Company: TNRSF
Filing Date: 2025-10-30
Form Type: 6-K
Source: 0001171843-25-006840
Chunk: 1

Company: TENARIS SA
Filing Date: 2025-10-30
Form: 6-K
Chunk 1
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2024.

Summary of 2025 Third Quarter Results

(Comparison with second quarter of 2025 and third quarter of 2024)

|                                      |     | 3Q 2025 |     | 2Q 2025 |     |      |     | 3Q 2024 |     |     |
| Net sales ($ million)                |     |   2,978 |     |   3,086 |     | -3%  |     |   2,915 |     | 2%  |
| Operating income ($ million)         |     |     597 |     |     583 |     | 2%   |     |     537 |     | 11% |
| Net income ($ million)               |     |     453 |     |     542 |     | -16% |     |     459 |     | -1% |
| Shareholders’ net income ($ million) |     |     446 |     |     531 |     | -16% |     |     448 |     | -1% |
| Earnings per ADS ($)                 |     |    0.85 |     |    0.99 |     | -14% |     |    0.81 |     | 5%  |
| Earnings per share ($)               |     |    0.43 |     |    0.50 |     | -14% |     |    0.40 |     | 5%  |
| EBITDA* ($ million)                  |     |     753 |     |     733 |     | 3%   |     |     688 |     | 9%  |
| EBITDA margin (% of net sales)       |     |   25.3% |     |   23.7% |     |      |     |   23.6% |     |     |

*EBITDA in the third quarter of 2025 includes a $34 million gain recorded for the return of U.S. antidumping deposits paid on OCTG imports from Argentina for which the duty rate had been revised downwards. If this gain was not included EBITDA would have amounted to $719 million, or 24.1% of sales. For more information, see note 18 “Contingencies, commitments and restrictions to the distribution of profits – U.S. Antidumping Duty Investigations”