Terrestrial Energy Inc. /DE/ - IMSR

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q1 2026 · Compare: Q4 2025
13D/13G major owners: Ownership tab.
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