Tenaris SA SEC filings TNRSF
Tenaris SA has 770 filings in SEC EDGAR's recent list, going back to Sep 18, 2002. Its latest annual report, Form 20-F, was filed on Mar 31, 2026 for the period ended Dec 31, 2025. The most recent current report (Form 6-K) was filed on Nov 5, 2026.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Feb 10, 2026 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Dec 17, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Sep 19, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Jul 8, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Feb 25, 2025 | — |
| SC 13D/A | Amended ownership over 5% (active) | Dec 9, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jul 30, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jun 4, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jan 22, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Nov 3, 2023 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jun 28, 2021 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jun 25, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 8, 2017 | — |
| SC 13D/A | Amended ownership over 5% (active) | Nov 14, 2016 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Apr 20, 2016 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Apr 18, 2016 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Mar 1, 2016 | — |
| SC 13D/A | Amended ownership over 5% (active) | Nov 19, 2015 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 6, 2015 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 24, 2014 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 25, 2013 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2012 | — |
| SC 13G | Ownership over 5% (passive) | Jan 11, 2012 | — |
| SC 13D | Ownership over 5% (active) | Feb 14, 2011 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2011 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2010 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2010 | — |
| SC 13G | Ownership over 5% (passive) | Feb 12, 2009 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2009 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 7, 2008 | — |
| SC 13D | Ownership over 5% (active) | Feb 21, 2007 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2007 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 6, 2006 | — |
| SC 13G | Ownership over 5% (passive) | Feb 3, 2004 | — |
| SC 13D/A | Amended ownership over 5% (active) | Sep 16, 2003 | — |
| SC 13D/A | Amended ownership over 5% (active) | Aug 12, 2003 | — |
| SC 13D/A | Amended ownership over 5% (active) | Apr 3, 2003 | — |
| SC 13G | Ownership over 5% (passive) | Jan 23, 2003 | — |
| SC 13G | Ownership over 5% (passive) | Jan 23, 2003 | — |
| SC 13D/A | Amended ownership over 5% (active) | Dec 20, 2002 | — |
| SC 13D/A | Amended ownership over 5% (active) | Nov 14, 2002 | — |
Showing 41 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Steel Works, Blast Furnaces & Rolling Mills (Coke Ovens) (SIC 3312)
- Listed as
- TS (NYSE), TNRSF (OTC)
- Headquarters
- Luxembourg, Luxembourg
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1190723
Other Steel Works, Blast Furnaces & Rolling Mills (Coke Ovens) companies
- Nucor Corp NUE
- ArcelorMittal MT
- Steel Dynamics Inc STLD
- Posco Holdings Inc. PKX
- Carpenter Technology Corp CRS
- COMMERCIAL METALS Co CMC
- GRUPO SIMEC, S.A.B. de C.V. SIM
- SunCoke Energy, Inc. SXC
All 13 Steel Works, Blast Furnaces & Rolling Mills (Coke Ovens) companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.