Company: TNRSF
Filing Date: 2025-02-21
Form Type: 6-K
Source: 0001171843-25-000987
Chunk: 106

Company: TENARIS SA
Filing Date: 2025-02-21
Form: 6-K
Chunk 106
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 |     |                    100% |     | 100% |     | 100% |
| TENARIS GLOBAL SERVICES (UK) LTD                                     |     | United Kingdom |     | Holding company and marketing of steel products                                        |     |                    100% |     | 100% |     | 100% |
| TENARIS GLOBAL SERVICES S.A. and subsidiaries                        |     | Uruguay        |     | Marketing, distribution of steel products and holding company                          |     |                    100% |     | 100% |     | 100% |
| TENARIS INVESTMENTS (NL) B.V. and subsidiaries                       |     | Netherlands    |     | Holding company                                                                        |     |                    100% |     | 100% |     | 100% |
| TENARIS GLOBAL SERVICES and INVESTMENTS S.àr.l. and subsidiaries     |     | Luxembourg     |     | Marketing and distribution of steel products, financial operations and holding company |     |                    100% |     | 100% |     | 100% |
| TENARIS QINGDAO STEEL PIPES LTD.                                     |     | China          |     | Processing of premium joints, couplings and automotive components                      |     |                    100% |     | 100% |     | 100% |
| TENARIS TUBOCARIBE LTDA.                                             |     | Colombia       |     | Manufacturing of welded and seamless steel pipes                                       |     |                    100% |     | 100% |     | 100% |
| TUBOS DE ACERO DE MEXICO, S.A. and subsidiaries                      |     | Mexico         |     | Manufacturing of seamless steel pipes                                                  |     |                    100% |     | 100% |     | 100% |

(*)All percentages rounded.

Tenaris holds 40% of Tubular Technical Services Ltd. and Pipe Coaters Nigeria Ltd., 49% of Tubulars Finishing Nigeria Limited, 49% of Amaja Tubular Services Limited, 60% of Tenaris Baogang Baotou Steel Pipes Ltd. Until 2022 held 98.4% of Tenaris Supply Chain S.A.

(a) Dalmine S.p.A holds 57% of Immobiliare Cultura Industriale S.R.L.

(b) Tenaris holds 50% of the voting rights and Ternium owns the remaining 50%. Exiros provides purchase agency services