been anti-dilutive:


	Three Months Ended March 31,
	2025	2024

	(Shares in millions)
Stock options	0.3	0.6

Performance share units	0.1	—
Total	0.4	0.6

Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2025

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

The following table provides disaggregated sales and other operating revenue by product or service, excluding intersegment revenues:


	Three Months Ended March 31,
	2025		2024

	(Dollars in millions)
Sales and other operating revenue:
Cokemaking	$	391.3	$	446.7
Energy	12.8		11.9
Logistics	22.1		20.3
Operating and licensing fees	7.8		8.3
Other	2.0		1.2
Sales and other operating revenue	$	436.0	$	488.4

The following tables provide disaggregated sales and other operating revenue by customer:


	Three Months Ended March 31,
	2025		2024

	(Dollars in millions)
Sales and other operating revenue:
Cliffs Steel	$	299.3	$	317.3
U.S. Steel	60.0		72.0
Other	76.7		99.1
Sales and other operating revenue	$	436.0	$	488.4

Business Segment Information (Tables)

3 Months Ended

Mar. 31, 2025

Segment Reporting [Abstract]

Schedule of Adjusted EBITDA Reportable Segments and Depreciation and Amortization Expense and Capital Expenditures and Segment Assets


	Three Months Ended March 31, 2025
	(Dollars in millions)
	Domestic Coke		Brazil Coke		Logistics		Total
Sales and other operating revenue	$	405.8	$	7.8	$	22.4	$	436.0
Intersegment revenues	—		—		5.6		5.6
Net revenues	405.8		7.8		28.0		441.6

Reconciliation of revenue
Elimination of intersegment revenues							(5.6)
Total consolidated revenues							436.0

Less:(1)
Operating and maintenance expense	71.1		4.8		14.0
Cost of products sold and other expenses(2)	277.9		—		—
Selling, general and administrative expenses	6.9		0.7		0.3
Adjusted EBITDA reportable segments	49.9		2.3		13.7		65.9
Depreciation and amortization expense							28.8
Interest expense, net(3)							5.2
Other corporate expenses(4)							6.9
Income before income tax expense							$	25.0

(1)The significant expense categories and amounts align with segment-level information that is regularly provided to the CODM.

(2)Cost of products sold and other expenses includes coal and transportation costs.

(3)Interest expense, net of $5.2 million reflects (i) consolidated interest expense of $6.8 million and (ii) consolidated interest income of $1.6 million.

(4)Other corporate expenses represents business expenses not allocated to the Company’s reportable segments and are included in Corporate, which is not a reportable segment.


	Three Months Ended March 31, 2024
	(Dollars in millions)
	Domestic Coke		Brazil Coke		Logistics		Total
Sales and other operating revenue	$	459.5	$	8.3	$	20.6	$	488.4
Intersegment revenues	—		—		5.9		5.9
Net revenues	459.5		8.3		26.5		494.3

Reconciliation of revenue
Elimination of intersegment revenues							(5.9)
Total consolidated revenues							488.4

Less:(1)
Operating and maintenance expense	71.5		5.1		13.0
Cost of products sold and other expenses(2)	318.7		—		—
Selling, general and administrative expenses	7.9		0.8		0.5
Adjusted EBITDA reportable segments	61.4		2.4		13.0		76.8
Depreciation and amortization expense							33.3
Interest expense, net(3)							6.3
Other corporate expenses(4)							9.0
Income before income tax expense							$	28.2

(1)The significant expense categories and amounts align with segment-level information that is regularly provided to the CODM.

(2)Cost of products sold and other expenses includes coal and transportation costs.

(3)Interest expense, net of $6.3 million reflects (i) consolidated interest expense of $7.2 million and (ii) consolidated interest income of $0.9 million.

(4)Other corporate expenses represents business expenses not allocated to the Company’s reportable segments and are included in Corporate, which is not a reportable segment.

The following table sets forth the Company’s depreciation and amortization expense as well as its capital expenditures:


	Three Months Ended March 31,
	2025		2024

	(Dollars in millions)
Depreciation and amortization expense:
Domestic Coke	$	25.1	$	29.9
Logistics	3.1		3.2
Brazil Coke	0.1		0.1
Total reportable segments	$	28.3	$	33.2
Corporate and Other	0.5		0.1
Total depreciation and amortization expense	$	28.8	$	33.3

Capital expenditures:
Domestic Coke	$	2.1	$	14.5
Logistics	2.7		0.6
Brazil Coke	0.1		—
Total reportable segments	$	4.9	$	15.1
Corporate and Other	—		0.4
Total capital expenditures	$	4.9	$	15.5

The following table sets forth the Company's segment assets:


