MT / ArcelorMittal S.A. - Depositary Receipt (Common Stock) - SEC-arkivering, Årsberetning, Fuldmagtserklæring

Designated person notification

Exhibit 99.1 Press Release Designated person notification 03 June 2026, 15:00 CET With reference to Article 19(3) of Regulation (EU) No 596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse (Market Abuse Regulations), ArcelorMittal announces that notification of share transaction by a Designated Person (i.e. Directors or Executive Officers) is available in the Lux

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated June 3, 2026 Commission File Number: 001-35788 (Transl

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated June 3, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report ArcelorMittal (Exact name of registrant as specified in its charter) Grand Duchy of Luxembourg 001-35788 Not applicable (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 24-26, boulevard d' Avranches L-1160 Luxembou

Designated person notification

Exhibit 99.1 Press Release Designated person notification 27 May 2026, 16:30 CET With reference to Article 19(3) of Regulation (EU) No 596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse (Market Abuse Regulations), ArcelorMittal announces that notification of share transaction by a Designated Person (i.e. Directors or Executive Officers) is available in the Luxe

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 27, 2026 Commission File Number: 001-35788 (Transl

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated May 27, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 19, 2026 Commission File Number: 001-35788 (Transl

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated May 19, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (A

ARCELORMITTAL, as Company, WILMINGTON TRUST, NATIONAL ASSOCIATION, as Trustee, CITIBANK, N.A., as Securities Administrator Sixth Supplemental Indenture Dated as of May 19, 2026 U.S.$1,000,000,000 5.375% Notes due 2036 Supplement to the Senior Indentu

Exhibit 4.1 ARCELORMITTAL, as Company, WILMINGTON TRUST, NATIONAL ASSOCIATION, as Trustee, and CITIBANK, N.A., as Securities Administrator Sixth Supplemental Indenture Dated as of May 19, 2026 U.S.$1,000,000,000 5.375% Notes due 2036 Supplement to the Senior Indenture dated as of June 1, 2015 providing for the issuance of Senior Debt Securities TABLE OF CONTENTS TABLE OF CONTENTS 2 RECITALS: 3 ART

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 19, 2026 Commission File Number: 001-35788 (Transl

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 19, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Address of principal

1

Exhibit 99.1 press release ArcelorMittal unlocks value through partial sell-down of its shareholding in Vallourec with proceeds allocated to share buybacks 19 May 2026, 08:00 CET ArcelorMittal SA (“ArcelorMittal” or “the Company”) today announces the successful pricing of its secondary offering of shares in Vallourec SA (“Vallourec”). ArcelorMittal has sold approximately 23.9 million shares in Val

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 13, 2026 Commission File Number: 001-35788 (Transl

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated May 13, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (A

Designated person notification

Exhibit 99.1 press release Designated person notification 12 May 2026, 11:45 CET With reference to Article 19(3) of Regulation (EU) No 596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse (Market Abuse Regulations), ArcelorMittal announces that notification of share transaction by a Designated Person (i.e. Directors or Executive Officers) is available in the Luxe

$1,000,000,000 5.375% Notes Due 2036

TABLE OF CONTENTS  Filed pursuant to Rule 424(b)(5)  Registration No. 333-278551 $1,000,000,000 5.375% Notes Due 2036 Pursuant to this prospectus supplement, ArcelorMittal is offering $1,000,000,000 aggregate principal amount of 5.375% notes due May 19, 2036 (the Notes”). We may redeem the Notes at our option, in whole or in part, at any time and from time to time (i) prior to the Par Call Date (a

ENDS

Exhibit 99.1 ArcelorMittal Announces Pricing of Bond Issue 13 May 2026, 08:00 CET ArcelorMittal (the “Company” or the “Issuer”) priced yesterday an offering of US$1,000,000,000 aggregate principal amount of 5.375% notes due 19 May 2036 (the “Notes”). The net proceeds to ArcelorMittal (before expenses), amounting to approximately $987,120,000, will be used for general corporate purposes. The offeri

Underwriting Agreement May 12, 2026

Exhibit 99.1 EXECUTION VERSION Underwriting Agreement May 12, 2026 J.P. Morgan Securities LLC 270 Park Avenue New York, NY 10017 United States BofA Securities, Inc. One Bryant Park New York, NY 10036 United States Citigroup Global Markets Inc. 388 Greenwich Street New York, NY 10013 United States Goldman Sachs & Co. LLC 200 West Street New York, NY 10282-2198 United States HSBC Securities (USA) In

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 13, 2026 Commission File Number: 001-35788 (Transl

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 13, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Address of principal

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 13, 2026 Commission File Number: 001-35788 (Transl

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 13, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Address of principal

Security Type

Calculation of Filing Fee Tables F-3 ArcelorMittal Table 1: Newly Registered and Carry Forward Securities ☐Not Applicable Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Debt 5.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 12, 2026 Commission File Number: 001-35788 (Transl

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 12, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Address of principal

Final Term Sheet $1,000,000,000 5.375% Notes due May 19, 2036

Filed Pursuant to Rule 433 Registration No. 333-278551 Term Sheet dated May 12, 2026, supplementing the Preliminary Prospectus Supplement dated May 12, 2026 Final Term Sheet ArcelorMittal $1,000,000,000 5.375% Notes due May 19, 2036 This final term sheet dated May 12, 2026, relates only to the securities described below and should be read together with the preliminary prospectus supplement dated M

$           % Notes Due

TABLE OF CONTENTS The information in this preliminary prospectus supplement is not complete and may be changed.

ArcelorMittal reports first quarter 2026 results

Exhibit 99.1 ArcelorMittal reports first quarter 2026 results On April 30, 2026 - ArcelorMittal (referred to as “ArcelorMittal” or the “Company” or the "Group") (MT (New York, Amsterdam, Paris, Luxembourg), MTS (Madrid)) announced results1 for the three-month period ended March 31, 2026 (“1Q 2026”; the three month periods ended December 31, 2025, September 30, 2025, June 30, 2025 and March 31, 202

ArcelorMittal announces results of its General Meetings

Exhibit 99.1 ArcelorMittal announces results of its General Meetings 5 May 2026, 13:20 CET The Annual General Meeting and the Extraordinary General Meeting (‘General Meetings’) of shareholders of ArcelorMittal (the “Company”) held today in Luxembourg approved all resolutions by a strong majority. 82.28% of the voting rights were represented at the General Meetings. The results of the votes will be

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 5, 2026 Commission File Number: 001-35788 (Transla

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated May 5, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Ad

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated April 30, 2026 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated April 30, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

(USDm) unless otherwise shown 1Q 26 4Q 25 3Q 25 2Q 25 1Q 25 Sales 2,809 2,901 2,807 2,816 2,648 Operating income/(loss) 223 229 210 (137) 306 Depreciation (111) (112) (91) (91) (85) Exceptional items — — — (453) — EBITDA 334 341 301 407 391 Crude ste

Exhibit 99.1 ArcelorMittal reports first quarter 2026 results Luxembourg, April 30, 2026 - ArcelorMittal (referred to as “ArcelorMittal” or the “Company” or the "Group") (MT (New York, Amsterdam, Paris, Luxembourg), MTS (Madrid)), the world’s leading integrated steel and mining company, today announced results1 for the three-month period ended March 31, 2026 1Q 2026 key highlights: Safety focus: P

ENDS

Exhibit 99.2 press release ArcelorMittal announces the publication of its first quarter 2026 sell-side analyst consensus figures 23 April 2026, 15:00 CET ArcelorMittal today announces the publication of its first quarter 2026 sell-side analyst consensus figures. The consensus figures are based on analysts’ estimates recorded on an external web-based tool provided and managed by an independent comp

ENDS

Exhibit 99.1 press release ArcelorMittal publishes its 2025 Sustainability Report: Safer, smarter growth Report outlines encouraging progress with the ongoing transformation to world-class safety levels and a significant reduction in absolute carbon emissions1 23 April 2026, 08:30 CET ArcelorMittal (“the Company”) today published its 2025 Sustainability Report, detailing progress made last year to

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated April 23, 2026 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated April 23, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated April 3, 2026 Commission File Number: 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated April 3, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (

ArcelorMittal has published a convening notice for its Annual General Meeting and Extraordinary General Meeting of shareholders to be held on 5 May 2026

Exhibit 99.1 press release ArcelorMittal has published a convening notice for its Annual General Meeting and Extraordinary General Meeting of shareholders to be held on 5 May 2026 3 April 2026, 8.00am CET ArcelorMittal (the ‘Company’) announces the publication of the convening notice for its Annual General Meeting and Extraordinary General Meeting of shareholders (the “General Meetings”), which wi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated March 30, 2026 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated March 30, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

ArcelorMittal announces publication of the 2025 statutory financial statements of ArcelorMittal parent company

Exhibit 99.1 press release ArcelorMittal announces publication of the 2025 statutory financial statements of ArcelorMittal parent company 27 March 2026, 17:45 CET ArcelorMittal has published the statutory financial statements of ArcelorMittal parent company for the year ended 31 December 2025. These financial statements have been filed with the electronic database of the Luxembourg Stock Exchange

Designated person notification

Exhibit 99.1 press release Designated person notification 17 March 2026, 15:00 CET With reference to Article 19(3) of Regulation (EU) No 596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse (Market Abuse Regulations), ArcelorMittal announces that notifications of share transaction by a Designated Person (i.e. Directors or Executive Officers) are available in the

