Who owns TENARIS SA?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of TS from SEC Form 13F filings across 285 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 285 institutions disclosed 38.4M shares of TENARIS SA worth $2.13B — about 7.6% of shares outstanding; the largest disclosed holder is FMR LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
285
13F holders
$2.13B
value, 2026 filers
7.6%
of shares outstanding (38.4M sh)
57
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of TS's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 6.8M | $375.2M | 0.0% | 1.3% | -18.1% |
| 2 | RENAISSANCE TECHNOLOGIES LLC | 3.1M | $169.6M | 0.2% | 0.6% | -4.5% |
| 3 | VAN ECK ASSOCIATES CORP | 2.5M | $137.5M | 0.1% | 0.5% | -14.3% |
| 4 | WELLINGTON MANAGEMENT GROUP LLP | 2.5M | $136.4M | 0.0% | 0.5% | +2.2% |
| 5 | PRICE T ROWE ASSOCIATES INC /MD/ | 1.5M | $83.4M | 0.0% | 0.3% | +4.0% |
| 6 | MORGAN STANLEY | 1.2M | $68.8M | 0.0% | 0.2% | +5.2% |
| 7 | GOLDMAN SACHS GROUP INC | 1.2M | $65.5M | 0.0% | 0.2% | +63.6% |
| 8 | Merewether Investment Management, LPNEW | 1.1M | $62.7M | 1.2% | 0.2% | new |
| 9 | DIMENSIONAL FUND ADVISORS LP | 1.0M | $57.7M | 0.0% | 0.2% | -7.2% |
| 10 | Holocene Advisors, LPNEW | 1.0M | $57.2M | 0.1% | 0.2% | new |
| 11 | Driehaus Capital Management LLC | 1.0M | $55.6M | 0.3% | 0.2% | +12.7% |
| 12 | CWA Asset Management Group, LLC | 987,291 | $54.8M | 1.7% | 0.2% | +94.9% |
| 13 | Invesco Ltd. | 901,517 | $50.0M | 0.0% | 0.2% | -22.8% |
| 14 | BlackRock, Inc. | 747,509 | $41.5M | 0.0% | 0.1% | +4.4% |
| 15 | JANE STREET GROUP, LLC | 716,734 | $39.8M | 0.0% | 0.1% | +610.8% |
| 16 | MARSHALL WACE, LLP | 704,368 | $39.1M | 0.0% | 0.1% | +8704.6% |
| 17 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 628,372 | $35.3M | 0.0% | 0.1% | -2.9% |
| 18 | MILLENNIUM MANAGEMENT LLC | 619,526 | $34.4M | 0.0% | 0.1% | +801.5% |
| 19 | UBS Group AG | 581,680 | $32.3M | 0.0% | 0.1% | +16.6% |
| 20 | Bridgewater Associates, LP | 568,223 | $31.5M | 0.1% | 0.1% | +1884.7% |
| 21 | ASSETMARK, INC | 560,853 | $31.1M | 0.1% | 0.1% | +14.3% |
| 22 | Aventail Capital Group, LP | 559,941 | $31.1M | 1.8% | 0.1% | +540.9% |
| 23 | Freestone Grove Partners LPNEW | 504,463 | $28.0M | 0.2% | 0.1% | new |
| 24 | SIR Capital Management, L.P.NEW | 368,588 | $20.5M | 2.4% | 0.1% | new |
| 25 | BANK OF AMERICA CORP /DE/ | 343,934 | $19.1M | 0.0% | 0.1% | +117.1% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.