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| Ticker | Owner | Relationship | Date | Transaction | Cost | #Shares | Value ($) | #Shares Total | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | Dec 17 '25 | Option Exercise | 11.33 | 9,787 | 110,887 | 147,830 | Dec 18 |
| AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | Dec 17 '25 | Sale | 26.20 | 9,787 | 256,379 | 138,043 | Dec 18 |
| AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | Dec 13 '24 | Option Exercise | 11.33 | 8,000 | 90,640 | 126,469 | Dec 16 |
| AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | Dec 13 '24 | Sale | 45.23 | 8,000 | 361,840 | 118,469 | Dec 16 |
| AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | Dec 12 '24 | Option Exercise | 11.33 | 7,000 | 79,310 | 125,469 | Dec 16 |
| AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | Dec 12 '24 | Sale | 44.42 | 7,000 | 310,975 | 118,469 | Dec 16 |
| AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | Nov 12 '24 | Option Exercise | 14.95 | 6,893 | 103,050 | 125,281 | Nov 13 |
| AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | Nov 12 '24 | Sale | 48.88 | 6,893 | 336,930 | 118,388 | Nov 13 |
| AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | Sep 13 '24 | Option Exercise | 14.95 | 3,000 | 44,850 | 121,388 | Sep 17 |
| AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | Sep 13 '24 | Sale | 48.26 | 3,000 | 144,785 | 118,388 | Sep 17 |
| AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | Aug 26 '24 | Option Exercise | 14.95 | 4,000 | 59,800 | 122,388 | Aug 27 |
| AMPH | Zhou Rong | SENIOR EVP, PRODUCTION CENTER | Aug 26 '24 | Sale | 48.35 | 4,000 | 193,400 | 118,388 | Aug 27 |
| AMPH | Zhou Rong | Senior EVP, Production Center | Dec 04 '23 | Sale | 59.58 | 3,514 | 209,364 | 112,420 | Dec 05 |
| AMPH | Zhou Rong | Senior EVP, Production Center | Dec 04 '23 | Option Exercise | 16.19 | 3,514 | 56,892 | 115,934 | Dec 05 |
| AMPH | Zhou Rong | Senior EVP, Production Center | Dec 01 '23 | Option Exercise | 14.40 | 4,316 | 62,150 | 116,736 | Dec 05 |
| AMPH | Zhou Rong | Senior EVP, Production Center | Dec 01 '23 | Sale | 58.58 | 4,316 | 252,831 | 112,420 | Dec 05 |
| AMPH | Zhou Rong | EVP, Production Center | Jun 20 '23 | Option Exercise | 11.33 | 9,651 | 109,346 | 112,341 | Jun 21 |
| AMPH | Zhou Rong | EVP, Production Center | Jun 15 '23 | Option Exercise | 14.64 | 19,377 | 283,671 | 102,690 | Jun 20 |
| AMPH | Zhou Rong | EVP, Production Center | Jun 15 '23 | Sale | 51.79 | 5,000 | 258,947 | 96,888 | Jun 20 |
| AMPH | Zhou Rong | EVP, Production Center | Jun 13 '23 | Sale | 48.24 | 5,000 | 241,200 | 88,313 | Jun 14 |
| AMPH | Zhou Rong | EVP, Production Center | Jun 13 '23 | Option Exercise | 14.40 | 5,000 | 72,000 | 93,313 | Jun 14 |
| AMPH | Zhou Rong | EVP, Production Center | May 18 '23 | Option Exercise | 14.40 | 10,000 | 144,000 | 97,598 | May 19 |
| AMPH | Zhou Rong | EVP, Production Center | May 18 '23 | Sale | 44.20 | 10,000 | 442,050 | 87,598 | May 19 |