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated March 17, 2026 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated March 17, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated March 10, 2026 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated March 10, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

ENDS

Exhibit 99.1 press release ArcelorMittal announces the publication of its Annual Report 2025 on Form 20-F and the publication of its 2025 annual report 6 March 2026, 23:55 CET ArcelorMittal has today filed its Annual Report 2025 on Form 20-F with the U.S. Securities and Exchange Commission (SEC). The report is now available at http://corporate.arcelormittal.com > Financial reports. ArcelorMittal w

CONSENT OF QUALIFIED PERSON

Exhibit 15.6 CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal I, Michael Spleit, an employee of ArcelorMittal, am a mining engineer with over 15 years' experience in the mineral resource industry and a master's degree in mining engineering from McGill University. I have performed personal inspections of ArcelorMittal Liberia's Mt. Tokadeh, Mt. Gangra, and Mt. Yuelliton d

ARCELORMITTAL EXECUTIVE OFFICE PERFORMANCE SHARE UNIT PLAN ANNEX C Amendment of eligible participants to the Executive Office Performance Share Units Plan

Exhibit 4.17 ARCELORMITTAL EXECUTIVE OFFICE PERFORMANCE SHARE UNIT PLAN ANNEX C Amendment of eligible participants to the Executive Office Performance Share Units Plan The ArcelorMittal Executive Office Performance Share Unit Plan approved at the annual general shareholders meeting held on May 2nd, 2023 was intended to create an incentive vehicle provided exclusively to the members of the Executiv

Consorcio Minero Benito Juarez Peña Colorada CONSENT OF THE QUALIFIED PERSON

Exhibit 15.8 Consorcio Minero Benito Juarez Peña Colorada CONSENT OF THE QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal I, Hernandez Guerrero Hector Rodrigo, an employee of Peña Colorada, in connection with ArcelorMittal's Annual Report on Form 20-F for the year ended December 31, 2025 (the "2025 20-F"): 1.certify that I have supervised and validated the preparation of the minera

REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F ☐REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2025 OR ☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1

February 24, 2026

Exhibit 15.7 February 24, 2026 Consent of Qualified Person Re: Annual Report on Form 20-F of ArcelorMittal S.A. (the "Company") SLR Consulting (Canada) Ltd. ("SLR"), in connection with ArcelorMittal's Annual Report on Form 20-F for the year ended December 31, 2025 (the "2025 20-F"): a.Certifies that it has supervised and validated the preparation of the Mineral Resource and Mineral Reserve estimat

CONSENT OF QUALIFIED PERSON

Exhibit 15.4 CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal I, Raquel Camargos Lima, an employee of ArcelorMittal, in connection with ArcelorMittal's Annual Report on Form 20-F for the year ended December 31, 2025 (the "2025 20-F"): a) certify that I have supervised and validated the preparation of the mineral reserve estimates of Andrade iron ore mine; b) consent to t

CERTIFICATIONS OF ARCELORMITTAL’S CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER PURSUANT TO RULE 13(a)-14(b) UNDER THE EXCHANGE ACT AND SECTION 1350 OF CHAPTER 63 OF TITLE 18 OF THE UNITED STATES CODE

Exhibit 13.1 CERTIFICATIONS OF ARCELORMITTAL’S CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER PURSUANT TO RULE 13(a)-14(b) UNDER THE EXCHANGE ACT AND SECTION 1350 OF CHAPTER 63 OF TITLE 18 OF THE UNITED STATES CODE In connection with the Annual Report on Form 20-F of ArcelorMittal (the “Company”) for the year ended December 31, 2025 as filed with the Securities and Exchange Commission (the “R

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 15.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the following Registration Statements of ArcelorMittal: (1)Registration Statement (Form F-3 No. 333-278551), and (2)Registration Statements (Form S-8 Nos. 333-147382, 333-153576, 333-162697, and 333-170117). of our reports dated March 6, 2026, with respect to the consolidated finan

CONSENT OF QUALIFIED PERSON

Exhibit 15.5 CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal DMT Consulting Private Limited, in connection with ArcelorMittal's Annual Report on Form 20-F for the year ended December 31, 2025 (the "2025 20-F"): a) certifies that it has supervised and validated the preparation of the mineral resources and mineral reserves estimates for the Thakurani Iron Ore Mine, India;

February 24, 2026

Exhibit 15.9 February 24, 2026 Consent of Qualified Person Re: Annual Report on Form 20-F of ArcelorMittal S.A. (the "Company") SLR Consulting (Canada) Ltd. ("SLR"), in connection with ArcelorMittal's Annual Report on Form 20-F for the year ended December 31, 2025 (the "2025 20-F"): a) Certifies that it has supervised and validated the preparation of the Mineral Resource estimate for the Thabazimb

CONSENT OF QUALIFIED PERSON

Exhibit 15.10 CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal LLC «KAI», in connection with ArcelorMittal's Annual Report on Form 20-F for the year ended December 31, 2025 (the "2025 20-F"): a) certifies that it has supervised and validated the preparation of the Mineral Reserves and Mineral Resources estimates for ArcelorMittal Kryvyi Rih Open Pit; b) consents to the u

ARCELORMITTAL EXECUTIVE OFFICE Performance Share Unit PLAN ANNEX D Supplemental Terms for 2025-2026 Executive Office Performance Share Units Plan

Exhibit 4.19 ARCELORMITTAL EXECUTIVE OFFICE Performance Share Unit PLAN ANNEX D Supplemental Terms for 2025-2026 Executive Office Performance Share Units Plan The following share limits and vesting provisions shall apply to all Awards granted pursuant to the Plan during the period beginning on the date of the general meeting of shareholders of the Company in 2025 and ending on the date of the annu

EQUITY INCENTIVE PLAN ANNEX E Supplemental Terms for 2025-2026 Restricted Share Units and Performance Share Units

Exhibit 4.18 ARCELORMITTAL EQUITY INCENTIVE PLAN ANNEX E Supplemental Terms for 2025-2026 Restricted Share Units and Performance Share Units The following share limits and vesting provisions shall apply to all Awards of Restricted Share Units and Performance Share Units granted pursuant to the Plan during the period beginning on the date of the annual general meeting of shareholders of the Company

DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934

Exhibit 2.2 DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 As of December 31, 2025, ArcelorMittal (“ArcelorMittal,” the “Company,” “we,” “us,” and “our”) had the following securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”): Table Title of each class Trading Symbol(s) Nam

CONSENT OF QUALIFIED PERSON

Exhibit 15.3 CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal S.A. ("ArcelorMittal") SLR Consulting (Canada) Ltd. ("SLR"), in connection with ArcelorMittal's Annual Report on Form 20-F for the year ended December 31, 2025 (the "2025 20-F"): a.certifies that it supervised and validated the preparation of the original estimates of mineral resources and mineral reserves for

ArcelorMittal Mining Canada G.P. CONSENT OF QUALIFIED PERSON

Exhibit 15.2 ArcelorMittal Mining Canada G.P. CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal I, Melanie Bolduc, an employee of ArcelorMittal, in connection with ArcelorMittal's Annual Report on Form 20-F for the year ended December 31, 2025 (the "2025 20-F"): a) certify that I have supervised and validated the preparation of the mineral resource estimates for the Mont-

« ArcelorMittal » société anonyme 24-26, boulevard d’Avranches, L-1160 Luxembourg R.C.S. Luxembourg, section B numéro 82 454

Exhibit 1.1 « ArcelorMittal » société anonyme 24-26, boulevard d’Avranches, L-1160 Luxembourg R.C.S. Luxembourg, section B numéro 82 454 ********************************************************************************* STATUTS COORDONNES à la date du 20 novembre 2025 ********************************************************************************* Article 1. Form - Corporate name The Company’s leg

CERTIFICATIONS OF ARCELORMITTAL’S CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER PURSUANT TO RULE 13a-14(a) UNDER THE EXCHANGE ACT

Exhibit 12.1 CERTIFICATIONS OF ARCELORMITTAL’S CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER PURSUANT TO RULE 13a-14(a) UNDER THE EXCHANGE ACT I, Mr. Aditya Mittal, certify that: 1.I have reviewed this annual report on Form 20-F of ArcelorMittal; 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 th

ENDS

Exhibit 99.1 press release ArcelorMittal confirms the construction of an electric arc furnace in Dunkirk, France: a €1.3 billion investment supporting an important step in its decarbonisation 10 February 2026, 12:15 CET ArcelorMittal today confirms the construction of an electric arc furnace (EAF) at its steelmaking site in Dunkirk – a strategic €1.3 billion investment which marks a major step in

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated February 10, 2026 Commission File Number: 001-35788 (T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated February 10, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembou

(USDm) unless otherwise shown 4Q 25 3Q 25 4Q 24 12M 25 12M 24 Sales 2,901 2,807 2,889 11,172 12,401 Operating income 229 210 358 608 1,399 Depreciation (112) (91) (96) (379) (361) Impairment items — — (43) — (43) Exceptional items — — — (453) — EBITD

