Amprius Technologies, Inc.
AMPX
31 insider filings · Latest: Aug 21, 2026
Common Stock Transactions
| Txn Date | Accepted | Insider | Type | Shares | Avg Price | Value | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|---|
| Aug 21, 2026 | Aug 25 9:22 PM | Sun KangDirector | Sale | 62,101 | $10.34 | $642.2K | 1,218,397(D) | View → |
| Aug 21, 2026 | Aug 25 9:22 PM | KANG SUN | Proposed Sale | 62,101 | $10.34 | $642.2K | — | View → |
| Aug 21, 2026 | Aug 25 9:22 PM | Constantin Ionel StefanChief Technology Officer | Sale | 29,681 | $10.34 | $306.9K | 771,629(D) | View → |
| Aug 21, 2026 | Aug 25 9:21 PM | Constantin Ionel Stefan | Proposed Sale | 29,681 | $10.34 | $306.9K | — | View → |
| Aug 24, 2026 | Aug 25 9:21 PM | Thomas M StepienDirector, Chief Executive Officer | Sale | 8,000 | $10.03 | $80.2K | 594,096(D) | View → |
| Aug 21, 2026 | Aug 25 9:21 PM | Thomas M StepienDirector, Chief Executive Officer | Sale | 23,529 | $10.34 | $243.3K | 602,096(D) | View → |
| Aug 21, 2026 | Aug 25 9:21 PM | THOMAS M STEPIEN | Proposed Sale | 23,529 | $10.34 | $243.3K | — | View → |
| Aug 24, 2026 | Aug 24 8:08 PM | THOMAS M STEPIEN | Proposed Sale | 8,000 | $10.03 | $80.2K | — | View → |
| Jun 15, 2026 | Jun 16 10:00 PM | DIXON DONALD RDirector | Sale | 85,000 | $17.17 | $1.5M | 359,380(I) | View → |
| Jun 9, 2026 | Jun 11 9:56 PM | DIXON DONALD RDirector | Sale | 40,000 | $19.13 | $765.2K | 444,380(I) | View → |
| Jun 8, 2026 | Jun 8 7:28 PM | DIXON DONALD R | Proposed Sale | 125,000 | $18.85 | $2.4M | — | View → |
| Jun 4, 2026 | Jun 5 8:57 PM | Thomas M StepienDirector, Chief Executive Officer | Sale | 2,000 | $20.97 | $41.9K | 625,625(D) | View → |
| Jun 4, 2026 | Jun 4 8:18 PM | THOMAS M STEPIEN | Proposed Sale | 2,000 | $20.97 | $41.9K | — | View → |
| May 27, 2026 | May 28 10:24 PM | Sun KangDirector | Sale | 356 | $17.19 | $6.1K | 1,280,498(D) | View → |
| May 27, 2026 | May 28 10:23 PM | KANG SUN | Proposed Sale | 356 | $17.19 | $6.1K | — | View → |
| May 27, 2026 | May 28 10:22 PM | Thomas M StepienDirector, Chief Executive Officer | Sale | 4,375 | $17.19 | $75.2K | 694,923(D) | View → |
| May 27, 2026 | May 28 10:20 PM | Thomas M. Stepien | Proposed Sale | 4,375 | $17.19 | $75.2K | — | View → |
| May 27, 2026 | May 28 10:12 PM | Constantin Ionel StefanChief Technology Officer | Sale | 3,208 | $17.19 | $55.2K | 801,310(D) | View → |
| May 27, 2026 | May 28 10:11 PM | Constantin Ionel Stefan | Proposed Sale | 3,208 | $17.19 | $55.2K | — | View → |
| May 26, 2026 | May 28 10:10 PM | DIXON DONALD RDirector | Sale | 17,895 | $17.90 | $320.3K | 484,380(I) | View → |
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Stock Options & Derivatives
| Txn Date | Accepted | Insider | Type | Shares | Exercise Price | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|
| Apr 1, 2026 | Apr 2 8:51 PM | Sun KangDirector | Option Exercise | 1,500,000 | $3.68 | 1,787,007(D) | View → |
| Mar 12, 2026 | Mar 13 10:08 PM | Wen Hsuan HsiehDirector | Option Exercise | 270,251 | $2.61 | 0(D) | View → |
| Mar 12, 2026 | Mar 12 11:25 PM | Steven ChuDirector | Option Exercise | 155,565 | $2.61 | 0(D) | View → |
| Mar 10, 2026 | Mar 12 11:25 PM | Steven ChuDirector | Option Exercise | 104,132 | $0.62 | 69,422(D) | View → |
| Jan 28, 2026 | Jan 30 11:02 PM | Constantin Ionel StefanChief Technology Officer | Option Exercise | 39,690 | $0.62 | 0(D) | View → |
| Jan 23, 2026 | Jan 23 10:36 PM | Constantin Ionel StefanChief Technology Officer | Option Exercise | 1,600 | $0.05 | 39,600(D) | View → |
| Jan 22, 2026 | Jan 23 10:36 PM | Constantin Ionel StefanChief Technology Officer | Option Exercise | 492,827 | $0.45 | 0(D) | View → |
| Jan 21, 2026 | Jan 23 10:36 PM | Constantin Ionel StefanChief Technology Officer | Option Exercise | 73,280 | $0.62 | 166,104(D) | View → |
| Jan 20, 2026 | Jan 20 10:33 PM | Sun KangDirector | Option Exercise | 43,185 | $1.78 | 1,312,505(D) | View → |
| Jan 16, 2026 | Jan 20 10:33 PM | Sun KangDirector | Option Exercise | 950,548 | $2.50 | 1,355,690(D) | View → |