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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 %
BlackRock
1
BlackRock
New York
$130M 5,668,793 -478,865 -8%
Vanguard Group
2
Vanguard Group
Pennsylvania
$61.7M 2,686,950 +264,046 +11%
TD Asset Management
3
TD Asset Management
Ontario, Canada
$46.7M 2,034,930 -177,212 -8%
Dimensional Fund Advisors
4
Dimensional Fund Advisors
Texas
$37.4M 1,626,884 +270,524 +20%
State Street
5
State Street
Massachusetts
$36.2M 1,576,233 -28,381 -2%
Fuller & Thaler Asset Management
6
Fuller & Thaler Asset Management
California
$29M 1,263,772 +174 +0%
EIP
7
Epoch Investment Partners
New York
$28.5M 1,241,369 -19,938 -2%
BTW
8
Boston Trust Walden
Massachusetts
$27M 1,176,453 -39,171 -3%
Geode Capital Management
9
Geode Capital Management
Massachusetts
$22.3M 973,237 +18,161 +2%
Marshall Wace
10
Marshall Wace
United Kingdom
$19.5M 848,685 -183,037 -18%
Morgan Stanley
11
Morgan Stanley
New York
$15.6M 681,222 +159,110 +30%
Millennium Management
12
Millennium Management
New York
$14.2M 618,984 -249,567 -29%
Renaissance Technologies
13
Renaissance Technologies
New York
$13.2M 576,500 +81,500 +16%
Qube Research & Technologies (QRT)
14
Qube Research & Technologies (QRT)
United Kingdom
$10.8M 469,492 +210,511 +81%
Northern Trust
15
Northern Trust
Illinois
$9.67M 421,136 -173,301 -29%
Invesco
16
Invesco
Georgia
$8.88M 386,971 +27,828 +8%
Hotchkis & Wiley Capital Management
17
Hotchkis & Wiley Capital Management
California
$8.4M 365,920 +95,770 +35%
SFM
18
Systematic Financial Management
New Jersey
$8.25M 359,307 +32,761 +10%
Goldman Sachs
19
Goldman Sachs
New York
$8.18M 356,250 -50,462 -12%
Charles Schwab
20
Charles Schwab
California
$7.96M 346,784 +20,558 +6%
Pacer Advisors
21
Pacer Advisors
Pennsylvania
$7.49M 326,098 -153,292 -32%
Voloridge Investment Management
22
Voloridge Investment Management
Florida
$7.47M 325,512 +109,510 +51%
Royal Bank of Canada
23
Royal Bank of Canada
Ontario, Canada
$7.32M 318,717 +292,638 +1,122%
Bank of New York Mellon
24
Bank of New York Mellon
New York
$7.23M 314,803 +48,728 +18%
D.E. Shaw & Co
25
D.E. Shaw & Co
New York
$6.75M 293,928 +264,740 +907%
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