DOSSIER · 13F Holders · Q1 2026

RUBRIK INC.

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

CUSIP 781154959·5 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$127M
visible holders
Holders
5
filers reporting
Concentration
70.08%
SG Americas Securities, LLC #1
top holder share
AI Holders Summary · Q1 2026

5 institutions reported RUBRIK INC. in Q1 2026. SG Americas Securities, LLC leads at 70.1% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
SG Americas Securities, LLC
CIK 0001313360
$89M1.2M0.10%Q1 2026
02
IMC-Chicago, LLC
CIK 0001452861· Market maker
$24M301K0.01%Q2 2026
03
GROUP ONE TRADING LLC
CIK 0000932540
$8M96K0.01%Q2 2026
04
SIMPLEX TRADING, LLC
CIK 0001488542
$6M77K0.00%Q2 2026
05
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025