ArcelorMittal : US proxy card – English (e665289 arcelormittal card 9x final)

Annual General Meeting and Extraordinary General Meeting of Shareholders 2026 PROXY - Annual General Meeting and Extraordinary General Meeting of Shareholders ArcelorMittal This proxy card must be received by Citibank, N.A., at the address indicated below, prior to 10:00 A.M. (New York time) on April 27, 2026 for action to be taken. ArcelorMittal, a corporation organized under the laws of Luxembourg Ordinary Shares - Proxy Annual General Meeting and Extraordinary General Meeting of Shareholders to be held on May 5, 2026 at 11:00 A.M. (CET) at the offices of ArcelorMittal at 24-26, boulevard d'Avranches, L-1160 Luxembourg, Grand-Duchy of Luxembourg (the "General Meetings"). THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF ARCELORMITTAL FOR THE GENERAL MEETINGS

The undersigned, who is the holder of record of the Ordinary Shares of New York Registry of ArcelorMittal identified above, hereby acknowledges receipt of the Convening Notice for the General Meetings and hereby appoints Citibank, N.A. through its agents, with full power of substitutions, on behalf and in the name of the undersigned to represent the undersigned at the General Meetings to be held on May 5, 2026 at 11:00 A.M. (CET) and at any adjournment or adjournments thereof, and to vote all Ordinary Shares of New York Registry which the undersigned would be entitled to vote if then and there present on the matters and in the manner set forth on the reverse of this proxy card hereby revoking any proxy previously given.

IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR THE GENERAL MEETINGS TO BE HELD ON MAY 5, 2026 A copy of the documentation related to the General Meetings is available on ArcelorMittal's website https://www.arcelormittal.com under "Investors - Equity investors - Shareholders events - AGM - General Meetings of shareholders, 5 May 2026".

The New York Registrar and Transfer Agent's Notice of General Meetings, the form of proxy card and the Agenda (included in the Convening Notice) of the General Meetings are also available at the above internet address.

This proxy will be automatically invalidated if the undersigned was not the holder of record of the referenced Ordinary Shares of New York Registry on April 21, 2026 (the "Voting Record Date").

Please indicate on the reverse side of this proxy card how your shares are to be voted. This proxy card must be marked, signed and returned to Citibank, N.A. prior to 10:00 A.M. (New York time) on April 27, 2026, in order to be counted. If this proxy card is signed and timely returned to Citibank, N.A. but no specific direction as to voting is marked as to an issue, the undersigned shall be deemed to have given a proxy to vote "FOR" all Proposals and as said proxies deem advisable on all other matters as may come before the General Meetings.

Agenda and Proposed Resolutions of the Annual General Meeting

1. Presentation of the management report of the board of directors of the Company (the "Board of Directors") and the reports of the independent auditor on the financial statements of the Company (the "Parent Company Financial Statements") and the consolidated financial statements of the ArcelorMittal group (the "Consolidated Financial Statements") for the financial year 2025 in each case prepared in accordance with the International Financial Reporting Standards ("IFRS") as adopted by the European Union.

2. Approval of the Consolidated Financial Statements for the financial year 2025

   Draft resolution (Resolution I)

3. Approval of the Parent Company Financial Statements for the financial year 2025

   Draft resolution (Resolution II)

4. Allocation of results and determination of the dividend and the remuneration of the members of the Board of Directors in relation to the financial year 2025

   Draft resolution (Resolution III) Draft resolution (Resolution IV)

5. Resolutions concerning the Remuneration Report for the year 2025

   Draft resolution (Resolution V) Draft resolution (Resolution VI) Draft resolution (Resolution VII)

6. Discharge of the members of the Board of Directors

   Draft resolution (Resolution VIII)

7. Election of members of the Board of Directors

   Draft resolution (Resolution IX) Draft resolution (Resolution X) Draft resolution (Resolution XI) Draft resolution (Resolution XII) Draft resolution (Resolution XIII) Draft resolution (Resolution XIV)

8. Appointment of an independent auditor in relation to (i) the Parent Company Financial Statements and the Consolidated Financial Statements for the financial year 2026 and (ii) the assurance opinion on sustainability reporting to be included in the management report of the Board of Directors for the financial year 2026 if and as required

   Draft resolution (Resolution XV)

9. Authorisation of grants of share-based incentives

Draft resolution (Resolution XVI)

Agenda and Proposed Resolutions of the Extraordinary General Meeting

1. Decision to cancel shares and to consequently reduce the issued share capital following the cancellation of shares repurchased under its share buyback program

   Draft resolution (EGM Resolution I)

2. Decision to renew the authorization given to the Board of Directors to increase the share capital of the Company, limit or suspend the preferential subscription right of existing shareholders, and amend article 5.5 of the Articles accordingly

   Draft resolution (EGM Resolution II)

3. Decision to amend articles 5, 7, 8, 11, 17 and 19 of the Articles to reflect the current numbering of the provisions of the Luxembourg law of 10 August 1915 on commercial companies, update references to legal documents which are no longer in force and make certain clean-up and drafting changes

Draft resolution (EGM Resolution III)

A Issues ArcelorMittal

Annual General Meeting

Agenda Items

For Against Abstain

1

2

3

4

5

6

[No vote] [Resolution I] [Resolution II] [Resolution III] [Resolution IV] [Resolution V] [Resolution VI] [Resolution VII] [Resolution VIII]

For Against Abstain		For	Against Abstain
7 [Resolution IX]	1			[EGM Resolution I]
[Resolution X]	2			[EGM Resolution II]
[Resolution XI]	3			[EGM Resolution III]
[Resolution XII]
[Resolution XIII]
[Resolution XIV]
8 [Resolution XV] 9 [Resolution XVI]

Agenda Items

Extraordinary General Meeting

Agenda Items

B Authorized Signatures - Sign Here - This section must be completed for your instructions to be executed.

If this Proxy Card is signed and timely returned to the NY Registrar and Transfer Agent but no specific direction as to voting is marked above as to an issue, the undersigned shall be deemed to have given a proxy "FOR" the unmarked issue and as the proxy holder(s) deem advisable on all other matters that may come before the General Meetings.

If this Proxy Card is signed and timely returned to the NY Registrar and Transfer Agent but multiple specific directions as to voting are marked above as to an issue, the undersigned shall be deemed to have given a proxy to give an "ABSTAIN" voting instruction for such issue.

Please be sure to sign and date this Proxy Card.

Please sign your name to this Proxy Card exactly as printed. When signing in a fiduciary or representative capacity, give full title as such. Where more than one owner, each MUST sign. Proxy Cards executed by a corporation should be in full name by a duly authorized officer with full title as such.

Signature 1 - Please keep signature within the line Signature 2 - Please keep signature within the line Date (mm/dd/yyyy)