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
13F holders, Q4 2025
Institutional positions in Terrestrial Energy Inc. as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 28
- +4 vs. Q3 2025
- Shares held
- 10.6M
- +1.10M (+11.5%) vs. Q3 2025
- Total value
- $23.1M
- −$34.2M (−59.7%) vs. Q3 2025
- New holders
- 13
- 5 more added
- Sold out
- 9
- 10 more reduced
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting IMSRW on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 24 | $39.8M |
| Q1 2026 | 26 | $29.6M |
| Q4 2025 | 28 | $23.1M |
| Q3 2025 | 24 | $57.3M |
| Q2 2025 | 31 | $27.6M |
| Q1 2025 | 30 | $8.04M |
| Q4 2024 | 23 | $767.9K |
| Q3 2024 | 0 | $0 |
| Q2 2024 | 0 | $0 |
| Q1 2024 | 0 | $0 |
| Q4 2023 | 0 | $0 |
| Q3 2023 | 0 | $0 |
| Q2 2023 | 0 | $0 |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Terrestrial Energy Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Clear Street Markets LLC | 1 | $2 | 0.00% | +1 | New |
| Royal Bank of Canada | 300 | $1.00K | 0.00% | −200−40.0% | Reduced |
| Advisor Group Holdings, Inc. | 600 | $1.27K | 0.00% | +600 | New |
| Clear Street Group Inc. | 10,000 | $21.2K | 0.00% | −20,000−66.7% | Reduced |
| Warberg Asset Management LLC | 11,000 | $23.3K | 0.01% | +11,000 | New |
| Stoic Point Capital Management LLC | 13,402 | $28.4K | 0.02% | +13,402 | New |
| DLD Asset Management, LP | 14,323 | $30.4K | 0.00% | +14,323 | New |
| Alberta Investment Management Corp | 50,000 | $106.0K | 0.00% | +50,000 | New |
| Meteora Capital, LLC | 50,200 | $106.4K | 0.01% | −20,000−28.5% | Reduced |
| Wolverine Asset Management LLC | 71,569 | $151.7K | 0.00% | +71,569 | New |
| MYDA Advisors LLC | 73,179 | $155.1K | 0.04% | −207,821−74.0% | Reduced |
| CastleKnight Management LP | 73,200 | $155.2K | 0.01% | −80,000−52.2% | Reduced |
| Saba Capital Management, L.P. | 75,681 | $160.4K | 0.01% | +26,749+54.7% | Added |
| Jain Global LLC | 90,918 | $192.7K | 0.00% | +90,918 | New |
| Periscope Capital Inc. | 152,500 | $225.7K | 0.04% | +152,500 | New |
| Walleye Capital LLC | 154,680 | $327.9K | 0.00% | +154,680 | New |
| Linden Advisors LP | 194,560 | $413.4K | 0.00% | −255,440−56.8% | Reduced |
| Aristeia Capital LLC | 202,481 | $430.3K | 0.01% | −26,833−11.7% | Reduced |
| Balyasny Asset Management LLC | 213,913 | $453.5K | 0.00% | −446,087−67.6% | Reduced |
| Hudson Bay Capital Management LP | 247,400 | $524.5K | 0.00% | +247,400 | New |
| Arosa Capital Management LP | 275,000 | $583.0K | 0.37% | −175,000−38.9% | Reduced |
| Highbridge Capital Management LLC | – | $646.6K | 0.03% | – | New |
| Morgan Stanley | 342,279 | $725.6K | 0.00% | +59,201+20.9% | Added |
| Caption Management, LLC | 806,543 | $1.71M | 0.08% | +806,543 | New |
| Magnetar Financial LLC | 904,994 | $1.92M | 0.02% | +229,995+34.1% | Added |
| PEAK6 LLC | 1,186,146 | $2.51M | 0.07% | +16,934+1.4% | Added |
| Cantor Fitzgerald, L. P. | 2,575,000 | $5.46M | 0.16% | −149,172−5.5% | Reduced |
| LMR Partners LLP | 2,850,610 | $6.04M | 0.06% | +1,247,637+77.8% | Added |
| CNH Partners LLC | 0 | $0 | 0.00% | −241,236−100.0% | Sold out |
| Whitebox Advisors LLC | 0 | $0 | 0.00% | −200,000−100.0% | Sold out |
| BNP Paribas Arbitrage, SA | 0 | $0 | 0.00% | −99,332−100.0% | Sold out |
| Picton Mahoney Asset Management | 0 | $0 | 0.00% | −59,282−100.0% | Sold out |
| Rivernorth Capital Management, LLC | 0 | $0 | 0.00% | −49,700−100.0% | Sold out |
| Mint Tower Capital Management B.V. | 0 | $0 | 0.00% | −33,505−100.0% | Sold out |
| Boothbay Fund Management, LLC | 0 | $0 | 0.00% | −11,476−100.0% | Sold out |
| Fulton Breakefield Broenniman LLC | 0 | $0 | 0.00% | −18,405−100.0% | Sold out |
| Bank of America Corp | 0 | $0 | 0.00% | −308−100.0% | Sold out |