Insider Trading › MIAX › Insiders
MIAMI INTERNATIONAL HOLDINGS, INC.
MIAX·NYSE·
United States·Insider activity
United States·Insider activity$30.79
-3.53 (-10.29%)
Close · Oct 6, 2026 · Close Prices from Tiingo.com
MIAX
Insider purchases and sales on the price
Nasdaq 100S&P 500
Filings
Default90D1Y5YALL
MIAXS&P 500 (rebased)
Insider BuyInsider SellForm 144 · planned sale
Loading price history…
Daily closes, adjusted for splits and dividends · Close Prices from Tiingo.comHover a marker, every one is a filing · move across the line for the crosshair
In the last 180 days, MIAX insiders filed 0 purchases ($0) and 54 sales ($68.5M) on the open market, by 10 insiders. Newest filing Oct 6, 2026 (yesterday).
Net Insider Buying by Quarter
Shares bought (+) or sold (−) on the open market by MIAX insiders · Form 4 · last two years
On Record
$0Purchases · 180 days
$68.5MSales · 180 days
89Open-market transactions on record
10Insiders filing · 180 days
Purchases (code P) and sales (code S) of MIAX common stock reported on Form 4, with Form 5 annual catch-ups. Grants, option exercises, gifts and tax withholding are not shown. Dollars are shares × the stated price; a price outside anything the stock traded at that day is withheld (n/c).
Insider Transactions
89 on record · newest trade first
AllPurchasesSalesOfficers & directors
| Insider | Type | Shares | Price | Value | Held after | Traded | Filed | |
|---|---|---|---|---|---|---|---|---|
| Schafer Douglas M. JREVP and CIO | Sale | −40.0K | $33.34 | $1.3M | 387.4Kdirect | Oct 2, 2026 | Oct 6, 2026 | Form 4 ↗ |
| Brown ShellyEVP, Chief Strategy Officer | Sale | −21.2K | $38.61 | $819K | 316.5Kdirect | Sep 16, 2026 | Sep 17, 2026 | Form 4 ↗ |
| Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Sale | −11.0K | $42.21 | $464K | 119.6Kdirect | Sep 3, 2026 | Sep 4, 2026 | Form 4 ↗ |
| Gallagher Thomas P.Chairman & CEO · Director | Sale | −47.0K | $42.43 | $2.0M | 1.4Mindirect | Sep 3, 2026 | Sep 4, 2026 | Form 4 ↗ |
| Comly Barbara J.EVP, GC & Corporate Secretary | Sale | −44.4K | $40.49 | $1.8M | 839.6Kdirect | Sep 2, 2026 | Sep 4, 2026 | Form 4 ↗ |
| Schafer Douglas M. JREVP and CIO | Sale | −48.0K | $40.48 | $1.9M | 387.4Kdirect | Sep 2, 2026 | Sep 4, 2026 | Form 4 ↗ |
| Teekell Judson GrayDirector · Director | Sale | −5,545 | $41.58 | $231K | 81.0Kindirect | Sep 2, 2026 | Sep 4, 2026 | Form 4 ↗ |
| Teekell Judson GrayDirector · Director | Sale | −3,000 | $40.89 | $123K | 69.3Kdirect | Sep 2, 2026 | Sep 4, 2026 | Form 4 ↗ |
| Gallagher Thomas P.Chairman & CEO · Director | Sale | −149.7K | $41.13 | $6.2M | 1.4Mindirect | Aug 19, 2026 | Aug 20, 2026 | Form 4 ↗ |
