Summary
Updated Aug 31, 2026
George Bickerstaff is Director of CareDx, Inc. (CDNA). 5 SEC Form 4 filings on record going back to 2024, most recently on 6 August 2026. Most recent open-market trade: sold $926K of CDNA on 6 August 2026. Lifetime open-market sales: $926K.
Recent Transactions
6Every recent SEC Form 4 transaction George Bickerstaff has reported, most recent first.
Trading Pattern
InsiderAlpha's records for George Bickerstaff go back to 2024: 5 primary Form 4 filings, an average of 1.7 per year. 1 recorded transaction carries a Rule 10b5-1 flag, meaning it was pre-scheduled under a written trading plan rather than discretionary.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies George Bickerstaff 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.
- John Walter Hanna Jr. - $7.54M of CDNA open-market activity in the last 12 months
- Michael Goldberg - $2.10M of CDNA open-market activity in the last 12 months
- Hannah Valantine - $1.32M of CDNA open-market activity in the last 12 months
- Christine Cournoyer - $751K of CDNA open-market activity in the last 12 months
- Jeffrey Adam Novack - $453K of CDNA open-market activity in the last 12 months
- Arthur A. Torres - $215K of CDNA 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 George Bickerstaff?
George Bickerstaff is a corporate insider, tracked as Director of CareDx, Inc. (CDNA). InsiderAlpha holds 5 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 George Bickerstaff submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Has George Bickerstaff been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($926K) across all tracked filings.
Where can I see all of George Bickerstaff'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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