STOCK TITAN

Cees Vermaas (MIAX) receives RSU and option grants as CEO of TISEG

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

MIAMI INTERNATIONAL HOLDINGS, INC. reported that Cees Vermaas, CEO of TISEG, received new equity compensation in the form of restricted stock units (RSUs) and stock options. On June 16, 2026, he was granted 4,660 RSUs of common stock at no purchase price. These RSUs are scheduled to vest in three installments: 1,554 on June 16, 2027, 1,553 on June 16, 2028, and 1,553 on June 16, 2029, contingent on continued service.

On the same date, he also received a nonqualified stock option for 4,793 shares of common stock at an exercise price of $40.24 per share, expiring June 15, 2036. The option is set to vest in three tranches of 1,599, 1,597, and 1,597 shares on June 16, 2027, 2028, and 2029, respectively, also subject to continued service with the company or its subsidiaries.

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Insider Vermaas Cees
Role CEO of TISEG
Type Security Shares Price Value
Grant/Award Nonqualified Stock Option (Right to Buy) 4,793 $0.00 --
Grant/Award Common Stock 4,660 $0.00 --
Holdings After Transaction: Nonqualified Stock Option (Right to Buy) — 4,793 shares (Direct, null); Common Stock — 4,660 shares (Direct, null)
Footnotes (1)
  1. The amount represents restricted stock units ("RSUs") that vest as to 1,554 on June 16, 2027, 1,553 on June 16, 2028 and the remaining 1,553 on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through each applicable vesting date. 1,599 of the shares subject to this option will vest on June 16, 2027, 1,597 of the shares subject to this option will vest on June 16, 2028 and the remaining 1,597 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.
RSU grant size 4,660 shares Restricted stock units granted June 16, 2026
RSU vesting 2027 1,554 shares RSUs vesting on June 16, 2027
RSU vesting 2028 1,553 shares RSUs vesting on June 16, 2028
RSU vesting 2029 1,553 shares RSUs vesting on June 16, 2029
Option grant size 4,793 shares Nonqualified stock option granted June 16, 2026
Option exercise price $40.24/share Nonqualified stock option strike price
Option expiration June 15, 2036 Nonqualified stock option expiry date
Option vesting tranches 1,599 / 1,597 / 1,597 shares Option vesting on June 16, 2027, 2028, 2029
restricted stock units ("RSUs") financial
"The amount represents restricted stock units ("RSUs") that vest as to 1,554 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 financial
"Nonqualified Stock Option (Right to Buy) with an exercise price of 40.2400..."
exercise price financial
"conversion_or_exercise_price": "40.2400""
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.
vesting financial
"will vest on June 16, 2027, 1,597 of the shares subject to this option will vest on June 16, 2028..."
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.
expiration date financial
"expiration_date": "2036-06-15T00:00:00.000Z""
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.
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Learn about SEC filing dates
SEC Form 4
FORM 4UNITED 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*
Vermaas Cees

(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)
Director10% Owner
XOfficer (give title below)Other (specify below)
CEO of TISEG
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/16/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock06/16/2026A4,660(1)A$04,660D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Nonqualified Stock Option (Right to Buy)$40.2406/16/2026A4,793 (2)06/15/2036Common Stock4,793$04,793D
Explanation of Responses:
1. The amount represents restricted stock units ("RSUs") that vest as to 1,554 on June 16, 2027, 1,553 on June 16, 2028 and the remaining 1,553 on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through each applicable vesting date.
2. 1,599 of the shares subject to this option will vest on June 16, 2027, 1,597 of the shares subject to this option will vest on June 16, 2028 and the remaining 1,597 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-Fact06/18/2026
** Signature of Reporting PersonDate
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 insider Cees Vermaas receive in this Form 4 filing?

Cees Vermaas received new equity compensation consisting of 4,660 restricted stock units and a nonqualified stock option for 4,793 shares. Both awards are tied to continued service and vest over three years starting June 16, 2027.

How do the 4,660 RSUs granted to Cees Vermaas at MIAX vest?

The 4,660 RSUs vest in three annual tranches: 1,554 on June 16, 2027, 1,553 on June 16, 2028, and 1,553 on June 16, 2029. Each vesting date requires Cees Vermaas to remain in service with MIAX or its subsidiaries.

What are the key terms of the 4,793-share stock option granted by MIAX?

The nonqualified stock option covers 4,793 shares of MIAX common stock at a $40.24 exercise price and expires June 15, 2036. It vests in three installments on June 16, 2027, 2028, and 2029, conditioned on continued service with the company or its subsidiaries.

Is the MIAX Form 4 for Cees Vermaas a market purchase or sale of shares?

The Form 4 reflects equity awards, not market trades. Cees Vermaas acquired 4,660 RSUs and a 4,793-share stock option as compensation, both granted at no purchase price, with future vesting based on his continued service.

When do the MIAX equity awards to Cees Vermaas become fully vested?

Both the RSU and stock option awards become fully vested after the last vesting date on June 16, 2029. Vesting occurs in three annual tranches beginning June 16, 2027, assuming Cees Vermaas continues serving MIAX or its subsidiaries.