MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX)

Latest Insider Confidence Score

2026Q1

51.0
Bullish

Company insider confidence (by quarter)

2025Q3 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Stahl Murray Director 4,557,925 Oct 6, 2025
Horizon Kinetics Asset Management Llc 10% Owner 4,557,925 Oct 6, 2025
Gallagher Thomas P. CEO 750,000 Aug 19, 2025
Brown Shelly EVP, Chief Strategy Officer 311,699 Sep 11, 2025
Schafer Douglas M. JR EVP and CIO 300,000 Aug 19, 2025

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Mar 5, 2026 Mar 6, 2026 STAHL MURRAY Director Buy 62.5 +7,200 0.16% ✗ $310.2K
Mar 4, 2026 Mar 6, 2026 STAHL MURRAY Director Buy 62.5 +7,200 0.16% ✗ $312.3K
Mar 2, 2026 Mar 6, 2026 STAHL MURRAY Director Sell 17.5 -53,578 -1.15% ✗ $2.2M
Mar 4, 2026 Mar 5, 2026 STAHL MURRAY Director Buy 62.5 +7,200 0.15% ✗ $312.3K
Mar 2, 2026 Mar 4, 2026 STAHL MURRAY Director Sell 17.5 -121,054 -2.52% ✗ $5M
Feb 18, 2026 Feb 20, 2026 Schafer Douglas M. JR EVP and CIO Sell 37.5 -32,565 -7.59% ✗ $1.3M
Feb 18, 2026 Feb 20, 2026 Deitzel Edward EVP, CRO, CCO MIAX Exchanges Sell 42.5 -6,035 -4.91% ✗ $246.8K
Feb 18, 2026 Feb 20, 2026 Brown Shelly EVP, Chief Strategy Officer Sell 40.0 -19,902 -5.77% ✗ $813.8K
Feb 10, 2026 Feb 12, 2026 Schafer Douglas M. JR EVP and CIO Sell 37.5 -108,550 -20.18% ✗ $4.5M
Feb 10, 2026 Feb 12, 2026 Gallagher Thomas P. CEO Sell 37.5 -50,100 -8.55% ✗ $2.1M
Dec 23, 2025 Dec 29, 2025 Gallagher Thomas P. CEO Neutral 45.0 -2,000 -0.34% ✗ -
Dec 16, 2025 Dec 17, 2025 Brown Shelly EVP, Chief Strategy Officer Neutral 52.5 - 0.00% ✗ -
Dec 16, 2025 Dec 17, 2025 Emmons Lance CFO Neutral 52.5 - 0.00% ✗ -
Dec 12, 2025 Dec 15, 2025 STAHL MURRAY Director Buy 60.0 +2,439 0.05% ✗ $100K
Oct 3, 2025 Oct 6, 2025 STAHL MURRAY Director Buy 47.5 +2 0.00% ✗ $83.9
Sep 26, 2025 Sep 30, 2025 STAHL MURRAY Director Buy 47.5 +4 0.00% ✗ $167
Aug 28, 2025 Sep 30, 2025 STAHL MURRAY Director Buy 77.5 +34,470 0.76% ✗ $1.2M
Sep 11, 2025 Sep 15, 2025 Smollen John EVP Traded Products & Relation Sell 37.5 -52,054 -26.95% ✗ $1.9M
Sep 9, 2025 Sep 11, 2025 Deitzel Edward EVP, CRO, CCO MIAX Exchanges Sell 37.5 -38,090 -26.38% ✗ $1.4M
Sep 9, 2025 Sep 11, 2025 Jayabalan Harish EVP, CISO and CRO Sell 42.5 -1,980 -2.63% ✗ $73.9K
Sep 10, 2025 Sep 11, 2025 Brown Shelly EVP, Strat. Planning & BD Sell 40.0 -16,283 -4.96% ✗ $599.4K
Aug 26, 2025 Aug 28, 2025 Brown Shelly EVP, Strat. Planning & BD Sell 40.0 -11,047 -3.26% ✗ $374.5K
Aug 26, 2025 Aug 28, 2025 Gallagher Thomas P. CEO Sell 36.3 -192,220 -7.31% ✗ $6.5M
Aug 15, 2025 Aug 19, 2025 Stahlin Paul Director Neutral 52.5 - 0.00% ✗ -
Aug 15, 2025 Aug 19, 2025 Schafer Douglas M. JR EVP and CIO Neutral 52.5 - 0.00% ✗ -
Aug 15, 2025 Aug 19, 2025 Smollen John EVP Traded Products & Relation Neutral 52.5 - 0.00% ✗ -
Aug 15, 2025 Aug 19, 2025 Al-Bahar Talal Jassim Director Neutral 52.5 - 0.00% ✗ -
Aug 15, 2025 Aug 19, 2025 Beckelman John Director Neutral 52.5 - 0.00% ✗ -
Aug 15, 2025 Aug 19, 2025 Brown Shelly EVP, Strat. Planning & BD Neutral 52.5 - 0.00% ✗ -
Aug 15, 2025 Aug 19, 2025 BROWN DAVID A Director Neutral 52.5 - 0.00% ✗ -
Aug 15, 2025 Aug 19, 2025 Deitzel Edward EVP, CRO, CCO MIAX Exchanges Neutral 52.5 - 0.00% ✗ -
Aug 15, 2025 Aug 19, 2025 Jayabalan Harish EVP, CISO and CRO Neutral 52.5 - 0.00% ✗ -
Aug 15, 2025 Aug 19, 2025 Comly Barbara J. EVP, GC & Corporate Secretary Neutral 52.5 - 0.00% ✗ -
