Harish Jayabalan Exercises Options at Miami International Holdings Inc (MIAX) — SEC Form 4, Sep 29, 2026

SEC Form 4 · No Market Transaction

Option Exercise

Derivative exercise — no open market transaction.

Reporting Owner

Harish Jayabalan

EVP

TXN 2026-09-25 · FILED 2026-09-29

Equity Position 86.4K sh 78,065 → 86,398

Equity Change +10.7% shares held after vs before

Filing Lag 2 business days within 2-day SEC deadline

Form 4 · Statement of Changes in Beneficial Ownership

Miami International Holdings Inc

MIAX CIK 0001438472

Reporting Owner

Name	Relationship
Harish Jayabalan CIK 0002080538	EVP

Harish Jayabalan at Miami International Holdings Inc Full insider history

Bought (12 mo) —

Sold (12 mo) $2,562,017

More from this insider at Miami International Holdings Inc

Non-Derivative Securities Transactions

Title	Date	Type	Shares	Price	Net Total	Post-Txn	Ownership
Common Stock	2026-09-25	M - Exercise	8,333 A	$12.00	+$99,996	86,398	Direct

Derivative Securities Transactions

Title	Strike	Date	Type	Shares	Price	Expiration	Underlying	Ownership
Incentive Stock Option (Right to Buy)F1	$12.00	2026-09-25	M - Exercise	8,333 D	$0.00	2027-10-12	8,333 Common Stock	Direct

Footnotes (1)

5%+ Holders · 13D/G 4 filers

Latest Schedule 13D/G per filer; stakes the filer reported closed are left out.

Other insiders at Miami International Holdings Inc

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