MIAX insider trading — Miami International Holdings, Inc.
No open-market insider purchases or sales were filed for Miami International Holdings, Inc. (MIAX) in the last 90 days. Other insider transactions — such as stock awards, option exercises or tax withholding — are listed below.
Updated Oct 16, 2026.
Recent MIAX insider transactions
Every Form 4 filed by Miami International Holdings, Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Oct 2, 2026 | Schafer Douglas M. Jr | EVP and CIO | M · Option exercise · 10b5-1 | Direct | 40,000 | $12.00 | $480K | Form 4 |
| Oct 2, 2026 | Schafer Douglas M. Jr | EVP and CIO | S · Sale · 10b5-1 | Direct | 40,000 | $33.34 | $1.33M | Form 4 |
| Sep 25, 2026 | Jayabalan Harish | EVP, CISO and CRO | M · Option exercise | Direct | 8,333 | $12.00 | $100K | Form 4 |
| Sep 16, 2026 | Brown Shelly | EVP, Chief Strategy Officer | S · Sale · 10b5-1 | Direct | 21,217 | $38.61 | $819K | Form 4 |
| Sep 11, 2026 | Brown Shelly | EVP, Chief Strategy Officer | F · Tax withholding | Direct | 16,283 | $42.54 | $693K | Form 4 |
| Sep 3, 2026 | Gallagher Thomas P. | Chairman & CEO | M · Option exercise · 10b5-1 | Indirect | 47,000 | $12.00 | $564K | Form 4 |
| Sep 3, 2026 | Gallagher Thomas P. | Chairman & CEO | S · Sale · 10b5-1 | Indirect | 47,000 | $42.43 | $1.99M | Form 4 |
| Sep 3, 2026 | Gallagher Thomas P. | Chairman & CEO | M · Option exercise · 10b5-1 | Direct | 42,603 | $14.08 | $600K | Form 4 |
| Sep 2, 2026 | Comly Barbara J. | EVP, GC & Corporate Secretary | M · Option exercise · 10b5-1 | Direct | 44,445 | $12.00 | $533K | Form 4 |
| Sep 2, 2026 | Comly Barbara J. | EVP, GC & Corporate Secretary | S · Sale · 10b5-1 | Direct | 44,445 | $40.49 | $1.80M | Form 4 |
| Sep 3, 2026 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | M · Option exercise · 10b5-1 | Direct | 11,000 | $12.00 | $132K | Form 4 |
| Sep 3, 2026 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | S · Sale · 10b5-1 | Direct | 11,000 | $42.21 | $464K | Form 4 |
| Sep 2, 2026 | Schafer Douglas M. Jr | EVP and CIO | M · Option exercise · 10b5-1 | Direct | 48,000 | $12.00 | $576K | Form 4 |
| Sep 2, 2026 | Schafer Douglas M. Jr | EVP and CIO | S · Sale · 10b5-1 | Direct | 48,000 | $40.48 | $1.94M | Form 4 |
| Sep 2, 2026 | Teekell Judson Gray | Director | S · Sale · 10b5-1 | Indirect | 5,545 | $41.58 | $231K | Form 4 |
| Sep 2, 2026 | Teekell Judson Gray | Director | S · Sale · 10b5-1 | Direct | 3,000 | $40.89 | $123K | Form 4 |
| Aug 19, 2026 | Gallagher Thomas P. | Chairman & CEO | S · Sale · 10b5-1 | Indirect | 149,700 | $41.13 | $6.16M | Form 4 |
| Aug 18, 2026 | Gallagher Thomas P. | Chairman & CEO | F · Tax withholding · 10b5-1 | Indirect | 150,300 | $42.41 | $6.37M | Form 4 |
| Aug 18, 2026 | Comly Barbara J. | EVP, GC & Corporate Secretary | F · Tax withholding | Direct | 43,420 | $42.41 | $1.84M | Form 4 |
| Aug 17, 2026 | Schwarzkopf Cynthia | Director | M · Option exercise · 10b5-1 | Direct | 5,000 | $12.00 | $60K | Form 4 |
| Aug 17, 2026 | Schwarzkopf Cynthia | Director | S · Sale · 10b5-1 | Direct | 5,000 | $42.85 | $214K | Form 4 |
| Aug 17, 2026 | Emmons Lance | EVP and CFO | S · Sale · 10b5-1 | Direct | 35,000 | $42.83 | $1.50M | Form 4 |
| Aug 4, 2026 | Eckert Kurt M. | Director | M · Option exercise · 10b5-1 | Direct | 1,063 | $12.00 | $13K | Form 4 |
| Aug 4, 2026 | Eckert Kurt M. | Director | S · Sale · 10b5-1 | Direct | 1,063 | $45.80 | $49K | Form 4 |
| Aug 4, 2026 | Teekell Judson Gray | Director | S · Sale · 10b5-1 | Direct | 3,000 | $45.79 | $137K | Form 4 |
| Aug 4, 2026 | Jayabalan Harish | EVP, CISO and CRO | M · Option exercise · 10b5-1 | Direct | 20,000 | $12.94 | $259K | Form 4 |
| Aug 4, 2026 | Jayabalan Harish | EVP, CISO and CRO | S · Sale · 10b5-1 | Direct | 20,000 | $45.90 | $918K | Form 4 |
| Aug 4, 2026 | Comly Barbara J. | EVP, GC & Corporate Secretary | M · Option exercise · 10b5-1 | Direct | 44,445 | $12.00 | $533K | Form 4 |
| Aug 4, 2026 | Comly Barbara J. | EVP, GC & Corporate Secretary | S · Sale · 10b5-1 | Direct | 44,445 | $45.69 | $2.03M | Form 4 |
| Aug 4, 2026 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | M · Option exercise · 10b5-1 | Direct | 11,000 | $12.00 | $132K | Form 4 |
| Aug 4, 2026 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | S · Sale · 10b5-1 | Direct | 11,000 | $45.78 | $504K | Form 4 |
| Aug 4, 2026 | Schafer Douglas M. Jr | EVP and CIO | M · Option exercise · 10b5-1 | Direct | 48,000 | $12.00 | $576K | Form 4 |
| Aug 4, 2026 | Schafer Douglas M. Jr | EVP and CIO | S · Sale · 10b5-1 | Direct | 48,000 | $45.71 | $2.19M | Form 4 |
| Aug 4, 2026 | Gallagher Thomas P. | Chairman & CEO | M · Option exercise · 10b5-1 | Indirect | 48,334 | $12.00 | $580K | Form 4 |
| Aug 4, 2026 | Gallagher Thomas P. | Chairman & CEO | S · Sale · 10b5-1 | Indirect | 48,334 | $45.69 | $2.21M | Form 4 |
MIAX insider trading FAQ
Are insiders buying MIAX stock?
Not on the open market. In the last 90 days, Miami International Holdings, Inc. insiders made no open-market purchases, and no open-market sales. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading MIAX?
No insider bought or sold on the open market in the last 90 days.
Where does MIAX insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.