| Schwarzkopf CynthiaDirector · Director | Sale | −5,000 | $42.85 | $214K | 88.5Kdirect | Aug 17, 2026 | Aug 19, 2026 | Form 4 ↗ |
| Emmons LanceEVP and CFO | Sale | −35.0K | $42.83 | $1.5M | 86.5Kdirect | Aug 17, 2026 | Aug 19, 2026 | Form 4 ↗ |
| Comly Barbara J.EVP, GC & Corporate Secretary | Sale | −44.4K | $45.69 | $2.0M | 883.0Kdirect | Aug 4, 2026 | Aug 6, 2026 | Form 4 ↗ |
| Eckert Kurt M.Director · Director | Sale | −1,063 | $45.80 | $49K | 149.6Kdirect | Aug 4, 2026 | Aug 6, 2026 | Form 4 ↗ |
| Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Sale | −11.0K | $45.78 | $504K | 119.6Kdirect | Aug 4, 2026 | Aug 6, 2026 | Form 4 ↗ |
| Jayabalan HarishEVP, CISO and CRO | Sale | −20.0K | $45.90 | $918K | 78.1Kdirect | Aug 4, 2026 | Aug 6, 2026 | Form 4 ↗ |
| Gallagher Thomas P.Chairman & CEO · Director | Sale | −48.3K | $45.69 | $2.2M | 1.7Mindirect | Aug 4, 2026 | Aug 6, 2026 | Form 4 ↗ |
| Schafer Douglas M. JREVP and CIO | Sale | −48.0K | $45.71 | $2.2M | 387.4Kdirect | Aug 4, 2026 | Aug 6, 2026 | Form 4 ↗ |
| Teekell Judson GrayDirector · Director | Sale | −3,000 | $45.79 | $137K | 72.3Kdirect | Aug 4, 2026 | Aug 6, 2026 | Form 4 ↗ |
| Schwarzkopf CynthiaDirector · Director | Sale | −5,000 | $42.00 | $210K | 88.5Kdirect | Jul 15, 2026 | Jul 16, 2026 | Form 4 ↗ |
| Comly Barbara J.EVP, GC & Corporate Secretary | Sale | −28.0K | $41.98 | $1.2M | 883.0Kdirect | Jul 13, 2026 | Jul 14, 2026 | Form 4 ↗ |
| Gallagher Thomas P.Chairman & CEO · Director | Sale | −70.0K | $42.52 | $3.0M | 1.7Mindirect | Jul 13, 2026 | Jul 14, 2026 | Form 4 ↗ |
| Gallagher Thomas P.Chairman & CEO · Director | Sale | −28.2K | $42.27 | $1.2M | 1.7Mindirect | Jul 7, 2026 | Jul 7, 2026 | Form 4 ↗ |
| Gallagher Thomas P.Chairman & CEO · Director | Sale | −41.8K | $42.09 | $1.8M | 1.7Mindirect | Jul 6, 2026 | Jul 7, 2026 | Form 4 ↗ |
| Jayabalan HarishEVP, CISO and CRO | Sale | −20.0K | $42.12 | $842K | 78.1Kdirect | Jul 6, 2026 | Jul 7, 2026 | Form 4 ↗ |
| Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Sale | −11.0K | $42.04 | $462K | 119.6Kdirect | Jul 6, 2026 | Jul 7, 2026 | Form 4 ↗ |
| Brown ShellyEVP, Chief Strategy Officer | Sale | −16.0K | $42.13 | $674K | 354.0Kdirect | Jul 6, 2026 | Jul 7, 2026 | Form 4 ↗ |
| Teekell Judson GrayDirector · Director | Sale | −3,000 | $40.00 | $120K | 75.3Kdirect | Jul 2, 2026 | Jul 7, 2026 | Form 4 ↗ |
| Eckert Kurt M.Director · Director | Sale | −5,250 | $39.35 | $207K | 149.6Kdirect | Jul 2, 2026 | Jul 7, 2026 | Form 4 ↗ |
| Comly Barbara J.EVP, GC & Corporate Secretary | Sale | −28.0K | $41.22 | $1.2M | 883.0Kdirect | Jul 2, 2026 | Jul 7, 2026 | Form 4 ↗ |
