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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.

New
Increased
Maintained
Reduced
Closed

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% → 57.57% (+8.1%)

Holders
157
Holders Change
+27
Holders Change %
+20.77%
% of All Funds
2.06%
Holding in Top 10
4
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+33.33%
% of All Funds
0.05%
New
45
Increased
69
Reduced
32
Closed
17
Calls
$64.3M
Puts
$40.1M
Net Calls
+$24.2M
Net Calls Change
+$21.6M

Top Buyers

Rank Fund Capital Flow
1
BlackRock
BlackRock
New York
+$13.2M
2
Marshall Wace
Marshall Wace
United Kingdom
+$11.5M
3
Vanguard Group
Vanguard Group
Pennsylvania
+$11.4M
4
Susquehanna International Group
Susquehanna International Group
Pennsylvania
+$11.4M
5
Jane Street
Jane Street
New York
+$9.86M

Top Sellers

Rank Fund Capital Flow
1
Alyeska Investment Group
Alyeska Investment Group
Illinois
-$12.5M
2
BNP Paribas Asset Management
BNP Paribas Asset Management
France
-$12M
3
PFMOSF
Philadelphia Financial Management of San Francisco
California
-$9.3M
4
AIC
AWM Investment Company
New York
-$8.97M
5
Capital Research Global Investors
Capital Research Global Investors
California
-$7.6M
Name Holding Trade Value Shares
Change 		Change in
Stake
ECA
26
Encompass Capital Advisors
New York
$4.81M +$4.61M +500,000 New
Tudor Investment Corp
27
Tudor Investment Corp
Connecticut
$4.43M +$1.16M +125,687 +38%
Morgan Stanley
28
Morgan Stanley
New York
$4.23M -$107K -11,576 -3%
Voloridge Investment Management
29
Voloridge Investment Management
Florida
$4.02M +$1.78M +192,659 +86%
Goldman Sachs
30
Goldman Sachs
New York
$3.93M +$3.51M +380,303 +1,337%
JP Morgan Chase
31
JP Morgan Chase
New York
$3.6M +$1.43M +155,611 +71%
Verition Fund Management
32
Verition Fund Management
Connecticut
$3.5M +$2.71M +293,506 +418%
DC
33
Diametric Capital
Massachusetts
$3.42M +$794K +86,153 +32%
Two Sigma Investments
34
Two Sigma Investments
New York
$3.24M -$52.3K -5,667 -2%
AQR Capital Management
35
AQR Capital Management
Connecticut
$3.16M +$2.9M +313,987 +2,237%
GCP
36
GSA Capital Partners
United Kingdom
$3.08M -$591K -64,090 -17%
Creative Planning
37
Creative Planning
Kansas
$3.05M +$1.33M +143,995 +83%
CG
38
Caprock Group
Idaho
$2.75M +$2.73M +296,000 New
Millennium Management
39
Millennium Management
New York
$2.37M +$1.97M +213,704 +662%
RG
40
Rathbones Group
United Kingdom
$2.28M +$267K +28,915 +14%
Polen Capital Management
41
Polen Capital Management
Florida
$2.24M +$533K +57,775 +33%
Barclays
42
Barclays
United Kingdom
$2.24M +$520K +56,416 +32%
CCS
43
Concentric Capital Strategies
Connecticut
$2.1M +$2.01M +218,054 New
Bank of New York Mellon
44
Bank of New York Mellon
New York
$2.04M +$539K +58,450 +38%
PCM
45
Penn Capital Management
Pennsylvania
$1.94M +$1.69M +183,479 +983%
Renaissance Technologies
46
Renaissance Technologies
New York
$1.94M +$1.86M +201,200 New
MCM
47
Moore Capital Management
New York
$1.92M +$1.84M +200,000 New
SSA
48
Schonfeld Strategic Advisors
New York
$1.92M +$1.84M +199,847 New
Baird Financial Group
49
Baird Financial Group
Wisconsin
$1.85M +$1.77M +192,308 New
N
50
Nuveen
North Carolina
$1.61M +$326K +35,378 +27%
1
2
3 4 5

ASPI Hedge Fund Activity: Q3 2025 in Review

157 of the 7,619 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.