Companies / Terrestrial Energy Inc.
Terrestrial Energy Inc.
Nasdaq: IMSRCIK 2019804CHARLOTTE, NC
Financials · FY2025
Ownership
105.9M shares outstanding · as of Aug 11, 2026
Ownership
| Institutions | 18.59% | 19,689,087 |
| Public float | 81.41% | 86,246,167 |
% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.
Insiders 2
View all →| Insider | % of shares | Shares |
|---|---|---|
Johnson William DDirector | — | — |
Roberto Marco Sella10% owner | — | — |
Institutional holders 88
View all →| Holder | Value | % of shares |
|---|---|---|
| $12.40M | 1.92% | |
| $11.30M | 1.75% | |
| $7.61M | 1.01% | |
| $7.29M | 1.15% | |
| $7.15M | 1.10% | |
| $5.50M | 0.85% | |
| $4.61M | 0.71% | |
| $4.38M | 0.68% | |
| $3.96M | 0.62% | |
| $3.59M | 0.56% |
Activity
Jun 30, 2026View all →
InsidersInstitutions
Who's accumulating and trimming this stock (13F).| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q1 2026 as of | Balyasny Asset Management L.P. 13F manager | Trim | Common Stock | $-7.18M | -1.2M -85.30% | 205,903 0.19% of shares | medium |
| Q1 2026 as of | MMCAP International Inc. SPC 13F manager | Trim | Common Stock | $-4.24M | -706K -94.10% | 44,279 0.04% of shares | low |
| Q1 2026 as of | Cantor Fitzgerald, L. P. 13F manager | Exit | Common Stock | $-3.36M | -550K -100.00% | 0 | low |
| Q4 2025 as of | Cantor Fitzgerald, L. P. 13F manager | New | Common Stock | $3.36M | +550K | 550,000 0.52% of shares | low |
| Q1 2026 as of | Hbk Investments L P 13F manager | Exit | Common Stock | $-3.06M | -500K -100.00% | 0 | low |
| Q4 2025 as of | Galaxy Group Investments LLC 13F manager | New | Common Stock | $3.06M | +500K | 500,000 0.47% of shares | low |
| Q4 2025 as of | Hbk Investments L P 13F manager | New | Common Stock | $3.06M | +500K | 500,000 0.47% of shares | low |
| Q1 2026 as of | Hudson Bay Capital Management LP 13F manager | Trim | Common Stock | $-1.70M | -284K -38.55% | 452,287 0.43% of shares | low |
5%+ ownership events
Schedule 13D / 13G
| Filer | Stance | % of class |
|---|---|---|
| Citadel Advisors LLC | Passive13G/A | — |
| Roberto Marco Sella | Passive13G | — |
Securities
via CUSIP / OpenFIGI
| Symbol | Type | CUSIP |
|---|---|---|
| IMSR | Common Stock | 881454102 |