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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 %
Hotchkis & Wiley Capital Management
26
Hotchkis & Wiley Capital Management
California
$7.83M 270,150 +32,630 +14%
Bank of New York Mellon
27
Bank of New York Mellon
New York
$7.71M 266,075 -19,788 -7%
Qube Research & Technologies (QRT)
28
Qube Research & Technologies (QRT)
United Kingdom
$7.51M 258,981 +143,689 +125%
RA
29
Royce & Associates
New York
$7.19M 247,858 +238,956 +2,684%
Voloridge Investment Management
30
Voloridge Investment Management
Florida
$6.26M 216,002 +72,566 +51%
Principal Financial Group
31
Principal Financial Group
Iowa
$6.16M 212,647 +4,669 +2%
SAM
32
Silvercrest Asset Management
New York
$4.81M 165,856 -958 -0.6%
Balyasny Asset Management
33
Balyasny Asset Management
Illinois
$4.7M 162,138 +162,138 New
Citadel Advisors
34
Citadel Advisors
Florida
$4.52M 155,979 +15,566 +11%
Ameriprise
35
Ameriprise
Minnesota
$4.5M 155,146 +9,131 +6%
Nordea Investment Management
36
Nordea Investment Management
Sweden
$4.32M 150,932 -128,782 -46%
LG
37
LAM Group
Oregon
$3.79M 130,800 – –
Janus Henderson Group
38
Janus Henderson Group
United Kingdom
$3.54M 124,402 -64,945 -34%
FCM
39
Frontier Capital Management
Massachusetts
$3.47M 119,628 -3,732 -3%
Public Sector Pension Investment Board (PSP Investments)
40
Public Sector Pension Investment Board (PSP Investments)
Quebec, Canada
$3.45M 118,885 +25,455 +27%
BCC
41
Bridge City Capital
Oregon
$3.36M 115,855 +45,760 +65%
SFI
42
Susquehanna Fundamental Investments
Pennsylvania
$3.34M 115,086 +115,086 New
Bank of America
43
Bank of America
North Carolina
$3.09M 106,690 -5,404 -5%
Legal & General Group
44
Legal & General Group
United Kingdom
$2.94M 101,576 -2,165 -2%
NL
45
Nuveen LLC
North Carolina
$2.77M 95,665 +95,665 New
TI
46
Trexquant Investment
Connecticut
$2.65M 91,291 -14,237 -13%
UBS Group
47
UBS Group
Switzerland
$2.59M 89,324 -64,418 -42%
RhumbLine Advisers
48
RhumbLine Advisers
Massachusetts
$2.58M 88,958 +1,631 +2%
HF
49
HRT Financial
New York
$2.5M 86,364 +86,364 New
Two Sigma Advisers
50
Two Sigma Advisers
New York
$2.46M 84,700 -1,200 -1%
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