TS · Tenaris SA · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Superinvestors Holding TS
All superinvestors →Holder Concentration
Across 287 13F filersWho Holds TS
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 285 filers, like-for-like change -2.3%; actively managed books -3.1%; index-like books +2.0%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 51.4% | 175 | -9.3% |
| Exempt adviser | 2.6% | 3 | +719.4% |
| Adviser | 3.2% | 8 | -26.0% |
| Bank | 4.3% | 17 | +16.4% |
| Broker-dealer | 0.1% | 2 | -26.9% |
| Non-US | 0.1% | 3 | +11.8% |
| Holding company | 32.4% | 9 | -6.7% |
| Benefit plan | 0.0% | 0 | — |
| Registered fund | 0.0% | 0 | — |
| Unknown | 6.0% | 68 | +141.3% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 16.6% | 19 | +2.0% |
| Systematic-like | 5.4% | 17 | +299.9% |
| Concentrated | 2.2% | 73 | -89.0% |
| Diversified active | 75.8% | 176 | +17.3% |
| Unknown | 0.0% | 0 | -100.0% |
| Not measured | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 46.7% | 168 | -30.4% |
| Medium turnover | 33.1% | 53 | +8.3% |
| High turnover | 20.0% | 43 | +371.1% |
| Unknown | 0.2% | 21 | -52.9% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 3.6% | 34 | +88.3% |
| Medium horizon | 9.7% | 60 | +142.8% |
| Long horizon | 77.9% | 171 | -16.7% |
| Unknown | 8.9% | 20 | +194.2% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 3.0% | 78 | +14.6% |
| $1B to $10B | 10.7% | 84 | -51.6% |
| $10B to $100B | 24.4% | 70 | +40.9% |
| $100B or more | 61.8% | 53 | +2.6% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 6.8% | 112 | +24.4% |
| Pooled investment vehicles | 23.0% | 24 | -21.8% |
| Registered funds and BDCs | 15.9% | 18 | -5.1% |
| Pension and profit sharing plans | 0.0% | 2 | +3722.0% |
| Governments and sovereign funds | 0.2% | 2 | +13.7% |
| Other investment advisers | 0.4% | 6 | -18.9% |
| Diversified | 5.0% | 10 | +15.4% |
| Charitable organizations | 0.0% | 0 | -100.0% |
| Corporations | 0.0% | 0 | -100.0% |
| Insurance companies | 0.0% | 0 | — |
| Unknown | 48.6% | 111 | +6.4% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 32.5% | 40 | +91.1% |
| Private equity funds | 0.5% | 8 | +8.2% |
| Venture capital funds | 0.0% | 1 | +28.1% |
| Real estate funds | 0.0% | 2 | +31.3% |
| Securitized asset funds | 0.1% | 1 | +468.4% |
| Other private funds | 7.4% | 15 | -70.4% |
| Mixed private funds | 0.0% | 0 | — |
| Private funds, type not stated | 8.6% | 4 | -10.1% |
| No private funds | 4.9% | 106 | -3.0% |
| Unknown | 46.1% | 108 | +1.5% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 92.2% | 260 | -5.6% |
| Outside the US | 7.8% | 25 | +66.1% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 3 holders with no observed 2026-03-31 13F and 4 holders with no observed 2026-06-30 13F.
Conviction and Crowding
285 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net sellers of $7,940,943 (0 buying, 2 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 40.8% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies TS's active holders also own, quarter ended Jun 30, 2026Shareholder Targets
13F filers that own its peers but not TS, quarter ended Jun 30, 2026Found through its holder-overlap peers: ATMU, PRDO, ERIC, E, BKV, G, IAG, NTES, NOV, SUNC, PBF, MT, TTE, SBS, BFH, RS, IMO, NXT, WFRD, OVV. 1,885 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | Amundi Holding company, Index-like | $16,601,398,525 14 held | TTE, NXT, SBS |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser, Diversified active | $4,506,227,689 12 held | RS, OVV, NXT |
| 3 | Capital World Investors Adviser, Diversified active | $4,068,995,759 3 held | TTE, WFRD, NTES |
| 4 | DEUTSCHE BANK AG\ Non-US, Diversified active | $3,843,518,250 19 held | TTE, NXT, SBS |
