Dudediligence.

Miami International Holdings, Inc

MIAXNYSE · Security Brokers, Dealers & Flotation Companies
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Last 12 months

Sales planned on beside the trades reported on , and whether each names a .

Planned ·

$87.4M

32 notices · 2,063,679 sh

Oct 2025 to Oct 2026

Reported ·

$44.1M

37 sales · 3 buys · $722,511 bought

Oct 2025 to Jun 2026

The two figures cover different periods.

34 of 37 reported sales carry the 10b5-1 box. Together they are 1.03% of the shares on issue.

PLANNED · FORM 144Oct 2025 to Oct 2026REPORTED · FORM 4Oct 2025 to Jun 2026N2025DJ2026FMAMJJASO2026-10-02: DOUGLAS M. SCHAFER JR., Form 1442026-09-16: SHELLY BROWN, Form 1442026-09-03: GALLAGHER INVESTMENTS LLC, Form 1442026-08-19: GALLAGHER INVESTMENTS LLC, Form 1442026-08-17: Lance Emmons, Form 1442026-08-04: GALLAGHER INVESTMENTS LLC, Form 1442026-08-04: J. GRAY TEEKELL, Form 1442026-08-04: HARISH JAYABALAN, Form 1442026-08-04: BARBARA J. COMLY, Form 1442026-08-04: EDWARD DEITZEL, Form 1442026-07-15: CYNTHIA SCHWARZKOPF, Form 1442026-07-06: HARISH JAYABALAN, Form 1442026-07-06: SHELLY BROWN, Form 1442026-07-02: DOUGLAS M. SCHAFER JR., Form 1442026-07-02: KURT M. ECKERT, Form 1442026-06-15: SHELLY BROWN, Form 1442026-06-11: CYNTHIA SCHWARZKOPF, Form 1442026-06-08: HARISH JAYABALAN, Form 1442026-05-15: Lance Emmons, Form 1442026-05-04: J. GRAY TEEKELL, Form 1442026-05-04: SHELLY BROWN, Form 1442026-05-04: EDWARD DEITZEL, Form 1442026-04-15: BARBARA J COMLY, Form 1442026-04-15: GALLAGHER INVESTMENTS LLC, Form 1442026-04-15: THOMAS P GALLAGHER, Form 1442026-04-07: EDWARD DEITZEL, Form 1442026-04-07: SHELLY BROWN, Form 1442026-04-06: SHELLY BROWN, Form 1442026-03-25: J. GRAY TEEKELL, Form 1442026-03-23: SHELLY BROWN, Form 1442026-03-19: KURT M ECKERT, Form 1442026-03-17: DOUGLAS M. SCHAFER JR., Form 1442025-12-12: HORIZON KINETICS ASSET MANAGEMENT LLC, bought2026-03-02: HORIZON KINETICS ASSET MANAGEMENT LLC, sold2026-03-02: HORIZON KINETICS ASSET MANAGEMENT LLC, sold2026-03-04: HORIZON KINETICS ASSET MANAGEMENT LLC, bought2026-03-05: HORIZON KINETICS ASSET MANAGEMENT LLC, bought2026-03-17: Schafer Douglas M. JR, sold2026-03-19: Eckert Kurt M., sold2026-03-23: Brown Shelly, sold2026-03-25: Teekell Judson Gray, sold2026-04-02: Teekell Judson Gray, sold2026-04-06: Brown Shelly, sold2026-04-07: Deitzel Edward, sold2026-04-08: Brown Shelly, sold2026-04-15: Comly Barbara J., sold2026-04-15: Gallagher Thomas P., sold2026-05-04: Deitzel Edward, sold2026-05-04: Gallagher Thomas P., sold2026-05-04: Teekell Judson Gray, sold2026-05-04: Schafer Douglas M. JR, sold2026-05-04: Brown Shelly, sold2026-05-04: Eckert Kurt M., sold2026-05-04: Comly Barbara J., sold2026-05-05: Gallagher Thomas P., sold2026-05-15: Emmons Lance, sold2026-06-02: Teekell Judson Gray, sold2026-06-02: Schafer Douglas M. JR, sold2026-06-02: Gallagher Thomas P., sold2026-06-02: Brown Shelly, sold2026-06-02: Deitzel Edward, sold2026-06-02: Eckert Kurt M., sold2026-06-02: Comly Barbara J., sold2026-06-08: Jayabalan Harish, sold2026-06-11: Schwarzkopf Cynthia, sold2026-06-15: Brown Shelly, sold
under a no plan named▼ sale▲ buysize is dollars

