MIAX
Miami International Holdings, Inc. $42.25+0.95 (+2.30%)Prev Close$41.30·MCap$4.10B·P/E24.04·Vol666.2K·Yield—
▲
Buys (12M)
13
$2.44M
▼
Sells (12M)
43
$54.09M
◆
Net Activity
Net Seller
$51.65M
●
Active Insiders
21
last 12 mo
Over the past 12 months, insider activity at Miami International Holdings, Inc. (MIAX) has been dominated by selling, with 13 insider purchases totaling $2.44M and 43 insider sales totaling $54.09M. The most recent insider transaction was by Gallagher Thomas P. (director, officer: Chairman & CEO), who sold $2.98M worth of shares on Jul 14, 2026. Miami International Holdings, Inc. operates in the Financial Services sector, within the Financial - Capital Markets industry, with a market cap of $4.10B.
MIAX Insider Trading Activity
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Jul 14, 2026 | Gallagher Thomas P. | director, officer: Chairman & CEO | Sell | 70,000 | $42.52 | $2.98M | 1,723,275 |
| Jul 14, 2026 | Comly Barbara J. | officer: EVP, GC & Corporate Secretary | Sell | 28,000 | $41.98 | $1.18M | 882,984 |
| Jul 7, 2026 | Comly Barbara J. | officer: EVP, GC & Corporate Secretary | Sell | 28,000 | $41.22 | $1.15M | 882,984 |
| Jul 7, 2026 | Schafer Douglas M. JR | officer: EVP and CIO | Sell | 48,000 | $41.22 | $1.98M | 387,414 |
| Jul 7, 2026 | Brown Shelly | officer: EVP, Chief Strategy Officer | Sell | 16,000 | $42.13 | $674.1K | 353,990 |
| Jul 7, 2026 | Gallagher Thomas P. | director, officer: Chairman & CEO | Sell | 70,000 | $42.16 | $2.95M | 1,723,275 |
| Jul 7, 2026 | Deitzel Edward | officer: EVP, CRO, CCO MIAX Exchanges | Sell | 11,000 | $42.04 | $462.4K | 119,601 |
| Jul 7, 2026 | Jayabalan Harish | officer: EVP, CISO and CRO | Sell | 20,000 | $42.12 | $842.4K | 78,065 |
| Jul 7, 2026 | Eckert Kurt M. | director | Sell | 5,250 | $39.35 | $206.6K | 149,612 |
| Jul 7, 2026 | Teekell Judson Gray | director | Sell | 3,000 | $40.00 | $120.0K | 75,251 |
| Jun 17, 2026 | Brown Shelly | officer: EVP, Chief Strategy Officer | Sell | 4,714 | $44.23 | $208.5K | 316,714 |
| Jun 12, 2026 | Schwarzkopf Cynthia | director | Sell | 19,500 | $41.73 | $813.7K | 81,308 |
| Jun 10, 2026 | Jayabalan Harish | officer: EVP, CISO and CRO | Sell | 20,000 | $40.08 | $801.6K | 73,405 |
| Jun 4, 2026 | Eckert Kurt M. | director | Sell | 5,250 | $42.76 | $224.5K | 142,375 |
| Jun 4, 2026 | Deitzel Edward | officer: EVP, CRO, CCO MIAX Exchanges | Sell | 11,000 | $42.16 | $463.8K | 116,221 |
| Jun 4, 2026 | Brown Shelly | officer: EVP, Chief Strategy Officer | Sell | 16,000 | $42.12 | $673.9K | 325,047 |
| Jun 4, 2026 | Comly Barbara J. | officer: EVP, GC & Corporate Secretary | Sell | 28,000 | $42.85 | $1.20M | 843,844 |
| Jun 4, 2026 | Gallagher Thomas P. | director, officer: Chairman & CEO | Sell | 70,000 | $42.36 | $2.97M | 1,723,275 |
| Jun 4, 2026 | Teekell Judson Gray | director | Sell | 3,000 | $42.78 | $128.3K | 71,014 |
| Jun 4, 2026 | Schafer Douglas M. JR | officer: EVP and CIO | Sell | 48,000 | $42.84 | $2.06M | 396,681 |
| May 18, 2026 | Emmons Lance | officer: EVP and CFO | Sell | 35,000 | $56.36 | $1.97M | 84,262-29% |
| May 7, 2026 | Gallagher Thomas P. | director, officer: Chairman & CEO | Sell | 15,771 | $47.92 | $755.7K | 1,723,275 |
| May 5, 2026 | Brown Shelly | officer: EVP, Chief Strategy Officer | Sell | 16,000 | $47.28 | $756.5K | 325,047 |
| May 5, 2026 | Teekell Judson Gray | director | Sell | 3,000 | $47.30 | $141.9K | 56,338 |
| May 5, 2026 | Comly Barbara J. | officer: EVP, GC & Corporate Secretary | Sell | 28,000 | $47.26 | $1.32M | 843,844 |
| May 5, 2026 | Schafer Douglas M. JR | officer: EVP and CIO | Sell | 48,000 | $47.25 | $2.27M | 396,681 |
| May 5, 2026 | Eckert Kurt M. | director | Sell | 5,625 | $47.29 | $266.0K | 142,375 |
| May 5, 2026 | Gallagher Thomas P. | director, officer: Chairman & CEO | Sell | 54,229 | $47.26 | $2.56M | 1,723,275 |
| May 5, 2026 | Deitzel Edward | officer: EVP, CRO, CCO MIAX Exchanges | Sell | 11,000 | $47.28 | $520.1K | 116,221 |
| Apr 17, 2026 | Gallagher Thomas P. | director, officer: Chairman & CEO | Sell | 224,025 | $43.43 | $9.73M | 1,827,399 |
| Apr 17, 2026 | Comly Barbara J. | officer: EVP, GC & Corporate Secretary | Sell | 29,667 | $43.64 | $1.29M | 843,844 |
| Apr 9, 2026 | Brown Shelly | officer: EVP, Chief Strategy Officer | Sell | 16,434 | $42.08 | $691.5K | 325,047 |
| Apr 9, 2026 | Deitzel Edward | officer: EVP, CRO, CCO MIAX Exchanges | Sell | 11,573 | $42.01 | $486.2K | 116,221 |
| Apr 8, 2026 | Brown Shelly | officer: EVP, Chief Strategy Officer | Sell | 3,257 | $41.52 | $135.2K | 325,047 |
| Apr 3, 2026 | Teekell Judson Gray | director | Sell | 2,700 | $40.00 | $108.0K | 59,338 |
| Mar 26, 2026 | Teekell Judson Gray | director | Sell | 300 | $40.00 | $12.0K | 62,038 |
| Mar 24, 2026 | Brown Shelly | officer: EVP, Chief Strategy Officer | Sell | 25,932 | $39.33 | $1.02M | 299,197 |
| Mar 20, 2026 | Eckert Kurt M. | director | Sell | 37,917 | $39.00 | $1.48M | 142,375 |
| Mar 18, 2026 | Schafer Douglas M. JR | officer: EVP and CIO | Sell | 48,000 | $39.74 | $1.91M | 396,681 |
| Mar 6, 2026 | STAHL MURRAY | director | Buy | 7,200 | $43.08 | $310.2K | 4,633,842 |
| Mar 6, 2026 | STAHL MURRAY | director | Sell | 53,578 | $40.92 | $2.19M | 4,619,442 |
| Feb 18, 2026 | Brown Shelly | EVP, Chief Strategy Officer | Sell | 19,902 | $40.89 | $813.8K | 0 |
| Feb 18, 2026 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | Sell | 6,035 | $40.89 | $246.8K | 0 |
| Feb 18, 2026 | Schafer Douglas M. JR | EVP and CIO | Sell | 32,565 | $40.89 | $1.33M | 0 |
| Dec 15, 2025 | STAHL MURRAY | Director | Buy | 2,439 | $41.00 | $100.0K | 4,560,364 |
| Oct 6, 2025 | STAHL MURRAY | Director | Buy | 2 | $41.97 | $83.94 | 4,557,925 |
| Sep 30, 2025 | STAHL MURRAY | Director | Buy | 34,474 | $36.10 | $1.24M | 4,557,923 |
| Aug 18, 2025 | Emmons Lance | EVP and CFO | Buy | 4 | $31.44 | $125.76 | 4 |
| Aug 15, 2025 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | Buy | 100 | $23.00 | $2.3K | 32,193 |
| Aug 15, 2025 | Gallagher Thomas P. | Chairman & CEO | Buy | 12,000 | $23.00 | $276.0K | 12,000 |
Showing 1–50 of 56
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MIAX Insider Buying Activity
The following table shows recent insider purchases of Miami International Holdings, Inc. (MIAX) stock reported via SEC Form 4 filings.
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Mar 6, 2026 | STAHL MURRAY | director | Buy | 7,200 | $43.08 | $310.2K | 4,633,842 |
| Dec 15, 2025 | STAHL MURRAY | Director | Buy | 2,439 | $41.00 | $100.0K | 4,560,364 |
| Oct 6, 2025 | STAHL MURRAY | Director | Buy | 2 | $41.97 | $83.94 | 4,557,925 |
| Sep 30, 2025 | STAHL MURRAY | Director | Buy | 34,474 | $36.10 | $1.24M | 4,557,923 |
| Aug 18, 2025 | Emmons Lance | EVP and CFO | Buy | 4 | $31.44 | $125.76 | 4 |
| Aug 15, 2025 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | Buy | 100 | $23.00 | $2.3K | 32,193 |
| Aug 15, 2025 | Gallagher Thomas P. | Chairman & CEO | Buy | 12,000 | $23.00 | $276.0K | 12,000 |
MIAX Insider Selling Activity
The following table shows recent insider sales of Miami International Holdings, Inc. (MIAX) stock reported via SEC Form 4 filings.
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Jul 14, 2026 | Gallagher Thomas P. | director, officer: Chairman & CEO | Sell | 70,000 | $42.52 | $2.98M | 1,723,275 |
| Jul 14, 2026 | Comly Barbara J. | officer: EVP, GC & Corporate Secretary | Sell | 28,000 | $41.98 | $1.18M | 882,984 |
| Jul 7, 2026 | Comly Barbara J. | officer: EVP, GC & Corporate Secretary | Sell | 28,000 | $41.22 | $1.15M | 882,984 |
| Jul 7, 2026 | Schafer Douglas M. JR | officer: EVP and CIO | Sell | 48,000 | $41.22 | $1.98M | 387,414 |
| Jul 7, 2026 | Brown Shelly | officer: EVP, Chief Strategy Officer | Sell | 16,000 | $42.13 | $674.1K | 353,990 |
| Jul 7, 2026 | Gallagher Thomas P. | director, officer: Chairman & CEO | Sell | 70,000 | $42.16 | $2.95M | 1,723,275 |
| Jul 7, 2026 | Deitzel Edward | officer: EVP, CRO, CCO MIAX Exchanges | Sell | 11,000 | $42.04 | $462.4K | 119,601 |
| Jul 7, 2026 | Jayabalan Harish | officer: EVP, CISO and CRO | Sell | 20,000 | $42.12 | $842.4K | 78,065 |
| Jul 7, 2026 | Eckert Kurt M. | director | Sell | 5,250 | $39.35 | $206.6K | 149,612 |
| Jul 7, 2026 | Teekell Judson Gray | director | Sell | 3,000 | $40.00 | $120.0K | 75,251 |
| Jun 17, 2026 | Brown Shelly | officer: EVP, Chief Strategy Officer | Sell | 4,714 | $44.23 | $208.5K | 316,714 |
| Jun 12, 2026 | Schwarzkopf Cynthia | director | Sell | 19,500 | $41.73 | $813.7K | 81,308 |
| Jun 10, 2026 | Jayabalan Harish | officer: EVP, CISO and CRO | Sell | 20,000 | $40.08 | $801.6K | 73,405 |
| Jun 4, 2026 | Eckert Kurt M. | director | Sell | 5,250 | $42.76 | $224.5K | 142,375 |
| Jun 4, 2026 | Deitzel Edward | officer: EVP, CRO, CCO MIAX Exchanges | Sell | 11,000 | $42.16 | $463.8K | 116,221 |
| Jun 4, 2026 | Brown Shelly | officer: EVP, Chief Strategy Officer | Sell | 16,000 | $42.12 | $673.9K | 325,047 |
| Jun 4, 2026 | Comly Barbara J. | officer: EVP, GC & Corporate Secretary | Sell | 28,000 | $42.85 | $1.20M | 843,844 |
| Jun 4, 2026 | Gallagher Thomas P. | director, officer: Chairman & CEO | Sell | 70,000 | $42.36 | $2.97M | 1,723,275 |
