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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| CITADEL ADVISORS LLC | History | Added to | 2,413,008 | 14,743 | 0.0% | 0.0% | 1 | +1,072,887 | 80.06% | Q4 2025 | Feb 17, 2026 |
| VANGUARD GROUP INC | History | New | 1,849,446 | 11,300 | 0.0% | — | 2 | +1,849,446 | New | Q4 2025 | Jan 29, 2026 |
| BALYASNY ASSET MANAGEMENT L.P. | History | Added to | 1,400,953 | 8,559 | 0.01% | 0.02% | 3 | +536,690 | 62.1% | Q4 2025 | Feb 17, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Added to | 1,321,532 | 8,074 | 0.0% | 0.0% | 4 | +121,501 | 10.12% | Q4 2025 | Feb 17, 2026 |
| JPMORGAN CHASE & CO | History | Added to | 1,170,087 | 7,149 | 0.0% | 0.0% | 5 | +1,117,141 | 2109.96% | Q4 2025 | Feb 11, 2026 |
| BlackRock, Inc. | History | New | 1,092,501 | 6,675 | 0.0% | — | 6 | +1,092,501 | New | Q4 2025 | Feb 12, 2026 |
| D. E. Shaw & Co., Inc. | History | Reduced | 1,079,546 | 6,596 | 0.0% | 0.01% | 7 | -12,949 | -1.19% | Q4 2025 | Feb 17, 2026 |
| Vennlight Capital Management, LP | History | Added to | 1,077,500 | 6,583 | 6.97% | 10.68% | 8 | +577,500 | 115.5% | Q4 2025 | Feb 17, 2026 |
| Senator Investment Group LP | History | New | 900,000 | 5,499 | 0.22% | — | 9 | +900,000 | New | Q4 2025 | Feb 13, 2026 |
| Hudson Bay Capital Management LP | History | New | 836,038 | 5,108 | 0.02% | — | 10 | +836,038 | New | Q4 2025 | Feb 13, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Added to | 796,327 | 4,868 | 0.0% | 0.0% | 11 | +733,181 | 1161.09% | Q4 2025 | Feb 09, 2026 |
| Verition Fund Management LLC | History | Added to | 753,803 | 4,605 | 0.02% | 0.01% | 12 | +627,658 | 497.57% | Q4 2025 | Feb 13, 2026 |
| MMCAP International Inc. SPC | History | New | 750,000 | 4,582 | 0.46% | — | 13 | +750,000 | New | Q4 2025 | Feb 09, 2026 |
| Alyeska Investment Group, L.P. | History | Added to | 722,000 | 4,383 | 0.01% | 0.01% | 14 | +477,328 | 195.09% | Q4 2025 | Feb 13, 2026 |
| WINTON GROUP Ltd | History | New | 646,190 | 3,948 | 0.14% | — | 15 | +646,190 | New | Q4 2025 | Feb 11, 2026 |
| LMR Partners LLP | History | Reduced | 588,214 | 3,593 | 0.01% | 0.05% | 16 | -137,053 | -18.9% | Q4 2025 | Feb 17, 2026 |
| HBK INVESTMENTS L P | History | New | 550,000 | 3,360 | 0.03% | — | 17 | +550,000 | New | Q4 2025 | Feb 17, 2026 |
| CANTOR FITZGERALD, L. P. | History | Added to | 550,000 | 3,360 | 0.05% | 0.05% | 18 | +208,672 | 61.14% | Q4 2025 | Feb 17, 2026 |
| JANE STREET GROUP, LLC | History | Added to | 524,613 | 3,205 | 0.0% | 0.0% | 19 | +155,523 | 42.14% | Q4 2025 | Feb 12, 2026 |
| UBS Group AG | History | Added to | 512,644 | 3,132 | 0.0% | 0.0% | 20 | +473,398 | 1206.23% | Q4 2025 | Jan 29, 2026 |
| Galaxy Group Investments LLC | History | Added to | 500,000 | 3,055 | 0.36% | 0.09% | 21 | +400,000 | 400.0% | Q4 2025 | Mar 23, 2026 |
| Shay Capital LLC | History | Added to | 442,363 | 2,702 | 0.28% | 0.44% | 22 | +130,217 | 41.72% | Q4 2025 | Feb 17, 2026 |