	March 31, 2025		December 31, 2024

	(Dollars in millions)
Segment assets:
Domestic Coke	$	1,335.1	$	1,351.1
Logistics	161.8		158.2
Brazil Coke	11.3		10.2
Total reportable segments	$	1,508.2	$	1,519.5
Corporate and Other	160.2		148.7
Total assets	$	1,668.4	$	1,668.2

General (Details) T in Millions	3 Months Ended
General (Details) T in Millions	Mar. 31, 2025 facility T
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]
Coke production experience (more than)	60 years
United States
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]
Number of facilities \| facility	5
Coke making capacity (in tons)	4.2
Brazil
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]
Number of facilities \| facility	1
Coke making capacity (in tons)	1.7
Gulf Coast, East Coast, Great Lakes, and International Ports
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]
Coal handling capacity, more than (in tons)	40.0
Coal storage capacity (in tons)	3.0

Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Inventory Disclosure [Abstract]
Coal	$ 136.4	$ 109.3
Coke	15.6	13.9
Materials, supplies and other	57.7	57.6
Total inventories	$ 209.7	$ 180.8

Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Goodwill [Line Items]
Total amortization expense of intangible assets	$ 0.3	$ 0.5
Operating Segments \| Domestic Coke
Goodwill [Line Items]
Intangible assets, net	$ 3.4		$ 3.4

Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 33.3	$ 33.3
Accumulated Amortization	7.8	7.5
Net	$ 25.5	25.8
Permits
Finite-Lived Intangible Assets [Line Items]
Weighted - Average Remaining Amortization Years	17 years
Gross Carrying Amount	$ 31.7	31.7
Accumulated Amortization	7.6	7.3
Net	$ 24.1	24.4
Other
Finite-Lived Intangible Assets [Line Items]
Weighted - Average Remaining Amortization Years	25 years
Gross Carrying Amount	$ 1.6	1.6
Accumulated Amortization	0.2	0.2
Net	$ 1.4	$ 1.4

Income Taxes - Schedule of Effective Tax Rate (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Income before income tax expense	$ 25.0	$ 28.2
Income tax expense	$ 5.6	$ 7.1
Effective tax rate	22.40%	25.20%

Income Taxes - Narrative (Details)	3 Months Ended
Income Taxes - Narrative (Details)	Mar. 31, 2025	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Effective income tax rate before impact of discrete items (as a percent)	22.40%	25.20%

Accrued Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Payables and Accruals [Abstract]
Accrued benefits	$ 12.6	$ 28.7
Current portion of postretirement benefit obligation	1.0	1.0
Other taxes payable	12.7	10.2
Current portion of black lung liability	1.1	1.0
Lease liabilities	2.8	2.7
Other	5.4	8.0
Total accrued liabilities	$ 35.6	$ 51.6

Debt - Schedule of Total Debt (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Total borrowings	$ 500.0	$ 500.0
Debt issuance costs	(7.1)	(7.7)
Total debt	$ 492.9	492.3
4.875 percent senior notes, due 2029 (“2029 Senior Notes”) \| Senior Notes
Debt Instrument [Line Items]
Interest rate on senior notes (as a percent)	4.875%
Total borrowings	$ 500.0	500.0
$350.0 revolving credit facility, due 2026 (“Revolving Facility”) \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Principal amount of term loan	350.0
Total borrowings	$ 0.0	$ 0.0

Debt - Revolving Facility (Narrative) (Details) - USD ($)	Mar. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Outstanding balance	$ 500,000,000.0	$ 500,000,000.0
Revolving Credit Facility \| SunCoke Revolving Credit Facility, Due 2024 \| Line of Credit
Debt Instrument [Line Items]
Outstanding balance	0
Remaining borrowing capacity	350,000,000.0
Letter of Credit \| SunCoke Revolving Credit Facility, Due 2024 \| Line of Credit
Debt Instrument [Line Items]
Outstanding balance	$ 9,600,000

Debt - Covenants (Narrative) (Details) - Credit Agreement and Partner Revolver $ in Millions	Mar. 31, 2025 USD ($)
Line of Credit Facility [Line Items]
Maximum consolidated net leverage ratio	4.50
Minimum consolidated interest coverage ratio	2.50
SunCoke Energy Partners, L.P.
Line of Credit Facility [Line Items]
Cross default covenant threshold	$ 35.0

Commitments and Contingent Liabilities (Details) $ in Millions	Mar. 31, 2025 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Threshold for disclosing material environmental legal proceedings	$ 1

