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 |
|---|---|---|---|---|---|
| Schonfeld Strategic Advisors LLC | 14,997 | $35.2K | 0.00% | −22,503−60.0% | Reduced |
| Parallax Volatility Advisers, L.P. | 15,078 | $35.4K | 0.00% | −24,922−62.3% | Reduced |
| Fulton Breakefield Broenniman LLC | 18,405 | $43.3K | 0.00% | 00.0% | Unchanged |
| Bulldog Investors, LLP | 25,000 | $58.8K | 0.01% | −94,400−79.1% | Reduced |
| Wolverine Asset Management LLC | 31,055 | $73.0K | 0.00% | −36,675−54.1% | Reduced |
| Periscope Capital Inc. | 32,500 | $76.4K | 0.03% | −146,102−81.8% | Reduced |
| Saba Capital Management, L.P. | 48,932 | $115.5K | 0.00% | +38,397+364.5% | Added |
| Clear Street LLC | 57,656 | $135.5K | 0.00% | +5,489+10.5% | Added |
| Mint Tower Capital Management B.V. | 72,451 | $170.0K | 0.03% | 00.0% | Unchanged |
| Context Capital Management, LLC | 74,868 | $175.9K | 0.01% | −100,132−57.2% | Reduced |
| Polar Asset Management Partners Inc. | 80,763 | $189.8K | 0.00% | −19,237−19.2% | Reduced |
| Tenor Capital Management Co., L.P. | 87,500 | $205.6K | 0.00% | 00.0% | Unchanged |
| Gritstone Asset Management LLC | 111,926 | $263.0K | 0.26% | 00.0% | Unchanged |
| CSS LLC | 123,216 | $289.6K | 0.02% | −1,057,882−89.6% | Reduced |
| MYDA Advisors LLC | 139,303 | $327.4K | 0.09% | +139,303 | New |
| Governors Lane LP | 141,101 | $331.6K | 0.05% | +141,101 | New |
| K2 Principal Fund, L.P. | 177,489 | $417.1K | 0.08% | −205,279−53.6% | Reduced |
| 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 |
| Calamos Advisors LLC | 250,000 | $587.5K | 0.00% | 00.0% | Unchanged |
| Morgan Stanley | 283,078 | $665.2K | 0.00% | +283,078 | New |
| Arosa Capital Management LP | 450,000 | $1.06M | 0.77% | +450,000 | New |
| MMCAP International Inc. SPC | 490,000 | $1.15M | 0.14% | 00.0% | Unchanged |
| Linden Advisors LP | 500,000 | $1.18M | 0.01% | 00.0% | Unchanged |
| Picton Mahoney Asset Management | 564,282 | $1.33M | 0.02% | −325,718−36.6% | Reduced |
| Balyasny Asset Management LLC | 575,000 | $1.35M | 0.00% | +515,000+858.3% | Added |
| PEAK6 LLC | 575,088 | $1.35M | 0.05% | +575,088 | New |
| Magnetar Financial LLC | 980,099 | $2.30M | 0.01% | 00.0% | Unchanged |
| CNH Partners LLC | 1,116,928 | $2.50M | 0.06% | 00.0% | Unchanged |
| LMR Partners LLP | 1,550,073 | $3.64M | 0.06% | +447,165+40.5% | Added |
| Cantor Fitzgerald, L. P. | 2,815,333 | $6.62M | 0.16% | −130,563−4.4% | 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 |