13F Insight
DOSSIER · 13F Holders · Q2 2026Basic Materials · Steel Works, Blast Furnaces & Rolling Mills (Coke Ovens)
TS

TENARIS S A

294 institutions still hold TENARIS S A as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 88031M109·Steel Works, Blast Furnaces & Rolling Mills (Coke Ovens)·294 13F holders·last filed Jun 30, 2026
Market cap
—
13F value held
$1.6B
visible holders
Holders
294
filers reporting
Concentration
23.67%
FMR LLC #1
top holder share
AI Holders Summary · Q2 2026

294 institutions reported TS in Q2 2026. FMR LLC leads at 23.7% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
FMR LLC
CIK 0000315066
$375M6.8M0.02%Q2 202602
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$170M3.1M0.23%Q2 202603
VAN ECK ASSOCIATES CORP
CIK 0000869178
$138M2.5M0.08%Q2 202604
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$136M2.5M0.02%Q2 202605
PRICE T ROWE ASSOCIATES INC /MD/
CIK 0000080255
$84M1.4M0.01%Q1 202606
MORGAN STANLEY
CIK 0000895421
$69M1.2M0.00%Q2 202607
GOLDMAN SACHS GROUP INC
CIK 0000886982
$65M1.2M0.01%Q2 202608
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$58M1.0M0.01%Q2 202609
Holocene Advisors, LP
CIK 0001700574
$57M1.0M0.13%Q2 202610
DRIEHAUS CAPITAL MANAGEMENT LLC
CIK 0000938206
$56M1.0M0.32%Q2 202611
CWA Asset Management Group, LLC
CIK 0001667134
$55M987K1.67%Q2 202612
Invesco Ltd.
CIK 0000914208
$50M902K0.00%Q2 202613
BlackRock, Inc.
CIK 0002012383
$41M748K0.00%Q2 202614
MARSHALL WACE, LLP
CIK 0001318757
$39M704K0.03%Q2 202615
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
CIK 0000912938
$35M628K0.01%Q2 202616
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$34M620K0.01%Q2 202617
UBS Group AG
CIK 0001610520
$32M582K0.00%Q2 202618
Bridgewater Associates, LP
CIK 0001350694
$32M568K0.13%Q2 202619
ASSETMARK, INC
CIK 0001344551
$31M561K0.05%Q2 202620
Freestone Grove Partners LP
CIK 0002007591
$28M504K0.18%Q2 2026
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