# EDGAR Filing Document

**Accession Number:** 0001566817
**File Stem:** 0001999371-26-006457
**Filing Date:** 2026-3
**Character Count:** 51438
**Document Hash:** 611bcdcb56e0a2dc47932f19a26a3611
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001999371-26-006457.hdr.sgml**: 20260319

**ACCESSION NUMBER**: 0001999371-26-006457

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 6

**FILED AS OF DATE**: 20260319

**DATE AS OF CHANGE**: 20260319

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ArcelorMittal
- **CENTRAL INDEX KEY:** 0001243429
- **STANDARD INDUSTRIAL CLASSIFICATION:** STEEL WORKS, BLAST FURNACES  ROLLING MILLS (COKE OVENS) [3312]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 000000000
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-83371
- **FILM NUMBER:** 26774735

**BUSINESS ADDRESS:**
- **STREET 1:** 24-26, BOULEVARD D?AVRANCHES
- **STREET 2:** L-1160 LUXEMBOURG
- **CITY:** GRAND DUCHY OF LUXEMBOURG
- **STATE:** N4
- **ZIP:** 00000
- **BUSINESS PHONE:** 35247922151

**MAIL ADDRESS:**
- **STREET 1:** 24-26, BOULEVARD D?AVRANCHES
- **STREET 2:** L-1160 LUXEMBOURG
- **CITY:** GRAND DUCHY OF LUXEMBOURG
- **STATE:** N4
- **ZIP:** 00000

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ARCELOR
- **DATE OF NAME CHANGE:** 20030618
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** LUMEN INVESTMENTS S.A R.L.
- **CENTRAL INDEX KEY:** 0001566817

**ORGANIZATION NAME:**
- **EIN:** 000000000

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**BUSINESS ADDRESS:**
- **STREET 1:** 6, RUE EUGENE RUPPERT
- **STREET 2:** L- 2453 LUXEMBOURG
- **CITY:** LUXEMBOURG
- **STATE:** N4
- **ZIP:** 0000
- **BUSINESS PHONE:** 352 26 449 531

**MAIL ADDRESS:**
- **STREET 1:** 6, RUE EUGENE RUPPERT
- **STREET 2:** L- 2453 LUXEMBOURG
- **CITY:** LUXEMBOURG
- **STATE:** N4
- **ZIP:** 0000

## Ex-7

**Exhibit 7**

**SHARE REPURCHASE AGREEMENT**

**between**

**Lumen Investments S.à r.l.**

**and**

**ArcelorMittal**

**THIS SHARE REPURCHASE AGREEMENT (the "Agreement") is made on 5 March 2026 by and between:**

(1) **Lumen Investments S. à r. l.**,
 a limited liability company *(société à responsabilité limitée),* incorporated and existing under the laws of the Grand Duchy of Luxembourg, with registered
 office at 28 Boulevard F.W. Raiffeisen, L-1160 Luxembourg, Grand Duchy of Luxembourg, and
 registered with the Luxembourg Register of Commerce and Companies under number B152.437 (the
 "Seller"); and

(2) **ArcelorMittal,** a Luxembourg *société anonyme* incorporated and existing under the laws
 of the Grand Duchy of Luxembourg, having its registered office at 24-26, Boulevard d'Avranches,
 L-1160 Luxembourg, Grand Duchy of Luxembourg, and registered with the Luxembourg Register
 of Commerce and Companies under number B82.454 (the "Purchaser" and, together
 with the Seller, the "Parties").

**RECITALS:**

(A) The
 Purchaser announced on 7 April 2025 a Share buy-back program with Share repurchases to be
 conducted in tranches that may be announced through May 2030 (including a first tranche set
 for up to 10 million Shares (the "First Tranche") **)** (the "Program").

(B) In the context of the Program, the
Seller wishes to maintain the Significant Shareholder's holding of the Purchaser's issued and outstanding Shares (net of
treasury Shares) (and voting rights) at its current level of 44.6 percent. The Seller therefore intends to sell in the Program an equivalent
variable number of Shares, at the proportion of Significant Shareholder's current stake of 44.6 percent of issued and outstanding
Shares of the Purchaser, in accordance with the terms and conditions set forth herein.

(C) The Parties propose to enter into this
Agreement for the purpose of the repurchase from time to time by the Purchaser of Shares from the Seller under the Program.

**NOW IT IS HEREBY AGREED** as follows:

**Clause 1. Definitions.**

The following capitalized terms shall have the following meanings:

"Control" (including the correlative meanings of the terms "Controlled") means the ownership, directly or indirectly, of shares in an entity entitling the exercise of more than 50 percent of the voting rights in such entity.

"Share" means an ordinary share of the Purchaser.

"Significant Shareholder" means the trust (HSBC Trust (C.I.) Limited, as trustee) of which Mr. Lakshmi N. Mittal, Ms. Usha Mittal and their children are the beneficiaries, holding the Purchaser's Shares through (i) the Seller; and (ii) Nuavam Investments S.à r.l.

