As of the latest Form 4 filed Jul 9, 2026.
What Miami International Holdings, Inc. insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 142 most recent filings for MIAX.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-07-09 | 2026-07-08 | BROWN DAVID A Director | FTax | −171.00 | $43.72 | $7.48K | No | Form 4 ↗ |
| 2026-07-07 | 2026-07-07 | Gallagher Thomas P. Chairman & CEO | SSale | −28.2K | $42.27 | $1.19M | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-07 | Gallagher Thomas P., Chairman & CEO | MExercise | +28.2K | $12.00 | $339K | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-06 | Gallagher Thomas P., Chairman & CEO | SSale | −41.8K | $42.09 | $1.76M | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-06 | Gallagher Thomas P., Chairman & CEO | MExercise | +41.8K | $12.00 | $501K | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-06 | Jayabalan Harish EVP, CISO and CRO | SSale | −20.0K | $42.12 | $842K | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-06 | Jayabalan Harish, EVP, CISO and CRO | MExercise | +2.50K | $12.00 | $30.0K | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-06 | Jayabalan Harish, EVP, CISO and CRO | MExercise | +16.7K | $12.00 | $200K | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-06 | Jayabalan Harish, EVP, CISO and CRO | MExercise | +834.00 | $12.00 | $10.0K | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-06 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | SSale | −11.0K | $42.04 | $462K | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-06 | Deitzel Edward, EVP, CRO, CCO MIAX Exchanges | MExercise | +3.67K | $12.00 | $44.0K | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-06 | Deitzel Edward, EVP, CRO, CCO MIAX Exchanges | MExercise | +7.33K | $12.00 | $88.0K | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-06 | Brown Shelly EVP, Chief Strategy Officer | SSale | −16.0K | $42.13 | $674K | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-06 | Brown Shelly, EVP, Chief Strategy Officer | MExercise | +16.0K | $12.00 | $192K | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-02 | Teekell Judson Gray Director | SSale | −3.00K | $40.00 | $120K | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-02 | Eckert Kurt M. Director | SSale | −5.25K | $39.35 | $207K | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-02 | Eckert Kurt M., Director | MExercise | +5.25K | $12.00 | $63.0K | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-02 | Comly Barbara J. EVP, GC & Corporate Secretary | SSale | −28.0K | $41.22 | $1.15M | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-02 | Comly Barbara J., EVP, GC & Corporate Secretary | MExercise | +28.0K | $12.00 | $336K | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-02 | Schafer Douglas M. JR EVP and CIO | SSale | −48.0K | $41.22 | $1.98M | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-02 | Schafer Douglas M. JR, EVP and CIO | MExercise | +42.0K | $12.00 | $504K | Yes (planned) | Form 4 ↗ |
| 2026-07-07 | 2026-07-02 | Schafer Douglas M. JR, EVP and CIO | MExercise | +6.00K | $12.00 | $72.0K | Yes (planned) | Form 4 ↗ |
