Summary
Updated Aug 31, 2026
Boudewijn Duinstra is EVP, CHIEF RISK OFFICER of Cboe Global Markets, Inc. (CBOE). 1 SEC Form 4 filing on record, dated 21 August 2026.
Trading Pattern
InsiderAlpha's records for Boudewijn Duinstra go back to 2026: 1 primary Form 4 filing, 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 Boudewijn Duinstra 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.
- Christopher A. Isaacson - $1.18M of CBOE open-market activity in the last 12 months
- Edward J. Fitzpatrick - $1.13M of CBOE open-market activity in the last 12 months
- Janet P. Froetscher - $699K of CBOE open-market activity in the last 12 months
- Alexander Matturri Jr. - $428K of CBOE open-market activity in the last 12 months
- Allen Wilkinson - $73K of CBOE 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 Boudewijn Duinstra?
Boudewijn Duinstra is a corporate insider, tracked as EVP, CHIEF RISK OFFICER of Cboe Global Markets, Inc. (CBOE). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Boudewijn Duinstra submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Where can I see all of Boudewijn Duinstra'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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