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 2024
Institutional positions in Terrestrial Energy Inc. as of Dec 31, 2024. 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
- 35
- +35 vs. Q3 2024
- Shares held
- 16.2M
- +16.2M vs. Q3 2024
- Total value
- $162.3M
- +$162.3M vs. Q3 2024
- New holders
- 35
- 0 more added
- Sold out
- 0
- 0 more reduced
Compare with Q3 2024: 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 2024
Shares, value and share of portfolio for each institution holding Terrestrial Energy Inc.; share changes are against Q3 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vivaldi Asset Management, LLC | 2,069,998 | $20.7M | 1.58% | +2,069,998 | New |
| Picton Mahoney Asset Management | 1,980,000 | $19.8M | 0.75% | +1,980,000 | New |
| CNH Partners LLC | 1,563,833 | $15.7M | 0.37% | +1,563,833 | New |
| LMR Partners LLP | 1,500,000 | $15.0M | 0.26% | +1,500,000 | New |
| Karpus Management, Inc. | 1,293,947 | $13.0M | 0.38% | +1,293,947 | New |
| D. E. Shaw & Co., Inc. | 920,000 | $9.22M | 0.01% | +920,000 | New |
| Wolverine Asset Management LLC | 765,994 | $7.68M | 0.14% | +765,994 | New |
| Westchester Capital Management, LLC | 670,481 | $6.72M | 0.39% | +670,481 | New |
| Goldman Sachs Group Inc | 640,024 | $6.41M | 0.00% | +640,024 | New |
| Highbridge Capital Management LLC | 500,000 | $5.01M | 0.19% | +500,000 | New |
| Two Sigma Investments, LP | 500,000 | $5.01M | 0.01% | +500,000 | New |
| Millennium Management LLC | 450,000 | $4.51M | 0.00% | +450,000 | New |
| Whitebox Advisors LLC | 400,000 | $4.01M | 0.15% | +400,000 | New |
| Rivernorth Capital Management, LLC | 400,000 | $4.01M | 0.19% | +400,000 | New |
| Bulldog Investors, LLP | 349,898 | $3.51M | 0.92% | +349,898 | New |
| Berkley W R Corp | 297,240 | $2.98M | 0.17% | +297,240 | New |
| Gritstone Asset Management LLC | 224,618 | $2.25M | 2.38% | +224,618 | New |
| Verition Fund Management LLC | 203,412 | $2.04M | 0.01% | +203,412 | New |
| Periscope Capital Inc. | 200,000 | $2.00M | 1.42% | +200,000 | New |
| Centiva Capital, LP | 195,221 | $1.96M | 0.07% | +195,221 | New |
| Tenor Capital Management Co., L.P. | 175,000 | $1.74M | 0.02% | +175,000 | New |
| Deltec Asset Management LLC | 150,000 | $1.50M | 0.30% | +150,000 | New |
| Virtu Financial LLC | 146,019 | $1.46M | 0.08% | +146,019 | New |
| Mint Tower Capital Management B.V. | 144,903 | $1.45M | 0.38% | +144,903 | New |
| Dakota Wealth Management | 103,450 | $1.04M | 0.02% | +103,450 | New |
| Heights Capital Management, Inc | 80,000 | $801.6K | 0.40% | +80,000 | New |
| Schonfeld Strategic Advisors LLC | 75,000 | $751.5K | 0.00% | +75,000 | New |
| PenderFund Capital Management Ltd. | 30,000 | $432.1K | 0.09% | +30,000 | New |
| Tuttle Tactical Management | 35,000 | $350.7K | 1.80% | +35,000 | New |
| Toronto Dominion Bank | 31,687 | $317.5K | 0.00% | +31,687 | New |
| Kepos Capital LP | 30,000 | $301.0K | 0.26% | +30,000 | New |
| Fir Tree Capital Management LP | 20,519 | $205.6K | 0.48% | +20,519 | New |
| UBS Group AG | 16,620 | $166.5K | 0.00% | +16,620 | New |
| Radcliffe Capital Management, L.P. | 13,400 | $134.3K | 0.02% | +13,400 | New |
| Clear Street LLC | 7,364 | $73.8K | 0.00% | +7,364 | New |