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IMSR

Terrestrial Energy
IMSR

45 hedge funds and large institutions have $213M invested in Terrestrial Energy in 2025 Q1 according to their latest regulatory filings, with 18 funds opening new positions, 3 increasing their positions, 15 reducing their positions, and 8 closing their positions.

New
Increased
Maintained
Reduced
Closed

125% more first-time investments, than exits

New positions opened: 18 | Existing positions closed: 8

32% more capital invested

Capital invested by funds: $162M → $213M (+$51.1M)

29% more funds holding

Funds holding: 35 → 45 (+10)

17.65% more ownership

Funds ownership: 70.36% → 88.01% (+18%)

80% less repeat investments, than reductions

Existing positions increased: 3 | Existing positions reduced: 15

Holders
45
Holders Change
+10
Holders Change %
+28.57%
% of All Funds
0.6%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
18
Increased
3
Reduced
15
Closed
8
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
LA
Linden Advisors
New York
+$20.3M
2
MF
Magnetar Financial
Illinois
+$19.9M
3
MI
MMCAP International
Cayman Islands
+$9.94M
4
ECA
Encompass Capital Advisors
New York
+$9.6M
5
Calamos Advisors
Calamos Advisors
Illinois
+$5.07M

Top Sellers

Rank Fund Capital Flow
1
KIM
Karpus Investment Management
New York
-$13M
2
WAM
Wolverine Asset Management
Illinois
-$5.19M
3
HCM
Highbridge Capital Management
New York
-$5.01M
4
FTCM
First Trust Capital Management
Illinois
-$3.46M
5
AA
AQR Arbitrage
Connecticut
-$2.79M
Name Holding Trade Value Shares
Change 		Change in
Stake
Verition Fund Management
26
Verition Fund Management
Connecticut
$1.93M -$211K -20,800 -10%
TCM
27
Tenor Capital Management
New York
$1.84M – – –
PC
28
Periscope Capital
Ontario, Canada
$1.63M -$457K -45,000 -23%
MTCM
29
Mint Tower Capital Management
Netherlands
$1.52M – – –
DAM
30
Deltec Asset Management
New York
$1.21M -$355K -35,000 -23%
HF
31
HRT Financial
New York
$1.05M +$1.01M +99,320 New
Toronto Dominion Bank
32
Toronto Dominion Bank
Ontario, Canada
$798K +$444K +43,758 +138%
Balyasny Asset Management
33
Balyasny Asset Management
Illinois
$687K +$659K +65,000 New
DAM
34
Decagon Asset Management
United Kingdom
$591K +$570K +56,178 New
SSA
35
Schonfeld Strategic Advisors
New York
$473K -$304K -29,991 -40%
Susquehanna International Group
36
Susquehanna International Group
Pennsylvania
$426K +$409K +40,291 New
GCL
37
Glazer Capital LLC
New York
$387K +$374K +36,831 New
TCM
38
Tuttle Capital Management
Connecticut
$368K – – –
UBS Group
39
UBS Group
Switzerland
$327K +$146K +14,430 +87%
PCM
40
PenderFund Capital Management
British Columbia, Canada
$296K – – –
MSU
41
Mizuho Securities USA
New York
$271K +$262K +25,837 New
Morgan Stanley
42
Morgan Stanley
New York
$210K +$203K +20,000 New
VF
43
Virtu Financial
New York
$143K -$1.34M -132,479 -91%
CS
44
Clear Street
New York
$1.74K -$73K -7,199 -98%
FIA
45
FNY Investment Advisers
New York
$1K +$1.01K +100 New
KIM
46
Karpus Investment Management
New York
– -$13M -1,293,947 Closed
HCM
47
Highbridge Capital Management
New York
– -$5.01M -500,000 Closed
CC
48
Centiva Capital
New York
– -$1.96M -195,221 Closed
DWM
49
Dakota Wealth Management
Florida
– -$1.04M -103,450 Closed
HCM
50
Heights Capital Management
California
– -$802K -80,000 Closed
1
2
3

IMSR Hedge Fund Activity: Q1 2025 in Review

45 of the 7,459 institutional investors tracked by Wall St. Rank reported a position in Terrestrial Energy (IMSR) for Q1 2025, worth a combined $213M — up 32% from $162M a quarter earlier.

Buyers outnumbered sellers: 18 funds opened new IMSR positions and 8 closed out — a net gain of 10 holders — while 3 added to existing stakes and 15 trimmed.

The largest buyer was Linden Advisors, opening a new position worth an estimated $20.3M. The largest seller was Karpus Investment Management, exiting entirely with an estimated $13M sold.

  • 45 institutional investors held Terrestrial Energy (IMSR) as of Q1 2025, up from 35 in Q4 2024.
  • Funds reported $213M of Terrestrial Energy stock for Q1 2025, up 32% quarter-over-quarter.
  • 18 funds opened new Terrestrial Energy positions in Q1 2025 and 8 closed out, a net change of +10 holders.
  • The largest Terrestrial Energy buyer in Q1 2025 was Linden Advisors, an estimated $20.3M added.
  • The largest Terrestrial Energy seller in Q1 2025 was Karpus Investment Management, an estimated $13M sold.

Based on aggregated 13F filings for Q1 2025.