Tenaris SA (TS) shareholders
TSNYSESteel Works, Blast Furnaces & Rolling Mills (Coke Ovens)Also trades as TNRSF
$61.27+0.33 (+0.54%)
Close on Nov 13, 2026Market cap $32.84BP/E –Yield –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
38M
Shares held, 13F filers
Institutional holders
282
54 new, 30 sold out
Net institutional buying
-1M
In Q2 2026
Insider trades, 12 months
0 buys · 0 sales
Open-market trades only
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| Rocca & Partners Stichting Administratiekantoor Aandelen San Faustin Joint filing with San Faustin S.A. (68.60%), Techint Holdings S.A R.L. (68.60%) | 692,085,486 | 68.60% | 13D (active) amendment | Feb 6, 2026 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of TS | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| FMR LLC | 6,760,952 | – | $375.17M | −1,490,807 | 0.02% |
| Renaissance Technologies LLC | 3,056,044 | – | $169.58M | −143,700 | 0.23% |
| Van Eck Associates Corp | 2,478,526 | – | $137.53M | −414,506 | 0.08% |
| Wellington Management Group Llp | 2,458,033 | – | $136.40M | +52,999 | 0.02% |
| Price T Rowe Associates Inc /Md/ | 1,502,839 | – | $83.39M | +57,629 | 0.01% |
| Morgan Stanley | 1,238,988 | – | $68.75M | +60,919 | 0.00% |
| Goldman Sachs Group Inc | 1,179,501 | – | $65.45M | +458,607 | 0.01% |
| Merewether Investment Management, LP | 1,130,692 | – | $62.74M | New | 1.18% |
| Dimensional Fund Advisors LP | 1,039,883 | – | $57.70M | −81,124 | 0.01% |
| Holocene Advisors, LP | 1,030,105 | – | $57.16M | New | 0.13% |
| Driehaus Capital Management LLC | 1,001,129 | – | $55.55M | +112,783 | 0.32% |
| CWA Asset Management Group, LLC | 987,291 | – | $54.78M | +480,741 | 1.67% |
| Invesco Ltd. | 901,517 | – | $50.03M | −266,955 | 0.00% |
| BlackRock, Inc. | 747,509 | – | $41.48M | +31,718 | 0.00% |
| Jane Street Group, LLC | 716,734 | – | $39.77M | +615,896 | 0.00% |
| Marshall Wace, Llp | 704,368 | – | $39.09M | +696,368 | 0.03% |
| Massachusetts Financial Services Co /Ma/ | 628,372 | – | $35.26M | −18,482 | 0.01% |
| Millennium Management LLC | 619,526 | – | $34.38M | +550,803 | 0.01% |
| UBS Group AG | 581,680 | – | $32.28M | +82,702 | 0.00% |
| Bridgewater Associates, LP | 568,223 | – | $31.53M | +539,593 | 0.13% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|
| Q2 2026 | 282 | 38M | 54 / 100 | 79 / 30 | 9M | 10M |
| Q1 2026 | 264 | 39M | 70 / 86 | 67 / 32 | 12M | 5M |
| Q4 2025 | 229 | 33M | 48 / 75 | 70 / 38 | 5M | 7M |
| Q3 2025 | 222 | 36M | 37 / 81 | 66 / 34 | 4M | 14M |
| Q2 2025 | 222 | 46M | 37 / 89 | 67 / 38 | 6M | 12M |
| Q1 2025 | 226 | 52M | 34 / 72 | 83 / 35 | 11M | 10M |
| Q4 2024 | 233 | 51M | 59 / 63 | 77 / 24 | 9M | 10M |
| Q3 2024 | 200 | 51M | 29 / 69 | 72 / 51 | 12M | 16M |
| Q2 2024 | 224 | 56M | 33 / 80 | 82 / 43 | 10M | 14M |
| Q1 2024 | 235 | 60M | 46 / 75 | 79 / 30 | 8M | 13M |
| Q4 2023 | 222 | 65M | 36 / 74 | 81 / 27 | 18M | 15M |
| Q3 2023 | 216 | 61M | 39 / 71 | 74 / 23 | 12M | 20M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
71 funds held TS in Q2 2026, 20% of their shares through ETFs. Each fund counts once per quarter, from its quarter-end report.
| Fund | Shares | % of TS | Value | % of fund | As of |
|---|---|---|---|---|---|
| Fidelity Advisor Focused Emerging Markets Fund | 1,916,600 | – | $109.88M | 0.84% | Jul 31, 2026 |
| VanEck Oil Services ETF | 1,837,574 | – | $101.97M | 5.12% | Jun 30, 2026 |
| Vanguard Energy Opportunities Fund | 1,720,815 | – | $98.65M | 1.35% | Jul 31, 2026 |
| Fidelity Series Emerging Markets Opportunities Fund | 1,019,000 | – | $58.42M | 0.18% | Jul 31, 2026 |
| Strategic Advisers Fidelity Emerging Markets Fund | 871,500 | – | $53.10M | 0.13% | May 31, 2026 |
| MFS International New Discovery Fund | 598,667 | – | $33.22M | 0.44% | Jun 30, 2026 |
| Driehaus Emerging Markets Growth Fund | 444,143 | – | $24.65M | 0.48% | Jun 30, 2026 |
| Invesco International Small-Mid Company Fund | 392,759 | – | $22.52M | 0.94% | Jul 31, 2026 |
| T. Rowe Price Real Assets Fund, Inc. | 370,041 | – | $20.53M | 0.20% | Jun 30, 2026 |
| T. Rowe Price New Era Fund | 356,711 | – | $19.79M | 0.69% | Jun 30, 2026 |
| The Dfa International Value Series | 322,197 | – | $18.47M | 0.10% | Jul 31, 2026 |
| Strategic Advisers Emerging Markets Fund | 285,200 | – | $17.38M | 0.10% | May 31, 2026 |
| VIP Emerging Markets Portfolio | 263,900 | – | $14.64M | 0.77% | Jun 30, 2026 |
| Invesco International Dividend AchieversTM ETF | 251,927 | – | $14.44M | 1.56% | Jul 31, 2026 |
| Dimensional International Value ETF | 247,068 | – | $14.16M | 0.07% | Jul 31, 2026 |
Short interest
Shares sold short and not yet bought back, as of Oct 30, 2026 (FINRA, reported twice a month)
Short % of shares outstanding
–
3M shares short
Days to cover
3.2
At 1M shares a day
Change since last report
-1.3%
From 4M shares
Short volume, 20 days
42.2%
Of volume reported to FINRA
Shares sold short, last 12 months
Short sale volume counts trades marked short on any given day, including market-maker hedging, so it runs far higher than the share of Tenaris's stock actually held short. Settlement fails (shares not delivered on time) peaked at 3,793 shares on Sep 1, 2026 over the last 90 days.
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