AMPH icon

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 %
OPERF
151
Oregon Public Employees Retirement Fund
Oregon
$248K 8,542 -300 -3%
EC
152
EntryPoint Capital
New York
$246K 8,498 -5,160 -38%
SI
153
Shaker Investments
Ohio
$246K 8,475 -10,045 -54%
CWM
154
CIBC World Markets
New York
$243K 8,399 +8,399 New
PFSRSONJ
155
Police & Firemen's Retirement System of New Jersey
New Jersey
$240K 8,288 – –
QCG
156
Quadrant Capital Group
Ohio
$240K 8,277 +7,537 +1,019%
Bank of Montreal
157
Bank of Montreal
Ontario, Canada
$238K 8,206 -9 -0.1%
Rafferty Asset Management
158
Rafferty Asset Management
New York
$236K 8,126 +8,126 New
CIP
159
Cornerstone Investment Partners
Georgia
$233K 8,028 -702 -8%
HWM
160
Hohimer Wealth Management
Washington
$232K 8,005 +520 +7%
BNP Paribas Financial Markets
161
BNP Paribas Financial Markets
France
$230K 7,945 -29,019 -79%
VPIM
162
Vanguard Personalized Indexing Management
California
$225K 7,769 +7,769 New
HWAM
163
Hennion & Walsh Asset Management
New Jersey
$225K 7,764 -175 -2%
Zurich Cantonal Bank
164
Zurich Cantonal Bank
Switzerland
$218K 7,504 – –
CI
165
Corient IA
Florida
$217K 7,500 +7,500 New
KK
166
KLP Kapitalforvaltning
Norway
$215K 7,400 – –
Corient Private Wealth
167
Corient Private Wealth
Florida
$210K 7,230 -8,151 -53%
TIA
168
Tiemann Investment Advisors
California
$202K 6,962 – –
FC
169
FORA Capital
Florida
$200K 6,903 +6,903 New
OC
170
Oakworth Capital
Alabama
$174K 6,000 +977 +19%
Public Employees Retirement Association of Colorado
171
Public Employees Retirement Association of Colorado
Colorado
$153K 5,265 – –
SOW
172
State of Wyoming
Wyoming
$141K 4,860 +4,860 New
Fidelity Investments
173
Fidelity Investments
Massachusetts
$139K 4,806 -16,539 -77%
PNC Financial Services Group
174
PNC Financial Services Group
Pennsylvania
$139K 4,783 +580 +14%
SAM
175
Shell Asset Management
Netherlands
$134K 4,633 -201 -4%
5 6
7
8 9