DOSSIER · 13F Holders · Q2 2026

VANGUARD INDEX FDS

5 institutions still hold VANGUARD INDEX FDS as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 922908909·5 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$158M
visible holders
Holders
5
filers reporting
Concentration
57.66%
SIMPLEX TRADING, LLC #1
top holder share
AI Holders Summary · Q2 2026

5 institutions reported VANGUARD INDEX FDS in Q2 2026. SIMPLEX TRADING, LLC leads at 57.7% 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
$91M261K0.05%Q2 2026
02
IMC-Chicago, LLC
CIK 0001452861· Market maker
$65M196K0.02%Q2 2026
03
HRT FINANCIAL LP
CIK 0001475597
$1M4K0.00%Q4 2025
04
GROUP ONE TRADING LLC
CIK 0000932540
$370K1K0.00%Q2 2026
05
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025