secwatch.observer — SEC 8-K summary
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Issuer:     MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX)
CIK:        0001438472
Form:       8-K
Filed at:   2026-05-06T23:59:59+00:00
Accession:  0001628280-26-031291
Event type: earnings
Sentiment:  positive
Materiality: 0.85
Item codes: 2.02, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

MIAX Q1 net revenue $128.6M (+40% YoY); adjusted EPS $0.42, EBITDA margin 51%
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- Q1 net revenue $128.6M (+40% YoY); GAAP diluted EPS $1.56; adjusted diluted EPS $0.42.
- Adjusted EBITDA $66.1M (+66% YoY); margin 51% (up 800 bps); options market share 17.3%.
- Options avg daily volume 10.9M contracts (+27% YoY); sale of MIAXdx contributed $50.5M gain.
- International net revenue $5.6M (up from $0.8M) on TISE acquisition; Equities segment turned positive.
- Reaffirms FY2026 adjusted opex guidance $265M-$275M; capex $40M-$45M.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1438472/000162828026031291/0001628280-26-031291-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1438472/000162828026031291/miax-20260506.htm
  HTML page:      https://secwatch.observer/filing/0001628280-26-031291

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer