Tenaris Ownership | Who Owns Tenaris?

Tenaris Ownership Summary

Tenaris is owned by 3.61% institutional investors, and 96.39% retail investors. Fmr is the largest institutional shareholder, holding 1.59% 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	3.61%	-	96.39%
Sector	Energy Stocks	79.40%	16.36%	4.25%
Industry	Oil & Gas Equipment & Services Stocks	44.26%	15.75%	40.00%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Fmr	8.25M	1.59%	$480.09M
Westwood global investments	6.67M	1.28%	$388.28M
Renaissance	3.20M	0.62%	$186.16M
Van eck associates	2.89M	0.56%	$168.32M
Wellington management group llp	2.41M	0.46%	$139.92M
Price t rowe associates inc /md/	1.45M	0.28%	$84.08M
Encompass capital advisors	1.43M	0.27%	$51.25M
Morgan stanley	1.18M	0.23%	$68.54M
Invesco	1.17M	0.22%	$67.98M
Dimensional fund advisors lp	1.12M	0.22%	$65.22M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Westwood global investments	6.67M	14.47%	$388.28M
Oslo asset management as	95.03K	3.36%	$2.91M
Kiltearn partners llp	204.86K	3.21%	$11.92M
Medina value partners	253.36K	3.09%	$14.74M
Encompass capital advisors	1.43M	1.80%	$51.25M
Mork capital management	28.32K	1.17%	$1.65M
Gallo partners, lp	9.48K	1.06%	$551.72K
Cwa asset management group	506.55K	1.00%	$29.47M
Illumine investment management	17.60K	0.79%	$1.02M
Chesapeake capital corp /il/	17.28K	0.72%	$1.01M

Top Buyers

Holder	Shares	% Assets	Change
Fmr	8.25M	0.03%	6.05M
Driehaus capital management	888.35K	0.38%	888.35K
Van eck associates	2.89M	0.13%	873.85K
Invesco	1.17M	0.01%	622.27K
Optiver b.v.	905.33K	0.01%	589.63K

Top Sellers

Holder	Shares	% Assets	Change
Sourcerock group	-	-	-3.09M
Alua capital management lp	-	-	-2.39M
Holocene advisors, lp	-	-	-1.20M
Capstone investment advisors	-	-	-921.55K
Abc arbitrage sa	-	-	-775.20K

New Positions

Holder	Shares	% Assets	Change	Value
Driehaus capital management	888.35K	0.38%	888.35K	$51.68M
Cwa asset management group	506.55K	1.00%	506.55K	$29.47M
Carrhae capital llp	337.43K	0.59%	337.43K	$19.63M
Qube research	240.92K	0.01%	240.92K	$8.62M
Capital wealth planning	240.51K	0.08%	240.51K	$13.99M

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 %
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%
Mar 31, 2025	231	-4.55%	44,095,821	2.76%	4	28.80%	107	-15.08%	82	7.89%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
GMO Intl Op Value Composite	2.83M	0.53%	2.83M
Fidelity Advisor Focused Em Mkts I	2.35M	0.47%	2.35M
VanEck Oil Services ETF	1.98M	0.39%	-
Vanguard Energy Inv	1.76M	0.35%	21.59K
Vanguard Energy Opportunities Inv	1.76M	0.35%	21.59K
Orbis Global Equity Investor	1.47M	0.27%	-
Fidelity Series Emerging Markets Opps	1.29M	0.26%	-
Strategic Advisers Fidelity Em Mkts	1.10M	0.22%	1.10M
AustralianSuper Balanced Sup	868.28K	0.16%	-21.68K
Orbis SICAV Global Bal Instl Inv	849.74K	0.16%	-

TS Ownership FAQ

Who Owns Tenaris?

Tenaris shareholders are primarily institutional investors at 3.61%, followed by 0% insiders and 0% retail investors. The average institutional ownership in Tenaris's industry, Oil & Gas Equipment & Services Stocks, is 44.26%, which Tenaris falls below.

Who owns the most shares of Tenaris?

Tenaris’s largest shareholders are Fmr (8.25M shares, 1.59%), Westwood global investments (6.67M shares, 1.28%), and Renaissance (3.2M shares, 0.62%). Together, they hold 3.49% 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?

Westwood global investments is Tenaris’s biggest shareholder by percentage of total assets invested, with 14.47% of its assets in 6.67M Tenaris shares, valued at 388.28M$.

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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