Miami International (MIAX) director receives RSU grants and boosts holdings

Rhea-AI Filing Summary

MIAMI INTERNATIONAL HOLDINGS, INC. director Judson Gray Teekell reported receiving equity awards in the form of common stock. On June 16, 2026, he acquired 4,970 shares of common stock at a stated price of $0.00 per share through a grant classified as a restricted stock unit (RSU) award that fully vested on the grant date. On June 15, 2026, he received an additional 2,267 RSUs, each representing one share of common stock, which vest on the last business day immediately preceding the 2027 annual meeting of stockholders, subject to his continued service with the company. Following these awards, his directly held common stock position increased to 78,251 shares.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Teekell Judson Gray

Role null

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

Holdings After Transaction: Common Stock — 78,251 shares (Direct, null)

Footnotes (1)

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. 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

RSUs granted (June 16, 2026): 4,970 shares RSUs granted (June 15, 2026): 2,267 shares Price per share for RSU grants: $0.00 per share +2 more

5 metrics

RSUs granted (June 16, 2026) 4,970 shares Award of RSUs that fully vested on grant date

RSUs granted (June 15, 2026) 2,267 shares Award of RSUs vesting before 2027 annual meeting

Price per share for RSU grants $0.00 per share Stated transaction price for both common stock awards

Shares held after June 16, 2026 award 78,251 shares Total direct common stock holdings following latest RSU grant

Shares held after June 15, 2026 award 73,281 shares Direct common stock holdings after earlier RSU grant

Key Terms

restricted stock units ("RSUs"), vest, annual meeting of stockholders

3 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

"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.

annual meeting of stockholders financial

"vest on the last business day immediately preceding the 2027 annual meeting of stockholders"

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/17/2026 - 04:23 PM Accepted by SEC EDGAR 06/17/2026 - 04:22 PM 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^*

Teekell Judson Gray

(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	73,281	D
Common Stock	06/16/2026		A		4,970(2)	A	$0	78,251	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)

FAQ

What insider transactions did MIAX director Judson Gray Teekell report?

Director Judson Gray Teekell reported two equity award acquisitions in MIAMI INTERNATIONAL HOLDINGS common stock. He received 4,970 fully vested RSUs on June 16, 2026, and 2,267 RSUs on June 15, 2026, which vest before the 2027 annual meeting, subject to continued service.

How many MIAX shares does Judson Gray Teekell hold after these Form 4 awards?

After the reported RSU grants, Judson Gray Teekell directly holds 78,251 shares of MIAMI INTERNATIONAL HOLDINGS common stock. This total reflects the impact of both June 15 and June 16, 2026 equity awards disclosed in the Form 4 filing.

Were the MIAX equity awards to Judson Gray Teekell open-market purchases?

No, the MIAX equity awards were not open-market purchases. Both transactions are coded “A” on the Form 4, indicating grants or awards of restricted stock units rather than discretionary buying or selling of shares in the open market.

What are the vesting terms of Judson Gray Teekell’s June 16, 2026 MIAX RSUs?

The June 16, 2026 MIAX award of 4,970 RSUs fully vested on the grant date. Each restricted stock unit represents the right to receive one share of MIAMI INTERNATIONAL HOLDINGS common stock, providing immediate equity ownership upon grant.

When do Judson Gray Teekell’s June 15, 2026 MIAX RSUs vest?

The June 15, 2026 award of 2,267 MIAX RSUs vests on the last business day immediately preceding the company’s 2027 annual meeting of stockholders, conditioned on Judson Gray Teekell’s continued service with MIAMI INTERNATIONAL HOLDINGS through that vesting date.

What type of securities were granted to MIAX director Judson Gray Teekell?

Judson Gray Teekell received restricted stock units tied to MIAMI INTERNATIONAL HOLDINGS common stock. Each RSU represents a right to receive one share of common stock, with one grant fully vested at issuance and another scheduled to vest before the 2027 annual meeting.