10 insiders reported 95 Form 4 transactions for Amprius Technologies, Inc. (AMPX) over the past 18 months (most recent 2026-08-25). Recent activity: Sun Kang (Director) Sell 62,101 shares, Stefan Constantin Ionel (Chief Technology Officer) Sell 29,681 shares, Stepien Thomas M (Chief Executive Officer) Sell 23,529 shares, Stepien Thomas M (Chief Executive Officer) Sell 8,000 shares, Stepien Thomas M (Chief Executive Officer) Sell 5,000 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-25 | Sun Kang | Director | Sell | 62,101 | $642,186 |
| 2026-08-25 | Stefan Constantin Ionel | Chief Technology Officer | Sell | 29,681 | $306,931 |
| 2026-08-25 | Stepien Thomas M | Chief Executive Officer | Sell | 23,529 | $243,313 |
| 2026-08-25 | Stepien Thomas M | Chief Executive Officer | Sell | 8,000 | $80,240 |
| 2026-08-25 | Stepien Thomas M | Chief Executive Officer | Sell | 5,000 | $0 |
| 2026-08-25 | Stepien Thomas M | Chief Executive Officer | Sell | 5,000 | $0 |
| 2026-08-25 | Stepien Thomas M | Chief Executive Officer | Sell | 5,000 | $0 |
| 2026-08-25 | Stepien Thomas M | Chief Executive Officer | Sell | 346 | $0 |
| 2026-08-25 | Stepien Thomas M | Chief Executive Officer | Buy | 346 | $0 |
| 2026-06-16 | DIXON DONALD R | Director | Buy | 10,423 | $0 |
| 2026-06-16 | Chu Steven | Director | Buy | 10,423 | $0 |
| 2026-06-16 | BAYLESS KATHLEEN A | Director | Buy | 10,423 | $0 |
| 2026-06-16 | SATTERTHWAITE LIVINGSTON | Director | Buy | 10,423 | $0 |
| 2026-06-16 | DIXON DONALD R | Director | Sell | 85,000 | $1.5M |
| 2026-06-11 | DIXON DONALD R | Director | Sell | 40,000 | $765,200 |
| 2026-06-05 | Stepien Thomas M | Chief Executive Officer | Sell | 30,384 | $0 |
| 2026-06-05 | Stepien Thomas M | Chief Executive Officer | Sell | 36,914 | $0 |
| 2026-06-05 | Stepien Thomas M | Chief Executive Officer | Buy | 36,914 | $0 |
| 2026-06-05 | Stepien Thomas M | Chief Executive Officer | Sell | 2,000 | $41,940 |
| 2026-05-28 | Stepien Thomas M | Chief Executive Officer | Sell | 4,375 | $75,206 |
| 2026-05-28 | Sun Kang | Director | Sell | 356 | $6,120 |
| 2026-05-28 | DIXON DONALD R | Director | Sell | 17,895 | $320,320 |
| 2026-05-28 | Stefan Constantin Ionel | Chief Technology Officer | Sell | 3,208 | $55,146 |
| 2026-05-26 | Stepien Thomas M | Chief Executive Officer | Sell | 60,702 | $897,783 |
| 2026-05-26 | Sun Kang | Director | Sell | 67,796 | $1.0M |
Source: SEC Form 4 filings · as of 2026-08-25