PRINS RICHARD K - Insider Non-Derivative Transactions at Amphastar Pharmaceuticals, Inc. (AMPH) - (SEC)
Updated on January 3, 2026.
According to recent SEC insider information filed on Nov 25, 2025, PRINS RICHARD K's relationship to Amphastar Pharmaceuticals, Inc. (AMPH) is Director, and currently has 39,362 shares of Common Stock.
The chart below shows the number of shares owned, and the table shows the recent insider transactions.
You can see similar information for other AMPH insiders.
Related Topics: SEC Topic List.
Data Source: SEC.
PRINS RICHARD K - Insider Non-Derivative Transactions of AMPH Common Stock
PRINS RICHARD K - Insider Non-Derivative Transactions at AMPH
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| Date | Transaction | No. of Shares | Price Per Share | Shares Owned After Transactions |
|---|---|---|---|---|
| Nov 26, 2025 | Sell -- (Common Stock) | 4179 | 27.1 | 35183 |
| Nov 26, 2025 | M -- (Common Stock) | 4179 | 16.69 | 39362 |
| Jun 3, 2025 | Acquisition -- (Common Stock) | 5122 | 0 | 35183 |
| Dec 10, 2024 | G -- (Common Stock) | 410 | 0 | 30061 |
| Dec 10, 2024 | Sell -- (Common Stock) | 10000 | 43.77 | 30471 |
| Dec 10, 2024 | M -- (Common Stock) | 10000 | 19.52 | 40471 |
| Nov 13, 2024 | G -- (Common Stock) | 1000 | 0 | 30471 |
| Nov 13, 2024 | Sell -- (Common Stock) | 5000 | 48.8 | 31471 |
| Nov 13, 2024 | M -- (Common Stock) | 2500 | 16.69 | 36471 |
| Aug 13, 2024 | Sell -- (Common Stock) | 17101 | 43.07 | 33971 |
| Aug 13, 2024 | M -- (Common Stock) | 3915 | 20.03 | 37886 |
| Aug 13, 2024 | M -- (Common Stock) | 6004 | 20.08 | 43890 |
| Aug 13, 2024 | M -- (Common Stock) | 7182 | 19.52 | 51072 |
| Jun 4, 2024 | Acquisition -- (Common Stock) | 3076 | 0 | 33971 |
| Nov 18, 2023 | G -- (Common Stock) | 1000 | 0 | 30895 |
| Nov 18, 2023 | Sell -- (Common Stock) | 4000 | 55.86 | 31895 |
| Nov 14, 2023 | Sell -- (Common Stock) | 5000 | 52.5 | 35895 |
| Aug 19, 2023 | Sell -- (Common Stock) | 2000 | 52.5 | 40895 |
| Aug 16, 2023 | Sell -- (Common Stock) | 4163 | 57.39 | 42895 |
| Jun 6, 2023 | Acquisition -- (Common Stock) | 2716 | 0 | 47058 |
| May 16, 2023 | Sell -- (Common Stock) | 5000 | 43.5 | 44342 |
| May 16, 2023 | M -- (Common Stock) | 5000 | 16.69 | 49342 |
| May 13, 2023 | G -- (Common Stock) | 3000 | 0 | 44342 |
| May 13, 2023 | Sell -- (Common Stock) | 5000 | 42.06 | 47342 |
| May 13, 2023 | M -- (Common Stock) | 5000 | 16.69 | 52342 |
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