DOSSIER · 13F Holders · Q3 2026

RACKSPACE TECHNOLOGY INC

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

CUSIP 750102955·5 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$4M
visible holders
Holders
5
filers reporting
Concentration
59.54%
GROUP ONE TRADING LLC #1
top holder share
AI Holders Summary · Q3 2026

5 institutions reported RACKSPACE TECHNOLOGY INC in Q3 2026. GROUP ONE TRADING LLC leads at 59.5% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
GROUP ONE TRADING LLC
CIK 0000932540
$2M595K0.00%Q3 2026
02
IMC-Chicago, LLC
CIK 0001452861· Market maker
$735K197K0.00%Q3 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$678K182K0.00%Q3 2026
04
JPMORGAN CHASE & CO
CIK 0000019617
$93K24K0.00%Q3 2026
05
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025