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Insider selling
Constantin Ionel Stefan sold $307K of Amprius Technologies, Inc. (AMPX) stock
Constantin Ionel Stefan, Chief Technology Officer of Amprius Technologies, Inc. (AMPX), sold 29,681 shares of AMPX stock worth $307K, per an SEC Form 4 filed Aug 25, 2026.
It was an open-market sale.
The trade happened on Aug 21, 2026, 4 days before it was made public.
AMPX has moved -3.5% since the trade date, from $10.34 to $9.98 (Sep 22, 2026 close).
- Traded
- Aug 21, 2026
- Disclosed
- Aug 25, 2026
- Filing delay
- 4 days
- Price since
- -3.5%
- Role
- Chief Technology Officer
- Source
- SEC Form 4
More AMPX insider and Congress trades
From a public SEC Form 4, linked above. Not investment advice, and not a recommendation to buy or sell.