Company / CIK 0001438472
MIAMI INTERNATIONAL HOLDINGS, INC.
- Ticker
- MIAX
- Insiders on file
- 25
- Members of Congress who traded it
- 1
- Federal contracts on record
- none matched
- Lobbying filings on record
- none matched
- SEC filings
- EDGAR ↗
- Latest trade on record
- October 22, 2026
MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) has 25 insiders on file who disclosed 319 transactions in the last 12 months (3 open-market buys, 88 sales, about $125.8M at reported prices), and 1 congressional trade in its stock is on record. No federal contract award that started in the last 180 days was found for a recipient with exactly this name; no lobbying filing names it as client this year.
MIAMI INTERNATIONAL HOLDINGS, INC. in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
BoughtSold
8 people account for the disclosed buying and selling in MIAMI INTERNATIONAL HOLDINGS, INC. over the last 12 months; the most active is Gallagher Thomas P. with $42M.
Insiders
| Name | Role | Rows | Bought | Sold | Last filed |
|---|---|---|---|---|---|
| Schafer Douglas M. JR | EVP and CIO | 34 | 0 | 11 | October 26, 2026 |
| Comly Barbara J. | EVP, GC & Corporate Secretary | 35 | 0 | 10 | October 26, 2026 |
| Jayabalan Harish | EVP, CISO and CRO | 23 | 0 | 4 | September 29, 2026 |
| Brown Shelly | EVP, Chief Strategy Officer | 40 | 0 | 13 | September 17, 2026 |
| Gallagher Thomas P. | Chairman & CEO | 47 | 0 | 15 | September 4, 2026 |
| Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | 32 | 0 | 11 | September 4, 2026 |
| Teekell Judson Gray | Director | 13 | 0 | 9 | September 4, 2026 |
| Emmons Lance | EVP and CFO | 12 | 0 | 3 | August 19, 2026 |
| Schwarzkopf Cynthia | Director | 12 | 0 | 3 | August 19, 2026 |
| Eckert Kurt M. | Director | 18 | 0 | 5 | August 6, 2026 |
| BROWN DAVID A | Director | 4 | 0 | 1 | July 9, 2026 |
| Smollen John | EVP, New Product Development | 4 | 0 | 1 | June 18, 2026 |
| Vermaas Cees | CEO of TISEG | 2 | 0 | 0 | June 18, 2026 |
| Beckelman John | Director | 4 | 0 | 0 | June 17, 2026 |
| Stahlin Paul | Director | 7 | 0 | 1 | June 17, 2026 |
| Sites Eric | Director | 2 | 0 | 0 | June 17, 2026 |
| Raymond Mark F. | Director | 4 | 0 | 0 | June 17, 2026 |
| Moore Lisa | Director | 2 | 0 | 0 | June 17, 2026 |
| Massad Mark I. | Director | 2 | 0 | 0 | June 17, 2026 |
| Becker Lee | Director | 1 | 0 | 0 | June 17, 2026 |
| Sommers Jill E. | Director | 3 | 0 | 0 | June 17, 2026 |
| Lozier Kenneth W. | Director | 3 | 0 | 0 | June 17, 2026 |
| Al-Bahar Talal Jassim | Director | 2 | 0 | 0 | June 17, 2026 |
| HORIZON KINETICS ASSET MANAGEMENT LLC | Insider | 1 | 0 | 0 | May 21, 2026 |
| STAHL MURRAY | Director | 13 | 4 | 1 | March 6, 2026 |
Rows are this company's Form 4 rows for each person. "Bought" and "sold" count open-market purchases (code P) and sales only. More in insider buying and insider selling.
