Notice of Proposed Sale · 144
Miami International Holdings, Inc.
MIAXNYSEEQUITYCurrent
Notice of Proposed Sale
Structured filing — 144
primary_doc.xml
Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.
Proposed-sale notice
- Issuer
- Miami International Holdings, Inc.
- Issuer CIK
- 0001438472
- SEC file number
- 001-42805
- Phone
- 6098977300
- Person for whose account securities are to be sold
- GALLAGHER INVESTMENTS LLC
- Relationships to issuer
- Director · Officer
- Street
- 7 Roszel Road, Suite 1A
- City
- Princeton
- State / country code
- NJ
- Postal code
- 08540
Securities proposed for sale
| Security | Proposed units | Aggregate market value | Units outstanding | Approximate sale date | Exchange | Broker / market maker |
|---|---|---|---|---|---|---|
| Common | 48,334 | 2,263,481.22 | 94,907,086 | 08/04/2026 | NYSE | Morgan Stanley Smith Barney LLC Executive Financial Services |
Broker / market maker — proposed row 1, entry 1
- Name
- Morgan Stanley Smith Barney LLC Executive Financial Services
- Street
- 1 New York Plaza
- Street (continued)
- 8th Floor
- City
- New York
- State / country code
- NY
- Postal code
- 10004
Acquisition of securities to be sold
| Security | Acquired | Nature of acquisition | Acquired from | Amount acquired | Gift transaction | Payment date | Nature of payment |
|---|---|---|---|---|---|---|---|
| Common | 08/04/2026 | Exercise of Stock Options | Issuer | 48,334 | N | 08/04/2026 | Cash |
Sales reported in the preceding three months
| Seller | Security | Sale date | Amount sold | Gross proceeds |
|---|---|---|---|---|
| 10b5-1 Sales for GALLAGHER INVESTMENTS | Common | 07/13/2026 | 70,000 | 2,976,698.67 |
| 10b5-1 Sales for GALLAGHER INVESTMENTS | Common | 07/07/2026 | 28,228 | 1,193,200.38 |
| 10b5-1 Sales for GALLAGHER INVESTMENTS | Common | 07/06/2026 | 41,772 | 1,758,292.77 |
| 10b5-1 Sales for GALLAGHER INVESTMENTS | Common | 06/02/2026 | 70,000 | 2,964,969.00 |
| 10b5-1 Sales for GALLAGHER INVESTMENTS | Common | 05/05/2026 | 15,771 | 755,757.36 |
Seller — prior-sale row 1, entry 1
- Name
- 10b5-1 Sales for GALLAGHER INVESTMENTS
- Street
- 7 Roszel Road, Suite 1A
- City
- Princeton
- State / country code
- NJ
- Postal code
- 08540
Seller — prior-sale row 2, entry 1
- Name
- 10b5-1 Sales for GALLAGHER INVESTMENTS
- Street
- 7 Roszel Road, Suite 1A
- City
- Princeton
- State / country code
- NJ
- Postal code
- 08540
Seller — prior-sale row 3, entry 1
- Name
- 10b5-1 Sales for GALLAGHER INVESTMENTS
- Street
- 7 Roszel Road, Suite 1A
- City
- Princeton
- State / country code
- NJ
- Postal code
- 08540
Seller — prior-sale row 4, entry 1
- Name
- 10b5-1 Sales for GALLAGHER INVESTMENTS
- Street
- 7 Roszel Road, Suite 1A
- City
- Princeton
- State / country code
- NJ
- Postal code
- 08540
Seller — prior-sale row 5, entry 1
- Name
- 10b5-1 Sales for GALLAGHER INVESTMENTS
- Street
- 7 Roszel Road, Suite 1A
- City
- Princeton
- State / country code
- NJ
- Postal code
- 08540
Prior-sale reporting
- Nothing to report for the preceding three months
- N
Notice signature
- Notice date
- 08/04/2026
- Signed
- /s/ Thomas P. Gallagher
- Plan adoption dates
- 12/29/2025
Company context
We are a technology-driven leader in building and operating regulated financial marketplaces across multiple asset classes and geographies. Our MIAX Exchanges, MIAX Futures and BSX marketplaces are enabled by our in-house built, proprietary technology. We believe the speed and performance of our proprietary technology coupled with our fully integrated, award-winning customer service, sets us apart from our competitors.