Massad Mark I. 4

What Happened

• Mark I. Massad, a director of Miami International Holdings, Inc. (MIAX), received two restricted stock unit (RSU) awards: 2,267 RSUs granted on 2026-06-15 that vested immediately and 4,970 RSUs granted on 2026-06-16 that vest later. Each RSU represents the right to one share of common stock; the awards have a reported acquisition price of $0 (i.e., they are compensation grants, not purchases).

Key Details

• Transaction codes: A = Award/Grant.
• Dates and amounts: 2,267 RSUs on 2026-06-15 (vested on grant); 4,970 RSUs on 2026-06-16 (future vesting).
• Price/value reported: $0 per RSU (compensation grant).
• Shares owned after transaction: Not specified in the provided filing excerpt.
• Footnotes: F1 — the 2,267 RSUs fully vested on the grant date. F2 — the 4,970 RSUs vest on the last business day immediately preceding the 2027 annual meeting, subject to continued service.
• Filing timeliness: Report filed 2026-06-17 for transactions on 2026-06-15 and 2026-06-16 (filed within the Form 4 filing window).

Context

• RSU awards are compensation and not open-market purchases or sales; immediate vesting means the insider became entitled to shares on the grant date, while the second tranche remains subject to service-based vesting. These filings document the awards but do not by themselves indicate the insider’s market view.