Members of Congress who traded MIAX
From periodic transaction reports that name the company's stock. Amounts are the sums of the ranges as filed. Every row is on the MIAX page.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| Gilbert Ray Cisneros, Jr. | Representative (CA, District 31), Democrat | 1 | 1 | 0 | $15K–$50K | March 20, 2026 |
Insider transactions
| Filer | Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Schafer Douglas M. JR | MIAX | Option / conversion M | October 22, 2026 | October 26, 2026 | 4d | 8,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Sell S | October 22, 2026 | October 26, 2026 | 4d | 8,000 | $35 | $280K | 10b5-1 plan | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Option / conversion M | October 22, 2026 | October 26, 2026 | 4d | 8,000 | $12 | $96K | 10b5-1 plan | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Option / conversion M | October 22, 2026 | October 26, 2026 | 4d | 12,306 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Sell S | October 22, 2026 | October 26, 2026 | 4d | 12,306 | $35 | $431K | 10b5-1 plan | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Option / conversion M | October 22, 2026 | October 26, 2026 | 4d | 12,306 | $12 | $148K | 10b5-1 plan | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Option / conversion M | October 2, 2026 | October 6, 2026 | 4d | 40,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Sell S | October 2, 2026 | October 6, 2026 | 4d | 40,000 | $33 | $1.3M | 10b5-1 plan | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Option / conversion M | October 2, 2026 | October 6, 2026 | 4d | 40,000 | $12 | $480K | 10b5-1 plan | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Option / conversion M | September 25, 2026 | September 29, 2026 | 4d | 8,333 | — | — | derivative | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Option / conversion M | September 25, 2026 | September 29, 2026 | 4d | 8,333 | $12 | $100K | Form 4 ↗ | ||
| Brown Shelly | MIAX | Sell S | September 16, 2026 | September 17, 2026 | 1d | 21,217 | $39 | $819K | 10b5-1 plan | Form 4 ↗ | |
| Brown Shelly | MIAX | Sell F | September 11, 2026 | September 11, 2026 | 0d | 16,283 | $43 | $693K | Form 4 ↗ | ||
| Gallagher Thomas P. | MIAX | Option / conversion M | September 3, 2026 | September 4, 2026 | 1d | 4,464 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Option / conversion M | September 3, 2026 | September 4, 2026 | 1d | 13,140 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Option / conversion M | September 3, 2026 | September 4, 2026 | 1d | 8,333 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Option / conversion M | September 3, 2026 | September 4, 2026 | 1d | 16,666 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Option / conversion M | September 3, 2026 | September 4, 2026 | 1d | 47,000 | — | — | 10b5-1 planindirectderivative | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Option / conversion M | September 3, 2026 | September 4, 2026 | 1d | 4,464 | $22 | $100K | 10b5-1 plan | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Option / conversion M | September 3, 2026 | September 4, 2026 | 1d | 13,140 | $15 | $200K | 10b5-1 plan | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Option / conversion M | September 3, 2026 | September 4, 2026 | 1d | 8,333 | $12 | $100K | 10b5-1 plan | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Option / conversion M | September 3, 2026 | September 4, 2026 | 1d | 16,666 | $12 | $200K | 10b5-1 plan | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Sell S | September 3, 2026 | September 4, 2026 | 1d | 47,000 | $42 | $2.0M | 10b5-1 planindirect | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Option / conversion M | September 3, 2026 | September 4, 2026 | 1d | 47,000 | $12 | $564K | 10b5-1 planindirect | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Option / conversion M | September 2, 2026 | September 4, 2026 | 2d | 44,445 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Sell S | September 2, 2026 | September 4, 2026 | 2d | 44,445 | $40 | $1.8M | 10b5-1 plan | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Option / conversion M | September 2, 2026 | September 4, 2026 | 2d | 44,445 | $12 | $533K | 10b5-1 plan | Form 4 ↗ | |