| Caption Management, LLC | History | New | 418,800 | 2,558 | 0.02% | — | 23 | +418,800 | New | Q4 2025 | Feb 17, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | History | New | 410,877 | 2,510 | 0.0% | — | 24 | +410,877 | New | Q4 2025 | Feb 13, 2026 |
| STATE STREET CORP | History | New | 326,700 | 1,996 | 0.0% | — | 25 | +326,700 | New | Q4 2025 | Feb 13, 2026 |
| GOLDMAN SACHS GROUP INC | History | New | 281,764 | 1,721 | 0.0% | — | 26 | +281,764 | New | Q4 2025 | Mar 25, 2026 |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC | History | New | 244,000 | 1,490 | 0.05% | — | 27 | +244,000 | New | Q4 2025 | Feb 11, 2026 |
| DANSKE BANK A/S | History | New | 583,401 | 1,389 | 0.0% | — | 28 | +583,401 | New | Q4 2025 | Feb 02, 2026 |
| Walleye Capital LLC | History | New | 210,581 | 1,286 | 0.0% | — | 29 | +210,581 | New | Q4 2025 | Feb 13, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | New | 172,800 | 1,055 | 0.0% | — | 30 | +172,800 | New | Q4 2025 | Feb 12, 2026 |
| NORTHERN TRUST CORP | History | New | 156,377 | 955 | 0.0% | — | 31 | +156,377 | New | Q4 2025 | Feb 17, 2026 |
| MORGAN STANLEY | History | Added to | 122,307 | 747 | 0.0% | 0.0% | 32 | +50,887 | 71.25% | Q4 2025 | Feb 13, 2026 |
| Harraden Circle Investments, LLC | History | New | 122,000 | 745 | 0.14% | — | 33 | +122,000 | New | Q4 2025 | Feb 13, 2026 |
| TUDOR INVESTMENT CORP ET AL | History | New | 103,000 | 629 | 0.0% | — | 34 | +103,000 | New | Q4 2025 | Feb 17, 2026 |
| WELLS FARGO & COMPANY/MN | History | New | 100,000 | 611 | 0.0% | — | 35 | +100,000 | New | Q4 2025 | Feb 13, 2026 |
| SONA ASSET MANAGEMENT (US) LLC | History | No change | 100,000 | 611 | 0.01% | 0.04% | 36 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| XTX Topco Ltd | History | New | 97,218 | 594 | 0.02% | — | 37 | +97,218 | New | Q4 2025 | Feb 17, 2026 |
| PERISCOPE CAPITAL INC. | History | New | 122,000 | 580 | 0.07% | — | 38 | +122,000 | New | Q4 2025 | Feb 10, 2026 |
| FNY Investment Advisers, LLC | History | Added to | 90,050 | 549 | 0.15% | 0.1% | 39 | +71,530 | 386.23% | Q4 2025 | Jan 16, 2026 |
| Squarepoint Ops LLC | History | New | 89,207 | 545 | 0.0% | — | 40 | +89,207 | New | Q4 2025 | Feb 13, 2026 |
| Stoic Point Capital Management LLC | History | New | 84,000 | 513 | 0.43% | — | 41 | +84,000 | New | Q4 2025 | Feb 17, 2026 |
| SkyView Investment Advisors, LLC | History | New | 83,844 | 512 | 0.06% | — | 42 | +83,844 | New | Q4 2025 | Feb 18, 2026 |
| Jump Financial, LLC | History | New | 77,900 | 475 | 0.01% | — | 43 | +77,900 | New | Q4 2025 | Feb 17, 2026 |
| TIEMANN INVESTMENT ADVISORS, LLC | History | New | 75,995 | 464 | 0.18% | — | 44 | +75,995 | New | Q4 2025 | Feb 13, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Added to | 67,729 | 413 | 0.0% | 0.0% | 45 | +40,177 | 145.82% | Q4 2025 | Feb 17, 2026 |