**Clause 2. Repurchase of Shares.**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.1. Subject to the terms and conditions of this Agreement, the Purchaser shall, on each trading day on which it has purchased Shares under the Program, purchase Shares from the Seller, and the Seller shall sell Shares to the Purchaser, in such number so that the number of Shares that shall be purchased under this Agreement during that trading day shall equal 44.6 percent of the aggregate of the Shares purchased during that trading day, both (i) under the Program (other than from the Seller) and (ii) from the Seller.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.2. Shares of the Purchaser repurchased under this Agreement during any trading day shall be repurchased at the same weighted average price as the Shares of Purchaser purchased under the Program on the relevant trading day in the open market.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.3. For settlement purposes, repurchases initiated under this Agreement over each period of five consecutive trading days (the "Settlement Period") will be aggregated and jointly settled two trading days after each such Settlement Period. Notwithstanding any provision to the contrary, the Seller shall retain full ownership in respect of any Shares sold hereunder pending their settlement. Notwithstanding the foregoing, the settlement and the transfer of ownership of any Shares shall be postponed for so long as such settlement would cause the Significant Shareholder to hold less than one-third of all voting rights in the Purchaser (including those in respect of Shares held in treasury by or on behalf of Purchaser or the subsidiaries of the Purchaser).

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.4. Upon each settlement of Shares pursuant to this Agreement: (i) the Seller shall deliver a letter to the Purchaser ordering the transfer of the relevant number of Shares to the Purchaser in the share registry of the Purchaser and (ii) the Purchaser shall carry out a wire transfer of the purchase price for such Shares in immediately available funds to an account designated by the Seller.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.5. The Seller and the Purchaser agree that their commitment to, respectively, sell and buy the Shares in accordance with this Clause 2 constitutes an irrevocable commitment and, accordingly, may not be withdrawn by either Party during the duration of this Agreement, nor may the volume or the price of the Shares be changed at the request of either Party.

**Clause 3. Representations and Warranties.**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.1. Each of the Purchaser and the Seller represents and warrants to the other that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) it has full power to execute and deliver
this Agreement, to enter into the transactions contemplated hereby and to perform its obligations hereunder;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) it has taken all necessary action to
authorize such execution, delivery and performance;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) this Agreement constitutes its legal,
valid and binding obligation enforceable against it in accordance with its terms, subject to applicable bankruptcy, insolvency, fraudulent
conveyance, reorganization, moratorium and similar laws affecting creditors' rights and remedies generally; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iv) the execution, delivery and performance
of this Agreement does not and will not violate, contravene, or constitute a default under, (A) its articles of incorporation, (B) any
laws, rules or regulations of any governmental authority to which it is subject, (C) any contracts,
agreements or instrument to which it is a party or (D) any judgment, injunction, order or decree by which it is bound.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.2. The representations and warranties of the Seller and the Purchaser under this Clause 3 shall remain in full force and effect at all times during the term of this Agreement and shall survive the termination for any reason of this Agreement.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.3. Each of the Purchaser and the Seller represents and warrants to the other that on the date of this Agreement, it is not aware of any inside information within the meaning of EU Regulation 596/2014 in relation to the Purchaser

**Clause 4. Duration of the Agreement.**

This Agreement will terminate on the termination of the Program; provided, however, that at any time following the completion of the First Tranche, the Seller may elect to terminate this Agreement by delivering written notice thereof to the Purchaser, so long as such notice is delivered at least five (5) business days prior to the proposed termination date. No termination pursuant to the preceding sentence shall become effective on any day on which the Purchaser is effecting repurchases of Shares under the Program, and any such termination shall instead become effective on the next business day on which no such Share repurchases are being effected. Any termination of this Agreement shall be without prejudice to the settlement of any repurchases initiated prior to such termination.

**Clause 5. Assignment.**

Subject to giving notice thereof to the Purchaser, the Seller may assign its rights and obligations under the present Agreement without the consent of the Purchaser to any other entity which is Controlled by the Seller or by which the Seller is Controlled or with which the Seller is under common Control, and which shall thereupon replace the Seller as Party under the Agreement.

Except as contemplated in the foregoing paragraph, none of the Parties may assign their rights and obligations hereunder to any other person except within the prior written consent of the other Party.

**Clause 6. Notices.**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6.1 All notices and other communications hereunder shall be in writing and shall be deemed to have been duly given when received.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6.2 All such notices and other communications shall be directed to the following address:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) If to the Purchaser to: <br>
24-26, Boulevard
d'Avranches <br>
L-1160 Luxembourg <br>
Grand Duchy of Luxembourg

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) If to the Seller to: <br>
28, Boulevard
F.W. Raiffeisen <br>
L-1160 Luxembourg <br>
Grand Duchy of Luxembourg

or at such other address as may be designated by a Party by written notice to the other Party.

**Clause 7. Governing law; Submission to jurisdiction.**

This Agreement shall be governed by and construed in accordance with the laws of the Grand Duchy of Luxembourg. Each Party irrevocably agrees that the courts of Luxembourg-City have sole and exclusive jurisdiction to decide and to settle any dispute or claim arising out of or relating to this Agreement.

