Terrestrial Energy Inc. /DE/ - IMSR
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| EXCHANGE TRADED CONCEPTS, LLC | History | New | 2,091,161 | 12,557 | 0.09% | — | 1 | +2,091,161 | New | Q1 2026 | Apr 14, 2026 |
| CITADEL ADVISORS LLC | History | Reduced | 1,965,158 | 11,800 | 0.0% | 0.0% | 2 | -447,850 | -18.56% | Q1 2026 | May 15, 2026 |
| VANGUARD GROUP INC | History | No change | 1,849,446 | 11,300 | 0.0% | 0.0% | 3 | 0 | 0.0% | Q4 2025 | Jan 29, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Added to | 1,626,076 | 9,771 | 0.0% | 0.0% | 4 | +304,544 | 23.04% | Q1 2026 | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | History | New | 1,303,452 | 7,827 | 0.0% | — | 5 | +1,303,452 | New | Q1 2026 | May 15, 2026 |
| D. E. Shaw & Co., Inc. | History | Added to | 1,214,777 | 7,294 | 0.0% | 0.0% | 6 | +135,231 | 12.53% | Q1 2026 | May 15, 2026 |
| BlackRock, Inc. | History | Added to | 1,120,885 | 6,730 | 0.0% | 0.0% | 7 | +28,384 | 2.6% | Q1 2026 | May 13, 2026 |
| JPMORGAN CHASE & CO | History | Reduced | 1,073,073 | 5,934 | 0.0% | 0.0% | 8 | -97,014 | -8.29% | Q1 2026 | May 13, 2026 |
| Alyeska Investment Group, L.P. | History | No change | 722,000 | 4,308 | 0.01% | 0.01% | 9 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| LMR Partners LLP | History | Added to | 690,702 | 4,147 | 0.01% | 0.01% | 10 | +102,488 | 17.42% | Q1 2026 | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Reduced | 659,388 | 3,962 | 0.0% | 0.0% | 11 | -136,939 | -17.2% | Q1 2026 | May 15, 2026 |
| Vennlight Capital Management, LP | History | Reduced | 575,499 | 3,455 | 3.49% | 6.97% | 12 | -502,001 | -46.59% | Q1 2026 | May 15, 2026 |
| Galaxy Group Investments LLC | History | No change | 500,000 | 3,055 | 0.36% | 0.36% | 13 | 0 | 0.0% | Q4 2025 | Mar 23, 2026 |
| WINTON GROUP Ltd | History | Reduced | 496,300 | 2,980 | 0.1% | 0.14% | 14 | -149,890 | -23.2% | Q1 2026 | May 12, 2026 |
| UBS Group AG | History | Reduced | 493,577 | 2,963 | 0.0% | 0.0% | 15 | -19,067 | -3.72% | Q1 2026 | May 05, 2026 |
| JANE STREET GROUP, LLC | History | Reduced | 486,200 | 2,919 | 0.0% | 0.0% | 16 | -38,413 | -7.32% | Q1 2026 | May 12, 2026 |
| Hudson Bay Capital Management LP | History | Reduced | 452,287 | 2,715 | 0.01% | 0.02% | 17 | -383,751 | -45.9% | Q1 2026 | May 13, 2026 |
| Verition Fund Management LLC | History | Reduced | 444,958 | 2,671 | 0.02% | 0.02% | 18 | -308,845 | -40.97% | Q1 2026 | May 15, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | Added to | 407,900 | 2,449 | 0.0% | 0.0% | 19 | +235,100 | 136.05% | Q1 2026 | May 14, 2026 |
| GOLDMAN SACHS GROUP INC | History | Added to | 396,238 | 2,379 | 0.0% | 0.0% | 20 | +114,474 | 40.63% | Q1 2026 | May 15, 2026 |
| STATE STREET CORP | History | Added to | 345,520 | 2,074 | 0.0% | 0.0% | 21 | +18,820 | 5.76% | Q1 2026 | May 15, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | History | Reduced | 337,991 | 2,029 | 0.0% | 0.0% | 22 | -72,886 | -17.74% | Q1 2026 | May 15, 2026 |
| Creek Drive Management Group LLC | History | New | 330,000 | 1,981 | 0.45% | — | 23 | +330,000 | New | Q1 2026 | May 15, 2026 |
