MIAX EVP Shelly Brown awarded shares, options

MIAMI INTERNATIONAL HOLDINGS, INC. executive Shelly Brown, EVP and Chief Strategy Officer, received equity awards in the form of common stock and stock options.

Rhea-AI Filing Summary

MIAMI INTERNATIONAL HOLDINGS, INC. executive Shelly Brown, EVP and Chief Strategy Officer, received equity awards in the form of common stock and stock options. She was granted 37,276 shares of common stock as restricted stock units, bringing her direct common stock holdings to 353,990 shares after the award.

Brown was also granted a nonqualified stock option for 35,861 shares and an incentive stock option for 2,485 shares, each exercisable for common stock at an exercise price of $40.24 per share and expiring on June 15, 2036. The RSUs and options vest in three annual installments on June 16, 2027, 2028, and 2029, contingent on her continued service with the company.

Insider Trade Summary

Grant/Award: 75,622 shares

Grant/Award 3 txns

Insider Brown Shelly

Role EVP, Chief Strategy Officer

Type	Security	Shares	Price	Value
Grant/Award	Incentive Stock Option (Right to Buy)	2,485	$0.00	$0.00
Grant/Award	Nonqualified Stock Option (Right to Buy)	35,861	$0.00	$0.00
Grant/Award	Common Stock	37,276	$0.00	$0.00

Holdings After Transaction: Incentive Stock Option (Right to Buy) — 2,485 contracts (Direct); Nonqualified Stock Option (Right to Buy) — 35,861 contracts (Direct); Common Stock — 353,990 shares (Direct)

Footnotes (3)

1. F1. The amount represents restricted stock units ("RSUs") that vest as to 12,426 shares on June 16, 2027, 12,425 on June 16, 2028 and the remaining 12,425 on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through the applicable vesting date.
2. F2. 829 of the shares subject to this option will vest on June 16, 2027, 828 of the shares subject to this option will vest on June 16, 2028 and the remaining 828 of the shares subject to this option will vest on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through the applicable vesting date.
3. F3. 11,955 of the shares subject to this option will vest on June 16, 2027, 11,953 of the shares subject to this option will vest on June 16, 2028 and the remaining 11,953 of the shares subject to this option will vest on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through the applicable vesting date.

Key Figures

RSUs granted: 37,276 shares Nonqualified stock option grant: 35,861 shares Incentive stock option grant: 2,485 shares +5 more

8 metrics

RSUs granted 37,276 shares Common stock award on June 16, 2026

Nonqualified stock option grant 35,861 shares Right to buy MIAX common stock

Incentive stock option grant 2,485 shares Right to buy MIAX common stock

Option exercise price $40.24 per share Both option grants

Option expiration date June 15, 2036 Both option series

Shares owned after award 353,990 shares Common stock directly held after RSU grant

First RSU vesting tranche 12,426 shares Vest on June 16, 2027

First option vesting tranche 829 shares Part of option grant vesting June 16, 2027

Key Terms

restricted stock units ("RSUs"), Nonqualified Stock Option (Right to Buy), Incentive Stock Option (Right to Buy), exercise price, +1 more

5 terms

restricted stock units ("RSUs") financial

"The amount represents restricted stock units ("RSUs") that vest as to 12,426 shares on June 16, 2027..."

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.

Nonqualified Stock Option (Right to Buy) financial

"Nonqualified Stock Option (Right to Buy) with an exercise price of 40.2400..."

Incentive Stock Option (Right to Buy) financial

"Incentive Stock Option (Right to Buy) with an exercise price of 40.2400..."

exercise price financial

"conversion_or_exercise_price: "40.2400" for the stock options granted..."

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

expiration date financial

"expiration_date: "2036-06-15T00:00:00.000Z" for both option awards..."

The expiration date is the deadline after which a financial contract, such as an option or a futures agreement, is no longer valid or can be exercised. It matters to investors because it determines the timeframe during which they can take action or benefit from the contract, similar to how a coupon or a food item has a limited period of usefulness. Once the expiration date passes, the contract loses its value or ability to be used.

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

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Accepted by SEC EDGAR 06/18/2026 - 04:17 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^*

Brown Shelly

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, Chief Strategy Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/16/2026

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	06/16/2026		A		37,276(1)	A	$0	353,990	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
Incentive Stock Option (Right to Buy)	$40.24	06/16/2026		A		2,485		(2)	06/15/2036	Common Stock	2,485	$0	2,485	D
Nonqualified Stock Option (Right to Buy)	$40.24	06/16/2026		A		35,861		(3)	06/15/2036	Common Stock	35,861	$0	35,861	D

Explanation of Responses:

1. The amount represents restricted stock units ("RSUs") that vest as to 12,426 shares on June 16, 2027, 12,425 on June 16, 2028 and the remaining 12,425 on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through the applicable vesting date.

2. 829 of the shares subject to this option will vest on June 16, 2027, 828 of the shares subject to this option will vest on June 16, 2028 and the remaining 828 of the shares subject to this option will vest on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through the applicable vesting date.

3. 11,955 of the shares subject to this option will vest on June 16, 2027, 11,953 of the shares subject to this option will vest on June 16, 2028 and the remaining 11,953 of the shares subject to this option will vest on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through the applicable vesting date.

Remarks:

	/s/Alessandra Maria Corona Henriques, Attorney-in-Fact	06/18/2026
	** 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)