Share-Based Compensation - Narrative (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($) installment $ / shares shares	Dec. 31, 2024 USD ($)
RSUs
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Share based payment award, grants in period (in shares) \| shares	199,178
Fair value grant (in dollars per share) \| $ / shares	$ 9.20
Number of annual installment in which stock option exercisable (in installments) \| installment	3
Period from grant date for annual installment (in years)	1 year
PSUs \| Minimum
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Percent of original award granted	25.00%
PSUs \| Maximum
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Percent of original award granted	240.00%
Restricted Stock Units Settled in Cash
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Share based payment award, grants in period (in shares) \| shares	157,988
Fair value grant (in dollars per share) \| $ / shares	$ 9.20
Number of annual installment in which stock option exercisable (in installments) \| installment	3
Period from grant date for annual installment (in years)	1 year
Award liability	$ 0.8	$ 2.6
Cash incentive award \| Suncoke LTCIP
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Award liability	3.5	$ 6.8
Grant date fair value of award	$ 1.8
Percent of award allocation	50.00%
Measurement period	3 years

Share-Based Compensation - Schedule of Share-Based Compensation of PSU Activity (Details) - PSUs - Suncoke LTPEP	3 Months Ended
	Mar. 31, 2025 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
PSUs, shares (in shares) \| shares	99,589
PSUs, weighted average grant date fair value per unit (in dollars per share) \| $ / shares	$ 9.32
Pre-Tax Return of Capital for Coke and Coal Logistics Businesses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of award allocation	50.00%
Measurement period	3 years
TSR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Measurement period	3 years
TSR \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Measurement results payout percentage	80.00%
TSR \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Measurement results payout percentage	120.00%

Share-Based Compensation - Schedule of Compensation Expense, Unrecognized Compensation Costs, and Unrecognized Compensation Cost is Expected to be Recognized (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Total equity awards \| Selling, General and Administrative Expenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Compensation expense	$ 0.4	$ 1.3
RSUs
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Unrecognized Compensation Cost	$ 2.7
Weighted Average Remaining Recognition Period	2 years 2 months 12 days
RSUs \| Selling, General and Administrative Expenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Compensation expense	$ 0.2	0.4
PSUs
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Unrecognized Compensation Cost	$ 1.6
Weighted Average Remaining Recognition Period	2 years 2 months 12 days
PSUs \| Selling, General and Administrative Expenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Compensation expense	$ 0.2	0.9
Total liability awards \| Selling, General and Administrative Expenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Compensation expense	0.4	1.5
Cash RSUs
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Unrecognized Compensation Cost	$ 2.3
Weighted Average Remaining Recognition Period	1 year 9 months 18 days
Cash RSUs \| Selling, General and Administrative Expenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Compensation expense	$ 0.0	0.5
Cash incentive award \| Suncoke LTCIP
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Unrecognized Compensation Cost	$ 2.9
Weighted Average Remaining Recognition Period	2 years 2 months 12 days
Cash incentive award \| Selling, General and Administrative Expenses \| Suncoke LTCIP
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Compensation expense	$ 0.4	$ 1.0

Earnings per Share - Schedule of Weighted-Average Number of Common Shares Used to Compute Basic EPS and Diluted EPS (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Earnings Per Share [Abstract]
Weighted-average number of common shares outstanding-basic (in shares)	85.5	85.0
Add: Effect of dilutive share-based compensation awards (in shares)	0.1	0.3
Weighted-average number of shares-diluted (in shares)	85.6	85.3

Earnings per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential dilutive effect excluded from the computation of diluted weighted-average shares outstanding (in shares)	0.4	0.6
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential dilutive effect excluded from the computation of diluted weighted-average shares outstanding (in shares)	0.3	0.6
Performance share units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential dilutive effect excluded from the computation of diluted weighted-average shares outstanding (in shares)	0.1	0.0

Fair Value Measurement (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Fair Value Disclosures [Abstract]
Fair value of long-term debt	$ 456.7	$ 454.9
Outstanding balance	$ 500.0	$ 500.0

Revenue from Contracts with Customers - Narrative (Details) T in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($) performance_obligation T
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Number of performance obligations in handling and mixing services \| performance_obligation	2
Cokemaking
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unsatisfied performance obligations capacity (in tons) \| T	18.7
Average remaining term	9 years
Logistics
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Average remaining term	3 years
Performance obligation amount \| $	$ 53.4

Revenue from Contracts with Customers - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Sales and other operating revenue	$ 436.0	$ 488.4
Cliffs Steel
Disaggregation of Revenue [Line Items]
Sales and other operating revenue	299.3	317.3
U.S. Steel
Disaggregation of Revenue [Line Items]
Sales and other operating revenue	60.0	72.0
Other
Disaggregation of Revenue [Line Items]
Sales and other operating revenue	76.7	99.1
Cokemaking
Disaggregation of Revenue [Line Items]
Sales and other operating revenue	391.3	446.7
Energy
Disaggregation of Revenue [Line Items]
Sales and other operating revenue	12.8	11.9
Logistics
Disaggregation of Revenue [Line Items]
Sales and other operating revenue	22.1	20.3
Operating and licensing fees
Disaggregation of Revenue [Line Items]
Sales and other operating revenue	7.8	8.3
Other
Disaggregation of Revenue [Line Items]
Sales and other operating revenue	$ 2.0	$ 1.2

