DOSSIER · 13F Holders · Q3 2026

F5 INC

6 institutions still hold F5 INC as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 315616902·6 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$30M
visible holders
Holders
6
filers reporting
Concentration
80.47%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q3 2026

6 institutions reported F5 INC in Q3 2026. IMC-Chicago, LLC leads at 80.5% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
IMC-Chicago, LLC
CIK 0001452861· Market maker
$24M55K0.01%Q3 2026
02
GROUP ONE TRADING LLC
CIK 0000932540
$3M7K0.00%Q3 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$2M5K0.00%Q3 2026
04
HRT FINANCIAL LP
CIK 0001475597
$791K3K0.00%Q4 2025
05
OSAIC HOLDINGS, INC.
CIK 0001677044
$22K10.00%Q2 2026
06
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025