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| Ticker | Owner | Relationship | Date | Transaction | Cost | #Shares | Value ($) | #Shares Total | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | May 27 '26 | Sale | 17.19 | 3,208 | 55,157 | 801,310 | May 28 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | May 21 '26 | Sale | 14.79 | 28,812 | 426,083 | 804,518 | May 26 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Feb 23 '26 | Sale | 10.16 | 25,366 | 257,604 | 723,330 | Feb 24 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Jan 28 '26 | Sale | 12.00 | 39,690 | 476,351 | 748,696 | Jan 30 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Jan 28 '26 | Option Exercise | 0.05 | 39,690 | 2,036 | 788,386 | Jan 30 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Jan 23 '26 | Option Exercise | 0.05 | 1,600 | 80 | 750,296 | Jan 23 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Jan 23 '26 | Sale | 12.00 | 1,600 | 19,200 | 748,696 | Jan 23 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Jan 22 '26 | Option Exercise | 0.11 | 492,827 | 53,759 | 1,241,523 | Jan 23 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Jan 22 '26 | Sale | 12.04 | 492,827 | 5,931,912 | 748,696 | Jan 23 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Jan 21 '26 | Option Exercise | 0.37 | 73,280 | 27,355 | 821,976 | Jan 23 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Jan 21 '26 | Sale | 12.00 | 73,280 | 879,411 | 748,696 | Jan 23 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Dec 11 '25 | Option Exercise | 0.05 | 125,000 | 6,250 | 946,951 | Dec 15 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Dec 11 '25 | Sale | 10.51 | 198,255 | 2,083,382 | 748,696 | Dec 15 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Nov 21 '25 | Sale | 10.08 | 25,024 | 252,274 | 821,951 | Nov 25 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Aug 21 '25 | Sale | 6.82 | 19,159 | 130,592 | 846,975 | Aug 25 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | May 21 '25 | Sale | 2.43 | 20,366 | 49,530 | 866,134 | May 23 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Mar 14 '25 | Option Exercise | 0.98 | 3,471 | 3,402 | 424,960 | Mar 18 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Feb 21 '25 | Sale | 3.13 | 9,066 | 28,406 | 421,489 | Feb 24 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Nov 21 '24 | Sale | 1.96 | 8,575 | 16,846 | 430,555 | Nov 22 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Aug 21 '24 | Sale | 1.04 | 8,800 | 9,152 | 386,168 | Aug 22 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | May 22 '24 | Sale | 1.36 | 4,121 | 5,588 | 394,968 | May 24 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | May 21 '24 | Sale | 1.33 | 5,272 | 6,999 | 399,089 | May 24 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Sep 15 '23 | Sale | 3.89 | 33,630 | 130,727 | 29,791 | Sep 18 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Sep 14 '23 | Sale | 3.66 | 46,370 | 169,492 | 63,421 | Sep 18 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Sep 09 '23 | Option Exercise | 0.05 | 80,000 | 4,000 | 109,791 | Sep 12 |
| AMPX | Stefan Constantin Ionel | Chief Technology Officer | Dec 14 '22 | Option Exercise | 0.05 | 30,000 | 1,500 | 30,000 | Dec 15 |