Terrestrial EnergyIMSR
13F holders, Q2 2026 (June 30)110holders +22
38new positions
16sold out
6famous investors
$7.02avg. 13F price*
At the end of Q2 2026, 110 institutions reported holding Terrestrial Energy Inc. (IMSR) in their 13F filings, up 22 from Q1 2026. 38 opened new positions and 16 sold out. The largest holders were Vanguard Capital Management LLC ($24.2M), Exchange Traded Concepts, LLC ($15.3M) and UBS Group AG ($12.5M). 6 famous investors held it, including David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio), Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio).
- Company
- Terrestrial Energy Inc.
- CUSIP
- 881454102
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 38 | $21.6M |
| Exits | 16 | $3.5M |
All 13F filers, Q1 2026 → Q2 2026: 7,528,878 shares bought and 4,629,344 shares sold, net +2,899,534 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 110 holders
| Vanguard Capital Management LLC | 0.00% | Add +161.9% | 3,414,196 | $24.2M |
| Exchange Traded Concepts, LLC | 0.08% | Add +3.3% | 2,160,074 | $15.3M |
| UBS Group AG | 0.00% | Add +259.1% | 1,772,173 | $12.5M |
| HRT Financial LP | 0.01% | New | 1,125,849 | $8.0M |
| BlackRock, Inc. | 0.00% | Reduce -4.1% | 1,074,524 | $7.6M |
| JPMorgan Chase & Co. | 0.00% | Reduce -9.9% | 966,797 | $6.8M |
| Geode Capital Management, LLC | 0.00% | Add +5.2% | 693,934 | $4.9M |
| LMR Partners LLP | 0.04% | No change | 690,702 | $4.9M |
| D. E. Shaw & Co. | 0.00% | Reduce -45.0% | 667,968 | $4.7M |
| Hudson Bay Capital Management LP | 0.02% | Add +30.3% | 589,293 | $4.2M |
| Pacer Advisors, Inc. | 0.01% | New | 574,618 | $4.1M |
| Susquehanna International Group, LLP | 0.00% | Add +73.1% | 571,832 | $4.0M |
| WINTON GROUP Ltd | 0.12% | Add +1.6% | 504,000 | $3.6M |
| Morgan Stanley | 0.00% | Add +44.6% | 412,815 | $2.9M |
| Verition Fund Management LLC | 0.02% | Reduce -15.7% | 374,958 | $2.7M |
| Vanguard Fiduciary Trust Co. | 0.00% | Add +21.8% | 365,772 | $2.6M |
| Vennlight Capital Management, LP | 1.68% | Reduce -38.7% | 353,010 | $2.5M |
| State Street Corp. | 0.00% | Add +0.3% | 346,696 | $2.5M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -1.3% | 333,599 | $2.4M |
| Highbridge Capital Management LLC | 0.11% | New | 244,000 | $1.7M |
| Jane Street Group, LLC | 0.00% | New | 240,719 | $1.7M |
| Alyeska Investment Group, L.P. | 0.00% | Reduce -69.3% | 222,000 | $1.6M |
| Renaissance Technologies | 0.00% | Reduce -54.9% | 183,800 | $1.3M |
| Creek Drive Management Group LLC | 0.77% | Reduce -47.0% | 175,000 | $1.2M |
| CastleKnight Management LP | 0.04% | Add +172.5% | 165,400 | $1.2M |
| FNY Investment Advisers, LLC | 0.39% | Add +129.2% | 151,650 | $1.1M |
| Shay Capital LLC | 0.11% | Add +13.9% | 134,539 | $953K |
| Northern Trust Corp. | 0.00% | Add +1.6% | 126,539 | $896K |
| Yorkville Advisors Global, LP | 1.01% | No change | 122,000 | $864K |
| Harraden Circle Investments, LLC | 0.12% | No change | 122,000 | $864K |
| Commonwealth Equity Services, LLC | 0.00% | Add +10.7% | 110,794 | $784K |
| Toronto Dominion Bank | 0.00% | Reduce -51.3% | 110,000 | $779K |
| Magnetar Financial LLC | 0.01% | No change | 244,000 | $737K |
| Periscope Capital Inc. | 0.12% | No change | 122,000 | $730K |
| Millennium Management | 0.00% | New | 96,035 | $680K |
| XTX Topco Ltd | 0.01% | New | 94,601 | $670K |
| Mount Lucas Management LP | 0.23% | Add +80.6% | 93,000 | $658K |
| Aquatic Capital Management LLC | 0.02% | New | 88,952 | $630K |
| Sona Asset Management (us) LLC | 0.03% | No change | 85,566 | $606K |
| Squarepoint Ops LLC | 0.00% | Reduce -50.6% | 85,500 | $605K |
| Voloridge Investment Management, LLC | 0.00% | New | 83,374 | $590K |
| Engineers Gate Manager LP | 0.01% | New | 82,295 | $583K |
| Tiemann Investment Advisors, LLC | 0.19% | No change | 75,995 | $538K |
| Moore Capital Management, LP | 0.01% | No change | 75,000 | $531K |
