Summary
Updated Aug 31, 2026
John Anthony Maddison is Chief Product Mkting Officer of F5, INC. (FFIV). 5 SEC Form 4 filings on record going back to 2025, most recently on 4 August 2026. Most recent open-market trade: sold $406K of FFIV on 4 August 2026. Lifetime open-market sales: $1.01M.
Recent Transactions
9Every recent SEC Form 4 transaction John Anthony Maddison has reported, most recent first.
Trading Pattern
InsiderAlpha's records for John Anthony Maddison go back to 2025: 5 primary Form 4 filings, an average of 2.5 per year. 9 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 John Anthony Maddison 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.
- Francois Locoh-Donou - $6.03M of FFIV open-market activity in the last 12 months
- Thomas Dean Fountain - $3.54M of FFIV open-market activity in the last 12 months
- Chad Michael Whalen - $2.88M of FFIV open-market activity in the last 12 months
- Edward Cooper Werner - $2.53M of FFIV open-market activity in the last 12 months
- Nikhil Ramesh Mehta - $1.56M of FFIV open-market activity in the last 12 months
- Kunal Anand - $1.27M of FFIV 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 John Anthony Maddison?
John Anthony Maddison is a corporate insider, tracked as Chief Product Mkting Officer of F5, INC. (FFIV). InsiderAlpha holds 5 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has John Anthony Maddison submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has John Anthony Maddison been buying or selling stock?
Recorded transactions: 0 open-market purchases and 3 open-market sales ($1.01M) across all tracked filings.
Where can I see all of John Anthony Maddison'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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