Business Segment Information - Narrative (Details)	3 Months Ended
Business Segment Information - Narrative (Details)	Mar. 31, 2025 segment
Segment Reporting [Abstract]
Number of reportable segments	3

Business Segment Information - Schedule of Adjusted EBITDA Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Sales and other operating revenue	$ (436.0)	$ (488.4)
Less:
Selling, general and administrative expenses	14.7	18.4
Depreciation and amortization expense	28.8	33.3
Interest expense, net	5.2	6.3
Income before income tax expense	25.0	28.2
Interest expense	6.8	7.2
Interest income	1.6	0.9
Elimination
Segment Reporting Information [Line Items]
Sales and other operating revenue	5.6	5.9
Operating Segments
Segment Reporting Information [Line Items]
Sales and other operating revenue	(441.6)	(494.3)
Less:
Adjusted EBITDA reportable segments	65.9	76.8
Depreciation and amortization expense	28.3	33.2
Corporate and Other
Less:
Other corporate expenses	6.9	9.0
Domestic Coke
Segment Reporting Information [Line Items]
Sales and other operating revenue	(405.8)	(459.5)
Domestic Coke \| Elimination
Segment Reporting Information [Line Items]
Sales and other operating revenue	0.0	0.0
Domestic Coke \| Operating Segments
Segment Reporting Information [Line Items]
Sales and other operating revenue	(405.8)	(459.5)
Less:
Operating and maintenance expense	71.1	71.5
Cost of products sold and other expenses	277.9	318.7
Selling, general and administrative expenses	6.9	7.9
Adjusted EBITDA reportable segments	49.9	61.4
Depreciation and amortization expense	25.1	29.9
Logistics
Segment Reporting Information [Line Items]
Sales and other operating revenue	(22.4)	(20.6)
Logistics \| Elimination
Segment Reporting Information [Line Items]
Sales and other operating revenue	5.6	5.9
Logistics \| Operating Segments
Segment Reporting Information [Line Items]
Sales and other operating revenue	(28.0)	(26.5)
Less:
Operating and maintenance expense	14.0	13.0
Cost of products sold and other expenses	0.0	0.0
Selling, general and administrative expenses	0.3	0.5
Adjusted EBITDA reportable segments	13.7	13.0
Depreciation and amortization expense	3.1	3.2
Brazil Coke
Segment Reporting Information [Line Items]
Sales and other operating revenue	(7.8)	(8.3)
Brazil Coke \| Elimination
Segment Reporting Information [Line Items]
Sales and other operating revenue	0.0	0.0
Brazil Coke \| Operating Segments
Segment Reporting Information [Line Items]
Sales and other operating revenue	(7.8)	(8.3)
Less:
Operating and maintenance expense	4.8	5.1
Cost of products sold and other expenses	0.0	0.0
Selling, general and administrative expenses	0.7	0.8
Adjusted EBITDA reportable segments	2.3	2.4
Depreciation and amortization expense	$ 0.1	$ 0.1

Business Segment Information - Schedule of Depreciation and Amortization Expense and Capital Expenditures (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Depreciation and amortization expense	$ 28.8	$ 33.3
Capital expenditures	4.9	15.5
Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization expense	28.3	33.2
Capital expenditures	4.9	15.1
Operating Segments \| Domestic Coke
Segment Reporting Information [Line Items]
Depreciation and amortization expense	25.1	29.9
Capital expenditures	2.1	14.5
Operating Segments \| Logistics
Segment Reporting Information [Line Items]
Depreciation and amortization expense	3.1	3.2
Capital expenditures	2.7	0.6
Operating Segments \| Brazil Coke
Segment Reporting Information [Line Items]
Depreciation and amortization expense	0.1	0.1
Capital expenditures	0.1	0.0
Corporate and Other
Segment Reporting Information [Line Items]
Depreciation and amortization expense	0.5	0.1
Capital expenditures	$ 0.0	$ 0.4

Business Segment Information - Schedule of Segment Assets (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Segment Reporting Information [Line Items]
Total assets	$ 1,668.4	$ 1,668.2
Operating Segments
Segment Reporting Information [Line Items]
Total assets	1,508.2	1,519.5
Operating Segments \| Domestic Coke
Segment Reporting Information [Line Items]
Total assets	1,335.1	1,351.1
Operating Segments \| Logistics
Segment Reporting Information [Line Items]
Total assets	161.8	158.2
Operating Segments \| Brazil Coke
Segment Reporting Information [Line Items]
Total assets	11.3	10.2
Corporate and Other
Segment Reporting Information [Line Items]
Total assets	$ 160.2	$ 148.7

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