| Massar Capital Management, LP | History | No change | 65,000 | 397 | 0.04% | 0.14% | 46 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| CastleKnight Management LP | History | Added to | 60,700 | 370 | 0.01% | 0.01% | 47 | +18,800 | 44.87% | Q4 2025 | Feb 17, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | New | 57,712 | 352 | 0.0% | — | 48 | +57,712 | New | Q4 2025 | Feb 17, 2026 |
| COMMONWEALTH EQUITY SERVICES, LLC | History | Added to | 54,023 | 330 | 0.0% | 0.0% | 49 | +21,452 | 65.86% | Q4 2025 | Feb 12, 2026 |
| Engineers Gate Manager LP | History | New | 51,654 | 315 | 0.0% | — | 50 | +51,654 | New | Q4 2025 | Feb 17, 2026 |
| MOORE CAPITAL MANAGEMENT, LP | History | Reduced | 50,000 | 305 | 0.0% | 0.04% | 51 | -125,000 | -71.43% | Q4 2025 | Feb 17, 2026 |
| IMC-Chicago, LLC | History | New | 49,100 | 300 | 0.0% | — | 52 | +49,100 | New | Q4 2025 | Jan 29, 2026 |
| BARCLAYS PLC | History | New | 45,275 | 276 | 0.0% | — | 53 | +45,275 | New | Q4 2025 | Feb 13, 2026 |
| SIMON QUICK ADVISORS, LLC | History | New | 45,000 | 274 | 0.01% | — | 54 | +45,000 | New | Q4 2025 | Jan 29, 2026 |
| Mount Lucas Management LP | History | New | 40,000 | 244 | 0.1% | — | 55 | +40,000 | New | Q4 2025 | Feb 05, 2026 |
| ROYAL BANK OF CANADA | History | New | 32,992 | 202 | 0.0% | — | 56 | +32,992 | New | Q4 2025 | Feb 17, 2026 |
| MILLENNIUM MANAGEMENT LLC | History | Reduced | 31,658 | 193 | 0.0% | 0.0% | 57 | -597,705 | -94.97% | Q4 2025 | Feb 17, 2026 |
| MARSHALL WACE, LLP | History | New | 30,893 | 188 | 0.0% | — | 58 | +30,893 | New | Q4 2025 | Feb 13, 2026 |
| T3 Companies, LLC | History | New | 64,000 | 185 | 0.23% | — | 59 | +64,000 | New | Q4 2025 | Feb 11, 2026 |
| PEAK6 LLC | History | Reduced | 26,600 | 162 | 0.0% | 0.0% | 60 | -85,289 | -76.23% | Q4 2025 | Mar 12, 2026 |
| Brevan Howard Capital Management LP | History | New | 26,400 | 161 | 0.0% | — | 61 | +26,400 | New | Q4 2025 | Feb 17, 2026 |
| Lighthouse Investment Partners, LLC | History | New | 26,340 | 160 | 0.0% | — | 62 | +26,340 | New | Q4 2025 | Feb 17, 2026 |
| Magnetar Financial LLC | History | Reduced | 24,885 | 152 | 0.0% | 0.01% | 64 | -117,419 | -82.51% | Q4 2025 | Feb 17, 2026 |
| TORONTO DOMINION BANK | History | New | 25,000 | 152 | 0.0% | — | 63 | +25,000 | New | Q4 2025 | Feb 17, 2026 |
| SUMMIT SECURITIES GROUP LLC | History | New | 23,000 | 140 | 0.02% | — | 65 | +23,000 | New | Q4 2025 | Feb 17, 2026 |
| Virtu Financial LLC | History | New | 21,688 | 133 | 0.01% | — | 66 | +21,688 | New | Q4 2025 | Feb 23, 2026 |
| Schonfeld Strategic Advisors LLC | History | New | 17,828 | 108 | 0.0% | — | 67 | +17,828 | New | Q4 2025 | Feb 17, 2026 |
| LANDSCAPE CAPITAL MANAGEMENT, L.L.C. | History | New | 17,121 | 104 | 0.01% | — | 68 | +17,121 | New | Q4 2025 | Feb 13, 2026 |
| NATIONAL BANK OF CANADA /FI/ | History | Added to | 17,000 | 103 | 0.0% | 0.0% | 69 | +302 | 1.81% | Q4 2025 | Feb 17, 2026 |
| Alpine Global Management, LLC | History | Reduced | 16,252 | 99 | 0.02% | 0.1% | 70 | -13,048 | -44.53% | Q4 2025 | Feb 26, 2026 |
