Amphastar Pharmaceuticals, Inc. Basic Shares Outstanding (Weighted Average)
Amphastar Pharmaceuticals, Inc. (AMPH) reported Basic Shares Outstanding (Weighted Average) of 43.64 million shares for the 3-month period ending 2026-06-30, per its 10-Q filed 2026-08-06.
Financial Statements › Income Statement › Earnings Per Share
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic · last filed 2026-08-06
- Amphastar Pharmaceuticals, Inc. weighted average number of shares outstanding, basic for the quarter ending 2026-06-30 was 43.64M shares, a 7.04% decline year-over-year.
- Amphastar Pharmaceuticals, Inc. weighted average number of shares outstanding, basic for the quarter ending 2026-03-31 was 45.32M shares, a 4.87% decline year-over-year.
- Amphastar Pharmaceuticals, Inc. weighted average number of shares outstanding, basic for the quarter ending 2025-12-31 was 45.91M shares, a 4.31% decline year-over-year.
- Amphastar Pharmaceuticals, Inc. weighted average number of shares outstanding, basic for the quarter ending 2025-09-30 was 46.47M shares, a 4.42% decline year-over-year.
- Amphastar Pharmaceuticals, Inc. weighted average number of shares outstanding, basic for fiscal 2025 was 46.74M shares, a 3.48% decline from fiscal 2024.
- Amphastar Pharmaceuticals, Inc. weighted average number of shares outstanding, basic for fiscal 2024 was 48.43M shares, a 0.34% increase from fiscal 2023.
- Amphastar Pharmaceuticals, Inc. weighted average number of shares outstanding, basic for fiscal 2023 was 48.27M shares, a 0.59% decline from fiscal 2022.
- Amphastar Pharmaceuticals, Inc. weighted average number of shares outstanding, basic for fiscal 2022 was 48.55M shares, a 1.62% increase from fiscal 2021.
| Period end | Weighted Average Number of Shares Outstanding, Basic 3 month | Weighted Average Number of Shares Outstanding, Basic 3 month as first filed | Weighted Average Number of Shares Outstanding, Basic 6 month | Weighted Average Number of Shares Outstanding, Basic 9 month | Weighted Average Number of Shares Outstanding, Basic 12 month |
|---|---|---|---|---|---|
| 2026-06-30 | 43.64M shares 10-Q · filed 2026-08-06 | 44.48M shares 10-Q · filed 2026-08-06 | 44.96M shares derived: average of 3 quarters · filed 2026-08-06 | 45.34M shares derived: average of 4 quarters · filed 2026-08-06 | |
| 2026-03-31 | 45.32M shares 10-Q · filed 2026-05-07 | 45.62M shares derived: average of 2 quarters · filed 2026-05-07 | 45.90M shares derived: average of 3 quarters · filed 2026-05-07 | 46.16M shares derived: average of 4 quarters · filed 2026-08-06 | |
| 2025-12-31 | 45.91M shares derived: 10-K 12 month − 10-Q 9 month · filed 2026-02-26 | 46.19M shares derived: average of 2 quarters · filed 2026-02-26 | 46.44M shares derived: average of 3 quarters · filed 2026-08-06 | 46.74M shares 10-K · filed 2026-02-26 | |
| 2025-09-30 | 46.47M shares 10-Q · filed 2025-11-06 | 46.71M shares derived: average of 2 quarters · filed 2026-08-06 | 47.02M shares 10-Q · filed 2025-11-06 | 47.26M shares derived: average of 4 quarters · filed 2026-08-06 | |
| 2025-06-30 | 46.95M shares 10-Q · filed 2026-08-06 | 47.30M shares 10-Q · filed 2026-08-06 | 47.52M shares derived: average of 3 quarters · filed 2026-08-06 | 47.80M shares derived: average of 4 quarters · filed 2026-08-06 | |
| 2025-03-31 | 47.64M shares 10-Q · filed 2026-05-07 | 47.81M shares derived: average of 2 quarters · filed 2026-05-07 | 48.08M shares derived: average of 3 quarters · filed 2026-05-07 | 48.29M shares derived: average of 4 quarters · filed 2026-05-07 | |
| 2024-12-31 | 47.98M shares derived: 10-K 12 month − 10-Q 9 month · filed 2026-02-26 | 48.30M shares derived: average of 2 quarters · filed 2026-02-26 | 48.50M shares derived: average of 3 quarters · filed 2026-02-26 | 48.43M shares 10-K · filed 2026-02-26 | |
