Miami International Holdings, Inc.
- MIAX · NYSE
- Security Brokers, Dealers & Flotation Companies
- Princeton, NJ
- 439 employees
- CIK 0001438472
Updated from SEC filings through
Top things to know
Executives
-
Thomas P. Gallagher Chairman and Chief Executive Officer of MIAX 8-K, 2026-10-29 -
Cees Vermaas CEO of TISEG 4, 2026-06-18 -
Lance Emmons EVP and CFO 4, 2026-08-19 -
Shelly Brown EVP, Chief Strategy Officer 4, 2026-09-17 -
Barbara Comly Executive Vice President, General Counsel and Corporate Secretary 10-K, 2026-03-06 - Harish Jayabalan EVP, CISO and CRO 4, 2026-09-29
What leadership is saying
“MIAX’s lean, high-margin operating model enabled us to deliver strong revenue growth and margin expansion in the third quarter”
Earnings press release (8-K Ex. 99.1), filed October 29, 2026
Miami International Holdings, Inc. is a U.S. public company in security brokers, dealers & flotation companies (SIC 6211), headquartered in Princeton, NJ. It trades as MIAX on NYSE. Revenue was $1.4B in the fiscal year ending December 31, 2025, +19.6% from the year before. It reported about 439 employees. Thomas P. Gallagher is Chairman and Chief Executive Officer of MIAX.
Five-year financials
| Metric | FY2025 | FY2024 | FY2023 |
|---|---|---|---|
| Revenue | $1.4B 10-K, 2026-03-06 | $1.1B 10-K, 2026-03-06 | $1.0B 10-K, 2026-03-06 |
| Operating income | $92.0M 10-K, 2026-03-06 | -$2.8M 10-K, 2026-03-06 | -$2.9M 10-K, 2026-03-06 |
| SG&A | Not on file | Not on file | Not on file |
| Net income | -$70.0M 10-K, 2026-03-06 | $102M 10-K, 2026-03-06 | -$20.9M 10-K, 2026-03-06 |
Annual figures from XBRL in each company's own filings. Click a figure to open the filing. SG&A marked derived is general and administrative plus selling and marketing.
Leadership and board
| Name | Title | Source |
|---|---|---|
| Thomas P. Gallagher | Chairman and Chief Executive Officer of MIAX | 8-K, 2026-10-29 |
| Cees Vermaas | CEO of TISEG | 4, 2026-06-18 |
| Lance Emmons | EVP and CFO | 4, 2026-08-19 |
| Shelly Brown | EVP, Chief Strategy Officer | 4, 2026-09-17 |
| Barbara Comly | Executive Vice President, General Counsel and Corporate Secretary | 10-K, 2026-03-06 |
| Harish Jayabalan | EVP, CISO and CRO | 4, 2026-09-29 |
| Barbara J. Comly | EVP, GC & Corporate Secretary | 4, 2026-09-04 |
 Douglas M. Schafer JR | EVP and CIO | 4, 2026-09-04 |
 Edward Deitzel | EVP, CRO, CCO MIAX Exchanges | 4, 2026-09-04 |
| John Smollen | EVP, New Product Development | 4, 2026-06-18 |
| Cynthia Schwarzkopf | Director | 10-K, 2026-03-06 |
| David Brown | Director | 10-K, 2026-03-06 |
| J. Gray Teekell | Director | 10-K, 2026-03-06 |
| John Beckelman | Director | 10-K, 2026-03-06 |
| Kenneth W. Lozier | Director | 10-K, 2026-03-06 |
| Kurt M. Eckert | Director | 10-K, 2026-03-06 |
What Miami International Holdings, Inc. does
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.
Item 1. Business, 10-K for the year ending December 31, 2025
Shares and governance
| Shares outstanding | 100.1 million (as of October 26, 2026) | 10-Q, November 2, 2026 |
|---|---|---|
| Public float | $0 (as of June 30, 2025) | 10-K, March 6, 2026 |
| Reportable segments | 4 (period ending September 30, 2026) | 10-Q, November 2, 2026 |
| Latest proxy statement | Meeting June 16, 2026 (filed April 27, 2026) | DEF 14A, April 27, 2026 |
| Auditor | Kpmg LLP (New York, New York) | Latest 10-K |
Insider trades
Open-market buys and sales by officers and directors, from Forms 4 and 5. One row per filing.
| Date | Insider | Trade | Shares | Value | Source |
|---|---|---|---|---|---|
| November 4, 2026 | Douglas M. Schafer JR EVP and CIO | Sale | 48,000 | $1.6M | Form 4, November 5, 2026 |
| November 4, 2026 | Barbara J. Comly EVP, GC & Corporate Secretary | Sale | 79,361 | $2.8M | Form 4, November 4, 2026 |
| October 22, 2026 | Barbara J. Comly EVP, GC & Corporate Secretary | Sale | 12,306 | $431K | Form 4, October 26, 2026 |
| October 22, 2026 | Douglas M. Schafer JR EVP and CIO | Sale | 8,000 | $280K | Form 4, October 26, 2026 |
| October 2, 2026 | Douglas M. Schafer JR EVP and CIO | Sale | 40,000 | $1.3M | Form 4, October 6, 2026 |
| September 16, 2026 | Shelly Brown EVP, Chief Strategy Officer | Sale | 21,217 | $819K | Form 4, September 17, 2026 |
| September 3, 2026 | Edward Deitzel EVP, CRO, CCO MIAX Exchanges | Sale | 11,000 | $464K | Form 4, September 4, 2026 |
| September 3, 2026 | Thomas P. Gallagher Chairman & CEO | Sale | 47,000 | $2.0M | Form 4, September 4, 2026 |
Recent 8-K events
- 8-K filed 2026-10-29
- Item 2.02 Results of operations and financial condition (earnings release)
- 8-K filed 2026-08-05
- Item 2.02 Results of operations and financial condition (earnings release)
- 8-K filed 2026-07-21
- Item 8.01 Other events
- 8-K filed 2026-06-22
- Item 3.02 Unregistered sales of equity securities
- 8-K filed 2026-06-18
- Item 5.07 Submission of matters to a vote of security holders
- 8-K filed 2026-06-17
- Item 5.02 Departure or appointment of directors or officers; compensation
- 8-K filed 2026-05-06
- Item 2.02 Results of operations and financial condition (earnings release)
- 8-K filed 2026-04-27
- Item 5.02 Departure or appointment of directors or officers; compensation
- 8-K filed 2026-04-09
- Item 5.02 Departure or appointment of directors or officers; compensation
- 8-K filed 2026-03-26
- Item 5.02 Departure or appointment of directors or officers; compensation
Frequently asked questions about Miami International Holdings, Inc.
- What does Miami International Holdings, Inc. do?
- In its own words, from Item 1 of its 10-K: "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."
- What is Miami International Holdings, Inc.'s revenue?
- $1.4B for the fiscal year ending December 31, 2025, from its 10-K filed March 6, 2026.
- Is Miami International Holdings, Inc. profitable?
- Miami International Holdings, Inc. reported net income of -$70.0M for the fiscal year ending December 31, 2025.
- How many employees does Miami International Holdings, Inc. have?
- About 439 as of December 31, 2025, as stated in its annual report.
- Who is the CEO of Miami International Holdings, Inc.?
- Thomas P. Gallagher, Chairman and Chief Executive Officer of MIAX, as named in a 8-K filed October 29, 2026.
- Who is the CFO of Miami International Holdings, Inc.?
- Lance Emmons, EVP and CFO, as named in a 4 filed August 19, 2026.
- Where is Miami International Holdings, Inc. headquartered?
- Princeton, NJ.
- What is Miami International Holdings, Inc.'s stock ticker?
- MIAX on NYSE.
- What industry is Miami International Holdings, Inc. in?
- Security Brokers, Dealers & Flotation Companies, SIC code 6211.
- What is Miami International Holdings, Inc.'s website?
- martofmiami.com. Investor relations: https://ir.miaxglobal.com/.
- When does Miami International Holdings, Inc. report earnings next?
- March 6, 2027. Source: estimate_10q_cadence.
- Is Miami International Holdings, Inc. a public company?
- Yes. Miami International Holdings, Inc. files with the SEC under CIK 0001438472 and trades as MIAX.
- Who audits Miami International Holdings, Inc.?
- Kpmg LLP, New York, New York, as named in its latest annual report (10-K).
- How many shares of Miami International Holdings, Inc. are outstanding?
- 100.1 million shares as of October 26, 2026, from its 10-Q filed November 2, 2026.
- What is Miami International Holdings, Inc.'s public float?
- $0 as of June 30, 2025, as reported on the cover of its 10-K filed March 6, 2026.
- How many business segments does Miami International Holdings, Inc. report?
- 4 reportable segments for the period ending September 30, 2026, from its 10-Q filed November 2, 2026.
- When is Miami International Holdings, Inc.'s annual shareholder meeting?
- June 16, 2026, per its proxy statement (DEF 14A) filed April 27, 2026.
- Have Miami International Holdings, Inc. insiders traded stock recently?
- Since August 13, 2025, officers and directors reported 62 open-market sales worth about $84.5M and 16 purchases worth about $2.8M on Forms 4 and 5. The most recent: Douglas M. Schafer JR (EVP and CIO) sold 48,000 shares on November 4, 2026.