Terrestrial Energy Inc.
IMSR- 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; 110 institutions reported holding it in 13F filings for Q2 2026, worth $151.3M in total; no superinvestor holds it.
Other share classesIMSRW
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
- Institutional holders
- 110
- +22 vs. Q1 2026
- Shares held
- 21.5M
- +2.90M (+15.6%) vs. Q1 2026
- Total value
- $151.3M
- +$40.0M (+36.0%) vs. Q1 2026
- New holders
- 38
- 28 more added
- Sold out
- 16
- 22 more reduced
Compare with Q1 2026: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting IMSR 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 | 110 | $151.3M |
| Q1 2026 | 88 | $111.3M |
| Q4 2025 | 82 | $130.7M |
| Q3 2025 | 66 | $162.5M |
| Q2 2025 | 65 | $209.6M |
| Q1 2025 | 45 | $213.4M |
| Q4 2024 | 35 | $162.3M |
| 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 |
|---|---|---|---|---|---|
| Hudson Bay Capital Management LP | 589,293 | $4.17M | 0.02% | +137,006+30.3% | Added |
| D. E. Shaw & Co., Inc. | 667,968 | $4.73M | 0.00% | −546,809−45.0% | Reduced |
| LMR Partners LLP | 690,702 | $4.89M | 0.04% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 693,934 | $4.92M | 0.00% | +34,546+5.2% | Added |
| JPMorgan Chase & Co | 966,797 | $6.78M | 0.00% | −106,276−9.9% | Reduced |
| BlackRock, Inc. | 1,074,524 | $7.61M | 0.00% | −46,361−4.1% | Reduced |
| HRT Financial LP | 1,125,849 | $7.97M | 0.01% | +1,125,849 | New |
| UBS Group AG | 1,772,173 | $12.5M | 0.00% | +1,278,596+259.0% | Added |
| Exchange Traded Concepts, LLC | 2,160,074 | $15.3M | 0.08% | +68,913+3.3% | Added |
| Vanguard Capital Management LLC | 3,414,196 | $24.2M | 0.00% | +2,110,744+161.9% | Added |
| HITE Hedge Asset Management LLC | 0 | $0 | 0.00% | −240,113−100.0% | Sold out |
| K2 Principal Fund, L.P. | 0 | $0 | 0.00% | −80,000−100.0% | Sold out |
| Massar Capital Management, LP | 0 | $0 | 0.00% | −65,000−100.0% | Sold out |
| Diametric Capital, LP | 0 | $0 | 0.00% | −59,191−100.0% | Sold out |
| Bluefin Capital Management, LLC | 0 | $0 | 0.00% | −32,463−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −25,153−100.0% | Sold out |
| Flow Traders U.S. LLC | 0 | $0 | 0.00% | −21,530−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −19,254−100.0% | Sold out |
| Level Four Advisory Services, LLC | 0 | $0 | 0.00% | −16,375−100.0% | Sold out |
| T3 Companies, LLC | 0 | $0 | 0.00% | −16,295−100.0% | Sold out |
| WealthPlan Investment Management, LLC | 0 | $0 | 0.00% | −10,206−100.0% | Sold out |
| DB Fitzpatrick & Co, Inc | 0 | $0 | 0.00% | −150−100.0% | Sold out |
| Tower Research Capital LLC (TRC) | 0 | $0 | 0.00% | −103−100.0% | Sold out |
| Signature Resources Capital Management, LLC | 0 | $0 | 0.00% | −70−100.0% | Sold out |
| Root Financial Partners, LLC | 0 | $0 | 0.00% | −50−100.0% | Sold out |
| CoreCap Advisors, LLC | 0 | $0 | 0.00% | −7−100.0% | Sold out |