Amphastar Pharmaceuticals shares owned by Group One Trading
Quarter-by-quarter ownership of Amphastar Pharmaceuticals (AMPH) shares owned by Group One Trading
from 13F filings
Historical chart of Group One Trading investment in Amphastar Pharmaceuticals
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Quarterly reported holdings in Amphastar Pharmaceuticals by Group One Trading
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2026-03-31 | $4.2k | 214 | 19.59 |
| 2025-12-31 | $47k | 1.7k | 26.78 |
| 2025-09-30 | $55k | 2.1k | 26.65 |
| 2024-06-30 | $33k | 814 | 40.00 |
| 2023-06-30 | $23k | 394 | 57.47 |
| 2023-03-31 | $3.8k | 100 | 37.50 |
| 2022-06-30 | $133k | 3.8k | 34.76 |
| 2022-03-31 | $90k | 2.5k | 36.00 |
| 2021-06-30 | $2.0k | 100 | 20.00 |
| 2017-06-30 | $14k | 801 | 17.48 |
| 2017-03-31 | $23k | 1.6k | 14.37 |
| 2016-12-31 | $24k | 1.3k | 18.45 |