Terrestrial EnergyIMSR

13F holders, Q4 2025 (December 31)
82holders
5famous investors
$6.10avg. 13F price*

At the end of Q4 2025, 82 institutions reported holding Terrestrial Energy Inc. (IMSR) in their 13F filings. The largest holders were Citadel Advisors ($12.4M), Vanguard Group Inc. ($11.3M) and Balyasny Asset Management L.P. ($8.6M). 5 famous investors held it, including Ken Griffin (0.0% of Citadel Advisors's portfolio), David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).

Company
Terrestrial Energy Inc.
CUSIP
881454102
Latest filing quarter
Q2 2026

History

Number of 13F holders

050100150 Q4 2025: 82Q4 2025Q1 2026: 88Q1 2026Q2 2026: 110Q2 2026

Total Exit/New Position Q4 2025

InstitutionsTotal Value
New Positions81$130.5M
Exits0$0

Ownership 82 holders

Citadel Advisors 0.01% New 2,029,208 $12.4M
Vanguard Group Inc. 0.00% New 1,849,446 $11.3M
Balyasny Asset Management L.P. 0.02% New 1,400,953 $8.6M
JPMorgan Chase & Co. 0.00% New 1,170,087 $7.1M
BlackRock, Inc. 0.00% New 1,092,501 $6.7M
D. E. Shaw & Co. 0.01% New 1,079,546 $6.6M
Senator Investment Group LP 0.22% New 900,000 $5.5M
Geode Capital Management, LLC 0.00% New 796,327 $4.9M
Verition Fund Management LLC 0.03% New 753,803 $4.6M
MMCAP International Inc. SPC 0.47% New 750,000 $4.6M
Hudson Bay Capital Management LP 0.03% New 736,038 $4.5M
Alyeska Investment Group, L.P. 0.01% New 722,000 $4.4M
WINTON GROUP Ltd 0.14% New 646,190 $3.9M
LMR Partners LLP 0.05% New 588,214 $3.6M
Cantor Fitzgerald, L. P. 0.10% New 550,000 $3.4M
UBS Group AG 0.00% New 512,644 $3.1M
Galaxy Group Investments LLC 0.42% New 500,000 $3.1M
HBK Investments L P 0.04% New 500,000 $3.1M
Charles Schwab Investment Management Inc. 0.00% New 410,877 $2.5M
Susquehanna International Group, LLP 0.00% New 348,532 $2.1M
State Street Corp. 0.00% New 326,700 $2.0M
Jane Street Group, LLC 0.00% New 301,213 $1.8M
Goldman Sachs Group Inc. 0.00% New 281,764 $1.7M
Shay Capital LLC 0.27% New 277,363 $1.7M
Highbridge Capital Management LLC 0.12% New 244,000 $1.5M
Danske Bank A/S 0.00% New 213,401 $1.3M
Walleye Capital LLC 0.01% New 210,581 $1.3M
Renaissance Technologies 0.00% New 172,800 $1.1M
Northern Trust Corp. 0.00% New 156,377 $955K
Morgan Stanley 0.00% New 122,307 $747K
Harraden Circle Investments, LLC 0.15% New 122,000 $745K
Sona Asset Management (us) LLC 0.04% New 100,000 $611K
XTX Topco Ltd 0.02% New 97,218 $594K
Periscope Capital Inc. 0.12% New 122,000 $581K
FNY Investment Advisers, LLC 0.16% New 90,000 $549K
Squarepoint Ops LLC 0.00% New 89,207 $545K
SkyView Investment Advisors, LLC 0.06% New 83,844 $512K
Jump Financial, LLC 0.01% New 77,900 $476K
Tiemann Investment Advisors, LLC 0.18% New 75,995 $464K
Bank of America Corp. 0.00% New 67,729 $414K
Massar Capital Management, LP 0.08% New 65,000 $397K
CastleKnight Management LP 0.02% New 60,700 $371K
Two Sigma Investments, LP 0.00% New 57,712 $353K
Commonwealth Equity Services, LLC 0.00% New 54,023 $330K
Engineers Gate Manager LP 0.00% New 51,654 $316K
Moore Capital Management, LP 0.01% New 50,000 $306K
Barclays PLC 0.00% New 45,275 $277K
Simon Quick Advisors, LLC 0.01% New 45,000 $275K
Mount Lucas Management LP 0.11% New 40,000 $244K
Royal Bank of Canada 0.00% New 32,992 $202K
Millennium Management 0.00% New 31,658 $193K
Marshall Wace, LLP 0.00% New 30,893 $189K
T3 Companies, LLC 0.23% — 28,500 $174K
Brevan Howard Capital Management LP 0.00% New 26,400 $161K
Lighthouse Investment Partners, LLC 0.01% New 26,340 $161K
Toronto Dominion Bank 0.00% New 25,000 $153K
Magnetar Financial LLC 0.00% New 24,885 $152K
Virtu Financial LLC 0.01% New 21,688 $133K
Schonfeld Strategic Advisors LLC 0.00% New 17,828 $109K
Landscape Capital Management, L.L.C. 0.01% New 17,121 $105K
National Bank of Canada 0.00% New 17,000 $104K
Alpine Global Management, LLC 0.02% New 16,252 $99K
Citigroup Inc. 0.00% New 12,319 $75K
Marex Group Ltd 0.00% New 12,000 $73K
Summit Securities Group LLC 0.01% New 11,500 $70K
GMO 0.00% New 11,475 $70K
Federation des caisses Desjardins du Quebec 0.00% New 4,350 $27K
Osaic Holdings, Inc. 0.00% New 2,431 $15K
Anchor Investment Management, LLC 0.00% New 2,100 $13K
Tower Research Capital LLC (TRC) 0.00% New 1,680 $10K
Aster Capital Management (DIFC) Ltd 0.00% New 1,340 $8K
Cherry Tree Wealth Management, LLC 0.00% New 692 $4K
Tucker Asset Management LLC 0.00% New 371 $2K
Farther Finance Advisors, LLC 0.00% New 248 $2K
Steward Partners Investment Advisory, LLC 0.00% New 200 $1K
Davidson Capital Management Inc. 0.00% New 182 $1K
Flagship Harbor Advisors, LLC 0.00% New 140 $855
FMR LLC 0.00% New 100 $611
DB Fitzpatrick & Co, Inc 0.00% New 70 $428
Root Financial Partners, LLC 0.00% New 50 $306
Triumph Capital Management 0.00% New 45 $275
CoreCap Advisors, LLC 0.00% New 7 $43

"% of holder's portfolio" is IMSR's weight in each manager's 13F, not the share of Terrestrial Energy Inc. the manager owns.