TS Tenaris S.A.
Tenaris S.A. (TS) Institutional Ownership
What the institutions did with TS last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| FMR LLC | 6.8M | 17.6% |
| RENAISSANCE TECHNOLOGIES LLC | 3.1M | 8.0% |
| VAN ECK ASSOCIATES CORP | 2.5M | 6.5% |
| WELLINGTON MANAGEMENT GROUP LLP | 2.5M | 6.4% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.5M | 3.9% |
| MORGAN STANLEY | 1.2M | 3.2% |
| GOLDMAN SACHS GROUP INC | 1.2M | 3.1% |
| Merewether Investment Management, LP | 1.1M | 2.9% |
| DIMENSIONAL FUND ADVISORS LP | 1.0M | 2.7% |
| Holocene Advisors, LP | 1.0M | 2.7% |
| Driehaus Capital Management LLC | 1.0M | 2.6% |
| CWA Asset Management Group, LLC | 987.3K | 2.6% |
| Invesco Ltd. | 901.5K | 2.3% |
| BlackRock, Inc. | 747.5K | 1.9% |
| JANE STREET GROUP, LLC | 716.7K | 1.9% |
| MARSHALL WACE, LLP | 704.4K | 1.8% |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 628.4K | 1.6% |
| MILLENNIUM MANAGEMENT LLC | 619.5K | 1.6% |
| UBS Group AG | 581.7K | 1.5% |
| Bridgewater Associates, LP | 568.2K | 1.5% |
| ASSETMARK, INC | 560.9K | 1.5% |
| Aventail Capital Group, LP | 559.9K | 1.5% |
| Freestone Grove Partners LP | 504.5K | 1.3% |
| SIR Capital Management, L.P. | 368.6K | 1.0% |
| BANK OF AMERICA CORP /DE/ | 343.9K | 0.9% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Westwood Global Investments, LLC | Sold Out | 6.7M | 0 | -6.7M |
| FMR LLC | Reduced | 8.3M | 6.8M | -1.5M |
| Merewether Investment Management, LP | New | 0 | 1.1M | +1.1M |
| Holocene Advisors, LP | New | 0 | 1.0M | +1.0M |
| MARSHALL WACE, LLP | Increased | 8.0K | 704.4K | +696.4K |
| JANE STREET GROUP, LLC | Increased | 100.8K | 716.7K | +615.9K |
| MILLENNIUM MANAGEMENT LLC | Increased | 68.7K | 619.5K | +550.8K |
| Bridgewater Associates, LP | Increased | 28.6K | 568.2K | +539.6K |
| Freestone Grove Partners LP | New | 0 | 504.5K | +504.5K |
| CWA Asset Management Group, LLC | Increased | 506.6K | 987.3K | +480.7K |
| Aventail Capital Group, LP | Increased | 87.4K | 559.9K | +472.6K |
| GOLDMAN SACHS GROUP INC | Increased | 720.9K | 1.2M | +458.6K |
| VAN ECK ASSOCIATES CORP | Reduced | 2.9M | 2.5M | -414.5K |
| SIR Capital Management, L.P. | New | 0 | 368.6K | +368.6K |
| Invesco Ltd. | Reduced | 1.2M | 901.5K | -267.0K |
| BANK OF AMERICA CORP /DE/ | Increased | 158.4K | 343.9K | +185.5K |
| LMR Partners LLP | New | 0 | 172.3K | +172.3K |
| Grantham, Mayo, Van Otterloo & Co. LLC | Reduced | 347.6K | 189.6K | -158.0K |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | 3.2M | 3.1M | -143.7K |
| CAPITAL FUND MANAGEMENT S.A. | New | 0 | 125.4K | +125.4K |
| Medina Value Partners, LLC | Reduced | 253.4K | 134.1K | -119.3K |
| Connor, Clark & Lunn Investment Management Ltd. | Increased | 178.4K | 293.6K | +115.2K |
| Driehaus Capital Management LLC | Increased | 888.3K | 1.0M | +112.8K |
| FEARNLEY ASSET MANAGEMENT AS | Sold Out | 112.7K | 0 | -112.7K |
| Y-Intercept (Hong Kong) Ltd | New | 0 | 112.4K | +112.4K |
| XTX Topco Ltd | Increased | 14.3K | 124.7K | +110.3K |
| Point72 Asset Management, L.P. | New | 0 | 103.5K | +103.5K |
| HRT FINANCIAL LP | Increased | 39.8K | 124.3K | +84.5K |
| UBS Group AG | Increased | 499.0K | 581.7K | +82.7K |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 1.1M | 1.0M | -81.1K |
| ExodusPoint Capital Management, LP | Increased | 11.4K | 92.0K | +80.7K |
| Energy Income Partners, LLC | New | 0 | 80.2K | +80.2K |
| ASSETMARK, INC | Increased | 490.8K | 560.9K | +70.1K |
| Lighthouse Investment Partners, LLC | Increased | 42.5K | 105.7K | +63.2K |
| MORGAN STANLEY | Increased | 1.2M | 1.2M | +60.9K |
| STATE STREET CORP | Reduced | 203.2K | 143.5K | -59.7K |
| CITADEL ADVISORS LLC | Reduced | 292.4K | 232.9K | -59.5K |
| Carrhae Capital LLP | Reduced | 337.4K | 278.3K | -59.1K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 1.4M | 1.5M | +57.6K |
| WELLINGTON MANAGEMENT GROUP LLP | Increased | 2.4M | 2.5M | +53.0K |
| J. Goldman & Co LP | New | 0 | 49.5K | +49.5K |
| Nuveen, LLC | New | 0 | 47.0K | +47.0K |
| CENTRAL VALLEY ADVISORS, LLC | New | 0 | 46.6K | +46.6K |
| FIRST TRUST ADVISORS LP | Increased | 14.3K | 60.4K | +46.1K |
| Balyasny Asset Management L.P. | New | 0 | 45.2K | +45.2K |
| ACADIAN ASSET MANAGEMENT LLC | Increased | 3.1K | 41.5K | +38.4K |
| AQR CAPITAL MANAGEMENT LLC | Increased | 145.4K | 183.5K | +38.0K |
| Crossmark Global Holdings, Inc. | Reduced | 48.5K | 11.3K | -37.2K |
| Walleye Capital LLC | New | 0 | 36.7K | +36.7K |
| AMERICAN CENTURY COMPANIES INC | Increased | 28.7K | 64.9K | +36.2K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Increased | 6.9K | 39.1K | +32.2K |
| Capital Wealth Planning, LLC | Reduced | 240.5K | 208.4K | -32.1K |
| Fulcrum Asset Management LLP | New | 0 | 32.1K | +32.1K |
| BlackRock, Inc. | Increased | 715.8K | 747.5K | +31.7K |
| Kiltearn Partners LLP | Reduced | 204.9K | 173.8K | -31.1K |
| Harding Loevner LP | Reduced | 292.9K | 264.2K | -28.7K |
| Ethic Inc. | Reduced | 125.6K | 99.0K | -26.6K |
| Schonfeld Strategic Advisors LLC | New | 0 | 25.0K | +25.0K |
| FORA Capital, LLC | Sold Out | 23.0K | 0 | -23.0K |
| GTS SECURITIES LLC | Reduced | 62.7K | 40.0K | -22.7K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.