| VANGUARD FIDUCIARY TRUST CO | History | New | 300,407 | 1,803 | 0.0% | — | 24 | +300,407 | New | Q1 2026 | May 08, 2026 |
| MORGAN STANLEY | History | Added to | 285,549 | 1,714 | 0.0% | 0.0% | 25 | +163,242 | 133.47% | Q1 2026 | May 15, 2026 |
| Magnetar Financial LLC | History | Added to | 244,000 | 1,465 | 0.01% | 0.0% | 26 | +219,115 | 880.51% | Q1 2026 | May 13, 2026 |
| HITE Hedge Asset Management LLC | History | New | 240,113 | 1,441 | 0.08% | — | 27 | +240,113 | New | Q1 2026 | May 14, 2026 |
| TORONTO DOMINION BANK | History | Added to | 225,974 | 1,356 | 0.0% | 0.0% | 28 | +200,974 | 803.9% | Q1 2026 | May 15, 2026 |
| Stoic Point Capital Management LLC | History | Reduced | 42,000 | 1,260 | 1.23% | 0.43% | 29 | -42,000 | -50.0% | Q1 2026 | May 15, 2026 |
| BALYASNY ASSET MANAGEMENT L.P. | History | Reduced | 205,903 | 1,236 | 0.0% | 0.01% | 30 | -1,195,050 | -85.3% | Q1 2026 | May 15, 2026 |
| Squarepoint Ops LLC | History | Added to | 173,209 | 1,040 | 0.0% | 0.0% | 31 | +84,002 | 94.17% | Q1 2026 | May 15, 2026 |
| GROUP ONE TRADING LLC | History | Added to | 156,600 | 940 | 0.0% | 0.0% | 32 | +144,800 | 1227.12% | Q1 2026 | May 13, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Added to | 132,750 | 797 | 0.0% | 0.0% | 33 | +65,021 | 96.0% | Q1 2026 | May 15, 2026 |
| NORTHERN TRUST CORP | History | Reduced | 124,537 | 747 | 0.0% | 0.0% | 34 | -31,840 | -20.36% | Q1 2026 | May 14, 2026 |
| Yorkville Advisors Global, LP | History | New | 122,000 | 732 | 0.47% | — | 36 | +122,000 | New | Q1 2026 | May 13, 2026 |
| Harraden Circle Investments, LLC | History | No change | 122,000 | 732 | 0.15% | 0.14% | 35 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Shay Capital LLC | History | Reduced | 118,086 | 709 | 0.06% | 0.28% | 37 | -324,277 | -73.31% | Q1 2026 | May 15, 2026 |
| IMC-Chicago, LLC | History | Added to | 110,357 | 662 | 0.0% | 0.0% | 38 | +61,257 | 124.76% | Q1 2026 | May 05, 2026 |
| COMMONWEALTH EQUITY SERVICES, LLC | History | Added to | 100,131 | 601 | 0.0% | 0.0% | 39 | +46,108 | 85.35% | Q1 2026 | Apr 27, 2026 |
| PERISCOPE CAPITAL INC. | History | No change | 122,000 | 579 | 0.06% | 0.07% | 40 | 0 | 0.0% | Q1 2026 | May 13, 2026 |
| SONA ASSET MANAGEMENT (US) LLC | History | Reduced | 85,566 | 513 | 0.01% | 0.01% | 41 | -14,434 | -14.43% | Q1 2026 | May 15, 2026 |
| K2 PRINCIPAL FUND, L.P. | History | New | 80,000 | 480 | 0.03% | — | 42 | +80,000 | New | Q1 2026 | May 14, 2026 |
| TIEMANN INVESTMENT ADVISORS, LLC | History | No change | 75,995 | 456 | 0.18% | 0.18% | 43 | 0 | 0.0% | Q1 2026 | May 12, 2026 |
| MOORE CAPITAL MANAGEMENT, LP | History | Added to | 75,000 | 450 | 0.01% | 0.0% | 44 | +25,000 | 50.0% | Q1 2026 | May 15, 2026 |
| FNY Investment Advisers, LLC | History | Reduced | 66,160 | 397 | 0.17% | 0.15% | 45 | -23,890 | -26.53% | Q1 2026 | Apr 15, 2026 |
| Massar Capital Management, LP | History | No change | 65,000 | 390 | 0.04% | 0.04% | 46 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | History | New | 63,500 | 381 | 0.0% | — | 47 | +63,500 | New | Q1 2026 | May 13, 2026 |
