Summary
Updated Aug 31, 2026
Kathleen A. Bayless is Director of Amprius Technologies, Inc. (AMPX). 4 SEC Form 4 filings on record going back to 2025, most recently on 16 June 2026.
Recent Transactions
4Every recent SEC Form 4 transaction Kathleen A. Bayless has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Kathleen A. Bayless go back to 2025: 4 primary Form 4 filings, an average of 2.0 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 Kathleen A. Bayless 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.
- Kang Sun - $57.62M of AMPX open-market activity in the last 12 months
- 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 Kathleen A. Bayless?
Kathleen A. Bayless is a corporate insider, tracked as Director of Amprius Technologies, Inc. (AMPX). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Kathleen A. Bayless submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Where can I see all of Kathleen A. Bayless'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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