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 |
|---|---|---|---|---|---|---|---|---|
| May 21, 2026 | May 26 11:31 PM | Sun KangDirector | Sale | 67,796 | $14.79 | $1.0M | 1,280,854(D) | View → |
| May 21, 2026 | May 26 11:19 PM | KANG SUN | Proposed Sale | 67,796 | $14.79 | $1.0M | — | View → |
| May 21, 2026 | May 26 11:10 PM | Constantin Ionel StefanChief Technology Officer | Sale | 28,812 | $14.79 | $426.1K | 804,518(D) | View → |
| May 21, 2026 | May 26 11:06 PM | Stefan Constantin Ionel | Proposed Sale | 28,812 | $14.79 | $426.1K | — | View → |
| May 21, 2026 | May 26 11:03 PM | Thomas M StepienDirector, Chief Executive Officer | Sale | 60,702 | $14.79 | $897.7K | 699,298(D) | View → |
| May 21, 2026 | May 26 11:02 PM | Thomas M. Stepien | Proposed Sale | 60,702 | $14.79 | $897.7K | — | View → |
| May 26, 2026 | May 26 8:08 PM | DIXON DONALD R | Proposed Sale | 17,895 | $17.65 | $315.8K | — | View → |
| Apr 1, 2026 | Apr 2 8:51 PM | Sun KangDirector | Sale | 1,500,000 | $15.91 | $23.9M | 1,342,400(D) | View → |
| Apr 1, 2026 | Apr 1 8:47 PM | KANG SUN | Proposed Sale | 1,500,000 | $16.86 | $25.3M | — | View → |
| Mar 23, 2026 | Mar 24 11:11 PM | Sun KangDirector | Sale | 217,869 | $18.80 | $4.1M | 56,406(I) | View → |
| Mar 23, 2026 | Mar 23 8:56 PM | KANG SUN | Proposed Sale | 192,727 | $18.20 | $3.5M | — | View → |
| Mar 12, 2026 | Mar 13 10:08 PM | Wen Hsuan HsiehDirector | Sale | 413,146 | $18.44 | $7.6M | 44,444(D) | View → |
| Mar 12, 2026 | Mar 12 11:25 PM | Steven ChuDirector | Sale | 155,565 | $18.50 | $2.9M | 127,339(D) | View → |
| Mar 10, 2026 | Mar 12 11:25 PM | Steven ChuDirector | Sale | 166,632 | $17.92 | $3.0M | 127,339(D) | View → |
| Mar 12, 2026 | Mar 12 9:11 PM | STEVEN CHU | Proposed Sale | 155,565 | $18.45 | $2.9M | — | View → |
| Mar 12, 2026 | Mar 12 9:04 PM | WEN HSUAN HSIEH | Proposed Sale | 413,146 | $18.44 | $7.6M | — | View → |
| Mar 10, 2026 | Mar 10 8:22 PM | STEVEN CHU | Proposed Sale | 166,632 | $17.92 | $3.0M | — | View → |
| Feb 23, 2026 | Feb 24 10:11 PM | Sun KangDirector | Sale | 61,251 | $10.16 | $622.0K | 1,342,400(D) | View → |
| Feb 23, 2026 | Feb 24 10:08 PM | Constantin Ionel StefanChief Technology Officer | Sale | 25,366 | $10.16 | $257.6K | 723,330(D) | View → |
| Feb 23, 2026 | Feb 24 10:08 PM | KANG SUN | Proposed Sale | 61,251 | $10.16 | $622.0K | — | View → |
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 → |