**Clause 8. Counterparts.**

This Agreement may be executed in any number of counterparts, each of which when executed and delivered shall be an original, but all the counterparts together shall constitute one and the same instrument. No counterpart shall be effective until each Party has executed at least one counterpart.

IN WITNESS WHEREOF, the Parties hereto have executed this Agreement as of the date and year first written above.

The Seller

/s/ Emilija Vabuolaite - Velickiene

------

Lumen Investments S.à r.l.

By: Emilija Vabuolaite Velickiene

Title: Class A Manager

By: Aurelie Rubler

Title: Class A Manager

The Purchaser

---

| | |
|:---|:---|
| /s/ Henk Scheffer<br>ArcelorMittal<br> By: Henk Scheffer<br> Title: Group Compliance & Data Protection Officer<br> Company Secretary | /s/ Raman Karol<br>Raman Karol  |

---

## Ex-8

**Exhibit 8**

**SCHEDULE A**<br>

**ADDITIONAL INFORMATION CONCERNING HSBC TRUSTEE (C.I.) LIMITED** 

---

| | | | | |
|:---|:---|:---|:---|:---|
| &nbsp;&nbsp;**Name** | &nbsp;&nbsp;**Business Address** | &nbsp;&nbsp;**Present Principal Occupation or Employment** | &nbsp;&nbsp;**Name, Principal Business and Address of Principal Employment** | &nbsp;&nbsp;**Citizenship** |
| &nbsp;&nbsp;Brent Edward York | &nbsp;&nbsp;HSBC House, Esplanade, St Helier, Jersey, JE1 1GT | &nbsp;&nbsp;Director | &nbsp;&nbsp;HSBC Trustee (C.I.) Limited, Trust Company as regulated by the JFSC | &nbsp;&nbsp;New Zealand |
| &nbsp;&nbsp;Farah Ana Ballands | &nbsp;&nbsp;HSBC House, Esplanade, St Helier, Jersey, JE1 1GT | &nbsp;&nbsp;Director/Non-executive chair | &nbsp;&nbsp;HSBC Trustee (C.I.) Limited, Trust Company as regulated by the JFSC | &nbsp;&nbsp;Jersey |
| &nbsp;&nbsp;Christopher Marc Jones | &nbsp;&nbsp;HSBC House, Esplanade, St Helier, Jersey, JE1 1GT | &nbsp;&nbsp;Director | &nbsp;&nbsp;HSBC Trustee (C.I.) Limited, Trust Company as regulated by the JFSC | &nbsp;&nbsp;British |

---

## Ex-9

**Exhibit 9**

**SCHEDULE B**<br>

**ADDITIONAL INFORMATION CONCERNING GRANDEL PTE. LTD** 

---

| | | | | |
|:---|:---|:---|:---|:---|
| &nbsp;&nbsp;**Name** | &nbsp;&nbsp;**Business Address** | &nbsp;&nbsp;**Present Principal Occupation or Employment** | &nbsp;&nbsp;**Name, Principal Business and Address of Principal Employment** | &nbsp;&nbsp;**Citizenship** |
| &nbsp;&nbsp;Sanjay Shukla | &nbsp;&nbsp;101 Cecil Street, #18-08, Tong Eng Building, Singapore 069533 | &nbsp;&nbsp;Director | &nbsp;&nbsp;Grandel Pte. Ltd., 101 Cecil Street, #18-08, Tong Eng Building, Singapore 069533 | &nbsp;&nbsp;Indian |
| &nbsp;&nbsp;Jaswinder Kaur | &nbsp;&nbsp;101 Cecil Street, #18-08, Tong Eng Building, Singapore 069533 | &nbsp;&nbsp;Director | &nbsp;&nbsp;Grandel Pte. Ltd., 101 Cecil Street, #18-08, Tong Eng Building, Singapore 069533 | &nbsp;&nbsp;Singaporean |
| &nbsp;&nbsp;Maheswari Rajendran | &nbsp;&nbsp;101 Cecil Street, #18-08, Tong Eng Building, Singapore 069533 | &nbsp;&nbsp;Secretary | &nbsp;&nbsp;Grandel Pte. Ltd., 101 Cecil Street, #18-08, Tong Eng Building, Singapore 069533 | &nbsp;&nbsp;Indian |

