Weighted Average Number of Shares Outstanding, Basic of Amphastar Pharmaceuticals, Inc. from 31 Dec 2012 to 31 Dec 2025

Taxonomy & unit
us-gaap: shares
Description
Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.
Summary
Amphastar Pharmaceuticals, Inc. quarterly and annual Weighted Average Number of Shares Outstanding, Basic in shares history and change rate from 31 Dec 2012 to 31 Dec 2025.
  • Amphastar Pharmaceuticals, Inc. Weighted Average Number of Shares Outstanding, Basic for the quarter ending 31 Dec 2025 was 46,743,000, a 3.5% decline year-over-year.
  • Amphastar Pharmaceuticals, Inc. annual Weighted Average Number of Shares Outstanding, Basic for 2025 was 46,743,000, a 3.5% decline from 2024.
  • Amphastar Pharmaceuticals, Inc. annual Weighted Average Number of Shares Outstanding, Basic for 2024 was 48,429,000, a 0.34% increase from 2023.
  • Amphastar Pharmaceuticals, Inc. annual Weighted Average Number of Shares Outstanding, Basic for 2023 was 48,265,000, a 0.59% decline from 2022.
Source SEC data
View on sec.gov
Weighted Average Number of Shares Outstanding, Basic, Quarterly (shares)
Weighted Average Number of Shares Outstanding, Basic, YoY Quarterly Change (%)
Weighted Average Number of Shares Outstanding, Basic, Annual (shares)
Weighted Average Number of Shares Outstanding, Basic, YoY Annual Change (%)

Amphastar Pharmaceuticals, Inc. Quarterly Weighted Average Number of Shares Outstanding, Basic (shares)

