Tenaris Ownership | Who Owns Tenaris?

Tenaris Ownership Summary

Tenaris is owned by 4.09% institutional investors, and 95.91% 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	4.09%	-	95.91%
Sector	Energy Stocks	42.55%	14.74%	42.71%
Industry	Oil & Gas Equipment & Services Stocks	53.28%	12.23%	34.49%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Westwood global investments	8.26M	1.42%	$251.97M
Morgan stanley	1.55M	0.27%	$47.26M
Millennium management	2.82M	0.25%	$106.44M
Fmr	2.73M	0.24%	$103.30M
Renaissance	2.52M	0.22%	$95.19M
Wellington management group llp	2.33M	0.20%	$88.10M
Van eck associates	2.31M	0.20%	$87.33M
Sourcerock group	2.09M	0.18%	$79.12M
Price t rowe associates inc /md/	1.88M	0.16%	$70.87M
Goldman sachs group	1.71M	0.15%	$64.65M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Westwood global investments	8.26M	12.56%	$251.97M
Medina value partners	566.01K	8.77%	$21.39M
Sourcerock group	2.09M	5.62%	$79.12M
Oslo asset management as	95.03K	3.36%	$2.91M
Kiltearn partners llp	292.56K	1.83%	$11.06M
Encompass capital advisors	1.10M	1.56%	$41.57M
Sir capital management	333.28K	1.30%	$12.59M
Merewether investment management, lp	536.41K	0.81%	$20.27M
Capital insight partners	116.51K	0.76%	$4.40M
J2 capital management	13.57K	0.48%	$512.77M

Top Buyers

Holder	Shares	% Assets	Change
Encompass capital advisors	1.10M	1.56%	1.10M
Quadrature capital	963.39K	0.36%	963.39K
Millennium management	2.82M	0.05%	778.02K
Goldman sachs group	1.71M	0.01%	624.85K
Merewether investment management, lp	536.41K	0.81%	536.41K

Top Sellers

Holder	Shares	% Assets	Change
Sir capital management	333.28K	1.30%	-1.10M
Fmr	2.73M	0.01%	-770.06K
Orbis allan gray	1.03M	0.21%	-752.26K
Natixis advisors	-	-	-696.06K
Tt asset management	-	-	-692.60K

New Positions

Holder	Shares	% Assets	Change	Value
Encompass capital advisors	1.10M	1.56%	1.10M	$41.57M
Quadrature capital	963.39K	0.36%	963.39K	$18.16M
Merewether investment management, lp	536.41K	0.81%	536.41K	$20.27M
Capstone investment advisors	282.38K	0.03%	282.38K	$10.67M
Aventail capital group, lp	185.52K	0.36%	185.52K	$7.01M

Sold Out

Holder	Change
Sachetta	-1.00
Abound wealth management	-6.00
Mendota financial group	-8.00
Financial synergies wealth advisors	-15.00
Steward partners investment advisory	-16.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Jun 30, 2024	224	-6.67%	55,655,925	-0.41%	9	10.34%	115	-5.74%	77	-2.53%
Mar 31, 2024	240	7.62%	55,886,745	-10.08%	9	8.66%	122	16.19%	79	-4.82%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
GMO Intl Op Value Composite	2.83M	0.53%	2.83M
Vanguard Energy Inv	1.80M	0.34%	-21.57K
Orbis Global Equity Investor	1.47M	0.27%	-
Fidelity Series Emerging Markets Opps	1.37M	0.26%	-15.30K
VanEck Oil Services ETF	1.34M	0.25%	-50.43K
AustralianSuper Balanced Sup	868.28K	0.16%	-21.68K
Orbis SICAV Global Bal Instl Inv	849.74K	0.16%	-78.09K
T. Rowe Price Real Assets Tr I-D	727.79K	0.14%	-24.90K
T. Rowe Price Real Assets Tr I-Z	727.79K	0.13%	-24.90K
MFS International New Discovery I	667.03K	0.12%	-

TS Ownership FAQ

Who Owns Tenaris?

Tenaris shareholders are primarily institutional investors at 4.09%, followed by 0% insiders and 0% retail investors. The average institutional ownership in Tenaris's industry, Oil & Gas Equipment & Services Stocks, is 53.28%, which Tenaris falls below.

Who owns the most shares of Tenaris?

Tenaris’s largest shareholders are Westwood global investments (8.26M shares, 1.42%), Morgan stanley (1.55M shares, 0.27%), and Millennium management (2.82M shares, 0.25%). Together, they hold 1.94% 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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