Company: TNRSF
Filing Date: 2025-10-30
Form Type: 6-K
Source: 0001171843-25-006840
Chunk: 3

Company: TENARIS SA
Filing Date: 2025-10-30
Form: 6-K
Chunk 3
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 |   20.6% |     |   19.0% |     |      |     |   18.9% |     |      |

Net sales of tubular products and services decreased 2% sequentially and increased 3% year on year. Overall volumes decreased slightly with a 3% decline in seamless volumes being offset by an 11% increase in welded volumes. Average selling prices decreased 1% mainly due to a less favorable product mix. In North America sales were stable in the United States and Canada while in Mexico sales increased supported by sales for the Trion deepwater project. In South America we had lower sales in Brazil and of coating services in Guyana largely compensated by deliveries for the Vaca Muerta Sur pipeline in Argentina. In Europe sales declined due to lower sales to the North Sea and marginally lower level of shipments of mechanical pipes to distributors. In Asia Pacific, Middle East and Africa sales declined due to lower shipments for offshore line pipe projects and for a gas processing plant in Algeria.

Operating results from tubular products and servicesamounted to a gain of $592 million in the third quarter of 2025 compared to a gain of $554 million in the previous quarter and a gain of $527 million in the third quarter of 2024. In the third quarter of 2025 Tubes operating income includes a $34 million gain recorded in cost of sales, reflecting the return of U.S. antidumping deposits paid on OCTG imports from Argentina for which the duty rate had been revised downwards.

Others

The following table indicates, for our Others business segment, net sales, operating income and operating income as a percentage of net sales for the periods indicated below:

| Others                        |     | 3Q 2025 |     | 2Q 2025 |     |      |     | 3Q 2024 |     |      |
| Net sales ($ million)         |     |     103 |     |     166 |     | -38% |     |     125 |     | -17% |
| Operating income ($ million)  |     |       5 |     |      29 |     | -84% |     |      10 |     | -53% |
| Operating margin (% of sales) |     |    4.5% |     |   17.3% |     |      |     |    7.9% |     |      |

Net sales of other products and services decreased