Amphastar Pharmaceuticals Inc

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Amphastar Pharmaceuticals Inc
CIK #0001297184
EDGAR Form CIK 2011 - 2026
10-K [0001297184]
10-Q [0001297184]
3 [0001297184]
4 [0001297184]
8-K [0001297184]
SC 13G [0001297184]
Form 13D/13G Filer Form 13D/13G Subject Filed
Dimensional Fund Advisors LP Amphastar Pharmaceuticals Inc [2026-07-14]
Federated Hermes Inc Amphastar Pharmaceuticals Inc [2021-02-12]
Vanguard Group Inc Amphastar Pharmaceuticals Inc [2020-02-11]
BlackRock Inc Amphastar Pharmaceuticals Inc [2017-01-09]
Zhang Jack Y Amphastar Pharmaceuticals Inc [2015-02-12]
Broadfin Capital LLC Amphastar Pharmaceuticals Inc [2014-07-03]
Flynn James E Amphastar Pharmaceuticals Inc [2014-06-30]
Form 3/4/5 Subject 2011 - 2026
Amphastar Pharmaceuticals Inc
Deflin Gayle
Gerst Diane G
Zasloff Michael A
Lee Howard
Prins Richard K
Gaugh David Russell
Peters William J
Liawatidewi Yakob
Zhou Rong
View All
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Amphastar Pharmaceuticals Inc AMPH
Common Stock
2026-03-15 Tax withheld 2,908 $18.18 52,867
Amphastar Pharmaceuticals Inc AMPH
Common Stock
2026-03-15 Tax withheld 9,784 $18.18 177,873
Amphastar Pharmaceuticals Inc AMPH
Common Stock
2026-03-15 Tax withheld 1,033 $18.18 18,780
Amphastar Pharmaceuticals Inc AMPH
Common Stock
2026-03-15 Tax withheld 1,973 $18.18 35,869
Amphastar Pharmaceuticals Inc AMPH
Common Stock
2026-03-15 Tax withheld 1,225 $18.18 22,270
Amphastar Pharmaceuticals Inc AMPH
Common Stock
2026-03-10 Tax withheld 3,297 $18.91 62,346
Amphastar Pharmaceuticals Inc AMPH
Common Stock
2026-03-10 Tax withheld 2,215 $18.91 41,886
Amphastar Pharmaceuticals Inc AMPH
Common Stock
2026-03-10 Tax withheld 1,870 $18.91 35,362
Amphastar Pharmaceuticals Inc AMPH
Common Stock
2026-03-10 Tax withheld 14,785 $18.91 279,584
Amphastar Pharmaceuticals Inc AMPH
Common Stock
2026-03-10 Tax withheld 4,395 $18.91 83,109
Amphastar Pharmaceuticals Inc AMPH
Employee Stock Option (right to buy) · derivative
2026-03-09 Grant 121,071 $0.00
Amphastar Pharmaceuticals Inc AMPH
Employee Stock Option (right to buy) · derivative
2026-03-09 Grant 372,338 $0.00
Amphastar Pharmaceuticals Inc AMPH
Common Stock
2026-03-09 Grant 72,462 $0.00
Amphastar Pharmaceuticals Inc AMPH
Common Srock
2026-03-09 Grant 39,432 $0.00
Amphastar Pharmaceuticals Inc AMPH
Employee Stock Option (right to buy) · derivative
2026-03-09 Grant 149,472 $0.00
Amphastar Pharmaceuticals Inc AMPH
Common Stock
2026-03-09 Grant 58,693 $0.00
Amphastar Pharmaceuticals Inc AMPH
Common Stock
2026-03-09 Grant 180,504 $0.00
Amphastar Pharmaceuticals Inc AMPH
Common Stock
2026-03-09 Grant 35,450 $0.00
Amphastar Pharmaceuticals Inc AMPH
Employee Stock Option (right to buy) · derivative
2026-03-09 Grant 81,341 $0.00
Amphastar Pharmaceuticals Inc AMPH
Employee Stock Option (right to buy) · derivative
2026-03-09 Grant 73,126 $0.00
showing 20 of 200 most recent transactions
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