| Schafer Douglas M. JREVP and CIO | Sale | −48.0K | $41.22 | $2.0M | 387.4Kdirect | Jul 2, 2026 | Jul 7, 2026 | Form 4 ↗ |
| Brown ShellyEVP, Chief Strategy Officer | Sale | −4,714 | $44.23 | $209K | 316.7Kdirect | Jun 15, 2026 | Jun 17, 2026 | Form 4 ↗ |
| Schwarzkopf CynthiaDirector | Sale | −19.5K | $41.73 | $814K | 81.3Kdirect | Jun 11, 2026 | Jun 12, 2026 | Form 4 ↗ |
| Jayabalan HarishEVP, CISO and CRO | Sale | −9,783 | $40.04 | $392K | 73.4Kdirect | Jun 9, 2026 | Jun 10, 2026 | Form 4 ↗ |
| Jayabalan HarishEVP, CISO and CRO | Sale | −10.2K | $40.12 | $410K | 73.4Kdirect | Jun 8, 2026 | Jun 10, 2026 | Form 4 ↗ |
| Comly Barbara J.EVP, GC & Corporate Secretary | Sale | −28.0K | $42.85 | $1.2M | 843.8Kdirect | Jun 2, 2026 | Jun 4, 2026 | Form 4 ↗ |
| Eckert Kurt M.Director | Sale | −5,250 | $42.76 | $224K | 142.4Kdirect | Jun 2, 2026 | Jun 4, 2026 | Form 4 ↗ |
| Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Sale | −11.0K | $42.16 | $464K | 116.2Kdirect | Jun 2, 2026 | Jun 4, 2026 | Form 4 ↗ |
| Brown ShellyEVP, Chief Strategy Officer | Sale | −16.0K | $42.12 | $674K | 325.0Kdirect | Jun 2, 2026 | Jun 4, 2026 | Form 4 ↗ |
| Gallagher Thomas P.Chairman & CEO · Director | Sale | −70.0K | $42.36 | $3.0M | 1.7Mindirect | Jun 2, 2026 | Jun 4, 2026 | Form 4 ↗ |
| Schafer Douglas M. JREVP and CIO | Sale | −48.0K | $42.84 | $2.1M | 396.7Kdirect | Jun 2, 2026 | Jun 4, 2026 | Form 4 ↗ |
| Teekell Judson GrayDirector | Sale | −3,000 | $42.78 | $128K | 71.0Kdirect | Jun 2, 2026 | Jun 4, 2026 | Form 4 ↗ |
| Emmons LanceEVP and CFO | Sale | −35.0K | $56.36 | $2.0M | 84.3Kdirect | May 15, 2026 | May 18, 2026 | Form 4 ↗ |
| Gallagher Thomas P.Chairman & CEO · Director | Sale | −15.8K | $47.92 | $756K | 1.7Mindirect | May 5, 2026 | May 7, 2026 | Form 4 ↗ |
| Comly Barbara J.EVP, GC & Corporate Secretary | Sale | −28.0K | $47.26 | $1.3M | 843.8Kdirect | May 4, 2026 | May 5, 2026 | Form 4 ↗ |
| Eckert Kurt M.Director | Sale | −5,625 | $47.29 | $266K | 142.4Kdirect | May 4, 2026 | May 5, 2026 | Form 4 ↗ |
| Brown ShellyEVP, Chief Strategy Officer | Sale | −16.0K | $47.28 | $756K | 325.0Kdirect | May 4, 2026 | May 5, 2026 | Form 4 ↗ |
| Schafer Douglas M. JREVP and CIO | Sale | −48.0K | $47.25 | $2.3M | 396.7Kdirect | May 4, 2026 | May 5, 2026 | Form 4 ↗ |
| Teekell Judson GrayDirector | Sale | −3,000 | $47.30 | $142K | 56.3Kdirect | May 4, 2026 | May 5, 2026 | Form 4 ↗ |
| Gallagher Thomas P.Chairman & CEO · Director | Sale | −54.2K | $47.26 | $2.6M | 1.7Mindirect | May 4, 2026 | May 5, 2026 | Form 4 ↗ |
| Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Sale | −11.0K | $47.28 | $520K | 116.2Kdirect | May 4, 2026 | May 5, 2026 | Form 4 ↗ |
