There have been 50 recent insider transactions recorded for Amprius Technologies, Inc. (AMPX), including 14 buys and 33 sells. Total insider buying was valued at RSU Award and total insider selling at $10.41M.
Notable insiders with recent activity include Sun Kang, Chu Steven, Hsieh Wen Hsuan. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.
Insider Transactions — AMPX
| Date |
Name |
Role |
Transaction |
Shares |
Avg. Price |
Value |
Shares Owned |
| 2026-04-01 |
Sun Kang |
Director |
Option Exercise (Sell) |
1,312,505 |
$1.78 |
$2.34M |
- |
| 2026-03-23 |
Sun Kang |
Director |
Informative Sell |
65,046 |
$19.06 |
$1.24M |
56,406 |
| 2026-03-12 |
Chu Steven |
Director |
Option Exercise (Sell) |
69,422 |
$0.62 |
$43.04K |
- |
| 2026-03-12 |
Hsieh Wen Hsuan |
Director |
Option Exercise (Sell) |
270,251 |
$2.61 |
$705.36K |
- |
| 2026-03-10 |
Chu Steven |
Director |
Option Exercise (Sell) |
104,132 |
$0.62 |
$64.56K |
69,422 |
| 2026-03-04 |
Rodriguez Ricardo C. |
Chief Financial Officer |
RSU Award |
150,000 |
- |
- |
350,000 |
| 2026-03-04 |
Stefan Constantin Ionel |
Chief Technology Officer |
RSU Award |
110,000 |
- |
- |
833,330 |
| 2026-03-04 |
Stepien Thomas M |
Chief Executive Officer |
RSU Award |
150,000 |
- |
- |
760,000 |
| 2026-02-23 |
Sun Kang |
Director |
Informative Sell |
61,251 |
$10.16 |
$622.03K |
1,342,400 |
| 2026-02-23 |
Stefan Constantin Ionel |
Chief Technology Officer |
Informative Sell |
25,366 |
$10.16 |
$257.6K |
723,330 |
| 2026-01-28 |
Stefan Constantin Ionel |
Chief Technology Officer |
Option Exercise (Sell) |
39,600 |
$0.05 |
$1.98K |
- |
| 2026-01-23 |
Stefan Constantin Ionel |
Chief Technology Officer |
Option Exercise (Sell) |
1,600 |
$0.05 |
$80.00 |
39,600 |
| 2026-01-22 |
Stefan Constantin Ionel |
Chief Technology Officer |
Option Exercise (Sell) |
166,104 |
$0.05 |
$8.31K |
- |
| 2026-01-21 |
Stefan Constantin Ionel |
Chief Technology Officer |
Option Exercise (Sell) |
41,563 |
$0.62 |
$25.77K |
90 |
| 2026-01-20 |
Sun Kang |
Director |
Option Exercise (Sell) |
43,185 |
$1.78 |
$76.87K |
1,312,505 |
| 2026-01-16 |
Sun Kang |
Director |
Option Exercise (Sell) |
850,338 |
$2.50 |
$2.13M |
- |
| 2026-01-12 |
Sun Kang |
Director |
Option Exercise (Sell) |
208,264 |
$2.44 |
$508.16K |
- |
| 2025-12-19 |
Stepien Thomas M |
President |
RSU Award |
200,000 |
- |
- |
610,000 |
| 2025-12-11 |
Stefan Constantin Ionel |
Chief Technology Officer |
Option Exercise (Sell) |
125,000 |
$0.05 |
$6.25K |
310,962 |
| 2025-11-21 |
Sun Kang |
Chief Executive Officer |
Informative Sell |
68,655 |
$10.08 |
$692.13K |
1,403,651 |
| 2025-11-21 |
Stefan Constantin Ionel |
Chief Technology Officer |
Informative Sell |
25,024 |
$10.08 |
$252.27K |
821,951 |
| 2025-11-17 |
Sun Kang |
Chief Executive Officer |
Option Exercise (Sell) |
41,653 |
$0.62 |
$25.82K |
- |
| 2025-10-06 |
Rodriguez Ricardo C. |
Officer |
Unknown |
- |
- |
- |
- |
| 2025-10-06 |
Rodriguez Ricardo C. |
Chief Financial Officer |
