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, Q1 2025
Institutional positions in Terrestrial Energy Inc. as of Mar 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
- 30
- +7 vs. Q4 2024
- Shares held
- 11.5M
- +2.66M (+30.1%) vs. Q4 2024
- Total value
- $8.04M
- +$7.28M (+947.5%) vs. Q4 2024
- New holders
- 10
- 4 more added
- Sold out
- 3
- 9 more reduced
Compare with Q4 2024: 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, Q1 2025
Shares, value and share of portfolio for each institution holding Terrestrial Energy Inc.; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| UBS Group AG | 1,829 | $1.26K | 0.00% | +1,829 | New |
| Saba Capital Management, L.P. | 10,535 | $7.22K | 0.00% | +10,535 | New |
| Fulton Breakefield Broenniman LLC | 18,405 | $12.7K | 0.00% | +18,405 | New |
| Schonfeld Strategic Advisors LLC | 37,500 | $25.9K | 0.00% | 00.0% | Unchanged |
| Parallax Volatility Advisers, L.P. | 40,000 | $27.6K | 0.00% | −58,429−59.4% | Reduced |
| Clear Street LLC | 52,167 | $36.0K | 0.00% | +15,225+41.2% | Added |
| Balyasny Asset Management LLC | 60,000 | $41.4K | 0.00% | +60,000 | New |
| Wolverine Asset Management LLC | 67,730 | $46.7K | 0.00% | −36,582−35.1% | Reduced |
| Mint Tower Capital Management B.V. | 72,451 | $50.0K | 0.02% | 00.0% | Unchanged |
| Tenor Capital Management Co., L.P. | 87,500 | $60.4K | 0.00% | 00.0% | Unchanged |
| Verition Fund Management LLC | 90,000 | $62.1K | 0.00% | −12,449−12.2% | Reduced |
| Polar Asset Management Partners Inc. | 100,000 | $69.0K | 0.00% | +100,000 | New |
| Gritstone Asset Management LLC | 111,926 | $77.2K | 0.08% | −384−0.3% | Reduced |
| Bulldog Investors, LLP | 119,400 | $82.4K | 0.02% | −5,600−4.5% | Reduced |
| Context Capital Management, LLC | 175,000 | $120.8K | 0.00% | +98,750+129.5% | Added |
| Periscope Capital Inc. | 178,602 | $123.2K | 0.07% | −119,598−40.1% | Reduced |
| Highbridge Capital Management LLC | – | $138.0K | 0.01% | – | – |
| Rivernorth Capital Management, LLC | 200,000 | $138.0K | 0.01% | 00.0% | Unchanged |
| Whitebox Advisors LLC | 200,000 | $138.0K | 0.00% | +200,000 | New |
| Calamos Advisors LLC | 250,000 | $172.5K | 0.00% | +250,000 | New |
| K2 Principal Fund, L.P. | 382,768 | $264.1K | 0.04% | −1,876−0.5% | Reduced |
| MMCAP International Inc. SPC | 490,000 | $338.1K | 0.06% | +490,000 | New |
| Linden Advisors LP | 500,000 | $342.5K | 0.00% | +500,000 | New |
| Picton Mahoney Asset Management | 890,000 | $613.0K | 0.02% | −100,000−10.1% | Reduced |
| Magnetar Financial LLC | 980,099 | $676.3K | 0.01% | +980,099 | New |
| LMR Partners LLP | 1,102,908 | $761.0K | 0.02% | +352,908+47.1% | Added |
| CNH Partners LLC | 1,116,928 | $770.7K | 0.02% | 00.0% | Unchanged |
| CSS LLC | 1,181,098 | $815.0K | 0.06% | −107,054−8.3% | Reduced |
| Cantor Fitzgerald, L. P. | 2,945,896 | $2.03M | 0.08% | +135,897+4.8% | Added |
| PenderFund Capital Management Ltd. | 15,000 | – | – | 00.0% | Unchanged |
| Shaolin Capital Management LLC | 0 | $0 | 0.00% | −57,499−100.0% | Sold out |
| StoneX Group Inc. | 0 | $0 | 0.00% | −38,837−100.0% | Sold out |
| Heights Capital Management, Inc | 0 | $0 | 0.00% | −18,868−100.0% | Sold out |