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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 %
EF
51
Empowered Funds
Pennsylvania
$1.95M +$1.95M +85,112 New
BCM
52
Bridgeway Capital Management
Texas
$1.95M +$1.95M +85,112 New
Barclays
53
Barclays
United Kingdom
$1.89M +$348K +15,135 +23%
Arrowstreet Capital
54
Arrowstreet Capital
Massachusetts
$1.87M +$1.87M +81,239 New
NL
55
Nuveen LLC
North Carolina
$1.86M -$333K -14,523 -15%
Two Sigma Investments
56
Two Sigma Investments
New York
$1.84M +$110K +4,802 +6%
Victory Capital Management
57
Victory Capital Management
Texas
$1.76M -$97K -4,225 -5%
Prudential Financial
58
Prudential Financial
New Jersey
$1.75M +$181K +4,337 +12%
AQR Capital Management
59
AQR Capital Management
Connecticut
$1.74M +$510K +22,207 +41%
Swiss National Bank
60
Swiss National Bank
Switzerland
$1.67M -$43.6K -1,900 -3%
BNP Paribas Financial Markets
61
BNP Paribas Financial Markets
France
$1.65M +$1.46M +63,744 +802%
UBS Group
62
UBS Group
Switzerland
$1.53M -$516K -22,490 -25%
JF
63
Jump Financial
Illinois
$1.45M +$1.45M +63,334 New
QT
64
Quantbot Technologies
New York
$1.4M +$915K +39,846 +189%
GCP
65
GSA Capital Partners
United Kingdom
$1.31M +$270K +11,760 +26%
SW
66
SteelPeak Wealth
California
$1.28M – – –
Susquehanna International Group
67
Susquehanna International Group
Pennsylvania
$1.25M -$370K -16,111 -23%
EGM
68
Engineers Gate Manager
New York
$1.22M +$340K +14,803 +38%
AIC
69
Aurora Investment Counsel
Georgia
$1.22M -$19K -828 -2%
IIM
70
INTECH Investment Management
Florida
$1.17M -$212K -9,218 -15%
AllianceBernstein
71
AllianceBernstein
Tennessee
$1.16M – – –
BHCM
72
Brevan Howard Capital Management
Jersey
$1.12M +$926K +40,335 +470%
New York State Common Retirement Fund
73
New York State Common Retirement Fund
New York
$1.11M -$762K -33,196 -41%
AssetMark Inc
74
AssetMark Inc
California
$1M +$74.1K +3,229 +8%
LSV Asset Management
75
LSV Asset Management
Illinois
$992K – – –
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