Miami International Holdings (MIAX) CFO surrenders shares for tax obligations

Rhea-AI Filing Summary

MIAMI INTERNATIONAL HOLDINGS, INC. executive vice president and CFO Lance Emmons surrendered 8,350 shares of common stock at $37.50 per share on March 30, 2026 to cover tax obligations on restricted stock awards. This tax-withholding disposition was not an open-market sale, and Emmons now directly holds 119,262 shares.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Emmons Lance

Role EVP and CFO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	8,350	$37.50	$313K

Holdings After Transaction: Common Stock — 119,262 shares (Direct)

Footnotes (1)

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Key Figures

Shares surrendered for taxes: 8,350 shares Price per share: $37.50 per share Shares held after transaction: 119,262 shares

3 metrics

Shares surrendered for taxes 8,350 shares Tax-withholding disposition on March 30, 2026

Price per share $37.50 per share Value used for tax-withholding share surrender

Shares held after transaction 119,262 shares Direct ownership by Lance Emmons after disposition

Key Terms

restricted stock awards, tax withholding, net settlement, tax-withholding disposition

4 terms

restricted stock awards financial

"in connection with the net settlement of restricted stock awards"

Restricted stock awards are company shares given to employees or executives that cannot be sold or transferred until certain conditions — like staying with the company for a set time or meeting performance targets — are met, like a gift that is locked in a safe until rules are satisfied. Investors care because these awards tie management’s pay to company performance, can increase the number of shares outstanding when they become tradable (dilution), and may signal expected future selling pressure or commitment to long-term growth.

tax withholding financial

"satisfy tax withholding and remittance obligations"

Tax withholding is the practice of taking a portion of a payment—such as wages, dividends, or sale proceeds—before it reaches the recipient and sending that portion to the tax authority as an advance on the recipient’s eventual tax bill. For investors it matters because withholding reduces immediate cash received and affects after‑tax returns, estimated tax payments, and whether you may owe more or receive a refund when taxes are finally calculated, like having a small automatic savings set aside for your tax bill.

net settlement financial

"in connection with the net settlement of restricted stock awards"

tax-withholding disposition financial

"transaction_action: "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

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^*

Emmons Lance

(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 and CFO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/30/2026

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	03/30/2026		F		8,350(1)	D	$37.5	119,262	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/Alessandra Maria Corona Henriques, Attorney-in-Fact	04/01/2026
	** 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)

FAQ

What did MIAX EVP and CFO Lance Emmons report on this Form 4?

Lance Emmons reported a tax-related share disposition. He surrendered 8,350 MIAX common shares at $37.50 each to satisfy withholding obligations on restricted stock awards, rather than selling shares on the open market.

Was the MIAX Form 4 transaction an open-market sale of shares?

No, it was not an open-market sale. The 8,350 MIAX shares were surrendered back to the company to cover tax withholding and remittance obligations tied to restricted stock awards, as clarified in the filing’s footnote.

How many MIAX shares does Lance Emmons hold after this tax withholding?

After the tax-withholding disposition, Lance Emmons directly holds 119,262 MIAX common shares. The filing shows this updated ownership figure following the surrender of 8,350 shares for tax obligations on restricted stock awards.

What does transaction code "F" mean on the MIAX Form 4 filing?

Transaction code "F" indicates shares were used to pay an exercise price or tax liability. In this MIAX filing, it reflects shares surrendered to satisfy tax withholding on restricted stock awards, not a discretionary purchase or sale in the market.

How large was the tax-withholding disposition reported by MIAX’s CFO?

The disposition involved 8,350 MIAX common shares at $37.50 per share. These shares were surrendered to the company solely to meet tax withholding and remittance obligations associated with the net settlement of restricted stock awards.