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 |
|---|---|---|---|---|---|
| Vanguard Capital Management LLC | 3,414,196 | $24.2M | 0.00% | +2,110,744+161.9% | Added |
| Exchange Traded Concepts, LLC | 2,160,074 | $15.3M | 0.08% | +68,913+3.3% | Added |
| UBS Group AG | 1,772,173 | $12.5M | 0.00% | +1,278,596+259.0% | Added |
| HRT Financial LP | 1,125,849 | $7.97M | 0.01% | +1,125,849 | New |
| BlackRock, Inc. | 1,074,524 | $7.61M | 0.00% | −46,361−4.1% | Reduced |
| JPMorgan Chase & Co | 966,797 | $6.78M | 0.00% | −106,276−9.9% | Reduced |
| Geode Capital Management, LLC | 693,934 | $4.92M | 0.00% | +34,546+5.2% | Added |
| LMR Partners LLP | 690,702 | $4.89M | 0.04% | 00.0% | Unchanged |
| D. E. Shaw & Co., Inc. | 667,968 | $4.73M | 0.00% | −546,809−45.0% | Reduced |
| Hudson Bay Capital Management LP | 589,293 | $4.17M | 0.02% | +137,006+30.3% | Added |
| Pacer Advisors, Inc. | 574,618 | $4.07M | 0.01% | +574,618 | New |
| Susquehanna International Group, LLP | 571,832 | $4.05M | 0.00% | +241,556+73.1% | Added |
| Winton Group Ltd | 504,000 | $3.57M | 0.12% | +7,700+1.6% | Added |
| Morgan Stanley | 412,815 | $2.92M | 0.00% | +127,266+44.6% | Added |
| Verition Fund Management LLC | 374,958 | $2.65M | 0.02% | −70,000−15.7% | Reduced |
| Vanguard Fiduciary Trust Co | 365,772 | $2.59M | 0.00% | +65,365+21.8% | Added |
| Vennlight Capital Management, LP | 353,010 | $2.50M | 1.68% | −222,489−38.7% | Reduced |
| State Street Corp | 346,696 | $2.45M | 0.00% | +1,176+0.3% | Added |
| Charles Schwab Investment Management Inc | 333,599 | $2.36M | 0.00% | −4,392−1.3% | Reduced |
| Highbridge Capital Management LLC | 244,000 | $1.71M | 0.06% | +244,000 | New |
| Jane Street Group, LLC | 240,719 | $1.70M | 0.00% | +240,719 | New |
| Alyeska Investment Group, L.P. | 222,000 | $1.57M | 0.00% | −500,000−69.3% | Reduced |
| Renaissance Technologies LLC | 183,800 | $1.30M | 0.00% | −224,100−54.9% | Reduced |
| Creek Drive Management Group LLC | 175,000 | $1.24M | 0.77% | −155,000−47.0% | Reduced |
| CastleKnight Management LP | 165,400 | $1.17M | 0.04% | +104,700+172.5% | Added |
| FNY Investment Advisers, LLC | 151,650 | $1.07M | 0.39% | +85,490+129.2% | Added |
| Shay Capital LLC | 134,539 | $952.5K | 0.11% | +16,453+13.9% | Added |
| Northern Trust Corp | 126,539 | $895.9K | 0.00% | +2,002+1.6% | Added |
| Yorkville Advisors Global, LP | 122,000 | $863.8K | 1.00% | 00.0% | Unchanged |
| Harraden Circle Investments, LLC | 122,000 | $863.8K | 0.11% | 00.0% | Unchanged |
| Commonwealth Equity Services, LLC | 110,794 | $784.4K | 0.00% | +10,663+10.6% | Added |
| Toronto Dominion Bank | 110,000 | $778.8K | 0.00% | −115,974−51.3% | Reduced |
| Magnetar Financial LLC | 244,000 | $737.1K | 0.01% | 00.0% | Unchanged |
| Periscope Capital Inc. | 122,000 | $729.6K | 0.12% | 00.0% | Unchanged |
| Millennium Management LLC | 96,035 | $679.9K | 0.00% | +96,035 | New |
| XTX Topco Ltd | 94,601 | $669.8K | 0.01% | +94,601 | New |
| Mount Lucas Management LP | 93,000 | $658.4K | 0.23% | +41,500+80.6% | Added |
| Aquatic Capital Management LLC | 88,952 | $629.8K | 0.02% | +88,952 | New |
| Sona Asset Management (US) LLC | 85,566 | $605.8K | 0.02% | 00.0% | Unchanged |
| Squarepoint Ops LLC | 85,500 | $605.3K | 0.00% | −87,709−50.6% | Reduced |
| Voloridge Investment Management, LLC | 83,374 | $590.3K | 0.00% | +83,374 | New |
| Engineers Gate Manager LP | 82,295 | $582.6K | 0.01% | +82,295 | New |
| Tiemann Investment Advisors, LLC | 75,995 | $538.0K | 0.19% | 00.0% | Unchanged |
| Moore Capital Management, LP | 75,000 | $531.0K | 0.01% | 00.0% | Unchanged |
| IMC-Chicago, LLC | 74,991 | $530.9K | 0.00% | +53,834+254.5% | Added |
| Parallax Volatility Advisers, L.P. | 68,518 | $485.1K | 0.02% | +68,518 | New |
| AQR Capital Management LLC | 59,777 | $423.2K | 0.00% | +59,777 | New |
| Goldman Sachs Group Inc | 59,425 | $420.7K | 0.00% | −336,813−85.0% | Reduced |
| Swiss National Bank | 56,600 | $400.7K | 0.00% | 00.0% | Unchanged |
