Skip to main content
Livermore
Livermore
ZHEN

Miami International Holdings, Inc.

MIAX
Exchange
NYSE
Industry
Security Brokers, Dealers & Flotation Companies
SEC CIK
0001438472

In the last 90 days, Miami International Holdings, Inc. insiders filed 0 open-market purchases and 27 sales; 206 institutions reported holding it in 13F filings for Q2 2026, worth $2.68B in total; no superinvestor holds it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Miami International Holdings, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
27 filings
10 insiders, $36.0M in total
Insiders trading
10
Net value
−$36.0M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Miami International Holdings, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Miami International Holdings, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Brown ShellyEVP, Chief Strategy Officer316,490Sep 17, 202614
Gallagher Thomas P.Chairman & CEO786,542Sep 4, 202614
Comly Barbara J.EVP, GC & Corporate Secretary839,564Sep 4, 202611
Deitzel EdwardEVP, CRO, CCO MIAX Exchanges119,601Sep 4, 202610
Schafer Douglas M. JREVP and CIO387,414Sep 4, 202610
Teekell Judson GrayDirector69,251Sep 4, 20269
Schwarzkopf CynthiaDirector88,545Aug 19, 20264
Emmons LanceEVP and CFO86,538Aug 19, 20265
Eckert Kurt M.Director149,612Aug 6, 20266
Jayabalan HarishEVP, CISO and CRO78,065Aug 6, 20264
Brown David ADirector7,066Jul 9, 20262
Vermaas CeesCEO of TISEG4,660Jun 18, 20261
Smollen JohnEVP, New Product Development178,212Jun 18, 20262
Sommers Jill E.Director6,083Jun 17, 20261
Stahlin PaulDirector42,143Jun 17, 20262
Sites EricDirector5,684Jun 17, 20261
Raymond Mark F.Director67,064Jun 17, 20261
Beckelman JohnDirector15,904Jun 17, 20262
Al-Bahar Talal JassimDirector40,891Jun 17, 20261
Massad Mark I.Director10,737Jun 17, 20261
Lozier Kenneth W.Director8,237Jun 17, 20261
Becker LeeDirector2,267Jun 17, 20261
Moore LisaDirector12,737Jun 17, 20261
Horizon Kinetics Asset Management LLC10% Owner2,170,898IndirectMay 21, 20268
Stahl MurrayDirector4,633,842IndirectMar 6, 20267
Nazarali JamilDirector2,500Aug 15, 20250