| 2026-06-18 | 2026-06-16 | Comly Barbara J. EVP, GC & Corporate Secretary | AAward | +39.1K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-18 | 2026-06-16 | Smollen John EVP, New Product Development | AAward | +7.46K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-18 | 2026-06-16 | Emmons Lance EVP and CFO | AAward | +37.3K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-18 | 2026-06-16 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | AAward | +9.32K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-18 | 2026-06-16 | Vermaas Cees CEO of TISEG | AAward | +4.66K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-18 | 2026-06-16 | Jayabalan Harish EVP, CISO and CRO | AAward | +4.66K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-18 | 2026-06-16 | Brown Shelly EVP, Chief Strategy Officer | AAward | +37.3K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-18 | 2026-06-16 | Gallagher Thomas P. Chairman & CEO | AAward | +233K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-18 | 2026-06-16 | Schafer Douglas M. JR EVP and CIO | AAward | +23.3K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | Moore Lisa Director | AAward | +4.97K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | Lozier Kenneth W. Director | AAward | +4.97K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | Massad Mark I. Director | AAward | +4.97K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | Al-Bahar Talal Jassim Director | AAward | +4.97K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | Eckert Kurt M. Director | AAward | +4.97K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | Schwarzkopf Cynthia Director | AAward | +4.97K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | Beckelman John Director | AAward | +4.97K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | Raymond Mark F. Director | AAward | +4.97K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | Raymond Mark F., Director | MExercise | +16.0K | $12.00 | $192K | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | Teekell Judson Gray Director | AAward | +4.97K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | Sommers Jill E. Director | AAward | +4.97K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | BROWN DAVID A Director | AAward | +4.97K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | Stahlin Paul Director | AAward | +4.97K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-16 | Sites Eric Director | AAward | +4.97K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Moore Lisa Director | AAward | +2.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Becker Lee Director | AAward | +2.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Lozier Kenneth W. Director | AAward | +2.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Massad Mark I. Director | AAward | +2.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Al-Bahar Talal Jassim Director | AAward | +2.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Eckert Kurt M. Director | AAward | +2.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Schwarzkopf Cynthia Director | AAward | +2.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Beckelman John Director | AAward | +2.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Brown Shelly EVP, Chief Strategy Officer | SSale | −4.71K | $44.23 | $209K | Yes (planned) | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Raymond Mark F. Director | AAward | +2.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Teekell Judson Gray Director | AAward | +2.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Sommers Jill E. Director | AAward | +1.11K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | BROWN DAVID A Director | AAward | +2.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Stahlin Paul Director | AAward | +2.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Sites Eric Director | AAward | +714.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-12 | 2026-06-11 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | FTax | −5.94K | $40.79 | $242K | No | Form 4 ↗ |
