Tenaris Ownership | Who Owns Tenaris?

Tenaris Ownership Summary

Tenaris is owned by 4.04% institutional investors, and 95.96% retail investors. Westwood global investments is the largest institutional shareholder, holding 1.35% 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	4.04%	-	95.96%
Sector	Energy Stocks	147.73%	15.16%	-62.89%
Industry	Oil & Gas Equipment & Services Stocks	41.12%	12.83%	46.05%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Westwood global investments	7.27M	1.35%	$279.62M
Renaissance	2.96M	0.55%	$113.98M
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
Dimensional fund advisors lp	1.23M	0.23%	$47.48M
Morgan stanley	1.17M	0.22%	$44.97M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Westwood global investments	7.27M	14.22%	$279.62M
Medina value partners	560.95K	4.69%	$20.07M
Oslo asset management as	95.03K	3.36%	$2.91M
Kiltearn partners llp	298.46K	2.14%	$10.68M
Encompass capital advisors	1.43M	1.80%	$51.25M
Clear street markets	86.77K	0.64%	$3.10M
Chesapeake capital corp /il/	16.29K	0.52%	$626.24K
J2 capital management	15.70K	0.44%	$603.59K
Cadence wealth management	22.01K	0.41%	$846.36K
Corient ia	15.00K	0.40%	$536.55K

Top Buyers

Holder	Shares	% Assets	Change
Millennium management	2.82M	0.05%	778.02K
Optiver b.v.	905.33K	0.01%	589.63K
Qube research	240.92K	0.01%	240.92K
Tower research capital llc (trc)	228.75K	0.23%	222.85K
Goldman sachs group	819.58K	0.00%	114.39K

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
Qube research	240.92K	0.01%	240.92K	$8.62M
Norges bank	91.30K	0.00%	91.30K	$2.79M
Lmr partners llp	42.12K	0.01%	42.12K	$1.51M
Envestnet asset management	28.66K	0.00%	28.66K	$1.10M
Beck bode	19.30K	0.12%	19.30K	$742.05K

Sold Out

Holder	Change
Sachetta	-1.00
Palisade asset management	-5.00
Abound wealth management	-6.00
Mendota financial group	-8.00
Clearstead advisors	-13.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Dec 31, 2024	218	5.31%	41,797,351	-17.98%	3	4.37%	117	19.39%	67	-9.46%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
GMO Intl Op Value Composite	2.83M	0.53%	2.83M
VanEck Oil Services ETF	2.40M	0.47%	37.22K
Vanguard Energy Inv	1.74M	0.35%	-26.18K
Orbis Global Equity Investor	1.47M	0.27%	-
Fidelity Series Emerging Markets Opps	1.29M	0.26%	-76.40K
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	769.54K	0.15%	-50.54K
T. Rowe Price Real Assets Tr I-Z	727.79K	0.13%	-24.90K
MFS International New Discovery I	611.92K	0.12%	611.92K

TS Ownership FAQ

Who Owns Tenaris?

Tenaris shareholders are primarily institutional investors at 4.04%, followed by 0% insiders and 0% retail investors. The average institutional ownership in Tenaris's industry, Oil & Gas Equipment & Services Stocks, is 41.12%, which Tenaris falls below.

Who owns the most shares of Tenaris?

Tenaris’s largest shareholders are Westwood global investments (7.27M shares, 1.35%), Renaissance (2.96M shares, 0.55%), and Fmr (2.3M shares, 0.43%). Together, they hold 2.33% 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 14.22% of its assets in 7.27M Tenaris shares, valued at 279.62M$.

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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