Aug 15, 2025 Aug 19, 2025 Eckert Kurt M. Director Neutral 52.5 - 0.00% ✗ -
Aug 15, 2025 Aug 19, 2025 Gallagher Thomas P. CEO Neutral 52.5 - 0.00% ✗ -
Aug 15, 2025 Aug 19, 2025 Teekell Judson Gray Director Neutral 52.5 - 0.00% ✗ -
Aug 15, 2025 Aug 19, 2025 Raymond Mark F. Director Neutral 52.5 - 0.00% ✗ -
Aug 15, 2025 Aug 19, 2025 Schwarzkopf Cynthia Director Neutral 52.5 - 0.00% ✗ -
Aug 15, 2025 Aug 18, 2025 Emmons Lance CFO Buy 90.0 +4 100.00% ✗ $125.8
Aug 13, 2025 Aug 15, 2025 Moore Lisa Director Buy 95.0 +5,500 100.00% ✗ $126.5K
Aug 13, 2025 Aug 15, 2025 Jayabalan Harish EVP, CISO and CRO Buy 95.0 +2,500 63.40% ✗ $57.5K
Aug 13, 2025 Aug 15, 2025 Stahlin Paul Director Buy 91.3 +1,000 100.00% ✗ $23K
Aug 13, 2025 Aug 15, 2025 Nazarali Jamil Director Buy 95.0 +2,500 100.00% ✗ $57.5K
Aug 13, 2025 Aug 15, 2025 Schafer Douglas M. JR EVP and CIO Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Aug 15, 2025 Comly Barbara J. EVP, GC & Corporate Secretary Sell 36.3 -288,075 -33.15% ✗ $6.6M
Aug 13, 2025 Aug 15, 2025 Vermaas Cees CEO Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Aug 15, 2025 Smollen John EVP Traded Products & Relation Buy 95.0 +5,000 224.62% ✗ $115K
Aug 13, 2025 Aug 15, 2025 Deitzel Edward EVP, CRO, CCO MIAX Exchanges Buy 60.0 +100 0.31% ✗ $2.3K
Aug 13, 2025 Aug 15, 2025 Gallagher Thomas P. CEO Buy 97.5 +12,000 100.00% ✗ $276K
Aug 13, 2025 Aug 15, 2025 Lozier Kenneth W. Director Buy 91.3 +1,000 100.00% ✗ $23K
Aug 13, 2025 Aug 15, 2025 Massad Mark I. Director Buy 95.0 +8,000 100.00% ✗ $184K
Aug 13, 2025 STAHL MURRAY Director Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Lozier Kenneth W. Director Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Stahlin Paul Director Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Emmons Lance CFO Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Teekell Judson Gray Director Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Beckelman John Director Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Schwarzkopf Cynthia Director Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Brown Shelly EVP, Strat. Planning & BD Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 BROWN DAVID A Director Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Moore Lisa Director Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Al-Bahar Talal Jassim Director Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Comly Barbara J. EVP, GC & Corporate Secretary Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Nazarali Jamil Director Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Gallagher Thomas P. CEO Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Raymond Mark F. Director Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Jayabalan Harish EVP, CISO and CRO Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Becker Lee Director Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Smollen John EVP Traded Products & Relation Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Vermaas Cees CEO Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Massad Mark I. Director Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Schafer Douglas M. JR EVP and CIO Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Deitzel Edward EVP, CRO, CCO MIAX Exchanges Neutral 52.5 - 0.00% ✗ -
Aug 13, 2025 Eckert Kurt M. Director Neutral 52.5 - 0.00% ✗ -