| Gallagher Thomas P.Chairman & CEO · Director | Sale | −49.9K | $43.68 | $2.2M | 486.0Kdirect | Apr 15, 2026 | Apr 17, 2026 | Form 4 ↗ |
| Gallagher Thomas P.Chairman & CEO · Director | Sale | −104.1K | $43.36 | $4.5M | 1.7Mindirect | Apr 15, 2026 | Apr 17, 2026 | Form 4 ↗ |
| Gallagher Thomas P.Chairman & CEO · Director | Sale | −70.0K | $43.36 | $3.0M | 1.8Mindirect | Apr 15, 2026 | Apr 17, 2026 | Form 4 ↗ |
| Comly Barbara J.EVP, GC & Corporate Secretary | Sale | −29.7K | $43.64 | $1.3M | 843.8Kdirect | Apr 15, 2026 | Apr 17, 2026 | Form 4 ↗ |
| Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Sale | −7,572 | $42.02 | $318K | 116.2Kdirect | Apr 8, 2026 | Apr 9, 2026 | Form 4 ↗ |
| Brown ShellyEVP, Chief Strategy Officer | Sale | −16.4K | $42.08 | $692K | 325.0Kdirect | Apr 8, 2026 | Apr 9, 2026 | Form 4 ↗ |
| Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Sale | −4,001 | $42.00 | $168K | 116.2Kdirect | Apr 7, 2026 | Apr 9, 2026 | Form 4 ↗ |
| Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Sale | −762 | $42.00 | $32K | 116.2Kdirect | Apr 7, 2026 | Apr 9, 2026 | Form 4 ↗ |
| Brown ShellyEVP, Chief Strategy Officer | Sale Amended | −900 | $42.00 | $38K | 325.0Kdirect | Apr 7, 2026 | Apr 9, 2026 | Form 4 ↗ |
| Brown ShellyEVP, Chief Strategy Officer | Sale | −900 | $42.00 | $38K | 324.1Kdirect | Apr 7, 2026 | Apr 8, 2026 | Form 4 ↗ |
| Brown ShellyEVP, Chief Strategy Officer | Sale Amended | −2,357 | $41.33 | $97K | 325.0Kdirect | Apr 6, 2026 | Apr 9, 2026 | Form 4 ↗ |
| Brown ShellyEVP, Chief Strategy Officer | Sale | −2,357 | $41.33 | $97K | 325.0Kdirect | Apr 6, 2026 | Apr 8, 2026 | Form 4 ↗ |
| Teekell Judson GrayDirector | Sale | −2,700 | $40.00 | $108K | 59.3Kdirect | Apr 2, 2026 | Apr 3, 2026 | Form 4 ↗ |
| Teekell Judson GrayDirector | Sale | −300 | $40.00 | $12K | 62.0Kdirect | Mar 25, 2026 | Mar 26, 2026 | Form 4 ↗ |
| Brown ShellyEVP, Chief Strategy Officer | Sale | −25.9K | $39.33 | $1.0M | 299.2Kdirect | Mar 23, 2026 | Mar 24, 2026 | Form 4 ↗ |
| Eckert Kurt M.Director | Sale | −37.9K | $39.00 | $1.5M | 142.4Kdirect | Mar 19, 2026 | Mar 20, 2026 | Form 4 ↗ |
| Schafer Douglas M. JREVP and CIO | Sale | −48.0K | $39.74 | $1.9M | 396.7Kdirect | Mar 17, 2026 | Mar 18, 2026 | Form 4 ↗ |
| STAHL MURRAYDirector · 10% owner | Purchase | +7,200 | $43.08 | $310K | 4.6Mindirect | Mar 5, 2026 | Mar 6, 2026 | Form 4 ↗ |
| STAHL MURRAYDirector · 10% owner | Purchase Amended | +7,200 | $43.38 | $312K | 4.6Mindirect | Mar 4, 2026 | Mar 6, 2026 | Form 4 ↗ |
| HORIZON KINETICS ASSET MANAGEMENT LLC | Purchase | +7,200 | $43.38 | $312K | 4.7Mindirect | Mar 4, 2026 | Mar 5, 2026 | Form 4 ↗ |
