Rong Zhou serves as Executive at Amphastar Pharmaceuticals, Inc., where they oversee executive responsibilities. Since joining the company, Rong Zhou has executed 97 insider transactions totaling $5.3M, demonstrating a bearish approach to their equity position. Their most recent transaction on May 14, 2021 involved exercising options for 11,120 shares valued at $158.2K.
Rong Zhou currently holds 138,043 shares of Amphastar Pharmaceuticals, Inc. (AMPH), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Rong Zhou has been a net seller of AMPH stock. They have purchased $0 and sold $5.3M worth of shares.
Rong Zhou's most recent insider trade was on May 14, 2021, when they sold 11,120 shares at $14.23 per share.
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| $19.72 |
| Discretionary |
| May 13, 2021 | AMPH | $10.0K | Option Exercise | 700 | $14.23 | Discretionary |
| May 13, 2021 | AMPH | $13.7K | Sale | 700 | $19.58 | Discretionary |
| Mar 17, 2021 | AMPH | $0 | Award | 21,984 | $N/A | Discretionary |
| Mar 16, 2021 | AMPH | $60.9K | Payment | 3,303 | $18.44 | Discretionary |
| Mar 15, 2021 | AMPH | $31.6K | Payment | 1,652 | $19.15 | Discretionary |
| Jun 4, 2020 | AMPH | $101.8K | Option Exercise | 8,918 | $11.41 | Discretionary |
| Jun 4, 2020 | AMPH | $188.2K | Sale | 9,806 | $19.19 | Discretionary |
| Jun 3, 2020 | AMPH | $247.7K | Sale | 13,163 | $18.82 | Discretionary |
| Jun 3, 2020 | AMPH | $126.4K | Option Exercise | 11,082 | $11.41 | Discretionary |
| Mar 17, 2020 | AMPH | $14.4K | Payment | 992 | $14.50 | Discretionary |
| Mar 16, 2020 | AMPH | $0 | Award | 26,400 | $N/A | Discretionary |
| Mar 16, 2020 | AMPH | $13.3K | Payment | 1,020 | $13.03 | Discretionary |
| Mar 15, 2020 | AMPH | $23.5K | Payment | 1,653 | $14.19 | Discretionary |
| Jun 14, 2019 | AMPH | $4.0K | Payment | 204 | $19.82 | Discretionary |
| May 6, 2019 | AMPH | $194.5K | Option Exercise | 9,600 | $20.26 | Discretionary |
| May 6, 2019 | AMPH | $218.5K | Sale | 9,600 | $22.76 | Discretionary |
| Mar 26, 2019 | AMPH | $16.7K | Payment | 814 | $20.54 | Discretionary |
| Mar 17, 2019 | AMPH | $30.5K | Payment | 1,510 | $20.23 | Discretionary |
| Mar 16, 2019 | AMPH | $31.4K | Payment | 1,553 | $20.23 | Discretionary |
| Mar 15, 2019 | AMPH | $23.9K | Payment | 1,179 | $20.23 | Discretionary |
| Mar 15, 2019 | AMPH | $0 | Award | 10,133 | $N/A | Discretionary |
| Mar 1, 2019 | AMPH | $80.0K | Sale | 3,200 | $25.00 | Discretionary |
| Mar 1, 2019 | AMPH | $64.8K | Option Exercise | 3,200 | $20.26 | Discretionary |
| Feb 5, 2019 | AMPH | $64.8K | Option Exercise | 3,200 | $20.26 | Discretionary |
| Feb 5, 2019 | AMPH | $98.6K | Sale | 4,289 | $23.00 | Discretionary |
| Dec 3, 2018 | AMPH | $24.0K | Sale | 1,089 | $22.00 | Discretionary |
| Nov 9, 2018 | AMPH | $22.9K | Sale | 1,089 | $21.00 | Discretionary |
| Nov 8, 2018 | AMPH | $21.7K | Sale | 1,084 | $20.00 | Discretionary |