Jack Y. Zhang serves as Executive at Amphastar Pharmaceuticals, Inc., where they oversee executive responsibilities. Since joining the company, Jack Y. Zhang has executed 128 insider transactions totaling $29.7M, demonstrating a bearish approach to their equity position. Their most recent transaction on Sep 13, 2024 involved exercising options for 100,000 shares valued at $1.5M.
Jack Y. Zhang currently holds 2,633,554 shares of Amphastar Pharmaceuticals, Inc. (AMPH), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Jack Y. Zhang has been a net seller of AMPH stock. They have purchased $642.9K and sold $29.1M worth of shares.
Jack Y. Zhang's most recent insider trade was on Sep 13, 2024, when they sold 100,000 shares at $14.69 per share.
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| 100,000 |
| $14.69 |
| Discretionary |
| Mar 4, 2024 | AMPH | $0 | Award | 64,310 | $N/A | Discretionary |
| Mar 4, 2024 | AMPH | $0 | Award | 27,110 | $N/A | Discretionary |
| Jan 10, 2024 | AMPH | $2.8M | Sale | 50,514 | $54.89 | Planned |
| Jan 10, 2024 | AMPH | $51.5K | Sale | 920 | $55.95 | Planned |
| Jan 10, 2024 | AMPH | $97.8K | Sale | 1,716 | $57.00 | Planned |
| Jan 10, 2024 | AMPH | $4.2M | Sale | 78,236 | $54.32 | Planned |
| Mar 6, 2023 | AMPH | $0 | Award | 34,301 | $N/A | Discretionary |
| Mar 6, 2023 | AMPH | $0 | Award | 81,383 | $N/A | Discretionary |
| May 20, 2022 | AMPH | $364.3K | Sale | 10,650 | $34.21 | Discretionary |
| Mar 17, 2022 | AMPH | $539.0K | Payment | 15,768 | $34.18 | Discretionary |
| Mar 17, 2022 | AMPH | $241.0K | Payment | 7,052 | $34.18 | Discretionary |
| Mar 16, 2022 | AMPH | $863.7K | Payment | 25,241 | $34.22 | Discretionary |
| Mar 16, 2022 | AMPH | $356.8K | Payment | 10,426 | $34.22 | Discretionary |
| Mar 15, 2021 | AMPH | $183.7K | Payment | 9,592 | $19.15 | Discretionary |
| Mar 15, 2021 | AMPH | $537.9K | Payment | 28,088 | $19.15 | Discretionary |
| Feb 18, 2021 | AMPH | $7.6K | Sale | 407 | $18.58 | Discretionary |
| Feb 17, 2021 | AMPH | $257.7K | Sale | 13,801 | $18.67 | Discretionary |
| Feb 16, 2021 | AMPH | $301.0K | Sale | 16,259 | $18.51 | Discretionary |
| Feb 12, 2021 | AMPH | $251.5K | Sale | 13,277 | $18.94 | Discretionary |
| Feb 11, 2021 | AMPH | $377.8K | Sale | 19,823 | $19.06 | Discretionary |
| Feb 10, 2021 | AMPH | $295.4K | Sale | 15,747 | $18.76 | Discretionary |
| Feb 9, 2021 | AMPH | $225.8K | Sale | 11,927 | $18.93 | Discretionary |
| Feb 8, 2021 | AMPH | $254.1K | Sale | 13,452 | $18.89 | Discretionary |
| Feb 5, 2021 | AMPH | $293.7K | Sale | 15,507 | $18.94 | Discretionary |
| Feb 4, 2021 | AMPH | $483.0K | Sale | 25,570 | $18.89 | Discretionary |
| Feb 3, 2021 | AMPH | $299.2K | Sale | 16,299 | $18.36 | Discretionary |
| Feb 2, 2021 | AMPH | $257.8K | Sale | 13,817 | $18.66 | Discretionary |
| Feb 1, 2021 | AMPH | $441.0K | Sale | 24,114 | $18.29 | Discretionary |