Summary
Updated Aug 31, 2026
William F. Ziebell is VICE PRESIDENT of Arthur J. Gallagher & Co. (AJG). 3 SEC Form 4 filings on record going back to 2024, most recently on 2 April 2026.
Recent Transactions
8Every recent SEC Form 4 transaction William F. Ziebell has reported, most recent first.
Trading Pattern
InsiderAlpha's records for William F. Ziebell go back to 2024: 3 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 F. Ziebell 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.
- Walter D. Bay - $7.28M of AJG open-market activity in the last 12 months
- Douglas K. Howell - $6.38M of AJG open-market activity in the last 12 months
- J. Patrick Gallagher Jr. - $6.32M of AJG open-market activity in the last 12 months
- Scott R. Hudson - $4.69M of AJG open-market activity in the last 12 months
- Christopher E. Mead - $3.15M of AJG open-market activity in the last 12 months
- Richard C. Cary - $2.18M of AJG 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 F. Ziebell?
William F. Ziebell is a corporate insider, tracked as VICE PRESIDENT of Arthur J. Gallagher & Co. (AJG). InsiderAlpha holds 3 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did William F. Ziebell last file a Form 4?
The most recent primary Form 4 on record is dated 2 April 2026, one of 3 filings going back to 2024.
Where can I see all of William F. Ziebell'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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