Common Stock, Shares, Outstanding of Amphastar Pharmaceuticals, Inc. from 31 Dec 2013 to 31 Dec 2025

Taxonomy & unit
us-gaap: shares
Description
Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.
Summary
Amphastar Pharmaceuticals, Inc. quarterly Common Stock, Shares, Outstanding in shares history and change rate from 31 Dec 2013 to 31 Dec 2025.
  • Amphastar Pharmaceuticals, Inc. Common Stock, Shares, Outstanding for the quarter ending 31 Dec 2025 was 45,645,497, a 4.1% decline year-over-year.
Source SEC data
View on sec.gov
Common Stock, Shares, Outstanding, Quarterly (shares)
Common Stock, Shares, Outstanding, YoY Quarterly Change (%)

Amphastar Pharmaceuticals, Inc. Quarterly Common Stock, Shares, Outstanding (shares)

Period Value YoY Chg Change % Date Report Filed Fiscal Year Fiscal Period
Q4 2025 45,645,497 -1,972,194 -4.1% 31 Dec 2025 10-K 26 Feb 2026 2025 FY
Q3 2025 46,348,863 -2,024,134 -4.2% 30 Sep 2025 10-Q 06 Nov 2025 2025 Q3
Q2 2025 46,490,609 -2,471,805 -5% 30 Jun 2025 10-Q 07 Aug 2025 2025 Q2
Q1 2025 47,670,177 -1,171,166 -2.4% 31 Mar 2025 10-Q 08 May 2025 2025 Q1
Q4 2024 47,617,691 -451,190 -0.94% 31 Dec 2024 10-K 26 Feb 2026 2025 FY
Q3 2024 48,372,997 +474,531 +0.99% 30 Sep 2024 10-Q 07 Nov 2024 2024 Q3
Q2 2024 48,962,414 +143,608 +0.29% 30 Jun 2024 10-Q 09 Aug 2024 2024 Q2
Q1 2024 48,841,343 +662,105 +1.4% 31 Mar 2024 10-Q 10 May 2024 2024 Q1
Q4 2023 48,068,881 -43,188 -0.09% 31 Dec 2023 10-K 03 Mar 2025 2024 FY
Q3 2023 47,898,466 -714,079 -1.5% 30 Sep 2023 10-Q 08 Nov 2023 2023 Q3
Q2 2023 48,818,806 -173,483 -0.35% 30 Jun 2023 10-Q 09 Aug 2023 2023 Q2
Q1 2023 48,179,238 -572,937 -1.2% 31 Mar 2023 10-Q 09 May 2023 2023 Q1
Q4 2022 48,112,069 +397,157 +0.83% 31 Dec 2022 10-K 29 Feb 2024 2023 FY
Q3 2022 48,612,545 +629,855 +1.3% 30 Sep 2022 10-Q 08 Nov 2022 2022 Q3
Q2 2022 48,992,289 +1,008,740 +2.1% 30 Jun 2022 10-Q 09 Aug 2022 2022 Q2
Q1 2022 48,752,175 +1,034,172 +2.2% 31 Mar 2022 10-Q 10 May 2022 2022 Q1
Q4 2021 47,714,912 +219,473 +0.46% 31 Dec 2021 10-K 01 Mar 2023 2022 FY
Q3 2021 47,982,690 +448,475 +0.94% 30 Sep 2021 10-Q 09 Nov 2021 2021 Q3
Q2 2021 47,983,549 +488,640 +1% 30 Jun 2021 10-Q 09 Aug 2021 2021 Q2
Q1 2021 47,718,003 +1,411,900 +3% 31 Mar 2021 10-Q 07 May 2021 2021 Q1
Q4 2020 47,495,439 +918,471 +2% 31 Dec 2020 10-K 11 Mar 2022 2021 FY
Q3 2020 47,534,215 +334,308 +0.71% 30 Sep 2020 10-Q 06 Nov 2020 2020 Q3
Q2 2020 47,494,909 +277,234 +0.59% 30 Jun 2020 10-Q 07 Aug 2020 2020 Q2
Q1 2020 46,306,103 -792,521 -1.7% 31 Mar 2020 10-Q 11 May 2020 2020 Q1
Q4 2019 46,576,968 -54,150 -0.12% 31 Dec 2019 10-K 15 Mar 2021 2020 FY
Q3 2019 47,199,907 +1,040,255 +2.3% 30 Sep 2019 10-Q 08 Nov 2019 2019 Q3
Q2 2019 47,217,675 +800,886 +1.7% 30 Jun 2019 10-Q 09 Aug 2019 2019 Q2
Q1 2019 47,098,624 +441,831 +0.95% 31 Mar 2019 10-Q 10 May 2019 2019 Q1
Q4 2018 46,631,118 +7,537 +0.02% 31 Dec 2018 10-K 16 Mar 2020 2019 FY
Q3 2018 46,159,652 +263,259 +0.57% 30 Sep 2018 10-Q 09 Nov 2018 2018 Q3
Q2 2018 46,416,789 +167,844 +0.36% 30 Jun 2018 10-Q 09 Aug 2018 2018 Q2
Q1 2018 46,656,793 +698,549 +1.5% 31 Mar 2018 10-Q 10 May 2018 2018 Q1
Q4 2017 46,623,581 +374,959 +0.81% 31 Dec 2017 10-K 15 Mar 2019 2018 FY
Q3 2017 45,896,393 -141,629 -0.31% 30 Sep 2017 10-Q 09 Nov 2017 2017 Q3
Q2 2017 46,248,945 +1,157,613 +2.6% 30 Jun 2017 10-Q 09 Aug 2017 2017 Q2
Q1 2017 45,958,244 +1,016,143 +2.3% 31 Mar 2017 10-Q 10 May 2017 2017 Q1
Q4 2016 46,248,622 +1,050,131 +2.3% 31 Dec 2016 10-K 14 Mar 2018 2017 FY
Q3 2016 46,038,022 +831,511 +1.8% 30 Sep 2016 10-Q 09 Nov 2016 2016 Q3
Q2 2016 45,091,332 -238,136 -0.52% 30 Jun 2016 10-Q 09 Aug 2016 2016 Q2
Q1 2016 44,942,101 +280,064 +0.63% 31 Mar 2016 10-Q 10 May 2016 2016 Q1
Q4 2015 45,198,491 +551,724 +1.2% 31 Dec 2015 10-K 15 Mar 2017 2016 FY
Q3 2015 45,206,511 +561,074 +1.3% 30 Sep 2015 10-Q 13 Nov 2015 2015 Q3
Q2 2015 45,329,468 +693,528 +1.6% 30 Jun 2015 10-Q 13 Aug 2015 2015 Q2
Q1 2015 44,662,037 31 Mar 2015 10-Q 14 May 2015 2015 Q1
Q4 2014 44,646,767 +5,880,827 +15% 31 Dec 2014 10-K 15 Mar 2016 2015 FY
Q3 2014 44,645,437 30 Sep 2014 10-Q 13 Nov 2014 2014 Q3
Q2 2014 44,635,940 30 Jun 2014 10-Q 13 Aug 2014 2014 Q2
Q4 2013 38,765,940 31 Dec 2013 10-K 26 Mar 2015 2014 FY
* An asterisk sign (*) next to the value indicates that the value is likely invalid.