Company: MT
Filing Date: 2025-08-01
Form Type: 6-K
Source: 0001243429-25-000067
Chunk: 0

Company: ArcelorMittal
Filing Date: 2025-08-01
Form: 6-K
Chunk 0
---
### 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
<div align='center'>(Translation of Registrant’s name into English)</div>

#### 24-26, boulevard d’Avranches,

#### L-1160 Luxembourg,

#### Grand Duchy of Luxembourg
<div align='center'>(Address of principal executive office)</div>

<div align='center'>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 ☐</div>

The following report on Form 6-K shall be deemed to be incorporated by reference in the registration statement on Form F-3 (No. 333-278551) of ArcelorMittal and the Prospectuses incorporated therein. This report on Form 6-K contains the Company's interim management report for the half-year ended June 30, 2025 (starting on page 3 ), including its interim condensed consolidated financial statements for the six months ended June 30, 2025 (starting on page 30 ).

| Interim Management Report                                                                            |     |    |
| Company overview                                                                                     |     |  3 |
| Corporate and other information                                                                      |     |  3 |
| Business overview                                                                                    |     |  3 |
| Key transactions and events                                                                          |     | 23 |
| Sustainable development highlights                                                                   |     | 25 |
| Corporate governance                                                                                 |     | 26 |
| Cautionary statement regarding forward-looking statements                                            |     | 29 |
| Interim condensed consolidated financial statements as of and for the six months ended June 30, 2025 |     | 30 |
| Condensed consolidated statements of operations                                                      |     | 31 |
| Condensed consolidated statements of other comprehensive income                                      |     | 32 |
| Condensed consolidated statements of financial position                                              |     | 33 |
| Condensed consolidated statements of changes in equity                                               |     | 34 |
| Condensed consolidated statements of cash flows                                                      |     | 35 |
|