DOSSIER · 13F Holders · Q1 2026

ISHARES TR

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

CUSIP 464287907·4 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$3.9B
visible holders
Holders
4
filers reporting
Concentration
99.87%
SIMPLEX TRADING, LLC #1
top holder share
AI Holders Summary · Q1 2026

4 institutions reported ISHARES TR in Q1 2026. SIMPLEX TRADING, LLC leads at 99.9% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
SIMPLEX TRADING, LLC
CIK 0001488542
$3.9B33.4M2.60%Q1 2026
02
IMC-Chicago, LLC
CIK 0001452861· Market maker
$5M68K0.00%Q1 2026
03
GROUP ONE TRADING LLC
CIK 0000932540
$206K3K0.00%Q1 2026
04
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025