# EDGAR Filing Document

**Accession Number:** 0001959770
**File Stem:** 0001628280-25-040784
**Filing Date:** 2025-8
**Character Count:** 11196
**Document Hash:** 9cf5c0c0dcdb98d2284ea2a9c7c6018b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001628280-25-040784.hdr.sgml**: 20250819

**ACCESSION NUMBER**: 0001628280-25-040784

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250815

**FILED AS OF DATE**: 20250819

**DATE AS OF CHANGE**: 20250819

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Teekell Judson Gray
- **CENTRAL INDEX KEY:** 0001959770

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42805
- **FILM NUMBER:** 251231759

**MAIL ADDRESS:**
- **STREET 1:** 8520 BUSINESS PARK DRIVE
- **CITY:** SHREVEPORT
- **STATE:** LA
- **ZIP:** 71105
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MIAMI INTERNATIONAL HOLDINGS, INC.
- **CENTRAL INDEX KEY:** 0001438472
- **STANDARD INDUSTRIAL CLASSIFICATION:** SECURITY BROKERS, DEALERS & FLOTATION COMPANIES [6211]
- **ORGANIZATION NAME:** 09 Crypto Assets
- **EIN:** 261482385
- **STATE OF INCORPORATION:** DE

**BUSINESS ADDRESS:**
- **STREET 1:** 7 ROSZEL ROAD
- **STREET 2:** FIFTH FLOOR, SUITE 1-A
- **CITY:** PRINCETON
- **STATE:** NJ
- **ZIP:** 08540
- **BUSINESS PHONE:** 609-897-7300

**MAIL ADDRESS:**
- **STREET 1:** 7 ROSZEL ROAD
- **STREET 2:** FIFTH FLOOR, SUITE 1-A
- **CITY:** PRINCETON
- **STATE:** NJ
- **ZIP:** 08540

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MIAMI INTERNATIONAL HOLDINGS INC
- **DATE OF NAME CHANGE:** 20080624

