Document

EXHIBIT 4.4

SECOND SUPPLEMENTAL INDENTURE

4.625% SENIOR GUARANTEED NOTES DUE 2029

4.875% SENIOR GUARANTEED NOTES DUE 2031

This Second Supplemental Indenture is made as of July 31, 2023 (this “Supplemental Indenture” or “Guarantee”), among Cleveland-Cliffs FPT Services Company, an Ohio corporation, Cleveland-Cliffs Services Holding Company, an Ohio corporation, Ferrous Processing and Trading Company, a Michigan corporation, FPT Cleveland, LLC, a Michigan limited liability company, FPT Florida, LLC, a Michigan limited liability company, FPT - Schlafer Division L.L.C., a Michigan limited liability company, Koil Metals L.L.C., a Michigan limited liability company, Lonyo Land L.L.C., a Michigan limited liability company, SLC Acquisition L.L.C., a Michigan limited liability company (collectively, the “Additional Guarantors”), Cleveland-Cliffs Inc., an Ohio corporation (together with its successors and assigns, the “Company”) and U.S. Bank Trust Company, National Association (successor in interest to U.S. Bank National Association), as Trustee (the “Trustee”) under the Indenture referred to below.

WITNESSETH:

WHEREAS, the Company, the Guarantors party thereto and the Trustee have heretofore executed and delivered an Indenture, dated as of February 17, 2021 (as amended, supplemented, waived or otherwise modified, the “Indenture”), providing for the issuance of an aggregate principal amount of $500,000,000 of 4.625% Senior Guaranteed Notes due 2029 and $500,000,000 of 4.875% Senior Guaranteed Notes due 2031 of the Company (collectively, the “Notes”);

WHEREAS, Section 3.08 of the Indenture provides that, after the Issue Date, the Company is required to cause certain direct or indirect Subsidiaries of the Company to execute and deliver to the Trustee a supplemental indenture pursuant to which such Subsidiary will unconditionally guarantee, on a joint and several basis with the other Guarantors, the full and prompt payment of the principal of, premium, if any, and interest on the Notes on an unsecured basis; and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee and the Company are authorized to execute and deliver this Supplemental Indenture to amend or supplement the Indenture, without the consent of any Holder.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Additional Guarantors, the Company and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

ARTICLE 1

Definitions

Section 1.01 Defined Terms. As used in this Supplemental Indenture, terms defined in the Indenture or in the preamble or recitals hereto are used herein as therein defined. The words “herein,” “hereof” and “hereby” and other words of similar import used in this Supplemental Indenture refer to this Supplemental Indenture as a whole and not to any particular section hereof.

ARTICLE 2

Agreement to be Bound; Guarantee

Section 2.01 Agreement to be Bound. Each Additional Guarantor hereby becomes a party to the Indenture as a Guarantor and as such will have all of the rights and be subject to all of the obligations and agreements of a Guarantor under the Indenture. Each Additional Guarantor agrees to be bound by all of

the provisions of the Indenture applicable to a Guarantor and to perform all of the obligations and agreements of a Guarantor under the Indenture.

Section 2.02 Guarantee. Each Additional Guarantor agrees, on a joint and several basis with all the existing Guarantors, to fully, unconditionally and irrevocably Guarantee to each Holder of the Notes and the Trustee the Guaranteed Obligations pursuant to Article 10 of the Indenture on an unsecured basis.

ARTICLE 3

Miscellaneous

Section 3.01 Notices. All notices and other communications to the Additional Guarantors shall be given as provided in the Indenture to the Additional Guarantors, at their respective addresses set forth below, with a copy to the Company as provided in the Indenture for notices to the Company.

Cleveland-Cliffs FPT Services Company

c/o Cleveland-Cliffs Inc.

200 Public Square, Suite 3300

Cleveland, Ohio 44114