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Amphastar Pharmaceuticals
AMPH

Overview Fund Activity

241 hedge funds and large institutions have $751M invested in Amphastar Pharmaceuticals in 2025 Q2 according to their latest regulatory filings, with 43 funds opening new positions, 91 increasing their positions, 73 reducing their positions, and 40 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
241
Holders Change
–
Holders Change %
0%
% of All Funds
3.23%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
43
Increased
91
Reduced
73
Closed
40
Calls
$447K
Puts
$381K
Net Calls
+$66K
Net Calls Change
-$235K

Top Buyers

1
Royal Bank of Canada
Royal Bank of Canada
Ontario, Canada
$7.32M
2
Dimensional Fund Advisors
Dimensional Fund Advisors
Texas
$37.4M
3
D.E. Shaw & Co
D.E. Shaw & Co
New York
$6.75M
4
Vanguard Group
Vanguard Group
Pennsylvania
$61.7M
5
Qube Research & Technologies (QRT)
Qube Research & Technologies (QRT)
United Kingdom
$10.8M

Top Sellers

1
Federated Hermes
Federated Hermes
Pennsylvania
$258K
2
Boston Partners
Boston Partners
Massachusetts
$0
3
BlackRock
BlackRock
New York
$130M
4
GIP
Granite Investment Partners
California
$0
5
ECM
ExodusPoint Capital Management
New York
$745K
Name Holding Trade Value Shares
Change 		Shares
Change %
CC
101
Centiva Capital
New York
$555K +$555K +24,161 New
New York State Teachers Retirement System (NYSTRS)
102
New York State Teachers Retirement System (NYSTRS)
New York
$545K -$3.08K -134 -0.6%
MIM
103
MetLife Investment Management
New Jersey
$530K – – –
Squarepoint
104
Squarepoint
New York
$529K -$1.07M -46,744 -67%
CCIA
105
Campbell & Co Investment Adviser
Maryland
$515K -$536K -23,356 -51%
SOADOR
106
State of Alaska Department of Revenue
Alaska
$502K +$25.5K +1,111 +5%
FRM
107
Fox Run Management
Connecticut
$487K +$487K +21,199 New
ACM
108
Aquatic Capital Management
Illinois
$487K +$487K +21,195 New
DekaBank Deutsche Girozentrale
109
DekaBank Deutsche Girozentrale
Germany
$475K – – –
Mirae Asset Global ETFs Holdings
110
Mirae Asset Global ETFs Holdings
Hong Kong
$467K -$49.4K -2,151 -10%
Man Group
111
Man Group
United Kingdom
$466K -$412K -17,937 -47%
GCM
112
Graham Capital Management
Connecticut
$466K -$141K -6,136 -23%
IMRF
113
Illinois Municipal Retirement Fund
Illinois
$458K -$9.6K -418 -2%
Manulife (Manufacturers Life Insurance)
114
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$429K -$26.1K -1,138 -6%
VOYA Investment Management
115
VOYA Investment Management
Georgia
$416K -$987 -43 -0.2%
CG
116
Cynosure Group
Utah
$409K +$124K +5,419 +44%
YIH
117
Y-Intercept (HK)
Hong Kong
$407K +$407K +17,727 New
VA
118
Vident Advisory
Georgia
$397K +$397K +17,279 New
LSERS
119
Louisiana State Employees Retirement System
Louisiana
$395K -$11.5K -500 -3%
Janus Henderson Group
120
Janus Henderson Group
United Kingdom
$387K -$2.47M -107,534 -86%
Assenagon Asset Management
121
Assenagon Asset Management
Luxembourg
$381K +$32K +1,394 +9%
SWP
122
Significant Wealth Partners
Illinois
$371K +$137K +5,963 +58%
OQS
123
Occudo Quantitative Strategies
Florida
$362K +$362K +15,774 New
Wellington Management Group
124
Wellington Management Group
Massachusetts
$359K -$29.7K -1,295 -8%
AR
125
Advisory Research
Illinois
$342K +$23.2K +1,009 +7%
3 4
5
6 7