Exhibit 99.1 ArcelorMittal reports fourth quarter 2025 and full year 2025 results Luxembourg, February 5, 2026 - ArcelorMittal (referred to as “ArcelorMittal” or the “Company” or the "Group") (MT (New York, Amsterdam, Paris, Luxembourg), MTS (Madrid)), the world’s leading integrated steel and mining company, today announced results1 for the three-month and twelve-month periods ended December 31, 2

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated February 5, 2026 Commission File Number: 001-35788 (Tr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated February 5, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembour

ENDS

Exhibit 99.1 press release ArcelorMittal announces the publication of its fourth quarter and full year 2025 sell-side analyst consensus figures 3 February 2026, 14:30 CET ArcelorMittal today announces the publication of its fourth quarter and full year 2025 sell-side analyst consensus figures. The consensus figures are based on analysts’ estimates recorded on an external web-based tool provided an

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated February 4, 2026 Commission File Number: 001-35788 (Tr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated February 4, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembour

ENDS

Exhibit 99.1 press release Government of Liberia and ArcelorMittal sign new long-term Mineral Development Agreement 30 January 2026, 08:30 CET The Government of the Republic of Liberia and ArcelorMittal (“the Company”) have signed an amendment to the existing Mineral Development Agreement (MDA), which was yesterday ratified via the Liberian legislative process, extending the duration of the agreem

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated January 30, 2026 Commission File Number: 001-35788 (Tr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated January 30, 2026 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembour

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated January 29, 2025 Commission File Number: 001-35788 (Tr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated January 29, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembour

Statement re Acciaierie d'Italia

Exhibit 99.1 press release Statement re Acciaierie d'Italia 29 January 2026 14:00 CET ArcelorMittal S.A. (‘ArcelorMittal’) confirms it has today been served by the Extraordinary Commissioners of Acciaierie d'Italia S.p.A. in Extraordinary Administration (‘ADI’) - the company operating the Italian steel plants owned and formerly managed by Ilva S.p.A. in Extraordinary Administration (‘Ilva’) - with

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated December 22, 2025 Commission File Number: 001-35788 (T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated December 22, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembou

ArcelorMittal expands its portfolio of renewable energy projects

Exhibit 99.1 press release ArcelorMittal expands its portfolio of renewable energy projects Three new projects in India will bring the Company’s global renewable energy capacity to 3.3GW 22 December 2025, 08:30 CET ArcelorMittal (‘the Company’) today announces three new renewable energy projects in India totaling 1GW of nominal solar and wind capacity. Upon completion the projects will double Arce

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated December 16, 2025 Commission File Number: 001-35788 (T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated December 16, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembou

Designated person notification

Exhibit 99.2 press release Designated person notification 16th December 2025 With reference to Article 19(3) of Regulation (EU) No 596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse (Market Abuse Regulations), ArcelorMittal announces that notifications of share transactions by a Designated Person (i.e. Directors or Executive Officers) are available in the Luxem

ENDS

Exhibit 99.1 press release ArcelorMittal announces its financial calendar for 2026 12 December 2025, 14:00 CET ArcelorMittal today announces its financial calendar for 2026. Earnings results announcements: •5 February 2026: Q4 and full year 2025 •30 April 2026: Q1 2026 •30 July 2026: Q2 and half year 2026 •5 November 2026: Q3 2026 Annual General Meeting of Shareholders: •5 May 2026 ENDS About Arce

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated November 21, 2025 Commission File Number: 001-35788 (T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated November 21, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembou

ENDS

Exhibit 99.1 press release ArcelorMittal cancels 77,809,772 treasury shares 21 November 2025, 11:00 CET ArcelorMittal (the ‘Company’) announces that 77,809,772 shares treasury shares have been cancelled yesterday. Post cancellation, the Company still holds approximately 14.4 million treasury shares which will be used to service its commitments relating to its Long-Term Incentive Plan. As a result

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated November 6, 2025 Commission File Number: 001-35788 (Tr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated November 6, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembour

(USDm) unless otherwise shown 3Q 25 2Q 25 3Q 24 9M 25 9M 24 Sales 2,807 2,816 3,218 8,271 9,512 Operating income/(loss) 210 (137) 414 379 1,041 Depreciation (91) (91) (83) (267) (265) Exceptional items — (453) — (453) — EBITDA 301 407 497 1,099 1,306

Exhibit 99.1 ArcelorMittal reports third quarter 2025 Luxembourg, November 6, 2025 - ArcelorMittal (referred to as “ArcelorMittal” or the “Company” or the "Group") (MT (New York, Amsterdam, Paris, Luxembourg), MTS (Madrid)), the world’s leading integrated steel and mining company, today announced results1 for the three-month and nine-month periods ended September 30, 2025. 3Q 2025 key highlights:

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated November 3, 2025 Commission File Number: 001-35788 (Tr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated November 3, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembour

ArcelorMittal completes sale of Bosnia operations

press release ArcelorMittal completes sale of Bosnia operations October 30, 2025, 15:30 CET ArcelorMittal today announces it has completed the sale of ArcelorMittal Zenica and ArcelorMittal Prijedor, its steel and mining operations in Bosnia and Herzegovina, to H&P d.

ArcelorMittal announces the publication of its third quarter 2025 sell-side analyst consensus figures

press release ArcelorMittal announces the publication of its third quarter 2025 sell-side analyst consensus figures October 27, 2025, 22:15 CET ArcelorMittal (‘the Company’) today announces the publication of its third quarter 2025 sell-side analyst consensus figures.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated October 28, 2025 Commission File Number: 001-35788 (Tr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated October 28, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembour

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated October 1, 2025 Commission File Number: 001-35788 (Tra

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated October 1, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

ArcelorMittal announces the issuance of €650,000,000 3.250 per cent notes due 30 September 2030

Exhibit 99.1 press release ArcelorMittal announces the issuance of €650,000,000 3.250 per cent notes due 30 September 2030 30 September 2025, 19:00 CET ArcelorMittal announces the issuance of €650,000,000 3.250 per cent notes due 30 September 2030 (the “Notes”). The issuance closed today. The Notes were issued under ArcelorMittal’s wholesale Euro Medium Term Notes Programme. The proceeds of the is

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated September 23, 2025 Commission File Number: 001-35788 (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated September 23, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembo

Designated person notification

Exhibit 99.1 press release Designated person notification 23rd September 2025, 16:30 CET With reference to Article 19(3) of Regulation (EU) No 596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse (Market Abuse Regulations), ArcelorMittal announces that notifications of share transactions by a Designated Person (i.e. Directors or Executive Officers) are available

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated August 1, 2025 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated August 1, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

ENDS

Exhibit 99.1 press release ArcelorMittal publishes its 2025 half-year report 1 August 2025, 19:30 CET ArcelorMittal (the ‘Company’) has today published its half-year report for the six-month period ended 30 June 2025. The report is available on http://corporate.arcelormittal.com/ under Investors > Financial reports > Half-year reports, and on the electronic database of the Luxembourg Stock Exchang

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated August 1, 2025 Commission File Number 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated August 1, 2025 Commission File Number 001-35788 ARCELORMITTAL (Translation of Registrant’s name into English) 24-26, boulevard d’Avranches, L-1160 Luxembourg, Grand Duchy of Luxembourg (Address of princip

ARCELORMITTAL 6-K

ARCELORMITTAL 6-K EXHIBIT 99.1 ArcelorMittal reports second quarter 2025 Luxembourg, July 31, 2025 - ArcelorMittal (referred to as “ArcelorMittal” or the “Company” or the "Group") (MT (New York, Amsterdam, Paris, Luxembourg), MTS (Madrid)), the world’s leading integrated steel and mining company, today announced results1 for the three-month and six-month periods ended June 30, 2025. 2Q 2025 key hi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated July 31, 2025 Commission File Number: 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated July 31, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Address of principal

2025 sell-side analyst consensus figures

Exhibit 99.1 press release ArcelorMittal announces the publication of its second quarter 2025 sell-side analyst consensus figures July 29, 2025, 15:30 CET ArcelorMittal (‘the Company’) today announces the publication of its second quarter 2025 sell-side analyst consensus figures. The consensus figures are based on analysts’ estimates recorded on an external web-based tool provided and managed by a

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated July 29, 2025 Commission File Number: 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated July 29, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (

Introduction 2 Basis of preparation 2 Overview of payments 4 Payments per government and project 5 Bosnia and Herzegovina 5 Brazil 5 Canada 5 Liberia 6 Mexico 6 Ukraine 6

Table of Contents Introduction 2 Basis of preparation 2 Overview of payments 4 Payments per government and project 5 Bosnia and Herzegovina 5 Brazil 5 Canada 5 Liberia 6 Mexico 6 Ukraine 6 1 Introduction ArcelorMittal has prepared this consolidated report (the "Report") on payments to governments with respect to its extractive activities in accordance with the European Union directives 2013/34/EU and 2013/50/EU (“EU Directives”) as transposed into the Luxembourg laws of December 18, 2015 and May 10, 2016 (the “Transparency Law”).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT (Exact name of registrant as specified in its charter) Grand Duchy of Luxembourg 001-35788 Not applicable (Jurisdiction of incorporation or

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT ArcelorMittal (Exact name of registrant as specified in its charter) Grand Duchy of Luxembourg 001-35788 Not applicable (Jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 24-26, Boulevard d’Avranches, L-1160 Luxembourg Grand Duchy