| 2026-06-12 | 2026-06-11 | Schwarzkopf Cynthia Director | SSale | −19.5K | $41.73 | $814K | Yes (planned) | Form 4 ↗ |
| 2026-06-12 | 2026-06-11 | Schwarzkopf Cynthia, Director | MExercise | +19.5K | $12.00 | $234K | Yes (planned) | Form 4 ↗ |
| 2026-06-12 | 2026-06-11 | Brown Shelly EVP, Chief Strategy Officer | FTax | −3.62K | $40.79 | $148K | No | Form 4 ↗ |
| 2026-06-12 | 2026-06-11 | Schafer Douglas M. JR EVP and CIO | FTax | −32.6K | $40.79 | $1.33M | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-11 | Stahlin Paul Director | FTax | −1.18K | $40.79 | $48.0K | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-11 | Stahlin Paul, Director | MExercise | +4.00K | $12.00 | $48.0K | No | Form 4 ↗ |
| 2026-06-11 | 2026-06-09 | Stahlin Paul, Director | MExercise | +7.00K | $12.00 | $84.0K | No | Form 4 ↗ |
| 2026-06-10 | 2026-06-09 | Jayabalan Harish EVP, CISO and CRO | SSale | −9.78K | $40.04 | $392K | Yes (planned) | Form 4 ↗ |
| 2026-06-10 | 2026-06-09 | Jayabalan Harish, EVP, CISO and CRO | MExercise | +9.78K | $12.00 | $117K | Yes (planned) | Form 4 ↗ |
| 2026-06-10 | 2026-06-08 | Jayabalan Harish, EVP, CISO and CRO | SSale | −10.2K | $40.12 | $410K | Yes (planned) | Form 4 ↗ |
| 2026-06-10 | 2026-06-08 | Jayabalan Harish, EVP, CISO and CRO | MExercise | +10.2K | $12.00 | $123K | Yes (planned) | Form 4 ↗ |
| 2026-06-04 | 2026-06-02 | Comly Barbara J. EVP, GC & Corporate Secretary | SSale | −28.0K | $42.85 | $1.20M | Yes (planned) | Form 4 ↗ |
| 2026-06-04 | 2026-06-02 | Comly Barbara J., EVP, GC & Corporate Secretary | MExercise | +28.0K | $12.00 | $336K | Yes (planned) | Form 4 ↗ |
| 2026-06-04 | 2026-06-02 | Eckert Kurt M. Director | SSale | −5.25K | $42.76 | $224K | Yes (planned) | Form 4 ↗ |
| 2026-06-04 | 2026-06-02 | Eckert Kurt M., Director | MExercise | +5.25K | $12.00 | $63.0K | Yes (planned) | Form 4 ↗ |
| 2026-06-04 | 2026-06-02 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | SSale | −11.0K | $42.16 | $464K | Yes (planned) | Form 4 ↗ |
| 2026-06-04 | 2026-06-02 | Deitzel Edward, EVP, CRO, CCO MIAX Exchanges | MExercise | +11.0K | $12.00 | $132K | Yes (planned) | Form 4 ↗ |
| 2026-06-04 | 2026-06-02 | Brown Shelly EVP, Chief Strategy Officer | SSale | −16.0K | $42.12 | $674K | Yes (planned) | Form 4 ↗ |
| 2026-06-04 | 2026-06-02 | Brown Shelly, EVP, Chief Strategy Officer | MExercise | +16.0K | $12.00 | $192K | Yes (planned) | Form 4 ↗ |
| 2026-06-04 | 2026-06-02 | Gallagher Thomas P. Chairman & CEO | SSale | −70.0K | $42.36 | $2.97M | Yes (planned) | Form 4 ↗ |
| 2026-06-04 | 2026-06-02 | Gallagher Thomas P., Chairman & CEO | MExercise | +70.0K | $12.00 | $840K | Yes (planned) | Form 4 ↗ |
| 2026-06-04 | 2026-06-02 | Schafer Douglas M. JR EVP and CIO | SSale | −48.0K | $42.84 | $2.06M | Yes (planned) | Form 4 ↗ |
| 2026-06-04 | 2026-06-02 | Schafer Douglas M. JR, EVP and CIO | MExercise | +48.0K | $12.00 | $576K | Yes (planned) | Form 4 ↗ |
| 2026-06-04 | 2026-06-02 | Teekell Judson Gray Director | SSale | −3.00K | $42.78 | $128K | Yes (planned) | Form 4 ↗ |
| 2026-05-21 | 2026-05-19 | HORIZON KINETICS ASSET MANAGEMENT LLC 10% owner | JOther | −2.46M | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-13 | 2026-05-11 | Gallagher Thomas P. Chairman & CEO | MExercise | +25.0K | $12.00 | $300K | No | Form 4 ↗ |
| 2026-05-07 | 2026-05-05 | Gallagher Thomas P. Chairman & CEO | SSale | −15.8K | $47.92 | $756K | Yes (planned) | Form 4 ↗ |