| STAHL MURRAYDirector · 10% owner | Sale Amended | −53.6K | $40.92 | $2.2M | 4.6Mindirect | Mar 2, 2026 | Mar 6, 2026 | Form 4 ↗ |
| HORIZON KINETICS ASSET MANAGEMENT LLC | Sale | −121.1K | $40.92 | $5.0M | 4.7Mindirect | Mar 2, 2026 | Mar 4, 2026 | Form 4 ↗ |
| STAHL MURRAYDirector · 10% owner | Purchase | +2,439 | $41.00 | $100K | 4.6Mindirect | Dec 12, 2025 | Dec 15, 2025 | Form 4 ↗ |
| HORIZON KINETICS ASSET MANAGEMENT LLC | Purchase | +2 | $41.97 | $84 | 4.6Mindirect | Oct 3, 2025 | Oct 6, 2025 | Form 4 ↗ |
| STAHL MURRAYDirector · 10% owner | Purchase | +4 | $41.76 | $167 | 4.6Mindirect | Sep 26, 2025 | Sep 30, 2025 | Form 4 ↗ |
| HORIZON KINETICS ASSET MANAGEMENT LLC | Purchase | +34.5K | $36.10 | $1.2M | 4.6Mindirect | Aug 28, 2025 | Sep 30, 2025 | Form 4 ↗ |
| Emmons LanceEVP and CFO | Purchase | +4 | $31.44 | $126 | 4indirect | Aug 14, 2025 | Aug 18, 2025 | Form 4 ↗ |
| Moore LisaDirector | Purchase | +5,500 | $23.00 | $127K | 5,500direct | Aug 13, 2025 | Aug 15, 2025 | Form 4 ↗ |
| Jayabalan HarishEVP, CISO and CRO | Purchase | +2,500 | $23.00 | $58K | 6,443direct | Aug 13, 2025 | Aug 15, 2025 | Form 4 ↗ |
| Stahlin PaulDirector | Purchase | +1,000 | $23.00 | $23K | 1,000direct | Aug 13, 2025 | Aug 15, 2025 | Form 4 ↗ |
| Nazarali JamilDirector | Purchase | +2,500 | $23.00 | $58K | 2,500direct | Aug 13, 2025 | Aug 15, 2025 | Form 4 ↗ |
| Smollen JohnEVP Traded Products & Relation | Purchase | +5,000 | $23.00 | $115K | 7,226direct | Aug 13, 2025 | Aug 15, 2025 | Form 4 ↗ |
| Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Purchase | +100 | $23.00 | $2K | 32.2Kdirect | Aug 13, 2025 | Aug 15, 2025 | Form 4 ↗ |
| Gallagher Thomas P.Chairman & CEO · Director | Purchase | +12.0K | $23.00 | $276K | 12.0Kdirect | Aug 13, 2025 | Aug 15, 2025 | Form 4 ↗ |
| Lozier Kenneth W.Director | Purchase | +1,000 | $23.00 | $23K | 1,000direct | Aug 13, 2025 | Aug 15, 2025 | Form 4 ↗ |
| Massad Mark I.Director | Purchase | +500 | $23.00 | $12K | 500indirect | Aug 13, 2025 | Aug 15, 2025 | Form 4 ↗ |
| Massad Mark I.Director | Purchase | +1,500 | $23.00 | $35K | 1,500indirect | Aug 13, 2025 | Aug 15, 2025 | Form 4 ↗ |
| Massad Mark I.Director | Purchase | +2,500 | $23.00 | $58K | 2,500indirect | Aug 13, 2025 | Aug 15, 2025 | Form 4 ↗ |
| Massad Mark I.Director | Purchase | +3,500 | $23.00 | $81K | 3,500direct | Aug 13, 2025 | Aug 15, 2025 | Form 4 ↗ |
Source: SEC EDGAR Form 4 and Form 5 filings, SEC's quarterly bulk dataset through Jun 30, 2026, and KeyVex's half-hourly read of new filings since. Every row links its filing. Amendments are marked. Nothing here is a recommendation. All insider activity, market-wide →