---

## Ex-10

**Exhibit 10**

**SCHEDULE C**<br>

**ADDITIONAL INFORMATION CONCERNING LUMEN INVESTMENTS S.À R.L**

---

| | | | | |
|:---|:---|:---|:---|:---|
| &nbsp;&nbsp;**Name** | &nbsp;&nbsp;**Business Address** | &nbsp;&nbsp;**Present Principal Occupation or Employment** | &nbsp;&nbsp;**Name, Principal Business and Address of Principal Employment** | &nbsp;&nbsp;**Citizenship** |
| &nbsp;&nbsp;Georgiana-Mihaela Galca | &nbsp;&nbsp;28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;Senior Manager of Client Accounting | &nbsp;&nbsp; CSC Global Solutions (Luxembourg) S.a r.l.,<br> 28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;Romania |
| &nbsp;&nbsp;Maria Papastefanou | &nbsp;&nbsp;28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;Manager Accounting Services | &nbsp;&nbsp; CSC Global Solutions (Luxembourg) S.a r.l.,<br> 28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;Cyprus |
| &nbsp;&nbsp;Vanisha Mittal Bhatia | &nbsp;&nbsp; Berkeley Square House, Berkeley Square<br> London<br> W1J 6DA<br> United Kingdom | &nbsp;&nbsp;Director | &nbsp;&nbsp;ArcelorMittal, 24-26, Boulevard d'Avranches, L-1160 Luxembourg | &nbsp;&nbsp;India |
| &nbsp;&nbsp;Aditya Mittal | &nbsp;&nbsp; Berkeley Square House, Berkeley Square<br> London<br> W1J 6DA<br> United Kingdom | &nbsp;&nbsp;Chief Executive Officer | &nbsp;&nbsp;ArcelorMittal, 24-26, Boulevard d'Avranches, L-1160 Luxembourg | &nbsp;&nbsp;India |
| &nbsp;&nbsp;Aurélie Fanny Rubler | &nbsp;&nbsp;28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;Manager of Client Legal | &nbsp;&nbsp; CSC Global Solutions (Luxembourg) S.a r.l.,<br> 28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;France |
| &nbsp;&nbsp;Emilija Vabuolaite Velickiene | &nbsp;&nbsp;28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;Senior Manager Legal & Corporate | &nbsp;&nbsp; CSC Global Solutions (Luxembourg) S.a r.l.,<br> 28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;Lithuania |
| &nbsp;&nbsp;Georges Scheuer | &nbsp;&nbsp;28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;General Manager | &nbsp;&nbsp; CSC Global Solutions (Luxembourg) S.a r.l.,<br> 28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp; Luxembourg<br>|

---

## Ex-11

**Exhibit 11**

**SCHEDULE D**

**ADDITIONAL INFORMATION CONCERNING NUAVAM INVESTMENTS S.À R.L**

---

| | | | | |
|:---|:---|:---|:---|:---|
| &nbsp;&nbsp;**Name** | &nbsp;&nbsp;**Business Address** | &nbsp;&nbsp;**Present Principal Occupation or Employment** | &nbsp;&nbsp;**Name, Principal Business and Address of Principal Employment** | &nbsp;&nbsp;**Citizenship** |
| &nbsp;&nbsp;Georgiana-Mihaela Galca | &nbsp;&nbsp;28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;Senior Manager of Client Accounting | &nbsp;&nbsp; CSC Global Solutions (Luxembourg) S.a r.l.,<br> 28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;Romania |
| &nbsp;&nbsp;Maria Papastefanou | &nbsp;&nbsp;28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;Manager Accounting Services | &nbsp;&nbsp; CSC Global Solutions (Luxembourg) S.a r.l.,<br> 28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;Cyprus |
| &nbsp;&nbsp;Vanisha Mittal Bhatia | &nbsp;&nbsp; Berkeley Square House, Berkeley Square<br> London<br> W1J 6DA<br> United Kingdom | &nbsp;&nbsp;Director | &nbsp;&nbsp;ArcelorMittal, 24-26, Boulevard d'Avranches, L-1160 Luxembourg | &nbsp;&nbsp;India |
| &nbsp;&nbsp;Aditya Mittal | &nbsp;&nbsp; Berkeley Square House, Berkeley Square<br> London<br> W1J 6DA<br> United Kingdom | &nbsp;&nbsp;Chief Executive Officer | &nbsp;&nbsp;ArcelorMittal, 24-26, Boulevard d'Avranches, L-1160 Luxembourg | &nbsp;&nbsp;India |
| &nbsp;&nbsp;Aurélie Fanny Rubler | &nbsp;&nbsp;28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;Manager of Client Legal | &nbsp;&nbsp; CSC Global Solutions (Luxembourg) S.a r.l.,<br> 28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;France |
| &nbsp;&nbsp;Emilija Vabuolaite Velickiene | &nbsp;&nbsp;28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;Senior Manager Legal & Corporate | &nbsp;&nbsp; CSC Global Solutions (Luxembourg) S.a r.l.,<br> 28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;Lithuania |
| &nbsp;&nbsp;Georges Scheuer | &nbsp;&nbsp;28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;General Manager | &nbsp;&nbsp; CSC Global Solutions (Luxembourg) S.a r.l.,<br> 28, Boulevard F.W. Raiffeisen, L-2411 Luxembourg | &nbsp;&nbsp;Luxembourg |

---

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 19)**

**ArcelorMittal**

*(Name of Issuer)*

**Ordinary Shares**

*(Title of Class of Securities)*

**—**

*(CUSIP Number)*

**Mohamed Taha**<br>Cleary Gottlieb Steen & Hamilton LLP<br>Abu Dhabi C0 POB 29920<br>971-2-412-1741

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**03/05/2026**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**LUMEN INVESTMENTS S.A R.L.** | Name of reporting person<br>**LUMEN INVESTMENTS S.A R.L.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**N4** | Citizenship or place of organization<br>**N4** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**275840595.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**275840595.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**275840595.00** | Aggregate amount beneficially owned by each reporting person<br>**275840595.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**36.2%** | Percent of class represented by amount in Row (11)<br>**36.2%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**HC** | Type of Reporting Person (See Instructions)<br>**HC** | |