| 5 | NORGES BANK Non-US, Index-like | $3,811,874,958 10 held | TTE, RS, NXT |
| 6 | Capital International Investors Adviser, Diversified active | $3,763,097,338 2 held | TTE, NTES |
| 7 | CAISSE DES DEPOTS ET CONSIGNATIONS Unknown, Concentrated | $2,361,438,774 1 held | TTE |
| 8 | GEODE CAPITAL MANAGEMENT, LLC Registered adviser, Index-like | $2,163,769,443 16 held | NXT, RS, OVV |
| 9 | FIL Ltd Non-US, Diversified active | $2,163,486,795 9 held | TTE, IMO, IAG |
| 10 | First Eagle Investment Management, LLC Registered adviser, Diversified active | $2,092,175,602 3 held | IMO, NOV, RS |
Fund Ownership of TS by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 0.48% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 0.00% | 10,821 |
| Index ETFs | 0.48% | 2,428,080 |
| Active ETFs | 0.17% | 859,666 |
| Active funds | 1.74% | 8,765,436 |
| Unclassified | 0.02% | 85,011 |
| All registered funds | 2.41% | 12,149,014 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega FMR LLC Holding company | $375,165,225 | 17.31% | 6,760,952 | Shares | 2026-08-13 | |
| Large RENAISSANCE TECHNOLOGIES LLC Registered adviser | $169,579,881 | 7.82% | 3,056,044 | Shares | 2026-08-13 | |
| Mega VAN ECK ASSOCIATES CORP Registered adviser | $137,533,407 | 6.35% | 2,478,526 | Shares | 2026-08-14 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP Holding company | $136,396,249 | 6.29% | 2,458,033 | Shares | 2026-08-14 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $83,392,535 | 3.85% | 1,502,839 | Shares | 2026-08-14 | |
| Mega MORGAN STANLEY Holding company | $68,751,440 | 3.17% | 1,238,988 | Shares | 2026-08-13 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $65,450,509 | 3.02% | 1,179,501 | Shares | 2026-08-14 | |
| Mid Merewether Investment Management, LP Registered adviser | $62,742,099 | 2.89% | 1,130,692 | Shares | 2026-08-14 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $57,703,106 | 2.66% | 1,039,883 | Shares | 2026-08-11 | |
| Large Holocene Advisors, LP Registered adviser | $57,160,526 | 2.64% | 1,030,105 | Shares | 2026-08-14 | |
| Large Driehaus Capital Management LLC Registered adviser | $55,552,648 | 2.56% | 1,001,129 | Shares | 2026-08-14 | |
| Mega Invesco Ltd. Adviser | $50,025,177 | 2.31% | 901,517 | Shares | 2026-08-14 | |
| Mid CWA Asset Management Group, LLC Registered adviser | $45,777,272 | 2.11% | 829,599 | Shares | 2026-10-19 | |
| Mega BlackRock, Inc. Holding company | $41,479,273 | 1.91% | 747,509 | Shares | 2026-08-07 | |
| Mega JANE STREET GROUP, LLC | $39,771,569 | 1.83% | 716,734 | Shares | 2026-08-14 | |
| Mega MARSHALL WACE, LLP Exempt adviser | $39,085,379 | 1.80% | 704,368 | Shares | 2026-08-13 | |
| Mega MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Registered adviser | $34,868,360 | 1.61% | 628,372 | Shares | 2026-08-03 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $34,377,497 | 1.59% | 619,526 | Shares | 2026-08-14 | |
| Mega UBS Group AG Bank | $32,277,422 | 1.49% | 581,680 | Shares | 2026-08-13 | |
| Large ASSETMARK, INC Registered adviser | $31,607,379 | 1.46% | 572,805 | Shares | 2026-10-21 | |
| Large Bridgewater Associates, LP Registered adviser | $31,530,694 | 1.45% | 568,223 | Shares | 2026-08-14 | |
| Mid Aventail Capital Group, LP Registered adviser | $31,071,126 | 1.43% | 559,941 | Shares | 2026-08-14 | |
| Large Freestone Grove Partners LP Registered adviser | $27,992,651 | 1.29% | 504,463 | Shares | 2026-08-14 | |
| Small SIR Capital Management, L.P. | $20,452,948 | 0.94% | 368,588 | Shares | 2026-08-14 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $19,084,896 | 0.88% | 343,934 | Shares | 2026-08-14 | |
| Large Connor, Clark & Lunn Investment Management Ltd. Registered adviser | $16,291,808 | 0.75% | 293,599 | Shares | 2026-08-13 | |
