Company: MT
Filing Date: 2025-08-01
Form Type: 6-K
Source: 0001243429-25-000067
Chunk: 80

Company: ArcelorMittal
Filing Date: 2025-08-01
Form: 6-K
Chunk 80
---
 party claims to have exercised an effective put- option, which the other party disputes. Tauron seeks the payment of 165(PLN 598million) for its 50% shareholding in Tameh. In the response, the Company filed a counterclaim against Tauron for the same amount. Tribunal selection has been finalized and the first procedural hearing was held in June 2025. The Tribunal has also approved Tauron’s request to join ArcelorMittal Investment Management Poland as an additional respondent given it was a shareholder in Tameh. Canada

In April 2025, two hundredcharges of environmental violations were brought by the Federal Authorities against ArcelorMittal Canada Inc. under the Fisheries Act. These violations were allegedly committed between 2014 and 2022. ArcelorMittal Canada Inc. is defending the actions and the first procedural hearing took place in July 2025. A further case management conference will take place in September 2025.

<div align='center'>Exhibit Index</div>

| Exhibit Number |     | Description                                                                                                                                                    |
| 101.INS        |     | XBRL Instance Document- the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document. |
| 101.SCH        |     | Inline XBRL Taxonomy Extension Schema Document                                                                                                                 |
| 101.CAL        |     | Inline XBRL Taxonomy Extension Calculation Linkbase Document                                                                                                   |
| 101.DEF        |     | Inline XBRL Taxonomy Extension Definition Linkbase Document                                                                                                    |
| 101.LAB        |     | Inline XBRL Taxonomy Extension Label Linkbase Document                                                                                                         |
| 101.PRE        |     | Inline XBRL Taxonomy Extension Presentation Linkbase Document                                                                                                  |

### SIGNATURES
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.

<div align='center'>ARCELORMITTAL</div>

Date: August 1, 2025

By: /s/ Henk Scheffer

Name: Henk Scheffer

Title: Company Secretary