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

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

1. Name and Address of Reporting Person ^*

STAHL MURRAY

(Last)

(First)

(Middle)

470 PARK AVE S

8TH FLOOR SOUTH

(Street)

NEW YORK

10016

(City)

(State)

(Zip)

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)

3. Date of Earliest Transaction (Month/Day/Year)
03/02/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)
03/04/2026

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

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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	03/02/2026		X⁽¹⁾		21,290	A	$ 15	4,581,654	I	Horizon Kinetics Asset Management LLC
Common Stock	03/02/2026		X⁽¹⁾		91,366	A	$ 20.5	4,673,020	I	Horizon Kinetics Asset Management LLC
Common Stock	03/02/2026		S⁽¹⁾		53,578	D	$ 40.92	4,619,442	I	Horizon Kinetics Asset Management LLC

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Warrant (right to buy)	$ 15	03/02/2026		X			21,290	08/13/2025	04/08/2026	Common Stock	21,290	$ 0	0	I	Horizon Kinetics Asset Management LLC
Warrant (right to buy)	$ 20.5	03/02/2026		X			24,878	08/13/2025	11/15/2026	Common Stock	24,878	$ 0	0	I	Horizon Kinetics Asset Management LLC
Warrant (right to buy)	$ 20.5	03/02/2026		X			27,561	08/13/2025	02/05/2027	Common Stock	27,561	$ 0	0	I	Horizon Kinetics Asset Management LLC
Warrant (right to buy)	$ 20.5	03/02/2026		X			38,927	08/13/2025	10/17/2026	Common Stock	38,927	$ 0	0	I	Horizon Kinetics Asset Management LLC
Options	$ 16.14 ⁽²⁾							08/13/2025	07/31/2031	Miami International Holdings Inc	7,500		7,500	D
Options	$ 25.98 ⁽²⁾							08/13/2025	06/30/2032	Miami International Holdings Inc	10,000		10,000	D
Options	$ 19.84 ⁽²⁾							08/13/2025	03/26/2033	Miami International Holdings Inc	14,331		14,331	D
Options	$ 16.14 ⁽²⁾							08/13/2025	05/31/2031	Miami International Holdings Inc	2,500		2,500	D

Explanation of Responses:

1. This amendment corrects a previous filing that inadvertently included shares that are not subject to reporting and also corrects the share totals. Horizon Kinetics Asset Management LLC (HKAM) exercised warrants to purchase 112,656 shares of common stock at the exercise prices noted. HKAM paid the exercise price on a cashless basis, resulting in the Issuer withholding 53,578 of the warrant shares to pay the exercise price and issuing to HKAM the remaining 59,078 shares.

2. The Options given to Mr. Stahl are fully vested.

	/s/Jay Kesslen, attorney-in-fact	03/06/2026
	** Signature of Reporting Person	Date
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