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Exhibit 15.4

CONSENT OF QUALIFIED PERSON

Re: Annual Report on Form 20-F of ArcelorMittal

I, Bozo Kolonja, in connection with ArcelorMittal's Annual Report on Form 20-F for the year ended December 31, 2024 (the "2024 20-F"):

a.Certify that I have supervised and validated the preparation of the mineral reserves and mineral resource estimates for ArcelorMittal Prijedor mine;

b.Consent to the use of and references to my name, including my status as an expert or "qualified person" (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchange Commission), in connection with the 2024 20-F, the Registration Statements listed in paragraph (c) below and mineral reserves and mineral resource estimates for ArcelorMittal Prijedor mine; and

c.Consent to the incorporation by reference of the 2024 20-F into the Registration Statements Nos. 333-147382, 333-153576, 333-162697 and 333-170117 on Form S-8 and the Registration Statement No. 333-278551 on Form F-3 (and any amendments or supplements thereto).

I am responsible for authoring, and this consent pertains to mineral reserves and mineral resource estimates for ArcelorMittal Prijedor mine. I certify that I have read the 2024 20-F and that it fairly and accurately represents the mineral reserves/resources for each property for which I am responsible.

Dated: January 28th, 2025

/s/ Bozo Kolonja

Bozo Kolonja

Professor, PhD Mining Engineering

SME Professional (04168328)