Tenaris SA
TS- Exchange
- NYSE
- Industry
- Steel Works, Blast Furnaces & Rolling Mills (Coke Ovens)
- SEC CIK
- 0001190723
No open-market purchases or sales by Tenaris SA insiders were filed in the last 90 days; 285 institutions reported holding it in 13F filings for Q2 2026, worth $2.13B in total; no superinvestor holds it.
Other share classesTNRSF
13F holders, Q3 2025
Institutional positions in Tenaris SA as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 223
- +3 vs. Q2 2025
- Shares held
- 35.7M
- −10.2M (−22.2%) vs. Q2 2025
- Total value
- $1.28B
- −$431.2M (−25.2%) vs. Q2 2025
- New holders
- 37
- 82 more added
- Sold out
- 34
- 65 more reduced
3 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting TS on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 285 | $2.13B |
| Q1 2026 | 264 | $2.29B |
| Q4 2025 | 229 | $1.27B |
| Q3 2025 | 223 | $1.28B |
| Q2 2025 | 223 | $1.71B |
| Q1 2025 | 227 | $2.01B |
| Q4 2024 | 234 | $1.90B |
| Q3 2024 | 201 | $1.60B |
| Q2 2024 | 224 | $1.70B |
| Q1 2024 | 236 | $2.19B |
| Q4 2023 | 222 | $2.16B |
| Q3 2023 | 216 | $1.94B |
| Q2 2023 | 201 | $1.93B |
| Q1 2023 | 227 | $1.74B |
| Q4 2022 | 218 | $2.07B |
| Q3 2022 | 179 | $1.66B |
| Q2 2022 | 182 | $1.61B |
| Q1 2022 | 182 | $2.08B |
| Q4 2021 | 144 | $1.04B |
| Q3 2021 | 130 | $1.03B |
| Q2 2021 | 143 | $1.19B |
| Q1 2021 | 127 | $1.32B |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Tenaris SA; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Kiltearn Partners LLP | 298,459 | $10.7M | 2.14% | −21,100−6.6% | Reduced |
| Jump Financial, LLC | 319,947 | $11.4M | 0.15% | +69,147+27.6% | Added |
| Royal Bank of Canada | 328,799 | $11.8M | 0.00% | +28,418+9.5% | Added |
| Jane Street Group, LLC | 378,260 | $13.5M | 0.02% | +83,005+28.1% | Added |
| Harding Loevner LP | 408,147 | $14.6M | 0.11% | −42,446−9.4% | Reduced |
| Assetmark, Inc | 480,215 | $17.2M | 0.04% | +10,986+2.3% | Added |
| Medina Singh Partners, LLC | 560,954 | $20.1M | 4.69% | +4,902+0.9% | Added |
| Millennium Management LLC | 574,423 | $20.5M | 0.02% | −202,540−26.1% | Reduced |
| D. E. Shaw & Co., Inc. | 597,082 | $21.4M | 0.02% | +375,071+168.9% | Added |
| Massachusetts Financial Services Co | 602,886 | $21.6M | 0.01% | −134,874−18.3% | Reduced |
| BlackRock, Inc. | 641,138 | $22.9M | 0.00% | +14,039+2.2% | Added |
| Goldman Sachs Group Inc | 705,183 | $25.2M | 0.00% | −225,048−24.2% | Reduced |
| Abc Arbitrage SA | 775,204 | $27.7M | 2.73% | +307,936+65.9% | Added |
| Optiver Holding B.V. | 905,328 | $32.4M | 0.53% | +589,625+186.8% | Added |
| Dimensional Fund Advisors LP | 1,134,260 | $40.6M | 0.01% | +192,794+20.5% | Added |
| Morgan Stanley | 1,171,617 | $41.9M | 0.00% | +52,861+4.7% | Added |
| Encompass Capital Advisors LLC | 1,432,704 | $51.2M | 2.31% | −300,077−17.3% | Reduced |
| Van Eck Associates Corp | 1,610,593 | $57.6M | 0.05% | −5,101−0.3% | Reduced |
| Price T Rowe Associates Inc | 1,787,345 | $63.9M | 0.01% | +89,348+5.3% | Added |
