TERRESTRIAL ENERGY INC

Historical 13F Holders

Symbol
IMSR
CUSIP
881454102
All holders as of
Q2 2026
Type
Equity
Class
COM SHS
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Each filer's latest filing for 881454102 since 12/18/2024, largest first.

Filer % of Class Filed
Roberto Marco Sella 13G
14.3% 1/22/2026
Event 10/29/2025
Simon Irish 13D 12.8% 11/4/2025
Event 10/28/2025
LeBlanc David Michael 13D 9.7% 11/4/2025
Event 10/28/2025
Under 5%, checked the "5 percent or less" box, or amended by a later filing (3)
Citadel Advisors LLC 13G/A
2.2% 2/17/2026
Event 12/31/2025
Linden Capital L.P. 13G/A
0.9% 11/12/2025
Event 9/30/2025
Magnetar Financial LLC 13G/A
0.6% 11/12/2025
Event 9/30/2025

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 2 15.4 k $59.9 k
2026 Q2 122 21.8 M $183 M
2026 Q1 97 18.6 M $111 M
2025 Q4 103 21.4 M $131 M