| CastleKnight Management LP | History | No change | 60,700 | 364 | 0.01% | 0.01% | 48 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Diametric Capital, LP | History | New | 59,191 | 355 | 0.09% | — | 49 | +59,191 | New | Q1 2026 | May 15, 2026 |
| Swiss National Bank | History | New | 56,600 | 339 | 0.0% | — | 50 | +56,600 | New | Q1 2026 | May 07, 2026 |
| Mount Lucas Management LP | History | Added to | 51,500 | 309 | 0.11% | 0.1% | 51 | +11,500 | 28.75% | Q1 2026 | May 05, 2026 |
| MMCAP International Inc. SPC | History | Reduced | 44,279 | 265 | 0.02% | 0.46% | 52 | -705,721 | -94.1% | Q1 2026 | May 15, 2026 |
| SIMON QUICK ADVISORS, LLC | History | Reduced | 40,000 | 240 | 0.01% | 0.01% | 53 | -5,000 | -11.11% | Q1 2026 | May 06, 2026 |
| BLUEFIN CAPITAL MANAGEMENT, LLC | History | New | 32,463 | 194 | 0.12% | — | 54 | +32,463 | New | Q1 2026 | May 15, 2026 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | History | New | 31,276 | 187 | 0.0% | — | 55 | +31,276 | New | Q1 2026 | May 15, 2026 |
| Vanguard Global Advisers, LLC | History | New | 27,055 | 162 | 0.0% | — | 56 | +27,055 | New | Q1 2026 | May 08, 2026 |
| CITIGROUP INC | History | Added to | 26,908 | 161 | 0.0% | 0.0% | 57 | +14,589 | 118.43% | Q1 2026 | May 11, 2026 |
| LPL Financial LLC | History | New | 26,704 | 160 | 0.0% | — | 58 | +26,704 | New | Q1 2026 | May 06, 2026 |
| MARSHALL WACE, LLP | History | Reduced | 26,277 | 157 | 0.0% | 0.0% | 59 | -4,616 | -14.94% | Q1 2026 | May 14, 2026 |
| ROYAL BANK OF CANADA | History | Reduced | 25,621 | 154 | 0.0% | 0.0% | 60 | -7,371 | -22.34% | Q1 2026 | May 15, 2026 |
| Brevan Howard Capital Management LP | History | Reduced | 25,153 | 151 | 0.0% | 0.0% | 61 | -1,247 | -4.72% | Q1 2026 | May 15, 2026 |
| DRW Securities, LLC | History | New | 22,000 | 132 | 0.0% | — | 62 | +22,000 | New | Q1 2026 | May 13, 2026 |
| FLOW TRADERS U.S. LLC | History | New | 21,530 | 129 | 0.0% | — | 63 | +21,530 | New | Q1 2026 | May 15, 2026 |
| Advisory Services Network, LLC | History | New | 20,935 | 125 | 0.0% | — | 64 | +20,935 | New | Q1 2026 | May 15, 2026 |
| VANGUARD ASSET MANAGEMENT, Ltd | History | New | 19,453 | 116 | 0.0% | — | 65 | +19,453 | New | Q1 2026 | May 08, 2026 |
| Schonfeld Strategic Advisors LLC | History | Added to | 19,254 | 115 | 0.0% | 0.0% | 66 | +1,426 | 8.0% | Q1 2026 | May 15, 2026 |
| SIMPLEX TRADING, LLC | History | Added to | 17,800 | 106 | 0.0% | 0.0% | 67 | +9,500 | 114.46% | Q1 2026 | May 14, 2026 |
| Bank of New York Mellon Corp | History | New | 17,035 | 102 | 0.0% | — | 68 | +17,035 | New | Q1 2026 | May 05, 2026 |
| T3 Companies, LLC | History | Reduced | 33,895 | 99 | 0.13% | 0.23% | 69 | -30,105 | -47.04% | Q1 2026 | May 07, 2026 |
| LEVEL FOUR ADVISORY SERVICES, LLC | History | New | 16,375 | 98 | 0.0% | — | 70 | +16,375 | New | Q1 2026 | May 14, 2026 |
| FLAX POND CAPITAL, LLC | History | New | 16,000 | 96 | 0.08% | — | 71 | +16,000 | New | Q1 2026 | May 19, 2026 |
| Legal & General Group Plc | History | New | 15,229 | 91 | 0.0% | — | 72 | +15,229 | New | Q1 2026 | May 08, 2026 |