| CITIGROUP INC | History | New | 12,319 | 75 | 0.0% | — | 71 | +12,319 | New | Q4 2025 | Feb 13, 2026 |
| Marex Group plc | History | New | 12,000 | 73 | 0.0% | — | 72 | +12,000 | New | Q4 2025 | Feb 12, 2026 |
| GROUP ONE TRADING LLC | History | Added to | 11,800 | 72 | 0.0% | 0.0% | 73 | +11,224 | 1948.61% | Q4 2025 | Feb 12, 2026 |
| Grantham, Mayo, Van Otterloo & Co. LLC | History | New | 11,475 | 70 | 0.0% | — | 74 | +11,475 | New | Q4 2025 | Feb 17, 2026 |
| SIMPLEX TRADING, LLC | History | Reduced | 8,300 | 50 | 0.0% | 0.0% | 75 | -40,214 | -82.89% | Q4 2025 | Feb 11, 2026 |
| Federation des caisses Desjardins du Quebec | History | Reduced | 4,350 | 26 | 0.0% | 0.0% | 76 | -900 | -17.14% | Q4 2025 | Feb 12, 2026 |
| OSAIC HOLDINGS, INC. | History | Added to | 2,431 | 14 | 0.0% | 0.0% | 77 | +2,121 | 684.19% | Q4 2025 | Feb 17, 2026 |
| Anchor Investment Management, LLC | History | No change | 2,100 | 12 | 0.0% | 0.0% | 78 | 0 | 0.0% | Q4 2025 | Feb 26, 2026 |
| Tower Research Capital LLC (TRC) | History | New | 1,680 | 10 | 0.0% | — | 79 | +1,680 | New | Q4 2025 | Feb 17, 2026 |
| Aster Capital Management (DIFC) Ltd | History | New | 1,340 | 8 | 0.0% | — | 80 | +1,340 | New | Q4 2025 | Feb 17, 2026 |
| Cherry Tree Wealth Management, LLC | History | New | 692 | 4 | 0.0% | — | 81 | +692 | New | Q4 2025 | Feb 10, 2026 |
| TUCKER ASSET MANAGEMENT LLC | History | New | 371 | 2 | 0.0% | — | 82 | +371 | New | Q4 2025 | Feb 05, 2026 |
| Farther Finance Advisors, LLC | History | New | 248 | 1 | 0.0% | — | 85 | +248 | New | Q4 2025 | Jan 23, 2026 |
| Davidson Capital Management Inc. | History | New | 182 | 1 | 0.0% | — | 84 | +182 | New | Q4 2025 | Jan 28, 2026 |
| Steward Partners Investment Advisory, LLC | History | No change | 200 | 1 | 0.0% | 0.0% | 83 | 0 | 0.0% | Q4 2025 | Feb 12, 2026 |
| DAVIDSON KEMPNER CAPITAL MANAGEMENT LP | History | Closed out | 0 | 0 | — | 1.55% | — | -270,540 | -100.0% | Q3 2025 | Feb 17, 2026 |
| Sourcerock Group LLC | History | Closed out | 0 | 0 | — | 0.29% | — | -257,900 | -100.0% | Q3 2025 | Nov 14, 2025 |
| SIR Capital Management, L.P. | History | Closed out | 0 | 0 | — | 0.32% | — | -217,600 | -100.0% | Q3 2025 | Nov 14, 2025 |
| LINDEN ADVISORS LP | History | Closed out | 0 | 0 | — | 0.02% | — | -209,426 | -100.0% | Q3 2025 | Nov 14, 2025 |
| HRT FINANCIAL LP | History | Closed out | 0 | 0 | — | 0.01% | — | -204,611 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Waratah Capital Advisors Ltd. | History | Closed out | 0 | 0 | — | 0.06% | — | -198,188 | -100.0% | Q3 2025 | Nov 10, 2025 |
| BERKLEY W R CORP | History | Closed out | 0 | 0 | — | 0.15% | — | -160,672 | -100.0% | Q3 2025 | Nov 14, 2025 |
| WHITEBOX ADVISORS LLC | History | Closed out | 0 | 0 | — | 0.03% | — | -115,000 | -100.0% | Q3 2025 | Nov 14, 2025 |
| WEXFORD CAPITAL LP | History | Closed out | 0 | 0 | — | 0.24% | — | -102,712 | -100.0% | Q3 2025 | Nov 14, 2025 |
| HITE Hedge Asset Management LLC | History | Closed out | 0 | 0 | — | 0.09% | — | -102,338 | -100.0% | Q3 2025 | Nov 13, 2025 |