| 2024-09-30 | 48.62M shares 10-Q · filed 2025-11-06 | 48.76M shares derived: average of 2 quarters · filed 2025-11-06 | 48.58M shares 10-Q · filed 2025-11-06 | 48.42M shares derived: average of 4 quarters · filed 2026-02-26 | |
| 2024-06-30 | 48.91M shares 10-Q · filed 2025-08-07 | 48.56M shares 10-Q · filed 2025-08-07 | 48.36M shares derived: average of 3 quarters · filed 2026-02-26 | 48.44M shares derived: average of 4 quarters · filed 2026-02-26 | |
| 2024-03-31 | 48.21M shares 10-Q · filed 2025-05-08 | 48.08M shares derived: average of 2 quarters · filed 2026-02-26 | 48.29M shares derived: average of 3 quarters · filed 2026-02-26 | 48.32M shares derived: average of 4 quarters · filed 2026-02-26 | |
| 2023-12-31 | 47.96M shares derived: 10-K 12 month − 10-Q 9 month · filed 2026-02-26 | 48.33M shares derived: average of 2 quarters · filed 2026-02-26 | 48.35M shares derived: average of 3 quarters · filed 2026-02-26 | 48.27M shares 10-K · filed 2026-02-26 | |
| 2023-09-30 | 48.70M shares 10-Q · filed 2024-11-07 | 48.55M shares derived: average of 2 quarters · filed 2024-11-07 | 48.37M shares 10-Q · filed 2024-11-07 | 48.35M shares derived: average of 4 quarters · filed 2025-03-03 | |
| 2023-06-30 | 48.40M shares 10-Q · filed 2024-08-09 | 48.20M shares 10-Q · filed 2024-08-09 | 48.23M shares derived: average of 3 quarters · filed 2025-03-03 | 48.40M shares derived: average of 4 quarters · filed 2025-03-03 | |
| 2023-03-31 | 48.00M shares 10-Q · filed 2024-05-10 | 48.15M shares derived: average of 2 quarters · filed 2025-03-03 | 48.40M shares derived: average of 3 quarters · filed 2025-03-03 | 48.52M shares derived: average of 4 quarters · filed 2025-03-03 | |
| 2022-12-31 | 48.30M shares derived: 10-K 12 month − 10-Q 9 month · filed 2025-03-03 | 48.60M shares derived: average of 2 quarters · filed 2025-03-03 | 48.69M shares derived: average of 3 quarters · filed 2025-03-03 | 48.55M shares 10-K · filed 2025-03-03 | |
| 2022-09-30 | 48.90M shares 10-Q · filed 2023-11-08 | 48.88M shares derived: average of 2 quarters · filed 2023-11-08 | 48.63M shares 10-Q · filed 2023-11-08 | 48.44M shares derived: average of 4 quarters · filed 2024-02-29 | |
| 2022-06-30 | 48.86M shares 10-Q · filed 2023-08-09 | 48.50M shares 10-Q · filed 2023-08-09 | 48.28M shares derived: average of 3 quarters · filed 2024-02-29 | 48.21M shares derived: average of 4 quarters · filed 2024-02-29 | |
| 2022-03-31 | 48.14M shares 10-Q · filed 2023-05-09 | 47.99M shares derived: average of 2 quarters · filed 2024-02-29 | 48.00M shares derived: average of 3 quarters · filed 2024-02-29 | 47.93M shares derived: average of 4 quarters · filed 2024-02-29 | |
| 2021-12-31 | 47.83M shares derived: 10-K 12 month − 10-Q 9 month · filed 2024-02-29 | 47.93M shares derived: average of 2 quarters · filed 2024-02-29 | 47.86M shares derived: average of 3 quarters · filed 2024-02-29 | 47.78M shares 10-K · filed 2024-02-29 | |
| 2021-09-30 | 48.02M shares 10-Q · filed 2022-11-08 | 47.88M shares derived: average of 2 quarters · filed 2022-11-08 | 47.76M shares 10-Q · filed 2022-11-08 | 47.69M shares derived: average of 4 quarters · filed 2023-03-01 | |
| 2021-06-30 | 47.73M shares 10-Q · filed 2022-08-09 | 47.63M shares 10-Q · filed 2022-08-09 | 47.58M shares derived: average of 3 quarters · filed 2023-03-01 | 47.56M shares derived: average of 4 quarters · filed 2023-03-01 | |
| 2021-03-31 | 47.52M shares 10-Q · filed 2022-05-10 | 47.51M shares derived: average of 2 quarters · filed 2023-03-01 | 47.50M shares derived: average of 3 quarters · filed 2023-03-01 | 47.32M shares derived: average of 4 quarters · filed 2023-03-01 | |