Period TTM Value Value YoY Chg Change % Start Date End Date Report Filed Fiscal Year Fiscal Period
Q4 2025 46,743,000 -1,686,000 -3.5% 01 Oct 2025 31 Dec 2025 10-K 26 Feb 2026 2025 FY
Q3 2025 46,474,000 -2,147,000 -4.4% 01 Jul 2025 30 Sep 2025 10-Q 06 Nov 2025 2025 Q3
Q2 2025 46,949,000 -1,958,000 -4% 01 Apr 2025 30 Jun 2025 10-Q 07 Aug 2025 2025 Q2
Q1 2025 47,641,000 -571,000 -1.2% 01 Jan 2025 31 Mar 2025 10-Q 08 May 2025 2025 Q1
Q4 2024 48,429,000 +164,000 +0.34% 01 Oct 2024 31 Dec 2024 10-K 26 Feb 2026 2025 FY
Q3 2024 48,621,000 -80,000 -0.16% 01 Jul 2024 30 Sep 2024 10-Q 06 Nov 2025 2025 Q3
Q2 2024 48,907,000 +503,000 +1% 01 Apr 2024 30 Jun 2024 10-Q 07 Aug 2025 2025 Q2
Q1 2024 48,212,000 +212,000 +0.44% 01 Jan 2024 31 Mar 2024 10-Q 08 May 2025 2025 Q1
Q4 2023 48,265,000 -286,000 -0.59% 01 Oct 2023 31 Dec 2023 10-K 26 Feb 2026 2025 FY
Q3 2023 48,701,000 -203,000 -0.42% 01 Jul 2023 30 Sep 2023 10-Q 07 Nov 2024 2024 Q3
Q2 2023 48,404,000 -460,000 -0.94% 01 Apr 2023 30 Jun 2023 10-Q 09 Aug 2024 2024 Q2
Q1 2023 48,000,000 -138,000 -0.29% 01 Jan 2023 31 Mar 2023 10-Q 10 May 2024 2024 Q1
Q4 2022 48,551,000 +774,000 +1.6% 01 Oct 2022 31 Dec 2022 10-K 03 Mar 2025 2024 FY
Q3 2022 48,904,000 +882,000 +1.8% 01 Jul 2022 30 Sep 2022 10-Q 08 Nov 2023 2023 Q3
Q2 2022 48,864,000 +1,133,000 +2.4% 01 Apr 2022 30 Jun 2022 10-Q 09 Aug 2023 2023 Q2
Q1 2022 48,138,000 +618,000 +1.3% 01 Jan 2022 31 Mar 2022 10-Q 09 May 2023 2023 Q1
Q4 2021 47,777,000 +739,000 +1.6% 01 Oct 2021 31 Dec 2021 10-K 29 Feb 2024 2023 FY
Q3 2021 48,022,000 +526,000 +1.1% 01 Jul 2021 30 Sep 2021 10-Q 08 Nov 2022 2022 Q3
Q2 2021 47,731,000 +978,000 +2.1% 01 Apr 2021 30 Jun 2021 10-Q 09 Aug 2022 2022 Q2
Q1 2021 47,520,000 +1,112,000 +2.4% 01 Jan 2021 31 Mar 2021 10-Q 10 May 2022 2022 Q1
Q4 2020 47,038,000 +198,000 +0.42% 01 Oct 2020 31 Dec 2020 10-K 01 Mar 2023 2022 FY
Q3 2020 47,496,000 +257,000 +0.54% 01 Jul 2020 30 Sep 2020 10-Q 09 Nov 2021 2021 Q3
Q2 2020 46,753,000 -354,000 -0.75% 01 Apr 2020 30 Jun 2020 10-Q 09 Aug 2021 2021 Q2
Q1 2020 46,408,000 -336,000 -0.72% 01 Jan 2020 31 Mar 2020 10-Q 07 May 2021 2021 Q1
Q4 2019 46,840,000 +572,000 +1.2% 01 Oct 2019 31 Dec 2019 10-K 16 Mar 2020 2019 FY
Q3 2019 47,239,000 +998,000 +2.2% 01 Jul 2019 30 Sep 2019 10-Q 06 Nov 2020 2020 Q3
Q2 2019 47,107,000 +550,000 +1.2% 01 Apr 2019 30 Jun 2019 10-Q 07 Aug 2020 2020 Q2
Q1 2019 46,744,000 +230,000 +0.49% 01 Jan 2019 31 Mar 2019 10-Q 11 May 2020 2020 Q1
Q4 2018 46,268,000 +35,000 +0.08% 01 Oct 2018 31 Dec 2018 10-K 16 Mar 2020 2019 FY
Q3 2018 46,241,000 +140,000 +0.3% 01 Jul 2018 30 Sep 2018 10-K 16 Mar 2020 2019 FY
Q2 2018 46,557,000 +532,000 +1.2% 01 Apr 2018 30 Jun 2018 10-K 16 Mar 2020 2019 FY
Q1 2018 46,514,000 +445,000 +0.97% 01 Jan 2018 31 Mar 2018 10-K 16 Mar 2020 2019 FY
Q4 2017 46,233,000 +129,000 +0.28% 01 Oct 2017 31 Dec 2017 10-K 15 Mar 2019 2018 FY
Q3 2017 46,101,000 +703,000 +1.5% 01 Jul 2017 30 Sep 2017 10-K 15 Mar 2019 2018 FY
Q2 2017 46,025,000 +1,068,000 +2.4% 01 Apr 2017 30 Jun 2017 10-K 15 Mar 2019 2018 FY
Q1 2017 46,069,000 +1,028,000 +2.3% 01 Jan 2017 31 Mar 2017 10-K 15 Mar 2019 2018 FY
Q4 2016 46,104,000 +1,019,000 +2.3% 01 Oct 2016 31 Dec 2016 10-K 14 Mar 2018 2017 FY
Q3 2016 45,398,000 +88,000 +0.19% 01 Jul 2016 30 Sep 2016 10-K 14 Mar 2018 2017 FY
Q2 2016 44,957,000 +108,000 +0.24% 01 Apr 2016 30 Jun 2016 10-K 14 Mar 2018 2017 FY
Q1 2016 45,041,000 +440,000 +0.99% 01 Jan 2016 31 Mar 2016 10-K 14 Mar 2018 2017 FY
Q4 2015 45,085,000 +437,000 +0.98% 01 Oct 2015 31 Dec 2015 10-K 15 Mar 2017 2016 FY
Q3 2015 45,310,000 +666,000 +1.5% 01 Jul 2015 30 Sep 2015 10-K 15 Mar 2017 2016 FY
Q2 2015 44,849,000 +5,082,000 +13% 01 Apr 2015 30 Jun 2015 10-K 15 Mar 2017 2016 FY
Q1 2015 44,601,000 +5,832,000 +15% 01 Jan 2015 31 Mar 2015 10-K 15 Mar 2017 2016 FY
Q4 2014 44,648,000 +5,924,000 +15% 01 Oct 2014 31 Dec 2014 10-K 15 Mar 2016 2015 FY
Q3 2014 44,644,000 +5,935,000 +15% 01 Jul 2014 30 Sep 2014 10-K 15 Mar 2016 2015 FY
Q2 2014 39,767,000 +1,059,000 +2.7% 01 Apr 2014 30 Jun 2014 10-K 15 Mar 2016 2015 FY
Q1 2014 38,769,000 +62,000 +0.16% 01 Jan 2014 31 Mar 2014 10-K 15 Mar 2016 2015 FY
Q4 2013 38,724,000 01 Oct 2013 31 Dec 2013 10-K 26 Mar 2015 2014 FY
Q3 2013 38,709,000 01 Jul 2013 30 Sep 2013 10-K 26 Mar 2015 2014 FY
Q2 2013 38,708,000 01 Apr 2013 30 Jun 2013 10-K 26 Mar 2015 2014 FY
Q1 2013 38,707,000 01 Jan 2013 31 Mar 2013 10-K 26 Mar 2015 2014 FY