ENDS

Exhibit 99.1 press release ArcelorMittal publishes its 2024 Payments to governments in respect of extractive activities report 30 June 2025, 16:00 CET ArcelorMittal (’the Company’) has today filed its 2024 Payments to governments in respect of extractive activities report, which provides a consolidated overview of payments made by the Company and its subsidiaries in 2024 to governments regarding i

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated June 30, 2025 Commission File Number: 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated June 30, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (

ArcelorMittal completes the acquisition of Nippon Steel Corporation’s interest in AM/NS Calvert

Exhibit 99.1 press release ArcelorMittal completes the acquisition of Nippon Steel Corporation’s interest in AM/NS Calvert 18 June 2025, 19:30 CET In accordance with the definitive Equity Purchase Agreement (the “EPA”) signed between ArcelorMittal (the “Company”) and Nippon Steel Corporation (“NSC”) on 11 October 2024, the Company confirms that it has completed the acquisition (the “transaction”)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated June 20, 2025 Commission File Number: 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated June 20, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (

ArcelorMittal announces sale of Bosnian operations

Exhibit 99.2 press release ArcelorMittal announces sale of Bosnian operations 20 June 2025, 15:30 CET ArcelorMittal (“the company”) has today signed a sale and purchase agreement to sell its operations in Bosnia and Herzegovina. ArcelorMittal Zenica, an integrated steel plant, and ArcelorMittal Prijedor, an iron ore mining business which supplies the Zenica plant, will be sold to Pavgord Group. Th

ENDS

Exhibit 99.1 press release Designated Person Notification 14 May 2025, 14:15 CET With reference to Article 19(3) of Regulation (EU) No 596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse (Market Abuse Regulations), ArcelorMittal announces that notifications of share transactions by a Designated Person (i.e. Directors or Executive Officers) are available in the L

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 14, 2025 Commission File Number: 001-35788 (Transl

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated May 14, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report ArcelorMittal (Exact name of registrant as specified in its charter) Grand Duchy of Luxembourg 001-35788 Not applicable (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 24-26, boulevard d’Avranches L-1160 Luxembour

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 6, 2025 Commission File Number: 001-35788 (Transla

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated May 6, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Ad

ENDS

Exhibit 99.1 press release ArcelorMittal announces results of its General Meeting 6 May 2025, 15.15 CET The Annual General Meeting (‘General Meeting’) of shareholders of ArcelorMittal (the “Company”) held today in Luxembourg approved all resolutions by a strong majority. 71.73% of the voting rights were represented at the General Meeting. The results of the votes will be posted shortly on www.arce

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated April 30, 2025 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated April 30, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Address of principa

ARCELORMITTAL 6-K

ARCELORMITTAL 6-K Exhibit 99.1 ArcelorMittal reports first quarter 2025 Luxembourg, April 30, 2025 - ArcelorMittal (referred to as “ArcelorMittal” or the “Company” or the "Group") (MT (New York, Amsterdam, Paris, Luxembourg), MTS (Madrid)), the world’s leading integrated steel and mining company, today announced results1 for the three-month period ended March 31, 2025. 1Q 2025 key highlights: Safe

ENDS

Exhibit 99.1 ArcelorMittal announces the publication of its first quarter 2025 sell-side analyst consensus figures 17 April 2025, 19:00 CET ArcelorMittal today announces the publication of its first quarter 2025 sell-side analyst consensus figures. The consensus figures are based on analysts’ estimates recorded on an external web-based tool provided and managed by an independent company, Visible A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated April 18, 2025 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated April 18, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

1

Exhibit 99.1 press release ArcelorMittal publishes its 2024 Sustainability Report 17 April 2025, 08:30 CET ArcelorMittal (‘the Company’) has today published its 2024 Sustainability Report (‘the report’), which can be accessed here: https://corporate.arcelormittal.com/media/3fwar2wu/2024-sustainability-report.pdf. The report provides an update on the progress made in 2024 on the Company’s most mate

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated April 17, 2025 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated April 17, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated April 7, 2025 Commission File Number: 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated April 7, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (

ENDS

Exhibit 99.1 ArcelorMittal announces the commencement of a new share buyback program over the period 2025-2030 7 April 2025, 08:30 CET Following the announced completion of its 85 million shares buyback program on 2 April 2025, ArcelorMittal (the ‘Company’) announces the commencement of a new share buyback program (the ‘Program’) with share repurchases to be conducted in tranches that may be annou

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated April 4, 2025 Commission File Number: 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated April 4, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated April 4, 2025 Commission File Number: 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated April 4, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (

ENDS

Exhibit 99.1 ArcelorMittal publishes convening notice for its Annual General Meeting of shareholders 4 April 2025, 08:00 CET ArcelorMittal (the ‘Company’) has today published the convening notice for its Annual General Meeting of shareholders (the ‘General Meeting’), which will be held on 6 May 2025 at 12:30 CET at the Company’s registered office, 24-26, boulevard d’Avranches, L-1160 Luxembourg, G

ENDS

Exhibit 99.1 ArcelorMittal announces updated financial calendar for 2025 4 April 2025, 18:04 CEST ArcelorMittal today announces a revision to its financial calendar for 2025. The Q1 2025 earnings results initially scheduled on 2 May 2025 and announced by way of a press release dated 6 December 2024 will now be published on 30 April 2025. The remainder of the financial calendar for 2025 remains unc

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated April 2, 2025 Commission File Number: 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated April 2, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (

ENDS

Exhibit 99.1 ArcelorMittal announces the completion of its 85 million shares buyback program 2 April 2025, 10:30 CET ArcelorMittal (the “Company”) today announces that it has completed the 85 million shares buyback program it announced on 5 May 2023 under the authorization given by the annual general meeting of shareholders of 2 May 2023 and continued under the 30 April 2024 annual general meeting

ENDS

Exhibit 99.1 ArcelorMittal announces publication of the 2024 statutory financial statements of ArcelorMittal parent company 27 March 2025, 17:30 CET ArcelorMittal has published the statutory financial statements of ArcelorMittal parent company for the year ended 31 December 2024. These financial statements have been filed with the electronic database of the Luxembourg Stock Exchange (www.bourse.lu

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated March 31, 2025 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated March 31, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

ENDS

Exhibit 99.1 Designated Person Notification 17 March 2025, 17:30 CET With reference to Article 19(3) of Regulation (EU) No 596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse (Market Abuse Regulations), ArcelorMittal announces that notification of share transaction by a Designated Person (i.e. Directors or Executive Officers) is available in the Luxembourg Stock

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated March 18, 2025 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated March 18, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

ENDS

Exhibit 99.1 Designated Person Notification 14 March 2025, 13:45 CET With reference to Article 19(3) of Regulation (EU) No 596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse (Market Abuse Regulations), ArcelorMittal announces that notifications of share transaction by a Designated Person (i.e. Directors or Executive Officers) are available in the Luxembourg Sto

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated March 17, 2025 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated March 17, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

ENDS

Exhibit 99.2 ArcelorMittal publishes its Annual Report 2024 on Form 20-F 10 March 2025, 20:00 CET ArcelorMittal has filed its Annual Report 2024 on Form 20-F with the U.S. Securities and Exchange Commission (SEC). The report is now available at http://corporate.arcelormittal.com > Financial reports. ArcelorMittal will send a hard copy of the Form 20-F Annual Report for 2024, which includes the aud

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated March 11, 2025 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated March 11, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

ENDS

Exhibit 99.1 ArcelorMittal announces the publication of its 2024 annual report 10 March 2025, 23:55 CET ArcelorMittal has published its annual report for the year ended 31 December 2024. The report has been filed with the electronic database of the Luxembourg Stock Exchange (www.bourse.lu) and is available at http://corporate.arcelormittal.com > Financial reports ENDS About ArcelorMittal ArcelorMi

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 15.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the following Registration Statements of ArcelorMittal: 1.Registration Statement (Form F-3 No. 333-278551), and 2.Registration Statements (Form S-8 Nos. 333-147382, 333-153576, 333-162697, and 333-170117); of our reports dated March 10, 2025, with respect to the consolidated financ

CERTIFICATIONS OF ARCELORMITTAL’S CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER PURSUANT TO RULE 13a-14(a) UNDER THE EXCHANGE ACT

Exhibit 12.1 CERTIFICATIONS OF ARCELORMITTAL’S CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER PURSUANT TO RULE 13a-14(a) UNDER THE EXCHANGE ACT I, Mr. Aditya Mittal, certify that: 1.I have reviewed this annual report on Form 20-F of ArcelorMittal; 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 th

DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934

Exhibit 2.2 DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 As of December 31, 2024, ArcelorMittal (“ArcelorMittal,” the “Company,” “we,” “us,” and “our”) had the following securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”): Table Title of each class Trading Symbol(s) Nam

February 20, 2025

Exhibit 15.8 February 20, 2025 Consent of Qualified Person Re: Form 20-F of ArcelorMittal S.A. (the "Company") SLR Consulting (Canada) Ltd. ("SLR"), in connection with the Company's Annual Report on Form 20-F for the year ended December 31, 2024 (the "2024 20-F"): a.Certifies that we have supervised and validated the preparation of the Mineral Resource and Mineral Reserve estimates for the Las Tru

