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| Ticker | Owner | Relationship | Date | Transaction | Cost | #Shares | Value ($) | #Shares Total | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| AMPX | Sun Kang | Director | May 27 '26 | Sale | 17.19 | 356 | 6,121 | 1,280,498 | May 28 12:00 AM |
| AMPX | Sun Kang | Director | May 21 '26 | Sale | 14.79 | 67,796 | 1,002,594 | 1,280,854 | May 26 12:00 AM |
| AMPX | Sun Kang | Director | Apr 01 '26 | Option Exercise | 2.02 | 3,000,000 | 6,052,482 | 2,842,400 | Apr 02 12:00 AM |
| AMPX | Sun Kang | Director | Apr 01 '26 | Sale | 15.91 | 1,500,000 | 23,860,714 | 1,342,400 | Apr 02 12:00 AM |
| AMPX | Sun Kang | Director | Mar 23 '26 | Sale | 18.80 | 217,869 | 4,095,401 | 56,406 | Mar 24 12:00 AM |
| AMPX | Sun Kang | Director | Feb 23 '26 | Sale | 10.16 | 61,251 | 622,035 | 1,342,400 | Feb 24 12:00 AM |
| AMPX | Sun Kang | Director | Jan 20 '26 | Option Exercise | 1.78 | 86,370 | 153,738 | 1,446,836 | Jan 20 12:00 AM |
| AMPX | Sun Kang | Director | Jan 20 '26 | Sale | 11.03 | 43,185 | 476,274 | 1,403,651 | Jan 20 12:00 AM |
| AMPX | Sun Kang | Director | Jan 16 '26 | Sale | 11.07 | 950,548 | 10,518,669 | 1,403,651 | Jan 20 12:00 AM |
| AMPX | Sun Kang | Director | Jan 16 '26 | Option Exercise | 2.42 | 1,901,096 | 4,608,438 | 2,354,199 | Jan 20 12:00 AM |
| AMPX | Sun Kang | Director | Jan 12 '26 | Option Exercise | 1.80 | 1,012,534 | 1,826,528 | 1,909,918 | Jan 14 12:00 AM |
| AMPX | Sun Kang | Director | Jan 12 '26 | Sale | 10.10 | 506,267 | 5,111,474 | 1,403,651 | Jan 14 12:00 AM |
| AMPX | Sun Kang | Chief Executive Officer | Nov 21 '25 | Sale | 10.08 | 68,655 | 692,132 | 1,403,651 | Nov 25 12:00 AM |
| AMPX | Sun Kang | Chief Executive Officer | Nov 17 '25 | Option Exercise | 0.28 | 2,000,000 | 556,250 | 2,472,306 | Nov 19 12:00 AM |
| AMPX | Sun Kang | Chief Executive Officer | Nov 17 '25 | Sale | 10.60 | 1,000,000 | 10,595,300 | 1,472,306 | Nov 19 12:00 AM |
| AMPX | Sun Kang | Chief Executive Officer | Aug 21 '25 | Sale | 6.82 | 65,654 | 447,511 | 1,472,306 | Aug 25 12:00 AM |
| AMPX | Sun Kang | Chief Executive Officer | May 21 '25 | Sale | 2.43 | 69,786 | 169,720 | 1,812,235 | May 23 12:00 AM |
| AMPX | Sun Kang | Chief Executive Officer | Feb 21 '25 | Sale | 3.13 | 34,353 | 107,635 | 1,282,621 | Feb 24 12:00 AM |
| AMPX | Sun Kang | Chief Executive Officer | Nov 21 '24 | Sale | 1.96 | 33,779 | 66,362 | 1,316,974 | Nov 22 12:00 AM |
| AMPX | Sun Kang | Chief Executive Officer | Aug 21 '24 | Sale | 1.04 | 33,333 | 34,666 | 1,350,753 | Aug 22 12:00 AM |
| AMPX | Sun Kang | See Remarks | May 22 '24 | Sale | 1.36 | 15,611 | 21,169 | 1,384,086 | May 24 12:00 AM |
| AMPX | Sun Kang | See Remarks | May 21 '24 | Sale | 1.33 | 19,973 | 26,516 | 1,399,697 | May 24 12:00 AM |