| DELTEC ASSET MANAGEMENT LLC | History | Closed out | 0 | 0 | — | 0.2% | — | -75,000 | -100.0% | Q3 2025 | Oct 24, 2025 |
| Arosa Capital Management LP | History | Closed out | 0 | 0 | — | 0.23% | — | -65,000 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Jain Global LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -63,363 | -100.0% | Q3 2025 | Nov 14, 2025 |
| BOOTHBAY FUND MANAGEMENT, LLC | History | Closed out | 0 | 0 | — | 0.01% | — | -58,698 | -100.0% | Q3 2025 | Nov 14, 2025 |
| PICTON MAHONEY ASSET MANAGEMENT | History | Closed out | 0 | 0 | — | 0.01% | — | -42,081 | -100.0% | Q3 2025 | Nov 12, 2025 |
| MYDA Advisors LLC | History | Closed out | 0 | 0 | — | 0.11% | — | -30,000 | -100.0% | Q3 2025 | Nov 13, 2025 |
| NATIONS FINANCIAL GROUP INC, /IA/ /ADV | History | Closed out | 0 | 0 | — | 0.03% | — | -27,047 | -100.0% | Q3 2025 | Oct 28, 2025 |
| Private Advisor Group, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -22,841 | -100.0% | Q3 2025 | Nov 13, 2025 |
| Tuttle Capital Management, LLC | History | Closed out | 0 | 0 | — | 1.09% | — | -17,500 | -100.0% | Q3 2025 | Oct 20, 2025 |
| EHP Funds Inc. | History | Closed out | 0 | 0 | — | 0.2% | — | -13,895 | -100.0% | Q3 2025 | Nov 13, 2025 |
| Maven Securities LTD | History | Closed out | 0 | 0 | — | 0.0% | — | -12,200 | -100.0% | Q3 2025 | Nov 20, 2025 |
| RAYMOND JAMES FINANCIAL INC | History | Closed out | 0 | 0 | — | 0.0% | — | -10,809 | -100.0% | Q3 2025 | Nov 14, 2025 |
| BNP PARIBAS FINANCIAL MARKETS | History | Closed out | 0 | 0 | — | 0.0% | — | -10,000 | -100.0% | Q3 2025 | Nov 13, 2025 |
| Soltis Investment Advisors LLC | History | Closed out | 0 | 0 | — | 0.01% | — | -10,000 | -100.0% | Q3 2025 | Nov 12, 2025 |
| North Capital, Inc. | History | Closed out | 0 | 0 | — | 0.13% | — | -10,000 | -100.0% | Q3 2025 | Oct 09, 2025 |
| CoreCap Advisors, LLC | History | Reduced | 7 | 0 | — | 0.0% | — | -993 | -99.3% | Q4 2025 | Jan 13, 2026 |
| FLAGSHIP HARBOR ADVISORS, LLC | History | New | 140 | 0 | — | — | — | +140 | New | Q4 2025 | Jan 21, 2026 |
| Larson Financial Group LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -104 | -100.0% | Q3 2025 | Nov 14, 2025 |
| FMR LLC | History | New | 100 | 0 | — | — | — | +100 | New | Q4 2025 | Feb 17, 2026 |
| DB Fitzpatrick & Co, Inc | History | New | 70 | 0 | — | — | — | +70 | New | Q4 2025 | Jan 15, 2026 |
| Root Financial Partners, LLC | History | New | 50 | 0 | — | — | — | +50 | New | Q4 2025 | Feb 10, 2026 |
| Koesten, Hirschmann & Crabtree, INC. | History | Closed out | 0 | 0 | — | — | — | -50 | -100.0% | Q3 2025 | Nov 05, 2025 |
| Triumph Capital Management | History | New | 45 | 0 | — | — | — | +45 | New | Q4 2025 | Feb 12, 2026 |
| Wealthspire Advisors, LLC | History | Closed out | 0 | 0 | — | — | — | -20 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Redwood Park Advisors LLC | History | Added to | 45 | 0 | — | — | — | +1 | 2.27% | Q4 2025 | Feb 17, 2026 |