DOSSIER · 13F Holders · Q2 2026

TERRESTRIAL ENERGY INC

4 institutions still hold TERRESTRIAL ENERGY INC as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 881454902·4 13F holders·last filed Jun 30, 2026
Market cap
—
13F value held
$11M
visible holders
Holders
4
filers reporting
Concentration
52.29%
GROUP ONE TRADING LLC #1
top holder share
AI Holders Summary · Q2 2026

4 institutions reported TERRESTRIAL ENERGY INC in Q2 2026. GROUP ONE TRADING LLC leads at 52.3% 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
$6M785K0.01%Q2 2026
02
SIMPLEX TRADING, LLC
CIK 0001488542
$2M292K0.00%Q2 2026
03
IMC-Chicago, LLC
CIK 0001452861· Market maker
$2M273K0.00%Q2 2026
04
HRT FINANCIAL LP
CIK 0001475597
$1M175K0.00%Q4 2025