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.
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
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
VCM
Vennlight Capital Management
Weston,
Connecticut
|
+$11.4M |
| 2 |
ACM
Arosa Capital Management
Miami Beach,
Florida
|
+$6.23M |
| 3 |
SC
Shay Capital
New York
|
+$6.1M |
| 4 |
Balyasny Asset Management
Chicago,
Illinois
|
+$5.34M |
| 5 |
CF
Cantor Fitzgerald
New York
|
+$5.19M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AA
AQR Arbitrage
Greenwich,
Connecticut
|
-$13.6M |
| 2 |
ECA
Encompass Capital Advisors
New York
|
-$10M |
| 3 |
PMAM
Picton Mahoney Asset Management
Toronto,
Ontario, Canada
|
-$9.32M |
| 4 |
FTCM
First Trust Capital Management
Chicago,
Illinois
|
-$7.54M |
| 5 |
MF
Magnetar Financial
Evanston,
Illinois
|
-$6.25M |
IMSR Hedge Fund Activity: Q2 2025 in Review
65 of the 7,614 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.