Miami International Holdings (MIAX) GC sells 44,445 shares via option exercise
Rhea-AI Filing Summary
MIAMI INTERNATIONAL HOLDINGS, INC. executive Barbara J. Comly, EVP, GC & Corporate Secretary, exercised 44,445 nonqualified stock options into common stock at an exercise price of $12.00 per share on August 4, 2026, and sold the resulting 44,445 common shares at a $45.69 weighted average price, with individual trade prices ranging from $45.09 to $46.78, in a sale in open market or private transactions. Following the exercise, she reported 88,889 nonqualified stock options remaining, which are fully vested and expire on May 28, 2028. These trades were effected pursuant to a previously established Rule 10b5-1 trading plan adopted on December 18, 2025.
Positive
- None.
Negative
- None.
Insider Trade Summary 10b5-1
Exercise and Sale: 44,445 shares ($1.50M approx. pre-tax spread)
Exercise and Sale
3 txns
Insider
Comly Barbara J.
Role
EVP, GC & Corporate Secretary
Sold
44,445 shs ($2.03M)
Approx. gross sale proceeds
$2.03M
Approx. exercise cost
$533K
Approx. pre-tax spread
$1.50M
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Nonqualified Stock Option (Right to Buy) F1, F3 | 44,445 | $0.00 | $0.00 |
| Exercise | Common Stock F1 | 44,445 | $12.00 | $533K |
| Sale | Common Stock F1, F2 | 44,445 | $45.69 | $2.03M |
Holdings After Transaction:
Nonqualified Stock Option (Right to Buy) — 88,889 shares (Direct);
Common Stock — 882,984 shares (Direct)
Footnotes (3)
- F1. This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 18, 2025.
- F2. This transaction was executed in multiple trades throughout the day at prices ranging from $45.09 to $46.78. The price reported above reflects the weighted average sales 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.
- F3. The options are fully vested.
Key Figures
Options exercised: 44,445 shares
Option exercise price: $12.00 per share
Shares sold: 44,445 shares
+5 more
8 metrics
Options exercised
44,445 shares
Nonqualified stock options exercised into common stock on August 4, 2026
Option exercise price
$12.00 per share
Exercise price of nonqualified stock options converted into common stock
Shares sold
44,445 shares
Common stock sold following option exercise on August 4, 2026
Weighted average sale price
$45.69 per share
Weighted average price for 44,445 MIAX shares sold
Sale price range
$45.09–$46.78 per share
Multiple trades throughout August 4, 2026
Remaining options
88,889 options
Nonqualified stock options reported remaining after the exercise
Option expiration date
May 28, 2028
Expiration date of the reported nonqualified stock options
Rule 10b5-1 plan adoption
December 18, 2025
Date Comly adopted the trading plan governing these transactions
Key Terms
Rule 10b5-1 Plan, Nonqualified Stock Option, weighted average sales price, derivative security
4 terms
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.
Nonqualified Stock Option financial
"security_title: Nonqualified Stock Option (Right to Buy)"
weighted average sales price financial
"price reported above reflects the weighted average sales price"
derivative security financial
"transaction code description: Exercise or conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
AI-generated analysis. How Rhea-AI works. Not financial advice.
FAQ
What insider transactions did MIAX executive Barbara J. Comly report?
Barbara J. Comly reported exercising 44,445 nonqualified stock options into MIAX common stock at $12.00 per share and selling the resulting 44,445 shares at a weighted average price of $45.69 on August 4, 2026, in open market or private transactions.
What was the exercise price and structure of Comly's MIAX stock options?
Comly exercised nonqualified stock options to buy 44,445 MIAX shares at an exercise price of $12.00 per share. The options are described as fully vested and, after this exercise, 88,889 options remain outstanding with an expiration date of May 28, 2028.
Were Barbara J. Comly’s MIAX trades made under a Rule 10b5-1 plan?
Yes. A footnote states the transactions were effected pursuant to a previously established Rule 10b5-1 Plan adopted by Barbara J. Comly on December 18, 2025, indicating they followed a pre-arranged trading schedule rather than discretionary timing.
How many MIAX stock options does Comly report remaining after these transactions?
After exercising options for 44,445 shares, Comly reported 88,889 nonqualified stock options remaining. These options are noted as fully vested and carry an expiration date of May 28, 2028, providing ongoing potential to acquire additional MIAX common stock.
What role does Barbara J. Comly hold at MIAX in this Form 4 filing?
Barbara J. Comly is identified as MIAX’s EVP, General Counsel & Corporate Secretary. The Form 4 reflects her position as an officer of the company in connection with exercising nonqualified stock options and selling MIAX common stock on August 4, 2026.