Summary
Updated Aug 31, 2026
David A. Brown is Director of MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX). 6 SEC Form 4 filings on record going back to 2025, most recently on 9 July 2026. Most recent open-market trade: sold $1.20M of HG on 20 May 2026. Lifetime open-market sales: $1.60M.
Recent Transactions
6Every recent SEC Form 4 transaction David A. Brown has reported, most recent first.
Trading Pattern
InsiderAlpha's records for David A. Brown go back to 2025: 6 primary Form 4 filings, an average of 3.0 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 David A. Brown 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.
- Thomas P. Gallagher - $30.31M of MIAX open-market activity in the last 12 months
- Douglas M. Schafer Jr. - $10.40M of MIAX open-market activity in the last 12 months
- Murray Stahl - $8.70M of MIAX open-market activity in the last 12 months
- Barbara J. Comly - $8.18M of MIAX open-market activity in the last 12 months
- Shelly Brown - $4.16M of MIAX open-market activity in the last 12 months
- Lance Emmons - $3.47M of MIAX 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. Brown?
David A. Brown is a corporate insider, tracked as Director of MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX). InsiderAlpha holds 6 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 David A. Brown submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Has David A. Brown been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($1.60M) across all tracked filings.
Where can I see all of David A. Brown'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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