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Amphastar Pharma
AMPH
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Overview
Overview
News
News
Posts
Posts
Financials
Financials
Forecast
Forecast
Valuation
Valuation
Shareholders
Shareholders
Profile
Profile
All Shareholders
Institutional Holders
Insiders
All Shareholders
Shareholder Type
Institutions
68.04%
Private companies
16.05%
Individuals & Insiders
10.36%
Public and others
5.52%
State-owned enterprises
0.02%
Major Shareholders
Latest
Major Shareholders Latest
Shareholder
% Held
Shares Held
Change %
Shares Changed
Report Date
Applied Physics & Chemistry Laboratories, Inc.
16.05%
6.83M
0.75%
+0
03/31/2026
BlackRock, Inc.
12.28%
5.22M
0.14%
-196.41K
06/30/2026
Yongfeng Zhang
Co-founder, President, CEO, Chief Scientific Officer & Director
6.28%
2.67M
0.30%
+0
03/31/2026
Dimensional Fund Advisors LP
5.42%
2.31M
0.88%
+277.16K
06/30/2026
Vanguard Capital Management, LLC
4.01%
1.71M
0.04%
-68.27K
06/30/2026
State Street Investment Management
3.86%
1.64M
0.26%
+34.61K
06/30/2026
American Century Investment Management Inc
2.77%
1.18M
0.49%
+159.09K
06/30/2026
Ziping Luo
Chairman of the Board, Chief Scientist & COO
2.62%
1.11M
0.12%
+0
03/31/2026
Marshall Wace LLP
2.51%
1.07M
0.21%
+40.68K
06/30/2026
Geode Capital Management, LLC
2.28%
969.84K
0.09%
-6.81K
06/30/2026
Fuller & Thaler Asset Management, Inc.
2.23%
949.24K
0.89%
-445.90K
06/30/2026
D. E. Shaw & Co., L.P.
2.09%
887.05K
0.59%
+221.51K
06/30/2026
Vanguard Portfolio Management, LLC
1.90%
809.57K
0.14%
+21.75K
06/30/2026
LSV Asset Management
1.51%
642.01K
0.05%
-9.70K
06/30/2026
Renaissance Technologies LLC
1.23%
525.10K
<0.01%
-28.80K
06/30/2026
Bridgeway Capital Management, LLC
1.09%
461.77K
0.05%
-43.01K
06/30/2026
Systematic Financial Management LP
1.03%
437.38K
0.01%
-15.51K
06/30/2026
UBS Asset Management AG
1.03%
437.17K
0.04%
-38.47K
06/30/2026
Hudson River Trading LLC
0.91%
387.53K
0.79%
+331.35K
06/30/2026
Denali Advisors, LLC
0.88%
375.97K
0.29%
+109.50K
06/30/2026