| 2020-12-31 | 47.49M shares derived: 10-K 12 month − 10-Q 9 month · filed 2023-03-01 | 47.49M shares derived: average of 2 quarters · filed 2023-03-01 | 47.25M shares derived: average of 3 quarters · filed 2023-03-01 | 47.04M shares 10-K · filed 2023-03-01 | |
| 2020-09-30 | 47.50M shares 10-Q · filed 2021-11-09 | 47.12M shares derived: average of 2 quarters · filed 2021-11-09 | 46.89M shares 10-Q · filed 2021-11-09 | 46.87M shares derived: average of 4 quarters · filed 2021-11-09 | |
| 2020-06-30 | 46.75M shares 10-Q · filed 2021-08-09 | 46.58M shares 10-Q · filed 2021-08-09 | 46.67M shares derived: average of 3 quarters · filed 2021-08-09 | 46.81M shares derived: average of 4 quarters · filed 2021-08-09 | |
| 2020-03-31 | 46.41M shares 10-Q · filed 2021-05-07 | 46.62M shares derived: average of 2 quarters · filed 2021-05-07 | 46.83M shares derived: average of 3 quarters · filed 2021-05-07 | 46.90M shares derived: average of 4 quarters · filed 2021-05-07 | |
| 2019-12-31 | 46.84M shares 10-K · filed 2020-03-16 | 47.04M shares derived: average of 2 quarters · filed 2020-11-06 | 47.06M shares derived: average of 3 quarters · filed 2020-11-06 | 46.98M shares 10-K · filed 2022-03-11 | |
| 2019-09-30 | 47.24M shares 10-Q · filed 2020-11-06 | 47.17M shares derived: average of 2 quarters · filed 2020-11-06 | 47.03M shares 10-Q · filed 2020-11-06 | 46.84M shares derived: average of 4 quarters · filed 2020-11-06 | |
| 2019-06-30 | 47.11M shares 10-Q · filed 2020-08-07 | 46.92M shares 10-Q · filed 2020-08-07 | 46.71M shares derived: average of 3 quarters · filed 2020-08-07 | 46.59M shares derived: average of 4 quarters · filed 2020-08-07 | |
| 2019-03-31 | 46.74M shares 10-Q · filed 2020-05-11 | 46.51M shares derived: average of 2 quarters · filed 2020-05-11 | 46.42M shares derived: average of 3 quarters · filed 2020-05-11 | 46.45M shares derived: average of 4 quarters · filed 2020-05-11 | |
| 2018-12-31 | 46.27M shares 10-K · filed 2020-03-16 | 46.25M shares derived: average of 2 quarters · filed 2020-03-16 | 46.36M shares derived: average of 3 quarters · filed 2020-03-16 | 46.40M shares 10-K · filed 2021-03-15 | |
| 2018-09-30 | 46.24M shares 10-K · filed 2020-03-16 | 46.40M shares derived: average of 2 quarters · filed 2020-03-16 | 46.44M shares 10-Q · filed 2019-11-08 | 46.39M shares derived: average of 4 quarters · filed 2020-03-16 | |
| 2018-06-30 | 46.56M shares 10-K · filed 2020-03-16 | 46.53M shares 10-Q · filed 2019-08-09 | 46.43M shares derived: average of 3 quarters · filed 2020-03-16 | 46.35M shares derived: average of 4 quarters · filed 2020-03-16 | |
| 2018-03-31 | 46.51M shares 10-K · filed 2020-03-16 | 46.37M shares derived: average of 2 quarters · filed 2020-03-16 | 46.28M shares derived: average of 3 quarters · filed 2020-03-16 | 46.22M shares derived: average of 4 quarters · filed 2020-03-16 | |
| 2017-12-31 | 46.23M shares 10-K · filed 2019-03-15 | 46.17M shares derived: average of 2 quarters · filed 2019-03-15 | 46.12M shares derived: average of 3 quarters · filed 2019-03-15 | 46.11M shares 10-K · filed 2020-03-16 | |
| 2017-09-30 | 46.10M shares 10-K · filed 2019-03-15 | 46.06M shares derived: average of 2 quarters · filed 2019-03-15 | 46.06M shares 10-Q · filed 2018-11-09 | 46.07M shares derived: average of 4 quarters · filed 2019-03-15 | |
| 2017-06-30 | 46.02M shares 10-K · filed 2019-03-15 | 46.05M shares 10-Q · filed 2018-08-09 | 46.07M shares derived: average of 3 quarters · filed 2019-03-15 | 45.90M shares derived: average of 4 quarters · filed 2019-03-15 | |
| 2017-03-31 | 46.07M shares 10-K · filed 2019-03-15 | 46.09M shares derived: average of 2 quarters · filed 2019-03-15 | 45.86M shares derived: average of 3 quarters · filed 2019-03-15 | 45.63M shares derived: average of 4 quarters · filed 2019-03-15 | |
