Terrestrial Energy Inc.
IMSRW- Exchange
- Nasdaq
- Industry
- Fabricated Plate Work (Boiler Shops)
- SEC CIK
- 0002019804
In the last 90 days, Terrestrial Energy Inc. insiders filed 3 open-market purchases and 0 sales; 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 2026
Institutional positions in Terrestrial Energy Inc. as of Jun 30, 2026. 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
Q3 2026 data is still coming in: 4 institutions have reported holding IMSRW so far. See Q3 2026
- Institutional holders
- 24
- −2 vs. Q1 2026
- Shares held
- 11.2M
- +209.4K (+1.9%) vs. Q1 2026
- Total value
- $39.8M
- +$10.1M (+34.2%) vs. Q1 2026
- New holders
- 3
- 4 more added
- Sold out
- 5
- 7 more reduced
Compare with Q1 2026: 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 2026
Shares, value and share of portfolio for each institution holding Terrestrial Energy Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| LMR Partners LLP | 3,246,410 | $11.0M | 0.08% | −101,100−3.0% | Reduced |
| Boothbay Fund Management, LLC | 621,000 | $4.40M | 0.08% | +231,000+59.2% | Added |
| Hudson Bay Capital Management LP | 1,296,174 | $4.38M | 0.02% | −6,876−0.5% | Reduced |
| PEAK6 LLC | 1,236,146 | $4.18M | 0.10% | +50,000+4.2% | Added |
| Cantor Fitzgerald, L. P. | 1,082,851 | $3.53M | 0.07% | −2000.0% | Reduced |
| Caption Management, LLC | 865,372 | $2.92M | 0.10% | 00.0% | Unchanged |
| Aristeia Capital LLC | 840,047 | $2.80M | 0.04% | +104,654+14.2% | Added |
| Magnetar Financial LLC | 723,000 | $2.41M | 0.02% | −57,000−7.3% | Reduced |
| Morgan Stanley | 203,165 | $686.7K | 0.00% | −77,603−27.6% | Reduced |
| Linden Advisors LP | 194,560 | $647.9K | 0.00% | 00.0% | Unchanged |
| Arosa Capital Management LP | 175,000 | $591.5K | 0.52% | 00.0% | Unchanged |
| Yorkville Advisors Global, LP | 152,499 | $515.4K | 0.60% | +152,499 | New |
| Periscope Capital Inc. | 152,500 | $417.9K | 0.07% | 00.0% | Unchanged |
| CastleKnight Management LP | 73,200 | $238.6K | 0.01% | 00.0% | Unchanged |
| Saba Capital Management, L.P. | 65,681 | $218.7K | 0.01% | 00.0% | Unchanged |
| Walleye Capital LLC | 52,616 | $177.8K | 0.00% | −87,370−62.4% | Reduced |
| Wolverine Asset Management LLC | 50,067 | $169.2K | 0.00% | +1,345+2.8% | Added |
| Alberta Investment Management Corp | 50,000 | $169.0K | 0.00% | 00.0% | Unchanged |
| Meteora Capital, LLC | 43,200 | $146.0K | 0.01% | +43,200 | New |
| Virtu Financial LLC | 23,041 | $75.0K | 0.00% | −5,380−18.9% | Reduced |
| Stoic Point Capital Management LLC | 13,402 | $45.3K | 0.04% | 00.0% | Unchanged |
| US Bancorp | 11,655 | $39.4K | 0.00% | +11,655 | New |
| Clear Street Group Inc. | 10,000 | $33.8K | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 6,000 | $20.3K | 0.00% | 00.0% | Unchanged |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −40,743−100.0% | Sold out |
| Advisory Services Network, LLC | 0 | $0 | 0.00% | −6,050−100.0% | Sold out |
| Federation des caisses Desjardins du Quebec | 0 | $0 | 0.00% | −2,000−100.0% | Sold out |
| Advisor Group Holdings, Inc. | 0 | $0 | 0.00% | −600−100.0% | Sold out |
| Clear Street Markets LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |