secwatch.observer — SEC 8-K summary
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Issuer:     MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX)
CIK:        0001438472
Form:       8-K
Filed at:   2026-02-25T23:59:59+00:00
Accession:  0001438472-26-000017
Event type: earnings
Sentiment:  positive
Materiality: 0.75
Item codes: 2.02, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

MIAX Q4 net revenue $124.5M (+52% YoY), adjusted EBITDA $62.2M (+112%); sets FY2026 guidance
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- Q4 GAAP diluted EPS $0.27; adjusted diluted EPS $0.52.
- FY2025 net revenue $430.5M (+56% YoY); GAAP diluted EPS ($1.00), adjusted diluted EPS $1.82.
- Options exchanges record average daily volume 11.1M contracts (+46.5% YoY); market share 18.2%.
- Completed sale of 90% of MIAXdx to Robinhood/Susquehanna JV in Jan 2026; retained 10%.
- FY2026 adjusted opex guidance $265M-275M; capex $40M-45M; D&A $33M-38M.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1438472/000143847226000017/0001438472-26-000017-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1438472/000143847226000017/miax-20260225.htm
  HTML page:      https://secwatch.observer/filing/0001438472-26-000017

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