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Amphastar Pharmaceuticals
AMPH

Overview Fund Activity

239 hedge funds and large institutions have $750M invested in Amphastar Pharmaceuticals in 2025 Q2 according to their latest regulatory filings, with 43 funds opening new positions, 91 increasing their positions, 71 reducing their positions, and 40 closing their positions.

Holders
239
Holders Change
-2
Holders Change %
-0.83%
% of All Funds
3.21%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
43
Increased
91
Reduced
71
Closed
40
Calls
$447K
Puts
$381K
Net Calls
+$66K
Net Calls Change
-$235K

Top Buyers

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

Top Sellers

1
Federated Hermes
1
Federated Hermes
Pennsylvania
$258K
2
Boston Partners
2
Boston Partners
Massachusetts
$0
3
BlackRock
3
BlackRock
New York
$130M
4
GIP
4
Granite Investment Partners
California
$0
5
ECM
5
ExodusPoint Capital Management
New York
$745K
Name Market Value Shares Shares
Change 		Shares
Change %
Citigroup
76
Citigroup
New York
$969K 42,220 -35,517 -46%
HF
77
HRT Financial
New York
$966K 42,080 -44,284 -51%
Capital Fund Management (CFM)
78
Capital Fund Management (CFM)
France
$931K 40,570 +40,570 New
OSAM
79
O'Shaughnessy Asset Management
Connecticut
$925K 40,309 +40,309 New
SPS
80
Susquehanna Portfolio Strategies
Pennsylvania
$908K 39,564 +39,564 New
EP
81
Edgestream Partners
New Jersey
$852K 37,112 +37,112 New
LCM
82
Legato Capital Management
California
$828K 36,060 +6,361 +21%
California State Teachers Retirement System (CalSTRS)
83
California State Teachers Retirement System (CalSTRS)
California
$824K 35,877 -492 -1%
AWA
84
Arkadios Wealth Advisors
Georgia
$807K 35,163 +1,197 +4%
PCM
85
Polaris Capital Management
Massachusetts
$806K 35,100 +4,300 +14%
AC
86
Aristeia Capital
Connecticut
$777K 33,835 – –
DTL
87
Dynamic Technology Lab
Singapore
$765K 33,300 +33,300 New
ECM
88
ExodusPoint Capital Management
New York
$745K 32,444 -310,848 -91%
Canada Life
89
Canada Life
Manitoba, Canada
$694K 30,216 -1,046 -3%
A
90
AlphaQuest
New York
$663K 28,882 +17,289 +149%
IIM
91
Illumine Investment Management
Washington
$623K 27,126 +596 +2%
Thrivent Financial for Lutherans
92
Thrivent Financial for Lutherans
Minnesota
$621K 27,036 -511 -2%
AO
93
Advisor OS
Illinois
$583K 25,405 – –
State of Wisconsin Investment Board
94
State of Wisconsin Investment Board
Wisconsin
$582K 25,332 -260 -1%
Deutsche Bank
95
Deutsche Bank
Germany
$578K 25,178 -5,732 -19%
MAM
96
Martingale Asset Management
Massachusetts
$563K 24,542 – –
SG Americas Securities
97
SG Americas Securities
New York
$561K 24,448 +24,448 New
Wells Fargo
98
Wells Fargo
California
$560K 24,396 -4,965 -17%
Osaic Holdings
99
Osaic Holdings
Arizona
$557K 15,446 -696 -4%
CC
100
Centiva Capital
New York
$555K 24,161 +24,161 New
2 3
4
5 6