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, Q2 2025
Institutional positions in Terrestrial Energy Inc. as of Jun 30, 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
- 31
- +1 vs. Q1 2025
- Shares held
- 11.8M
- +324.4K (+2.8%) vs. Q1 2025
- Total value
- $27.6M
- +$19.6M (+243.3%) vs. Q1 2025
- New holders
- 5
- 4 more added
- Sold out
- 4
- 11 more reduced
Compare with Q1 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, Q2 2025
Shares, value and share of portfolio for each institution holding Terrestrial Energy Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Cantor Fitzgerald, L. P. | 2,815,333 | $6.62M | 0.16% | −130,563−4.4% | Reduced |
| LMR Partners LLP | 1,550,073 | $3.64M | 0.06% | +447,165+40.5% | Added |
| CNH Partners LLC | 1,116,928 | $2.50M | 0.06% | 00.0% | Unchanged |
| Magnetar Financial LLC | 980,099 | $2.30M | 0.01% | 00.0% | Unchanged |
| PEAK6 LLC | 575,088 | $1.35M | 0.05% | +575,088 | New |
| Balyasny Asset Management LLC | 575,000 | $1.35M | 0.00% | +515,000+858.3% | Added |
| Picton Mahoney Asset Management | 564,282 | $1.33M | 0.02% | −325,718−36.6% | Reduced |
| Linden Advisors LP | 500,000 | $1.18M | 0.01% | 00.0% | Unchanged |
| MMCAP International Inc. SPC | 490,000 | $1.15M | 0.14% | 00.0% | Unchanged |
| Arosa Capital Management LP | 450,000 | $1.06M | 0.77% | +450,000 | New |
| Morgan Stanley | 283,078 | $665.2K | 0.00% | +283,078 | New |
| Calamos Advisors LLC | 250,000 | $587.5K | 0.00% | 00.0% | Unchanged |
| Whitebox Advisors LLC | 200,000 | $470.0K | 0.01% | 00.0% | Unchanged |
| Rivernorth Capital Management, LLC | 200,000 | $470.0K | 0.03% | 00.0% | Unchanged |
| K2 Principal Fund, L.P. | 177,489 | $417.1K | 0.08% | −205,279−53.6% | Reduced |
| Governors Lane LP | 141,101 | $331.6K | 0.05% | +141,101 | New |
| MYDA Advisors LLC | 139,303 | $327.4K | 0.09% | +139,303 | New |
| CSS LLC | 123,216 | $289.6K | 0.02% | −1,057,882−89.6% | Reduced |
| Gritstone Asset Management LLC | 111,926 | $263.0K | 0.26% | 00.0% | Unchanged |
| Tenor Capital Management Co., L.P. | 87,500 | $205.6K | 0.00% | 00.0% | Unchanged |
| Polar Asset Management Partners Inc. | 80,763 | $189.8K | 0.00% | −19,237−19.2% | Reduced |
| Context Capital Management, LLC | 74,868 | $175.9K | 0.01% | −100,132−57.2% | Reduced |
| Mint Tower Capital Management B.V. | 72,451 | $170.0K | 0.03% | 00.0% | Unchanged |
| Clear Street LLC | 57,656 | $135.5K | 0.00% | +5,489+10.5% | Added |
| Saba Capital Management, L.P. | 48,932 | $115.5K | 0.00% | +38,397+364.5% | Added |
| Periscope Capital Inc. | 32,500 | $76.4K | 0.03% | −146,102−81.8% | Reduced |
| Wolverine Asset Management LLC | 31,055 | $73.0K | 0.00% | −36,675−54.1% | Reduced |
| Bulldog Investors, LLP | 25,000 | $58.8K | 0.01% | −94,400−79.1% | Reduced |
| Fulton Breakefield Broenniman LLC | 18,405 | $43.3K | 0.00% | 00.0% | Unchanged |
| Parallax Volatility Advisers, L.P. | 15,078 | $35.4K | 0.00% | −24,922−62.3% | Reduced |
| Schonfeld Strategic Advisors LLC | 14,997 | $35.2K | 0.00% | −22,503−60.0% | Reduced |
| Highbridge Capital Management LLC | 0 | $0 | 0.00% | – | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −90,000−100.0% | Sold out |
| UBS Group AG | 0 | $0 | 0.00% | −1,829−100.0% | Sold out |
| PenderFund Capital Management Ltd. | 0 | $0 | 0.00% | −15,000−100.0% | Sold out |