| 2016-12-31 | 46.10M shares 10-K · filed 2018-03-14 | 45.75M shares derived: average of 2 quarters · filed 2018-03-14 | 45.49M shares derived: average of 3 quarters · filed 2018-03-14 | 45.38M shares 10-K · filed 2019-03-15 | |
| 2016-09-30 | 45.40M shares 10-K · filed 2018-03-14 | 45.18M shares derived: average of 2 quarters · filed 2018-03-14 | 45.13M shares 10-Q · filed 2017-11-09 | 45.12M shares derived: average of 4 quarters · filed 2018-03-14 | |
| 2016-06-30 | 44.96M shares 10-K · filed 2018-03-14 | 45.00M shares 10-Q · filed 2017-08-09 | 45.03M shares derived: average of 3 quarters · filed 2018-03-14 | 45.10M shares derived: average of 4 quarters · filed 2018-03-14 | |
| 2016-03-31 | 45.04M shares 10-K · filed 2018-03-14 | 45.06M shares derived: average of 2 quarters · filed 2018-03-14 | 45.15M shares derived: average of 3 quarters · filed 2018-03-14 | 45.07M shares derived: average of 4 quarters · filed 2018-03-14 | |
| 2015-12-31 | 45.09M shares 10-K · filed 2017-03-15 | 45.09K shares 10-K · filed 2016-03-15 | 45.20M shares derived: average of 2 quarters · filed 2017-03-15 | 45.08M shares derived: average of 3 quarters · filed 2017-03-15 | 44.96M shares 10-K · filed 2018-03-14 |
| 2015-09-30 | 45.31M shares 10-K · filed 2017-03-15 | 45.08M shares derived: average of 2 quarters · filed 2017-03-15 | 44.92M shares 10-Q · filed 2016-11-09 | 33.70M shares derived: average of 4 quarters · filed 2017-03-15 | |
| 2015-06-30 | 44.85M shares 10-K · filed 2017-03-15 | 44.73M shares 10-Q · filed 2016-08-09 | 29.83M shares derived: average of 3 quarters · filed 2017-03-15 | 22.38M shares derived: average of 4 quarters · filed 2017-03-15 | |
| 2015-03-31 | 44.60M shares 10-K · filed 2017-03-15 | 22.32M shares derived: average of 2 quarters · filed 2017-03-15 | 14.90M shares derived: average of 3 quarters · filed 2017-03-15 | 11.18M shares derived: average of 4 quarters · filed 2017-03-15 | |
| 2014-12-31 | 44.65K shares 10-K · filed 2016-03-15 | 44.65M shares 10-K · filed 2015-03-26 | 44.65K shares derived: average of 2 quarters · filed 2016-03-15 | 43.02K shares derived: average of 3 quarters · filed 2016-03-15 | 41.96M shares 10-K · filed 2017-03-15 |
| 2014-09-30 | 44.64K shares 10-K · filed 2016-03-15 | 44.64M shares 10-Q · filed 2014-11-13 | 42.21K shares derived: average of 2 quarters · filed 2016-03-15 | 41.06M shares 10-Q · filed 2015-11-13 | 9.71M shares derived: average of 4 quarters · filed 2016-03-15 |
| 2014-06-30 | 39.77K shares 10-K · filed 2016-03-15 | 39.77M shares 10-Q · filed 2014-08-13 | 39.27M shares 10-Q · filed 2015-08-13 | 12.93M shares derived: average of 3 quarters · filed 2016-03-15 | 19.38M shares derived: average of 4 quarters · filed 2016-03-15 |
| 2014-03-31 | 38.77K shares 10-K · filed 2016-03-15 | 38.77M shares 10-K · filed 2015-03-26 | 19.38M shares derived: average of 2 quarters · filed 2016-03-15 | 25.82M shares derived: average of 3 quarters · filed 2016-03-15 | 29.04M shares derived: average of 4 quarters · filed 2016-03-15 |
| 2013-12-31 | 38.72M shares 10-K · filed 2015-03-26 | 38.72M shares derived: average of 2 quarters · filed 2015-03-26 | 38.71M shares derived: average of 3 quarters · filed 2015-03-26 | 38.71M shares 10-K · filed 2016-03-15 | |
| 2013-09-30 | 38.71M shares 10-K · filed 2015-03-26 | 38.71M shares derived: average of 2 quarters · filed 2015-03-26 | 38.71M shares 10-Q · filed 2014-11-13 | ||
| 2013-06-30 | 38.71M shares 10-K · filed 2015-03-26 | 38.71M shares 10-Q · filed 2014-08-13 | |||
| 2013-03-31 | 38.71M shares 10-K · filed 2015-03-26 | ||||
| 2012-12-31 | 38.58M shares 10-K · filed 2015-03-26 |
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