CONSENT OF QUALIFIED PERSON

Exhibit 15.6 CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal I, Ravindra "Ravi" Sharma, 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 resources and mineral reserves for the Thakurani Iron Ore Mine, India; b) consent to th

ArcelorMittal Mining Canada G.P. CONSENT OF QUALIFIED PERSON

Exhibit 15.2 ArcelorMittal Mining Canada G.P. CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal I, Melanie Bolduc, an employee of ArcelorMittal, 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 resource estimates for Mont-Wrig

CONSENT OF QUALIFIED PERSON

Exhibit 15.11 CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal LLC «KAI», in connection with ArcelorMittal's Annual Report on Form 20-F for the year ended December 31, 2024 (the "2024 20-F"): a) certifies that it has supervised and validated the preparation of the mineral reserves and mineral resources estimates for ArcelorMittal Kryvyi Rih Open Pit; b) consents to the u

NOTE 14:

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F ☐REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR ☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1

CONSENT OF QUALIFIED PERSON

Exhibit 15.9 CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal S.A. ("ArcelorMittal") SLR Consulting (Canada) Ltd. ("SLR"), in connection with ArcelorMittal's Annual Report on Form 20-F for the year ended December 31, 2024 (the "2024 20-F"): a.certifies that we have supervised and validated the preparation of the Mineral Resource and Mineral Reserve estimates for the Peña

EQUITY INCENTIVE PLAN ANNEX D Supplemental Terms for 2024-2025 Restricted Share Units and Performance Share Units

Exhibit 4.15 ARCELORMITTAL EQUITY INCENTIVE PLAN ANNEX D Supplemental Terms for 2024-2025 Restricted Share Units and Performance Share Units The following share limits and vesting provisions shall apply to all Awards of Restricted Share Units and Performance Share Units granted pursuant to the Plan during the period beginning on the date of the annual general meeting of shareholders of the Company

CERTIFICATIONS OF ARCELORMITTAL’S CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER PURSUANT TO RULE 13(a)-14(b) UNDER THE EXCHANGE ACT AND SECTION 1350 OF CHAPTER 63 OF TITLE 18 OF THE UNITED STATES CODE

Exhibit 13.1 CERTIFICATIONS OF ARCELORMITTAL’S CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER PURSUANT TO RULE 13(a)-14(b) UNDER THE EXCHANGE ACT AND SECTION 1350 OF CHAPTER 63 OF TITLE 18 OF THE UNITED STATES CODE In connection with the Annual Report on Form 20-F of ArcelorMittal (the “Company”) for the year ended December 31, 2024 as filed with the Securities and Exchange Commission (the “R

CONSENT OF QUALIFIED PERSON

Exhibit 15.7 CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal I, Michael Spleit, an employee of ArcelorMittal, am a mining engineer with over 15 years' experience in the mineral resource industry and a master's degree in mining engineering from McGill University. I have performed personal inspections of ArcelorMittal Liberia's Mt. Tokadeh, Mt. Gangra, and Mt. Yuelliton d

ARCELORMITTAL EXECUTIVE OFFICE Performance Share Unit PLAN ANNEX B Supplemental Terms for 2024-2025 Executive Office Performance Share Units Plan

Exhibit 4.16 ARCELORMITTAL EXECUTIVE OFFICE Performance Share Unit PLAN ANNEX B Supplemental Terms for 2024-2025 Executive Office Performance Share Units Plan The following share limits and vesting provisions shall apply to all Awards granted pursuant to the Plan during the period beginning on the date of the general meeting of shareholders of the Company in 2024 and ending on the date of the annu

CONSENT OF QUALIFIED PERSON

Exhibit 15.10 CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal I, Chantelle Cassandra Obermeyer, an employee of and Principal Geologist at VBKOM (Pty) Ltd, 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 Thabazimbi Iron Ore Mine Min

CONSENT OF QUALIFIED PERSON

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 a

CONSENT OF QUALIFIED PERSON

Exhibit 15.5 CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal GE21 Consultoria Mineral ("GE21"), in connection with ArcelorMittal's Annual Report on Form 20-F for the year ended December 31, 2024 (the "2024 20-F"): a) certifies that it has supervised and validated the preparation of the mineral resource and mineral reserve estimates of Andrade iron ore mine; b) consents

In compliance with international and national regulations on insider dealing, the Board of directors of ArcelorMittal, in order to ensure appropriate treatment of Inside Information and thus avoid insider dealing and Market Manipulation, has adopted

In compliance with international and national regulations on insider dealing, the Board of directors of ArcelorMittal, in order to ensure appropriate treatment of Inside Information and thus avoid insider dealing and Market Manipulation, has adopted the following Insider Dealing Regulations that apply throughout the ArcelorMittal group.

CONSENT OF QUALIFIED PERSON

Exhibit 15.3 CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal S.A. ("ArcelorMittal") SLR Consulting (Canada) Ltd. ("SLR"), in connection with ArcelorMittal's Annual Report on Form 20-F for the year ended December 31, 2024 (the "2024 20-F"): a.certifies that it supervised and validated the preparation of the original estimates of mineral resources and mineral reserves for

ENDS

Exhibit 99.1 ArcelorMittal appoints Everton Negresiolo as CEO of South American Long Products and mining business Jorge Luiz Ribeiro de Oliveira nominated Executive Vice President of ArcelorMittal 3 March 2025, 17:00 CET ArcelorMittal (‘the company’ or ‘the group’) today announces the appointment of Everton Negresiolo as CEO of its South American Long Products and mining business and a member of t

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated March 4, 2025 Commission File Number: 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated March 4, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (

Designated person notification

Exhibit 99.1 Designated person notification 14 February 2025, 10:30 CET With reference to Article 19(3) of Regulation (EU) No 596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse (Market Abuse Regulations), ArcelorMittal announces that notification of share transaction by a Designated Person (i.e. Directors or Executive Officers) is available in the Luxembourg St

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated February 14, 2025 Commission File Number: 001-35788 (T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated February 14, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembou

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated February 6, 2025 Commission File Number: 001-35788 (Tr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated February 6, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Address of princi

ARCELORMITTAL 6-K

ARCELORMITTAL 6-K Exhibit 99.1 ArcelorMittal reports fourth quarter 2024 and full year 2024 results Luxembourg, February 6, 2025 - ArcelorMittal (referred to as “ArcelorMittal” or the “Company” or the "Group") (MT (New York, Amsterdam, Paris, Luxembourg), MTS (Madrid)), the world’s leading integrated steel and mining company, today announced results1 for the three-month and twelve-month periods en

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated January 29, 2025 Commission File Number: 001-35788 (Tr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated January 29, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembour

ENDS

Exhibit 99.1 press release ArcelorMittal announces the publication of its fourth quarter and full year 2024 sell-side analyst consensus figures 28 January 2025, 16:45 CET ArcelorMittal (‘the Company’) today announces the publication of its fourth quarter and full year 2024 sell-side analyst consensus figures. The consensus figures are based on analysts’ estimates recorded on an external web-based

Designated person notification

Exhibit 99.1 press release Designated person notification 7 January 2025, 16:30 CET With reference to Article 19(3) of Regulation (EU) No 596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse (Market Abuse Regulations), ArcelorMittal announces that notifications of share transaction by a Designated Person (i.e. Directors or Executive Officers) are available in the

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated January 8, 2025 Commission File Number: 001-35788 (Tra

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated January 8, 2025 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated December 18, 2024 Commission File Number: 001-35788 (T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated December 18, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembou

Designated person notification

Exhibit 99.1 Designated person notification 18 December 2024, 17:45 CET With reference to Article 19(3) of Regulation (EU) No 596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse (Market Abuse Regulations), ArcelorMittal announces that notifications of share transaction by a Designated Person (i.e. Directors or Executive Officers) are available in the Luxembourg

ENDS

Exhibit 99.1 press release ArcelorMittal Announces Pricing of Bond Issue 10 December 2024, 19:00 CET ArcelorMittal priced yesterday an offering of €500,000,000 3.125 per cent notes due 13 December 2028 (the “2028 Notes”) and €500,000,000 3.500 per cent notes due 13 December 2031 (the “2031 Notes” and together with the 2028 Notes, the "Notes"). The Notes will be issued under ArcelorMittal’s €10,000

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated December 11, 2024 Commission File Number: 001-35788 (T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated December 11, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembou

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated December 6, 2024 Commission File Number: 001-35788 (Tr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated December 6, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembour

ENDS

Exhibit 99.1 ArcelorMittal announces financial calendar for 2025 6 December 2024, 08:30 CET ArcelorMittal today announces its financial calendar for 2025. Earnings results announcements: •6 February 2025: Q4 and full year 2024 •2 May 2025: Q1 2025 •31 July 2025: Q2 and half year 2025 •6 November 2025: Q3 2025 Annual General Meeting of Shareholders: •6 May 2025 ENDS About ArcelorMittal ArcelorMitta

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated November 27, 2024 Commission File Number: 001-35788 (T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated November 27, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembou

ENDS

Exhibit 99.1 ArcelorMittal provides update on its European decarbonization plans 26 November 2024, 08:30 CET ArcelorMittal is today providing an update on its decarbonization plans in Europe. The Company has previously announced the intention to invest in lower carbon emissions “hydrogen ready” DRI-EAF facilities to replace several blast furnaces across our European business, as a key strategic fi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated November 15, 2024 Commission File Number: 001-35788 (T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated November 15, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Address of princ

