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, Q4 2025
Institutional positions in Terrestrial Energy Inc. as of Dec 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
- 82
- +16 vs. Q3 2025
- Shares held
- 21.4M
- +11.5M (+116.3%) vs. Q3 2025
- Total value
- $130.7M
- −$31.8M (−19.6%) vs. Q3 2025
- New holders
- 50
- 19 more added
- Sold out
- 34
- 9 more reduced
Compare with Q3 2025: 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, Q4 2025
Shares, value and share of portfolio for each institution holding Terrestrial Energy Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| PEAK6 LLC | 0 | $0 | 0.00% | −41,389−100.0% | Sold out |
| MYDA Advisors LLC | 0 | $0 | 0.00% | −30,000−100.0% | Sold out |
| Nations Financial Group Inc, | 0 | $0 | 0.00% | −27,047−100.0% | Sold out |
| Private Advisor Group, LLC | 0 | $0 | 0.00% | −22,841−100.0% | Sold out |
| Tuttle Tactical Management | 0 | $0 | 0.00% | −17,500−100.0% | Sold out |
| EHP Funds Inc. | 0 | $0 | 0.00% | −13,895−100.0% | Sold out |
| Maven Securities LTD | 0 | $0 | 0.00% | −12,200−100.0% | Sold out |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −10,809−100.0% | Sold out |
| BNP Paribas Arbitrage, SA | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| Soltis Investment Advisors LLC | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| North Capital, Inc. | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −576−100.0% | Sold out |
| Larson Financial Group LLC | 0 | $0 | 0.00% | −104−100.0% | Sold out |
| Koesten, Hirschmann & Crabtree, INC. | 0 | $0 | 0.00% | −50−100.0% | Sold out |
| Redwood Park Advisors LLC | 0 | $0 | 0.00% | −44−100.0% | Sold out |
| Wealthspire Advisors, LLC | 0 | $0 | 0.00% | −20−100.0% | Sold out |