MIAX executive sells 28,000 shares after option exercise
MIAMI INTERNATIONAL HOLDINGS, INC. executive Barbara J. Comly, EVP, General Counsel and Corporate Secretary, reported an exercise-and-sale transaction in company common stock.
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Form Type
4
Rhea-AI Filing Summary
MIAMI INTERNATIONAL HOLDINGS, INC. executive Barbara J. Comly, EVP, General Counsel and Corporate Secretary, reported an exercise-and-sale transaction in company common stock. On 2026-06-02, she exercised nonqualified stock options for 28,000 shares at $12.00 per share and sold 28,000 shares in an open-market transaction at a weighted-average price of $42.85 per share. Following the sale, she directly held 843,844 common shares. The stock sale was carried out under a previously established Rule 10b5-1 trading plan adopted on December 18, 2025.
Insider Trade Summary 10b5-1
Exercise and Sale: 28,000 shares ($864K approx. pre-tax spread)
Exercise and Sale
3 txns
Insider
Comly Barbara J.
Role
EVP, GC & Corporate Secretary
Sold
28,000 shs ($1.20M)
Approx. gross sale proceeds
$1.20M
Approx. exercise cost
$336K
Approx. pre-tax spread
$864K
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Nonqualified Stock Option (Right to Buy) | 28,000 | $0.00 | $0.00 |
| Exercise | Common Stock | 28,000 | $12.00 | $336K |
| Sale | Common Stock | 28,000 | $42.85 | $1.20M |
Holdings After Transaction:
Nonqualified Stock Option (Right to Buy) — 56,000 contracts (Direct);
Common Stock — 843,844 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 $41.31 to $45.73. 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
Shares sold: 28,000 shares
Sale price (weighted average): $42.85 per share
Exercise price: $12.00 per share
+4 more
7 metrics
Shares sold
28,000 shares
Open-market sale of common stock on June 2, 2026
Sale price (weighted average)
$42.85 per share
Weighted-average price for 28,000 shares sold
Exercise price
$12.00 per share
Nonqualified stock options exercised for 28,000 shares
Shares held after transaction
843,844 shares
Direct MIAX common stock holdings after June 2, 2026
Options remaining
56,000 derivative securities
Nonqualified stock options total following the exercise
Net share change
-28,000 shares
Net selling direction from transaction summary
Option expiration
August 2, 2026
Expiration date of the nonqualified stock option grant
Key Terms
Rule 10b5-1 Plan, Nonqualified Stock Option, weighted average sales price, open-market sale, +1 more
5 terms
Rule 10b5-1 Plan regulatory
"This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 18, 2025."
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
"Nonqualified Stock Option (Right to Buy)"
A nonqualified stock option (NQSO) is a company grant that gives an individual the right to buy shares at a set price but does not meet special tax rules for incentive stock options; when exercised the difference between the market price and the exercise price is treated as ordinary income for the recipient and as a tax-deductible expense for the company. It matters to investors because NQSOs affect an employee’s after-tax proceeds, the company’s reported expenses, and potential share dilution—think of it like a cash bonus that converts into stock but is taxed as regular pay when you take it.
weighted average sales price financial
"The price reported above reflects the weighted average sales 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.
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.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What insider transaction did MIAX executive Barbara J. Comly report?
Barbara J. Comly reported an exercise-and-sale in MIAX common stock. She exercised 28,000 nonqualified stock options at $12.00 per share and sold 28,000 shares in an open-market transaction at a weighted-average price of $42.85 per share.
Were Barbara J. Comly’s MIAX stock sales under a Rule 10b5-1 plan?
Yes. The filing states the stock sale was effected under a previously established Rule 10b5-1 trading plan. That plan was adopted by Barbara J. Comly on December 18, 2025, indicating the transactions were pre-arranged rather than opportunistic.
What MIAX stock options did Barbara J. Comly exercise in this transaction?
She exercised 28,000 nonqualified stock options to acquire MIAX common shares at a conversion price of $12.00 per share. The derivative position is described as a nonqualified stock option with an expiration date of August 2, 2026, and the options are fully vested.
How many MIAX stock options remain after Barbara J. Comly’s exercise?
For the reported nonqualified stock option, the entry shows 56,000 derivative securities remaining after the exercise. This figure is listed as the total derivative shares following the transaction, giving context to the size of the exercised portion relative to that option grant.
AI-generated analysis. How Rhea-AI works. Not financial advice.
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