ASP Isotopes
ASPI
157 hedge funds and large institutions have $509M invested in ASP Isotopes in 2025 Q3 according to their latest regulatory filings, with 45 funds opening new positions, 69 increasing their positions, 32 reducing their positions, and 17 closing their positions.
165% more first-time investments, than exits
New positions opened: 45 | Existing positions closed: 17
116% more repeat investments, than reductions
Existing positions increased: 69 | Existing positions reduced: 32
67% more capital invested
Capital invested by funds: $306M → $509M (+$203M)
60% more call options, than puts
Call options by funds: $64.3M | Put options by funds: $40.1M
33% more funds holding in top 10
Funds holding in top 10: 3 → 4 (+1)
21% more funds holding
Funds holding: 130 → 157 (+27)
8.08% more ownership
Funds ownership: 49.49% → 57.58% (+8.1%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$13.2M |
| 2 |
Marshall Wace
London,
United Kingdom
|
+$11.5M |
| 3 |
Vanguard Group
Malvern,
Pennsylvania
|
+$11.4M |
| 4 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
+$11.4M |
| 5 |
Jane Street
New York
|
+$9.86M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Alyeska Investment Group
Chicago,
Illinois
|
-$12.5M |
| 2 |
BNP Paribas Asset Management
Paris,
France
|
-$12M |
| 3 |
PFMOSF
Philadelphia Financial Management of San Francisco
San Francisco,
California
|
-$9.3M |
| 4 |
AIC
AWM Investment Company
New York
|
-$8.97M |
| 5 |
Capital Research Global Investors
Los Angeles,
California
|
-$7.6M |
ASPI Hedge Fund Activity: Q3 2025 in Review
157 of the 7,640 institutional investors tracked by Wall St. Rank reported a position in ASP Isotopes (ASPI) for Q3 2025, worth a combined $509M — up 67% from $306M a quarter earlier.
Buyers outnumbered sellers: 45 funds opened new ASPI positions and 17 closed out — a net gain of 28 holders — while 69 added to existing stakes and 32 trimmed.
The largest buyer was BlackRock, adding an estimated $13.2M. The largest seller was Alyeska Investment Group, cutting an estimated $12.5M.
- 157 institutional investors held ASP Isotopes (ASPI) as of Q3 2025, up from 130 in Q2 2025.
- Funds reported $509M of ASP Isotopes stock for Q3 2025, up 67% quarter-over-quarter.
- 45 funds opened new ASP Isotopes positions in Q3 2025 and 17 closed out, a net change of +28 holders.
- The largest ASP Isotopes buyer in Q3 2025 was BlackRock, an estimated $13.2M added.
- The largest ASP Isotopes seller in Q3 2025 was Alyeska Investment Group, an estimated $12.5M sold.
Based on aggregated 13F filings for Q3 2025.