Insiders / Stefan Constantin Ionel
Stefan Constantin Ionel
CIK 1940928personinsider
Companies
1
First seen
Jan 23, 2026
Last activity
Mar 6, 2026
Companies
| Company | Shares held | Latest |
|---|---|---|
| Amprius Technologies, Inc. · AMPX | 833,330 | — |
All securities held
1 position · latest reported per filing
| Company | Security | Shares |
|---|---|---|
| Amprius Technologies, Inc. | Common stock | 833,330 |
Activity
InsidersInstitutions
This person's insider trades (Form 4), across every company.| Date | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|
| Jan 22, 2026 | Sell | AMPX Amprius Technologies, Inc. Common stock | $5.93M | -493K -39.70% | 748,696 0.51% of shares | medium |
| Jan 21, 2026 | Sell | AMPX Amprius Technologies, Inc. Common stock | $879.4K | -73K -8.92% | 748,696 0.51% of shares | medium |
| Jan 28, 2026 | Sell | AMPX Amprius Technologies, Inc. Common stock | $476.4K | -40K -5.03% | 748,696 0.51% of shares | medium |
| Feb 23, 2026 | Sell | AMPX Amprius Technologies, Inc. Common stock | $257.6K | -25K -3.39% | 723,330 0.50% of shares | medium |
| Jan 22, 2026 | Exercise | AMPX Amprius Technologies, Inc. Common stock | $32.8K | +73K +7.26% | 1,075,419 0.74% of shares | low |
| Jan 21, 2026 | Exercise | AMPX Amprius Technologies, Inc. Common stock | $25.8K | +42K +5.55% | 790,259 0.54% of shares | low |
| Jan 23, 2026 | Sell | AMPX Amprius Technologies, Inc. Common stock | $19.2K | -2K -0.21% | 748,696 0.51% of shares | low |
| Jan 22, 2026 | Exercise | AMPX Amprius Technologies, Inc. Common stock | $12.7K | +254K +33.92% | 1,002,624 0.69% of shares | low |
| Jan 22, 2026 | Exercise | AMPX Amprius Technologies, Inc. Common stock | $8.3K | +166K +15.45% | 1,241,523 0.85% of shares | low |
| Jan 28, 2026 | Exercise | AMPX Amprius Technologies, Inc. Common stock | $2.0K | +40K +5.29% | 788,386 0.54% of shares | low |