MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX)
Data as of , from SEC Form 4 filings.
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About MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX)
MIAMI INTERNATIONAL HOLDINGS, INC. files with the SEC under CIK 0001438472 and is classified as security brokers, dealers and flotation companies. It is grouped with Financials companies on this site. It filed a registration statement with the SEC on 9 December 2025 and has not yet priced an offering.
MIAX Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 18 | 585,749 | $24.62M |
| Option exercise | 38 | 838,446 | |
| Tax withholding / forfeiture | 3 | 210,003 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
MIAX insider transactions (Form 4)
75144 Form 4 filings on record, the earliest from Aug 13, 2025, newest first. Filing history page 2 of 3.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Barbara J. Comly - Officer | Option exercise | Common Stock | 28,000 | $12.00 | $336K | |
| Barbara J. Comly - Officer | Open-market sale | Common Stock | 28,000 | $41.22 footnote F2 | $1.15M | |
| Barbara J. Comly - Officer | Option exercise | Nonqualified Stock Option (Right to Buy) | 28,000 | $0.00 | - | |
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| Douglas M. Schafer Jr. - Officer | Option exercise | Common Stock | 6,000 | $12.00 | $72K | |
| Douglas M. Schafer Jr. - Officer | Option exercise | Common Stock | 42,000 | $12.00 | $504K | |
| Douglas M. Schafer Jr. - Officer | Open-market sale | Common Stock | 48,000 | $41.22 footnote F2 | $1.98M | |
| Douglas M. Schafer Jr. - Officer | Option exercise | Nonqualified Stock Option (Right to Buy) | 6,000 | $0.00 | - | |
| Douglas M. Schafer Jr. - Officer | Option exercise | Nonqualified Stock Option (Right to Buy) | 42,000 | $0.00 | - | |
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| Cees Vermaas - Officer | Grant or award | Common Stock | 4,660 footnote F1 | $0.00 | - | |
| Cees Vermaas - Officer | Grant or award | Nonqualified Stock Option (Right to Buy) | 4,793 | $0.00 | - | |
| ||||||
| Grant or award | Common Stock | 4,660 footnote F1 | $0.00 | - | ||
| Grant or award | Incentive Stock Option (Right to Buy) | 2,485 | $0.00 | - | ||
| Grant or award | Nonqualified Stock Option (Right to Buy) | 34,808 | $0.00 | - | ||
| ||||||
| Edward Deitzel - Officer | Grant or award | Incentive Stock Option (Right to Buy) | 2,485 | $0.00 | - | |
| Edward Deitzel - Officer | Grant or award | Nonqualified Stock Option (Right to Buy) | 7,101 | $0.00 | - | |
| Edward Deitzel - Officer | Grant or award | Common Stock | 9,319 footnote F1 | $0.00 | - | |
| ||||||
| John Smollen - Officer | Grant or award | Common Stock | 7,455 footnote F1 | $0.00 | - | |
| John Smollen - Officer | Grant or award | Incentive Stock Option (Right to Buy) | 2,485 | $0.00 | - | |
| John Smollen - Officer | Grant or award | Nonqualified Stock Option (Right to Buy) | 5,184 | $0.00 | - | |
| ||||||
| Douglas M. Schafer Jr. - Officer | Grant or award | Nonqualified Stock Option (Right to Buy) | 21,481 | $0.00 | - | |
| Douglas M. Schafer Jr. - Officer | Grant or award | Common Stock | 23,298 footnote F1 | $0.00 | - | |
| Douglas M. Schafer Jr. - Officer | Grant or award | Incentive Stock Option (Right to Buy) | 2,485 | $0.00 | - | |
| ||||||
| Lance Emmons - Officer | Grant or award | Common Stock | 37,276 footnote F1 | $0.00 | - | |
| Lance Emmons - Officer | Grant or award | Incentive Stock Option (Right to Buy) | 2,485 | $0.00 | - | |
| Lance Emmons - Officer | Grant or award | Nonqualified Stock Option (Right to Buy) | 35,861 | $0.00 | - | |
| ||||||
| Shelly Brown - Officer | Grant or award | Nonqualified Stock Option (Right to Buy) | 35,861 | $0.00 | - | |
| Shelly Brown - Officer | Grant or award | Common Stock | 37,276 footnote F1 | $0.00 | - | |
| Shelly Brown - Officer | Grant or award | Incentive Stock Option (Right to Buy) | 2,485 | $0.00 | - | |
| ||||||
| Barbara J. Comly - Officer | Grant or award | Common Stock | 39,140 footnote F1 | $0.00 | - | |
| Barbara J. Comly - Officer | Grant or award | Incentive Stock Option (Right to Buy) | 2,485 | $0.00 | - | |
| Barbara J. Comly - Officer | Grant or award | Nonqualified Stock Option (Right to Buy) | 37,778 | $0.00 | - | |
| ||||||
| Grant or award | Nonqualified Stock Option (Right to Buy) | 237,175 | $0.00 | - | ||
| Grant or award | Common Stock | 232,977 footnote F1 | $0.00 | - | ||
| Grant or award | Incentive Stock Option (Right to Buy) | 2,485 | $0.00 | - | ||
| ||||||
| David A. Brown - Director | Grant or award | Common Stock | 2,267 footnote F1 | $0.00 | - | |
| David A. Brown - Director | Grant or award | Common Stock | 4,970 footnote F2 | $0.00 | - | |
| David A. Brown - Director | Grant or award | Nonqualified Stock Option (Right to Buy) | 5,142 | $0.00 | - | |
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| Grant or award | Common Stock | 2,267 footnote F1 | $0.00 | - | ||
| Grant or award | Common Stock | 4,970 footnote F2 | $0.00 | - | ||
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| Kenneth W. Lozier - Director | Grant or award | Common Stock | 2,267 footnote F1 | $0.00 | - | |
| Kenneth W. Lozier - Director | Grant or award | Common Stock | 4,970 footnote F2 | $0.00 | - | |