| IMC-Chicago, LLC | 0.00% | Add +254.4% | 74,991 | $531K |
| Parallax Volatility Advisers, L.P. | 0.02% | New | 68,518 | $485K |
| AQR Capital Management | 0.00% | New | 59,777 | $423K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -85.0% | 59,425 | $421K |
| Swiss National Bank | 0.00% | No change | 56,600 | $401K |
| Balyasny Asset Management L.P. | 0.00% | Reduce -72.6% | 56,461 | $400K |
| Allstate Corp. | 0.00% | New | 50,205 | $355K |
| MMCAP International Inc. SPC | 0.03% | No change | 44,279 | $313K |
| LPL Financial LLC | 0.00% | Add +58.7% | 42,381 | $300K |
| Tudor Investment Corporation | 0.00% | Add +275.2% | 42,225 | $299K |
| ExodusPoint Capital Management, LP | 0.00% | New | 40,205 | $285K |
| Simon Quick Advisors, LLC | 0.01% | No change | 40,000 | $283K |
| Y-Intercept (Hong Kong) Ltd | 0.01% | New | 38,150 | $270K |
| California State Teachers Retirement System | 0.00% | No change | 31,276 | $221K |
| Canada Pension Plan Investment Board | 0.00% | New | 29,000 | $205K |
| American Century Companies Inc. | 0.00% | New | 26,768 | $190K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -58.4% | 26,399 | $187K |
| Bank of America Corp. | 0.00% | Reduce -80.8% | 25,431 | $180K |
| Prelude Capital Management, LLC | 0.01% | Add +98.1% | 25,000 | $177K |
| Advisory Services Network, LLC | 0.00% | Add +17.3% | 24,555 | $174K |
| DRW Securities, LLC | 0.01% | No change | 22,000 | $156K |
| Legal & General Group Plc | 0.00% | Add +41.4% | 21,537 | $152K |
| SLT Holdings LLC | 0.10% | New | 21,000 | $149K |
| Foundations Investment Advisors, LLC | 0.00% | New | 21,000 | $149K |
| Marshall Wace, LLP | 0.00% | Reduce -22.8% | 20,278 | $144K |
| Vanguard Global Advisers, LLC | 0.00% | Reduce -26.2% | 19,963 | $141K |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | No change | 19,453 | $138K |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.00% | New | 17,093 | $121K |
| Bank of New York Mellon Corp | 0.00% | Reduce -0.7% | 16,911 | $120K |
| Jones Financial Companies LLLP | 0.00% | Add +100.9% | 17,382 | $117K |
| Bank of Montreal | 0.00% | Add +31.5% | 16,469 | $117K |
| Flax Pond Capital, LLC | 0.08% | No change | 16,000 | $113K |
| Valeo Financial Advisors, LLC | 0.00% | New | 15,000 | $106K |
| DNB Asset Management AS | 0.00% | New | 11,430 | $81K |
| Vanguard Investments Australia, Ltd. | 0.00% | No change | 10,674 | $76K |
| Citadel Advisors | 0.00% | Reduce -99.2% | 10,061 | $71K |
| Cornerstone Advisory, LLC | 0.01% | New | 10,003 | $71K |
| Insigneo Advisory Services, LLC | 0.00% | No change | 10,000 | $71K |
| First Foundation Advisors | 0.00% | No change | 10,000 | $71K |
| Rockefeller Capital Management L.P. | 0.00% | New | 7,000 | $50K |
| Federation des caisses Desjardins du Quebec | 0.00% | Add +20.6% | 6,450 | $46K |
| KLP Kapitalforvaltning As | 0.00% | No change | 6,300 | $45K |
| US Bancorp \de | 0.00% | New | 4,500 | $32K |
| SkyView Investment Advisors, LLC | 0.02% | New | 3,844 | $27K |
| Royal Bank of Canada | 0.00% | Reduce -87.0% | 3,333 | $24K |
| Osaic Holdings, Inc. | 0.00% | Add +8.2% | 2,737 | $19K |
| Anchor Investment Management, LLC | 0.00% | No change | 2,100 | $15K |
| National Bank of Canada | 0.00% | Reduce -73.3% | 1,999 | $14K |
| Citigroup Inc. | 0.00% | Reduce -94.4% | 1,510 | $11K |
| FMR LLC | 0.00% | New | 1,300 | $9K |
| Arax Advisory Partners | 0.00% | New | 903 | $6K |
| Cherry Tree Wealth Management, LLC | 0.00% | No change | 692 | $5K |
| EverSource Wealth Advisors, LLC | 0.00% | New | 594 | $4K |
| Caitong International Asset Management Co., Ltd | 0.00% | New | 447 | $3K |
| Essential Partners LLC | 0.00% | New | 407 | $3K |
| Barclays PLC | 0.00% | New | 354 | $3K |
"% of holder's portfolio" is IMSR's weight in each manager's 13F, not the share of Terrestrial Energy Inc. the manager owns.