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 |
|---|---|---|---|---|---|
| Clearstead Advisors, LLC | 10 | $71 | 0.00% | +10 | New |
| Rothschild Investment LLC | 18 | $127 | 0.00% | +18 | New |
| Hollencrest Capital Management | 30 | $212 | 0.00% | +30 | New |
| Quarry LP | 49 | $347 | 0.00% | +49 | New |
| SJS Investment Consulting Inc. | 59 | $418 | 0.00% | +59 | New |
| Allworth Financial LP | 72 | $510 | 0.00% | +72 | New |
| Redwood Park Advisors LLC | 109 | $772 | 0.00% | +22+25.3% | Added |
| Parallel Advisors, LLC | 171 | $1.21K | 0.00% | +171 | New |
| Steward Partners Investment Advisory, LLC | 200 | $1.42K | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 301 | $2.13K | 0.00% | +53+21.4% | Added |
| Barclays PLC | 354 | $2.51K | 0.00% | +354 | New |
| Essential Partners LLC | 407 | $2.88K | 0.00% | +407 | New |
| Caitong International Asset Management Co., Ltd | 447 | $3.17K | 0.00% | +447 | New |
| EverSource Wealth Advisors, LLC | 594 | $4.21K | 0.00% | +594 | New |
| Cherry Tree Wealth Management, LLC | 692 | $4.90K | 0.00% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 903 | $6.39K | 0.00% | +903 | New |
| FMR LLC | 1,300 | $9.20K | 0.00% | +1,300 | New |
| Citigroup Inc | 1,510 | $10.7K | 0.00% | −25,398−94.4% | Reduced |
| National Bank of Canada | 1,999 | $14.1K | 0.00% | −5,501−73.3% | Reduced |
| Anchor Investment Management, LLC | 2,100 | $14.9K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 2,737 | $19.4K | 0.00% | +208+8.2% | Added |
| Royal Bank of Canada | 3,333 | $24.0K | 0.00% | −22,288−87.0% | Reduced |
| SkyView Investment Advisors, LLC | 3,844 | $27.0K | 0.02% | +3,844 | New |
| US Bancorp | 4,500 | $31.9K | 0.00% | +4,500 | New |
| KLP Kapitalforvaltning AS | 6,300 | $44.6K | 0.00% | 00.0% | Unchanged |
| Federation des caisses Desjardins du Quebec | 6,450 | $45.7K | 0.00% | +1,100+20.6% | Added |
| Rockefeller Capital Management L.P. | 7,000 | $49.6K | 0.00% | +7,000 | 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 |
| Cornerstone Advisory, LLC | 10,003 | $70.8K | 0.01% | +10,003 | New |
| Citadel Advisors LLC | 10,061 | $71.2K | 0.00% | −1,267,197−99.2% | Reduced |
| Vanguard Investments Australia, Ltd. | 10,674 | $75.6K | 0.00% | 00.0% | Unchanged |
| DnB Asset Management AS | 11,430 | $80.9K | 0.00% | +11,430 | New |
| Valeo Financial Advisors, LLC | 15,000 | $106.2K | 0.00% | +15,000 | New |
| Flax Pond Capital, LLC | 16,000 | $113.3K | 0.08% | 00.0% | Unchanged |
| Bank of Montreal | 16,469 | $116.6K | 0.00% | +3,949+31.5% | Added |
| Jones Financial Companies LLLP | 17,382 | $117.0K | 0.00% | +8,729+100.9% | Added |
| Bank of New York Mellon Corp | 16,911 | $119.7K | 0.00% | −124−0.7% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 17,093 | $121.0K | 0.00% | +17,093 | New |
| Vanguard Asset Management, Ltd | 19,453 | $137.7K | 0.00% | 00.0% | Unchanged |
| Vanguard Global Advisers, LLC | 19,963 | $141.3K | 0.00% | −7,092−26.2% | Reduced |
| Marshall Wace, LLP | 20,278 | $143.6K | 0.00% | −5,999−22.8% | Reduced |
| 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 |
| Legal & General Group Plc | 21,537 | $152.5K | 0.00% | +6,308+41.4% | Added |
| DRW Securities, LLC | 22,000 | $155.8K | 0.01% | 00.0% | Unchanged |
| Advisory Services Network, LLC | 24,555 | $173.8K | 0.00% | +3,620+17.3% | Added |
| Prelude Capital Management, LLC | 25,000 | $177.0K | 0.01% | +12,381+98.1% | Added |
| Bank of America Corp | 25,431 | $180.1K | 0.00% | −107,319−80.8% | Reduced |
| UBS Asset Management Americas Inc | 26,399 | $186.9K | 0.00% | −37,101−58.4% | Reduced |
| American Century Companies Inc | 26,768 | $189.5K | 0.00% | +26,768 | New |
| Canada Pension Plan Investment Board | 29,000 | $205.3K | 0.00% | +29,000 | New |
