Entity Common Stock, Shares Outstanding of Amphastar Pharmaceuticals, Inc. from 08 Aug 2014 to 20 Feb 2026

Taxonomy & unit
dei: shares
Description
Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.
Summary
Amphastar Pharmaceuticals, Inc. quarterly Entity Common Stock, Shares Outstanding in shares history and change rate from 08 Aug 2014 to 20 Feb 2026.
  • Amphastar Pharmaceuticals, Inc. Entity Common Stock, Shares Outstanding for the quarter ending 20 Feb 2026 was 45,370,171, a 3.8% decline year-over-year.
Source SEC data
View on sec.gov
Entity Common Stock, Shares Outstanding, Quarterly (shares)
Entity Common Stock, Shares Outstanding, YoY Quarterly Change (%)

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

Period Value YoY Chg Change % Date Report Filed Fiscal Year Fiscal Period
Q1 2026 45,370,171 -1,768,914 -3.8% 20 Feb 2026 10-K 26 Feb 2026 2025 FY
Q3 2025 45,952,174 -2,129,259 -4.4% 31 Oct 2025 10-Q 06 Nov 2025 2025 Q3
Q2 2025 46,495,077 -2,180,745 -4.5% 01 Aug 2025 10-Q 07 Aug 2025 2025 Q2
Q1 2025 47,139,085 -1,762,880 -3.6% 01 May 2025 10-Q 08 May 2025 2025 Q1
Q3 2024 48,081,433 +174,022 +0.36% 01 Nov 2024 10-Q 07 Nov 2024 2024 Q3
Q2 2024 48,675,822 -179,780 -0.37% 02 Aug 2024 10-Q 09 Aug 2024 2024 Q2
Q1 2024 48,901,965 +627,923 +1.3% 03 May 2024 10-Q 10 May 2024 2024 Q1
Q3 2023 47,907,411 -423,775 -0.88% 02 Nov 2023 10-Q 08 Nov 2023 2023 Q3
Q2 2023 48,855,602 -159,570 -0.33% 02 Aug 2023 10-Q 09 Aug 2023 2023 Q2
Q1 2023 48,274,042 +127,177 +0.26% 03 May 2023 10-Q 09 May 2023 2023 Q1
Q3 2022 48,331,186 +482,041 +1% 01 Nov 2022 10-Q 08 Nov 2022 2022 Q3
Q2 2022 49,015,172 +983,504 +2% 02 Aug 2022 10-Q 09 Aug 2022 2022 Q2
Q1 2022 48,146,865 +713,928 +1.5% 04 Mar 2022 10-K 11 Mar 2022 2021 FY
Q3 2021 47,849,145 +345,126 +0.73% 02 Nov 2021 10-Q 09 Nov 2021 2021 Q3
Q2 2021 48,031,668 +546,122 +1.2% 02 Aug 2021 10-Q 09 Aug 2021 2021 Q2
Q1 2021 47,432,937 +1,194,634 +2.6% 08 Mar 2021 10-K 15 Mar 2021 2020 FY
Q3 2020 47,504,019 +565,992 +1.2% 02 Nov 2020 10-Q 06 Nov 2020 2020 Q3
Q2 2020 47,485,546 +259,050 +0.55% 03 Aug 2020 10-Q 07 Aug 2020 2020 Q2
Q1 2020 46,238,303 -550,508 -1.2% 09 Mar 2020 10-K 16 Mar 2020 2019 FY
Q3 2019 46,938,027 +839,560 +1.8% 01 Nov 2019 10-Q 08 Nov 2019 2019 Q3
Q2 2019 47,226,496 +970,042 +2.1% 02 Aug 2019 10-Q 09 Aug 2019 2019 Q2
Q1 2019 46,788,811 +438,216 +0.94% 08 Mar 2019 10-K 15 Mar 2019 2018 FY
Q3 2018 46,098,467 +122,721 +0.27% 02 Nov 2018 10-Q 09 Nov 2018 2018 Q3
Q2 2018 46,256,454 +60,512 +0.13% 02 Aug 2018 10-Q 09 Aug 2018 2018 Q2
Q1 2018 46,350,595 +440,479 +0.96% 06 Mar 2018 10-K 14 Mar 2018 2017 FY
Q3 2017 45,975,746 -48,052 -0.1% 02 Nov 2017 10-Q 09 Nov 2017 2017 Q3
Q2 2017 46,195,942 +1,074,784 +2.4% 02 Aug 2017 10-Q 09 Aug 2017 2017 Q2
Q1 2017 45,910,116 +996,188 +2.2% 08 Mar 2017 10-K 15 Mar 2017 2016 FY
Q3 2016 46,023,798 +1,004,273 +2.2% 02 Nov 2016 10-Q 09 Nov 2016 2016 Q3
Q2 2016 45,121,158 -216,223 -0.48% 02 Aug 2016 10-Q 09 Aug 2016 2016 Q2
Q1 2016 44,913,928 +349,261 +0.78% 08 Mar 2016 10-K 15 Mar 2016 2015 FY
Q3 2015 45,019,525 +370,727 +0.83% 09 Nov 2015 10-Q 13 Nov 2015 2015 Q3
Q2 2015 45,337,381 +693,222 +1.6% 10 Aug 2015 10-Q 13 Aug 2015 2015 Q2
Q1 2015 44,564,667 18 Mar 2015 10-K 26 Mar 2015 2014 FY
Q3 2014 44,648,798 10 Nov 2014 10-Q 13 Nov 2014 2014 Q3
Q2 2014 44,644,159 08 Aug 2014 10-Q 13 Aug 2014 2014 Q2
* An asterisk sign (*) next to the value indicates that the value is likely invalid.