Search
Amphastar Pharmaceuticals Inc
AMPHAdd to Watchlist
19.940USD
-0.440-2.16%
Close 07-31 16:00（ET）Quotes delayed by 15 min
879.21MMarket Cap
11.66P/E TTM
Shareholding Stats
Updated: Thu, May 14
Updated: Thu, May 14
Shareholders
Shareholder Types
Shareholders
Shareholders
Proportion
Applied Physics & Chemistry Laboratories, Inc.
15.48%
BlackRock Institutional Trust Company, N.A.
11.21%
Zhang (Jack Yongfeng)
7.44%
Luo (Mary Z)
5.25%
Dimensional Fund Advisors, L.P.
4.60%
Other
56.02%
Shareholders
Shareholders
Proportion
Applied Physics & Chemistry Laboratories, Inc.
15.48%
BlackRock Institutional Trust Company, N.A.
11.21%
Zhang (Jack Yongfeng)
7.44%
Luo (Mary Z)
5.25%
Dimensional Fund Advisors, L.P.
4.60%
Other
56.02%
Shareholder Types
Shareholders
Proportion
Investment Advisor
43.87%
Investment Advisor/Hedge Fund
26.15%
Corporation
15.48%
Individual Investor
14.15%
Hedge Fund
5.05%
Research Firm
3.01%
Pension Fund
1.19%
Bank and Trust
0.44%
Family Office
0.28%
Institutional Shareholding
Updated: Wed, Apr 1
Updated: Wed, Apr 1
Reporting Period
No. of institutions
Shares Held
Proportion
Change
2026Q1
582
35.15M
79.72%
-4.41M
2025Q4
586
33.97M
85.20%
+16.67K
2025Q3
603
33.96M
84.80%
+202.84K
2025Q2
607
33.74M
83.87%
-544.61K
2025Q1
597
34.53M
80.40%
-3.80M
2024Q4
593
35.69M
79.40%
-112.11K
2024Q3
575
35.68M
75.48%
+965.70K
2024Q2
565
34.64M
73.86%
+833.26K
2024Q1
548
33.97M
73.49%
-1.92M
2023Q4
531
33.91M
72.12%
+1.03M
View more
Shareholder Activity
Name
Shares Held
Proportion
Change
Chg %
Date
Applied Physics & Chemistry Laboratories, Inc.
6.83M
15.05%
--
--
Mar 31, 2025
BlackRock Institutional Trust Company, N.A.
4.94M
10.9%
+5.03K
+0.10%
Dec 31, 2025
Zhang (Jack Yongfeng)
2.77M
6.1%
+142.39K
+5.43%
Mar 15, 2026
Luo (Mary Z)
1.09M
2.4%
+69.40K
+6.79%
Mar 31, 2025
Dimensional Fund Advisors, L.P.
1.80M
3.97%
+44.02K
+2.51%
Dec 31, 2025
TD Asset Management Inc.
1.96M
4.33%
+31.16K
+1.61%
Dec 31, 2025
State Street Investment Management (US)
1.53M
3.38%
+31.04K
+2.07%
Dec 31, 2025
Fuller & Thaler Asset Management Inc.
1.39M
3.07%
+40.54K
+2.99%
Dec 31, 2025
Marshall Wace LLP
1.24M
2.73%
+363.22K
+41.55%
Dec 31, 2025
View more
Related ETFs
Updated: Sat, Dec 6
Updated: Sat, Dec 6
Name
Proportion
Invesco Pharmaceuticals ETF
2.25%
State Street SPDR S&P Pharmaceuticals ETF
1.47%
Direxion Daily Pharmaceutical & Medical Bl 3X ETF
1.38%
Invesco S&P SmallCap 600 GARP ETF
1.12%
Acquirers Small and Micro Deep Value ETF
0.87%
Pacer US Small Cap Cash Cows Growth Leaders ETF
0.77%
Invesco S&P SmallCap Health Care ETF
0.56%
First Trust Small Cap Value AlphaDEX Fund
0.5%
Distillate Small/Mid Cash Flow ETF
0.45%
VictoryShares Small Cap Free Cash Flow ETF
0.37%
View more
Invesco Pharmaceuticals ETF
Proportion2.25%
State Street SPDR S&P Pharmaceuticals ETF
Proportion1.47%
Direxion Daily Pharmaceutical & Medical Bl 3X ETF
Proportion1.38%
Invesco S&P SmallCap 600 GARP ETF
Proportion1.12%
Acquirers Small and Micro Deep Value ETF
Proportion0.87%
Pacer US Small Cap Cash Cows Growth Leaders ETF
Proportion0.77%
Invesco S&P SmallCap Health Care ETF
Proportion0.56%
First Trust Small Cap Value AlphaDEX Fund
Proportion0.5%
Distillate Small/Mid Cash Flow ETF
Proportion0.45%
VictoryShares Small Cap Free Cash Flow ETF
Proportion0.37%