On the Record · Tenaris
Tenaris subsidiaries, as it lists them
The subsidiaries Tenaris lists in its latest annual report, with the jurisdiction of each, linked to the filing.
Subsidiaries it lists
| Subsidiary | Jurisdiction |
|---|---|
| ALGOMA TUBES INC. | Canada |
| CONFAB INDUSTRIAL S.A. and subsidiaries | Brazil |
| DALMINE S.p.A. and subsidiaries (a) | Italy |
| EXIROS B.V. and subsidiaries (b) | Netherlands |
| HYDRIL COMPANY | USA |
| MAVERICK TUBE CORPORATION and subsidiaries | USA |
| OILFIELD SERVICES SOCIEDAD ANONIMA | Argentina |
| P.T. SEAMLESS PIPE INDONESIA JAYA | Indonesia |
| SILCOTUB S.A. | Romania |
| SAUDI STEEL PIPE CO. and subsidiaries (c) | Saudi Arabia |
| SIAT SOCIEDAD ANONIMA | Argentina |
| SIDERCA SOCIEDAD ANONIMA INDUSTRIAL Y COMERCIAL and subsidiaries (d) | Argentina |
| TALTA - TRADING E MARKETING SOCIEDADE UNIPESSOAL LDA. | Portugal |
| TENARIS BAY CITY, INC. | USA |
| TENARIS CONNECTIONS BV | Netherlands |
| TENARIS GLOBAL SERVICES (CANADA) INC. | Canada |
| TENARIS GLOBAL SERVICES (U.S.A.) CORPORATION | USA |
| TENARIS GLOBAL SERVICES (UK) LTD | United Kingdom |
| TENARIS GLOBAL SERVICES S.A. and subsidiaries | Uruguay |
| TENARIS INVESTMENTS (NL) B.V. and subsidiaries | Netherlands |
| TENARIS GLOBAL SERVICES and INVESTMENTS S.àr.l. and subsidiaries | Luxembourg |
| TENARIS QINGDAO STEEL PIPES LTD. | China |
| TENARIS TUBOCARIBE LTDA. | Colombia |
| TUBOS DE ACERO DE MEXICO, S.A. and subsidiaries | Mexico |
From the subsidiary exhibit of the 20-F for 2025. Companies must list their significant subsidiaries there and may leave out smaller ones, so this is the company’s own list, not every entity it owns.
Read from Tenaris’s annual reports (20-F for 2025, 20-F for 2024, 20-F for 2023) and the financial data it files with the SEC, as of 2026-03-31. Every quotation is word for word from the filing linked beside it; how these pages are built and checked. The full record is in its company data sheet.