---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-26-031291"
form_type: "8-K"
ticker: "MIAX"
cik: "0001438472"
company_name: "MIAMI INTERNATIONAL HOLDINGS, INC."
filed_at: "2026-05-06T23:59:59+00:00"
generated_at: "2026-05-14T22:36:09.650642+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# MIAX Q1 net revenue $128.6M (+40% YoY); adjusted EPS $0.42, EBITDA margin 51%

## Summary
- 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.

## SEC filing metadata
- accession: 0001628280-26-031291
- form_type: 8-K
- ticker: MIAX
- cik: 0001438472
- company_name: MIAMI INTERNATIONAL HOLDINGS, INC.
- filed_at: 2026-05-06T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1438472/000162828026031291/0001628280-26-031291-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1438472/000162828026031291/miax-20260506.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-26-031291
- JSON: https://secwatch.observer/filing/0001628280-26-031291.json
- Plain text: https://secwatch.observer/filing/0001628280-26-031291.txt

## Source-grounded claims
- claim_id: 10b5172314f3bcc69e0723170f5fa9e4fdf644b6
  claim: MIAMI INTERNATIONAL HOLDINGS, INC. reported the quarter ended March 31, 2026 results: revenue $ 128,593, net income $ 170,224, EPS $ 1.56. Guidance reaffirmed.
  evidence_excerpt: Consolidated First Quarter Results 1Q26 March 31, 2026 1Q25 March 31, 2025 Change Total revenues less cost of revenues ("Net revenue") $ 128,593 $ 91,884 40 % Operating income $ 45,968 $ 22,293 106 % Net income (loss) attributable to MIH stockholders $ 170,224 $ (21,420) ** Diluted EPS $ 1.56 $ (0.34) **
  evidence_url: https://www.sec.gov/Archives/edgar/data/1438472/000162828026031291/0001628280-26-031291-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.