Vermaas Cees 4

4 · MIAMI INTERNATIONAL HOLDINGS, INC. · Filed Jun 18, 2026

AI-generated summary of this filing

Updated Jun 18, 2026

MIAX Insider Cees Vermaas Receives RSU and Option Grants

What Happened

Cees Vermaas (identified as CEO of TISEG) received two equity awards from Miami International Holdings, Inc. (MIAX) on 2026-06-16: 4,660 restricted stock units (RSUs) and a derivative option award covering 4,793 shares. Both awards were reported as granted at $0.00 (typical for compensation grants), so there was no cash purchase or sale.

Key Details

Transaction date(s): 2026-06-16. Form 4 filed: 2026-06-18 (filed within the typical 2-business-day window).
Grant details:
- RSUs: 4,660 RSUs granted (footnote F1). Vesting: 1,554 on 2027-06-16; 1,553 on 2028-06-16; 1,553 on 2029-06-16, subject to continued service.
- Option/derivative award: 4,793 shares (footnote F2). Vesting: 1,599 on 2027-06-16; 1,597 on 2028-06-16; 1,597 on 2029-06-16, subject to continued service.
Reported acquisition price: $0.00 (grant/award). No immediate cash value realized in the filing; market value depends on MIAX share price at vesting/exercise.
Shares owned after the reported transactions: not specified in the provided filing excerpt.
Transaction code: A = Grant/Award. The second entry is a derivative (option) award—not an exercised option or sale.

Context

These are compensation grants that vest over three years; they do not represent open-market purchases or sales. RSUs convert to shares at vesting (subject to service conditions); options must be exercised per their terms before becoming actual shares.
Such grants are routine for executive compensation and are not direct indicators of immediate buying or selling sentiment.

Form 4

Period: 2026-06-16

CEO of TISEG

Transactions

Award
Common Stock
[F1]
2026-06-16+4,660→ 4,660 total
Award
Nonqualified Stock Option (Right to Buy)
[F2]
2026-06-16+4,793→ 4,793 total
Exercise: $40.24Exp: 2036-06-15→ Common Stock (4,793 underlying)

Footnotes (2)

[F1]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.
[F2]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.

Signature

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

1 file