Summary
Updated Aug 31, 2026
William D. Waddill is Director of Protagonist Therapeutics, Inc (PTGX). 10 SEC Form 4 filings on record going back to 2024, most recently on 25 June 2026. Most recent open-market trade: sold $1.06M of PTGX on 25 June 2026. Lifetime open-market sales: $6.24M.
Recent Transactions
17Every recent SEC Form 4 transaction William D. Waddill has reported, most recent first.
Trading Pattern
InsiderAlpha's records for William D. Waddill go back to 2024: 10 primary Form 4 filings, an average of 3.3 per year. 17 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 William D. Waddill 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.
- Dinesh V. Ph D. Patel - $42.34M of PTGX open-market activity in the last 12 months
- Muneer A. Satter - $11.97M of ANNX open-market activity in the last 12 months
- Asif Ali - $7.32M of PTGX open-market activity in the last 12 months
- Bryan Giraudo - $5.92M of PTGX open-market activity in the last 12 months
- Arturo Md Molina - $4.49M of PTGX open-market activity in the last 12 months
- Harold E. Selick - $2.52M of PTGX 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 D. Waddill?
William D. Waddill is a corporate insider, tracked as Director of Protagonist Therapeutics, Inc (PTGX). InsiderAlpha holds 10 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 William D. Waddill submitted recently?
3 primary Form 4 filings in the last 90 days, covering 2 companies.
Has William D. Waddill been buying or selling stock?
Recorded transactions: 0 open-market purchases and 10 open-market sales ($6.24M) across all tracked filings.
Where can I see all of William D. Waddill'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 William D. Waddill 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