MIAX (MIAX) EVP surrenders 6,035 shares to cover tax withholding

Rhea-AI Filing Summary

MIAMI INTERNATIONAL HOLDINGS, INC. executive Edward Deitzel reported an administrative share transaction related to taxes. On February 18, 2026, he surrendered 6,035 shares of Common Stock at $40.89 per share to the company to satisfy tax withholding obligations tied to restricted stock awards.

A footnote explains this was a tax-withholding disposition and explicitly states it does not represent a sale by the reporting person. After this transaction, Deitzel directly owned 116,928 shares of Common Stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Deitzel Edward

Role EVP, CRO, CCO MIAX Exchanges

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	6,035	$40.89	$247K

Holdings After Transaction: Common Stock — 116,928 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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^*

Deitzel Edward

(Last) (First) (Middle)

C/O MIAMI INTERNATIONAL HOLDINGS, INC.

7 ROSZEL ROAD, SUITE 1A

(Street)

PRINCETON NJ 08540

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, CRO, CCO MIAX Exchanges

3. Date of Earliest Transaction (Month/Day/Year)
02/18/2026

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

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

X	Form filed by One Reporting Person
	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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/18/2026		F		6,035(1)	D	$40.89	116,928	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. Represents shares that have been surrendered to the Company to satisfy tax withholding and remittance obligations in connection with the net settlement of restricted stock awards and does not represent a sale by the reporting person.

Remarks:

	/s/ Barbara J. Comly, Attorney-in-fact	02/20/2026
	** 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.

FAQ

What insider transaction did MIAX executive Edward Deitzel report on this Form 4?

Edward Deitzel reported surrendering 6,035 shares of MIAX common stock. The shares were delivered back to the company to cover tax withholding obligations on restricted stock awards, rather than being sold on the open market.

Was the MIAX Form 4 transaction by Edward Deitzel a stock sale?

No, the transaction was not a stock sale. A footnote states the 6,035 shares were surrendered to the company solely to satisfy tax withholding and remittance obligations related to restricted stock awards.

How many MIAX shares does Edward Deitzel own after this reported transaction?

After the reported tax-withholding disposition, Edward Deitzel directly owns 116,928 shares of MIAX common stock. This figure reflects his holdings following the surrender of 6,035 shares back to the company.

What does transaction code F mean on the MIAX Form 4 for Edward Deitzel?

Transaction code F indicates shares were used to pay an exercise price or tax liability. In this case, Deitzel’s 6,035 MIAX shares were surrendered to cover tax withholding on restricted stock awards, not sold for investment purposes.

How was the price per share reported for Edward Deitzel’s MIAX tax-withholding transaction?

The Form 4 reports a price of $40.89 per MIAX share for the 6,035 surrendered shares. This figure is used to calculate the value of stock applied toward Deitzel’s tax withholding obligations related to his restricted stock awards.