| Deitzel Edward | MIAX | Option / conversion M | September 3, 2026 | September 4, 2026 | 1d | 11,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Deitzel Edward | MIAX | Sell S | September 3, 2026 | September 4, 2026 | 1d | 11,000 | $42 | $464K | 10b5-1 plan | Form 4 ↗ | |
| Deitzel Edward | MIAX | Option / conversion M | September 3, 2026 | September 4, 2026 | 1d | 11,000 | $12 | $132K | 10b5-1 plan | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Option / conversion M | September 2, 2026 | September 4, 2026 | 2d | 4,666 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Option / conversion M | September 2, 2026 | September 4, 2026 | 2d | 43,334 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Sell S | September 2, 2026 | September 4, 2026 | 2d | 48,000 | $40 | $1.9M | 10b5-1 plan | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Option / conversion M | September 2, 2026 | September 4, 2026 | 2d | 4,666 | $12 | $56K | 10b5-1 plan | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Option / conversion M | September 2, 2026 | September 4, 2026 | 2d | 43,334 | $12 | $520K | 10b5-1 plan | Form 4 ↗ | |
| Teekell Judson Gray | MIAX | Sell S | September 2, 2026 | September 4, 2026 | 2d | 3,000 | $41 | $123K | 10b5-1 plan | Form 4 ↗ | |
| Teekell Judson Gray | MIAX | Sell S | September 2, 2026 | September 4, 2026 | 2d | 5,545 | $42 | $231K | 10b5-1 planindirect | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Sell S | August 19, 2026 | August 20, 2026 | 1d | 149,700 | $41 | $6.2M | 10b5-1 planindirect | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Sell F | August 18, 2026 | August 20, 2026 | 2d | 150,300 | $42 | $6.4M | 10b5-1 planindirect | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Sell F | August 18, 2026 | August 20, 2026 | 2d | 43,420 | $42 | $1.8M | Form 4 ↗ | ||
| Schwarzkopf Cynthia | MIAX | Option / conversion M | August 17, 2026 | August 19, 2026 | 2d | 5,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Schwarzkopf Cynthia | MIAX | Sell S | August 17, 2026 | August 19, 2026 | 2d | 5,000 | $43 | $214K | 10b5-1 plan | Form 4 ↗ | |
| Schwarzkopf Cynthia | MIAX | Option / conversion M | August 17, 2026 | August 19, 2026 | 2d | 5,000 | $12 | $60K | 10b5-1 plan | Form 4 ↗ | |
| Emmons Lance | MIAX | Sell S | August 17, 2026 | August 19, 2026 | 2d | 35,000 | $43 | $1.5M | 10b5-1 plan | Form 4 ↗ | |
| Eckert Kurt M. | MIAX | Option / conversion M | August 4, 2026 | August 6, 2026 | 2d | 1,063 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Eckert Kurt M. | MIAX | Sell S | August 4, 2026 | August 6, 2026 | 2d | 1,063 | $46 | $49K | 10b5-1 plan | Form 4 ↗ | |
| Eckert Kurt M. | MIAX | Option / conversion M | August 4, 2026 | August 6, 2026 | 2d | 1,063 | $12 | $13K | 10b5-1 plan | Form 4 ↗ | |
| Teekell Judson Gray | MIAX | Sell S | August 4, 2026 | August 6, 2026 | 2d | 3,000 | $46 | $137K | 10b5-1 plan | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Option / conversion M | August 4, 2026 | August 6, 2026 | 2d | 5,832 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Option / conversion M | August 4, 2026 | August 6, 2026 | 2d | 14,168 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Sell S | August 4, 2026 | August 6, 2026 | 2d | 20,000 | $46 | $918K | 10b5-1 plan | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Option / conversion M | August 4, 2026 | August 6, 2026 | 2d | 5,832 | $15 | $89K | 10b5-1 plan | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Option / conversion M | August 4, 2026 | August 6, 2026 | 2d | 14,168 | $12 | $170K | 10b5-1 plan | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Option / conversion M | August 4, 2026 | August 6, 2026 | 2d | 44,445 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Sell S | August 4, 2026 | August 6, 2026 | 2d | 44,445 | $46 | $2.0M | 10b5-1 plan | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Option / conversion M | August 4, 2026 | August 6, 2026 | 2d | 44,445 | $12 | $533K | 10b5-1 plan | Form 4 ↗ | |
