Terrestrial Energy Inc. /DE/ - IMSR

Ownership (Schedule 13D / 13G) · latest 50 filings · Back to all files
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Filed Form Reporting person Percent Shares SEC
Feb 17, 2026 SCHEDULE 13G/A Citadel Advisors LLC 1.9% 2,029,208 View
Feb 17, 2026 SCHEDULE 13G/A Citadel Advisors Holdings LP 1.9% 2,029,208 View
Feb 17, 2026 SCHEDULE 13G/A Citadel GP LLC 1.9% 2,029,208 View
Feb 17, 2026 SCHEDULE 13G/A Citadel Securities LLC 0.3% 274,588 View
Feb 17, 2026 SCHEDULE 13G/A Citadel Securities Group LP 0.3% 274,588 View
Feb 17, 2026 SCHEDULE 13G/A Citadel Securities GP LLC 0.3% 274,588 View
Feb 17, 2026 SCHEDULE 13G/A Kenneth Griffin 2.2% 2,303,796 View
Jan 22, 2026 SCHEDULE 13G Roberto Marco Sella 14.34% 15,378,689 View
Jan 22, 2026 SCHEDULE 13G Roberto M. Sella 2012 Family Trust 1.44% 1,538,319 View
Jan 22, 2026 SCHEDULE 13G LL Charitable Foundation 0.62% 653,334 View
Nov 12, 2025 SCHEDULE 13G/A Linden Capital L.P. 0.9% 209,426 View
Nov 12, 2025 SCHEDULE 13G/A Linden GP LLC 0.9% 209,426 View
Nov 12, 2025 SCHEDULE 13G/A Linden Advisors LP 0.9% 209,426 View
Nov 12, 2025 SCHEDULE 13G/A Siu Min Wong 0.9% 209,426 View
Nov 12, 2025 SCHEDULE 13G/A MAGNETAR FINANCIAL LLC 0.62% 142,304 View
Nov 12, 2025 SCHEDULE 13G/A MAGNETAR CAPITAL PARTNERS LP 0.62% 142,304 View
Nov 12, 2025 SCHEDULE 13G/A SUPERNOVA MANAGEMENT LLC 0.62% 142,304 View
Nov 12, 2025 SCHEDULE 13G/A DAVID J. SNYDERMAN 0.62% 142,304 View
Nov 04, 2025 SCHEDULE 13D — 50.0% 105,782,441 View
Nov 04, 2025 SCHEDULE 13D — 50.0% 105,782,441 View
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G. Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F). Amendments (/A) can repeat the same holder over time, so rows should not be summed. Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.