Miami International Holdings (NYSE: MIAX) CEO exercises options and sells 70,000 shares
Filing Impact
Filing Sentiment
Form Type
4
Rhea-AI Filing Summary
Miami International Holdings, Inc. Chairman & CEO Thomas P. Gallagher, through Gallagher Investments, LLC, exercised nonqualified stock options to acquire 70,000 shares of common stock at an exercise price of $12.00 per share and sold 70,000 shares in open-market transactions at a weighted average price of $42.52 per share, within a range of $42.00 to $43.49. The sale was effected under a previously established Rule 10b5-1 Plan, and following these transactions, Gallagher Investments, LLC held 1,723,275 shares of common stock indirectly beneficially owned by Mr. Gallagher. The options exercised were fully vested and this option grant now has no remaining balance.
Positive
- None.
Negative
- None.
Insider Trade Summary 10b5-1
Net Seller: 70,000 shares ($2,976,400)
Net Sell
3 txns
Insider
Gallagher Thomas P.
Role
Chairman & CEO
Sold
70,000 shs ($2.98M)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Nonqualified Stock Option (Right to Buy) | 70,000 | $0.00 | -- |
| Exercise | Common Stock | 70,000 | $12.00 | $840K |
| Sale | Common Stock | 70,000 | $42.52 | $2.98M |
Holdings After Transaction:
Nonqualified Stock Option (Right to Buy) — 0 shares (Indirect, By Gallagher Investments, LLC);
Common Stock — 1,793,275 shares (Indirect, By Gallagher Investments, LLC)
Footnotes (1)
- This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 29, 2025. Mr. Gallagher maintains beneficial ownership, including dispositive and voting control, over Gallagher Investments, LLC. This transaction was executed in multiple trades throughout the day at prices ranging from $42.00 to $43.49. 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. The options are fully vested.
Key Figures
Shares sold: 70,000 shares
Weighted average sale price: $42.52 per share
Shares acquired via option exercise: 70,000 shares
+4 more
7 metrics
Shares sold
70,000 shares
Open-market sale of common stock on July 13, 2026
Weighted average sale price
$42.52 per share
Average price for 70,000 shares sold within a $42.00–$43.49 range
Shares acquired via option exercise
70,000 shares
Common stock obtained through exercise of nonqualified stock options
Option exercise price
$12.00 per share
Strike price of nonqualified stock options exercised for 70,000 shares
Indirect holdings after transactions
1,723,275 shares
Common stock indirectly held through Gallagher Investments, LLC following transactions
Option expiration date
2026-08-02
Expiration date of the nonqualified stock option that was exercised
Sale price range
$42.00–$43.49 per share
Range of prices across multiple trades for the 70,000 shares sold
Key Terms
Rule 10b5-1 Plan, Nonqualified Stock Option (Right to Buy), beneficial ownership, weighted average sales price
4 terms
Rule 10b5-1 Plan regulatory
"This 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 (Right to Buy) financial
"security_title: Nonqualified Stock Option (Right to Buy)"
beneficial ownership financial
"Mr. Gallagher maintains beneficial ownership, including dispositive and voting control"
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.
weighted average sales price financial
"The price reported above reflects the weighted average sales price"
FAQ
What did MIAX Chairman & CEO Thomas P. Gallagher report in this Form 4 transaction?
Thomas P. Gallagher reported exercising options for 70,000 shares of MIAX common stock at $12.00 per share and selling 70,000 shares in open-market trades at a weighted average price of $42.52 per share on July 13, 2026.
Was the MIAX (MIAX) insider sale by Thomas P. Gallagher pre-planned?
Yes. The 70,000-share sale of MIAX common stock was executed under a previously established Rule 10b5-1 Plan adopted by Thomas P. Gallagher on December 29, 2025, indicating the trades were pre-scheduled rather than discretionary.
What is Thomas P. Gallagher’s remaining indirect ownership in MIAX after these transactions?
After the reported transactions, Gallagher Investments, LLC held 1,723,275 shares of MIAX common stock, indirectly beneficially owned by Thomas P. Gallagher, who maintains voting and dispositive control over that entity according to the disclosure footnotes.
What type of derivative security did Thomas P. Gallagher exercise in this MIAX Form 4?
He exercised a Nonqualified Stock Option (Right to Buy) for 70,000 underlying shares of MIAX common stock at an exercise price of $12.00 per share. The options were fully vested and had an expiration date of August 2, 2026.