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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 %
Citadel Advisors
26
Citadel Advisors
Florida
$6.71M 292,345 +136,366 +87%
RA
27
Royce & Associates
New York
$6.5M 283,187 +35,329 +14%
T. Rowe Price Associates
28
T. Rowe Price Associates
Maryland
$6.28M 273,288 -267,933 -50%
Balyasny Asset Management
29
Balyasny Asset Management
Illinois
$6.11M 266,306 +104,168 +64%
CI
30
CX Institutional
Indiana
$6.05M 263,283 +181,136 +221%
American Century Companies
31
American Century Companies
Missouri
$5.35M 233,161 -74,832 -24%
Principal Financial Group
32
Principal Financial Group
Iowa
$5.03M 219,042 +6,395 +3%
Ameriprise
33
Ameriprise
Minnesota
$3.9M 169,849 +14,703 +9%
Jane Street
34
Jane Street
New York
$3.68M 160,082 +113,417 +243%
JPMorgan Chase & Co
35
JPMorgan Chase & Co
New York
$3.63M 158,114 +91,234 +136%
TI
36
Trexquant Investment
Connecticut
$3.56M 155,229 +63,938 +70%
Nordea Investment Management
37
Nordea Investment Management
Sweden
$3.49M 152,015 +1,083 +0.7%
Bank of America
38
Bank of America
North Carolina
$3.33M 145,125 +38,435 +36%
BCC
39
Bridge City Capital
Oregon
$3.18M 138,644 +22,789 +20%
LG
40
LAM Group
Oregon
$3M 130,800 – –
Public Sector Pension Investment Board (PSP Investments)
41
Public Sector Pension Investment Board (PSP Investments)
Quebec, Canada
$2.88M 125,363 +6,478 +5%
AG
42
Algert Global
California
$2.85M 124,290 +106,990 +618%
Raymond James Financial
43
Raymond James Financial
Florida
$2.69M 117,119 +87,447 +295%
SFI
44
Susquehanna Fundamental Investments
Pennsylvania
$2.33M 101,553 -13,533 -12%
Legal & General Group
45
Legal & General Group
United Kingdom
$2.32M 101,154 -422 -0.4%
RhumbLine Advisers
46
RhumbLine Advisers
Massachusetts
$2.19M 95,287 +6,329 +7%
Two Sigma Advisers
47
Two Sigma Advisers
New York
$2.19M 95,200 +10,500 +12%
First Trust Advisors
48
First Trust Advisors
Illinois
$2.17M 94,305 +76,453 +428%
UBS AM
49
UBS AM
Illinois
$2.15M 93,652 +14,563 +18%
TC
50
TwinBeech Capital
New York
$2.03M 88,530 +44,544 +101%
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