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Teekell Judson Gray<br><sub>(Last) (First) (Middle)</sub><br>C/O MIAMI INTERNATIONAL HOLDINGS, INC.<br>7 ROSZEL ROAD, SUITE 1A<br><sub>(Street)</sub><br>PRINCETON, NJ 08540<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-08-15 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>MIAMI INTERNATIONAL HOLDINGS, INC. [ MIAX ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2025-08-15 |  | C |  | 30000<sup>(1)</sup> | A | <sup>(1)</sup> | 62338<sup>(1)(2)</sup> | D |  |
| Common Stock | 2025-08-15 |  | C |  | 31242<sup>(2)</sup> | A | <sup>(1)</sup> | 62338<sup>(1)(2)</sup> | D |  |
| Common Stock | 2025-08-15 |  | C |  | 30000<sup>(3)</sup> | A | <sup>(1)</sup> | 86545<sup>(3)(4)</sup> | I | By estate of Byrum W. Teekell |
| Common Stock | 2025-08-15 |  | C |  | 38131<sup>(4)</sup> | A | <sup>(1)</sup> | 86545<sup>(3)(4)</sup> | I | By estate of Byrum W. Teekell |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Series B Preferred Stock | <sup>(1)</sup> | 2025-08-15 |  | C |  |  | 30000<sup>(1)</sup> | <sup>(1)</sup> | <sup>(1)</sup> | Common Stock | 30000 | $0 | 0 | D |  |
| Nonvoting Common Stock | <sup>(2)</sup> | 2025-08-15 |  | C |  |  | 31242<sup>(2)</sup> | <sup>(2)</sup> | <sup>(2)</sup> | Common Stock | 31242 | $0 | 0 | D |  |
| Series B Preferred Stock | <sup>(3)</sup> | 2025-08-15 |  | C |  |  | 30000<sup>(3)</sup> | <sup>(3)</sup> | <sup>(3)</sup> | Common Stock | 30000 | $0 | 0 | I | By estate of Byrum W. Teekell |
| Nonvoting Common Stock | <sup>(4)</sup> | 2025-08-15 |  | C |  |  | 38131<sup>(4)</sup> | <sup>(4)</sup> | <sup>(4)</sup> | Common Stock | 38131 | $0 | 0 | I | By estate of Byrum W. Teekell |
| Stock Option (Right to Buy) | 12<sup>(5)</sup> | 2025-08-15 |  | M |  |  | 22667<sup>(5)</sup> | <sup>(6)</sup> | 2026-06-19 | Nonvoting Common Stock | 22667 | $0 | 0 | D |  |
| Stock Option (Right to Buy) | 12<sup>(5)</sup> | 2025-08-15 |  | M |  | 22667<sup>(5)</sup> |  | <sup>(6)</sup> | 2026-06-19 | Common Stock | 22667 | $0 | 22667 | D |  |
| Stock Option (Right to Buy) | 12<sup>(5)</sup> | 2025-08-15 |  | M |  |  | 13500<sup>(5)</sup> | <sup>(6)</sup> | 2027-05-31 | Nonvoting Common Stock | 13500 | $0 | 0 | D |  |
| Stock Option (Right to Buy) | 12<sup>(5)</sup> | 2025-08-15 |  | M |  | 13500<sup>(5)</sup> |  | <sup>(5)</sup> | 2027-05-31 | Common Stock | 13500 | $0 | 13500 | D |  |
| Stock Option (Right to Buy) | 12<sup>(5)</sup> | 2025-08-15 |  | M |  |  | 12833<sup>(5)</sup> | <sup>(6)</sup> | 2028-04-30 | Nonvoting Common Stock | 12833 | $0 | 0 | D |  |
| Stock Option (Right to Buy) | 12<sup>(5)</sup> | 2025-08-15 |  | M |  | 12833<sup>(5)</sup> |  | <sup>(6)</sup> | 2028-04-30 | Nonvoting Common Stock | 12833 | $0 | 12833 | D |  |
| Stock Option (Right to Buy) | 12<sup>(5)</sup> | 2025-08-15 |  | M |  |  | 12500<sup>(5)</sup> | <sup>(6)</sup> | 2029-05-31 | Nonvoting Common Stock | 12500 | $0 | 0 | D |  |
| Stock Option (Right to Buy) | 12<sup>(5)</sup> | 2025-08-15 |  | M |  | 12500<sup>(5)</sup> |  | <sup>(6)</sup> | 2029-05-31 | Common Stock | 12500 | $0 | 12500 | D |  |
| Stock Option (Right to Buy) | 12<sup>(5)</sup> | 2025-08-15 |  | M |  |  | 5000<sup>(5)</sup> | <sup>(6)</sup> | 2029-06-30 | Nonvoting Common Stock | 5000 | $0 | 0 | D |  |
| Stock Option (Right to Buy) | 12<sup>(5)</sup> | 2025-08-15 |  | M |  | 5000<sup>(5)</sup> |  | <sup>(6)</sup> | 2029-06-30 | Common Stock | 5000 | $0 | 5000 | D |  |
| Stock Option (Right to Buy) | 14<sup>(5)</sup> | 2025-08-15 |  | M |  |  | 28125<sup>(5)</sup> | <sup>(6)</sup> | 2030-06-30 | Nonvoting Common Stock | 28125 | $0 | 0 | D |  |
| Stock Option (Right to Buy) | 14<sup>(5)</sup> | 2025-08-15 |  | M |  | 28125<sup>(5)</sup> |  | <sup>(6)</sup> | 2030-06-30 | Common Stock | 28125 | $0 | 28125 | D |  |
| Stock Option (Right to Buy) | 16.14<sup>(5)</sup> | 2025-08-15 |  | M |  |  | 20556<sup>(5)</sup> | <sup>(6)</sup> | 2031-05-31 | Nonvoting Common Stock | 20556 | $0 | 0 | D |  |
| Stock Option (Right to Buy) | 16.14<sup>(5)</sup> | 2025-08-15 |  | M |  | 20556<sup>(5)</sup> |  | <sup>(6)</sup> | 2031-05-31 | Common Stock | 20556 | $0 | 20556 | D |  |

---

### Footnotes:

(1) Includes 30,000 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering and which have no expiration date.

(2) Includes 31,242 shares of Nonvoting Common Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering and which have no expiration date.

(3) Includes 30,000 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering and which have no expiration date, and which are held in the estate of Byrum W. Teekell for which J. Gray Teekell is executor and disclaims beneficial ownership as to 22,500 shares of Common Stock The inclusion of such 22,500 shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purpose.

(4) Includes 38,131 shares of Nonvoting Common Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering and which have no expiration date, which are held in the estate of Byrum W. Teekell for which J. Gray Teekell is executor and disclaims beneficial ownership as to 28,599 shares of Common Stock. The inclusion of such 28,599 shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purpose.

(5) The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the initial public offering, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

(6) The options are fully vested.

**Signature:** /s/Alessandra Maria Corona Henriques, Attorney-in-Fact  
**Date:** 2025-08-19

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**