Summary
Updated Aug 31, 2026
David A. Duffield is 10% Owner of Workday, Inc. (WDAY). 35 SEC Form 4 filings on record going back to 2024, most recently on 13 July 2026. Most recent open-market trade: sold $14K of WDAY on 13 July 2026. Lifetime open-market sales: $565.48M.
Recent Transactions
20Every recent SEC Form 4 transaction David A. Duffield has reported, most recent first.
Trading Pattern
InsiderAlpha's records for David A. Duffield go back to 2024: 35 primary Form 4 filings, an average of 11.7 per year. 258 recorded transactions carry a Rule 10b5-1 flag, meaning they were 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 David A. Duffield 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.
- Zane Rowe - $3.03M of WDAY open-market activity in the last 12 months
- Gerrit S. Kazmaier - $1.59M of WDAY open-market activity in the last 12 months
- Carl M. Eschenbach - $1.48M of WDAY open-market activity in the last 12 months
- Robert Enslin - $1.42M of WDAY open-market activity in the last 12 months
- Michael M. McNamara - $1.27M of WDAY open-market activity in the last 12 months
- Richard Harry Sauer - $1.08M of WDAY 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 David A. Duffield?
David A. Duffield is a corporate insider, tracked as 10% Owner of Workday, Inc. (WDAY). InsiderAlpha holds 35 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 David A. Duffield submitted recently?
10 primary Form 4 filings in the last 90 days, covering 1 company.
Has David A. Duffield been buying or selling stock?
Recorded transactions: 0 open-market purchases and 232 open-market sales ($565.48M) across all tracked filings.
Where can I see all of David A. Duffield'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.
Learn More
Follow David A. Duffield and every insider like them
A free account opens the full scored daily plan and every past day, a watchlist for any ticker, and 3 months of price history on every company page. No card.
Free plan available · Paid plans start with a 7-day free trial