Terrestrial Energy IMSR Institutional Ownership

NASDAQ IMSR

$2.84 +0.27 (+10.72%)

At close: Nov 6, 2026 · 4:00 PM EST

Institutions by Trading Activity

112 Institutions

Increased 69 61.6%

Unchanged 21 18.8%

Reduced 22 19.6%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

20.34%

▲+2.73 pp QoQ

Shares Held by Institutions

21.55Mn

of 105.94Mn outstanding

▲+15.59% QoQ

Shares Outstanding

105.94Mn

84.39Mn held outside 13F filers

Institutional Investors

112

filed 13F for Jun 2026

▲+24 vs prior quarter

Net Shares Added (QoQ)

+2.91Mn

accumulated since last quarter

Value of Holdings

$55.38Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Nov 5, 2026

Terrestrial Energy Inc. (NASDAQ:IMSR) appeared in the 13F filings of 112 institutional investors for the quarter ended June 30, 2026.

Their combined stake equaled 20.34% of outstanding shares in Q2 2026, up from 17.61% in Q1 2026.
Total shares held in Terrestrial Energy rose 15.59% versus Q1 2026.
Among the 112 holders of Terrestrial Energy, 69 added to their positions, 22 reduced their stakes and 21 left their positions unchanged.
Combined, institutional investors held 21.55Mn shares of IMSR as of Q2 2026, up 2.91Mn from the prior quarter.
Vanguard Capital Management LLC held the largest position in IMSR at 3.41Mn shares as of June 30, 2026, or 3.22% of shares outstanding.
The largest position increases in IMSR for Q2 2026 were by Vanguard Capital Management LLC (+2.11Mn shares), UBS Group AG (+1.28Mn shares), Susquehanna International Group, LLP (+241.56K shares), Hudson Bay Capital Management LP (+137.01K shares) and Morgan Stanley (+127.27K shares).
On the other side, among holders that kept a position in Terrestrial Energy, the largest reductions in Q2 2026 came from Citadel Advisors LLC (-1.27Mn shares), D. E. Shaw & Co., Inc. (-546.81K shares), Alyeska Investment Group, L.P. (-500K shares), Goldman Sachs Group Inc (-336.81K shares) and Renaissance Technologies LLC (-224.1K shares).
Per Business Quant data, the 10 largest holders of Terrestrial Energy at the end of Q2 2026 were Vanguard Capital Management LLC (3.41Mn shares), Exchange Traded Concepts, LLC (2.16Mn shares), UBS Group AG (1.77Mn shares), HRT Financial LP (1.13Mn shares), BlackRock, Inc. (1.07Mn shares), JPMorgan Chase & Co (966.8K shares), Geode Capital Management, LLC (693.93K shares), LMR Partners LLP (690.7K shares), D. E. Shaw & Co., Inc. (667.97K shares) and Hudson Bay Capital Management LP (589.29K shares).

Form 13F Holdings

112 Institutional Holders

Report period 30 Jun, 2026

Total shares held 21.55Mn

Of outstanding 20.34%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	3,414,196	3.22%	▲2,110,744	+161.93%	$24.17Mn
2	EXCHANGE TRADED CONCEPTS, LLC	0001457320	2,160,074	2.04%	▲68,913	+3.30%	$15.29Mn
3	UBS Group AG	0001610520	1,772,173	1.67%	▲1,278,596	+259.05%	$12.55Mn
4	HRT FINANCIAL LP	0001475597	1,125,849	1.06%	▲1,125,849	0.00%	$7.97K
5	BlackRock, Inc.	0002012383	1,074,524	1.01%	▼46,361	-4.14%	$7.61Mn
6	Jpmorgan Chase & Co	0000019617	966,797	0.91%	▼106,276	-9.90%	$6.78Mn
7	GEODE CAPITAL MANAGEMENT, LLC	0001214717	693,934	0.66%	▲34,546	+5.24%	$4.92Mn
8	LMR Partners LLP	0001578621	690,702	0.65%	0	0.00%	$4.89Mn
9	D. E. Shaw & Co., Inc.	0001009207	667,968	0.63%	▼546,809	-45.01%	$4.73Mn
10	Hudson Bay Capital Management LP	0001393825	589,293	0.56%	▲137,006	+30.29%	$4.17Mn
11	Pacer Advisors, Inc.	0001616667	574,618	0.54%	▲574,618	0.00%	$4.07K
12	SUSQUEHANNA INTERNATIONAL GROUP, LLP	0001446194	571,832	0.54%	▲241,556	+73.14%	$4.05Mn
13	WINTON GROUP Ltd	0001612063	504,000	0.48%	▲7,700	+1.55%	$3.57Mn
14	Morgan Stanley	0000895421	412,815	0.39%	▲127,266	+44.57%	$2.92Mn
15	Verition Fund Management LLC	0001454027	374,958	0.35%	▼70,000	-15.73%	$2.65Mn
16	VANGUARD FIDUCIARY TRUST CO	0000933478	365,772	0.35%	▲65,365	+21.76%	$2.59Mn
17	Vennlight Capital Management, LP	0002013462	353,010	0.33%	▼222,489	-38.66%	$2.50Mn
18	State Street Corp	0000093751	346,696	0.33%	▲1,176	+0.34%	$2.45Mn
19	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0000884546	333,599	0.31%	▼4,392	-1.30%	$2.36Mn
20	HIGHBRIDGE CAPITAL MANAGEMENT LLC	0000919185	244,000	0.23%	▲244,000	0.00%	$1.71Mn

Showing 1 to 20 of 112 holders