| California State Teachers Retirement System | 31,276 | $221.4K | 0.00% | 00.0% | Unchanged |
| Y-Intercept (Hong Kong) Ltd | 38,150 | $270.1K | 0.01% | +38,150 | New |
| Simon Quick Advisors, LLC | 40,000 | $283.2K | 0.01% | 00.0% | Unchanged |
| ExodusPoint Capital Management, LP | 40,205 | $284.7K | 0.00% | +40,205 | New |
| Tudor Investment Corp Et Al | 42,225 | $299.0K | 0.00% | +30,971+275.2% | Added |
| LPL Financial LLC | 42,381 | $300.1K | 0.00% | +15,677+58.7% | Added |
| MMCAP International Inc. SPC | 44,279 | $313.5K | 0.03% | 00.0% | Unchanged |
| Allstate Corp | 50,205 | $355.5K | 0.00% | +50,205 | New |
| Balyasny Asset Management LLC | 56,461 | $399.7K | 0.00% | −149,442−72.6% | Reduced |
| Swiss National Bank | 56,600 | $400.7K | 0.00% | 00.0% | Unchanged |
| Goldman Sachs Group Inc | 59,425 | $420.7K | 0.00% | −336,813−85.0% | Reduced |
| AQR Capital Management LLC | 59,777 | $423.2K | 0.00% | +59,777 | New |
| Parallax Volatility Advisers, L.P. | 68,518 | $485.1K | 0.02% | +68,518 | New |
| IMC-Chicago, LLC | 74,991 | $530.9K | 0.00% | +53,834+254.5% | Added |
| Moore Capital Management, LP | 75,000 | $531.0K | 0.01% | 00.0% | Unchanged |
| Tiemann Investment Advisors, LLC | 75,995 | $538.0K | 0.19% | 00.0% | Unchanged |
| Engineers Gate Manager LP | 82,295 | $582.6K | 0.01% | +82,295 | New |
| Voloridge Investment Management, LLC | 83,374 | $590.3K | 0.00% | +83,374 | New |
| Squarepoint Ops LLC | 85,500 | $605.3K | 0.00% | −87,709−50.6% | Reduced |
| Sona Asset Management (US) LLC | 85,566 | $605.8K | 0.02% | 00.0% | Unchanged |
| Aquatic Capital Management LLC | 88,952 | $629.8K | 0.02% | +88,952 | New |
| Mount Lucas Management LP | 93,000 | $658.4K | 0.23% | +41,500+80.6% | Added |
| XTX Topco Ltd | 94,601 | $669.8K | 0.01% | +94,601 | New |
| Millennium Management LLC | 96,035 | $679.9K | 0.00% | +96,035 | New |
| Periscope Capital Inc. | 122,000 | $729.6K | 0.12% | 00.0% | Unchanged |
| Magnetar Financial LLC | 244,000 | $737.1K | 0.01% | 00.0% | Unchanged |
| Toronto Dominion Bank | 110,000 | $778.8K | 0.00% | −115,974−51.3% | Reduced |
| Commonwealth Equity Services, LLC | 110,794 | $784.4K | 0.00% | +10,663+10.6% | 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 |
| Northern Trust Corp | 126,539 | $895.9K | 0.00% | +2,002+1.6% | Added |
| Shay Capital LLC | 134,539 | $952.5K | 0.11% | +16,453+13.9% | Added |
| FNY Investment Advisers, LLC | 151,650 | $1.07M | 0.39% | +85,490+129.2% | Added |
| CastleKnight Management LP | 165,400 | $1.17M | 0.04% | +104,700+172.5% | Added |
| Creek Drive Management Group LLC | 175,000 | $1.24M | 0.77% | −155,000−47.0% | Reduced |
| Renaissance Technologies LLC | 183,800 | $1.30M | 0.00% | −224,100−54.9% | Reduced |
| Alyeska Investment Group, L.P. | 222,000 | $1.57M | 0.00% | −500,000−69.3% | Reduced |
| Jane Street Group, LLC | 240,719 | $1.70M | 0.00% | +240,719 | New |
| Highbridge Capital Management LLC | 244,000 | $1.71M | 0.06% | +244,000 | New |
| Charles Schwab Investment Management Inc | 333,599 | $2.36M | 0.00% | −4,392−1.3% | Reduced |
| State Street Corp | 346,696 | $2.45M | 0.00% | +1,176+0.3% | Added |
| Vennlight Capital Management, LP | 353,010 | $2.50M | 1.68% | −222,489−38.7% | Reduced |
| Vanguard Fiduciary Trust Co | 365,772 | $2.59M | 0.00% | +65,365+21.8% | Added |
| Verition Fund Management LLC | 374,958 | $2.65M | 0.02% | −70,000−15.7% | Reduced |
| Morgan Stanley | 412,815 | $2.92M | 0.00% | +127,266+44.6% | Added |
| Winton Group Ltd | 504,000 | $3.57M | 0.12% | +7,700+1.6% | Added |
| Susquehanna International Group, LLP | 571,832 | $4.05M | 0.00% | +241,556+73.1% | Added |
| Pacer Advisors, Inc. | 574,618 | $4.07M | 0.01% | +574,618 | New |