| PRELUDE CAPITAL MANAGEMENT, LLC | History | New | 12,619 | 75 | 0.01% | — | 74 | +12,619 | New | Q1 2026 | May 15, 2026 |
| BANK OF MONTREAL /CAN/ | History | New | 12,520 | 75 | 0.0% | — | 73 | +12,520 | New | Q1 2026 | May 13, 2026 |
| TUDOR INVESTMENT CORP ET AL | History | Reduced | 11,254 | 67 | 0.0% | 0.0% | 75 | -91,746 | -89.07% | Q1 2026 | May 15, 2026 |
| Vanguard Investments Australia, Ltd. | History | New | 10,674 | 64 | 0.0% | — | 76 | +10,674 | New | Q1 2026 | May 08, 2026 |
| WealthPlan Investment Management, LLC | History | New | 10,206 | 61 | 0.0% | — | 77 | +10,206 | New | Q1 2026 | Apr 29, 2026 |
| FIRST FOUNDATION ADVISORS | History | New | 10,000 | 60 | 0.0% | — | 78 | +10,000 | New | Q1 2026 | May 04, 2026 |
| INSIGNEO ADVISORY SERVICES, LLC | History | New | 10,000 | 60 | 0.0% | — | 79 | +10,000 | New | Q1 2026 | May 12, 2026 |
| JONES FINANCIAL COMPANIES LLLP | History | New | 8,653 | 52 | 0.0% | — | 80 | +8,653 | New | Q1 2026 | May 15, 2026 |
| NATIONAL BANK OF CANADA /FI/ | History | Reduced | 7,500 | 45 | 0.0% | 0.0% | 81 | -9,500 | -55.88% | Q1 2026 | May 14, 2026 |
| KLP KAPITALFORVALTNING AS | History | New | 6,300 | 37 | 0.0% | — | 82 | +6,300 | New | Q1 2026 | Apr 29, 2026 |
| Federation des caisses Desjardins du Quebec | History | Added to | 5,350 | 32 | 0.0% | 0.0% | 83 | +1,000 | 22.99% | Q1 2026 | May 13, 2026 |
| OSAIC HOLDINGS, INC. | History | Added to | 2,529 | 15 | 0.0% | 0.0% | 84 | +98 | 4.03% | Q1 2026 | May 15, 2026 |
| Anchor Investment Management, LLC | History | No change | 2,100 | 12 | 0.0% | 0.0% | 85 | 0 | 0.0% | Q1 2026 | May 01, 2026 |
| DANSKE BANK A/S | History | Reduced | 100,000 | 6 | 0.0% | 0.0% | 86 | -483,401 | -82.86% | Q1 2026 | May 12, 2026 |
| Cherry Tree Wealth Management, LLC | History | No change | 692 | 4 | 0.0% | 0.0% | 87 | 0 | 0.0% | Q1 2026 | May 05, 2026 |
| TUCKER ASSET MANAGEMENT LLC | History | No change | 371 | 2 | 0.0% | 0.0% | 88 | 0 | 0.0% | Q4 2025 | Feb 05, 2026 |
| Steward Partners Investment Advisory, LLC | History | No change | 200 | 1 | 0.0% | 0.0% | 89 | 0 | 0.0% | Q1 2026 | May 08, 2026 |
| Farther Finance Advisors, LLC | History | No change | 248 | 1 | 0.0% | 0.0% | 90 | 0 | 0.0% | Q1 2026 | Apr 07, 2026 |
| Senator Investment Group LP | History | Closed out | 0 | 0 | — | 0.22% | — | -900,000 | -100.0% | Q1 2026 | May 13, 2026 |
| HBK INVESTMENTS L P | History | Closed out | 0 | 0 | — | 0.03% | — | -550,000 | -100.0% | Q1 2026 | May 15, 2026 |
| CANTOR FITZGERALD, L. P. | History | Closed out | 0 | 0 | — | 0.05% | — | -550,000 | -100.0% | Q1 2026 | May 15, 2026 |
| Caption Management, LLC | History | Closed out | 0 | 0 | — | 0.02% | — | -418,800 | -100.0% | Q1 2026 | May 15, 2026 |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC | History | Closed out | 0 | 0 | — | 0.05% | — | -244,000 | -100.0% | Q1 2026 | May 15, 2026 |
| Walleye Capital LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -210,581 | -100.0% | Q1 2026 | May 13, 2026 |
| WELLS FARGO & COMPANY/MN | History | Closed out | 0 | 0 | — | 0.0% | — | -100,000 | -100.0% | Q1 2026 | May 11, 2026 |
