[Form 4] MIAMI INTERNATIONAL HOLDINGS, INC. Insider Trading Activity
Filing Impact
Filing Sentiment
Form Type
4
Rhea-AI Filing Summary
MIAMI INTERNATIONAL HOLDINGS, INC. executive Shelly Brown exercised and sold shares in a planned transaction. On April 8, 2026, Brown exercised nonqualified stock options to acquire 16,434 shares of common stock at $12.00 per share and immediately sold 16,434 shares in an open-market transaction at a weighted average price of $42.08 per share. The filing notes the options were fully vested and the trades were executed under a previously established Rule 10b5-1 Plan adopted on December 22, 2025. After these transactions, Brown directly held 325,047 shares of common stock.
Positive
- None.
Negative
- None.
Insider Trade Summary 10b5-1
Net Seller: 16,434 shares ($691,543)
Net Sell
3 txns
Insider
Brown Shelly
Role
EVP, Chief Strategy Officer
Sold
16,434 shs ($692K)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Nonqualified Stock Option (Right to Buy) | 16,434 | $0.00 | -- |
| Exercise | Common Stock | 16,434 | $12.00 | $197K |
| Sale | Common Stock | 16,434 | $42.08 | $692K |
Holdings After Transaction:
Nonqualified Stock Option (Right to Buy) — 48,000 shares (Direct);
Common Stock — 341,481 shares (Direct)
Footnotes (1)
- This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the reporting person on December 22, 2025. This transaction was executed in multiple trades throughout the day at prices ranging from $42.00 to $42.26. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. The options are fully vested.
Key Figures
Options exercised: 16,434 shares
Exercise price: $12.00 per share
Shares sold: 16,434 shares
+4 more
7 metrics
Options exercised
16,434 shares
Nonqualified stock options exercised on April 8, 2026
Exercise price
$12.00 per share
Strike price of nonqualified stock options
Shares sold
16,434 shares
Common stock sold in open-market transaction
Weighted average sale price
$42.08 per share
Sales executed between $42.00 and $42.26
Post-transaction holdings
325,047 shares
Common stock directly owned after April 8, 2026
Option expiration date
August 2, 2026
Expiration of exercised nonqualified stock options
Rule 10b5-1 plan adoption
December 22, 2025
Date trading plan governing the sale was adopted
Key Terms
Nonqualified Stock Option, Rule 10b5-1 Plan, weighted average sale price, open-market sale, +1 more
5 terms
Nonqualified Stock Option financial
"security_title: "Nonqualified Stock Option (Right to Buy)""
Rule 10b5-1 Plan regulatory
"transaction was effected pursuant to a previously established Rule 10b5-1 Plan"
A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.
weighted average sale price financial
"The price reported above reflects the weighted average sale price."
open-market sale financial
"transaction_action: "open-market sale""
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
fully vested financial
"The options are fully vested."
