Terrestrial Energy Inc. /DE/

IMSRNASDAQ

$3.78-0.05 (-1.31%)as of Oct 2, 2026

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

Terrestrial Energy Inc. /DE/ price and activity chart data

Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (-77.6%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
Vanguard Capital Management LLC	4.13%	$24.2M	0.00%	Not reported
Exchange Traded Concepts, LLC	2.61%	$15.3M	0.07%	Add 3.30%
UBS Group AG	2.14%	$12.5M	0.00%	Not reported
BlackRock, Inc.	1.30%	$7.61M	0.00%	Not reported
JPMorgan Chase & Co	1.17%	$6.78M	0.00%	Not reported
Geode Capital Management, LLC	0.84%	$4.92M	0.00%	Not reported
D. E. Shaw & Co., Inc.	0.81%	$4.73M	0.00%	Not reported
Hudson Bay Capital Management LP	0.71%	$4.17M	0.01%	Not reported
Pacer Advisors, Inc.	0.69%	$4.07M	0.01%	New Not reported
Susquehanna International Group, LLP	0.69%	$4.05M	0.00%	Not reported
WINTON GROUP Ltd	0.61%	$3.57M	0.12%	Not reported
Morgan Stanley	0.50%	$2.92M	0.00%	Not reported
Verition Fund Management LLC	0.45%	$2.65M	0.01%	Not reported
Vanguard Fiduciary Trust Co	0.44%	$2.59M	0.00%	Not reported
Vennlight Capital Management, LP	0.43%	$2.5M	1.68%	Reduce 38.66%
State Street Corp	0.42%	$2.45M	0.00%	Not reported
Charles Schwab Investment Management Inc	0.40%	$2.36M	0.00%	Not reported
Highbridge Capital Management LLC	0.30%	$1.71M	0.04%	New Not reported
Magnetar Financial LLC	0.30%	$737K	0.01%	Not reported
Jane Street Group, LLC	0.29%	$1.7M	0.00%	Not reported
Alyeska Investment Group, L.P.	0.27%	$1.57M	0.00%	Not reported
Renaissance Technologies LLC	0.22%	$1.3M	0.00%	Not reported
Creek Drive Management Group LLC	0.21%	$1.24M	0.60%	Reduce 46.97%
CastleKnight Management LP	0.20%	$1.17M	0.02%	Add 172.49%
FNY Investment Advisers, LLC	0.18%	$1.07M	0.39%	Not reported
Shay Capital LLC	0.16%	$953K	0.06%	Not reported
Northern Trust Corp	0.15%	$896K	0.00%	Not reported
Periscope Capital Inc.	0.15%	$730K	0.06%	Not reported
Harraden Circle Investments, LLC	0.15%	$864K	0.11%	Not reported
Commonwealth Equity Services, LLC	0.13%	$784K	0.00%	Not reported
Toronto Dominion Bank	0.13%	$779K	0.00%	Not reported
Millennium Management LLC	0.12%	$680K	0.00%	Not reported
XTX Topco Ltd	0.11%	$670K	0.01%	Not reported
Mount Lucas Management LP	0.11%	$658K	0.23%	Add 80.58%
Aquatic Capital Management LLC	0.11%	$630K	0.02%	Not reported
Sona Asset Management (Us) LLC	0.10%	$606K	0.01%	Not reported
Squarepoint Ops LLC	0.10%	$605K	0.00%	Not reported
Voloridge Investment Management, LLC	0.10%	$590K	0.00%	New Not reported
Engineers Gate Manager LP	0.10%	$583K	0.01%	Not reported
Tiemann Investment Advisors, LLC	0.09%	$538K	0.19%	Not reported
Moore Capital Management, LP	0.09%	$531K	0.01%	Not reported
IMC-Chicago, LLC	0.09%	$531K	0.00%	Add 254.45%
Parallax Volatility Advisers, L.P.	0.08%	$485K	0.00%	Not reported
AQR Capital Management LLC	0.07%	$423K	0.00%	Not reported
Goldman Sachs Group Inc	0.07%	$421K	0.00%	Not reported
Swiss National Bank	0.07%	$401K	0.00%	Not reported
Balyasny Asset Management L.P.	0.07%	$400K	0.00%	Not reported
Allstate Corp	0.06%	$355K	0.00%	New Not reported
MMCAP International Inc. SPC	0.05%	$313K	0.03%	Not reported
LPL Financial LLC	0.05%	$300K	0.00%	Not reported

50 of 100 holders

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