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 Jul 2, 2018 involved selling 165,968 shares valued at $2.6M.
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 Jul 2, 2018, when they sold 165,968 shares at $15.39 per share.
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| $16.06 |
| Discretionary |
| May 15, 2018 | AMPH | $402.0K | Purchase | 25,000 | $16.08 | Discretionary |
| Mar 26, 2018 | AMPH | $385.7K | Payment | 20,728 | $18.61 | Discretionary |
| Mar 26, 2018 | AMPH | $164.6K | Payment | 8,844 | $18.61 | Discretionary |
| Mar 17, 2018 | AMPH | $190.9K | Payment | 9,589 | $19.91 | Discretionary |
| Mar 17, 2018 | AMPH | $607.0K | Payment | 30,487 | $19.91 | Discretionary |
| Mar 16, 2018 | AMPH | $154.7K | Payment | 7,771 | $19.91 | Discretionary |
| Mar 16, 2018 | AMPH | $385.5K | Payment | 19,360 | $19.91 | Discretionary |
| May 23, 2017 | AMPH | $3.0M | Option Exercise | 264,895 | $11.51 | Discretionary |
| May 23, 2017 | AMPH | $4.4M | Option Exercise | 382,448 | $11.51 | Discretionary |
| Mar 27, 2017 | AMPH | $132.3K | Payment | 9,271 | $14.27 | Discretionary |
| Mar 27, 2017 | AMPH | $392.1K | Payment | 27,480 | $14.27 | Discretionary |
| Mar 26, 2017 | AMPH | $92.2K | Payment | 6,704 | $13.76 | Discretionary |
| Mar 26, 2017 | AMPH | $300.0K | Payment | 21,799 | $13.76 | Discretionary |
| Mar 17, 2017 | AMPH | $317.7K | Payment | 23,108 | $13.75 | Discretionary |
| Mar 17, 2017 | AMPH | $136.8K | Payment | 9,951 | $13.75 | Discretionary |
| Mar 16, 2017 | AMPH | $0 | Award | 156,554 | $N/A | Discretionary |
| Mar 16, 2017 | AMPH | $0 | Award | 67,415 | $N/A | Discretionary |
| Sep 21, 2016 | AMPH | $10.7K | Sale | 500 | $21.45 | Discretionary |
| Sep 21, 2016 | AMPH | $1.1M | Sale | 54,581 | $20.70 | Discretionary |
| Sep 21, 2016 | AMPH | $922.6K | Option Exercise | 55,081 | $16.75 | Discretionary |
| Sep 20, 2016 | AMPH | $1.6M | Sale | 76,152 | $20.73 | Discretionary |
| Sep 20, 2016 | AMPH | $3.5M | Option Exercise | 207,350 | $16.75 | Discretionary |
| Sep 20, 2016 | AMPH | $2.0M | Sale | 95,213 | $21.33 | Discretionary |
| Sep 20, 2016 | AMPH | $1.8M | Sale | 86,555 | $20.74 | Discretionary |
| Sep 20, 2016 | AMPH | $3.0M | Option Exercise | 181,768 | $16.75 | Discretionary |
| Sep 20, 2016 | AMPH | $2.8M | Sale | 131,198 | $21.33 | Discretionary |
| Mar 27, 2016 | AMPH | $103.3K | Payment | 8,641 | $11.96 | Discretionary |
| Mar 27, 2016 | AMPH | $309.2K | Payment | 25,856 | $11.96 | Discretionary |