$TS

$60.32 +$1.01 (1.7%) Close

$TS Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 1.07B shares outstanding

Who owns TS?

By type of holder

Institutions 3.6% Everyone else 96.4%

No insider has reported a holding in the last two years, so insiders are counted in "Everyone else".

Concentration Top 10 holders own 66.5%

San Faustin S.A. 64.6% · FMR LLC 0.6%

Institutional ownership

3.6%

-0.1 pts vs last qtr

Institutional holders

284

+19 vs last qtr

Net shares bought

−966.2K

by institutions in Q2 2026

New / sold out

54 / 35

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Merewether Investment Management, LP NEW +1.1M
Holocene Advisors, LP NEW +1.0M

Biggest sellers in Q2 2026

Westwood Global Investments, LLC SOLD OUT −6.7M
FMR LLC −1.5M

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Tenaris SA in the last 12 months.

Is your stake being diluted?

There are not yet two fiscal years of reported share counts for Tenaris SA.

How patient are the owners?

Institutional shares by how long they've been held

5+ years61% 3–5 years5% 1–3 years7% Under 1 year26%

Quarterly turnover

24.9%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting TS on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
F FMR LLC	6.8M	0.63%	−1.5M (−18.1%)	≤2021	0.0%
Shares held by quarter Peak holding8.3M (Q1'26) Change over 8 quarters+3.3M Share of the company0.630% FMR LLC's full portfolio →
WG Westwood Global Investments, LLC	—	—	SOLD OUT	—	0.0%
Shares held by quarter Peak holding8.2M (Q3'24) Change over 8 quarters−8.2M Westwood Global Investments, LLC's full portfolio →

FMR LLC

6.8M

% of company

0.63%

Change vs last qtr

−1.5M (−18.1%)

Held since

≤2021

Westwood Global Investments, LLC

—

% of company

—

Change vs last qtr

SOLD OUT

Held since

—

28 more super investors behind a free account

See every manager holding Tenaris SA, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting TS on Form N-PORT; together they hold 1.0% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
FA Fidelity Advisor Focused Emerging Markets Fund Fidelity Advisor Series VIII	$110M	1.9M	0.18%	0.84%	July 31, 2026
VO VanEck Oil Services ETF VanEck ETF Trust	$102M	1.8M	0.17%	5.12%	June 30, 2026

Fidelity Advisor Focused Emerging Markets Fund

Fidelity Advisor Series VIII

Position value

$110M

% of company

0.18%

% of the fund

0.84%

As of

July 31, 2026

VanEck Oil Services ETF

VanEck ETF Trust

Position value

$102M

% of company

0.17%

% of the fund

5.12%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Tenaris SA and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
SF San Faustin S.A. 5%+ holder 13D · 68.6%	692.1M	64.56%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company64.560% Disclosed stake13D · 68.6% View the 13D/G filing →

San Faustin S.A.

5%+ holder13D · 68.6%

692.1M

% of company

64.56%

Change vs last qtr

—

Held since

—

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