ARCELORMITTAL 6-K

ARCELORMITTAL 6-K EXHIBIT 99.1 ArcelorMittal reports third quarter 2024 results On November 7, 2024 - ArcelorMittal (referred to as “ArcelorMittal” or the “Company” or the "Group") (MT (New York, Amsterdam, Paris, Luxembourg), MTS (Madrid)), the world’s leading integrated steel and mining company, announced results1 for the three-month and nine-month periods ended September 30, 2024 (“3Q 2024” and

ARCELORMITTAL 6-K

ARCELORMITTAL 6-K Exhibit 99.1 ArcelorMittal reports third quarter 2024 results Luxembourg, November 7, 2024 - ArcelorMittal (referred to as “ArcelorMittal” or the “Company” or the “Group”) (MT (New York, Amsterdam, Paris, Luxembourg), MTS (Madrid)), the world’s leading integrated steel and mining company, today announced results1 for the three-month and nine-month periods ended September 30, 2024

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated November 7, 2024 Commission File Number: 001-35788 (Tr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated November 7, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Address of princi

ENDS

Exhibit 99.1 ArcelorMittal announces the publication of its third quarter 2024 sell-side analyst consensus figures 28 October 2024, 11:00 CET ArcelorMittal (‘the Company’) today announces the publication of its third quarter 2024 sell-side analyst consensus figures. The consensus figures are based on analysts’ estimates recorded on an external web-based tool provided and managed by an independent

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated October 28, 2024 Commission File Number: 001-35788 (Tr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated October 28, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembour

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated October 11, 2024 Commission File Number: 001-35788 (Tr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated October 11, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembour

ENDS

Exhibit 99.1 Nippon Steel agrees to sell its interest in Calvert to ArcelorMittal, at the request of NSC pursuant to its agreed acquisition of US Steel 11 October 2024, 08:30 CET ArcelorMittal (the “Company”, “Group”) announces it has entered into a definitive Equity Purchase Agreement (the “Agreement”) with Nippon Steel Corporation (“NSC”) pursuant to which ArcelorMittal will purchase NSC’s 50% e

ENDS

Exhibit 99.1 ArcelorMittal announces recommendations from dss+ workplace safety audit 9 October 2024, 08:00 CET ArcelorMittal (the 'Company' or the 'Group') has today published the recommendations of the comprehensive dss+ workplace safety audit that was commissioned at the end of 2023, against the backdrop of a clear necessity to strengthen Group safety performance. The audit, which was ongoing f

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated October 9, 2024 Commission File Number: 001-35788 (Tra

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated October 9, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT (Exact name of registrant as specified in its charter) Grand Duchy of Luxembourg 001-35788 Not applicable (Jurisdiction of incorporation or

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT ArcelorMittal (Exact name of registrant as specified in its charter) Grand Duchy of Luxembourg 001-35788 Not applicable (Jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 24-26, Boulevard d’Avranches, L-1160 Luxembourg Grand Duchy

XBRL INSTANCE DOCUMENT

iso4217:USD 0001243429 2023-01-01 2023-12-31 0001243429 country:BA 2023-01-01 2023-12-31 0001243429 country:BR 2023-01-01 2023-12-31 0001243429 country:CA 2023-01-01 2023-12-31 0001243429 country:KZ 2023-01-01 2023-12-31 0001243429 country:LR 2023-01-01 2023-12-31 0001243429 country:MX 2023-01-01 2023-12-31 0001243429 country:UA 2023-01-01 2023-12-31 0001243429 mt:RepublicOfSrpskaMember country:BA

XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT

BRAZIL Ministère des Finances du Québec [Member] Ministère des Finances du Québec Government of Alberta [Member] Government of Alberta DNPM – National Department of Mineral Production [Member] DNPM – National Department of Mineral Production San Jose [Member] San Jose Las Truchas [Member] Las Truchas Mine Liberia (Western Range Project) [Member] Mine Liberia (Western Range Project) Municipality of

Introduction 2 Basis of preparation 2 Overview of payments 4 Payments per government and project 4 Bosnia and Herzegovina 5 Brazil 5 Canada 5 Kazakhstan 6 Liberia 6 Mexico 6 Ukraine 7

Table of content Introduction 2 Basis of preparation 2 Overview of payments 4 Payments per government and project 4 Bosnia and Herzegovina 5 Brazil 5 Canada 5 Kazakhstan 6 Liberia 6 Mexico 6 Ukraine 7 1 Introduction ArcelorMittal has prepared this consolidated report (the "Report") on payments to governments with respect to its extractive activities in accordance with the European Union directives 2013/34/EU and 2013/50/EU (“EU Directives”) as transposed into the Luxembourg laws of December 18, 2015 and May 10, 2016 (the “Transparency Law”).

ENDS

Exhibit 99.1 ArcelorMittal holds investor day in India Event highlights India’s position as world’s fastest growing steel market and AM/NS India’s vision to become the benchmark for quality, scale and sustainability in Indian steelmaking 25 September 2024, 11:00 CET ArcelorMittal today hosted an investor day at AM/NS India’s flagship plant in Hazira, Gujarat. The event provided members of the inve

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated September 25, 2024 Commission File Number: 001-35788 (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated September 25, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembo

ENDS

Exhibit 99.1 ArcelorMittal completes acquisition of strategic stake in Vallourec 06 August 2024, 07:30 CET ArcelorMittal today announces that following the signature of a Share Purchase Agreement on 12 March 2024, and after the approval of relevant antitrust authorities and clearances under foreign investment regulations, it has completed the acquisition of 65,243,206 shares, representing c.28.41%

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated August 6, 2024 Commission File Number: 001-35788 (Tran

6-K 1 arcelormittalform6-kaugust.htm 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated August 6, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated August 5, 2024 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated August 5, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

ENDS

Exhibit 99.1 ArcelorMittal announces publication of its 2024 half-year report 02 August 2024, 18:00 CET ArcelorMittal (the ‘Company’) has today published its half-year report for the six-month period ended 30 June 2024. The report is available on http://corporate.arcelormittal.com/ under Investors > Financial reports > Half-year reports, and on the electronic database of the Luxembourg Stock Excha

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated August 2, 2024 Commission File Number 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated August 2, 2024 Commission File Number 001-35788 ARCELORMITTAL (Translation of Registrant’s name into English) 24-26, boulevard d’Avranches, L-1160 Luxembourg, Grand Duchy of Luxembourg (Address of princip

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated August 1, 2024 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated August 1, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Address of principa

ARCELORMITTAL 6-K

ARCELORMITTAL 6-K Exhibit 99.1 ArcelorMittal reports second quarter 2024 and half year 2024 results Luxembourg, August 1, 2024 - ArcelorMittal (referred to as “ArcelorMittal” or the “Company” or the “Group”) (MT (New York, Amsterdam, Paris, Luxembourg), MTS (Madrid)), the world’s leading integrated steel and mining company, today announced results1 for the three-month and six-month periods ended J

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated July 23, 2024 Commission File Number: 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated July 23, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (

ENDS

Exhibit 99.1 press release ArcelorMittal announces publication of its second quarter 2024 sell-side analyst consensus figures 23 July 2024, 16:00 CET ArcelorMittal (‘the Company’) today announces the publication of its second quarter 2024 sell-side analyst consensus figures. The consensus figures are based on analysts’ estimates recorded on an external web-based tool provided and managed by an ind

BR:ARMT34 / ArcelorMittal S.A. - Depositary Receipt (Common Stock) / BlackRock Inc. Passive Investment

SC 13G/A 1 lu1598757687070824.txt lu1598757687070824.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 1) ARCELORMITTAL - (Name of Issuer) Common Stock - (Title of Class of Securities) BYQMV15 - (SEDOL Number) June 30, 2024 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designa

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated July 1, 2024 Commission File Number: 001-35788 (Transl

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated July 1, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (A

ENDS

Exhibit 99.1 ArcelorMittal publishes its 2023 Payments to Governments in respect of Extractive Industries report 01 July 2024, 11:30 CET ArcelorMittal (’the Company’) has today filed its 2023 Payments to Governments in respect of Extractive Industries report, which provides a consolidated overview of payments made by the Company and its subsidiaries in 2023 to governments regarding its mining oper

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated June 17, 2024 Commission File Number: 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated June 17, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Address of principal

ARCELORMITTAL, as Company, WILMINGTON TRUST, NATIONAL ASSOCIATION, as Trustee, CITIBANK, N.A., as Securities Administrator Fifth Supplemental Indenture Dated as of June 17, 2024 U.S.$500,000,000 6.000% Notes due 2034 U.S.$500,000,000 6.350% Notes due

Exhibit 4.1 ARCELORMITTAL, as Company, WILMINGTON TRUST, NATIONAL ASSOCIATION, as Trustee, and CITIBANK, N.A., as Securities Administrator Fifth Supplemental Indenture Dated as of June 17, 2024 U.S.$500,000,000 6.000% Notes due 2034 U.S.$500,000,000 6.350% Notes due 2054 Supplement to the Senior Indenture dated as of June 1, 2015 providing for the issuance of Senior Debt Securities TABLE OF CONTEN

ENDS

Exhibit 99.1 press release Blackrock Inc. shareholding notification 12 June 2024, 18:30 CET ArcelorMittal (the ‘Company’) announces that on 12 June 2024 it received a shareholding notification from BlackRock Inc.. According to this notification, the following threshold of (potential) voting rights was reached: •4.99% on 10 June 2024. This notification is available in the Luxembourg Stock Exchange’

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated June 13, 2024 Commission File Number: 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated June 13, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (

$500,000,000 6.000% Notes Due 2034 $500,000,000 6.350% Notes Due 2054

TABLE OF CONTENTS  Filed pursuant to Rule 424(b)(5)  Registration No. 333-278551 PROSPECTUS SUPPLEMENT (To prospectus dated April 8, 2024) $500,000,000 6.000% Notes Due 2034 $500,000,000 6.350% Notes Due 2054 Pursuant to this prospectus supplement, ArcelorMittal is offering $500,000,000 aggregate principal amount of 6.000% notes due June 17, 2034 (the “Series 2034 Notes”) and $500,000,000 aggregat

Calculation of Filing Fee Table (Form Type) (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities

Exhibit 107 Calculation of Filing Fee Table 424(b)(5) (Form Type) ArcelorMittal (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Fees to Be Paid Debt 6.

