Cynthia Schwarzkopf (MIAX) receives MIH stock awards and 5,142-share option

Rhea-AI Filing Summary

MIAMI INTERNATIONAL HOLDINGS, INC. director Cynthia Schwarzkopf reported equity awards rather than market trades. She acquired 4,970 shares of common stock and 2,267 additional shares through stock awards at no cash price, and received a nonqualified stock option for 5,142 shares at an exercise price of $40.24 per share. After these grants, she directly holds 88,545 common shares and 5,142 options. Footnotes explain that some restricted stock units fully vested on the grant date, while others and the option vest through late 2026 and before the 2027 annual meeting, contingent on continued service.

Insights

Equity compensation analyst

Routine director equity awards, no open-market buying or selling.

Director Cynthia Schwarzkopf received stock-based compensation in the form of restricted stock units and a nonqualified stock option, all coded as acquisition grants. No open‑market purchases or sales are reported, so this filing reflects compensation structure rather than trading sentiment.

The option covers 5,142 shares of common stock at an exercise price of $40.24 and vests in tranches through late 2026, while RSUs vest either immediately or before the 2027 annual meeting, subject to continued service. Following the grants, she holds 88,545 common shares and 5,142 options directly, suggesting these are modest, ongoing awards rather than a large position change.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Schwarzkopf Cynthia

Role null

Type	Security	Shares	Price	Value
Grant/Award	Nonqualified Stock Option (Right to Buy)	5,142	$0.00	--
Grant/Award	Common Stock	4,970	$0.00	--
Grant/Award	Common Stock	2,267	$0.00	--

Holdings After Transaction: Nonqualified Stock Option (Right to Buy) — 5,142 shares (Direct, null); Common Stock — 88,545 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. 2,571 of the shares subject to this option will vest on June 30, 2026, 1,285 of the shares subject to this option will vest on September 30, 2026 and the remaining 1,286 of the shares subject to this option will vest on December 31, 2026, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through the applicable vesting date.

Key Figures

Common stock grant 1: 4,970 shares Common stock grant 2: 2,267 shares Option grant size: 5,142 shares +4 more

7 metrics

Common stock grant 1 4,970 shares Stock award on 2026-06-16 at $0.00 per share

Common stock grant 2 2,267 shares Stock award on 2026-06-15 at $0.00 per share

Option grant size 5,142 shares Nonqualified stock option granted 2026-06-16

Option exercise price $40.24 per share Exercise price for 5,142-share option

Shares after transactions 88,545 shares Common stock directly held after grants

Options after transactions 5,142 options Nonqualified options directly held after grant

Option vesting schedule 2,571 / 1,285 / 1,286 shares Vesting on Jun 30, Sep 30, Dec 31 2026

Key Terms

restricted stock units ("RSUs"), Nonqualified Stock Option, vesting, exercise price

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.

Nonqualified Stock Option financial

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

vesting financial

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

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

exercise price financial

"conversion_or_exercise_price: "40.2400" for the nonqualified stock option."

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.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/17/2026 - 04:39 PM Accepted by SEC EDGAR 06/17/2026 - 04:39 PM Learn about SEC filing dates

FAQ

What did MIAX director Cynthia Schwarzkopf report in this Form 4?

Cynthia Schwarzkopf reported equity awards, not open-market trades. She received common stock through restricted stock units and a nonqualified stock option grant, increasing her direct holdings in MIAMI INTERNATIONAL HOLDINGS, INC. while reflecting routine director compensation rather than discretionary buying or selling.

How many MIAX common shares did Cynthia Schwarzkopf acquire in these grants?

She acquired 4,970 shares of MIAX common stock on one grant date and 2,267 shares on another, both at a reported price of $0.00 per share, indicating stock awards. These shares arose from restricted stock units rather than cash purchases in the open market.

What are the terms of Cynthia Schwarzkopf’s MIAX stock option grant?

She received a nonqualified stock option for 5,142 shares of MIAX common stock at an exercise price of $40.24 per share. Footnotes state the option vests in three tranches across June 30, 2026, September 30, 2026, and December 31, 2026, conditioned on continued service.

How many MIAX shares does Cynthia Schwarzkopf hold after these transactions?

After the reported grants, she directly holds 88,545 shares of MIAX common stock and 5,142 option shares. These figures reflect her position following the equity awards disclosed, combining previously held stock with newly granted shares and options.

Do the MIAX Form 4 transactions indicate insider buying or selling in the market?

No, the transactions are coded as grants or awards, not market trades. The reported acquisitions stem from restricted stock units and a stock option grant, all at a transaction price of $0.00, rather than purchases or sales on an exchange.

How do the MIAX restricted stock units for Cynthia Schwarzkopf vest?

Footnotes explain that some restricted stock units fully vested on the grant date, delivering common shares immediately, while others vest on the business day before the 2027 annual meeting. Vesting is conditioned on her continued service to MIAMI INTERNATIONAL HOLDINGS, INC.

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^*

Schwarzkopf Cynthia

(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	83,575	D
Common Stock	06/16/2026		A		4,970(2)	A	$0	88,545	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
Nonqualified Stock Option (Right to Buy)	$40.24	06/16/2026		A		5,142		(3)	06/15/2036	Common Stock	5,142	$0	5,142	D

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.

3. 2,571 of the shares subject to this option will vest on June 30, 2026, 1,285 of the shares subject to this option will vest on September 30, 2026 and the remaining 1,286 of the shares subject to this option will vest on December 31, 2026, 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	06/17/2026
	** 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)