Kang Sun $AMPX SEC Form 4 Insider Trading

Kang Sun has filed a total of 13 insider trades in $AMPX since 2021. Their most recent trade was a sale of 61,251 shares, made on Feb 23, 2026. Their largest trade was a sale of 1.0 million shares, made on Nov 17, 2025. We estimate that they now own 1.3 million shares of $AMPX, worth an estimated $18.3 million.

Insider Trading at $AMPX

There have been a total of 98 insider trades reported at $AMPX since 2021, with 0 shares purchased and 8.0 million shares sold. The most active insider traders in $AMPX stock have been Jonathan Bornstein, Constantin Ionel Stefan, and Kang Sun. The most recent trade was a sale of 61,251 shares reported by Kang Sun (None), made on Feb 23, 2026.

$AMPX Executives and Stock Owners with Insider Trades

• Jonathan Bornstein, President of Amprius Lab

• Constantin Ionel Stefan, Chief Technology Officer

• Kang Sun, Chief Executive Officer

• Sandra Wallach, Chief Financial Officer

• Kang Sun, See Remarks

*This is only based off of information found in SEC filings, and may not reflect actual net worth. There may also be inaccuracies due to privately holdings filing errors, parsing errors, accidental double-counting of shares, incorrect classification of indirectly owned shares, sales prior to dataset start date, or any other number of issues.