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Jul 7, 2026 (view filing)4:08 PM ETJul 25 daysEckert Kurt M.DirectorSSale−5.25K$39.35−$206.6K−3.4%149.6K after10b5-1
Jul 7, 2026 (view filing)4:09 PM ETJul 25 daysTeekell Judson GrayDirectorSSale−3.00K$40.00−$120.0K−3.8%75.3K after10b5-1
Jul 7, 2026 (view filing)4:10 PM ETJul 61 dayBrown ShellyEVP, Chief Strategy OfficerSSale−16.0K$42.13−$674.1K−4.3%354.0K after10b5-1
Jul 7, 2026 (view filing)4:13 PM ETJul 61 dayDeitzel EdwardEVP, CRO, CCO MIAX ExchangesSSale−11.0K$42.04−$462.4K−8.4%119.6K after10b5-1
Jul 7, 2026 (view filing)4:14 PM ETJul 61 dayJayabalan HarishEVP, CISO and CROSSale−20.0K$42.12−$842.4K−20.4%78.1K after10b5-1
Jul 7, 2026 (view filing)5:03 PM ETJul 6-71 dayGallagher Thomas P.Chairman & CEOSSale−70.0K$42.16−$2.95M−3.9%1.72M after2 lots10b5-1
Jul 14, 2026 (view filing)4:04 PM ETJul 131 dayGallagher Thomas P.Chairman & CEOSSale−70.0K$42.52−$2.98M−3.9%1.72M after10b5-1
Jul 14, 2026 (view filing)4:07 PM ETJul 131 dayComly Barbara J.EVP, GC & Corporate SecretarySSale−28.0K$41.98−$1.18M−3.1%883.0K after10b5-1
Jul 16, 2026 (view filing)4:15 PM ETJul 151 daySchwarzkopf CynthiaDirectorSSale−5.00K$42.00−$210.0K−5.3%88.5K after10b5-1
Aug 6, 2026 (view filing)4:05 PM ETAug 42 daysGallagher Thomas P.Chairman & CEOSSale−48.3K$45.69−$2.21M−2.7%1.72M after10b5-1
Aug 6, 2026 (view filing)4:06 PM ETAug 42 daysSchafer Douglas M. JREVP and CIOSSale−48.0K$45.71−$2.19M−11.0%387.4K after10b5-1
Aug 6, 2026 (view filing)4:08 PM ETAug 42 daysDeitzel EdwardEVP, CRO, CCO MIAX ExchangesSSale−11.0K$45.78−$503.6K−8.4%119.6K after10b5-1
Aug 6, 2026 (view filing)4:09 PM ETAug 42 daysComly Barbara J.EVP, GC & Corporate SecretarySSale−44.4K$45.69−$2.03M−4.8%883.0K after10b5-1
Aug 6, 2026 (view filing)4:10 PM ETAug 42 daysJayabalan HarishEVP, CISO and CROSSale−20.0K$45.90−$918.0K−20.4%78.1K after10b5-1
Aug 6, 2026 (view filing)4:10 PM ETAug 42 daysTeekell Judson GrayDirectorSSale−3.00K$45.79−$137.4K−4.0%72.3K after10b5-1
Aug 6, 2026 (view filing)4:11 PM ETAug 42 daysEckert Kurt M.DirectorSSale−1.06K$45.80−$48.7K−0.7%149.6K after10b5-1
Aug 19, 2026 (view filing)4:10 PM ETAug 172 daysEmmons LanceEVP and CFOSSale−35.0K$42.83−$1.50M−28.8%86.5K after10b5-1
Aug 19, 2026 (view filing)4:12 PM ETAug 172 daysSchwarzkopf CynthiaDirectorSSale−5.00K$42.85−$214.3K−5.3%88.5K after10b5-1
Aug 20, 2026 (view filing)4:12 PM ETAug 191 dayGallagher Thomas P.Chairman & CEOSSale−149.7K$41.13−$6.16M−9.5%1.42M after10b5-1
Sep 4, 2026 (view filing)4:21 PM ETSep 22 daysTeekell Judson GrayDirectorSSale−5.54K$41.58−$230.6K−6.4%81.0K after10b5-1
Sep 4, 2026 (view filing)4:21 PM ETSep 22 daysTeekell Judson GrayDirectorSSale−3.00K$40.89−$122.7K−4.2%69.3K after10b5-1
Sep 4, 2026 (view filing)4:25 PM ETSep 22 daysSchafer Douglas M. JREVP and CIOSSale−48.0K$40.48−$1.94M−11.0%387.4K after10b5-1
Sep 4, 2026 (view filing)4:28 PM ETSep 31 dayDeitzel EdwardEVP, CRO, CCO MIAX ExchangesSSale−11.0K$42.21−$464.3K−8.4%119.6K after10b5-1
Sep 4, 2026 (view filing)4:31 PM ETSep 22 daysComly Barbara J.EVP, GC & Corporate SecretarySSale−44.4K$40.49−$1.80M−5.0%839.6K after10b5-1
Sep 4, 2026 (view filing)4:35 PM ETSep 31 dayGallagher Thomas P.Chairman & CEOSSale−47.0K$42.43−$1.99M−3.2%1.42M after10b5-1
Sep 17, 2026 (view filing)4:43 PM ETSep 161 dayBrown ShellyEVP, Chief Strategy OfficerSSale−21.2K$38.61−$819.2K−6.3%316.5K after10b5-1