Tenaris Ownership | Who Owns Tenaris?

Tenaris Ownership Summary

Tenaris is owned by 7.39% institutional investors, and 92.61% retail investors. Fmr is the largest institutional shareholder, holding 1.30% of TS shares. GMO Intl Op Value Composite is the top mutual fund, with 0.53% of its assets in Tenaris shares.

TS Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Tenaris	7.39%	-	92.61%
Sector	Energy Stocks	62.94%	15.44%	21.62%
Industry	Oil & Gas Equipment & Services Stocks	73.88%	13.79%	12.33%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Fmr	6.76M	1.30%	$375.17M
Renaissance	3.06M	0.59%	$169.58M
Van eck associates	2.48M	0.48%	$137.53M
Wellington management group llp	2.46M	0.47%	$136.40M
Price t rowe associates inc /md/	1.50M	0.29%	$83.39M
Encompass capital advisors	1.43M	0.27%	$51.25M
Morgan stanley	1.24M	0.24%	$68.75M
Goldman sachs group	1.18M	0.23%	$65.45M
Merewether investment management, lp	1.13M	0.22%	$62.74M
Dimensional fund advisors lp	1.04M	0.20%	$57.70M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Oslo asset management as	95.03K	3.36%	$2.91M
Sir capital management	368.59K	2.35%	$20.45M
Kiltearn partners llp	173.77K	2.34%	$9.64M
Encompass capital advisors	1.43M	1.80%	$51.25M
Aventail capital group, lp	559.94K	1.78%	$31.07M
Cwa asset management group	987.29K	1.67%	$54.78M
Medina value partners	134.11K	1.46%	$7.44M
Merewether investment management, lp	1.13M	1.18%	$62.74M
Mork capital management	28.32K	1.01%	$1.57M
Illumine investment management	17.60K	0.79%	$1.02M

Top Buyers

Holder	Shares	% Assets	Change
Merewether investment management, lp	1.13M	1.18%	1.13M
Holocene advisors, lp	1.03M	0.13%	1.03M
Marshall wace, llp	704.37K	0.03%	696.37K
Jane street group	716.73K	0.00%	615.90K
Optiver b.v.	905.33K	0.01%	589.63K

Top Sellers

Holder	Shares	% Assets	Change
Westwood global investments	-	-	-6.67M
Sourcerock group	-	-	-3.09M
Alua capital management lp	-	-	-2.39M
Fmr	6.76M	0.02%	-1.49M
Capstone investment advisors	-	-	-921.55K

New Positions

Holder	Shares	% Assets	Change	Value
Merewether investment management, lp	1.13M	1.18%	1.13M	$62.74M
Holocene advisors, lp	1.03M	0.13%	1.03M	$57.16M
Freestone grove partners lp	504.46K	0.18%	504.46K	$27.99M
Sir capital management	368.59K	2.35%	368.59K	$20.45M
Qube research	240.92K	0.01%	240.92K	$8.62M

Sold Out

Holder	Change
Sachetta	-1.00
Cullen/frost bankers	-5.00
Palisade asset management	-5.00
Abound wealth management	-6.00
Mendota financial group	-8.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	292	5.42%	38,422,190	-2.32%	7	12.91%	155	-3.13%	78	20.00%
Mar 31, 2026	200	-15.25%	18,767,814	-43.00%	3	9.66%	116	-4.92%	43	-39.44%
Dec 31, 2025	168	-26.64%	21,743,982	-39.10%	4	9.19%	86	-28.93%	48	-27.27%
Sep 30, 2025	221	0.91%	28,110,309	-17.27%	5	52.44%	116	-4.92%	64	-
Jun 30, 2025	223	-3.88%	38,025,167	-13.77%	3	21.06%	122	14.02%	66	-19.51%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
GMO Intl Op Value Composite	2.83M	0.53%	2.83M
FIAM Concentrated Emerging Markets Comp	2.35M	0.47%	2.35M
Fidelity Advisor Focused Em Mkts I	1.92M	0.38%	-
Vanguard Energy Inv	1.76M	0.35%	21.59K
Vanguard Energy Opportunities Inv	1.72M	0.34%	-43.72K
VanEck Oil Services ETF	1.70M	0.34%	-
Orbis Global Equity Investor	1.47M	0.27%	-
Fidelity Series Emerging Markets Opps	1.02M	0.20%	-126.70K
Fidelity Emerging Markets Class F	989.70K	0.20%	-
Strategic Advisers Fidelity Em Mkts	848.20K	0.17%	-23.30K

TS Ownership FAQ

Who Owns Tenaris?

Tenaris shareholders are primarily institutional investors at 7.39%, followed by 0% insiders and 0% retail investors. The average institutional ownership in Tenaris's industry, Oil & Gas Equipment & Services Stocks, is 73.88%, which Tenaris falls below.

Who owns the most shares of Tenaris?

Tenaris’s largest shareholders are Fmr (6.76M shares, 1.30%), Renaissance (3.06M shares, 0.59%), and Van eck associates (2.48M shares, 0.48%). Together, they hold 2.37% of Tenaris’s total shares outstanding.

Does Blackrock own Tenaris?

BlackRock is not among the top 10 institutional shareholders of Tenaris.

Who is Tenaris’s biggest shareholder by percentage of total assets invested?

Oslo asset management as is Tenaris’s biggest shareholder by percentage of total assets invested, with 3.36% of its assets in 95.03K Tenaris shares, valued at 2.91M$.

Who is the top mutual fund holder of Tenaris shares?

GMO Intl Op Value Composite is the top mutual fund holder of Tenaris shares, with 0.53% of its total shares outstanding invested in 2.83M Tenaris shares.

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