ENDS

Exhibit 99.1 press release ArcelorMittal Announces Pricing of Bond Issue 11 June 2024, 08:00 CET ArcelorMittal (‘the Company’ or ‘the Issuer’) priced yesterday an offering of US$500 million aggregate principal amount of 6.00% notes due 17 June 2034 and US$500 million aggregate principal amount of 6.35% notes due 17 June 2054 (the ‘Notes’). The net proceeds to ArcelorMittal (before expenses), amoun

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated June 11, 2024 Commission File Number: 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated June 11, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Address of principal

Final Term Sheet $500,000,000 6.000% Notes due June 17, 2034

Filed Pursuant to Rule 433 Registration No. 333-278551 Term Sheet dated June 10, 2024, supplementing the Preliminary Prospectus Supplement dated June 10, 2024 Final Term Sheet ArcelorMittal $500,000,000 6.000% Notes due June 17, 2034 This final term sheet dated June 10, 2024, relates only to the securities described below and should be read together with the preliminary prospectus supplement dated

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated June 11, 2024 Commission File Number: 001-35788 (Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated June 11, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (

Underwriting Agreement June 10, 2024

Exhibit 99.1 Execution Version Underwriting Agreement June 10, 2024 J.P. Morgan Securities LLC 383 Madison Avenue New York, NY 10179 BofA Securities, Inc. 114 W47th Street NY8-114-07-01 New York, NY 10036 Citigroup Global Markets Inc. 388 Greenwich Street New York, NY 10013 Goldman Sachs & Co. LLC 200 West Street New York, NY 10282 RBC Capital Markets, LLC Brookfield Place 200 Vesey Street, 8th Fl

$        % Notes Due $        % Notes Due

TABLE OF CONTENTS The information in this preliminary prospectus supplement is not complete and may be changed.

ARCELORMITTAL 6-K

ARCELORMITTAL 6-K Exhibit 99.1 ArcelorMittal reports first quarter 2024 results On May 2, 2024 - ArcelorMittal (referred to as “ArcelorMittal” or the “Company” or the "Group") (MT (New York, Amsterdam, Paris, Luxembourg), MTS (Madrid)), the world’s leading integrated steel and mining company, announced results1 for the three-month period ended March 31, 2024 (“1Q 2024”). 1Q 2024 key highlights: ●

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 28, 2024 Commission File Number: 001-35788 (Transl

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 28, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Address of principal

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report ArcelorMittal (Exact name of registrant as specified in its charter) Grand Duchy of Luxembourg 001-35788 Not applicable (State or other jurisdiction of incorporation) (Commission File Number) (I.R.S. Employer Identification No.) 24-26, boulevard d’Avranches L-1160 Luxembourg Grand Duchy of

ARCELORMITTAL 6-K

ARCELORMITTAL 6-K Exhibit 99.2 ArcelorMittal reports first quarter 2024 results Luxembourg, May 2, 2024 - ArcelorMittal (referred to as “ArcelorMittal” or the “Company” or the "Group") (MT (New York, Amsterdam, Paris, Luxembourg), MTS (Madrid)), the world’s leading integrated steel and mining company, today announced results1 for the three-month period ended March 31, 2024. 1Q 2024 key highlights:

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 2, 2024 Commission File Number: 001-35788 (Transla

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated May 2, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Address of principal e

ENDS

ARCELORMITTAL 6-K Exhibit 99.1 press release ArcelorMittal announces results of its General Meeting 30 April 2024, 18:15 CET The Annual General Meeting (‘General Meeting’) of shareholders of ArcelorMittal held today in Luxembourg approved all resolutions by a strong majority. 78.47% of the voting rights were represented at the General Meeting. The results of the votes will be posted shortly on www

ENDS

Exhibit 99.1 ArcelorMittal announces the publication of its first quarter 2024 sell-side analyst consensus figures 26 April 2024, 12:00 CET ArcelorMittal (‘the Company’) today announces the publication of its first quarter 2024 sell-side analyst consensus figures. The consensus figures are based on analysts’ estimates recorded on an external web-based tool provided and managed by an independent co

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated April 29, 2024 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated April 29, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated April 23, 2024 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated April 23, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

ENDS

Exhibit 99.1 press release ArcelorMittal publishes its 2023 Integrated Annual Review 23 April 2024, 14:45 CET Today, ArcelorMittal (‘the company’) published its 2023 Integrated Annual Review (‘IAR’), which can be accessed here annualreview2023.arcelormittal.com. The 2023 IAR, ‘Preparing for the future’, is structured in nine main chapters: •Our business and material issues •Driving change in our s

ENDS

Exhibit 99.1 press release ArcelorMittal publishes interim update on its company-wide safety audit 10 April 2024, 16:45 CET ArcelorMittal (‘the Company’) announced in December 2023 that it had engaged dss+, a leading provider of sustainable operations management consulting services, to conduct a company-wide audit of its safety practices. Today, it shares a first interim update about what has been

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated April 10, 2024 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated April 10, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

UNITED STATES SECURITIES AND EXCHANGE COMMISSION D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated April 8, 2024 Commission File Number: 001-35788 (Translation of re

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated April 8, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg (Address of principal

CAPITALIZATION AND INDEBTEDNESS

Exhibit 99.1 CAPITALIZATION AND INDEBTEDNESS The following table sets out the consolidated capitalization and indebtedness of ArcelorMittal as of December 31, 2023. You should read this table together with the Group’s consolidated financial statements and other financial data appearing in its annual report on Form 20-F for the year ended December 31, 2023. As of December 31, 2023 (amounts in U.S.$

Calculation of Filing Fee Table FORM F-3 (Form Type) (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities

EXHIBIT 107 Calculation of Filing Fee Table FORM F-3 (Form Type) ArcelorMittal (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forw

Recent Developments

Exhibit 99.2 Recent Developments ArcelorMittal publishes convening notice for its Annual General Meeting and Extraordinary General Meeting of shareholders On March 29, 2024, ArcelorMittal (the “Company”) announced the publication of the convening notice for its Annual General Meeting of shareholders (the “General Meeting”), which will be held on April 30, 2024 at 3 p.m. CET at the Company's regist

As filed with the Securities and Exchange Commission on April 8, 2024

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on April 8, 2024 Registration No.

CONSENT OF QUALIFIED PERSON

Exhibit 23.13 CONSENT OF QUALIFIED PERSON Re: Registration statement on Form F-3 l, Paul Grant Obermeyer, an employee of and Principal Geologist at VBKOM (Pty) Ltd, in connection with the registration statement on Form F-3 of ArcelorMittal (the “Registration Statement”): a) consent to the use of and references to my name, including my status as an expert or “qualified person” (as defined in Subpar

CONSENT OF QUALIFIED PERSON

Exhibit 23.11 CONSENT OF QUALIFIED PERSON Re: Registration statement on Form F-3 SLR Consulting (Canada) Ltd. (“SLR”), in connection with the registration statement on Form F-3 of ArcelorMittal (the “Registration Statement”): a) consents to the use of and references to our name, including our status as an expert or “qualified person” (as defined in Subpart 1300 of Regulation S-K promulgated by the

ArcelorMittal Debt Securities Debt Securities Convertible into Ordinary Shares Ordinary Shares Rights to Purchase Ordinary Shares Underwriting Agreement Standard Provisions

Exhibit 1.1 ArcelorMittal Debt Securities Debt Securities Convertible into Ordinary Shares Ordinary Shares Rights to Purchase Ordinary Shares Underwriting Agreement Standard Provisions From time to time, ArcelorMittal, a Luxembourg société anonyme (the “Company”), may enter into one or more underwriting agreements in the form of Annex A hereto that incorporate by reference these Standard Provision

CONSENT OF QUALIFIED PERSON

Exhibit 23.8 CONSENT OF QUALIFIED PERSON Re: Registration statement on Form F-3 GE21 Consultoria Mineral (“GE21”), in connection with the registration statement on Form F-3 of ArcelorMittal (the “Registration Statement”): a) consent to the use of and references to our name, including our status as an expert or “qualified person” (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S.