---

**Comment for Reporting Person:** The percent of class figures set forth in this Nineteenth Amendment (as defined below) are calculated based on 761,252,362 issued and outstanding ArcelorMittal Shares (as defined below) as of February 28, 2026 as published on the website of ArcelorMittal.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Lakshmi N. Mittal** | Name of reporting person<br>**Lakshmi N. Mittal** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**K7** | Citizenship or place of organization<br>**K7** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**653620.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**339498943.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**653620.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**339498943.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**340152563.00** | Aggregate amount beneficially owned by each reporting person<br>**340152563.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | |
| 13 | Percent of class represented by amount in Row (11)<br>**44.7%** | Percent of class represented by amount in Row (11)<br>**44.7%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** The percent of class figures set forth in this Nineteenth Amendment (as defined below) are calculated based on 761,252,362 issued and outstanding ArcelorMittal Shares (as defined below) as of February 28, 2026 as published on the website of ArcelorMittal.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Usha Mittal** | Name of reporting person<br>**Usha Mittal** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**K7** | Citizenship or place of organization<br>**K7** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**25500.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**339498943.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**25500.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**339498943.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**339524443.00** | Aggregate amount beneficially owned by each reporting person<br>**339524443.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**44.6%** | Percent of class represented by amount in Row (11)<br>**44.6%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** The percent of class figures set forth in this Nineteenth Amendment (as defined below) are calculated based on 761,252,362 issued and outstanding ArcelorMittal Shares (as defined below) as of February 28, 2026 as published on the website of ArcelorMittal.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Grandel Pte. Ltd.** | Name of reporting person<br>**Grandel Pte. Ltd.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**U0** | Citizenship or place of organization<br>**U0** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**339498943.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**339498943.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**339498943.00** | Aggregate amount beneficially owned by each reporting person<br>**339498943.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**44.6%** | Percent of class represented by amount in Row (11)<br>**44.6%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**HC** | Type of Reporting Person (See Instructions)<br>**HC** | |

---

**Comment for Reporting Person:** The percent of class figures set forth in this Nineteenth Amendment (as defined below) are calculated based on 761,252,362 issued and outstanding ArcelorMittal Shares (as defined below) as of February 28, 2026 as published on the website of ArcelorMittal.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Nuavam Investments S.a r.l.** | Name of reporting person<br>**Nuavam Investments S.a r.l.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**N4** | Citizenship or place of organization<br>**N4** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**63658348.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**63658348.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**63658348.00** | Aggregate amount beneficially owned by each reporting person<br>**63658348.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**8.4%** | Percent of class represented by amount in Row (11)<br>**8.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**HC** | Type of Reporting Person (See Instructions)<br>**HC** | |

---

**Comment for Reporting Person:** The percent of class figures set forth in this Nineteenth Amendment (as defined below) are calculated based on 761,252,362 issued and outstanding ArcelorMittal Shares (as defined below) as of February 28, 2026 as published on the website of ArcelorMittal.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**HSBC Trustee (C.I.) Limited, as trustee of the Platinum Trust** | Name of reporting person<br>**HSBC Trustee (C.I.) Limited, as trustee of the Platinum Trust** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**Y9** | Citizenship or place of organization<br>**Y9** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**339498943.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**339498943.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**339498943.00** | Aggregate amount beneficially owned by each reporting person<br>**339498943.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**44.6%** | Percent of class represented by amount in Row (11)<br>**44.6%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

**Comment for Reporting Person:** The percent of class figures set forth in this Nineteenth Amendment (as defined below) are calculated based on 761,252,362 issued and outstanding ArcelorMittal Shares (as defined below) as of February 28, 2026 as published on the website of ArcelorMittal.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Ordinary Shares

**(b) Name of Issuer:**
ArcelorMittal

**(c) Address of Issuer's Principal Executive Offices:**
24-26, Boulevard d'Avranches, L-1160 LUXEMBOURG, GRAND DUCHY OF LUXEMBOURG, N4, 00000

