# Miami International Holdings, Inc. (MIAX)

> Cited company facts from SEC filings, by Steadybase. Web page: https://steadybase.io/company/miami-international-holdings-inc/ JSON: https://steadybase.io/company/miami-international-holdings-inc.json Checked Nov 10, 2026. Latest filing read: Nov 2, 2026.

## Company

- Legal name: MIAMI INTERNATIONAL HOLDINGS, INC.
- Ticker: MIAX (NYSE)
- SEC CIK: 0001438472
- Industry: Security Brokers, Dealers & Flotation Companies (SIC 6211)
- Headquarters: Princeton, NJ
- SEC filer category: Non-accelerated filer
- Website: martofmiami.com
- Investor relations: https://ir.miaxglobal.com/
- LinkedIn: https://www.linkedin.com/company/international-mart-of-miami
- Next earnings date: Mar 6, 2027 (estimated from past 8-K timing)

## Key facts

- Revenue: $1.4B for the fiscal year ended Dec 31, 2025 (10-K filed Mar 6, 2026). Source: https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/0001438472-26-000023-index.html
- Operating income: $92.0M for the fiscal year ended Dec 31, 2025 (10-K filed Mar 6, 2026). Source: https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/0001438472-26-000023-index.html
- Net income: -$70.0M for the fiscal year ended Dec 31, 2025 (10-K filed Mar 6, 2026). Source: https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/0001438472-26-000023-index.html
- Employees: 439 as of Dec 31, 2025, as reported in an SEC filing. Source: https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm
- Shares outstanding: 100,056,866 as of Oct 26, 2026 (10-Q filed Nov 2, 2026). Source: https://www.sec.gov/Archives/edgar/data/1438472/000162828026068667/0001628280-26-068667-index.html
- Auditor: Kpmg LLP, New York, New York, named in the latest 10-K. Source: https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm

## Business

The following description of our business should be read in conjunction with the information included elsewhere in this Annual Report on Form 10-K for the year ended December 31, 2025. This description contains forward-looking statements that involve risks and uncertainties.

Source: Item 1. Business, https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm

## Annual results

| Fiscal year ended | Revenue | Operating income | Net income |
|---|---|---|---|
| Dec 31, 2025 | $1.4B | $92.0M | -$70.0M |
| Dec 31, 2024 | $1.1B | -$2.8M | $102.1M |
| Dec 31, 2023 | $1.0B | -$2.9M | -$20.9M |

Each figure comes from the annual report for that year. Filing links for every figure: https://steadybase.io/company/miami-international-holdings-inc.json

## Officers and directors

- Thomas P. Gallagher, Chairman and Chief Executive Officer of MIAX. Source: 8-K filed Oct 29, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000143847226000044/miax3q26earningsreleasef.htm
- Cees Vermaas, CEO of TISEG. Source: Form 4 filed Jun 18, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000208066826000002/0002080668-26-000002-index.htm
- Lance Emmons, EVP and CFO. Source: Form 4 filed Aug 19, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000162828026057946/0001628280-26-057946-index.htm
- Harish Jayabalan, EVP, CISO and CRO. Source: Form 4 filed Sep 29, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000162828026063831/0001628280-26-063831-index.htm
- Shelly Brown, EVP, Chief Strategy Officer. Source: Form 4 filed Sep 17, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000208050626000027/0002080506-26-000027-index.htm
- Barbara J. Comly, EVP, GC & Corporate Secretary. Source: Form 4 filed Sep 4, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000208087826000016/0002080878-26-000016-index.htm
- Douglas M. Schafer JR, EVP and CIO. Source: Form 4 filed Sep 4, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000207944526000017/0002079445-26-000017-index.htm
- Edward Deitzel, EVP, CRO, CCO MIAX Exchanges. Source: Form 4 filed Sep 4, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000208067126000016/0002080671-26-000016-index.htm
- John Smollen, EVP, New Product Development. Source: Form 4 filed Jun 18, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000208070326000004/0002080703-26-000004-index.htm
- Barbara Comly, Executive Vice President, General Counsel and Corporate Secretary. Source: 10-K filed Mar 6, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm
- Cynthia Schwarzkopf, Director. Source: 10-K filed Mar 6, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm
- David Brown, Director. Source: 10-K filed Mar 6, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm
- J. Gray Teekell, Director. Source: 10-K filed Mar 6, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm
- John Beckelman, Director. Source: 10-K filed Mar 6, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm
- Kenneth W. Lozier, Director. Source: 10-K filed Mar 6, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm
- Kurt M. Eckert, Director. Source: 10-K filed Mar 6, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm
- Lee Becker, Director. Source: 10-K filed Mar 6, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm
- Lisa Moore, Director. Source: 10-K filed Mar 6, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm
- Mark F. Raymond, Director. Source: 10-K filed Mar 6, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm
- Mark I. Massad, Director. Source: 10-K filed Mar 6, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm
- Murray Stahl, Director. Source: 10-K filed Mar 6, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm
- Paul V. Stahlin, Director. Source: 10-K filed Mar 6, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm
- Talal Jassim Al-Bahar, Director. Source: 10-K filed Mar 6, 2026, https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm

## Recent 8-K events

- Oct 29, 2026: Item 2.02, Results of operations and financial condition (earnings release); Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1438472/000143847226000044/miax-20261029.htm
- Aug 5, 2026: Item 2.02, Results of operations and financial condition (earnings release); Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1438472/000143847226000040/miax-20260805.htm
- Jul 21, 2026: Item 8.01, Other events. Source: https://www.sec.gov/Archives/edgar/data/1438472/000162828026049014/miax-20260720.htm
- Jun 22, 2026: Item 3.02, Unregistered sales of equity securities. Source: https://www.sec.gov/Archives/edgar/data/1438472/000143847226000036/miax-20260617.htm
- Jun 18, 2026: Item 5.07, Submission of matters to a vote of security holders. Source: https://www.sec.gov/Archives/edgar/data/1438472/000143847226000032/miax-20260616.htm
- Jun 17, 2026: Item 5.02, Departure or appointment of directors or officers; compensation. Source: https://www.sec.gov/Archives/edgar/data/1438472/000143847226000030/miax-20260615.htm
- May 6, 2026: Item 2.02, Results of operations and financial condition (earnings release); Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1438472/000162828026031291/miax-20260506.htm
- Apr 27, 2026: Item 5.02, Departure or appointment of directors or officers; compensation. Source: https://www.sec.gov/Archives/edgar/data/1438472/000162828026027311/miax-20260423.htm
- Apr 9, 2026: Item 5.02, Departure or appointment of directors or officers; compensation. Source: https://www.sec.gov/Archives/edgar/data/1438472/000143847226000026/miax-20260407.htm
- Mar 26, 2026: Item 5.02, Departure or appointment of directors or officers; compensation. Source: https://www.sec.gov/Archives/edgar/data/1438472/000162828026021455/miax-20260324.htm

