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 |
|---|---|---|---|---|---|---|---|---|
| Feb 23, 2026 | Feb 24 10:07 PM | Stefan Constantin Ionel | Proposed Sale | 25,366 | $10.16 | $257.7K | — | View → |
| Jan 28, 2026 | Jan 30 11:02 PM | Constantin Ionel StefanChief Technology Officer | Sale | 39,690 | $12.00 | $476.4K | 748,696(D) | View → |
| Jan 23, 2026 | Jan 23 10:36 PM | Constantin Ionel StefanChief Technology Officer | Sale | 1,600 | $12.00 | $19.2K | 748,696(D) | View → |
| Jan 22, 2026 | Jan 23 10:36 PM | Constantin Ionel StefanChief Technology Officer | Sale | 492,827 | $12.04 | $5.9M | 748,696(D) | View → |
| Jan 21, 2026 | Jan 23 10:36 PM | Constantin Ionel StefanChief Technology Officer | Sale | 73,280 | $12.00 | $879.4K | 748,696(D) | View → |
| Jan 21, 2026 | Jan 21 9:23 PM | Stefan Constantin Ionel | Proposed Sale | 717,307 | $11.17 | $8.0M | — | View → |
| Jan 20, 2026 | Jan 20 10:33 PM | Sun KangDirector | Sale | 43,185 | $11.03 | $476.3K | 1,403,651(D) | View → |
| Jan 16, 2026 | Jan 20 10:33 PM | Sun KangDirector | Sale | 950,548 | $11.07 | $10.5M | 1,403,651(D) | View → |
| Jan 16, 2026 | Jan 16 9:22 PM | KANG SUN | Proposed Sale | 1,018,875 | $10.15 | $10.3M | — | View → |
| Jan 12, 2026 | Jan 12 9:27 PM | KANG SUN | Proposed Sale | 506,267 | $9.48 | $4.8M | — | View → |
| Dec 11, 2025 | Dec 11 9:28 PM | Stefan Constantin Ionel | Proposed Sale | 198,255 | $11.04 | $2.2M | — | View → |
| Nov 21, 2025 | Nov 25 11:45 PM | Kang Sun | Proposed Sale | 68,655 | $10.08 | $692.1K | — | View → |
| Nov 21, 2025 | Nov 25 11:44 PM | Stefan Constantin Ionel | Proposed Sale | 25,024 | $10.08 | $252.3K | — | View → |
| Nov 17, 2025 | Nov 17 9:36 PM | KANG SUN | Proposed Sale | 1,000,000 | $11.29 | $11.3M | — | View → |
| Aug 21, 2025 | Aug 25 11:34 PM | Stefan Constantin Ionel | Proposed Sale | 19,159 | $6.82 | $130.6K | — | View → |
| Aug 21, 2025 | Aug 25 11:33 PM | Kang Sun | Proposed Sale | 65,654 | $6.82 | $447.5K | — | View → |
| Aug 21, 2025 | Aug 25 11:33 PM | Sandra Wallach | Proposed Sale | 28,390 | $6.82 | $193.5K | — | View → |
| May 21, 2025 | May 23 9:46 PM | Constantin Ionel Stefan | Proposed Sale | 20,366 | $2.43 | $49.5K | — | View → |
| May 21, 2025 | May 23 9:44 PM | Sandra Wallach | Proposed Sale | 27,595 | $2.43 | $67.1K | — | View → |
| May 21, 2025 | May 23 9:43 PM | Kang Sun | Proposed Sale | 69,786 | $2.43 | $169.7K | — | 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 → |