Roberto Sella - 29 Oct 2025 SCHEDULE 13G Report for Terrestrial Energy Inc. Common Stock, par value $0.0001 per share (IMSR)

Filing Manager
Roberto Sella
Reporting Manager
Roberto Marco Sella
Security
Terrestrial Energy Inc. Common Stock, par value $0.0001 per share
Symbol
IMSR
Shares outstanding
107,243,298 shares
Disclosed Ownership
15,378,689 shares
Ownership
14%
Form type
SCHEDULE 13G
Filing time
22 Jan 2026, 17:16:01 UTC
Date of event
29 Oct 2025
SEC
View on sec.gov

Reporting Managers (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Roberto Marco Sella 14% 15,378,689 719,433 14,659,256 /s/ Roberto Sella Roberto Sella
Roberto M. Sella 2012 Family Trust 1.4% 1,538,319 0 1,538,319 /s/ Roberto Sella Roberto Sella, as Authorized Party
LL Charitable Foundation 0.62% 653,334 0 653,334 /s/ Roberto Sella Roberto Sella, its President and Director