13F Insight
DOSSIER · 13F Holders · Q1 2026Mega-capCrowded

ISHARES TR

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

CUSIP 464287902·13 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 2.9%
vs prior quarter
13F value held
$3.2B
53.0% inst. owned
of float
Holders
13
+14 QoQ
filers reporting
Activity
+8 / −44
+825 added · −886 reduced
this quarter
Concentration
42.41%
Optiver Holding B.V. #1
top holder share
AI Holders Summary · Q1 2026

13 institutions reported ISHARES TR in Q1 2026. Optiver Holding B.V. leads at 42.4% of the visible book. +14 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
$1.4B15.5M0.47%Q1 202602
IMC-Chicago, LLC
CIK 0001452861· Market maker
$899M10.2M0.32%Q1 202603
JPMORGAN CHASE & CO
CIK 0000019617
$718M7.4M0.05%Q1 202604
Skye Global Management LP
CIK 0001675884
$96M1.1M1.93%Q1 202605
HIGHBRIDGE CAPITAL MANAGEMENT LLC
CIK 0000919185
$65M750K2.11%Q1 202606
GROUP ONE TRADING LLC
CIK 0000932540
$60M689K0.11%Q1 202607
HRT FINANCIAL LP
CIK 0001475597
$16M150K0.05%Q4 202508
Marathon Trading Investment Management LLC
CIK 0001572748
$7M80K0.19%Q1 202609
Absolute Gestao de Investimentos Ltda.
CIK 0001622610
$336,21010K0.04%Q1 202610
Northwest & Ethical Investments L.P.
CIK 0002033536
$22,80288K0.00%Q1 202611
SG Americas Securities, LLC
CIK 0001313360
$1,3481.2M0.00%Q1 202612
OSAIC HOLDINGS, INC.
CIK 0001677044
$1,18860.00%Q1 202613
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025