| Balyasny Asset Management LLC | 56,461 | $399.7K | 0.00% | −149,442−72.6% | Reduced |
| Allstate Corp | 50,205 | $355.5K | 0.00% | +50,205 | New |
| MMCAP International Inc. SPC | 44,279 | $313.5K | 0.03% | 00.0% | Unchanged |
| LPL Financial LLC | 42,381 | $300.1K | 0.00% | +15,677+58.7% | Added |
| Tudor Investment Corp Et Al | 42,225 | $299.0K | 0.00% | +30,971+275.2% | Added |
| ExodusPoint Capital Management, LP | 40,205 | $284.7K | 0.00% | +40,205 | New |
| Simon Quick Advisors, LLC | 40,000 | $283.2K | 0.01% | 00.0% | Unchanged |
| Y-Intercept (Hong Kong) Ltd | 38,150 | $270.1K | 0.01% | +38,150 | New |
| California State Teachers Retirement System | 31,276 | $221.4K | 0.00% | 00.0% | Unchanged |
| Canada Pension Plan Investment Board | 29,000 | $205.3K | 0.00% | +29,000 | New |
| American Century Companies Inc | 26,768 | $189.5K | 0.00% | +26,768 | New |
| UBS Asset Management Americas Inc | 26,399 | $186.9K | 0.00% | −37,101−58.4% | Reduced |
| Bank of America Corp | 25,431 | $180.1K | 0.00% | −107,319−80.8% | Reduced |
| Prelude Capital Management, LLC | 25,000 | $177.0K | 0.01% | +12,381+98.1% | Added |
| Advisory Services Network, LLC | 24,555 | $173.8K | 0.00% | +3,620+17.3% | Added |
| DRW Securities, LLC | 22,000 | $155.8K | 0.01% | 00.0% | Unchanged |
| Legal & General Group Plc | 21,537 | $152.5K | 0.00% | +6,308+41.4% | Added |
| Foundations Investment Advisors, LLC | 21,000 | $148.7K | 0.00% | +21,000 | New |
| SLT Holdings LLC | 21,000 | $148.7K | 0.09% | +21,000 | New |
| Marshall Wace, LLP | 20,278 | $143.6K | 0.00% | −5,999−22.8% | Reduced |
| Vanguard Global Advisers, LLC | 19,963 | $141.3K | 0.00% | −7,092−26.2% | Reduced |
| Vanguard Asset Management, Ltd | 19,453 | $137.7K | 0.00% | 00.0% | Unchanged |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 17,093 | $121.0K | 0.00% | +17,093 | New |
| Bank of New York Mellon Corp | 16,911 | $119.7K | 0.00% | −124−0.7% | Reduced |
| Jones Financial Companies LLLP | 17,382 | $117.0K | 0.00% | +8,729+100.9% | Added |
| Bank of Montreal | 16,469 | $116.6K | 0.00% | +3,949+31.5% | Added |
| Flax Pond Capital, LLC | 16,000 | $113.3K | 0.08% | 00.0% | Unchanged |
| Valeo Financial Advisors, LLC | 15,000 | $106.2K | 0.00% | +15,000 | New |
| DnB Asset Management AS | 11,430 | $80.9K | 0.00% | +11,430 | New |
| Vanguard Investments Australia, Ltd. | 10,674 | $75.6K | 0.00% | 00.0% | Unchanged |
| Citadel Advisors LLC | 10,061 | $71.2K | 0.00% | −1,267,197−99.2% | Reduced |
| Cornerstone Advisory, LLC | 10,003 | $70.8K | 0.01% | +10,003 | New |
| First Foundation Advisors | 10,000 | $70.8K | 0.00% | 00.0% | Unchanged |
| Insigneo Advisory Services, LLC | 10,000 | $70.8K | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 7,000 | $49.6K | 0.00% | +7,000 | New |
| Federation des caisses Desjardins du Quebec | 6,450 | $45.7K | 0.00% | +1,100+20.6% | Added |
| KLP Kapitalforvaltning AS | 6,300 | $44.6K | 0.00% | 00.0% | Unchanged |
| US Bancorp | 4,500 | $31.9K | 0.00% | +4,500 | New |
| SkyView Investment Advisors, LLC | 3,844 | $27.0K | 0.02% | +3,844 | New |
| Royal Bank of Canada | 3,333 | $24.0K | 0.00% | −22,288−87.0% | Reduced |
| Advisor Group Holdings, Inc. | 2,737 | $19.4K | 0.00% | +208+8.2% | Added |
| Anchor Investment Management, LLC | 2,100 | $14.9K | 0.00% | 00.0% | Unchanged |
| National Bank of Canada | 1,999 | $14.1K | 0.00% | −5,501−73.3% | Reduced |
| Citigroup Inc | 1,510 | $10.7K | 0.00% | −25,398−94.4% | Reduced |
| FMR LLC | 1,300 | $9.20K | 0.00% | +1,300 | New |
| SRS Capital Advisors, Inc. | 903 | $6.39K | 0.00% | +903 | New |
| Cherry Tree Wealth Management, LLC | 692 | $4.90K | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 594 | $4.21K | 0.00% | +594 | New |
| Caitong International Asset Management Co., Ltd | 447 | $3.17K | 0.00% | +447 | New |
| Essential Partners LLC | 407 | $2.88K | 0.00% | +407 | New |
| Barclays PLC | 354 | $2.51K | 0.00% | +354 | New |