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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 %
Citadel Advisors
26
Citadel Advisors
Florida
$6.71M +$3.13M +136,366 +87%
RA
27
Royce & Associates
New York
$6.5M +$811K +35,329 +14%
T. Rowe Price Associates
28
T. Rowe Price Associates
Maryland
$6.28M -$6.15M -267,933 -50%
Balyasny Asset Management
29
Balyasny Asset Management
Illinois
$6.11M +$2.39M +104,168 +64%
CI
30
CX Institutional
Indiana
$6.05M +$4.16M +181,136 +221%
American Century Companies
31
American Century Companies
Missouri
$5.35M -$1.72M -74,832 -24%
Principal Financial Group
32
Principal Financial Group
Iowa
$5.03M +$147K +6,395 +3%
Ameriprise
33
Ameriprise
Minnesota
$3.9M +$338K +14,703 +9%
Jane Street
34
Jane Street
New York
$3.68M +$2.6M +113,417 +243%
JPMorgan Chase & Co
35
JPMorgan Chase & Co
New York
$3.63M +$2.09M +91,234 +136%
TI
36
Trexquant Investment
Connecticut
$3.56M +$1.47M +63,938 +70%
Nordea Investment Management
37
Nordea Investment Management
Sweden
$3.49M +$24.9K +1,083 +0.7%
Bank of America
38
Bank of America
North Carolina
$3.33M +$882K +38,435 +36%
BCC
39
Bridge City Capital
Oregon
$3.18M +$523K +22,789 +20%
LG
40
LAM Group
Oregon
$3M – – –
Public Sector Pension Investment Board (PSP Investments)
41
Public Sector Pension Investment Board (PSP Investments)
Quebec, Canada
$2.88M +$149K +6,478 +5%
AG
42
Algert Global
California
$2.85M +$2.46M +106,990 +618%
Raymond James Financial
43
Raymond James Financial
Florida
$2.69M +$2.01M +87,447 +295%
SFI
44
Susquehanna Fundamental Investments
Pennsylvania
$2.33M -$311K -13,533 -12%
Legal & General Group
45
Legal & General Group
United Kingdom
$2.32M -$9.69K -422 -0.4%
RhumbLine Advisers
46
RhumbLine Advisers
Massachusetts
$2.19M +$145K +6,329 +7%
Two Sigma Advisers
47
Two Sigma Advisers
New York
$2.19M +$241K +10,500 +12%
First Trust Advisors
48
First Trust Advisors
Illinois
$2.17M +$1.76M +76,453 +428%
UBS AM
49
UBS AM
Illinois
$2.15M +$334K +14,563 +18%
TC
50
TwinBeech Capital
New York
$2.03M +$1.02M +44,544 +101%
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