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Amphastar Pharmaceuticals
AMPH

Overview Fund Activity

241 hedge funds and large institutions have $965M invested in Amphastar Pharmaceuticals in 2025 Q1 according to their latest regulatory filings, with 34 funds opening new positions, 80 increasing their positions, 95 reducing their positions, and 49 closing their positions.

Holders
241
Holders Change
-21
Holders Change %
-8.02%
% of All Funds
3.27%
Holding in Top 10
–
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-100%
% of All Funds
–
New
34
Increased
80
Reduced
95
Closed
49
Calls
$637K
Puts
$336K
Net Calls
+$301K
Net Calls Change
-$398K

Top Buyers

1
Millennium Management
1
Millennium Management
New York
$25.2M
2
Marshall Wace
2
Marshall Wace
United Kingdom
$29.9M
3
TD Asset Management
3
TD Asset Management
Ontario, Canada
$64.1M
4
ECM
4
ExodusPoint Capital Management
New York
$9.95M
5
RA
5
Royce & Associates
New York
$7.19M

Top Sellers

1
Neuberger Berman Group
1
Neuberger Berman Group
New York
$0
2
Pacer Advisors
2
Pacer Advisors
Pennsylvania
$13.9M
3
Bessemer Group
3
Bessemer Group
New Jersey
$17K
4
Vanguard Group
4
Vanguard Group
Pennsylvania
$70.2M
5
Federated Hermes
5
Federated Hermes
Pennsylvania
$17M
Name Market Value Shares Shares
Change 		Shares
Change %
CI
51
CX Institutional
Indiana
$2.38M 82,147 +82,147 New
New York State Common Retirement Fund
52
New York State Common Retirement Fund
New York
$2.37M 81,565 +11,075 +16%
Victory Capital Management
53
Victory Capital Management
Texas
$2.35M 81,087 +17,700 +28%
UBS AM
54
UBS AM
Illinois
$2.29M 79,089 -4,142 -5%
Citigroup
55
Citigroup
New York
$2.25M 77,737 +14,566 +23%
Two Sigma Investments
56
Two Sigma Investments
New York
$2.18M 75,328 -22,856 -23%
Swiss National Bank
57
Swiss National Bank
Switzerland
$2.16M 74,500 -1,900 -2%
Susquehanna International Group
58
Susquehanna International Group
Pennsylvania
$2.05M 70,709 +39,443 +126%
Squarepoint
59
Squarepoint
New York
$2.02M 69,770 +52,106 +295%
Barclays
60
Barclays
United Kingdom
$1.94M 66,952 -17,838 -21%
JPMorgan Chase & Co
61
JPMorgan Chase & Co
New York
$1.94M 66,880 -86,691 -56%
IIM
62
INTECH Investment Management
Florida
$1.75M 60,289 +18,133 +43%
Prudential Financial
63
Prudential Financial
New Jersey
$1.67M 37,614 -1,080 -3%
SW
64
SteelPeak Wealth
California
$1.62M 55,795 +55,795 New
AIC
65
Aurora Investment Counsel
Georgia
$1.57M 54,081 -624 -1%
AQR Capital Management
66
AQR Capital Management
Connecticut
$1.55M 53,638 +24,167 +82%
AllianceBernstein
67
AllianceBernstein
Tennessee
$1.47M 50,630 – –
Jane Street
68
Jane Street
New York
$1.35M 46,665 -52,822 -53%
CCIA
69
Campbell & Co Investment Adviser
Maryland
$1.33M 45,789 -1,777 -4%
GCP
70
GSA Capital Partners
United Kingdom
$1.31M 45,297 +27,863 +160%
TC
71
TwinBeech Capital
New York
$1.28M 43,986 -2,811 -6%
TPSF
72
Texas Permanent School Fund
Texas
$1.27M 51,906 +51,906 New
LSV Asset Management
73
LSV Asset Management
Illinois
$1.25M 43,200 +6,800 +19%
AssetMark Inc
74
AssetMark Inc
California
$1.18M 40,537 -1,384 -3%
EGM
75
Engineers Gate Manager
New York
$1.12M 38,545 +9,437 +32%
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