Amphastar Pharmaceuticals, Inc. Annual Weighted Average Number of Shares Outstanding, Basic (shares)

Period Value YoY Chg Change % Start Date End Date Report Filed Fiscal Year Fiscal Period
2025 46,743,000 -1,686,000 -3.5% 01 Jan 2025 31 Dec 2025 10-K 26 Feb 2026 2025 FY
2024 48,429,000 +164,000 +0.34% 01 Jan 2024 31 Dec 2024 10-K 26 Feb 2026 2025 FY
2023 48,265,000 -286,000 -0.59% 01 Jan 2023 31 Dec 2023 10-K 26 Feb 2026 2025 FY
2022 48,551,000 +774,000 +1.6% 01 Jan 2022 31 Dec 2022 10-K 03 Mar 2025 2024 FY
2021 47,777,000 +739,000 +1.6% 01 Jan 2021 31 Dec 2021 10-K 29 Feb 2024 2023 FY
2020 47,038,000 +56,000 +0.12% 01 Jan 2020 31 Dec 2020 10-K 01 Mar 2023 2022 FY
2019 46,982,000 +587,000 +1.3% 01 Jan 2019 31 Dec 2019 10-K 11 Mar 2022 2021 FY
2018 46,395,000 +288,000 +0.62% 01 Jan 2018 31 Dec 2018 10-K 15 Mar 2021 2020 FY
2017 46,107,000 +732,000 +1.6% 01 Jan 2017 31 Dec 2017 10-K 16 Mar 2020 2019 FY
2016 45,375,000 +414,000 +0.92% 01 Jan 2016 31 Dec 2016 10-K 15 Mar 2019 2018 FY
2015 44,961,000 +3,004,000 +7.2% 01 Jan 2015 31 Dec 2015 10-K 14 Mar 2018 2017 FY
2014 41,957,000 +3,245,000 +8.4% 01 Jan 2014 31 Dec 2014 10-K 15 Mar 2017 2016 FY
2013 38,712,000 +132,000 +0.34% 01 Jan 2013 31 Dec 2013 10-K 15 Mar 2016 2015 FY
2012 38,580,000 01 Jan 2012 31 Dec 2012 10-K 26 Mar 2015 2014 FY
* An asterisk sign (*) next to the value indicates that the value is likely invalid.