Terrestrial Energy Inc.
IMSRW- Exchange
- Nasdaq
- Industry
- Fabricated Plate Work (Boiler Shops)
- SEC CIK
- 0002019804
No open-market purchases or sales by Terrestrial Energy Inc. insiders were filed in the last 90 days; 24 institutions reported holding it in 13F filings for Q2 2026, worth $39.8M in total; no superinvestor holds it.
Other share classesIMSR
Q3 2025 vs. Q2 2025
How the institutions holding Terrestrial Energy Inc. changed between Q2 2025 and Q3 2025.
All holders in Q3 2025All holders in Q2 2025
| Measure | Q2 2025 | Of which not filed for Q3 2025 | Q3 2025 | Change |
|---|---|---|---|---|
| Holders | 31 | 1 | 24 | −6 |
| Shares | 11.8M | 57.7K | 9.54M | −2.20M (−18.8%) |
| Value | $27.6M | $135.5K | $57.3M | +$29.9M (+108.7%) |
1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so the changes leave them out.
New holders (8)
Institutions that held Terrestrial Energy Inc. at the end of Q3 2025 but not at the end of Q2 2025.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| Aristeia Capital LLC | 229,314 | $1.38M | 0.04% |
| CastleKnight Management LP | 153,200 | $928.4K | 0.05% |
| BNP Paribas Arbitrage, SA | 99,332 | $596.0K | 0.00% |
| Meteora Capital, LLC | 70,200 | $421.2K | 0.04% |
| Boothbay Fund Management, LLC | 11,476 | $188.3K | 0.00% |
| Clear Street Group Inc. | 30,000 | $180.0K | 0.00% |
| Royal Bank of Canada | 500 | $3.00K | 0.00% |
| Bank of America Corp | 308 | $1.85K | 0.00% |
Sold out (14)
Institutions that held Terrestrial Energy Inc. at the end of Q2 2025 and filed for Q3 2025 without it.
| Institution | Shares, Q2 2025 | Value, Q2 2025 |
|---|---|---|
| MMCAP International Inc. SPC | 490,000 | $1.15M |
| Calamos Advisors LLC | 250,000 | $587.5K |
| K2 Principal Fund, L.P. | 177,489 | $417.1K |
| Governors Lane LP | 141,101 | $331.6K |
| CSS LLC | 123,216 | $289.6K |
| Gritstone Asset Management LLC | 111,926 | $263.0K |
| Tenor Capital Management Co., L.P. | 87,500 | $205.6K |
| Polar Asset Management Partners Inc. | 80,763 | $189.8K |
| Context Capital Management, LLC | 74,868 | $175.9K |
| Periscope Capital Inc. | 32,500 | $76.4K |
| Wolverine Asset Management LLC | 31,055 | $73.0K |
| Bulldog Investors, LLP | 25,000 | $58.8K |
| Parallax Volatility Advisers, L.P. | 15,078 | $35.4K |
| Schonfeld Strategic Advisors LLC | 14,997 | $35.2K |
Not filed for Q3 2025 yet (1)
Institutions that held Terrestrial Energy Inc. at the end of Q2 2025 and haven't filed a 13F for Q3 2025. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q2 2025 | Value, Q2 2025 |
|---|---|---|
| Clear Street LLC | 57,656 | $135.5K |