Miami International Holdings, Inc. (MIAX)
Miami International Holdings, Inc. (MIAX) Insider Trading
Directors, officers and holders of more than 10% of MIAX report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 644 transactions on file: 0 with code P, 16 with code S and 34 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 22, 2026 | Schafer Douglas M. JR | EVP and CIO | S Sale | 8,000 | $35.06 | $280,480 |
| Oct 22, 2026 | Comly Barbara J. | EVP, GC & Corporate Secretary | M Exercise | 12,306 | Not measured | Not measured |
| Oct 22, 2026 | Schafer Douglas M. JR | EVP and CIO | M Exercise | 8,000 | $12.00 | $96,000 |
| Oct 22, 2026 | Schafer Douglas M. JR | EVP and CIO | M Exercise | 8,000 | Not measured | Not measured |
| Oct 22, 2026 | Comly Barbara J. | EVP, GC & Corporate Secretary | S Sale | 12,306 | $35.04 | $431,202 |
| Oct 22, 2026 | Comly Barbara J. | EVP, GC & Corporate Secretary | M Exercise | 12,306 | $12.00 | $147,672 |
| Oct 2, 2026 | Schafer Douglas M. JR | EVP and CIO | S Sale | 40,000 | $33.34 | $1,333,600 |
| Oct 2, 2026 | Schafer Douglas M. JR | EVP and CIO | M Exercise | 40,000 | Not measured | Not measured |
| Oct 2, 2026 | Schafer Douglas M. JR | EVP and CIO | M Exercise | 40,000 | $12.00 | $480,000 |
| Sep 25, 2026 | Jayabalan Harish | EVP, CISO and CRO | M Exercise | 8,333 | $12.00 | $99,996 |
| Sep 25, 2026 | Jayabalan Harish | EVP, CISO and CRO | M Exercise | 8,333 | Not measured | Not measured |
| Sep 16, 2026 | Brown Shelly | EVP, Chief Strategy Officer | S Sale | 21,217 | $38.61 | $819,188 |
| Sep 11, 2026 | Brown Shelly | EVP, Chief Strategy Officer | F Tax Payment | 16,283 | $42.54 | $692,679 |
| Sep 3, 2026 | Gallagher Thomas P. | Chairman & CEO | S Sale | 47,000 | $42.43 | $1,994,210 |
| Sep 3, 2026 | Gallagher Thomas P. | Chairman & CEO | M Exercise | 8,333 | $12.00 | $99,996 |
| Sep 3, 2026 | Gallagher Thomas P. | Chairman & CEO | M Exercise | 13,140 | $15.22 | $199,991 |
| Sep 3, 2026 | Gallagher Thomas P. | Chairman & CEO | M Exercise | 13,140 | Not measured | Not measured |
| Sep 3, 2026 | Gallagher Thomas P. | Chairman & CEO | M Exercise | 47,000 | Not measured | Not measured |
| Sep 3, 2026 | Gallagher Thomas P. | Chairman & CEO | M Exercise | 16,666 | $12.00 | $199,992 |
| Sep 3, 2026 | Gallagher Thomas P. | Chairman & CEO | M Exercise | 4,464 | Not measured | Not measured |
| Sep 3, 2026 | Gallagher Thomas P. | Chairman & CEO | M Exercise | 47,000 | $12.00 | $564,000 |
| Sep 3, 2026 | Gallagher Thomas P. | Chairman & CEO | M Exercise | 4,464 | $22.40 | $99,994 |
| Sep 3, 2026 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | M Exercise | 11,000 | Not measured | Not measured |
| Sep 3, 2026 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | M Exercise | 11,000 | $12.00 | $132,000 |
| Sep 3, 2026 | Gallagher Thomas P. | Chairman & CEO | M Exercise | 16,666 | Not measured | Not measured |
| Sep 3, 2026 | Gallagher Thomas P. | Chairman & CEO | M Exercise | 8,333 | Not measured | Not measured |
| Sep 3, 2026 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | S Sale | 11,000 | $42.21 | $464,310 |
| Sep 2, 2026 | Comly Barbara J. | EVP, GC & Corporate Secretary | M Exercise | 44,445 | Not measured | Not measured |
| Sep 2, 2026 | Comly Barbara J. | EVP, GC & Corporate Secretary | S Sale | 44,445 | $40.49 | $1,799,578 |
| Sep 2, 2026 | Teekell Judson Gray | Director | S Sale | 5,545 | $41.58 | $230,561 |
| Sep 2, 2026 | Teekell Judson Gray | Director | S Sale | 3,000 | $40.89 | $122,670 |
| Sep 2, 2026 | Schafer Douglas M. JR | EVP and CIO | M Exercise | 43,334 | Not measured | Not measured |
| Sep 2, 2026 | Schafer Douglas M. JR | EVP and CIO | M Exercise | 4,666 | Not measured | Not measured |
| Sep 2, 2026 | Schafer Douglas M. JR | EVP and CIO | M Exercise | 4,666 | $12.00 | $55,992 |
| Sep 2, 2026 | Schafer Douglas M. JR | EVP and CIO | M Exercise | 43,334 | $12.00 | $520,008 |
| Sep 2, 2026 | Schafer Douglas M. JR | EVP and CIO | S Sale | 48,000 | $40.48 | $1,943,040 |
| Sep 2, 2026 | Comly Barbara J. | EVP, GC & Corporate Secretary | M Exercise | 44,445 | $12.00 | $533,340 |
| Aug 19, 2026 | Gallagher Thomas P. | Chairman & CEO | S Sale | 149,700 | $41.13 | $6,157,161 |
| Aug 18, 2026 | Comly Barbara J. | EVP, GC & Corporate Secretary | F Tax Payment | 43,420 | $42.41 | $1,841,442 |
| Aug 18, 2026 | Gallagher Thomas P. | Chairman & CEO | F Tax Payment | 150,300 | $42.41 | $6,374,223 |
| Aug 17, 2026 | Schwarzkopf Cynthia | Director | M Exercise | 5,000 | $12.00 | $60,000 |
| Aug 17, 2026 | Schwarzkopf Cynthia | Director | S Sale | 5,000 | $42.85 | $214,250 |
| Aug 17, 2026 | Emmons Lance | EVP and CFO | S Sale | 35,000 | $42.83 | $1,499,050 |
| Aug 17, 2026 | Schwarzkopf Cynthia | Director | M Exercise | 5,000 | Not measured | Not measured |
| Aug 4, 2026 | Schafer Douglas M. JR | EVP and CIO | M Exercise | 48,000 | $12.00 | $576,000 |
| Aug 4, 2026 | Comly Barbara J. | EVP, GC & Corporate Secretary | S Sale | 44,445 | $45.69 | $2,030,692 |
| Aug 4, 2026 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | M Exercise | 11,000 | $12.00 | $132,000 |
| Aug 4, 2026 | Schafer Douglas M. JR | EVP and CIO | S Sale | 48,000 | $45.71 | $2,194,080 |
| Aug 4, 2026 | Eckert Kurt M. | Director | M Exercise | 1,063 | $12.00 | $12,756 |
| Aug 4, 2026 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | S Sale | 11,000 | $45.78 | $503,580 |
The full Form 4 history is on the MIAX company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.