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, 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
- 88
- +8 vs. Q4 2025
- Shares held
- 18.6M
- −425.1K (−2.2%) vs. Q4 2025
- Total value
- $111.3M
- −$5.05M (−4.3%) vs. Q4 2025
- New holders
- 35
- 19 more added
- Sold out
- 27
- 22 more reduced
2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, 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 |
|---|---|---|---|---|---|
| CoreCap Advisors, LLC | 7 | $42 | 0.00% | 00.0% | Unchanged |
| Root Financial Partners, LLC | 50 | $300 | 0.00% | 00.0% | Unchanged |
| Signature Resources Capital Management, LLC | 70 | $420 | 0.00% | +70 | New |
| Redwood Park Advisors LLC | 87 | $523 | 0.00% | +87 | New |
| Tower Research Capital LLC (TRC) | 103 | $619 | 0.00% | −1,577−93.9% | Reduced |
| DB Fitzpatrick & Co, Inc | 150 | $901 | 0.00% | +80+114.3% | Added |
| Steward Partners Investment Advisory, LLC | 200 | $1.20K | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 248 | $1.52K | 0.00% | 00.0% | Unchanged |
| Cherry Tree Wealth Management, LLC | 692 | $4.16K | 0.00% | 00.0% | Unchanged |
| Anchor Investment Management, LLC | 2,100 | $12.6K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 2,529 | $15.2K | 0.00% | +98+4.0% | Added |
| Federation des caisses Desjardins du Quebec | 5,350 | $32.1K | 0.00% | +1,000+23.0% | Added |
| KLP Kapitalforvaltning AS | 6,300 | $37.8K | 0.00% | +6,300 | New |
| National Bank of Canada | 7,500 | $45.0K | 0.00% | −9,500−55.9% | Reduced |
| Jones Financial Companies LLLP | 8,653 | $52.0K | 0.00% | +8,653 | New |
| First Foundation Advisors | 10,000 | $60.0K | 0.00% | +10,000 | New |
| Insigneo Advisory Services, LLC | 10,000 | $60.0K | 0.00% | +10,000 | New |
| WealthPlan Investment Management, LLC | 10,206 | $61.3K | 0.00% | +10,206 | New |
| Vanguard Investments Australia, Ltd. | 10,674 | $64.1K | 0.00% | +10,674 | New |
| Tudor Investment Corp Et Al | 11,254 | $67.6K | 0.00% | +11,254 | New |
| Bank of Montreal | 12,520 | $75.2K | 0.00% | +12,520 | New |
| Prelude Capital Management, LLC | 12,619 | $75.8K | 0.01% | +12,619 | New |
| Legal & General Group Plc | 15,229 | $91.5K | 0.00% | +15,229 | New |
| Flax Pond Capital, LLC | 16,000 | $96.1K | 0.08% | +16,000 | New |
| T3 Companies, LLC | 16,295 | $97.9K | 0.13% | −12,205−42.8% | Reduced |
| Level Four Advisory Services, LLC | 16,375 | $98.3K | 0.00% | +16,375 | New |
| Bank of New York Mellon Corp | 17,035 | $102.3K | 0.00% | +17,035 | New |
| Schonfeld Strategic Advisors LLC | 19,254 | $115.6K | 0.00% | +1,426+8.0% | Added |
| Vanguard Asset Management, Ltd | 19,453 | $116.8K | 0.00% | +19,453 | New |
| Advisory Services Network, LLC | 20,935 | $125.7K | 0.00% | +20,935 | New |
| IMC-Chicago, LLC | 21,157 | $127.0K | 0.00% | +21,157 | New |
| Flow Traders U.S. LLC | 21,530 | $129.0K | 0.00% | +21,530 | New |
| DRW Securities, LLC | 22,000 | $132.1K | 0.01% | +22,000 | New |
| Brevan Howard Capital Management LP | 25,153 | $151.0K | 0.00% | −1,247−4.7% | Reduced |
| Royal Bank of Canada | 25,621 | $154.0K | 0.00% | −7,371−22.3% | Reduced |
| Marshall Wace, LLP | 26,277 | $157.7K | 0.00% | −4,616−14.9% | Reduced |
| LPL Financial LLC | 26,704 | $160.4K | 0.00% | +26,704 | New |
| Citigroup Inc | 26,908 | $161.6K | 0.00% | +14,589+118.4% | Added |
| Vanguard Global Advisers, LLC | 27,055 | $162.5K | 0.00% | +27,055 | New |
| California State Teachers Retirement System | 31,276 | $187.8K | 0.00% | +31,276 | New |
| Bluefin Capital Management, LLC | 32,463 | $194.9K | 0.19% | +32,463 | New |
| Simon Quick Advisors, LLC | 40,000 | $240.2K | 0.01% | −5,000−11.1% | Reduced |
| MMCAP International Inc. SPC | 44,279 | $265.9K | 0.02% | −705,721−94.1% | Reduced |
| Mount Lucas Management LP | 51,500 | $309.3K | 0.11% | +11,500+28.7% | Added |
| Swiss National Bank | 56,600 | $339.9K | 0.00% | +56,600 | New |
| Diametric Capital, LP | 59,191 | $355.4K | 0.09% | +59,191 | New |
| CastleKnight Management LP | 60,700 | $364.5K | 0.02% | 00.0% | Unchanged |
| UBS Asset Management Americas Inc | 63,500 | $381.3K | 0.00% | +63,500 | New |
