DOSSIER · 13F Holders · Q1 2026

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 464287905·13 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$10.4B
visible holders
Holders
13
filers reporting
Concentration
64.80%
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 64.8% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
Optiver Holding B.V.
CIK 0001859606· Market maker
$6.7B27.9M2.32%Q1 2026
02
IMC-Chicago, LLC
CIK 0001452861· Market maker
$1.4B7.2M0.51%Q1 2026
03
JPMORGAN CHASE & CO
CIK 0000019617
$905M5.3M0.06%Q1 2026
04
AKUNA SECURITIES LLC
CIK 0001529090
$736M3.0M1.67%Q1 2026
05
Maven Securities LTD
CIK 0001633046
$211M898K4.06%Q1 2026
06
Bracebridge Capital, LLC
CIK 0001426486
$207M8K5.56%Q1 2026
07
GROUP ONE TRADING LLC
CIK 0000932540
$103M1.2M0.20%Q1 2026
08
HIGHBRIDGE CAPITAL MANAGEMENT LLC
CIK 0000919185
$31M400K1.01%Q1 2026
09
SG Americas Securities, LLC
CIK 0001313360
$25M3.1M0.03%Q1 2026
10
HRT FINANCIAL LP
CIK 0001475597
$15M159K0.05%Q4 2025
11
Northstar Advisory Group, LLC
CIK 0001816000
$751K3K0.23%Q2 2026
12
OSAIC HOLDINGS, INC.
CIK 0001677044
$20K280.00%Q1 2026
13
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025