Constantin Ionel Stefan, Chief Technology Officer at Amprius Technologies, Inc. (AMPX), sold 396,510 shares at $10.51 ($4.2M) on 2025-12-11, disclosed to the SEC on 2025-12-15.
Open-market sale of $4.2M AMPX by Chief Technology Officer. Not flagged as scheduled, tax-driven, or recurring — but no specific bearish signal from our filters. Reasons for insider sales vary widely.
Something here stands out, but not much.
| # | Price | Shares | Value | % of Total |
|---|---|---|---|---|
| 1 | $10.51 | 198,255 | $2.1M | 50.0% |
| 2 | $10.51 | 198,255 | $2.1M | 50.0% |
| Total | $10.51 avg | 396,510 | $4.2M | 100% |
| Filing → |
| AMPX | SELL | 2026-05-26 | $426K | — | Filing → |
| AMPX | SELL | 2026-02-24 | $258K | — | Filing → |
| AMPX | SELL | 2026-01-30 | $953K | — | Filing → |