Summary
Updated Aug 30, 2026
William A. Hagstrom files SEC Form 4 reports at CareDx, Inc. (CDNA). 2 SEC Form 4 filings on record, most recently on 11 June 2025. Most recent open-market trade: sold $386K of CDNA on 11 June 2025. Lifetime open-market sales: $909K.
Recent Transactions
7Every recent SEC Form 4 transaction William A. Hagstrom has reported, most recent first.
Trading Pattern
InsiderAlpha's records for William A. Hagstrom go back to 2025: 2 primary Form 4 filings, an average of 1.0 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 William A. Hagstrom 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
- George Bickerstaff - $926K 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
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is William A. Hagstrom?
William A. Hagstrom is a corporate insider of CareDx, Inc. (CDNA). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did William A. Hagstrom last file a Form 4?
The most recent primary Form 4 on record is dated 11 June 2025, one of 2 filings going back to 2025.
Has William A. Hagstrom been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($909K) across all tracked filings.
Where can I see all of William A. Hagstrom'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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