Miami International exec sells 11K shares at $42
EVP and CRO/CCO Edward Deitzel exercised 11,000 MIAX options at $12 and sold the resulting shares around $42 under a pre-set Rule 10b5-1 plan.
Rhea-AI Filing Summary
MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) reported that executive vice president and chief risk and compliance officer of MIAX Exchanges, Edward Deitzel, exercised stock options for 11,000 shares of common stock at an exercise price of $12.00 per share on September 3, 2026. The 11,000 resulting common shares were then sold the same day at a weighted average price of $42.21 per share, in trades executed between $42.00 and $42.32, pursuant to a previously established Rule 10b5-1 trading plan adopted on December 30, 2025. After this option exercise, Deitzel held 66,000 stock options directly, and the options exercised in this transaction were fully vested.
Positive
- None.
Negative
- None.
Insider Trade Summary 10b5-1
Exercise and Sale: 11,000 shares ($332K approx. pre-tax spread)
Exercise and Sale
3 txns
Insider
Deitzel Edward
Role
EVP, CRO, CCO MIAX Exchanges
Sold
11,000 shs ($464K)
Approx. gross sale proceeds
$464K
Approx. exercise cost
$132K
Approx. pre-tax spread
$332K
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Nonqualified Stock Option (Right to Buy) F1, F3 | 11,000 | $0.00 | $0.00 |
| Exercise | Common Stock F1 | 11,000 | $12.00 | $132K |
| Sale | Common Stock F1, F2 | 11,000 | $42.21 | $464K |
Holdings After Transaction:
Nonqualified Stock Option (Right to Buy) — 66,000 contracts (Direct);
Common Stock — 119,601 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 30, 2025.
- F2. This transaction was executed in multiple trades throughout the day at prices ranging from $42.00 to $42.32. 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: 11,000 shares
Option exercise price: $12.00 per share
Shares sold: 11,000 shares
+5 more
8 metrics
Options exercised
11,000 shares
Stock options for MIAX common stock exercised on September 3, 2026
Option exercise price
$12.00 per share
Exercise price for the 11,000 MIAX options exercised
Shares sold
11,000 shares
Common shares sold on September 3, 2026 after option exercise
Weighted average sale price
$42.21 per share
Weighted average price for the 11,000 MIAX shares sold
Sale price range
$42.00–$42.32 per share
Range of prices at which MIAX shares were sold that day
Options remaining after exercise
66,000 options
Directly held stock options following the reported exercise
Rule 10b5-1 plan adoption date
December 30, 2025
Date Deitzel adopted the trading plan used for these transactions
Option expiration date
July 31, 2029
Expiration date of the option series from which 11,000 options were exercised
Key Terms
Rule 10b5-1 Plan, weighted average sales price, Nonqualified Stock Option
3 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 30, 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.
weighted average sales price financial
"The price reported above reflects the weighted average sales price."
Nonqualified Stock Option financial
"The options are fully vested."
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.
FAQ
What did MIAX executive Edward Deitzel report on this Form 4 for MIAX?
He reported exercising 11,000 stock options for MIAX common stock at $12.00 per share on September 3, 2026, and selling the resulting 11,000 shares the same day at a weighted average price of $42.21 per share.
What was the exercise price of the MIAX options exercised by Deitzel?
The options exercised by Edward Deitzel had an exercise price of $12.00 per share. He exercised options covering 11,000 shares of MIAX common stock, which were fully vested at the time of exercise.
How many MIAX options does Edward Deitzel hold after this reported transaction?
After the reported option exercise on September 3, 2026, Edward Deitzel held 66,000 stock options directly, according to the Form 4 disclosure for MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX).
Was Deitzel’s MIAX trading activity conducted under a Rule 10b5-1 plan?
Yes. The Form 4 states that the transactions were effected pursuant to a previously established Rule 10b5-1 Plan adopted by Edward Deitzel on December 30, 2025, indicating the trades were pre-arranged under that plan.
What type of security did Deitzel exercise and what did it convert into?
He exercised a stock option covering 11,000 shares of MIAX common stock at an exercise price of $12.00 per share. The option exercise resulted in the acquisition of 11,000 shares of MIAX common stock, which were then sold the same day.
AI-generated analysis. How Rhea-AI works. Not financial advice.
