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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 %
CTWM
226
Cherry Tree Wealth Management
Minnesota
$1.68K 58 +58 New
PA
227
Parallel Advisors
California
$1.68K 58 +47 +427%
SS
228
SBI Securities
Japan
$1.16K 40 – –
HFS
229
Hantz Financial Services
Michigan
$1K 39 +39 New
SW
230
SVB Wealth
Massachusetts
$986 34 +34 New
FMII
231
Farmers & Merchants Investments Inc
Nebraska
$812 28 – –
PWMG
232
Private Wealth Management Group
New Jersey
$580 20 +20 New
Barrow, Hanley, Mewhinney & Strauss
233
Barrow, Hanley, Mewhinney & Strauss
Texas
$580 20 +20 New
BIA
234
Bell Investment Advisors
California
$435 15 -12 -44%
Kayne Anderson Rudnick Investment Management
235
Kayne Anderson Rudnick Investment Management
California
$435 15 – –
SC
236
Stephens Consulting
Michigan
$435 15 +15 New
LWMI
237
Legacy Wealth Management (Idaho)
Idaho
$290 10 – –
BGAI
238
Bruce G. Allen Investments
Colorado
$261 9 – –
TWD
239
True Wealth Design
Ohio
$261 9 +9 New
AWM
240
Abound Wealth Management
Tennessee
$116 4 – –
EWA
241
EverSource Wealth Advisors
Alabama
$116 4 +3 +300%
Neuberger Berman Group
242
Neuberger Berman Group
New York
– – -1,374,125 Closed
OAM
243
Oberweis Asset Management
Illinois
– – -184,595 Closed
CCMG
244
Clark Capital Management Group
Pennsylvania
– – -148,075 Closed
PCM
245
Portolan Capital Management
Massachusetts
– – -131,123 Closed
RG
246
Renaissance Group
Kentucky
– – -99,572 Closed
MOACM
247
Mutual of America Capital Management
New York
– – -92,251 Closed
PP
248
PDT Partners
New York
– – -90,484 Closed
SSA
249
Schonfeld Strategic Advisors
New York
– – -42,614 Closed
CCG
250
Chatham Capital Group
Georgia
– – -27,295 Closed
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