| Deitzel Edward | MIAX | Option / conversion M | August 4, 2026 | August 6, 2026 | 2d | 11,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Deitzel Edward | MIAX | Sell S | August 4, 2026 | August 6, 2026 | 2d | 11,000 | $46 | $504K | 10b5-1 plan | Form 4 ↗ | |
| Deitzel Edward | MIAX | Option / conversion M | August 4, 2026 | August 6, 2026 | 2d | 11,000 | $12 | $132K | 10b5-1 plan | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Option / conversion M | August 4, 2026 | August 6, 2026 | 2d | 48,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Sell S | August 4, 2026 | August 6, 2026 | 2d | 48,000 | $46 | $2.2M | 10b5-1 plan | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Option / conversion M | August 4, 2026 | August 6, 2026 | 2d | 48,000 | $12 | $576K | 10b5-1 plan | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Option / conversion M | August 4, 2026 | August 6, 2026 | 2d | 48,334 | — | — | 10b5-1 planindirectderivative | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Sell S | August 4, 2026 | August 6, 2026 | 2d | 48,334 | $46 | $2.2M | 10b5-1 planindirect | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Option / conversion M | August 4, 2026 | August 6, 2026 | 2d | 48,334 | $12 | $580K | 10b5-1 planindirect | Form 4 ↗ | |
| Schwarzkopf Cynthia | MIAX | Option / conversion M | July 15, 2026 | July 16, 2026 | 1d | 5,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Schwarzkopf Cynthia | MIAX | Sell S | July 15, 2026 | July 16, 2026 | 1d | 5,000 | $42 | $210K | 10b5-1 plan | Form 4 ↗ | |
| Schwarzkopf Cynthia | MIAX | Option / conversion M | July 15, 2026 | July 16, 2026 | 1d | 5,000 | $12 | $60K | 10b5-1 plan | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Option / conversion M | July 13, 2026 | July 14, 2026 | 1d | 28,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Sell S | July 13, 2026 | July 14, 2026 | 1d | 28,000 | $42 | $1.2M | 10b5-1 plan | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Option / conversion M | July 13, 2026 | July 14, 2026 | 1d | 28,000 | $12 | $336K | 10b5-1 plan | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Option / conversion M | July 13, 2026 | July 14, 2026 | 1d | 70,000 | — | — | 10b5-1 planindirectderivative | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Sell S | July 13, 2026 | July 14, 2026 | 1d | 70,000 | $43 | $3.0M | 10b5-1 planindirect | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Option / conversion M | July 13, 2026 | July 14, 2026 | 1d | 70,000 | $12 | $840K | 10b5-1 planindirect | Form 4 ↗ | |
| BROWN DAVID A | MIAX | Sell F | July 8, 2026 | July 9, 2026 | 1d | 171 | $44 | $7,476 | Form 4 ↗ | ||
| Gallagher Thomas P. | MIAX | Option / conversion M | July 7, 2026 | July 7, 2026 | 0d | 28,228 | — | — | 10b5-1 planindirectderivative | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Option / conversion M | July 6, 2026 | July 7, 2026 | 1d | 41,772 | — | — | 10b5-1 planindirectderivative | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Sell S | July 7, 2026 | July 7, 2026 | 0d | 28,228 | $42 | $1.2M | 10b5-1 planindirect | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Option / conversion M | July 7, 2026 | July 7, 2026 | 0d | 28,228 | $12 | $339K | 10b5-1 planindirect | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Sell S | July 6, 2026 | July 7, 2026 | 1d | 41,772 | $42 | $1.8M | 10b5-1 planindirect | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Option / conversion M | July 6, 2026 | July 7, 2026 | 1d | 41,772 | $12 | $501K | 10b5-1 planindirect | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Option / conversion M | July 6, 2026 | July 7, 2026 | 1d | 2,499 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Option / conversion M | July 6, 2026 | July 7, 2026 | 1d | 16,667 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Option / conversion M | July 6, 2026 | July 7, 2026 | 1d | 834 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Sell S | July 6, 2026 | July 7, 2026 | 1d | 20,000 | $42 | $842K | 10b5-1 plan | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Option / conversion M | July 6, 2026 | July 7, 2026 | 1d | 2,499 | $12 | $30K | 10b5-1 plan | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Option / conversion M | July 6, 2026 | July 7, 2026 | 1d | 16,667 | $12 | $200K | 10b5-1 plan | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Option / conversion M | July 6, 2026 | July 7, 2026 | 1d | 834 | $12 | $10K | 10b5-1 plan | Form 4 ↗ | |
| Deitzel Edward | MIAX | Option / conversion M | July 6, 2026 | July 7, 2026 | 1d | 3,667 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Deitzel Edward | MIAX | Option / conversion M | July 6, 2026 | July 7, 2026 | 1d | 7,333 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Deitzel Edward | MIAX | Sell S | July 6, 2026 | July 7, 2026 | 1d | 11,000 | $42 | $462K | 10b5-1 plan | Form 4 ↗ | |
| Deitzel Edward | MIAX | Option / conversion M | July 6, 2026 | July 7, 2026 | 1d | 3,667 | $12 | $44K | 10b5-1 plan | Form 4 ↗ | |
| Deitzel Edward | MIAX | Option / conversion M | July 6, 2026 | July 7, 2026 | 1d | 7,333 | $12 | $88K | 10b5-1 plan | Form 4 ↗ | |
| Brown Shelly | MIAX | Option / conversion M | July 6, 2026 | July 7, 2026 | 1d | 16,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Brown Shelly | MIAX | Sell S | July 6, 2026 | July 7, 2026 | 1d | 16,000 | $42 | $674K | 10b5-1 plan | Form 4 ↗ | |
| Brown Shelly | MIAX | Option / conversion M | July 6, 2026 | July 7, 2026 | 1d | 16,000 | $12 | $192K | 10b5-1 plan | Form 4 ↗ | |
| Teekell Judson Gray | MIAX | Sell S | July 2, 2026 | July 7, 2026 | 5d | 3,000 | $40 | $120K | late10b5-1 plan | Form 4 ↗ | |
| Eckert Kurt M. | MIAX | Option / conversion M | July 2, 2026 | July 7, 2026 | 5d | 5,250 | — | — | late10b5-1 planderivative | Form 4 ↗ | |
| Eckert Kurt M. | MIAX | Sell S | July 2, 2026 | July 7, 2026 | 5d | 5,250 | $39 | $207K | late10b5-1 plan | Form 4 ↗ | |
| Eckert Kurt M. | MIAX | Option / conversion M | July 2, 2026 | July 7, 2026 | 5d | 5,250 | $12 | $63K | late10b5-1 plan | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Option / conversion M | July 2, 2026 | July 7, 2026 | 5d | 28,000 | — | — | late10b5-1 planderivative | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Sell S | July 2, 2026 | July 7, 2026 | 5d | 28,000 | $41 | $1.2M | late10b5-1 plan | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Option / conversion M | July 2, 2026 | July 7, 2026 | 5d | 28,000 | $12 | $336K | late10b5-1 plan | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Option / conversion M | July 2, 2026 | July 7, 2026 | 5d | 42,000 | — | — | late10b5-1 planderivative | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Option / conversion M | July 2, 2026 | July 7, 2026 | 5d | 6,000 | — | — | late10b5-1 planderivative | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Sell S | July 2, 2026 | July 7, 2026 | 5d | 48,000 | $41 | $2.0M | late10b5-1 plan | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Option / conversion M | July 2, 2026 | July 7, 2026 | 5d | 42,000 | $12 | $504K | late10b5-1 plan | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Option / conversion M | July 2, 2026 | July 7, 2026 | 5d | 6,000 | $12 | $72K | late10b5-1 plan | Form 4 ↗ | |
| Vermaas Cees | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 4,793 | — | — | derivative | Form 4 ↗ | |
| Vermaas Cees | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 4,660 | — | — | Form 4 ↗ | ||
