Form 4: CEO Thomas Gallagher Executes Stock Options and Sale
Statement of Changes in Beneficial Ownership
Miami International Holdings CEO Thomas Gallagher exercised options and sold shares via a pre-arranged 10b5-1 plan.
Summary
- Chairman and CEO Thomas P. Gallagher exercised 70,001 stock options at a strike price of $12.00 per share.
- Following the exercise, a total of 224,025 shares were sold on April 15, 2026.
- Sales were executed at weighted average prices of $43.36 and $43.68 per share.
- Transactions were conducted through Gallagher Investments, LLC and direct holdings, pursuant to a Rule 10b5-1 trading plan adopted on December 29, 2025.
Sentiment
Score: 5
Explanation: StockSavvy.ai views this as a neutral event; while it is an insider sale, the use of a pre-planned 10b5-1 structure is a standard, non-discretionary financial management activity.
Positives
- The transactions were executed under a pre-established Rule 10b5-1 plan, indicating a systematic approach to liquidity rather than reactive selling.
- The CEO maintains a significant remaining beneficial ownership stake in the company.
Negatives
- The transaction represents a divestment of shares by the company's top executive.
Risks
- Future sales by the CEO could influence market sentiment regarding the company's valuation.
Future Outlook
No specific forward-looking guidance regarding company operations was provided in this filing.
Management Comments
- The transactions were effected pursuant to a previously established Rule 10b5-1 Plan.
Industry Context
StockSavvy.ai notes that insider selling via 10b5-1 plans is a standard practice for executives to manage personal liquidity and diversify assets, typically carrying less negative signaling than unscheduled open-market sales.
Comparison to Industry Standards
- The use of Rule 10b5-1 plans is the industry standard for corporate executives to avoid allegations of insider trading while liquidating equity positions.
Related Party Transactions
- Transactions were conducted through Gallagher Investments, LLC, an entity over which the reporting person maintains voting and dispositive control.
Stakeholder Impact
- Shareholders should note the reduction in the CEO's direct and indirect beneficial ownership.
Next Steps
- Continued monitoring of future Form 4 filings for additional transactions under the existing 10b5-1 plan.
Key Dates
| Date | Description |
|---|---|
| 2025-12-29 | Date the Rule 10b5-1 trading plan was adopted. |
| 2026-04-15 | Date of the earliest reported transactions (option exercise and share sales). |
| 2026-04-17 | Date of filing. |
| 2026-08-02 | Expiration date of the remaining nonqualified stock options. |
Keywords
MIAX, Insider Trading, Form 4, Thomas Gallagher, Miami International Holdings, Stock Options
Disclaimer:The information provided here is for general informational purposes only and does not constitute financial advice, recommendation, or endorsement of any kind. It may contain errors or omissions. You should not rely on this information to make financial decisions. Always seek the advice of a qualified financial professional before making any investment or financial decisions. Use of this information is at your own risk.