This Amendment No. 19 (this "Nineteenth Amendment") to Schedule 13D amends and supplements Amendment No. 18 to Schedule 13D, filed March 3, 2022 (the "Eighteenth Amendment"), Amendment No. 17 to Schedule 13D, filed February 23, 2022, Amendment No.16 to Schedule 13D, filed November 19, 2021, Amendment No. 15 to Schedule 13D, filed August 2, 2021, Amendment No.14 to Schedule 13D, filed June 22, 2021, Amendment No.13 to Schedule 13D, filed February 16, 2021, Amendment No. 12 to Schedule 13D, filed May 29, 2020, Amendment No. 11 to Schedule 13D, filed May 13, 2020, Amendment No. 10 to Schedule 13D, filed April 12, 2016, Amendment No. 9 to Schedule 13D, filed March 15, 2016, Amendment No. 8 to Schedule 13D, filed February 5, 2016, Amendment No. 7 to Schedule 13D, filed January 11, 2013, Amendment No. 6 to Schedule 13D, filed June 23, 2010, Amendment No. 5 to Schedule 13D, filed April 12, 2010, Amendment No. 4 to Schedule 13D, filed May 8, 2009, Amendment No. 3 to Schedule 13D, filed April 3, 2009, Amendment No. 2 to Schedule 13D, filed November 20, 2007, Amendment No. 1 to Schedule 13D, filed August 30, 2006, as well as the statement on Schedule 13D originally filed on December 27, 2004 (as amended, the "Statement") with the Securities and Exchange Commission (the "Commission") relating to the Ordinary Shares, without nominal value, of ArcelorMittal ("ArcelorMittal Shares"), a company organized under the laws of The Grand Duchy of Luxembourg ("ArcelorMittal" or the "Company") and the successor entity by merger to Mittal Steel Company N.V., a company organized under the laws of the Netherlands ("Mittal Steel"). Unless otherwise indicated, capitalized terms used but not defined in this Nineteenth Amendment have the meanings ascribed to such terms in the Statement.

**Item 4. Purpose of Transaction**

The first two disclosure paragraphs of the response set forth in Item 4 of the Statement are hereby amended by deleting the paragraphs in their entirety and replacing them with the following:

On April 7, 2025, ArcelorMittal announced a new share buy-back program with share repurchases to be conducted in tranches that may be announced through May 2030 (the "Buy-Back Program"). On such date, ArcelorMittal also announced its intention to repurchase up to 10,000,000 shares under the first tranche of the program. The actual amount of the ArcelorMittal Shares to be repurchased in the various tranches pursuant to the Buy-Back Program will depend on the level of post-dividend free cash flow generated over the period. To date, none of the Reporting Persons have sold any ArcelorMittal Shares in the Buy-Back Program.

On March 5, 2026, ArcelorMittal and Lumen entered into a Share Repurchase Agreement (as defined below) in connection with the Buy-Back Program. On each trading day during which ArcelorMittal conducts purchases under the Buy-Back Program, ArcelorMittal and Lumen have agreed to purchase and sell, respectively, a number of ArcelorMittal Shares, such that the number of ArcelorMittal Shares so purchased and sold represents 44.6% of the sum of: (i) the total number of shares purchased by ArcelorMittal under the Buy-Back Program (other than from Lumen) and (ii) the number of ArcelorMittal Shares purchased by ArcelorMittal from Lumen pursuant to the Share Repurchase Agreement, in each case on that trading day.

The foregoing summary of Lumen's undertaking to participate in the Buy-Back Program should be read in conjunction with the full text of the Share Repurchase Agreement (as defined below), a copy of which is included as Exhibit 7 to this Nineteenth Amendment and which is incorporated herein by reference. The description of the Share Repurchase Agreement as set forth in Item 6 of this Nineteenth Amendment is incorporated by reference herein.

**Item 5. Interest in Securities of the Issuer**

**(a)**
The response set forth in Item 5(a) of the Statement is hereby amended by deleting the previous response in its entirety and replacing it with the following.

Lumen is the direct owner of 275,840,595 ArcelorMittal Shares, representing 36.2% of the ArcelorMittal Shares outstanding.

Nuavam is the direct owner of 63,658,348 ArcelorMittal Shares, representing 8.4% of the ArcelorMittal Shares outstanding.

Grandel Singapore is the indirect owner of 339,498,943 ArcelorMittal Shares, representing 44.6% of the ArcelorMittal Shares, by virtue of its 100% indirect ownership of Lumen and Nuavam.

The Trustee is the indirect beneficial owner of 339,498,943 ArcelorMittal Shares, representing 44.6% of the ArcelorMittal Shares, by virtue of its beneficial ownership of 70% of the Class A voting shares of Grandel Singapore, as discussed in greater detail in Item 2 of the Statement.

Mr. Mittal is the direct owner of 653,620 ArcelorMittal Shares representing less than 0.1% of the ArcelorMittal Shares outstanding. Furthermore, as a result of the arrangements set out in the Platinum Trust Deed, Mr. Mittal shares with Mrs. Mittal and the Trustee beneficial ownership (as such term is defined under Rule 13d-3 under the Act) of 70% of the Class A voting shares of Grandel Singapore and accordingly Mr. Mittal is the beneficial owner of 340,152,563 ArcelorMittal Shares in total, representing 44.7% of the ArcelorMittal Shares outstanding. In addition, Mr. Mittal holds a total of  257,676 performance share units, granted by ArcelorMittal pursuant to its Group Management Board Performance Share Unit Plan ("PSU"), of which 67,857 may vest in January 2027, 112,635 may vest in January 2028 and 77,184 may vest in January 2029.  As the vesting of PSUs is dependent on company performance criteria not fully within the control of the PSU holder, Mr. Mittal does not beneficially own ArcelorMittal Shares by virtue of his ownership of the PSUs.