CONSENT OF QUALIFIED PERSON

Exhibit 23.14 CONSENT OF QUALIFIED PERSON Re: Registration statement on Form F-3 LLC «KAI», in connection with the registration statement on Form F-3 of ArcelorMittal (the “Registration Statement”): a) consents to the use of and references to our name, including our status as an expert or “qualified person” (as defined in Subpart 1300 of Regulation S-K promulgated by the U.S. Securities and Exchan

CONSENT OF QUALIFIED PERSON

Exhibit 23.10 CONSENT OF QUALIFIED PERSON Re: Registration statement on Form F-3 I, Michael Spleit, an employee of ArcelorMittal and a mining engineer with over 15 years’ experience in the mineral resource industry with a master’s degree in mining engineering from McGill University, in connection with the registration statement on Form F-3 of ArcelorMittal (the “Registration Statement”): a) consen

CONSENT OF QUALIFIED PERSON

Exhibit 23.12 CONSENT OF QUALIFIED PERSON Re: Registration statement on Form F-3 SLR Consulting (Canada) Ltd. (“SLR”), in connection with the registration statement on Form F-3 of ArcelorMittal (the “Registration Statement”): a) consents to the use of and references to our name, including our status as an expert or “qualified person” (as defined in Subpart 1300 of Regulation S-K promulgated by the

CONSENT OF QUALIFIED PERSON

Exhibit 23.9 CONSENT OF QUALIFIED PERSON Re: Registration statement on Form F-3 I, Ravindra Sharma, in connection with the registration statement on Form F-3 of ArcelorMittal (the “Registration Statement”): a) 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 E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 ¨ Check if an Application to Determine Eligibility of a Trustee Pursuant to Section 305(b)(2) WILMINGTON TRUST, NATIONAL ASSOCIATION (Exact name of trustee as specified

Exhibit 25.1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 ¨ Check if an Application to Determine Eligibility of a Trustee Pursuant to Section 305(b)(2) WILMINGTON TRUST, NATIONAL ASSOCIATION (Exact name of trustee as specified in its charter) 16-1486454 (I.R.S. employer identification no.) 1100 North Market Street Wilmington, DE 19890-0001 (Address of principal

Božo Kolonja DMD Consulting doo & University of Belgrade - Faculty of Mining and Geology Focanska 1, 11000 Beograd, Serbia Email: [email protected] CONSENT OF QUALIFIED PERSON

Exhibit 23.7 Božo Kolonja DMD Consulting doo & University of Belgrade - Faculty of Mining and Geology Focanska 1, 11000 Beograd, Serbia Email: [email protected] CONSENT OF QUALIFIED PERSON Re: Registration statement on Form F-3 I, Bozo Kolonja, in connection with the registration statement on Form F-3 of ArcelorMittal (the “Registration Statement”): a) consent to the use of and references

ENDS

Exhibit 99.1 ArcelorMittal publishes convening notice for its Annual General Meeting of shareholders 29 March 2024, 08:00 CET ArcelorMittal (the ‘Company’) announces the publication of the convening notice for its Annual General Meeting of shareholders (the ‘General Meeting’), which will be held on 30 April 2024 at 3 p.m. CET at the Company’s registered office, 24-26, boulevard d’Avranches, L-1160

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated March 29, 2024 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated March 29, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated March 28, 2024 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated March 28, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated March 28, 2024 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated March 28, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

ENDS

Exhibit 99.1 Designated person notification 28 March 2024, 12:15 CET With reference to Article 19(3) of Regulation (EU) No 596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse (Market Abuse Regulations), ArcelorMittal announces that a notification of share transaction by a Designated Person (i.e. Directors or Executive Officers) is available in the Luxembourg Sto

ENDS

Exhibit 99.1 ArcelorMittal announces publication of the 2023 statutory financial statements of ArcelorMittal parent company 27 March 2024, 20:15 CET ArcelorMittal has published the statutory financial statements of ArcelorMittal parent company for the year ended 31 December 2023. These financial statements have been filed with the electronic database of the Luxembourg Stock Exchange (www.bourse.lu

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated March 27, 2024 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated March 27, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

ENDS

Exhibit 99.1 ArcelorMittal publishes revised analyst model per new segmental reporting 27 March 2024, 10:30 CET As announced with ArcelorMittal’s (‘the Company’) fourth quarter 2023 financial results, the Company has amended its presentation of reportable segments and EBITDA. The changes, applied from January 1, 2024, are as follows: •EBITDA is defined as operating result plus depreciation, impair

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated March 19, 2024 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated March 19, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

ENDS

Exhibit 99.1 Designated person notification 18 March 2024, 18:00 CET With reference to Article 19(3) of Regulation (EU) No 596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse (Market Abuse Regulations), ArcelorMittal announces that a notification of share transaction by a Designated Person (i.e. Directors or Executive Officers) is available in the Luxembourg Sto

ENDS

Exhibit 99.1 ArcelorMittal announces Kleber Silva to be new CEO of ArcelorMittal Mining 19 March 2024, 10:00 CET ArcelorMittal, the world’s leading steel and mining company, today announces that Kleber Silva is nominated Executive Vice President of ArcelorMittal and appointed as Chief Executive Officer of ArcelorMittal Mining, effective 08 April 2024. Kleber will report to Aditya Mittal, Chief Exe

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated March 19, 2024 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated March 19, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated March 13, 2024 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated March 13, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

ENDS

Exhibit 99.1 ArcelorMittal acquires strategic stake in Vallourec 12 March 2024, [2200 CET] ArcelorMittal (the ‘Company’) today announces that it has signed a Share Purchase Agreement to acquire 65,243,206 shares, representing c.28.4% equity interest in Vallourec, for €14.64 per share from Funds managed by Apollo Global Management, Inc., for a total consideration of approximately €955 million. Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated March 12, 2024 Commission File Number: 001-35788 (Tran

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated March 12, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembourg

ENDS

Exhibit 99.1 Designated person notification 11 March 2024, 18:30 CET With reference to Article 19(3) of Regulation (EU) No 596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse (Market Abuse Regulations), ArcelorMittal announces that a notification of share transaction by a Designated Person (i.e. Directors or Executive Officers) is available in the Luxembourg Sto

ENDS

Exhibit 99.2 ArcelorMittal publishes its Annual Report 2023 on Form 20-F 28 February 2024, 20:55 CET ArcelorMittal has filed its Annual Report 2023 on Form 20-F with the U.S. Securities and Exchange Commission (SEC). The report is now available at http://corporate.arcelormittal.com > Financial reports. ArcelorMittal will send a hard copy of the Form 20-F Annual Report for 2023, which includes the

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Dated February 29, 2024 Commission File Number: 001-35788 (T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ————————— FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 ————————— Dated February 29, 2024 Commission File Number: 001-35788 ARCELORMITTAL (Translation of registrant’s name into English) 24-26, Boulevard d’Avranches L-1160 Luxembourg Grand Duchy of Luxembou

ENDS

Exhibit 99.1 ArcelorMittal announces the publication of its 2023 annual report 28 February 2024, 21:40 CET ArcelorMittal has published its annual report for the year ended 31 December 2023. The report has been filed with the electronic database of the Luxembourg Stock Exchange (www.bourse.lu) and is available at http://corporate.arcelormittal.com > Financial reports ENDS About ArcelorMittal Arcelo

CONSENT OF QUALIFIED PERSON

Exhibit 15.9 CONSENT OF QUALIFIED PERSON Re: Form 20-F of ArcelorMittal S.A. (the "Company") SLR Consulting (Canada) Ltd. ("SLR"), in connection with the Company's Annual Report on Form 20-F for the year ended December 31, 2023 (the "2023 20-F"): a.certifies that we have supervised and validated the preparation of the Mineral Resource and Mineral Reserve estimates for the Las Truchas Mine and San

CONSENT OF QUALIFIED PERSON

Exhibit 15.8 CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal I, Michael Spleit, an employee of ArcelorMittal, am a mining engineer with over 15 years' experience in the mineral resource industry and a master's degree in mining engineering from McGill University. I have performed personal inspections of ArcelorMittal Liberia's Mt. Tokadeh, Mt. Gangra, and Mt. Yuelliton d

Clawback Policy

Exhibit 97.1 Clawback Policy Background ArcelorMittal (the “Company”) is listed on several stock exchanges, including the New York Stock Exchange (“NYSE”). Therefore, the Company is considered a “foreign private issuer” in the United States and is required to publish, in addition to its statutory annual report, an annual report on Form 20-F, which is filed each year with the U.S. Securities and Ex

CONSENT OF QUALIFIED PERSON

Exhibit 15.7 CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20-F of ArcelorMittal I, Ravindra Sharma, in connection with ArcelorMittal’s Annual Report on Form 20-F for the year ended December 31, 2023 (the “2023 20-F”): a) certify that I have supervised and validated the preparation of the mineral resources and mineral reserves for the Thakurani Iron Ore Mine, India; b) consent to the use o

CONSENT OF QUALIFIED PERSON

Exhibit 15.12 CONSENT OF QUALIFIED PERSON Re: Annual Report on Form 20 -F of ArcelorMittal LLC «KAI», in connection with ArcelorMittal's Annual Report on Form 20-F for the year ended December 31, 2023 (the "2023 20-F"): a) certifies that we have supervised and validated the preparation of the mineral reserves and mineral resources estimates for ArcelorMittal Kryvyi Rih Open Pit; b) consents to the