TENARIS SA

TSNYSE

$58.46+2.47 (+4.41%)as of Oct 5, 2026

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

TENARIS SA price and activity chart data

Showing the 1Y range: Oct 6, 2025 to Oct 5, 2026. Price (+61.6%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
FMR LLC	0.63%	$375M	0.02%	Not reported
Renaissance Technologies LLC	0.29%	$170M	0.23%	Not reported
Van Eck Associates Corp	0.23%	$138M	0.08%	Reduce 14.33%
Wellington Management Group LLP	0.23%	$136M	0.02%	Add 2.20%
Morgan Stanley	0.12%	$68.8M	0.00%	Not reported
Goldman Sachs Group Inc	0.11%	$65.5M	0.01%	Not reported
Merewether Investment Management, LP	0.11%	$62.7M	1.18%	New Not reported
Dimensional Fund Advisors LP	0.10%	$57.7M	0.01%	Not reported
Holocene Advisors, LP	0.10%	$57.2M	0.13%	New Not reported
Driehaus Capital Management LLC	0.09%	$55.6M	0.32%	Add 12.70%
CWA Asset Management Group, LLC	0.09%	$54.8M	1.67%	Add 94.90%
Invesco Ltd.	0.08%	$50M	0.00%	Not reported
BlackRock, Inc.	0.07%	$41.5M	0.00%	Not reported
Jane Street Group, LLC	0.07%	$39.8M	0.00%	Not reported
Marshall Wace, LLP	0.07%	$39.1M	0.03%	Not reported
Massachusetts Financial Services Co	0.06%	$35.3M	0.01%	Reduce 2.86%
Millennium Management LLC	0.06%	$34.4M	0.01%	Not reported
UBS Group AG	0.05%	$32.3M	0.00%	Not reported
Bridgewater Associates, LP	0.05%	$31.5M	0.13%	Add 1884.71%
Assetmark, Inc	0.05%	$31.1M	0.05%	Add 14.28%
Aventail Capital Group, LP	0.05%	$31.1M	1.78%	Add 540.91%
Freestone Grove Partners LP	0.05%	$28M	0.18%	New Not reported
SIR Capital Management, L.P.	0.03%	$20.5M	2.35%	New Not reported
Bank of America Corp	0.03%	$19.1M	0.00%	Not reported
Carrhae Capital LLP	0.03%	$15.4M	0.43%	Reduce 17.52%
Harding Loevner LP	0.02%	$14.7M	0.14%	Reduce 9.79%
Citadel Advisors LLC	0.02%	$12.9M	0.00%	Not reported
Northern Trust Corp	0.02%	$11.7M	0.00%	Not reported
Capital Wealth Planning, LLC	0.02%	$11.6M	0.06%	Reduce 13.35%
Grantham, Mayo, Van Otterloo & Co. LLC	0.02%	$10.5M	0.02%	Reduce 45.46%
AQR Capital Management LLC	0.02%	$10.2M	0.00%	Not reported
Kiltearn Partners LLP	0.02%	$9.64M	2.34%	Reduce 15.18%
Quantinno Capital Management LP	0.02%	$9.09M	0.01%	Add 11.91%
State Street Corp	0.01%	$7.96M	0.00%	Not reported
Medina Value Partners, LLC	0.01%	$7.44M	1.46%	Reduce 47.07%
Legal & General Group Plc	0.01%	$7.19M	0.00%	Not reported
Capital Fund Management S.A.	0.01%	$6.96M	0.03%	New Not reported
XTX Topco Ltd	0.01%	$6.92M	0.09%	Not reported
Y-Intercept (Hong Kong) Ltd	0.01%	$6.24M	0.12%	Not reported
Lighthouse Investment Partners, LLC	0.01%	$5.86M	0.16%	Add 148.60%
Point72 Asset Management, L.P.	0.01%	$5.74M	0.01%	Not reported
Ethic Inc.	0.01%	$5.49M	0.07%	Reduce 21.17%
ExodusPoint Capital Management, LP	0.01%	$5.11M	0.03%	Not reported
Creative Planning	0.01%	$4.94M	0.00%	Not reported
Silvercrest Asset Management Group LLC	0.01%	$4.49M	0.03%	Reduce 19.71%
Leuthold Group, LLC	0.01%	$4.46M	0.45%	Reduce 4.32%
Energy Income Partners, LLC	0.01%	$4.45M	0.07%	New Not reported
Integrated Quantitative Investments LLC	0.01%	$4.2M	0.69%	Add 13.38%
American Century Companies Inc	0.01%	$3.6M	0.00%	Not reported
Charles Schwab Investment Management Inc	0.01%	$3.6M	0.00%	Not reported

50 of 261 holders

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