TSNYSESteel Works, Blast Furnaces & Rolling Mills (Coke Ovens)Also trades as TNRSF
TENARIS SA
Financials through fiscal 2025, year ended Dec 31, 2025Last filing: 20-F on Mar 31, 2026
$58.41−0.98 (-1.65%)
Close on Oct 19, 2026
- Market cap
- –
- P/E (TTM)
- –
- Dividend 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 | 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 | – | $83.39K | +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)
| 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 |