Mrs. Mittal is the direct owner of 25,500 ArcelorMittal Shares, representing less than 0.1% of the ArcelorMittal Shares outstanding. Additionally, as a result of the arrangements set out in the Platinum Trust Deed, Mrs. Mittal shares with Mr. Mittal and the Trustee beneficial ownership (as such term is defined under Rule 13d-3 under the Act) of 70% of the Class A voting shares of Grandel Singapore and accordingly Mrs. Mittal is the beneficial owner of 339,524,443 ArcelorMittal Shares in total, representing 44.6% of the ArcelorMittal Shares outstanding.

Aditya Mittal is the direct owner of 467,646 ArcelorMittal Shares, representing less than 0.1% of the ArcelorMittal Shares outstanding. Aditya Mittal holds a total of 286,080 PSUs of which 74,116 may vest in January 2027, 129,221 may vest in January 2028 and 82,743 may vest in January 2029. As the vesting of PSUs is dependent on company performance criteria not fully within the control of the PSU holder, Aditya Mittal does not beneficially own ArcelorMittal Shares by virtue of his ownership of the PSUs. Aditya Mittal is the son of Mr. Mittal and Mrs. Mittal.

Vanisha Mittal Bhatia is the direct owner of 8,500 ArcelorMittal Shares, representing less than 0.1% of the ArcelorMittal Shares outstanding. Vanisha Mittal Bhatia is the daughter of Mr. Mittal and Mrs. Mittal.

The calculation of the beneficial ownership percentages set forth in Item 5(a) and 5(b) is based on 775,000,000 ArcelorMittal Shares issued as of February 28, 2026 as published on the website of ArcelorMittal, of which 13,747,638 were held by ArcelorMittal as treasury stock, resulting in a balance of 761,252,362 ArcelorMittal Shares outstanding as of February 28, 2026.

**(b)**
The response set forth in Item 5(b) of the Statement is hereby amended by deleting the previous response in its entirety and replacing it with the following.

Lumen has the power to vote or to direct the vote or dispose or direct the disposition of 275,840,595 ArcelorMittal Shares. Lumen shares such powers with Mr. Mittal, Mrs. Mittal, the Trustee and Grandel Singapore, by virtue of their indirect beneficial ownership (as such term is defined under Rule 13d-3 under the Act) of Lumen. Accordingly, Lumen shares with the persons specified in the immediately preceding sentence the power to vote or to direct the vote or dispose or direct the disposition of 275,840,595 ArcelorMittal Shares, representing 36.2% of the ArcelorMittal Shares outstanding.

Nuavam has the power to vote or to direct the vote or dispose or direct the disposition of 63,658,348 ArcelorMittal Shares. Nuavam shares such powers with Mr. Mittal, Mrs. Mittal, the Trustee and Grandel Singapore, by virtue of their indirect beneficial ownership (as such term is defined under Rule 13d-3 under the Act) of Nuavam. Accordingly, Nuavam shares with the persons specified in the immediately preceding sentence the power to vote or to direct the vote or dispose or direct the disposition of 63,658,348 ArcelorMittal Shares, representing 8.4% of the ArcelorMittal Shares outstanding.

Grandel Singapore has the power to vote or to direct the vote or dispose or direct the disposition of 339,498,943 ArcelorMittal Shares, which it shares with Mr. Mittal, Mrs. Mittal and the Trustee, by virtue of the Trustee's beneficial ownership (as such term is defined under Rule 13d-3 under the Act) of 70% of the Grandel Singapore voting shares and the terms of the Platinum Trust Deed, as well as with Lumen and Nuavam as described in the preceding two paragraphs. Accordingly, Grandel Singapore shares with the persons specified in the immediately preceding sentence the power to vote or to direct the vote or dispose or direct the disposition of 339,498,943 ArcelorMittal Shares, representing 44.6% of the ArcelorMittal Shares outstanding.

The Trustee (subject to its obligations under the Platinum Trust Deed, articles of association of Grandel Singapore and its obligations as a fiduciary under applicable law) has the power to vote or to direct the vote or dispose or direct the disposition of 339,498,943 ArcelorMittal Shares, which it shares with Mr. Mittal and Mrs. Mittal by virtue of their shared beneficial ownership (as such term is defined under Rule 13d-3 under the Act) of 70% of the Class A voting shares in Grandel Singapore, as well as with Lumen, Nuavam and Grandel Singapore as described in the preceding three paragraphs. Accordingly, the Trustee shares with the persons specified in the immediately preceding sentence the power to vote or to direct the vote or dispose or direct the disposition of 339,498,943 ArcelorMittal Shares, representing 44.6% of the ArcelorMittal Shares outstanding.

Mr. Mittal has the sole power to vote or to direct the vote or dispose or direct the disposition of the 653,620 ArcelorMittal Shares that he owns directly, representing less than 0.1% of the ArcelorMittal Shares outstanding. Mr. Mittal, Mrs. Mittal and the Trustee also share beneficial ownership of 70% of the Class A voting shares of Grandel Singapore, thereby sharing power to vote or to direct the vote or dispose or direct the disposition of ArcelorMittal Shares as described in the third paragraph of Item 5(b). Accordingly, Mr. Mittal shares the power to vote or to direct the vote or dispose or direct the disposition of 340,152,563 ArcelorMittal Shares beneficially owned by him, representing 44.7% of the ArcelorMittal Shares outstanding. See Item 6 below regarding Mr. Mittal's and Mrs. Mittal's shared beneficial ownership of 70% of the Class A voting shares of Grandel Singapore with the Trustee.