| Jayabalan Harish | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 34,808 | — | — | derivative | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 2,485 | — | — | derivative | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 4,660 | — | — | Form 4 ↗ | ||
| Deitzel Edward | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 7,101 | — | — | derivative | Form 4 ↗ | |
| Deitzel Edward | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 2,485 | — | — | derivative | Form 4 ↗ | |
| Deitzel Edward | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 9,319 | — | — | Form 4 ↗ | ||
| Smollen John | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 5,184 | — | — | derivative | Form 4 ↗ | |
| Smollen John | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 2,485 | — | — | derivative | Form 4 ↗ | |
| Smollen John | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 7,455 | — | — | Form 4 ↗ | ||
| Schafer Douglas M. JR | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 21,481 | — | — | derivative | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 2,485 | — | — | derivative | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 23,298 | — | — | Form 4 ↗ | ||
| Emmons Lance | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 35,861 | — | — | derivative | Form 4 ↗ | |
| Emmons Lance | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 2,485 | — | — | derivative | Form 4 ↗ | |
| Emmons Lance | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 37,276 | — | — | Form 4 ↗ | ||
| Brown Shelly | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 35,861 | — | — | derivative | Form 4 ↗ | |
| Brown Shelly | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 2,485 | — | — | derivative | Form 4 ↗ | |
| Brown Shelly | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 37,276 | — | — | Form 4 ↗ | ||
| Comly Barbara J. | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 37,778 | — | — | derivative | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 2,485 | — | — | derivative | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 39,140 | — | — | Form 4 ↗ | ||
| Gallagher Thomas P. | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 237,175 | — | — | derivative | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 2,485 | — | — | derivative | Form 4 ↗ | |
| Gallagher Thomas P. | MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 232,977 | — | — | Form 4 ↗ | ||
| BROWN DAVID A | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 5,142 | — | — | derivative | Form 4 ↗ | |
| BROWN DAVID A | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 4,970 | — | — | Form 4 ↗ | ||
| BROWN DAVID A | MIAX | Other A | June 15, 2026 | June 17, 2026 | 2d | 2,267 | — | — | Form 4 ↗ | ||
| Al-Bahar Talal Jassim | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 4,970 | — | — | Form 4 ↗ | ||
| Al-Bahar Talal Jassim | MIAX | Other A | June 15, 2026 | June 17, 2026 | 2d | 2,267 | — | — | Form 4 ↗ | ||
| Lozier Kenneth W. | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 2,571 | — | — | derivative | Form 4 ↗ | |
| Lozier Kenneth W. | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 4,970 | — | — | Form 4 ↗ | ||
| Lozier Kenneth W. | MIAX | Other A | June 15, 2026 | June 17, 2026 | 2d | 2,267 | — | — | Form 4 ↗ | ||
| Sommers Jill E. | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 2,571 | — | — | derivative | Form 4 ↗ | |
| Sommers Jill E. | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 4,970 | — | — | Form 4 ↗ | ||
| Sommers Jill E. | MIAX | Other A | June 15, 2026 | June 17, 2026 | 2d | 1,113 | — | — | Form 4 ↗ | ||
| Schwarzkopf Cynthia | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 5,142 | — | — | derivative | Form 4 ↗ | |
| Schwarzkopf Cynthia | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 4,970 | — | — | Form 4 ↗ | ||
| Schwarzkopf Cynthia | MIAX | Other A | June 15, 2026 | June 17, 2026 | 2d | 2,267 | — | — | Form 4 ↗ | ||
| Becker Lee | MIAX | Other A | June 15, 2026 | June 17, 2026 | 2d | 2,267 | — | — | Form 4 ↗ | ||