| Wellington Management Group LLP | 2,135,993 | $76.4M | 0.01% | +36,718+1.7% | Added |
| FMR LLC | 2,295,249 | $82.1M | 0.00% | −3,219−0.1% | Reduced |
| Renaissance Technologies LLC | 3,350,644 | $119.9M | 0.16% | +459,100+15.9% | Added |
| Westwood Global Investments, LLC | 7,591,660 | $271.6M | 6.78% | −239,707−3.1% | Reduced |
| Sourcerock Group LLC | 0 | $0 | 0.00% | −3,086,075−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −1,767,924−100.0% | Sold out |
| Capstone Investment Advisors, LLC | 0 | $0 | 0.00% | −921,547−100.0% | Sold out |
| Merewether Investment Management, LP | 0 | $0 | 0.00% | −533,515−100.0% | Sold out |
| Freestone Grove Partners LP | 0 | $0 | 0.00% | −362,510−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | 0 | $0 | 0.00% | −243,360−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −456,997−100.0% | Sold out |
| Lighthouse Investment Partners, LLC | 0 | $0 | 0.00% | −190,000−100.0% | Sold out |
| Boothbay Fund Management, LLC | 0 | $0 | 0.00% | −138,741−100.0% | Sold out |
| UBS Asset Management Americas Inc | 0 | $0 | 0.00% | −106,460−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −101,202−100.0% | Sold out |
| SummitTX Capital, L.P. | 0 | $0 | 0.00% | −91,784−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −88,385−100.0% | Sold out |
| Interval Partners, LP | 0 | $0 | 0.00% | −76,483−100.0% | Sold out |
| GTS Securities LLC | 0 | $0 | 0.00% | −54,421−100.0% | Sold out |
| Ashton Thomas Private Wealth, LLC | 0 | $0 | 0.00% | −29,511−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −20,247−100.0% | Sold out |
| TCFG Wealth Management, LLC | 0 | $0 | 0.00% | −14,245−100.0% | Sold out |
| Vestmark Advisory Solutions, Inc. | 0 | $0 | 0.00% | −13,696−100.0% | Sold out |
| Twin Tree Management, LP | 0 | $0 | 0.00% | −10,677−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −10,060−100.0% | Sold out |
| Bridgefront Capital, LLC | 0 | $0 | 0.00% | −7,180−100.0% | Sold out |
| Scientech Research LLC | 0 | $0 | 0.00% | −5,715−100.0% | Sold out |
| United Capital Financial Advisers, LLC | 0 | $0 | 0.00% | −5,366−100.0% | Sold out |
| Headlands Technologies LLC | 0 | $0 | 0.00% | −4,984−100.0% | Sold out |
| Bryn Mawr Trust Co | 0 | $0 | 0.00% | −2,001−100.0% | Sold out |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −1,318−100.0% | Sold out |
| Transce3nd, LLC | 0 | $0 | 0.00% | −488−100.0% | Sold out |
| Geneos Wealth Management Inc. | 0 | $0 | 0.00% | −409−100.0% | Sold out |
| Whipplewood Advisors, LLC | 0 | $0 | 0.00% | −256−100.0% | Sold out |
| IFP Advisors, Inc | 0 | $0 | 0.00% | −152−100.0% | Sold out |
| Sierra Ocean, LLC | 0 | $0 | 0.00% | −146−100.0% | Sold out |
| NewSquare Capital LLC | 0 | $0 | 0.00% | −135−100.0% | Sold out |
| Fifth Third Bancorp | 0 | $0 | 0.00% | −59−100.0% | Sold out |
| Atlas Capital Advisors LLC | – | – | – | – | Not filed |
| First Horizon Advisors, Inc. | – | – | – | – | Not filed |
| Financial Gravity Companies, Inc. | – | – | – | – | Not filed |