DOSSIER · 13F Holders · Q2 2026

RUBRIK INC.

7 institutions still hold RUBRIK INC. as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 781154909·7 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$117M
visible holders
Holders
7
filers reporting
Concentration
60.47%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q2 2026

7 institutions reported RUBRIK INC. in Q2 2026. IMC-Chicago, LLC leads at 60.5% 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
$71M885K0.02%Q2 2026
02
SG Americas Securities, LLC
CIK 0001313360
$19M1.2M0.02%Q1 2026
03
GROUP ONE TRADING LLC
CIK 0000932540
$14M179K0.02%Q2 2026
04
SIMPLEX TRADING, LLC
CIK 0001488542
$10M127K0.01%Q2 2026
05
HRT FINANCIAL LP
CIK 0001475597
$3M39K0.01%Q4 2025
06
OSAIC HOLDINGS, INC.
CIK 0001677044
$3K20.00%Q1 2026
07
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025