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Terrestrial Energy Inc (IMSR)

CUSIP: 881454102 | NYSE | 160 institutional holders

Quarters

Q3 2026Q2 2026Q1 2026Q4 2025
CompareDetailedHistoricalFundsOptions13D/13GPeersTargetingTrading SummaryProfile

Beneficial Ownership — 13D / 13G

Full history →

5%+ stakes reported outside the quarterly cycle. A 13D is due within five business days of the event below, so these figures lead the holders table until the filer's next 13F catches up to them.

HolderShares% of ClassChangeEvent Datevs 13F
13DSimon Irish13,586,44512.8%New 5%+ stakeOct 28, 2025No 13F filer matched
13DDavid LeBlanc11,400,4109.7%New 5%+ stakeOct 28, 2025

Institutional Holders — Q3 2026

Geode Capital Management, LLC681,605
0.0% of portfolio›$2.7M
Exchange Traded Concepts, LLC616,430
0.0% of portfolio›$2.4M
FNY Investment Advisers, LLC179,235
0.0% of portfolio›$697
Citigroup Inc146,133
0.0% of portfolio›$568.5K
Periscope Capital Inc.122,000
0.0% of portfolio›$440.4K
Commonwealth Equity Services, LLC120,793
0.0% of portfolio›$469.9K
Imc-Chicago, LLC73,178
0.0% of portfolio›$284.7K
LPL Financial LLC43,434
0.0% of portfolio›$169.0K
Simon Quick Advisors, LLC40,000
0.0% of portfolio›$155.6K
Barclays PLC34,494
0.0% of portfolio›$134.2K
Themes Management Co LLC19,660
0.1% of portfolio›$76.5K
StoneX Group Inc.17,294
0.0% of portfolio›$86.7K
Bank of New York Mellon Corp16,911
0.0% of portfolio›$65.8K
Valeo Financial Advisors, LLC15,000
0.0% of portfolio›$58.4K
Alps Advisors Inc11,945
0.0% of portfolio›$46.5K
J. Safra Sarasin Holding AG11,520
0.0% of portfolio›$44.8K
Compound Planning, Inc.10,655
0.0% of portfolio›$41.4K
Cornerstone Advisory, LLC10,000
0.0% of portfolio›$38.9K
US Bancorp \de\4,500
0.0% of portfolio›$17.5K
Caitong International Asset Management Co., Ltd3,344
0.0% of portfolio›$13.0K
GGM Financial LLC1,000
0.0% of portfolio›$3.9K
Cherry Tree Wealth Management, LLC692
0.0% of portfolio›$2.7K
Farther Finance Advisors, LLC391
0.0% of portfolio›$1.5K
Parallel Advisors, LLC280
0.0% of portfolio›$1.1K
Essential Partners LLC279
0.0% of portfolio›$1.1K
SJS Investment Consulting Inc.176
0.0% of portfolio›$685
Latitude Advisors, LLC135
0.0% of portfolio›$525
Redwood Park Advisors LLC116
0.0% of portfolio›$452
EverSource Wealth Advisors, LLC74
0.0% of portfolio›$288
Allworth Financial LP72
0.0% of portfolio›$510
Ascentis Wealth Management, LLC42
0.0% of portfolio›$163
IFP Advisors, Inc38
0.0% of portfolio›$148
Clearstead Advisors, LLC24
0.0% of portfolio›$94
Root Financial Partners, LLC9
0.0% of portfolio›$35
StyleTurnoverLocationFiled
Geode Capital Management, LLC
681,605$2.7M0.0%IndexVery LowBoston, MA2026-11-06
Exchange Traded Concepts, LLC
616,430$2.4M0.0%GrowthMediumOklahoma City, OK2026-10-28
FNY Investment Advisers, LLC
179,235$6970.0%GrowthVery HighNew York, NY2026-10-16
Citigroup Inc
146,133$568.5K0.0%CoreMediumNew York, NY2026-11-04
Periscope Capital Inc.
122,000$440.4K0.0%GARPHighToronto, Australia2026-11-06
Commonwealth Equity Services, LLC
120,793$469.9K0.0%ETFLowWaltham, MA2026-11-02
Imc-Chicago, LLC
73,178$284.7K0.0%GARPVery HighChicago, IL2026-11-05
LPL Financial LLC
43,434$169.0K0.0%IndexVery LowFort Mill, SC2026-11-06
Simon Quick Advisors, LLC
40,000$155.6K0.0%ETFLowMorristown, NJ2026-10-26
Barclays PLC
34,494$134.2K0.0%CoreMediumLondon, United Kingdom2026-11-06
Themes Management Co LLC
19,660$76.5K0.1%GARPMediumGreenwich, CT2026-10-29
StoneX Group Inc.
17,294$86.7K0.0%ETFMediumNew York, NY2026-11-03
Bank of New York Mellon Corp
16,911$65.8K0.0%CoreLowNew York, NY2026-11-05
Valeo Financial Advisors, LLC
15,000$58.4K0.0%ETFLowCarmel, IN2026-10-08
Alps Advisors Inc
11,945$46.5K0.0%YieldLowDenver, CO2026-11-03
J. Safra Sarasin Holding AG
11,520$44.8K0.0%CoreMediumBasel, Switzerland2026-10-26
Compound Planning, Inc.
10,655$41.4K0.0%CoreLowNew York, NY2026-11-05
Cornerstone Advisory, LLC
10,000$38.9K0.0%ETFVery LowHunt Valley, MD2026-11-06
US Bancorp \de\
4,500$17.5K0.0%IndexLowMinneapolis, MN2026-11-05
Caitong International Asset Management Co., Ltd
3,344$13.0K0.0%GrowthVery HighHong Kong, South Korea2026-10-29
GGM Financial LLC
1,000$3.9K0.0%ETFMediumColumbus, OH2026-11-05
Cherry Tree Wealth Management, LLC
692$2.7K0.0%ETFVery LowMinnetonka, MN2026-10-15
Farther Finance Advisors, LLC
391$1.5K0.0%IndexLowSan Francisco, CA2026-10-08
Parallel Advisors, LLC
280$1.1K0.0%IndexLowSan Francisco, CA2026-11-03
Essential Partners LLC
279$1.1K0.0%ValueMediumRancho Santa Fe, CA2026-10-14
SJS Investment Consulting Inc.
176$6850.0%ETFVery LowSylvania, OH2026-10-26
Latitude Advisors, LLC
135$5250.0%ETFLowYorkville, IL2026-10-27
Redwood Park Advisors LLC
116$4520.0%ETFVery LowRedwood City, CA2026-11-02
EverSource Wealth Advisors, LLC
74$2880.0%CoreMediumBirmingham, AL2026-11-04
Allworth Financial LP
72$5100.0%IndexLowFolsom, CA2026-11-06
Ascentis Wealth Management, LLC
42$1630.0%Agg GrowthLowDallas, TX2026-11-03
IFP Advisors, Inc
38$1480.0%GrowthLowTampa, FL2026-10-16
Clearstead Advisors, LLC
24$940.0%ETFLowCleveland, OH2026-11-06
Root Financial Partners, LLC
9$350.0%ETFMediumEncinitas, CA2026-10-21
No 13F filer matched
13DSimon Irish13,586,445
12.8% of class · Oct 28, 2025New 5%+ stake
No 13F filer matched
13DDavid LeBlanc11,400,410
9.7% of class · Oct 28, 2025New 5%+ stake
No 13F filer matched