DOSSIER · 13F Holders · Q3 2026

CONTANGO ORE INC

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

CUSIP 21077F900·3 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$3M
visible holders
Holders
3
filers reporting
Concentration
76.38%
GROUP ONE TRADING LLC #1
top holder share
AI Holders Summary · Q3 2026

3 institutions reported CONTANGO ORE INC in Q3 2026. GROUP ONE TRADING LLC leads at 76.4% 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
$2M116K0.00%Q3 2026
02
IMC-Chicago, LLC
CIK 0001452861· Market maker
$569K34K0.00%Q3 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$34K9K0.00%Q3 2026