| Jun 4, 2026 | Teekell Judson Gray | director | Sell | 3,000 | $42.78 | $128.3K | 71,014 |
| Jun 4, 2026 | Schafer Douglas M. JR | officer: EVP and CIO | Sell | 48,000 | $42.84 | $2.06M | 396,681 |
| May 18, 2026 | Emmons Lance | officer: EVP and CFO | Sell | 35,000 | $56.36 | $1.97M | 84,262-29% |
| May 7, 2026 | Gallagher Thomas P. | director, officer: Chairman & CEO | Sell | 15,771 | $47.92 | $755.7K | 1,723,275 |
| May 5, 2026 | Brown Shelly | officer: EVP, Chief Strategy Officer | Sell | 16,000 | $47.28 | $756.5K | 325,047 |
| May 5, 2026 | Teekell Judson Gray | director | Sell | 3,000 | $47.30 | $141.9K | 56,338 |
| May 5, 2026 | Comly Barbara J. | officer: EVP, GC & Corporate Secretary | Sell | 28,000 | $47.26 | $1.32M | 843,844 |
| May 5, 2026 | Schafer Douglas M. JR | officer: EVP and CIO | Sell | 48,000 | $47.25 | $2.27M | 396,681 |
| May 5, 2026 | Eckert Kurt M. | director | Sell | 5,625 | $47.29 | $266.0K | 142,375 |
| May 5, 2026 | Gallagher Thomas P. | director, officer: Chairman & CEO | Sell | 54,229 | $47.26 | $2.56M | 1,723,275 |
| May 5, 2026 | Deitzel Edward | officer: EVP, CRO, CCO MIAX Exchanges | Sell | 11,000 | $47.28 | $520.1K | 116,221 |
| Apr 17, 2026 | Gallagher Thomas P. | director, officer: Chairman & CEO | Sell | 224,025 | $43.43 | $9.73M | 1,827,399 |
| Apr 17, 2026 | Comly Barbara J. | officer: EVP, GC & Corporate Secretary | Sell | 29,667 | $43.64 | $1.29M | 843,844 |
| Apr 9, 2026 | Brown Shelly | officer: EVP, Chief Strategy Officer | Sell | 16,434 | $42.08 | $691.5K | 325,047 |
| Apr 9, 2026 | Deitzel Edward | officer: EVP, CRO, CCO MIAX Exchanges | Sell | 11,573 | $42.01 | $486.2K | 116,221 |
| Apr 8, 2026 | Brown Shelly | officer: EVP, Chief Strategy Officer | Sell | 3,257 | $41.52 | $135.2K | 325,047 |
| Apr 3, 2026 | Teekell Judson Gray | director | Sell | 2,700 | $40.00 | $108.0K | 59,338 |
| Mar 26, 2026 | Teekell Judson Gray | director | Sell | 300 | $40.00 | $12.0K | 62,038 |
| Mar 24, 2026 | Brown Shelly | officer: EVP, Chief Strategy Officer | Sell | 25,932 | $39.33 | $1.02M | 299,197 |
| Mar 20, 2026 | Eckert Kurt M. | director | Sell | 37,917 | $39.00 | $1.48M | 142,375 |
| Mar 18, 2026 | Schafer Douglas M. JR | officer: EVP and CIO | Sell | 48,000 | $39.74 | $1.91M | 396,681 |
| Mar 6, 2026 | STAHL MURRAY | director | Sell | 53,578 | $40.92 | $2.19M | 4,619,442 |
| Feb 18, 2026 | Brown Shelly | EVP, Chief Strategy Officer | Sell | 19,902 | $40.89 | $813.8K | 0 |
| Feb 18, 2026 | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | Sell | 6,035 | $40.89 | $246.8K | 0 |
| Feb 18, 2026 | Schafer Douglas M. JR | EVP and CIO | Sell | 32,565 | $40.89 | $1.33M | 0 |
MIAX Insiders
Gallagher Thomas P.
director, officer: Chairman & CEO
Bought $276.0KSold $21.94M
7 tradesLast: Jul 14, 2026
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