Amphastar Pharmaceuticals shares owned by Oberweis Asset Management
Quarter-by-quarter ownership of Amphastar Pharmaceuticals (AMPH) shares owned by Oberweis Asset Management
from 13F filings
Historical chart of Oberweis Asset Management investment in Amphastar Pharmaceuticals
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Quarterly reported holdings in Amphastar Pharmaceuticals by Oberweis Asset Management
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2023-12-31 | $21M | 340k | 61.85 |
| 2023-09-30 | $7.0M | 153k | 45.99 |
| 2023-06-30 | $8.5M | 148k | 57.47 |
| 2023-03-31 | $6.7M | 178k | 37.50 |
| 2022-12-31 | $3.8M | 134k | 28.02 |
| 2022-09-30 | $2.9M | 102k | 28.10 |
| 2022-06-30 | $623k | 18k | 34.80 |
| 2022-03-31 | $485k | 14k | 35.93 |
| 2021-12-31 | $314k | 14k | 23.26 |
| 2021-09-30 | $202k | 11k | 19.06 |
| 2021-06-30 | $214k | 11k | 20.19 |
| 2016-12-31 | $501k | 27k | 18.42 |
| 2016-09-30 | $516k | 27k | 18.97 |
| 2016-06-30 | $438k | 27k | 16.10 |