Miami International director receives 20,250 shares

After the estate-related transactions, Teekell reported 89,501 directly held shares and a zero-share indirect position.

Available on EDGAR 11/09/2026 - 04:17 PM EST Accepted by SEC EDGAR 11/09/2026 - 04:16 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Miami International Holdings, Inc. director Judson Gray Teekell reported two estate-related transactions on November 5, 2026. In connection with his duties as executor of the Estate of Byrum W. Teekell, 81,000 shares held indirectly through the estate were distributed; Teekell acquired 20,250 shares directly pursuant to the estate distribution. After the acquisition, he reported 89,501 shares held directly and zero shares held indirectly through the estate.

Insider Trade Summary

Estate Transfer: 101,250 shares

Estate Transfer 2 txns

Insider Teekell Judson Gray

Role Director

Type	Security	Shares	Price	Value
Estate Transfer	Common Stock F1	81,000	$0.00	$0.00
Estate Transfer	Common Stock F2	20,250	$0.00	$0.00

Holdings After Transaction: Common Stock — 0 shares (Indirect, By estate of Byrum W. Teekell); Common Stock — 89,501 shares (Direct)

Holdings Before and After: Common Stock, 81,000 to 0 shares (Indirect, By estate of Byrum W. Teekell); Common Stock, 69,251 to 89,501 shares (Direct)

Footnotes (2)

1. F1. This transaction represents a distribution by the Reporting Person in connection with his duties as Executor of the Estate of Byrum W. Teekell.
2. F2. This transaction represents shares acquired pursuant to the distribution of the Estate of Byrum W. Teekell.

Key Figures

Shares distributed from estate: 81,000 shares Shares acquired directly: 20,250 shares Direct shares held after acquisition: 89,501 shares +1 more

4 metrics

Shares distributed from estate 81,000 shares November 5, 2026; held indirectly through the Estate of Byrum W. Teekell

Shares acquired directly 20,250 shares November 5, 2026; acquired through the estate distribution

Direct shares held after acquisition 89,501 shares Reported following the November 5, 2026 transaction

Indirect shares held after distribution 0 shares Reported following the November 5, 2026 transaction

Key Terms

laws of descent and distribution, Executor, estate distribution

3 terms

laws of descent and distribution regulatory

"Acquisition or disposition by will or laws of descent and distribution"

Executor regulatory

"duties as Executor of the Estate of Byrum W. Teekell"

estate distribution regulatory

"shares acquired pursuant to the distribution of the Estate"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many MIAX shares did Judson Gray Teekell acquire?

On November 5, 2026, Judson Gray Teekell acquired 20,250 shares of Miami International Holdings, Inc. common stock directly through a distribution of the Estate of Byrum W. Teekell. The reported directly held position after the acquisition was 89,501 shares.

How many MIAX shares were distributed from the Estate of Byrum W. Teekell?

The transaction reported a distribution of 81,000 shares held indirectly through the Estate of Byrum W. Teekell. It was made in connection with Teekell’s duties as executor, and the reported indirect position following the transaction was zero shares.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Teekell Judson Gray

(Last) (First) (Middle)

C/O MIAMI INTERNATIONAL HOLDINGS, INC.

7 ROSZEL ROAD, SUITE 1A

(Street)

PRINCETON NEW JERSEY 08540

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
MIAMI INTERNATIONAL HOLDINGS, INC. [ MIAX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
11/05/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/05/2026		W(1)		81,000	D	$0	0	I	By estate of Byrum W. Teekell
Common Stock	11/05/2026		W(2)		20,250	A	$0	89,501	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. This transaction represents a distribution by the Reporting Person in connection with his duties as Executor of the Estate of Byrum W. Teekell.

2. This transaction represents shares acquired pursuant to the distribution of the Estate of Byrum W. Teekell.

Remarks:

	/s/Alessandra Maria Corona Henriques, Attorney-in-Fact	11/09/2026
	** Signature of Reporting Person	Date
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.
* Form 4: SEC 1474 (03-26)