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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 Holding Trade Value Shares
Change 		Shares
Change %
GT
251
Glenmede Trust
Pennsylvania
– -$919K -24,743 Closed
RI
252
Redwood Investments
Massachusetts
– -$797K -21,459 Closed
DTL
253
Dynamic Technology Lab
Singapore
– -$711K -19,150 Closed
FRM
254
Fox Run Management
Connecticut
– -$688K -18,526 Closed
I
255
INVST
Indiana
– -$421K -11,346 Closed
DADC
256
D.A. Davidson & Co
Montana
– -$417K -11,244 Closed
CC
257
Centiva Capital
New York
– -$364K -9,803 Closed
Point72 Asset Management
258
Point72 Asset Management
Connecticut
– -$342K -9,200 Closed
HSBC Holdings
259
HSBC Holdings
United Kingdom
– -$330K -8,991 Closed
Walleye Capital
260
Walleye Capital
New York
– -$322K -8,666 Closed
TF
261
Trek Financial
Arizona
– -$284K -7,638 Closed
AA
262
ALPS Advisors
Colorado
– -$275K -7,395 Closed
ACM
263
Aquatic Capital Management
Illinois
– -$261K -7,036 Closed
Allianz Asset Management
264
Allianz Asset Management
Germany
– -$249K -6,700 Closed
AC
265
AXQ Capital
New Jersey
– -$246K -6,621 Closed
YMRC
266
Yorktown Management & Research Company
Virginia
– -$245K -6,600 Closed
Verition Fund Management
267
Verition Fund Management
Connecticut
– -$235K -6,338 Closed
VIA
268
Virtus Investment Advisers
Connecticut
– -$227K -6,109 Closed
Truist Financial
269
Truist Financial
North Carolina
– -$210K -5,661 Closed
DWM
270
Dakota Wealth Management
Florida
– -$204K -5,486 Closed
CIC
271
Cornercap Investment Counsel
Georgia
– -$201K -5,421 Closed
ABLA
272
Alan B. Lancz & Associates
Ohio
– -$201K -5,400 Closed
MFG
273
Mendota Financial Group
Wisconsin
– -$127K -3,426 Closed
ACM
274
Aster Capital Management
United Arab Emirates
– -$107K -2,869 Closed
Lazard Asset Management
275
Lazard Asset Management
New York
– -$60K -1,630 Closed
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