ASP Isotopes
ASPI
173 hedge funds and large institutions have $313M invested in ASP Isotopes in 2025 Q4 according to their latest regulatory filings, with 49 funds opening new positions, 77 increasing their positions, 35 reducing their positions, and 31 closing their positions.
120% more repeat investments, than reductions
Existing positions increased: 77 | Existing positions reduced: 35
103% more call options, than puts
Call options by funds: $44M | Put options by funds: $21.6M
58% more first-time investments, than exits
New positions opened: 49 | Existing positions closed: 31
10% more funds holding
Funds holding: 157 → 173 (+16)
4.74% less ownership
Funds ownership: 57.58% → 52.83% (-4.7%)
38% less capital invested
Capital invested by funds: $509M → $313M (-$196M)
75% less funds holding in top 10
Funds holding in top 10: 4 → 1 (-3)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Alyeska Investment Group
Chicago,
Illinois
|
+$16.5M |
| 2 |
Vanguard Group
Malvern,
Pennsylvania
|
+$15M |
| 3 |
UBS Group
Zurich,
Switzerland
|
+$11.5M |
| 4 |
BlackRock
New York
|
+$10.6M |
| 5 |
Goldman Sachs
New York
|
+$10.4M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Capital Research Global Investors
Los Angeles,
California
|
-$19.7M |
| 2 |
PFMOSF
Philadelphia Financial Management of San Francisco
San Francisco,
California
|
-$16M |
| 3 |
DCM
Driehaus Capital Management
Chicago,
Illinois
|
-$13.7M |
| 4 |
JF
Jump Financial
Chicago,
Illinois
|
-$9.05M |
| 5 |
SBF
Sara-Bay Financial
Sarasota,
Florida
|
-$8.69M |
ASPI Hedge Fund Activity: Q4 2025 in Review
173 of the 8,270 institutional investors tracked by Wall St. Rank reported a position in ASP Isotopes (ASPI) for Q4 2025, worth a combined $313M — down 38% from $509M a quarter earlier.
Buyers outnumbered sellers: 49 funds opened new ASPI positions and 31 closed out — a net gain of 18 holders — while 77 added to existing stakes and 35 trimmed.
The largest buyer was Alyeska Investment Group, adding an estimated $16.5M. The largest seller was Capital Research Global Investors, exiting entirely with an estimated $19.7M sold.
- 173 institutional investors held ASP Isotopes (ASPI) as of Q4 2025, up from 157 in Q3 2025.
- Funds reported $313M of ASP Isotopes stock for Q4 2025, down 38% quarter-over-quarter.
- 49 funds opened new ASP Isotopes positions in Q4 2025 and 31 closed out, a net change of +18 holders.
- The largest ASP Isotopes buyer in Q4 2025 was Alyeska Investment Group, an estimated $16.5M added.
- The largest ASP Isotopes seller in Q4 2025 was Capital Research Global Investors, an estimated $19.7M sold.
Based on aggregated 13F filings for Q4 2025.