| Mid Carrhae Capital LLP Registered adviser | $16,106,269 | 0.74% | 291,886 | Shares | 2026-10-20 | |
| Large Harding Loevner LP Registered adviser | $14,659,681 | 0.68% | 264,186 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $14,194,342 | 0.65% | 255,800 | Put | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $12,922,288 | 0.60% | 232,876 | Shares | 2026-09-02 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $11,819,370 | 0.55% | 213,000 | Call | 2026-08-14 | |
| Mega NORTHERN TRUST CORP Bank | $11,726,478 | 0.54% | 211,326 | Shares | 2026-08-13 | |
| Large Capital Wealth Planning, LLC Registered adviser | $11,564,559 | 0.53% | 208,408 | Shares | 2026-08-14 | |
| Large Grantham, Mayo, Van Otterloo & Co. LLC Adviser | $10,519,183 | 0.49% | 189,569 | Shares | 2026-08-13 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $10,181,082 | 0.47% | 183,476 | Shares | 2026-08-14 | |
| Small Kiltearn Partners LLP Registered adviser | $9,642,275 | 0.44% | 173,766 | Shares | 2026-08-12 | |
| Large LMR Partners LLP Exempt adviser | $9,562,203 | 0.44% | 172,323 | Shares | 2026-08-14 | |
| Large Quantinno Capital Management LP Registered adviser | $9,088,263 | 0.42% | 163,782 | Shares | 2026-08-13 | |
| Mega NATIONAL BANK OF CANADA /FI/ Bank | $8,129,118 | 0.38% | 146,497 | Shares | 2026-08-10 | |
| Mega STATE STREET CORP Bank | $7,961,538 | 0.37% | 143,477 | Shares | 2026-09-22 | |
| Small Medina Value Partners, LLC Registered adviser | $7,441,652 | 0.34% | 134,108 | Shares | 2026-08-14 | |
| Mega Legal & General Group Plc | $7,193,557 | 0.33% | 129,637 | Shares | 2026-08-14 | |
| Large CAPITAL FUND MANAGEMENT S.A. | $6,960,665 | 0.32% | 125,440 | Shares | 2026-08-13 | |
| Mid XTX Topco Ltd | $6,917,161 | 0.32% | 124,656 | Shares | 2026-08-14 | |
| Large HRT FINANCIAL LP | $6,896,741 | 0.32% | 124,288 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $6,037,312 | 0.28% | 108,800 | Call | 2026-08-14 | |
| Mid Lighthouse Investment Partners, LLC Registered adviser | $5,862,795 | 0.27% | 105,655 | Shares | 2026-08-14 | |
| Large Point72 Asset Management, L.P. Registered adviser | $5,743,325 | 0.26% | 103,502 | Shares | 2026-08-14 | |
| Large PEAK6 LLC Broker-dealer | $5,549,000 | 0.26% | 100,000 | Call | 2026-08-13 | |
| Mid Ethic Inc. Registered adviser | $5,492,844 | 0.25% | 98,988 | Shares | 2026-07-29 | |
| Large ExodusPoint Capital Management, LP Registered adviser | $5,107,521 | 0.24% | 92,044 | Shares | 2026-08-14 | |
| Mega Creative Planning Registered adviser | $4,935,390 | 0.23% | 88,942 | Shares | 2026-08-13 | |
| Large SILVERCREST ASSET MANAGEMENT GROUP LLC Registered adviser | $4,488,308 | 0.21% | 80,885 | Shares | 2026-08-14 | |
| Small LEUTHOLD GROUP, LLC Registered adviser | $4,459,564 | 0.21% | 80,367 | Shares | 2026-08-04 | |
| Mid Energy Income Partners, LLC Registered adviser | $4,449,188 | 0.21% | 80,180 | Shares | 2026-08-07 | |
| Small Integrated Quantitative Investments LLC Registered adviser | $4,202,479 | 0.19% | 75,734 | Shares | 2026-08-14 | |
| Mid DEPRINCE RACE & ZOLLO INC Registered adviser | $3,749,867 | 0.17% | 67,957 | Shares | 2026-10-13 | |
| Mega AMERICAN CENTURY COMPANIES INC | $3,602,577 | 0.17% | 64,923 | Shares | 2026-08-12 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $3,598,747 | 0.17% | 64,854 | Shares | 2026-08-14 | |
| Mega CITIGROUP INC Bank | $3,565,230 | 0.16% | 64,250 | Shares | 2026-08-03 | |
| Large GUGGENHEIM CAPITAL LLC | $3,426,063 | 0.16% | 61,742 | Shares | 2026-08-12 | |
| Mega FIRST TRUST ADVISORS LP Registered adviser | $3,350,708 | 0.15% | 60,384 | Shares | 2026-08-11 | |
| Large LAZARD ASSET MANAGEMENT LLC Adviser | $3,256,153 | 0.15% | 58,680 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $2,807,794 | 0.13% | 50,600 | Put | 2026-08-14 | |
