MIAX SEC Form 4 filings
Miami International Holdings, Inc. Latest Insider Trading Activity
Over the past 169 days, Miami International Holdings, Inc. (MIAX) has had 11 total open-market insider transactions represented in the displayed records. The most recent transaction was on October 2, 2026, when Schafer Douglas M. Jr (Miami International Holdings, Inc. EVP and CIO) reported a sale of 40,000 shares at $33.34 per share. This page shows up to the 10 most recent SEC Form 4 filing records on a 6-hour delay. Sign up for real-time updates and access to 20 years of historic insider trading data.
Insider Trading For MIAX Charted on Daily Candles. Scroll left or zoom out to load earlier candles (up to 2 years).
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| Ticker | Filing Date | Transaction Date | Company | Insider | Title | Transaction | Trade Count | Shares | Avg. Price | Total Value | Position Size Change | SEC Filing |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 10b5-1: Scheduled Form 4 Transaction MIAX | 2026-10-06 | 2026-10-02 | Miami International Holdings, Inc. | Schafer Douglas M. Jr | EVP and CIO | Sell | 1 | 40,000 | $33.34 | $1,333,600.00 | 9.36% | View Filing |
| 10b5-1: Scheduled Form 4 Transaction MIAX | 2026-06-17 | 2026-06-15 | Miami International Holdings, Inc. | Brown Shelly | EVP, Chief Strategy Officer | Sell | 1 | 4,714 | $44.23 | $208,500.22 | 1.47% | View Filing |
| 10b5-1: Scheduled Form 4 Transaction MIAX | 2026-06-12 | 2026-06-11 | Miami International Holdings, Inc. | Schwarzkopf Cynthia | Director | Sell | 1 | 19,500 | $41.73 | $813,735.00 | 19.34% | View Filing |
| 10b5-1: Scheduled Form 4 Transaction MIAX | 2026-06-10 | 2026-06-09 | Miami International Holdings, Inc. | Jayabalan Harish | EVP, CISO and CRO | Sell | 2 | 20,000 | $40.08 | $801,617.36 | 11.99% | View Filing |
| 10b5-1: Scheduled Form 4 Transaction MIAX | 2026-06-04 | 2026-06-02 | Miami International Holdings, Inc. | Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | Sell | 1 | 11,000 | $42.16 | $463,760.00 | 8.65% | View Filing |
| 10b5-1: Scheduled Form 4 Transaction MIAX | 2026-06-04 | 2026-06-02 | Miami International Holdings, Inc. | Gallagher Thomas P. | Chairman & CEO | Sell | 1 | 70,000 | $42.36 | $2,965,200.00 | 3.90% | View Filing |
| 10b5-1: Scheduled Form 4 Transaction MIAX | 2026-06-04 | 2026-06-02 | Miami International Holdings, Inc. | Comly Barbara J. | EVP, GC & Corporate Secretary | Sell | 1 | 28,000 | $42.85 | $1,199,800.00 | 3.21% | View Filing |
| 10b5-1: Scheduled Form 4 Transaction MIAX | 2026-05-07 | 2026-05-05 | Miami International Holdings, Inc. | Gallagher Thomas P. | Chairman & CEO | Sell | 1 | 15,771 | $47.92 | $755,746.32 | 0.91% | View Filing |
| 10b5-1: Scheduled Form 4 Transaction MIAX | 2026-05-05 | 2026-05-04 | Miami International Holdings, Inc. | Comly Barbara J. | EVP, GC & Corporate Secretary | Sell | 1 | 28,000 | $47.26 | $1,323,280.00 | 3.21% | View Filing |
| 10b5-1: Scheduled Form 4 Transaction MIAX | 2026-05-05 | 2026-05-04 | Miami International Holdings, Inc. | Schafer Douglas M. Jr | EVP and CIO | Sell | 1 | 48,000 | $47.25 | $2,268,000.00 | 10.79% | View Filing |
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