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| Ticker | Owner | Relationship | Date | Transaction | Cost | #Shares | Value ($) | #Shares Total | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| AMPH | Zhang Jack Y. | CEO & CHIEF SCIENTIFIC OFFICER | Jun 13 '25 | Option Exercise | 13.03 | 200,000 | 2,606,000 | 2,847,659 | Jun 16 |
| AMPH | Zhang Jack Y. | CEO & CHIEF SCIENTIFIC OFFICER | Mar 14 '25 | Option Exercise | 14.69 | 501,690 | 7,369,826 | 2,899,859 | Mar 18 |
| AMPH | Zhang Jack Y. | CEO & CHIEF SCIENTIFIC OFFICER | Sep 13 '24 | Option Exercise | 14.69 | 100,000 | 1,469,000 | 2,633,554 | Sep 16 |
| AMPH | Zhang Jack Y. | CEO & CHIEF SCIENTIFIC OFFICER | Jun 10 '24 | Option Exercise | 14.69 | 100,000 | 1,469,000 | 2,533,554 | Jun 11 |
| AMPH | Zhang Jack Y. | CEO & Chief Scientific Officer | Mar 15 '24 | Option Exercise | 12.46 | 1,032,976 | 12,870,881 | 2,858,043 | Mar 19 |
| AMPH | Zhang Jack Y. | CEO & Chief Scientific Officer | May 20 '22 | Sale | 34.21 | 10,650 | 364,365 | 2,104,143 | May 23 |
| AMPH | Zhang Jack Y. | CEO & Chief Scientific Officer | May 19 '22 | Sale | 33.76 | 41,730 | 1,408,760 | 2,114,793 | May 20 |
| AMPH | Zhang Jack Y. | CEO & Chief Scientific Officer | May 18 '22 | Sale | 34.14 | 67,046 | 2,289,100 | 2,156,523 | May 20 |
| AMPH | Zhang Jack Y. | CEO & Chief Scientific Officer | May 17 '22 | Sale | 35.76 | 50,376 | 1,801,440 | 2,223,569 | May 18 |
| AMPH | Zhang Jack Y. | CEO & Chief Scientific Officer | May 16 '22 | Sale | 35.75 | 68,069 | 2,433,457 | 2,273,945 | May 18 |