| Mid J. Goldman & Co LP Registered adviser | $2,746,755 | 0.13% | 49,500 | Shares | 2026-08-14 | |
| Small CENTRAL VALLEY ADVISORS, LLC | $2,623,257 | 0.12% | 47,540 | Shares | 2026-10-27 | |
| Mega Nuveen, LLC | $2,608,529 | 0.12% | 47,009 | Shares | 2026-08-11 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $2,600,259 | 0.12% | 46,860 | Shares | 2026-08-14 | |
| Mid Campbell & CO Investment Adviser LLC Registered adviser | $2,584,668 | 0.12% | 46,579 | Shares | 2026-08-03 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $2,580,285 | 0.12% | 46,500 | Put | 2026-09-02 | |
| Large Balyasny Asset Management L.P. Registered adviser | $2,510,256 | 0.12% | 45,238 | Shares | 2026-08-14 | |
| Mid HIGHLAND CAPITAL MANAGEMENT, LLC Registered adviser | $2,403,089 | 0.11% | 43,550 | Shares | 2026-10-26 | |
| Large Vident Advisory, LLC Registered adviser | $2,396,556 | 0.11% | 43,189 | Shares | 2026-08-12 | |
| Large ACADIAN ASSET MANAGEMENT LLC | $2,301,780 | 0.11% | 41,481 | Shares | 2026-08-13 | |
| Large Pathstone Holdings, LLC | $2,238,465 | 0.10% | 40,340 | Shares | 2026-08-13 | |
| Mid GTS SECURITIES LLC | $2,218,545 | 0.10% | 39,981 | Shares | 2026-08-14 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $2,167,605 | 0.10% | 39,063 | Shares | 2026-08-13 | |
| Large Mariner, LLC Registered adviser | $2,040,589 | 0.09% | 36,774 | Shares | 2026-08-13 | |
| Large Walleye Capital LLC Registered adviser | $2,033,763 | 0.09% | 36,651 | Shares | 2026-08-03 | |
| Mega BANK OF MONTREAL /CAN/ Bank | $2,025,273 | 0.09% | 36,498 | Shares | 2026-08-12 | |
| Mid MANNING & NAPIER ADVISORS LLC Registered adviser | $2,019,836 | 0.09% | 36,400 | Shares | 2026-08-14 | |
| Mega JPMORGAN CHASE & CO Bank | $1,952,522 | 0.09% | 35,187 | Shares | 2026-08-12 | |
| Large O'SHAUGHNESSY ASSET MANAGEMENT, LLC Registered adviser | $1,879,446 | 0.09% | 33,870 | Shares | 2026-08-13 | |
| Large NEW YORK STATE COMMON RETIREMENT FUND | $1,853,310 | 0.09% | 33,399 | Shares | 2026-07-29 | |
| Large Cerity Partners LLC Registered adviser | $1,801,370 | 0.08% | 32,463 | Shares | 2026-08-14 | |
| Mid Fulcrum Asset Management LLP Registered adviser | $1,779,897 | 0.08% | 32,076 | Shares | 2026-08-18 | |
| Large MERCER GLOBAL ADVISORS INC /ADV Registered adviser | $1,728,735 | 0.08% | 31,154 | Shares | 2026-08-19 | |
| Small Mork Capital Management, LLC Registered adviser | $1,571,476 | 0.07% | 28,320 | Shares | 2026-08-14 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $1,475,423 | 0.07% | 26,589 | Shares | 2026-08-13 | |
| Large Schonfeld Strategic Advisors LLC Registered adviser | $1,385,529 | 0.06% | 24,969 | Shares | 2026-08-14 | |
| Small Cadence Wealth Management LLC | $1,379,647 | 0.06% | 24,863 | Shares | 2026-08-12 | |
| Mid VIKING FUND MANAGEMENT LLC Registered adviser | $1,379,500 | 0.06% | 25,000 | Shares | 2026-10-14 | |
| Mid Hennion & Walsh Asset Management, Inc. Adviser | $1,375,416 | 0.06% | 24,926 | Shares | 2026-10-13 | |
| Large Savant Capital, LLC Registered adviser | $1,364,055 | 0.06% | 24,582 | Shares | 2026-08-10 | |
| Mid Callan Family Office, LLC Registered adviser | $1,358,506 | 0.06% | 24,482 | Shares | 2026-08-11 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $1,319,772 | 0.06% | 23,784 | Shares | 2026-08-14 | |
| Small VIEWPOINT INVESTMENT PARTNERS CORP | $1,318,802 | 0.06% | 23,900 | Shares | 2026-10-26 | |
| Large Vanguard Personalized Indexing Management, LLC Registered adviser | $1,309,231 | 0.06% | 23,594 | Shares | 2026-08-11 | |
| Mid Laird Norton Wetherby Trust Company, LLC | $1,271,053 | 0.06% | 22,906 | Shares | 2026-08-14 | |
| Mid EVERGREEN CAPITAL MANAGEMENT LLC Registered adviser | $1,241,329 | 0.06% | 22,496 | Shares | 2026-10-23 |
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