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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 %
A
126
AlphaQuest
New York
$336K 11,593 +6,731 +138%
Comerica Bank
127
Comerica Bank
Texas
$335K 11,563 -242 -2%
PA
128
Profund Advisors
Maryland
$326K 11,256 +3,336 +42%
SBH
129
Segall Bryant & Hamill
Illinois
$324K 11,185 -7,696 -41%
YCM
130
Yousif Capital Management
Michigan
$322K 11,115 -231 -2%
ProShare Advisors
131
ProShare Advisors
Maryland
$321K 11,077 -2,775 -20%
ASRS
132
Arizona State Retirement System
Arizona
$319K 11,012 -292 -3%
MSRPS
133
Maryland State Retirement & Pension System
Maryland
$317K 10,936 -1,694 -13%
State Board of Administration of Florida Retirement System
134
State Board of Administration of Florida Retirement System
Florida
$316K 10,913 – –
GAM
135
Gotham Asset Management
New York
$315K 10,870 -17,578 -62%
AB
136
Amalgamated Bank
New York
$312K 10,761 -237 -2%
Teacher Retirement System of Texas
137
Teacher Retirement System of Texas
Texas
$300K 10,358 -1,190 -10%
Pathstone Holdings
138
Pathstone Holdings
New Jersey
$300K 10,328 +634 +7%
SWP
139
Significant Wealth Partners
Illinois
$296K 10,215 +3,080 +43%
Envestnet Asset Management
140
Envestnet Asset Management
Illinois
$288K 9,938 -22,265 -69%
CL
141
CIM LLC
New York
$287K 9,888 -190 -2%
CUAMC
142
China Universal Asset Management Company
China
$280K 9,644 -551 -5%
SEI Investments
143
SEI Investments
Pennsylvania
$278K 9,591 -18,534 -66%
VRS
144
Virginia Retirement Systems
Virginia
$277K 9,562 +9,562 New
VI
145
Vestcor Inc
New Brunswick, Canada
$272K 9,383 – –
SCM
146
Sterling Capital Management
North Carolina
$270K 9,319 – –
State of Tennessee, Department of Treasury
147
State of Tennessee, Department of Treasury
Tennessee
$270K 9,300 -7,492 -45%
COPPSERS
148
Commonwealth of Pennsylvania Public School Employees Retirement System
Pennsylvania
$260K 8,975 +969 +12%
ETC
149
Exchange Traded Concepts
Oklahoma
$257K 8,866 +8,866 New
BHCM
150
Brevan Howard Capital Management
Jersey
$249K 8,585 +1,680 +24%
4 5
6
7 8