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MIAX — structural market context

Miami International Holdings,

Structural market context from public regulatory and market data, shown with its as-of dates. Descriptive only: nothing on this page is a recommendation, a prediction, or advice to buy or sell any security.

MIAX short interest & days to cover

SHARES SHORT
6.8M
% OF FLOAT
—
DAYS TO COVER
5.0
CHANGE VS PRIOR
+0.8%

FINRA consolidated short interest, reported twice a month and published ~2 weeks after each settlement date. % of float uses reported free float. · as of 2026-09-15 (23d ago)

MIAX fails-to-deliver (FTD)

Settlement dateFailed sharesPrice
2026-09-10 · 28d15K$42.89
2026-09-09 · 29d1K$43.46
2026-09-03 · 35d92K$40.62

SEC fails-to-deliver files, published twice a month with ~6 weeks of delay.

MIAX insider buying and selling (Form 4)

Last 12 months, open-market only: 0 purchases · 11 sales

InsiderTypeSharesValueFiled
Schafer Douglas M. JR · officer: EVP and CIOSell (S)40K$1.3M2026-10-06
Brown Shelly · officer: EVP, Chief Strategy OfficerSell (S)21K$819K2026-09-17
Schafer Douglas M. JR · officer: EVP and CIOSell (S)48K$1.9M2026-09-04
Comly Barbara J. · officer: EVP, GC & Corporate SecretarySell (S)44K$1.8M2026-09-04
Gallagher Thomas P. · director, officer: Chairman & CEOSell (S)47K$2.0M2026-09-04

SEC Form 4 filings, open-market purchases and sales only (codes P and S); grants and option exercises excluded. Attributed public records.

Frequently asked questions

Are insiders buying MIAX?
In the last 12 months of SEC Form 4 filings, MIAX recorded 0 open-market insider purchases and 11 open-market sales (codes P and S; grants and option exercises excluded). These are attributed public records — information, not instruction.
Is this page telling me to buy or sell MIAX?
No. Everything on this page is descriptive, structural market context from public data, shown with its as-of dates. TradeAI News does not issue directional recommendations, price predictions, or buy/sell advice — for any ticker.
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Not financial advice. Trading involves risk. Descriptive structural context, never a recommendation.