## Insider trades (Form 4)

- Nov 4, 2026: Douglas M. Schafer JR (EVP and CIO) sold 48,000 shares, about $1.6M. Source: https://www.sec.gov/Archives/edgar/data/1438472/000207944526000021/0002079445-26-000021-index.htm
- Nov 4, 2026: Barbara J. Comly (EVP, GC & Corporate Secretary) sold 79,361 shares, about $2.8M. Source: https://www.sec.gov/Archives/edgar/data/1438472/000208087826000020/0002080878-26-000020-index.htm
- Oct 22, 2026: Barbara J. Comly (EVP, GC & Corporate Secretary) sold 12,306 shares, about $431,202. Source: https://www.sec.gov/Archives/edgar/data/1438472/000208087826000018/0002080878-26-000018-index.htm
- Oct 22, 2026: Douglas M. Schafer JR (EVP and CIO) sold 8,000 shares, about $280,480. Source: https://www.sec.gov/Archives/edgar/data/1438472/000207944526000019/0002079445-26-000019-index.htm
- Oct 2, 2026: Douglas M. Schafer JR (EVP and CIO) sold 40,000 shares, about $1.3M. Source: https://www.sec.gov/Archives/edgar/data/1438472/000162828026065268/0001628280-26-065268-index.htm
- Sep 16, 2026: Shelly Brown (EVP, Chief Strategy Officer) sold 21,217 shares, about $819,188. Source: https://www.sec.gov/Archives/edgar/data/1438472/000208050626000027/0002080506-26-000027-index.htm
- Sep 3, 2026: Edward Deitzel (EVP, CRO, CCO MIAX Exchanges) sold 11,000 shares, about $464,310. Source: https://www.sec.gov/Archives/edgar/data/1438472/000208067126000016/0002080671-26-000016-index.htm
- Sep 3, 2026: Thomas P. Gallagher (Chairman & CEO) sold 47,000 shares, about $2.0M. Source: https://www.sec.gov/Archives/edgar/data/1438472/000208047726000018/0002080477-26-000018-index.htm
- Sep 2, 2026: Barbara J. Comly (EVP, GC & Corporate Secretary) sold 44,445 shares, about $1.8M. Source: https://www.sec.gov/Archives/edgar/data/1438472/000208087826000016/0002080878-26-000016-index.htm
- Sep 2, 2026: Douglas M. Schafer JR (EVP and CIO) sold 48,000 shares, about $1.9M. Source: https://www.sec.gov/Archives/edgar/data/1438472/000207944526000017/0002079445-26-000017-index.htm
- Sep 2, 2026: Judson Gray Teekell (Director) sold 8,545 shares, about $353,231. Source: https://www.sec.gov/Archives/edgar/data/1438472/000195977026000012/0001959770-26-000012-index.htm
- Aug 19, 2026: Thomas P. Gallagher (Chairman & CEO) sold 149,700 shares, about $6.2M. Source: https://www.sec.gov/Archives/edgar/data/1438472/000208047726000016/0002080477-26-000016-index.htm
- Aug 17, 2026: Cynthia Schwarzkopf (Director) sold 5,000 shares, about $214,250. Source: https://www.sec.gov/Archives/edgar/data/1438472/000162828026057950/0001628280-26-057950-index.htm
- Aug 17, 2026: Lance Emmons (EVP and CFO) sold 35,000 shares, about $1.5M. Source: https://www.sec.gov/Archives/edgar/data/1438472/000162828026057946/0001628280-26-057946-index.htm
- Aug 4, 2026: Barbara J. Comly (EVP, GC & Corporate Secretary) sold 44,445 shares, about $2.0M. Source: https://www.sec.gov/Archives/edgar/data/1438472/000208087826000012/0002080878-26-000012-index.htm

## What management said

- "MIAX’s lean, high-margin operating model enabled us to deliver strong revenue growth and margin expansion in the third quarter" Thomas P. Gallagher, Chairman and Chief Executive Officer of MIAX (8-K filed Oct 29, 2026). Source: https://www.sec.gov/Archives/edgar/data/1438472/000143847226000044/miax3q26earningsreleasef.htm

## Latest filings

- 8-K filed Oct 29, 2026: https://www.sec.gov/Archives/edgar/data/1438472/000143847226000044/miax-20261029.htm
- 10-K filed Mar 6, 2026: https://www.sec.gov/Archives/edgar/data/1438472/000143847226000023/miax-20251231.htm
- 10-Q filed Nov 2, 2026: https://www.sec.gov/Archives/edgar/data/1438472/000162828026068667/miax-20260930.htm
- DEF 14A filed Apr 27, 2026: https://www.sec.gov/Archives/edgar/data/1438472/000162828026027312/miax-20260426.htm

## About this data

SEC EDGAR filings, read by Steadybase. Every value links to the filing it came from.
Steadybase covers US-headquartered public companies that file with the SEC. API and MCP access: https://steadybase.io/docs/