| 2026-05-07 | 2026-05-05 | Gallagher Thomas P., Chairman & CEO | MExercise | +15.8K | $12.00 | $189K | Yes (planned) | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | Comly Barbara J. EVP, GC & Corporate Secretary | SSale | −28.0K | $47.26 | $1.32M | Yes (planned) | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | Comly Barbara J., EVP, GC & Corporate Secretary | MExercise | +28.0K | $12.00 | $336K | Yes (planned) | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | Eckert Kurt M. Director | SSale | −5.63K | $47.29 | $266K | Yes (planned) | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | Eckert Kurt M., Director | MExercise | +5.63K | $12.00 | $67.5K | Yes (planned) | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | Brown Shelly EVP, Chief Strategy Officer | SSale | −16.0K | $47.28 | $756K | Yes (planned) | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | Brown Shelly, EVP, Chief Strategy Officer | MExercise | +16.0K | $12.00 | $192K | Yes (planned) | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | Schafer Douglas M. JR EVP and CIO | SSale | −48.0K | $47.25 | $2.27M | Yes (planned) | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | Schafer Douglas M. JR, EVP and CIO | MExercise | +48.0K | $12.00 | $576K | Yes (planned) | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | Teekell Judson Gray Director | SSale | −3.00K | $47.30 | $142K | Yes (planned) | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | Gallagher Thomas P. Chairman & CEO | SSale | −54.2K | $47.26 | $2.56M | Yes (planned) | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | Gallagher Thomas P., Chairman & CEO | MExercise | +54.2K | $12.00 | $651K | Yes (planned) | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | SSale | −11.0K | $47.28 | $520K | Yes (planned) | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | Deitzel Edward, EVP, CRO, CCO MIAX Exchanges | MExercise | +11.0K | $12.00 | $132K | Yes (planned) | Form 4 ↗ |
| 2026-04-17 | 2026-04-15 | Gallagher Thomas P. Chairman & CEO | SSale | −49.9K | $43.68 | $2.18M | Yes (planned) | Form 4 ↗ |
| 2026-04-17 | 2026-04-15 | Gallagher Thomas P., Chairman & CEO | SSale | −104K | $43.36 | $4.51M | Yes (planned) | Form 4 ↗ |
| 2026-04-17 | 2026-04-15 | Gallagher Thomas P., Chairman & CEO | SSale | −70.0K | $43.36 | $3.04M | Yes (planned) | Form 4 ↗ |
| 2026-04-17 | 2026-04-15 | Gallagher Thomas P., Chairman & CEO | MExercise | +70.0K | $12.00 | $840K | Yes (planned) | Form 4 ↗ |
| 2026-04-17 | 2026-04-15 | Comly Barbara J. EVP, GC & Corporate Secretary | SSale | −29.7K | $43.64 | $1.29M | Yes (planned) | Form 4 ↗ |
| 2026-04-17 | 2026-04-15 | Comly Barbara J., EVP, GC & Corporate Secretary | MExercise | +29.7K | $12.00 | $356K | Yes (planned) | Form 4 ↗ |
| 2026-04-10 | 2026-04-09 | Beckelman John Director | MExercise | +8.67K | $12.00 | $104K | No | Form 4 ↗ |
| 2026-04-09 | 2026-04-08 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | SSale | −7.57K | $42.02 | $318K | Yes (planned) | Form 4 ↗ |
| 2026-04-09 | 2026-04-08 | Deitzel Edward, EVP, CRO, CCO MIAX Exchanges | MExercise | +7.57K | $12.00 | $90.9K | Yes (planned) | Form 4 ↗ |
| 2026-04-09 | 2026-04-08 | Brown Shelly EVP, Chief Strategy Officer | SSale | −16.4K | $42.08 | $692K | Yes (planned) | Form 4 ↗ |
| 2026-04-09 | 2026-04-08 | Brown Shelly, EVP, Chief Strategy Officer | MExercise | +16.4K | $12.00 | $197K | Yes (planned) | Form 4 ↗ |
| 2026-04-09 | 2026-04-07 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | SSale | −4.00K | $42.00 | $168K | Yes (planned) | Form 4 ↗ |
| 2026-04-09 | 2026-04-07 | Deitzel Edward, EVP, CRO, CCO MIAX Exchanges | MExercise | +4.00K | $12.00 | $48.0K | Yes (planned) | Form 4 ↗ |