| Massad Mark I. | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 4,970 | — | — | Form 4 ↗ | ||
| Massad Mark I. | MIAX | Other A | June 15, 2026 | June 17, 2026 | 2d | 2,267 | — | — | Form 4 ↗ | ||
| Moore Lisa | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 4,970 | — | — | Form 4 ↗ | ||
| Moore Lisa | MIAX | Other A | June 15, 2026 | June 17, 2026 | 2d | 2,267 | — | — | Form 4 ↗ | ||
| Raymond Mark F. | MIAX | Option / conversion M | June 16, 2026 | June 17, 2026 | 1d | 16,000 | — | — | derivative | Form 4 ↗ | |
| Raymond Mark F. | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 4,970 | — | — | Form 4 ↗ | ||
| Raymond Mark F. | MIAX | Option / conversion M | June 16, 2026 | June 17, 2026 | 1d | 16,000 | $12 | $192K | Form 4 ↗ | ||
| Raymond Mark F. | MIAX | Other A | June 15, 2026 | June 17, 2026 | 2d | 2,267 | — | — | Form 4 ↗ | ||
| Stahlin Paul | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 4,970 | — | — | Form 4 ↗ | ||
| Stahlin Paul | MIAX | Other A | June 15, 2026 | June 17, 2026 | 2d | 2,267 | — | — | Form 4 ↗ | ||
| Beckelman John | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 4,970 | — | — | Form 4 ↗ | ||
| Beckelman John | MIAX | Other A | June 15, 2026 | June 17, 2026 | 2d | 2,267 | — | — | Form 4 ↗ | ||
| Teekell Judson Gray | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 4,970 | — | — | Form 4 ↗ | ||
| Teekell Judson Gray | MIAX | Other A | June 15, 2026 | June 17, 2026 | 2d | 2,267 | — | — | Form 4 ↗ | ||
| Eckert Kurt M. | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 7,713 | — | — | derivative | Form 4 ↗ | |
| Eckert Kurt M. | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 4,970 | — | — | Form 4 ↗ | ||
| Eckert Kurt M. | MIAX | Other A | June 15, 2026 | June 17, 2026 | 2d | 2,267 | — | — | Form 4 ↗ | ||
| Brown Shelly | MIAX | Sell S | June 15, 2026 | June 17, 2026 | 2d | 4,714 | $44 | $209K | 10b5-1 plan | Form 4 ↗ | |
| Sites Eric | MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 4,970 | — | — | Form 4 ↗ | ||
| Sites Eric | MIAX | Other A | June 15, 2026 | June 17, 2026 | 2d | 714 | — | — | Form 4 ↗ | ||
| Brown Shelly | MIAX | Sell F | June 11, 2026 | June 12, 2026 | 1d | 3,619 | $41 | $148K | Form 4 ↗ | ||
| Deitzel Edward | MIAX | Sell F | June 11, 2026 | June 12, 2026 | 1d | 5,939 | $41 | $242K | Form 4 ↗ | ||
| Schafer Douglas M. JR | MIAX | Sell F | June 11, 2026 | June 12, 2026 | 1d | 32,565 | $41 | $1.3M | Form 4 ↗ | ||
| Schwarzkopf Cynthia | MIAX | Option / conversion M | June 11, 2026 | June 12, 2026 | 1d | 19,500 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Schwarzkopf Cynthia | MIAX | Sell S | June 11, 2026 | June 12, 2026 | 1d | 19,500 | $42 | $814K | 10b5-1 plan | Form 4 ↗ | |
| Schwarzkopf Cynthia | MIAX | Option / conversion M | June 11, 2026 | June 12, 2026 | 1d | 19,500 | $12 | $234K | 10b5-1 plan | Form 4 ↗ | |
| Stahlin Paul | MIAX | Option / conversion M | June 11, 2026 | June 11, 2026 | 0d | 4,000 | — | — | derivative | Form 4 ↗ | |
| Stahlin Paul | MIAX | Option / conversion M | June 9, 2026 | June 11, 2026 | 2d | 7,000 | — | — | derivative | Form 4 ↗ | |
| Stahlin Paul | MIAX | Sell F | June 11, 2026 | June 11, 2026 | 0d | 1,177 | $41 | $48K | Form 4 ↗ | ||
| Stahlin Paul | MIAX | Option / conversion M | June 11, 2026 | June 11, 2026 | 0d | 4,000 | $12 | $48K | Form 4 ↗ | ||
| Stahlin Paul | MIAX | Option / conversion M | June 9, 2026 | June 11, 2026 | 2d | 7,000 | $12 | $84K | Form 4 ↗ | ||
| Jayabalan Harish | MIAX | Option / conversion M | June 9, 2026 | June 10, 2026 | 1d | 9,783 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Option / conversion M | June 8, 2026 | June 10, 2026 | 2d | 10,217 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Sell S | June 9, 2026 | June 10, 2026 | 1d | 9,783 | $40 | $392K | 10b5-1 plan | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Option / conversion M | June 9, 2026 | June 10, 2026 | 1d | 9,783 | $12 | $117K | 10b5-1 plan | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Sell S | June 8, 2026 | June 10, 2026 | 2d | 10,217 | $40 | $410K | 10b5-1 plan | Form 4 ↗ | |
