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ASP Isotopes
ASPI

Overview Fund Activity

95 hedge funds and large institutions have $152M invested in ASP Isotopes in 2025 Q1 according to their latest regulatory filings, with 19 funds opening new positions, 36 increasing their positions, 25 reducing their positions, and 13 closing their positions.

Holders
95
Holders Change
+3
Holders Change %
+3.26%
% of All Funds
1.29%
Holding in Top 10
3
Holding in Top 10 Change
+2
Holding in Top 10 Change %
+200%
% of All Funds
0.04%
New
19
Increased
36
Reduced
25
Closed
13
Calls
$7.7M
Puts
$5.36M
Net Calls
+$2.34M
Net Calls Change
+$3.54M

Top Buyers

1
Capital Research Global Investors
1
Capital Research Global Investors
California
$13.5M
2
PFMOSF
2
Philadelphia Financial Management of San Francisco
California
$16.5M
3
AIC
3
AWM Investment Company
New York
$21.2M
4
Group One Trading
4
Group One Trading
Illinois
$1.26M
5
Tudor Investment Corp
5
Tudor Investment Corp
Connecticut
$704K

Top Sellers

1
CP
1
CenterBook Partners
Connecticut
$825K
2
UBS Group
2
UBS Group
Switzerland
$4.76M
3
BNP Paribas Asset Management
3
BNP Paribas Asset Management
France
$17.1M
4
Alyeska Investment Group
4
Alyeska Investment Group
Illinois
$0
5
GCP
5
GSA Capital Partners
United Kingdom
$2.67M
Name Market Value Shares Shares
Change 		Shares
Change %
AIC
1
AWM Investment Company
New York
$21.2M 4,511,186 +265,000 +6%
BlackRock
2
BlackRock
New York
$19M 4,051,080 +95,692 +2%
BNP Paribas Asset Management
3
BNP Paribas Asset Management
France
$17.1M 3,638,215 -690,287 -16%
PFMOSF
4
Philadelphia Financial Management of San Francisco
California
$16.5M 3,508,062 +354,517 +11%
Vanguard Group
5
Vanguard Group
Pennsylvania
$14.5M 3,088,052 -93,453 -3%
Capital Research Global Investors
6
Capital Research Global Investors
California
$13.5M 2,868,062 +2,868,062 New
TAM
7
Telemark Asset Management
Massachusetts
$6.92M 1,475,000 – –
Geode Capital Management
8
Geode Capital Management
Massachusetts
$5.88M 1,253,321 +77,871 +7%
State Street
9
State Street
Massachusetts
$4.91M 1,047,344 +17,612 +2%
UBS Group
10
UBS Group
Switzerland
$4.76M 1,015,464 -939,433 -48%
GCP
11
GSA Capital Partners
United Kingdom
$2.67M 569,578 -239,133 -30%
Northern Trust
12
Northern Trust
Illinois
$2.16M 460,729 +25,041 +6%
DC
13
Diametric Capital
Massachusetts
$1.84M 393,025 +89,170 +29%
RIM
14
Rovida Investment Management
Cayman Islands
$1.62M 350,000 +131,028 +60%
Susquehanna International Group
15
Susquehanna International Group
Pennsylvania
$1.3M 277,846 -106,626 -28%
Group One Trading
16
Group One Trading
Illinois
$1.26M 269,628 +202,507 +302%
Morgan Stanley
17
Morgan Stanley
New York
$1.23M 262,463 -53,077 -17%
JPMorgan Chase & Co
18
JPMorgan Chase & Co
New York
$1.07M 228,706 +16,813 +8%
RG
19
Rathbones Group
United Kingdom
$966K 205,929 +29,830 +17%
Two Sigma Investments
20
Two Sigma Investments
New York
$952K 203,067 -234,118 -54%
ACA
21
Apis Capital Advisors
New York
$896K 191,000 +18,472 +11%
Marshall Wace
22
Marshall Wace
United Kingdom
$835K 178,134 +30,137 +20%
CP
23
CenterBook Partners
Connecticut
$825K 175,959 -1,325,085 -88%
Charles Schwab
24
Charles Schwab
California
$776K 165,364 +7,138 +5%
PCM
25
Prelude Capital Management
New York
$721K 153,770 +51,050 +50%
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