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 2026
Institutional positions in Terrestrial Energy Inc. as of Mar 31, 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
- 26
- −2 vs. Q4 2025
- Shares held
- 11.0M
- +337.7K (+3.2%) vs. Q4 2025
- Total value
- $29.6M
- +$6.54M (+28.3%) vs. Q4 2025
- New holders
- 5
- 4 more added
- Sold out
- 7
- 8 more reduced
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Terrestrial Energy Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Clear Street Markets LLC | 1 | $3 | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 600 | $1.55K | 0.00% | 00.0% | Unchanged |
| Federation des caisses Desjardins du Quebec | 2,000 | $5.18K | 0.00% | +2,000 | New |
| Rockefeller Capital Management L.P. | 6,000 | $15.5K | 0.00% | +6,000 | New |
| Advisory Services Network, LLC | 6,050 | $15.7K | 0.00% | +6,050 | New |
| Clear Street Group Inc. | 10,000 | $25.9K | 0.00% | 00.0% | Unchanged |
| Stoic Point Capital Management LLC | 13,402 | $34.7K | 0.03% | 00.0% | Unchanged |
| Virtu Financial LLC | 28,421 | $74.0K | 0.00% | +28,421 | New |
| Balyasny Asset Management LLC | 40,743 | $104.9K | 0.00% | −173,170−81.0% | Reduced |
| Wolverine Asset Management LLC | 48,722 | $126.2K | 0.00% | −22,847−31.9% | Reduced |
| Alberta Investment Management Corp | 50,000 | $129.5K | 0.00% | 00.0% | Unchanged |
| Saba Capital Management, L.P. | 65,681 | $170.1K | 0.01% | −10,000−13.2% | Reduced |
| CastleKnight Management LP | 73,200 | $189.6K | 0.01% | 00.0% | Unchanged |
| Periscope Capital Inc. | 152,500 | $292.8K | 0.05% | 00.0% | Unchanged |
| Walleye Capital LLC | 139,986 | $362.6K | 0.00% | −14,694−9.5% | Reduced |
| Arosa Capital Management LP | 175,000 | $453.3K | 0.30% | −100,000−36.4% | Reduced |
| Linden Advisors LP | 194,560 | $500.0K | 0.00% | 00.0% | Unchanged |
| Morgan Stanley | 280,768 | $727.2K | 0.00% | −61,511−18.0% | Reduced |
| Aristeia Capital LLC | 735,393 | $1.89M | 0.04% | +532,912+263.2% | Added |
| Magnetar Financial LLC | 780,000 | $2.02M | 0.02% | −124,994−13.8% | Reduced |
| Caption Management, LLC | 865,372 | $2.24M | 0.11% | +58,829+7.3% | Added |
| Boothbay Fund Management, LLC | 390,000 | $2.34M | 0.06% | +390,000 | New |
| Cantor Fitzgerald, L. P. | 1,083,051 | $2.81M | 0.10% | −1,491,949−57.9% | Reduced |
| PEAK6 LLC | 1,186,146 | $3.07M | 0.09% | 00.0% | Unchanged |
| Hudson Bay Capital Management LP | 1,303,050 | $3.37M | 0.02% | +1,055,650+426.7% | Added |
| LMR Partners LLP | 3,347,510 | $8.67M | 0.08% | +496,900+17.4% | Added |
| Highbridge Capital Management LLC | 0 | $0 | 0.00% | – | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −90,918−100.0% | Sold out |
| MYDA Advisors LLC | 0 | $0 | 0.00% | −73,179−100.0% | Sold out |
| Meteora Capital, LLC | 0 | $0 | 0.00% | −50,200−100.0% | Sold out |
| DLD Asset Management, LP | 0 | $0 | 0.00% | −14,323−100.0% | Sold out |
| Warberg Asset Management LLC | 0 | $0 | 0.00% | −11,000−100.0% | Sold out |
| Royal Bank of Canada | 0 | $0 | 0.00% | −300−100.0% | Sold out |