Thomas P. Gallagher

MIAX CEO Gallagher sold 70,000 shares at $42.36 (2026-06-02) via scheduled 10b5-1 plan; retains 1,723,275 shares post-transaction.

Thomas P. Gallagher, Chairman & CEO of MIAX, sold 70,000 shares at $42.36 on 2026-06-02 under a pre-arranged 10b5-1 trading plan adopted on 2025-12-29, meaning the transaction was scheduled rather than discretionary. At MIAX specifically, his prior five trades have shown mixed results: sales on 2026-05-05 and 2026-05-04 each posted negative 30-day and 90-day returns (-15.8% and -14.7% respectively), while earlier April sales showed initial gains that reversed into 90-day losses ranging from -7.0% to -7.7%. The company reported latest-quarter revenue of $369,690,000.00 and net income of $170,224,000.00, though full-year net income was negative. Gallagher retains 1,723,275 non-derivative shares post-transaction plus derivative holdings through Gallagher Investments, LLC.

Chairman & CEO Gallagher executes net 15.8K-share sell via same-day buy-then-sell; prior MIAX sales poorly timed as stock rose after each exit.

Thomas P. Gallagher, the Chairman and CEO of Miami International Holdings, executed a same-day purchase and sale of roughly 15,800 shares on May 5, 2026—buying at one price and immediately selling at a substantially higher price, a technical maneuver often used for tax or accounting purposes rather than a signal of market confidence. The concerning pattern is his track record in this stock: every prior sale he's made has been poorly timed, with the shares rising afterward each time, suggesting he has consistently misjudged exit points. The stock is currently trading modestly below its recent highs and has gained significantly over the past three months, yet the company remains unprofitable with negative earnings, adding friction to the case that he's selling from a position of strength. This combination—the mechanical nature of the transaction structure, a history of poor timing on exits, and an unprofitable underlying business—raises questions about what the CEO knows and doesn't know about near-term prospects.

Chairman & CEO Thomas Gallagher executes matched buy-sell pairs totaling $2.56M in MIAX stock on same day.

Thomas Gallagher, the Chairman and CEO of Miami International Holdings, executed a same-day matched buy-sell transaction involving identical share quantities—a pattern typical of equity collar arrangements or rebalancing maneuvers that don't necessarily signal conviction about the stock's direction. The sale at elevated prices relative to recent trading history occurred while the stock is trading below its recent highs, and the company is unprofitable with recent quarterly results showing significant losses despite strong revenue growth. This type of mechanical paired transaction lacks the clarity of true discretionary selling—Gallagher may be executing a pre-arranged portfolio management strategy rather than expressing bearish sentiment about MIAX's prospects. Without visibility into whether this trade was pre-planned or represents a spontaneous decision, the filing warrants monitoring but shouldn't be read as a clear negative signal from leadership.

CEO Thomas P. Gallagher sells 224.0K shares ($9.7M) in 3 separate transactions at MIAX; 31.6% reduction in holdings.

CEO Thomas P. Gallagher executed 3 separate sales totaling 224,025 shares for $9,729,692.00 on 2026-04-15, reducing his holdings from 709,988 shares to 485,963 shares (a -31.6% reduction). The sales occurred at prices of $43.36, $43.36, and $43.68, with a blended average of $43.43, while the current price stands at $45.17—implying the stock has appreciated since the sales. Against his own cross-ticker track record of a 100.00% 90-day win rate with average 90-day returns of +115.1% on buys, this sale represents a significant shift in activity pattern; however, no prior sales with measured timing outcomes are available in his MIAX-specific history to establish whether sells by this insider have historically been well-timed. The company is currently unprofitable (net income $-102,080,000.00 for the most recent full fiscal year) despite annual revenue growth of +19.6%, creating a context in which a large equity reduction by the CEO warrants investor attention to the company's path to profitability and working capital demands.

MIAX Chairman & CEO Gallagher bought 12,000 shares at $23.00; 9 other insiders also bought in past 14 days

Thomas P. Gallagher, Chairman & CEO of MIAMI INTERNATIONAL HOLDINGS, INC., purchased 12,000 shares at $23.00 on 2025-08-13, just two trading days after the company's recent listing. This represents an initial open-market position for Gallagher at the stock. The transaction occurs within a cluster pattern in which 9 other insiders also bought within the past 14 days, suggesting broad internal conviction across the leadership group at the company's recently-public valuation. Given the stock's current price of $31.12, the market has already moved substantially higher than the purchase price, though the stock is only 2 trading days into its public trading history and historical price baselines remain unavailable for context.