Miami International CEO sells 70K MIAX shares
MIAMI INTERNATIONAL HOLDINGS, INC.
Sentiment and the balance of points
Rhea-AI Sentiment reads the wording of the document, how positive or negative its language is on a 1 to 5 scale. The balance of points shown with the takes weighs what the document actually discloses, so the two can disagree, for example when a trial that missed its main goal is described in upbeat language.
Form Type
4
Rhea-AI Filing Summary
MIAMI INTERNATIONAL HOLDINGS, INC. Chairman & CEO Thomas P. Gallagher, through Gallagher Investments, LLC, exercised options for 70,000 shares of common stock at $12.00 per share and sold 70,000 shares at a weighted average of $42.36 on June 2, 2026.
The sales were made in open-market transactions under a previously established Rule 10b5-1 Plan adopted on December 29, 2025. Following these transactions, Gallagher Investments, LLC holds 1,723,275 shares of common stock indirectly controlled by Mr. Gallagher.
Insider Trade Summary 10b5-1
Exercise and Sale: 70,000 shares ($2.13M approx. pre-tax spread)
Exercise and Sale
3 txns
Insider
Gallagher Thomas P.
Role
Chairman & CEO
Sold
70,000 shs ($2.97M)
Approx. gross sale proceeds
$2.97M
Approx. exercise cost
$840K
Approx. pre-tax spread
$2.13M
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Nonqualified Stock Option (Right to Buy) | 70,000 | $0.00 | $0.00 |
| Exercise | Common Stock | 70,000 | $12.00 | $840K |
| Sale | Common Stock | 70,000 | $42.36 | $2.97M |
Holdings After Transaction:
Nonqualified Stock Option (Right to Buy) — 140,000 contracts (Indirect, By Gallagher Investments, LLC);
Common Stock — 1,723,275 shares (Indirect, By Gallagher Investments, LLC)
Footnotes (4)
- F1. This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 29, 2025.
- F2. Mr. Gallagher maintains beneficial ownership, including dispositive and voting control, over Gallagher Investments, LLC.
- F3. This transaction was executed in multiple trades throughout the day at prices ranging from $42.00 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.
- F4. The options are fully vested.
Key Figures
Shares sold: 70,000 shares
Weighted average sale price: $42.36 per share
Sale price range: $42.00–$45.73 per share
+5 more
8 metrics
Shares sold
70,000 shares
Open-market sale of common stock on June 2, 2026
Weighted average sale price
$42.36 per share
Common stock sales on June 2, 2026
Sale price range
$42.00–$45.73 per share
Price range for June 2, 2026 trades
Options exercised
70,000 options
Nonqualified stock options converted to common stock
Option exercise price
$12.00 per share
Conversion price for nonqualified stock options
Shares held after transactions
1,723,275 shares
Indirect holdings via Gallagher Investments, LLC after June 2, 2026
Rule 10b5-1 plan adoption date
December 29, 2025
Plan governing June 2, 2026 share sales
Option expiration date
August 2, 2026
Expiration of exercised nonqualified stock options
Key Terms
Rule 10b5-1 Plan, Nonqualified Stock Option (Right to Buy), open-market sale, beneficial ownership, +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 29, 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 (Right to Buy) financial
"Security title: Nonqualified Stock Option (Right to Buy) with an exercise price of $12.00 per share."
open-market sale financial
"Transaction action: open-market sale of 70,000 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.
beneficial ownership financial
"Mr. Gallagher maintains beneficial ownership, including dispositive and voting control, over Gallagher Investments, LLC."
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
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 transactions did MIAX Chairman & CEO Thomas P. Gallagher report?
Thomas P. Gallagher, via Gallagher Investments, LLC, reported exercising options for 70,000 MIAX common shares at $12.00 and selling 70,000 shares at a weighted average price of $42.36 on June 2, 2026, under a pre-established trading plan.
At what price did Thomas P. Gallagher exercise MIAX stock options?
Gallagher exercised 70,000 nonqualified stock options into MIAX common stock at a conversion price of $12.00 per share. These options were fully vested, and the exercise was paired with same-day open-market sales of the acquired shares.
What type of derivative security did Thomas P. Gallagher exercise in MIAX?
Gallagher exercised 70,000 nonqualified stock options (right to buy) in MIAX with an exercise price of $12.00 per share. These options were fully vested and were scheduled to expire on August 2, 2026, leading to the acquisition of 70,000 common shares.
AI-generated analysis. How Rhea-AI works. Not financial advice.
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