MIAX director receives stock awards in Form 4

MIAMI INTERNATIONAL HOLDINGS, INC. director Lisa Moore reported two equity compensation grants of common stock.

Rhea-AI Filing Summary

MIAMI INTERNATIONAL HOLDINGS, INC. director Lisa Moore reported two equity compensation grants of common stock. On June 16, 2026, she acquired 4,970 shares of common stock at no cash cost through restricted stock units (RSUs) that fully vested on the grant date, with her direct holdings increasing to 12,737 shares afterward. On June 15, 2026, she acquired an additional 2,267 shares at no cash cost through RSUs that will vest on the last business day immediately before the 2027 annual meeting of stockholders, bringing her direct holdings to 7,767 shares following that earlier grant. These transactions reflect stock-based compensation awards rather than open-market purchases or sales.

Insider Trade Summary

Grant/Award: 7,237 shares

Grant/Award 2 txns

Insider Moore Lisa

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	4,970	$0.00	$0.00
Grant/Award	Common Stock	2,267	$0.00	$0.00

Holdings After Transaction: Common Stock — 12,737 shares (Direct)

Footnotes (2)

1. F1. The amount represents restricted stock units ("RSUs") that fully vested on the date of grant. Each RSU represents a right to receive one share of the Issuer's common stock.
2. F2. The amount represents RSUs that vest on the last business day immediately preceding the 2027 annual meeting of stockholders, subject to the reporting person's continued service to the Issuer through the vesting date.

Key Figures

RSU grant (fully vested): 4,970 shares RSU grant (2027 vesting): 2,267 shares Holdings after latest grant: 12,737 shares +2 more

5 metrics

RSU grant (fully vested) 4,970 shares Common stock delivered via RSUs on June 16, 2026

RSU grant (2027 vesting) 2,267 shares Common stock underlying RSUs vesting before 2027 annual meeting

Holdings after latest grant 12,737 shares Total direct common stock following June 16, 2026 transaction

Holdings after earlier grant 7,767 shares Total direct common stock following June 15, 2026 transaction

Transaction price per share $0.0000 per share Both common stock awards reported as no-cash-cost RSU grants

Key Terms

restricted stock units ("RSUs"), vest, Form 4, grant, award, or other acquisition

4 terms

restricted stock units ("RSUs") financial

"The amount represents restricted stock units ("RSUs") that fully vested on the date of grant."

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

vest financial

"The amount represents RSUs that vest on the last business day immediately preceding the 2027 annual meeting of stockholders"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

FAQ

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

What insider transactions did MIAX director Lisa Moore report on this Form 4?

Lisa Moore reported two stock-based compensation grants of common stock. She acquired 4,970 shares on June 16, 2026 and 2,267 shares on June 15, 2026 through restricted stock unit awards at no cash cost.

Were Lisa Moore’s MIAX Form 4 transactions open-market buys or sells?

The transactions were not open-market buys or sells. Both entries are coded as awards (code A), representing restricted stock unit grants that deliver common shares as equity compensation rather than cash purchases or public market sales.

How many MIAX shares does Lisa Moore hold after these reported grants?

After the most recent reported grant on June 16, 2026, Lisa Moore directly holds 12,737 shares of MIAMI INTERNATIONAL HOLDINGS, INC. common stock. This reflects her increased ownership from the fully vested restricted stock unit award delivered on that date.

What are the vesting terms of Lisa Moore’s new MIAX restricted stock units?

One RSU grant of 4,970 units fully vested on the June 16, 2026 grant date. A separate 2,267-unit RSU grant vests on the last business day immediately before the company’s 2027 annual meeting, contingent on her continued service through that vesting date.

Did Lisa Moore pay any price per share for the MIAX stock reported on this Form 4?

No cash price was paid per share for these awards. The Form 4 shows a price of $0.0000 per share, indicating the common stock was issued as part of restricted stock unit compensation rather than purchased in the market.

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

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Accepted by SEC EDGAR 06/17/2026 - 04:31 PM EDT Learn about SEC filing dates

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^*

Moore Lisa

(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)
06/15/2026

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	06/15/2026		A		2,267(1)	A	$0	7,767	D
Common Stock	06/16/2026		A		4,970(2)	A	$0	12,737	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. The amount represents restricted stock units ("RSUs") that fully vested on the date of grant. Each RSU represents a right to receive one share of the Issuer's common stock.

2. The amount represents RSUs that vest on the last business day immediately preceding the 2027 annual meeting of stockholders, subject to the reporting person's continued service to the Issuer through the vesting date.

Remarks:

	/s/Alessandra Maria Corona Henriques, Attorney-in-Fact	06/17/2026
	** 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)