Stefan Constantin Ionel (CIK 1940928) reported 23 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-08-25). Recent activity: Sell AMPX (29,681 shares), Sell AMPX (3,208 shares), Sell AMPX (28,812 shares), Buy AMPX (110,000 shares), Sell AMPX (25,366 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-25 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Sell | 29,681 | $306,931 |
| 2026-05-28 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Sell | 3,208 | $55,146 |
| 2026-05-26 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Sell | 28,812 | $426,129 |
| 2026-03-06 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Buy | 110,000 | $0 |
| 2026-02-24 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Sell | 25,366 | $257,719 |
| 2026-01-30 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Buy | 90 | $56 |
| 2026-01-30 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Buy | 39,600 | $1,980 |
| 2026-01-30 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Sell | 39,690 | $476,280 |
| 2026-01-23 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Buy | 41,563 | $25,769 |
| 2026-01-23 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Buy | 15,834 | $792 |
| 2026-01-23 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Buy | 15,883 | $794 |
| 2026-01-23 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Sell | 73,280 | $879,360 |
| 2026-01-23 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Buy | 253,928 | $12,696 |
| 2026-01-23 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Buy | 72,795 | $32,758 |
| 2026-01-23 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Buy | 166,104 | $8,305 |
| 2026-01-23 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Sell | 492,827 | $5.9M |
| 2026-01-23 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Buy | 1,600 | $80 |
| 2026-01-23 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Sell | 1,600 | $19,200 |
| 2025-12-15 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Buy | 125,000 | $6,250 |
| 2025-12-15 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Sell | 198,255 | $2.1M |
| 2025-11-25 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Sell | 25,024 | $252,242 |
| 2025-08-25 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Sell | 19,159 | $130,664 |
| 2025-05-23 | Amprius Technologies, Inc. (AMPX) | Chief Technology Officer | Sell | 20,366 | $49,489 |
来源：SEC Form 4 申报文件 · 截至 2026-08-25