Amphastar Pharmaceuticals shares owned by Tower Research Capital
Quarter-by-quarter ownership of Amphastar Pharmaceuticals (AMPH) shares owned by Tower Research Capital
from 13F filings
Historical chart of Tower Research Capital investment in Amphastar Pharmaceuticals
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Quarterly reported holdings in Amphastar Pharmaceuticals by Tower Research Capital
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2026-03-31 | $77k | 3.9k | 19.59 |
| 2025-12-31 | $48k | 1.8k | 26.78 |
| 2025-09-30 | $22k | 822 | 26.65 |
| 2025-06-30 | $82k | 3.6k | 22.96 |
| 2025-03-31 | $29k | 987 | 28.99 |
| 2024-12-31 | $43k | 1.1k | 37.13 |
| 2024-09-30 | $39k | 797 | 48.53 |
| 2024-06-30 | $338k | 8.5k | 40.00 |
| 2024-03-31 | $52k | 1.2k | 43.91 |
| 2023-09-30 | $54k | 1.2k | 45.99 |
| 2023-06-30 | $66k | 1.1k | 57.47 |
| 2023-03-31 | $74k | 2.0k | 37.25 |
| 2022-12-31 | $16k | 651 | 24.10 |
| 2022-09-30 | $143k | 5.1k | 27.89 |
| 2022-06-30 | $71k | 2.1k | 33.61 |
| 2022-03-31 | $370k | 10k | 35.94 |
| 2021-12-31 | $25k | 1.1k | 23.00 |
| 2021-09-30 | $85k | 4.5k | 19.11 |
| 2021-06-30 | $46k | 2.3k | 20.34 |
| 2021-03-31 | $42k | 2.3k | 18.18 |
| 2020-12-31 | $21k | 1.0k | 20.25 |
| 2020-09-30 | $266k | 14k | 18.78 |
| 2020-06-30 | $88k | 3.9k | 22.40 |
| 2019-03-31 | $10k | 505 | 19.80 |
| 2018-06-30 | $40k | 2.6k | 15.14 |
| 2018-03-31 | $50k | 2.7k | 18.81 |
| 2017-09-30 | $137k | 7.6k | 17.98 |
| 2017-03-31 | $37k | 2.6k | 14.46 |
| 2016-12-31 | $27k | 1.5k | 18.54 |
| 2016-06-30 | $18k | 1.1k | 16.03 |
| 2016-03-31 | $10k | 800 | 12.50 |
| 2015-06-30 | $52k | 3.0k | 17.57 |
| 2014-12-31 | $10k | 872 | 11.47 |
| 2014-09-30 | $55k | 4.8k | 11.55 |