Summary
Updated Aug 31, 2026
Kang Sun is Director of Amprius Technologies, Inc. (AMPX). 14 SEC Form 4 filings on record going back to 2024, most recently on 25 August 2026. Most recent open-market trade: sold $642K of AMPX on 25 August 2026. Lifetime open-market sales: $58.14M.
Recent Transactions
20Every recent SEC Form 4 transaction Kang Sun has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Kang Sun go back to 2024: 14 primary Form 4 filings, an average of 4.7 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Kang Sun files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Constantin Ionel Stefan - $8.60M of AMPX open-market activity in the last 12 months
- Wen Hsuan Hsieh - $7.62M of AMPX open-market activity in the last 12 months
- Steven Chu - $5.86M of AMPX open-market activity in the last 12 months
- Donald R. Dixon - $2.54M of AMPX open-market activity in the last 12 months
- Thomas M. Stepien - $1.34M of AMPX open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Kang Sun?
Kang Sun is a corporate insider, tracked as Director of Amprius Technologies, Inc. (AMPX). InsiderAlpha holds 14 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Kang Sun submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Kang Sun been buying or selling stock?
Recorded transactions: 0 open-market purchases and 15 open-market sales ($58.14M) across all tracked filings.
Where can I see all of Kang Sun's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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