Thomas M Stepien, Chief Executive Officer at Amprius Technologies, sold AMPX on Aug 21, 2026
Data as of Oct 27
▼ SELL$243K23,529 shares at $10.34Thomas M Stepien Chief Executive OfficerAMPX Amprius Technologies, Inc.
- Traded
- Aug 21, 2026
- Disclosed
- Aug 25, 2026
- Filed
- 4 days after the trade
Form 4s are due within two business days.
Official filing (SEC Form 4) ↗
The price around the disclosure
AMPX since disclosure
−12.8%
after the sale
Similar stocks (XLI) since disclosure
−5.9%
XLI — its sector index fund
Change in closing price from Aug 25, 2026 (the first trading day on or after disclosure) to Oct 27, 2026. Dividends excluded. Not a return anyone earned.
Our take
None of our tested rules fired on this trade.
Other trades in the same filing
- ▼ SELLThomas M Stepien Chief Executive OfficerAMPX Amprius Technologies, Inc.$80.2Kdisclosed Aug 25 · filed 1 day after the trade