DOSSIER · 13F Holders · Q1 2026

TWENTY ONE CAP INC

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

CUSIP 90138L959·4 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$2M
visible holders
Holders
4
filers reporting
Concentration
62.13%
GROUP ONE TRADING LLC #1
top holder share
AI Holders Summary · Q1 2026

4 institutions reported TWENTY ONE CAP INC in Q1 2026. GROUP ONE TRADING LLC leads at 62.1% 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
$1M183K0.00%Q1 2026
02
SIMPLEX TRADING, LLC
CIK 0001488542
$422K66K0.00%Q1 2026
03
IMC-Chicago, LLC
CIK 0001452861· Market maker
$168K26K0.00%Q1 2026
04
HRT FINANCIAL LP
CIK 0001475597
$123K14K0.00%Q4 2025