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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 %
Man Group
76
Man Group
United Kingdom
$1.11M 38,237 +16,412 +75%
California State Teachers Retirement System (CalSTRS)
77
California State Teachers Retirement System (CalSTRS)
California
$1.05M 36,369 – –
N
78
Numerai
California
$986K 34,006 +34,006 New
AWA
79
Arkadios Wealth Advisors
Georgia
$985K 33,966 +6,002 +21%
AC
80
Aristeia Capital
Connecticut
$981K 33,835 -9,400 -22%
Connor, Clark & Lunn Investment Management (CC&L)
81
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
$935K 32,241 -35,126 -52%
HSA
82
Hussman Strategic Advisors
Maryland
$913K 31,500 +31,500 New
Canada Life
83
Canada Life
Manitoba, Canada
$907K 31,262 -3,783 -11%
Deutsche Bank
84
Deutsche Bank
Germany
$896K 30,910 -3,172 -9%
PCM
85
Polaris Capital Management
Massachusetts
$893K 30,800 +6,300 +26%
LCM
86
Legato Capital Management
California
$861K 29,699 +11,238 +61%
Raymond James Financial
87
Raymond James Financial
Florida
$860K 29,672 -63,232 -68%
Wells Fargo
88
Wells Fargo
California
$851K 29,361 +5,809 +25%
D.E. Shaw & Co
89
D.E. Shaw & Co
New York
$846K 29,188 -89,663 -75%
Thrivent Financial for Lutherans
90
Thrivent Financial for Lutherans
Minnesota
$799K 27,547 -1,441 -5%
IIM
91
Illumine Investment Management
Washington
$769K 26,530 +9,481 +56%
GCM
92
Graham Capital Management
Connecticut
$766K 26,424 +26,424 New
Royal Bank of Canada
93
Royal Bank of Canada
Ontario, Canada
$756K 26,079 -2,553 -9%
State of Wisconsin Investment Board
94
State of Wisconsin Investment Board
Wisconsin
$742K 25,592 -57 -0.2%
AO
95
Advisor OS
Illinois
$736K 25,405 – –
MAM
96
Martingale Asset Management
Massachusetts
$711K 24,542 -15,663 -39%
New York State Teachers Retirement System (NYSTRS)
97
New York State Teachers Retirement System (NYSTRS)
New York
$692K 23,866 – –
MIM
98
MetLife Investment Management
New Jersey
$669K 23,093 -359 -2%
Mirae Asset Global ETFs Holdings
99
Mirae Asset Global ETFs Holdings
Hong Kong
$652K 22,489 +613 +3%
Tudor Investment Corp
100
Tudor Investment Corp
Connecticut
$632K 21,793 +21,793 New
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4
5 6