13F Insight
DOSSIER · 13F Holders · Q1 2026BellwetherCompounder

ISHARES TR

27 institutions still hold ISHARES TR as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 464287955·27 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 5.9%
vs prior quarter
13F value held
$20.5B
58.0% inst. owned
of float
Holders
27
+48 QoQ
filers reporting
Activity
+8 / −98
+870 added · −895 reduced
this quarter
Concentration
56.79%
Optiver Holding B.V. #1
top holder share
AI Holders Summary · Q1 2026

27 institutions reported ISHARES TR in Q1 2026. Optiver Holding B.V. leads at 56.8% of the visible book. +48 net new institutions vs prior quarter — accumulation reading.

Top holders

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

#HolderValueShares% port.Quarter
01
Optiver Holding B.V.
CIK 0001859606· Market maker
$11.6B48.4M4.02%Q1 202602
JPMORGAN CHASE & CO
CIK 0000019617
$4.0B18.9M0.25%Q1 202603
IMC-Chicago, LLC
CIK 0001452861· Market maker
$2.9B12.9M1.05%Q1 202604
AKUNA SECURITIES LLC
CIK 0001529090
$1.3B5.2M2.92%Q1 202605
HIGHBRIDGE CAPITAL MANAGEMENT LLC
CIK 0000919185
$187M780K6.06%Q1 202606
Cartenna Capital, LP
CIK 0001808928
$124M500K4.52%Q1 202607
GROUP ONE TRADING LLC
CIK 0000932540
$104M1.2M0.20%Q1 202608
Cruiser Capital Advisors, LLC
CIK 0001713506
$93M4K35.95%Q1 202609
RIPOSTE CAPITAL LLC
CIK 0001672355
$42M150K10.63%Q1 202610
Garda Capital Partners LP
CIK 0001666905
$36M145K9.35%Q1 202611
Maven Securities LTD
CIK 0001633046
$32M129K0.61%Q1 202612
1832 Asset Management L.P.
CIK 0000944388
$25M101K0.02%Q1 202613
All Terrain Financial Advisors, LLC
CIK 0001731358
$24M110K5.56%Q1 202614
OnyxPoint Global Management LP
CIK 0001961491
$17M67K3.91%Q1 202615
SABBY MANAGEMENT, LLC
CIK 0001535610
$7M30016.51%Q1 202616
Ancora Advisors LLC
CIK 0001446114
$4M2K0.08%Q4 202517
Swan Global Investments, LLC
CIK 0001591505
$2M10K0.06%Q1 202618
LuminArx Capital Management LP
CIK 0001992915
$1M395K0.77%Q1 202619
MACROVIEW INVESTMENT MANAGEMENT LLC
CIK 0001551727
$793,0003K0.55%Q1 202620
Alaethes Wealth, LLC
CIK 0001859677
$620,0003K0.18%Q1 2026
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