CLEVELAND-CLIFFS INC.

For the period ended Mar 31, 2026. Filed Apr 21, 2026.

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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Mar 31, 2026 · Filed Apr 21, 2026

CLF$12.26+7.0%Stored close · as of Nov 9, 2026

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Contents

Item 6. EXHIBITS

All documents referenced below have been filed pursuant to the Securities Exchange Act of 1934 by Cleveland-Cliffs Inc., file number 1-08944, unless otherwise indicated.

ExhibitNumber	Exhibit
10.1	* Form of Cleveland-Cliffs Inc. 2021 Equity and Incentive Compensation Plan Restricted Stock Units Award Memorandum and Restricted Stock Units Award Agreement (2026 RSUs) (filed herewith).
10.2	* Form of Cleveland-Cliffs Inc. 2021 Equity and Incentive Compensation Plan Restricted Stock Units Award Memorandum and Restricted Stock Units Award Agreement (2026 RSUs - EXEC) (filed herewith).
10.3	* Form of Cleveland-Cliffs Inc. 2021 Equity and Incentive Compensation Plan Market Stock Units Award Memorandum and Market Stock Units Award Agreement (2026 MSUs) (filed herewith).
10.4	* Form of Cleveland-Cliffs Inc. 2021 Equity and Incentive Compensation Plan Market Stock Units Award Memorandum and Market Stock Units Award Agreement (2026 MSUs - EXEC) (filed herewith).
22	Schedule of the obligated group, including the parent and issuer and the subsidiary guarantors that have guaranteed the obligations under the 4.625% 2029 Senior Notes, the 6.875% 2029 Senior Notes, the 6.750% 2030 Senior Notes, the 4.875% 2031 Senior Notes, the 7.500% 2031 Senior Notes, the 7.000% 2032 Senior Notes, the 7.375% 2033 Senior Notes, and the 7.625% 2034 Senior Notes issued by Cleveland-Cliffs Inc. (filed herewith).
31.1	Certification Pursuant to 15 U.S.C. Section 7241, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, signed and dated by Lourenco Goncalves as of April 21, 2026 (filed herewith).
31.2	Certification Pursuant to 15 U.S.C. Section 7241, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, signed and dated by Celso L. Goncalves Jr. as of April 21, 2026 (filed herewith).
32.1	Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, signed and dated by Lourenco Goncalves, Chairman, President and Chief Executive Officer of Cleveland-Cliffs Inc., as of April 21, 2026 (filed herewith).
32.2	Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, signed and dated by Celso L. Goncalves Jr., Executive Vice President, Chief Financial Officer of Cleveland-Cliffs Inc., as of April 21, 2026 (filed herewith).
95	Mine Safety Disclosures (filed herewith).
101	The following financial information from Cleveland-Cliffs Inc.'s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2026 formatted in Inline XBRL (Extensible Business Reporting Language) includes: (i) the Statements of Unaudited Condensed Consolidated Financial Position, (ii) the Statements of Unaudited Condensed Consolidated Operations, (iii) the Statements of Unaudited Condensed Consolidated Comprehensive Loss, (iv) the Statements of Unaudited Condensed Consolidated Cash Flows, (v) the Statements of Unaudited Condensed Consolidated Changes in Equity, and (vi) Notes to the Unaudited Condensed Consolidated Financial Statements.
104	The cover page from this Quarterly Report on Form 10-Q, formatted in Inline XBRL and contained in Exhibit 101.
*	Indicates management contract or other compensatory arrangement.

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.

		CLEVELAND-CLIFFS INC.
		By:	/s/ Kimberly A. Floriani
			Name:	Kimberly A. Floriani
			Title:	Senior Vice President, Controller & Chief Accounting Officer
Date:	April 21, 2026

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