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IMSR

Terrestrial Energy
IMSR

65 hedge funds and large institutions have $210M invested in Terrestrial Energy in 2025 Q2 according to their latest regulatory filings, with 29 funds opening new positions, 7 increasing their positions, 23 reducing their positions, and 9 closing their positions.

New
Increased
Maintained
Reduced
Closed

222% more first-time investments, than exits

New positions opened: 29 | Existing positions closed: 9

44% more funds holding

Funds holding: 45 → 65 (+20)

2% less capital invested

Capital invested by funds: $213M → $210M (-$3.8M)

6.29% less ownership

Funds ownership: 88.01% → 81.72% (-6.3%)

70% less repeat investments, than reductions

Existing positions increased: 7 | Existing positions reduced: 23

Holders
65
Holders Change
+20
Holders Change %
+44.44%
% of All Funds
0.86%
Holding in Top 10
2
Holding in Top 10 Change
+2
Holding in Top 10 Change %
% of All Funds
0.03%
New
29
Increased
7
Reduced
23
Closed
9
Calls
$360K
Puts
–
Net Calls
+$360K
Net Calls Change
+$360K

Top Buyers

Rank Fund Capital Flow
1
VCM
Vennlight Capital Management
Connecticut
+$11.4M
2
ACM
Arosa Capital Management
Florida
+$6.23M
3
SC
Shay Capital
New York
+$6.1M
4
Balyasny Asset Management
Balyasny Asset Management
Illinois
+$5.34M
5
CF
Cantor Fitzgerald
New York
+$5.19M

Top Sellers

Rank Fund Capital Flow
1
AA
AQR Arbitrage
Connecticut
-$13.6M
2
ECA
Encompass Capital Advisors
New York
-$10M
3
PMAM
Picton Mahoney Asset Management
Ontario, Canada
-$9.32M
4
FTCM
First Trust Capital Management
Illinois
-$7.54M
5
MF
Magnetar Financial
Illinois
-$6.25M
Name Holding Trade Value Shares
Change 		Change in
Stake
Millennium Management
26
Millennium Management
New York
$2.22M – – –
SM
27
Scoggin Management
New York
$2.22M +$2.22M +200,000 New
WCMNY
28
Westchester Capital Management (New York)
New York
$2.22M -$5.24M -470,790 -70%
JGC
29
J. Goldman & Co
New York
$1.96M +$1.96M +176,249 New
GAM
30
Gritstone Asset Management
Maryland
$1.93M -$556K -50,000 -22%
Verition Fund Management
31
Verition Fund Management
Connecticut
$1.67M -$363K -32,612 -18%
MTCM
32
Mint Tower Capital Management
Netherlands
$1.61M – – –
TCM
33
Tenor Capital Management
New York
$1.59M -$356K -32,040 -18%
Geode Capital Management
34
Geode Capital Management
Massachusetts
$1.35M +$1.35M +121,373 New
BI
35
Bulldog Investors
New Jersey
$1.26M -$1.81M -162,555 -59%
DAM
36
Deltec Asset Management
New York
$1.11M -$167K -15,000 -13%
MCM
37
Massar Capital Management
Connecticut
$1.11M +$1.11M +100,000 New
WC
38
Wexford Capital
Florida
$1.11M +$1.11M +100,000 New
HLAM
39
Hidden Lake Asset Management
New York
$1.1M +$1.11M +99,370 New
PC
40
Periscope Capital
Ontario, Canada
$944K -$779K -70,000 -45%
WAM
41
Wolverine Asset Management
Illinois
$931K -$1.89M -170,160 -67%
BCM
42
Bluefin Capital Management
New York
$829K +$830K +74,665 New
Morgan Stanley
43
Morgan Stanley
New York
$788K +$567K +50,969 +255%
Citadel Advisors
44
Citadel Advisors
Florida
$774K +$775K +69,721 New
CCM
45
Context Capital Management
California
$608K -$2.73M -245,200 -82%
SCM
46
Shaolin Capital Management
Florida
$555K +$556K +50,000 New
JP Morgan Chase
47
JP Morgan Chase
New York
$552K +$553K +49,740 New
FLC
48
Fifth Lane Capital
Texas
$500K +$501K +45,000 New
FIA
49
FNY Investment Advisers
New York
$460K +$460K +41,400 +41,400%
YCM
50
Yaupon Capital Management
New York
$390K +$391K +35,139 New
1
2
3

IMSR Hedge Fund Activity: Q2 2025 in Review

65 of the 7,596 institutional investors tracked by Wall St. Rank reported a position in Terrestrial Energy (IMSR) for Q2 2025, worth a combined $210M — down 1.8% from $213M a quarter earlier.

Buyers outnumbered sellers: 29 funds opened new IMSR positions and 9 closed out — a net gain of 20 holders — while 7 added to existing stakes and 23 trimmed.

The largest buyer was Vennlight Capital Management, opening a new position worth an estimated $11.4M. The largest seller was AQR Arbitrage, exiting entirely with an estimated $13.6M sold.

  • 65 institutional investors held Terrestrial Energy (IMSR) as of Q2 2025, up from 45 in Q1 2025.
  • Funds reported $210M of Terrestrial Energy stock for Q2 2025, down 1.8% quarter-over-quarter.
  • 29 funds opened new Terrestrial Energy positions in Q2 2025 and 9 closed out, a net change of +20 holders.
  • The largest Terrestrial Energy buyer in Q2 2025 was Vennlight Capital Management, an estimated $11.4M added.
  • The largest Terrestrial Energy seller in Q2 2025 was AQR Arbitrage, an estimated $13.6M sold.

Based on aggregated 13F filings for Q2 2025.