| Massar Capital Management, LP | 65,000 | $390.3K | 0.08% | 00.0% | Unchanged |
| FNY Investment Advisers, LLC | 66,160 | $397.0K | 0.18% | −23,840−26.5% | Reduced |
| Moore Capital Management, LP | 75,000 | $450.4K | 0.02% | +25,000+50.0% | Added |
| Tiemann Investment Advisors, LLC | 75,995 | $456.4K | 0.18% | 00.0% | Unchanged |
| K2 Principal Fund, L.P. | 80,000 | $480.8K | 0.05% | +80,000 | New |
| Sona Asset Management (US) LLC | 85,566 | $513.8K | 0.02% | −14,434−14.4% | Reduced |
| Periscope Capital Inc. | 122,000 | $579.5K | 0.10% | 00.0% | Unchanged |
| Commonwealth Equity Services, LLC | 100,131 | $601.3K | 0.00% | +46,108+85.3% | Added |
| Shay Capital LLC | 118,086 | $709.1K | 0.10% | −159,277−57.4% | Reduced |
| Harraden Circle Investments, LLC | 122,000 | $732.6K | 0.15% | 00.0% | Unchanged |
| Yorkville Advisors Global, LP | 122,000 | $732.6K | 0.50% | +122,000 | New |
| Northern Trust Corp | 124,537 | $747.8K | 0.00% | −31,840−20.4% | Reduced |
| Bank of America Corp | 132,750 | $797.2K | 0.00% | +65,021+96.0% | Added |
| Squarepoint Ops LLC | 173,209 | $1.04M | 0.00% | +84,002+94.2% | Added |
| Balyasny Asset Management LLC | 205,903 | $1.24M | 0.00% | −1,195,050−85.3% | Reduced |
| Toronto Dominion Bank | 225,974 | $1.36M | 0.00% | +200,974+803.9% | Added |
| HITE Hedge Asset Management LLC | 240,113 | $1.44M | 0.08% | +240,113 | New |
| Magnetar Financial LLC | 244,000 | $1.47M | 0.01% | +219,115+880.5% | Added |
| Morgan Stanley | 285,549 | $1.71M | 0.00% | +163,242+133.5% | Added |
| Vanguard Fiduciary Trust Co | 300,407 | $1.80M | 0.00% | +300,407 | New |
| Creek Drive Management Group LLC | 330,000 | $1.98M | 1.24% | +330,000 | New |
| Susquehanna International Group, LLP | 330,276 | $1.98M | 0.00% | −18,256−5.2% | Reduced |
| Charles Schwab Investment Management Inc | 337,991 | $2.03M | 0.00% | −72,886−17.7% | Reduced |
| State Street Corp | 345,520 | $2.07M | 0.00% | +18,820+5.8% | Added |
| Goldman Sachs Group Inc | 396,238 | $2.38M | 0.00% | +114,474+40.6% | Added |
| Renaissance Technologies LLC | 407,900 | $2.45M | 0.00% | +235,100+136.1% | Added |
| Verition Fund Management LLC | 444,958 | $2.67M | 0.03% | −308,845−41.0% | Reduced |
| Hudson Bay Capital Management LP | 452,287 | $2.72M | 0.02% | −283,751−38.6% | Reduced |
| UBS Group AG | 493,577 | $2.96M | 0.00% | −19,067−3.7% | Reduced |
| Winton Group Ltd | 496,300 | $2.98M | 0.10% | −149,890−23.2% | Reduced |
| Vennlight Capital Management, LP | 575,499 | $3.46M | 3.49% | +575,499 | New |
| Geode Capital Management, LLC | 659,388 | $3.96M | 0.00% | −136,939−17.2% | Reduced |
| LMR Partners LLP | 690,702 | $4.15M | 0.04% | +102,488+17.4% | Added |
| Alyeska Investment Group, L.P. | 722,000 | $4.31M | 0.01% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 1,073,073 | $5.93M | 0.00% | −97,014−8.3% | Reduced |
| BlackRock, Inc. | 1,120,885 | $6.73M | 0.00% | +28,384+2.6% | Added |
| D. E. Shaw & Co., Inc. | 1,214,777 | $7.29M | 0.01% | +135,231+12.5% | Added |
| Citadel Advisors LLC | 1,277,258 | $7.67M | 0.01% | −751,950−37.1% | Reduced |
| Vanguard Capital Management LLC | 1,303,452 | $7.83M | 0.00% | +1,303,452 | New |
| Exchange Traded Concepts, LLC | 2,091,161 | $12.6M | 0.10% | +2,091,161 | New |
| Senator Investment Group LP | 0 | $0 | 0.00% | −900,000−100.0% | Sold out |
| Cantor Fitzgerald, L. P. | 0 | $0 | 0.00% | −550,000−100.0% | Sold out |
| HBK Investments L P | 0 | $0 | 0.00% | −500,000−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −301,213−100.0% | Sold out |
| Highbridge Capital Management LLC | 0 | $0 | 0.00% | −244,000−100.0% | Sold out |
| Danske Bank A/S | 0 | $0 | 0.00% | −213,401−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −210,581−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −97,218−100.0% | Sold out |
| SkyView Investment Advisors, LLC | 0 | $0 | 0.00% | −83,844−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −77,900−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −57,712−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −51,654−100.0% | Sold out |