DOSSIER · 13F Holders · Q3 2026

DENISON MINES CORP

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

CUSIP 248356957·5 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$3M
visible holders
Holders
5
filers reporting
Concentration
52.45%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q3 2026

5 institutions reported DENISON MINES CORP in Q3 2026. IMC-Chicago, LLC leads at 52.5% 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
$1M520K0.00%Q3 2026
02
GROUP ONE TRADING LLC
CIK 0000932540
$803K263K0.00%Q2 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$279K108K0.00%Q3 2026
04
CIBC Bancorp USA Inc.
CIK 0001711924
$138K45K0.00%Q2 2026
05
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025