| Kenneth W. Lozier - Director | Grant or award | Nonqualified Stock Option (Right to Buy) | 2,571 | $0.00 | - | |
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| Jill E. Sommers - Director | Grant or award | Nonqualified Stock Option (Right to Buy) | 2,571 | $0.00 | - | |
| Jill E. Sommers - Director | Grant or award | Common Stock | 1,113 footnote F1 | $0.00 | - | |
| Jill E. Sommers - Director | Grant or award | Common Stock | 4,970 footnote F2 | $0.00 | - | |
| ||||||
| Grant or award | Common Stock | 4,970 footnote F2 | $0.00 | - | ||
| Grant or award | Nonqualified Stock Option (Right to Buy) | 5,142 | $0.00 | - | ||
| Grant or award | Common Stock | 2,267 footnote F1 | $0.00 | - | ||
| ||||||
| Grant or award | Common Stock | 2,267 footnote F1 | $0.00 | - | ||
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| Mark I. Massad - Director | Grant or award | Common Stock | 2,267 footnote F1 | $0.00 | - | |
| Mark I. Massad - Director | Grant or award | Common Stock | 4,970 footnote F2 | $0.00 | - | |
| ||||||
| Lisa Moore - Director | Grant or award | Common Stock | 2,267 footnote F1 | $0.00 | - | |
| Lisa Moore - Director | Grant or award | Common Stock | 4,970 footnote F2 | $0.00 | - | |
| ||||||
| Mark F. Raymond - Director | Grant or award | Common Stock | 4,970 footnote F2 | $0.00 | - | |
| Mark F. Raymond - Director | Option exercise | Stock Option (Right to Buy) | 16,000 | $0.00 | - | |
| Mark F. Raymond - Director | Option exercise | Common Stock | 16,000 | $12.00 | $192K | |
| Mark F. Raymond - Director | Grant or award | Common Stock | 2,267 footnote F1 | $0.00 | - | |
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| Paul Stahlin - Director | Grant or award | Common Stock | 4,970 footnote F2 | $0.00 | - | |
| Paul Stahlin - Director | Grant or award | Common Stock | 2,267 footnote F1 | $0.00 | - | |
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| Grant or award | Common Stock | 2,267 footnote F1 | $0.00 | - | ||
| Grant or award | Common Stock | 4,970 footnote F2 | $0.00 | - | ||
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| Judson Gray Teekell - Director | Grant or award | Common Stock | 2,267 footnote F1 | $0.00 | - | |
| Judson Gray Teekell - Director | Grant or award | Common Stock | 4,970 footnote F2 | $0.00 | - | |
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| Kurt M. Eckert - Director | Grant or award | Common Stock | 2,267 footnote F1 | $0.00 | - | |
| Kurt M. Eckert - Director | Grant or award | Common Stock | 4,970 footnote F2 | $0.00 | - | |
| Kurt M. Eckert - Director | Grant or award | Nonqualified Stock Option (Right to Buy) | 7,713 | $0.00 | - | |
| ||||||
| Shelly Brown - Officer | Open-market sale | Common Stock | 4,714 | $44.23 footnote F2 | $209K | |
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| Eric Sites - Director | Grant or award | Common Stock | 4,970 | $0.00 | - | |
| Eric Sites - Director | Grant or award | Common Stock | 714 | $0.00 | - | |
| Shelly Brown - Officer | Tax withholding / forfeiture | Common Stock | 3,619 | $40.79 | $148K | |
| Edward Deitzel - Officer | Tax withholding / forfeiture | Common Stock | 5,939 | $40.79 | $242K | |
| Douglas M. Schafer Jr. - Officer | Tax withholding / forfeiture | Common Stock | 32,565 | $40.79 | $1.33M | |
| Option exercise | Common Stock | 19,500 | $12.00 | $234K | ||
| Open-market sale | Common Stock | 19,500 | $41.73 footnote F2 | $814K | ||
| Option exercise | Stock Option (Right to Buy) | 19,500 | $0.00 | - | ||
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Recent MIAX Form 144 notices of proposed sale
3An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| DOUGLAS M. SCHAFER JR. | Officer | 120,000 | $4.05M | View on EDGAR | |
| SHELLY BROWN | Officer | 21,217 |
Stock trades in MIAX disclosed by members of the U.S. House in the last 12 months, newest first. Values are the ranges as filed.
| Member | Type | Traded | Disclosed | Value range | Owner | Days to disclose | Filing |
|---|---|---|---|---|---|---|---|
| Purchase |
MIAX insider trading FAQ
What is the latest insider trade for MIAX?
MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) had 20 insider filings in the last 90 days, with the most recent on 2026-10-06. The full record for MIAX runs to 144 Form 4 filings, the earliest from 2025-08-13. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying MIAX stock?
No insider purchases of MIAX were filed in the last 90 days. 17 purchases are on record for this company.
How many insiders are selling MIAX stock?
18 insider sales of MIAX were filed in the last 90 days, totaling $24.62M.
Where can I see MIAX SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects MIAX Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Financials companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Douglas M. Schafer Jr. view on EDGAR
- - Harish Jayabalan view on EDGAR
- - Shelly Brown view on EDGAR
- - Shelly Brown view on EDGAR
- - Thomas P. Gallagher view on EDGAR
- - Barbara J. Comly view on EDGAR
- - Edward Deitzel view on EDGAR
- - Douglas M. Schafer Jr. view on EDGAR
- - Judson Gray Teekell view on EDGAR
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Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Financials
- Where MIAX's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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