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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 %
BlackRock
1
BlackRock
New York
$178M 6,147,658 +29,836 +0.5%
Vanguard Group
2
Vanguard Group
Pennsylvania
$70.2M 2,422,904 -291,724 -11%
TD Asset Management
3
TD Asset Management
Ontario, Canada
$64.1M 2,212,142 +371,856 +20%
State Street
4
State Street
Massachusetts
$46.5M 1,604,614 +8,504 +0.5%
Dimensional Fund Advisors
5
Dimensional Fund Advisors
Texas
$39.3M 1,356,360 +157,770 +13%
Fuller & Thaler Asset Management
6
Fuller & Thaler Asset Management
California
$36.6M 1,263,598 +130,672 +12%
EIP
7
Epoch Investment Partners
New York
$36.6M 1,261,307 +160,034 +15%
BTW
8
Boston Trust Walden
Massachusetts
$35.2M 1,215,624 +236,704 +24%
Marshall Wace
9
Marshall Wace
United Kingdom
$29.9M 1,031,722 +423,016 +69%
Geode Capital Management
10
Geode Capital Management
Massachusetts
$27.7M 955,076 +38,995 +4%
Millennium Management
11
Millennium Management
New York
$25.2M 868,551 +611,995 +239%
Northern Trust
12
Northern Trust
Illinois
$17.2M 594,437 -18,733 -3%
Federated Hermes
13
Federated Hermes
Pennsylvania
$17M 585,115 -238,372 -29%
T. Rowe Price Associates
14
T. Rowe Price Associates
Maryland
$15.7M 541,221 -25,435 -4%
Morgan Stanley
15
Morgan Stanley
New York
$15.1M 522,112 -109,962 -17%
Renaissance Technologies
16
Renaissance Technologies
New York
$14.4M 495,000 -30,500 -6%
Pacer Advisors
17
Pacer Advisors
Pennsylvania
$13.9M 479,390 -870,978 -64%
Boston Partners
18
Boston Partners
Massachusetts
$11.9M 423,070 -3,566 -0.8%
Goldman Sachs
19
Goldman Sachs
New York
$11.8M 406,712 -21,123 -5%
GIP
20
Granite Investment Partners
California
$10.9M 375,778 -20,924 -5%
Invesco
21
Invesco
Georgia
$10.4M 359,143 +60,279 +20%
ECM
22
ExodusPoint Capital Management
New York
$9.95M 343,292 +343,292 New
SFM
23
Systematic Financial Management
New Jersey
$9.47M 326,546 +80,198 +33%
Charles Schwab
24
Charles Schwab
California
$9.46M 326,226 -21,286 -6%
American Century Companies
25
American Century Companies
Missouri
$8.93M 307,993 -164,024 -35%
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