RSU Award |
200,000 |
- |
- |
200,000 |
| 2025-08-21 |
Sun Kang |
Chief Executive Officer |
Informative Sell |
65,654 |
$6.82 |
$447.51K |
1,472,306 |
| 2025-08-21 |
Wallach Sandra |
Chief Financial Officer |
Informative Sell |
28,390 |
$6.82 |
$193.51K |
1,005,275 |
| 2025-08-21 |
Stefan Constantin Ionel |
Chief Technology Officer |
Informative Sell |
19,159 |
$6.82 |
$130.59K |
846,975 |
| 2025-06-13 |
Dixon Donald R |
Director |
RSU Award |
44,444 |
- |
- |
394,656 |
| 2025-06-13 |
Bayless Kathleen A |
Director |
RSU Award |
44,444 |
- |
- |
205,697 |
| 2025-06-13 |
Chu Steven |
Director |
RSU Award |
44,444 |
- |
- |
189,839 |
| 2025-06-13 |
Satterthwaite Livingston |
Director |
RSU Award |
44,444 |
- |
- |
336,083 |
| 2025-06-13 |
Hsieh Wen Hsuan |
Director |
RSU Award |
44,444 |
- |
- |
187,339 |
| 2025-05-21 |
Sun Kang |
Chief Executive Officer |
Informative Sell |
69,786 |
$2.43 |
$169.72K |
1,812,235 |
| 2025-05-21 |
Wallach Sandra |
Chief Financial Officer |
Informative Sell |
27,595 |
$2.43 |
$67.11K |
1,033,665 |
| 2025-05-21 |
Stefan Constantin Ionel |
Chief Technology Officer |
Informative Sell |
20,366 |
$2.43 |
$49.53K |
866,134 |
| 2025-05-01 |
Stepien Thomas M |
President |
Unknown |
- |
- |
- |
- |
| 2025-05-01 |
Stepien Thomas M |
President |
RSU Award |
400,000 |
- |
- |
400,000 |
| 2025-05-01 |
Stepien Thomas M |
President |
Unknown |
- |
- |
- |
10,000 |
| 2025-03-19 |
Sun Kang |
Chief Executive Officer |
RSU Award |
599,400 |
- |
- |
1,882,021 |
| 2025-03-19 |
Wallach Sandra |
Chief Financial Officer |
RSU Award |
383,260 |
- |
- |
1,061,260 |
| 2025-03-19 |
Stefan Constantin Ionel |
Chief Technology Officer |
RSU Award |
461,540 |
- |
- |
886,500 |
| 2025-03-14 |
Stefan Constantin Ionel |
Chief Technology Officer |
Option Exercise (Sell) |
3,471 |
$0.98 |
$3.4K |
- |
| 2025-03-10 |
Bornstein Jonathan |
President of Amprius Lab |
Option Exercise (Sell) |
3,471 |
$0.98 |
$3.4K |
- |
| 2025-02-21 |
Sun Kang |
Chief Executive Officer |
Informative Sell |
34,353 |
$3.13 |
$107.63K |
1,282,621 |
| 2025-02-21 |
Wallach Sandra |
Chief Financial Officer |
Informative Sell |
18,142 |
$3.13 |
$56.84K |
678,000 |
| 2025-02-21 |
Stefan Constantin Ionel |
Chief Technology Officer |
Informative Sell |
9,066 |
$3.13 |
$28.41K |
421,489 |
| 2025-02-21 |
Bornstein Jonathan |
President of Amprius Lab |
Informative Sell |
13,527 |
$3.13 |
$42.38K |
419,197 |
| 2024-11-21 |
Sun Kang |
Chief Executive Officer |
Informative Sell |
33,779 |
$1.96 |
$66.36K |
1,316,974 |
| 2024-11-21 |
Wallach Sandra |
Chief Financial Officer |
Informative Sell |
17,158 |
$1.96 |
$33.71K |
696,142 |
| 2024-11-21 |
Stefan Constantin Ionel |
Chief Technology Officer |
Informative Sell |
8,575 |
$1.96 |
$16.85K |
430,555 |
■ Informative Buy/Sell — open market transaction (most significant)
■ Uninformative Buy — award, option exercise, conversion
■ Uninformative Sell — tax withholding, award vest sale
■ Neutral — gift, trust, expiry