| XTX Topco Ltd | History | Closed out | 0 | 0 | — | 0.02% | — | -97,218 | -100.0% | Q1 2026 | May 15, 2026 |
| SkyView Investment Advisors, LLC | History | Closed out | 0 | 0 | — | 0.06% | — | -83,844 | -100.0% | Q1 2026 | May 14, 2026 |
| Jump Financial, LLC | History | Closed out | 0 | 0 | — | 0.01% | — | -77,900 | -100.0% | Q1 2026 | May 14, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | Closed out | 0 | 0 | — | 0.0% | — | -57,712 | -100.0% | Q1 2026 | May 15, 2026 |
| Engineers Gate Manager LP | History | Closed out | 0 | 0 | — | 0.0% | — | -51,654 | -100.0% | Q1 2026 | May 15, 2026 |
| BARCLAYS PLC | History | Closed out | 0 | 0 | — | 0.0% | — | -45,275 | -100.0% | Q1 2026 | May 14, 2026 |
| MILLENNIUM MANAGEMENT LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -31,658 | -100.0% | Q1 2026 | May 15, 2026 |
| PEAK6 LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -26,600 | -100.0% | Q1 2026 | May 13, 2026 |
| Lighthouse Investment Partners, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -26,340 | -100.0% | Q1 2026 | May 14, 2026 |
| SUMMIT SECURITIES GROUP LLC | History | Closed out | 0 | 0 | — | 0.02% | — | -23,000 | -100.0% | Q1 2026 | Apr 30, 2026 |
| Virtu Financial LLC | History | Closed out | 0 | 0 | — | 0.01% | — | -21,688 | -100.0% | Q1 2026 | May 14, 2026 |
| LANDSCAPE CAPITAL MANAGEMENT, L.L.C. | History | Closed out | 0 | 0 | — | 0.01% | — | -17,121 | -100.0% | Q1 2026 | May 12, 2026 |
| Alpine Global Management, LLC | History | Closed out | 0 | 0 | — | 0.02% | — | -16,252 | -100.0% | Q1 2026 | May 15, 2026 |
| Marex Group plc | History | Closed out | 0 | 0 | — | 0.0% | — | -12,000 | -100.0% | Q1 2026 | May 13, 2026 |
| Grantham, Mayo, Van Otterloo & Co. LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -11,475 | -100.0% | Q1 2026 | May 14, 2026 |
| Tower Research Capital LLC (TRC) | History | Reduced | 103 | 0 | — | 0.0% | — | -1,577 | -93.87% | Q1 2026 | May 15, 2026 |
| Aster Capital Management (DIFC) Ltd | History | Closed out | 0 | 0 | — | 0.0% | — | -1,340 | -100.0% | Q1 2026 | May 13, 2026 |
| Davidson Capital Management Inc. | History | Closed out | 0 | 0 | — | 0.0% | — | -182 | -100.0% | Q1 2026 | Apr 14, 2026 |
| FLAGSHIP HARBOR ADVISORS, LLC | History | Closed out | 0 | 0 | — | — | — | -140 | -100.0% | Q1 2026 | Apr 28, 2026 |
| FMR LLC | History | Closed out | 0 | 0 | — | — | — | -100 | -100.0% | Q1 2026 | May 15, 2026 |
| DB Fitzpatrick & Co, Inc | History | Added to | 150 | 0 | — | — | — | +80 | 114.29% | Q1 2026 | Apr 27, 2026 |
| Signature Resources Capital Management, LLC | History | New | 70 | 0 | — | — | — | +70 | New | Q1 2026 | May 01, 2026 |
| Triumph Capital Management | History | Closed out | 0 | 0 | — | — | — | -45 | -100.0% | Q1 2026 | May 13, 2026 |
| Redwood Park Advisors LLC | History | Added to | 87 | 0 | — | — | — | +42 | 93.33% | Q1 2026 | May 04, 2026 |
| CoreCap Advisors, LLC | History | No change | 7 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | Apr 07, 2026 |
| Root Financial Partners, LLC | History | No change | 50 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | Apr 24, 2026 |