| Jayabalan Harish | MIAX | Option / conversion M | June 8, 2026 | June 10, 2026 | 2d | 10,217 | $12 | $123K | 10b5-1 plan | Form 4 ↗ | |
| Teekell Judson Gray | MIAX | Sell S | June 2, 2026 | June 4, 2026 | 2d | 3,000 | $43 | $128K | 10b5-1 plan | Form 4 ↗ | |
| Eckert Kurt M. | MIAX | Option / conversion M | June 2, 2026 | June 4, 2026 | 2d | 5,250 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Eckert Kurt M. | MIAX | Sell S | June 2, 2026 | June 4, 2026 | 2d | 5,250 | $43 | $224K | 10b5-1 plan | Form 4 ↗ | |
| Eckert Kurt M. | MIAX | Option / conversion M | June 2, 2026 | June 4, 2026 | 2d | 5,250 | $12 | $63K | 10b5-1 plan | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Option / conversion M | June 2, 2026 | June 4, 2026 | 2d | 28,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Sell S | June 2, 2026 | June 4, 2026 | 2d | 28,000 | $43 | $1.2M | 10b5-1 plan | Form 4 ↗ | |
| Comly Barbara J. | MIAX | Option / conversion M | June 2, 2026 | June 4, 2026 | 2d | 28,000 | $12 | $336K | 10b5-1 plan | Form 4 ↗ | |
| Deitzel Edward | MIAX | Option / conversion M | June 2, 2026 | June 4, 2026 | 2d | 11,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Deitzel Edward | MIAX | Sell S | June 2, 2026 | June 4, 2026 | 2d | 11,000 | $42 | $464K | 10b5-1 plan | Form 4 ↗ | |
| Deitzel Edward | MIAX | Option / conversion M | June 2, 2026 | June 4, 2026 | 2d | 11,000 | $12 | $132K | 10b5-1 plan | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Option / conversion M | June 2, 2026 | June 4, 2026 | 2d | 48,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Sell S | June 2, 2026 | June 4, 2026 | 2d | 48,000 | $43 | $2.1M | 10b5-1 plan | Form 4 ↗ | |
| Schafer Douglas M. JR | MIAX | Option / conversion M | June 2, 2026 | June 4, 2026 | 2d | 48,000 | $12 | $576K | 10b5-1 plan | Form 4 ↗ | |
| Brown Shelly | MIAX | Option / conversion M | June 2, 2026 | June 4, 2026 | 2d | 16,000 | — | — | 10b5-1 planderivative | Form 4 ↗ |
Showing the 200 most recent of 320.
Federal contracts (USAspending, awards started in the last 180 days)
No contract award starting in the last 180 days was found for a recipient named exactly "MIAMI INTERNATIONAL HOLDINGS, INC.". Subsidiaries and differently-spelled recipients are not matched — search contracts.
Lobbying (Senate LDA, as client)
No LDA filing posted since October 2025 names "MIAMI INTERNATIONAL HOLDINGS, INC." as the client. Filings under a subsidiary or trade-association name are not matched — search lobbying.
Related companies
Companies whose stock was traded by the same people who traded MIAX, by number of filers in common. It shows overlap in public filings and nothing else.
- CrowdStrike Holdings, Inc. CRWD 1 filer in common
- Cloudflare, Inc. NET 1 filer in common
- Uber Technologies, Inc UBER 1 filer in common
- Datadog, Inc. DDOG 1 filer in common
- CARVANA CO. CVNA 1 filer in common
- Arista Networks, Inc. ANET 1 filer in common
- Credo Technology Group Holding Ltd CRDO 1 filer in common
- AppLovin Corp APP 1 filer in common
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| House Clerk, periodic transaction reports | 1 | 1 | April 7, 2026 | April 7, 2026 | House Clerk search |
| SEC EDGAR, Form 4 | 114 | 320 | October 6, 2025 | October 26, 2026 | Form 4 list on EDGAR |
Site built October 27, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insiders and their transactions come from SEC EDGAR Form 4 filings for this issuer. Contracts and lobbying are matched by exact normalized name (suffixes like Inc./Corp. ignored) to USAspending recipients and LDA clients — a conservative match that misses subsidiaries on purpose. See methodology and corrections.
Not investment advice. Public records shown as filed; no recommendation is made or implied.