Tenaris Ownership | Who Owns Tenaris?

Tenaris Ownership Summary

Tenaris is owned by 5.22% institutional investors, and 94.78% retail investors. Westwood global investments is the largest institutional shareholder, holding 1.42% 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	5.22%	-	94.78%
Sector	Energy Stocks	14085.81%	13.99%	-13999.79%
Industry	Oil & Gas Equipment & Services Stocks	47.70%	12.52%	39.79%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Westwood global investments	8.26M	1.42%	$251.97M
Renaissance	3.35M	0.62%	$119.85M
Fmr	2.30M	0.43%	$82.10M
Wellington management group llp	2.14M	0.40%	$76.40M
Price t rowe associates inc /md/	1.79M	0.33%	$63.94M
Van eck associates	1.61M	0.30%	$57.61M
Encompass capital advisors	1.43M	0.27%	$51.25M
Millennium management	2.82M	0.25%	$106.44M
Morgan stanley	1.17M	0.22%	$41.91M
Dimensional fund advisors lp	1.13M	0.21%	$40.57M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Westwood global investments	8.26M	12.56%	$251.97M
Medina value partners	560.95K	4.69%	$20.07M
Oslo asset management as	95.03K	3.36%	$2.91M
Abc arbitrage sa	775.20K	2.73%	$27.73M
Kiltearn partners llp	298.46K	2.14%	$10.68M
Encompass capital advisors	1.43M	1.80%	$51.25M
Sir capital management	290.10K	0.93%	$10.38M
Clear street markets	86.77K	0.64%	$3.10M
J2 capital management	15.88K	0.43%	$567.88K
Integrated quantitative investments	41.15K	0.42%	$1.47M

Top Buyers

Holder	Shares	% Assets	Change
Millennium management	2.82M	0.05%	778.02K
Optiver b.v.	905.33K	0.01%	589.63K
Renaissance	3.35M	0.16%	459.10K
Abc arbitrage sa	775.20K	2.73%	307.94K
Qube research	240.92K	0.01%	240.92K

Top Sellers

Holder	Shares	% Assets	Change
Sourcerock group	-	-	-3.09M
Alua capital management lp	-	-	-2.39M
Ubs group	269.52K	0.00%	-1.32M
Holocene advisors, lp	-	-	-1.20M
Capstone investment advisors	-	-	-921.55K

New Positions

Holder	Shares	% Assets	Change	Value
Qube research	240.92K	0.01%	240.92K	$8.62M
Norges bank	91.30K	0.00%	91.30K	$2.79M
Highland capital management	49.24K	0.09%	49.24K	$1.76B
Lmr partners llp	42.12K	0.01%	42.12K	$1.51M
Caxton associates lp	18.00K	0.02%	18.00K	$680.22K

Sold Out

Holder	Change
Sachetta	-1.00
Abound wealth management	-6.00
Mendota financial group	-8.00
Clearstead advisors	-13.00
Financial synergies wealth advisors	-15.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Dec 31, 2024	218	5.31%	41,797,351	-17.98%	3	4.37%	117	19.39%	67	-9.46%
Sep 30, 2024	205	-9.29%	50,955,648	-8.46%	9	9.58%	98	-14.78%	74	-6.33%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
GMO Intl Op Value Composite	2.83M	0.53%	2.83M
Vanguard Energy Inv	1.79M	0.34%	-9.21K
Orbis Global Equity Investor	1.47M	0.27%	-
Fidelity Series Emerging Markets Opps	1.37M	0.26%	-
VanEck Oil Services ETF	1.16M	0.22%	-
AustralianSuper Balanced Sup	868.28K	0.16%	-21.68K
Orbis SICAV Global Bal Instl Inv	849.74K	0.16%	-
T. Rowe Price Real Assets Tr I-D	727.79K	0.14%	-
T. Rowe Price Real Assets Tr I-Z	727.79K	0.13%	-24.90K
MFS International Small-Mid Cap Equity	655.29K	0.12%	-11.73K

TS Ownership FAQ

Who Owns Tenaris?

Tenaris shareholders are primarily institutional investors at 5.22%, followed by 0% insiders and 0% retail investors. The average institutional ownership in Tenaris's industry, Oil & Gas Equipment & Services Stocks, is 47.70%, which Tenaris falls below.

Who owns the most shares of Tenaris?

Tenaris’s largest shareholders are Westwood global investments (8.26M shares, 1.42%), Renaissance (3.35M shares, 0.62%), and Fmr (2.3M shares, 0.43%). Together, they hold 2.47% 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 12.56% of its assets in 8.26M Tenaris shares, valued at 251.97M$.

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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