Terrestrial Energy Inc. /DE/ - IMSR

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q4 2025 · Compare: Q3 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
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