Mrs. Mittal has the sole power to vote or to direct the vote or dispose or direct the disposition of the 25,500 ArcelorMittal Shares that she owns directly, representing less than 0.1% of the ArcelorMittal Shares outstanding. Mrs. Mittal, Mr. Mittal and the Trustee also share beneficial ownership of 70% of the Class A voting shares of Grandel Singapore, thereby sharing power to vote or to direct the vote or dispose or direct the disposition of ArcelorMittal Shares as described in the third paragraph of Item 5(b). Accordingly, Mrs. Mittal shares the power to vote or to direct the vote or dispose or direct the disposition of 339,524,443 ArcelorMittal Shares beneficially owned by her, representing 44.6% of the ArcelorMittal Shares outstanding.

Aditya Mittal has the sole power to vote or to direct the vote or dispose or direct the disposition of the 467,646 ArcelorMittal Shares that he owns directly, representing less than 0.1% of the ArcelorMittal Shares outstanding.

Vanisha Mittal Bhatia has the sole power to vote or to direct the vote or dispose or direct the disposition of the 8,500 ArcelorMittal Shares that she owns directly, representing less than 0.1% of the ArcelorMittal Shares outstanding.

**(c)**
The response set forth in Item 5(c) of the Statement is hereby amended by deleting the previous response in its entirety and replacing it with the following.

To the knowledge of the Reporting Persons, none of the persons named in Item 2 has effected any transaction in the ArcelorMittal Shares during the past 60 days.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

The response set forth in Item 6 of the Statement is hereby amended by deleting the previous disclosure set forth under the heading "Share Repurchase Agreement and Amendments Thereto" in the entirety and replacing it with the following:

Share Repurchase Agreement

On March 5, 2026, ArcelorMittal and Lumen entered into a share repurchase agreement (the "Share Repurchase Agreement") in connection with the Buy-Back Program. On each trading day during which ArcelorMittal conducts purchases under the Buy-Back Program, ArcelorMittal and Lumen have agreed to buy and sell, respectively, a number of ArcelorMittal Shares, such that the number of ArcelorMittal Shares so purchased and sold represents 44.6% of the sum of: (i) the total number of shares purchased by ArcelorMittal under the Buy-Back Program (other than from Lumen) and (ii) the number of ArcelorMittal Shares purchased by ArcelorMittal from Lumen pursuant to the Share Repurchase Agreement, in each case on that trading day. The Share Repurchase Agreement provides that the ArcelorMittal Shares to be repurchased from Lumen in connection with the Buy-Back Program during any trading day will be repurchased at the same weighted average price as the ArcelorMittal Shares purchased under the Buy-Back Program on the relevant trading day in the open market. Purchases and sales occurring during periods of five consecutive trading days will be settled together two trading days following the end of each such period. However, any settlement of ArcelorMittal Shares in connection with the Buy-Back Program will be postponed if such settlement would cause the Trustee to hold less than one-third of all the voting rights of ArcelorMittal (including those connected with the ArcelorMittal Shares held in treasury by or on behalf of ArcelorMittal or the subsidiaries of ArcelorMittal). Lumen may terminate the Share Repurchase Agreement at any time following completion of the first tranche of the Buy-Back Program upon at least five business days' prior written notice to ArcelorMittal, provided that such termination will not become effective on a trading day on which repurchases are being effected and will not affect settlement of repurchases initiated prior to such termination.

The foregoing summary of the Share Repurchase Agreement is qualified by reference to the full text of the Share Repurchase Agreement, a copy of which is included as Exhibit 7 to this Nineteenth Amendment and which is incorporated herein by reference.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** LUMEN INVESTMENTS S.A R.L.

**Signature:** /s/ Aurelie Fanny Rubler

**Name/Title:** Aurelie Fanny Rubler / Class A Manager

**Date:** 03/19/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Lakshmi N. Mittal

**Signature:** /s/ Lakshmi N. Mittal

**Name/Title:** Lakshmi N. Mittal

**Date:** 03/19/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Usha Mittal

**Signature:** /s/ Usha Mittal

**Name/Title:** Usha Mittal

**Date:** 03/19/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Grandel Pte. Ltd.

**Signature:** /s/ Sanjay Shukla

**Name/Title:** Sanjay Shukla / Director

**Date:** 03/19/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Nuavam Investments S.a r.l.

**Signature:** /s/ Aurelie Fanny Rubler

**Name/Title:** Aurelie Fanny Rubler / Class A Manager

**Date:** 03/19/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** HSBC Trustee (C.I.) Limited, as trustee of the Platinum Trust

**Signature:** /s/ Elaine Connor

**Name/Title:** Elaine Connor / Authorised Signatory

**Date:** 03/19/2026