MIAMI International (MIAX) EVP sells 28K shares after option exercise
Filing Impact
Filing Sentiment
Form Type
4
Rhea-AI Filing Summary
MIAMI International Holdings EVP, GC & Corporate Secretary Barbara J. Comly reported an exercise-and-sell transaction in company common stock. On May 4, 2026, she exercised 28,000 nonqualified stock options at $12.00 per share and acquired the same number of common shares.
On the same date, she executed an open-market sale of 28,000 common shares at an average price of $47.26 per share, pursuant to a pre-established Rule 10b5-1 Plan adopted on December 18, 2025. Following these transactions, she directly holds 843,844 common shares and 84,000 nonqualified stock options that are reported as fully vested.
Positive
- None.
Negative
- None.
Insider Trade Summary 10b5-1
Net Seller: 28,000 shares ($1,323,280)
Net Sell
3 txns
Insider
Comly Barbara J.
Role
EVP, GC & Corporate Secretary
Sold
28,000 shs ($1.32M)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Nonqualified Stock Option (Right to Buy) | 28,000 | $0.00 | -- |
| Exercise | Common Stock | 28,000 | $12.00 | $336K |
| Sale | Common Stock | 28,000 | $47.26 | $1.32M |
Holdings After Transaction:
Nonqualified Stock Option (Right to Buy) — 84,000 shares (Direct, null);
Common Stock — 871,844 shares (Direct, null)
Footnotes (1)
- This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 18, 2025. The options are fully vested.
Key Figures
Shares sold: 28,000 shares
Sale price per share: $47.26 per share
Options exercised: 28,000 options
+5 more
8 metrics
Shares sold
28,000 shares
Open-market sale of common stock on May 4, 2026
Sale price per share
$47.26 per share
Average price for 28,000 common shares sold
Options exercised
28,000 options
Nonqualified stock options exercised into common shares
Option exercise price
$12.00 per share
Exercise price of nonqualified stock options
Shares held after
843,844 shares
Direct common stock holdings after transactions
Options outstanding after
84,000 options
Nonqualified stock options remaining and fully vested
Rule 10b5-1 plan adoption date
December 18, 2025
Date pre-arranged trading plan was adopted
Option expiration date
August 2, 2026
Expiration of exercised nonqualified stock option grant
Key Terms
Rule 10b5-1 Plan, Nonqualified Stock Option (Right to Buy), open-market sale, derivative security, +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"
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 (Right to Buy) financial
"security_title: Nonqualified Stock Option (Right to Buy) with an exercise price of $12.0000"
open-market sale financial
"transaction_action: open-market sale of 28,000 shares of Common Stock"
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.
fully vested financial
"footnote: The options are fully vested."
FAQ
What did MIAX executive Barbara J. Comly report in this Form 4 filing?
Barbara J. Comly reported exercising nonqualified stock options and selling common stock. She exercised 28,000 options for MIAX common shares, then sold 28,000 shares in an open-market transaction while retaining a sizeable remaining equity position in the company.
Was Barbara J. Comly’s MIAX stock sale made under a Rule 10b5-1 plan?
Yes. The filing states the transaction was effected under a pre-established Rule 10b5-1 Plan adopted on December 18, 2025. Such plans pre-schedule trades, indicating the timing of this sale was determined in advance rather than decided opportunistically.
What type of derivative security did Barbara J. Comly exercise in this MIAX filing?
She exercised a nonqualified stock option, described as a “Nonqualified Stock Option (Right to Buy).” This derivative gave her the right to purchase 28,000 MIAX common shares at a fixed $12.00 exercise price before its stated expiration date.