ArcelorMittal: BlackRock reaches 5% potential voting rights
Lumen Investments S.à r.l.’s share-transaction notification was available through the Luxembourg Stock Exchange’s OAM database and ArcelorMittal’s website.
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Form Type
6-K
Rhea-AI Filing Summary
ArcelorMittal (MT) announced that BlackRock, Inc. reached the 5% threshold for potential voting rights on October 15, 2026; ArcelorMittal said it received the notification on October 19, 2026. Separately, ArcelorMittal announced that a share-transaction notification by Lumen Investments S.à r.l., an entity forming part of the Significant Shareholder structure, was available through public channels.
Key Figures
Potential voting rights threshold: 5%
Revenue: $61.4 billion
Crude steel production: 55.6 million metric tonnes
+3 more
6 metrics
Potential voting rights threshold
5%
Reached on October 15, 2026, according to the notification
Revenue
$61.4 billion
2025
Crude steel production
55.6 million metric tonnes
2025
Iron ore production
48.8 million tonnes
2025
Countries with a presence
60 countries
Company profile
Countries with primary steelmaking operations
14 countries
Company profile
Key Terms
potential voting rights, Transparency Law, Market Abuse Regulation
3 terms
potential voting rights regulatory
"threshold of (potential) voting rights was reached"
Transparency Law regulatory
"Luxembourg law and the Grand Ducal regulation"
Market Abuse Regulation regulatory
"Regulation (EU) No 596/2014"
Market abuse regulation consists of laws and rules designed to prevent dishonest or manipulative practices in financial markets. It aims to ensure fair and transparent trading, so investors can trust that markets operate honestly, much like rules that keep a game fair. By reducing unfair advantages, it helps protect investor confidence and promotes healthy, efficient markets.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What voting-rights threshold did BlackRock reach in ArcelorMittal (MT)?
BlackRock, Inc. reached the 5% threshold for potential voting rights on October 15, 2026. ArcelorMittal said it received the notification on October 19, 2026, and that it was available in the Luxembourg Stock Exchange’s OAM database and on the company’s website.
AI-generated analysis. How Rhea-AI works. Not financial advice.
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
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
PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934
—————————
Dated October 28, 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 executive office)
Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.
Form 20-F ☑ Form 40-F ☐
On October 26, 2026 and October 28, 2026, ArcelorMittal published the press releases attached hereto as Exhibits 99.1 and 99.2 and hereby incorporated by reference into this report on Form 6-K.
Exhibit Index
| Exhibit No. | Description | ||||
Exhibit 99.1 | Notifications of transaction in ArcelorMittal shares – BlackRock | ||||
Exhibit 99.2 | Notification of share transactions by Lumen Investments S.à r.l | ||||
SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
ARCELORMITTAL
Date 28 October 2026
By: /s/ Henk Scheffer
Name: Henk Scheffer
Title: Company Secretary & Group Compliance & Data Protection Officer
Exhibit 99.1
press release
Notifications of transaction in ArcelorMittal shares – BlackRock
Luxembourg, 26 October, 18:30 CET
ArcelorMittal (the ‘Company’) announces that on 19 October 2026 it received a shareholding notification from BlackRock, Inc. According to this notification, the following threshold of (potential) voting rights was reached.
5% on 15 October 2026.
This notification is available in the Luxembourg Stock Exchange’s OAM electronic database on http://www.bourse.lu/ and on the Company’s website corporate.arcelormittal.com under ‘Investors - Corporate Governance - Shareholding structure’.
This notification is published in reference to the Luxembourg law and the Grand Ducal regulation of 11 January 2008, on transparency requirements for issuers of securities (‘Transparency Law’) in view of a shareholding notification going above or below the 5% of voting rights threshold.
ENDS
About ArcelorMittal
ArcelorMittal is one of the world’s leading integrated steel and mining companies with a presence in 60 countries and primary steelmaking operations in 14 countries. It is the largest steel producer in Europe, among the largest in the Americas, and has a growing presence in Asia through its joint venture AM/NS India. ArcelorMittal sells its products to a diverse range of customers including the automotive, engineering, construction and machinery industries, and in 2025 generated revenues of $61.4 billion, produced 55.6 million metric tonnes of crude steel and 48.8 million tonnes of iron ore. Our purpose is to produce smarter steels for people and planet. Steels made using innovative processes which use less energy, emit significantly less carbon and reduce costs. Steels that are cleaner, stronger and reusable. Steels for the renewable energy infrastructure that will support societies as they transform through this century. With steel at our core, our inventive people and an entrepreneurial culture at heart, we will support the world in making that change.
ArcelorMittal is listed on the stock exchanges of New York (MT), Amsterdam (MT), Paris (MT), Luxembourg (MT) and on the Spanish stock exchanges of Barcelona, Bilbao, Madrid and Valencia (MTS).
http://corporate.arcelormittal.com/
Page 1 of 2
ArcelorMittal Investor Relations contact information | |||||
General | +44 20 7543 1128 | ||||
Retail | +44 20 3214 2893 | ||||
Bonds/Credit | +33 157 955 035 | ||||
ArcelorMittal Corporate Communications contact information | |||||
Paul Weigh | |||||
Tel: | +44 20 3214 2419 | ||||
E-mail | press@arcelormittal.com | ||||
Page 2 of 2
Exhibit 99.2
press release
Notification of share transactions by Lumen Investments S.à r.l
Luxembourg, 28 October 2026, 11:30 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 Regulation), ArcelorMittal announces that a notification of share transactions by Lumen Investments S.à r.l., an entity forming part of the Significant Shareholder structure, is available in the Luxembourg Stock Exchange's electronic database OAM on www.bourse.lu and on ArcelorMittal's website www.arcelormittal.com under Investors > Share Transactions by Management: https://corporate.arcelormittal.com/investors/corporate-governance/share-transactions-by-management.
ENDS
About ArcelorMittal
ArcelorMittal is one of the world’s leading integrated steel and mining companies with a presence in 60 countries and primary steelmaking operations in 14 countries. It is the largest steel producer in Europe, among the largest in the Americas, and has a growing presence in Asia through its joint venture AM/NS India. ArcelorMittal sells its products to a diverse range of customers including the automotive, engineering, construction and machinery industries, and in 2025 generated revenues of $61.4 billion, produced 55.6 million metric tonnes of crude steel and 48.8 million tonnes of iron ore. Our purpose is to produce smarter steels for people and planet. Steels made using innovative processes which use less energy, emit significantly less carbon and reduce costs. Steels that are cleaner, stronger and reusable. Steels for the renewable energy infrastructure that will support societies as they transform through this century. With steel at our core, our inventive people and an entrepreneurial culture at heart, we will support the world in making that change.
ArcelorMittal is listed on the stock exchanges of New York (MT), Amsterdam (MT), Paris (MT), Luxembourg (MT) and on the Spanish stock exchanges of Barcelona, Bilbao, Madrid and Valencia (MTS).
http://corporate.arcelormittal.com/
ArcelorMittal Investor Relations contact information | |||||
General | +44 20 7543 1128 | ||||
Retail | +44 20 3214 2893 | ||||
Bonds/Credit | +33 157 955 035 | ||||
Page 1 of 2
ArcelorMittal Corporate Communications contact information | |||||
Paul Weigh | |||||
Tel: | +44 20 3214 2419 | ||||
E-mail | press@arcelormittal.com | ||||
Page 2 of 2