Form 144 notices, newest first

2026-10-02DOUGLAS M. SCHAFER JR., EVP and CIO$4,050,000
120,000 shplan 2025-12-16Form 4s on file end Jun 23144 ↗
2026-09-16SHELLY BROWN, EVP, Chief Strategy Officer$838,284
21,217 shplan 2025-12-22Form 4s on file end Jun 23144 ↗
2026-09-03GALLAGHER INVESTMENTS LLC, Chairman & CEO$5,727,420
141,000 shplan 2025-12-29Form 4s on file end Jun 23144 ↗
2026-08-19GALLAGHER INVESTMENTS LLC, Chairman & CEO$6,273,927
149,700 shplan 2025-12-29Form 4s on file end Jun 23144 ↗
2026-08-17Lance Emmons, EVP and CFO$1,523,200
35,000 shplan 2025-12-17Form 4s on file end Jun 23144 ↗
2026-08-04GALLAGHER INVESTMENTS LLC, Chairman & CEO$2,263,481
48,334 shplan 2025-12-29Form 4s on file end Jun 23144 ↗
2026-08-04J. GRAY TEEKELL, Director$280,980
6,000 shplan 2025-12-17Form 4s on file end Jun 23144 ↗
2026-08-04HARISH JAYABALAN, EVP, CISO and CRO$2,992,531
63,902 shplan 2026-03-09Form 4s on file end Jun 23144 ↗
2026-08-04BARBARA J. COMLY, EVP, GC & Corporate Secretary$8,455,484
180,557 shplan 2025-12-18Form 4s on file end Jun 23144 ↗
2026-08-04EDWARD DEITZEL, EVP, CRO, CCO MIAX Exchanges$2,060,520
44,000 shplan 2025-12-30Form 4s on file end Jun 23144 ↗
2026-07-15CYNTHIA SCHWARZKOPF, Director$619,500
15,000 shplan 2026-03-12Form 4s on file end Jun 23144 ↗
2026-07-06HARISH JAYABALAN, EVP, CISO and CRO$816,800
20,000 shplan 2026-03-09Form 4s on file end Jun 23144 ↗
2026-07-06SHELLY BROWN, EVP, Chief Strategy Officer$653,440
16,000 shplan 2025-12-22Form 4s on file end Jun 23144 ↗
2026-07-02DOUGLAS M. SCHAFER JR., EVP and CIO$5,623,200
144,000 shplan 2025-12-16Form 4s on file end Jun 23144 ↗
2026-07-02KURT M. ECKERT, Director$246,523
6,313 shplan 2025-12-18Form 4s on file end Jun 23144 ↗
2026-06-15SHELLY BROWN, EVP, Chief Strategy Officer$204,069
4,714 shplan 2025-12-22144 ↗
Form 4, 2026-06-17: sold 4,714 at $44.23 Form 4 ↗
2026-06-11CYNTHIA SCHWARZKOPF, Director$795,405
19,500 shplan 2026-03-12144 ↗
Form 4, 2026-06-12: sold 19,500 at $41.73 Form 4 ↗
2026-06-08HARISH JAYABALAN, EVP, CISO and CRO$784,200
20,000 shplan 2026-03-09144 ↗
Form 4, 2026-06-10: sold 20,000 at $40.08 Form 4 ↗
2026-05-15Lance Emmons, EVP and CFO$1,932,350
35,000 shplan 2025-12-17144 ↗
Form 4, 2026-05-18: sold 35,000 at $56.36 Form 4 ↗
2026-05-04J. GRAY TEEKELL, Director$424,530
9,000 shplan 2025-12-17Form 4s on file end Jun 23144 ↗
2026-05-04SHELLY BROWN, EVP, Chief Strategy Officer$1,509,440
32,000 shplan 2025-12-22144 ↗
Form 4, 2026-05-05: sold 16,000 at $47.28 Form 4 ↗
2026-05-04EDWARD DEITZEL, EVP, CRO, CCO MIAX Exchanges$1,556,610
33,000 shplan 2025-12-30144 ↗
Form 4, 2026-05-05: sold 11,000 at $47.28 Form 4 ↗
2026-04-15BARBARA J COMLY, EVP, GC & Corporate Secretary$6,078,931
141,667 shplan 2025-12-18144 ↗
Form 4, 2026-04-17: sold 29,667 at $43.64 Form 4 ↗
2026-04-15GALLAGHER INVESTMENTS LLC, Chairman & CEO$19.5M
454,125 shplan 2025-12-29144 ↗
Form 4, 2026-04-17: sold 224,025 at $43.43 Form 4 ↗
2026-04-15THOMAS P GALLAGHER, Chairman & CEO$2,141,209
49,900 shplan 2025-12-29Form 4s on file end Jun 23144 ↗
2026-04-07EDWARD DEITZEL, EVP, CRO, CCO MIAX Exchanges$513,506
12,335 shplan 2025-12-30144 ↗
Form 4, 2026-04-09: sold 12,335 at $42.01 Form 4 ↗
2026-04-07SHELLY BROWN, EVP, Chief Strategy Officer$721,614
17,334 shplan 2025-12-22144 ↗
Form 4, 2026-04-09: sold 16,434 at $42.08 Form 4 ↗
2026-04-06SHELLY BROWN, EVP, Chief Strategy Officer$94,681
2,357 shplan 2025-12-22144 ↗
Form 4, 2026-04-08: sold 3,257 at $41.52 Form 4 ↗
2026-03-25J. GRAY TEEKELL, Director$118,380
3,000 shplan 2025-12-17144 ↗
Form 4, 2026-03-26: sold 300 at $40.00 Form 4 ↗
2026-03-23SHELLY BROWN, EVP, Chief Strategy Officer$1,013,941
25,932 shplan 2025-12-22144 ↗
Form 4, 2026-03-24: sold 25,932 at $39.33 Form 4 ↗
2026-03-19KURT M ECKERT, Director$1,929,724
48,792 shplan 2025-12-18144 ↗
Form 4, 2026-03-20: sold 37,917 at $39.00 Form 4 ↗
2026-03-17DOUGLAS M. SCHAFER JR., EVP and CIO$5,686,560
144,000 shplan 2025-12-16144 ↗
Form 4, 2026-03-18: sold 48,000 at $39.74 Form 4 ↗