| 2026-04-09 | 2026-04-07 | Deitzel Edward, EVP, CRO, CCO MIAX Exchanges | SSale | −762.00 | $42.00 | $32.0K | Yes (planned) | Form 4 ↗ |
| 2026-04-09 | 2026-04-07 | Deitzel Edward, EVP, CRO, CCO MIAX Exchanges | MExercise | +762.00 | $12.00 | $9.14K | Yes (planned) | Form 4 ↗ |
| 2026-04-08 | 2026-04-07 | Brown Shelly EVP, Chief Strategy Officer | SSale | −900.00 | $42.00 | $37.8K | Yes (planned) | Form 4 ↗ |
| 2026-04-08 | 2026-04-06 | Brown Shelly, EVP, Chief Strategy Officer | SSale | −2.36K | $41.33 | $97.4K | Yes (planned) | Form 4 ↗ |
| 2026-04-01 | 2026-03-30 | Comly Barbara J. EVP, GC & Corporate Secretary | FTax | −1.45K | $37.50 | $54.3K | No | Form 4 ↗ |
| 2026-04-01 | 2026-03-30 | Smollen John EVP, New Product Development | FTax | −362.00 | $37.50 | $13.6K | No | Form 4 ↗ |
| 2026-04-01 | 2026-03-30 | Emmons Lance EVP and CFO | FTax | −8.35K | $37.50 | $313K | No | Form 4 ↗ |
| 2026-04-01 | 2026-03-30 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | FTax | −707.00 | $37.50 | $26.5K | No | Form 4 ↗ |
| 2026-04-01 | 2026-03-30 | Brown Shelly EVP, Chief Strategy Officer | MExercise | +5.04K | $19.84 | $100.0K | No | Form 4 ↗ |
| 2026-04-01 | 2026-03-30 | Brown Shelly, EVP, Chief Strategy Officer | MExercise | +3.88K | $25.78 | $100.0K | No | Form 4 ↗ |
| 2026-04-01 | 2026-03-30 | Brown Shelly, EVP, Chief Strategy Officer | MExercise | +6.20K | $16.14 | $100.0K | No | Form 4 ↗ |
| 2026-04-01 | 2026-03-30 | Brown Shelly, EVP, Chief Strategy Officer | MExercise | +6.57K | $15.22 | $100.0K | No | Form 4 ↗ |
| 2026-04-01 | 2026-03-30 | Brown Shelly, EVP, Chief Strategy Officer | MExercise | +8.33K | $12.00 | $100.0K | No | Form 4 ↗ |
| 2026-04-01 | 2026-03-30 | Brown Shelly, EVP, Chief Strategy Officer | FTax | −1.81K | $37.50 | $67.8K | No | Form 4 ↗ |
| 2026-04-01 | 2026-03-30 | Gallagher Thomas P. Chairman & CEO | FTax | −20.9K | $37.50 | $783K | No | Form 4 ↗ |
| 2026-03-26 | 2026-03-25 | Teekell Judson Gray Director | SSale | −300.00 | $40.00 | $12.0K | No | Form 4 ↗ |
| 2026-03-24 | 2026-03-23 | Brown Shelly EVP, Chief Strategy Officer | SSale | −25.9K | $39.33 | $1.02M | Yes (planned) | Form 4 ↗ |
| 2026-03-20 | 2026-03-19 | Eckert Kurt M. Director | SSale | −37.9K | $39.00 | $1.48M | Yes (planned) | Form 4 ↗ |
| 2026-03-20 | 2026-03-19 | Eckert Kurt M., Director | MExercise | +12.9K | $12.00 | $155K | Yes (planned) | Form 4 ↗ |
| 2026-03-18 | 2026-03-17 | Schafer Douglas M. JR EVP and CIO | SSale | −48.0K | $39.74 | $1.91M | Yes (planned) | Form 4 ↗ |
| 2026-03-18 | 2026-03-17 | Schafer Douglas M. JR, EVP and CIO | MExercise | +48.0K | $12.00 | $576K | Yes (planned) | Form 4 ↗ |
| 2026-03-06 | 2026-03-05 | STAHL MURRAY Director | PPurchase | +7.20K | $43.08 | $310K | No | Form 4 ↗ |
| 2026-02-20 | 2026-02-18 | Deitzel Edward EVP, CRO, CCO MIAX Exchanges | FTax | −6.04K | $40.89 | $247K | No | Form 4 ↗ |
| 2026-02-20 | 2026-02-18 | Brown Shelly EVP, Chief Strategy Officer | FTax | −19.9K | $40.89 | $814K | No | Form 4 ↗ |
| 2026-02-20 | 2026-02-18 | Schafer Douglas M. JR EVP and CIO | FTax | −32.6K | $40.89 | $1.33M | No | Form 4 ↗ |
| 2026-02-12 | 2026-02-10 | Gallagher Thomas P. Chairman & CEO | FTax | −50.1K | $41.33 | $2.07M | No | Form 4 ↗ |
| 2026-02-12 | 2026-02-10 | Schafer Douglas M. JR EVP and CIO | FTax | −109K | $41.33 | $4.49M | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also MIAX’s full analysis or the market-wide insider trading feed. The tabs above jump to MIAX’s other SEC data.
Source: SEC Form 4 filings for MIAX, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.