MIAX at a glance
MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX, SEC CIK 1438472) filed its latest 10-K annual report on March 6, 2026, a 10-Q quarterly report on August 7, 2026, an 8-K current report on August 5, 2026 and Form 4 insider filings as recently as October 6, 2026. SignalX summarizes each filing with AI and tracks the company's insider trades and institutional holders.
- For the fiscal year ended December 31, 2025 (FY2025), MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) reported revenue of $1.4 billion (up 19.6% from FY2024) and a net loss of $70.0 million. Diluted EPS was -$1.00.
- As of June 30, 2026, 26 institutional investment managers tracked by SignalX reported holding MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) shares worth $889.0 million in 13F-HR filings.
- The most recent insider open-market sale reported on Form 4 was by Schafer Douglas M. JR on October 2, 2026 of 40,000 shares at $33.34 per share.
- In the last 90 days, MIAX insiders reported 0 open-market purchases ($0) and 21 open-market sales ($29.0M) on Form 4, a net sale of $29.0M.
Source: SEC EDGAR (XBRL financial data, 13F-HR and Form 4 filings).
- Revenue · FY2025
- $1.4B
- +19.6% vs prior year
- Insiders · 90 days
- 0 buys · 21 sells
- Net −$29.0M
- 13F holders
- 26 funds
- $889.0M · −3 vs prior quarter
- Latest 8-K
- Aug 5, 2026
- Item 2.02
AI 10-K Annual Report Analysis
Latest 10-K, fiscal year ended Dec 31, 2025
Business Overview
- Core business: Operates technology-driven regulated financial marketplaces across options, equities, futures, and international listings
- New: Exclusive 10-year license with Bloomberg for proprietary index futures and options, launching in Q2 2026
- Strategic shift: Sold 90% of MIAXdx (cryptocurrency derivatives exchange) to Robinhood/SIG joint venture in January 2026, retaining 10%
- Quantitative metric: 2025 U.S. options volume 2.4 billion contracts, up 41.1% YoY; MIAX Sapphire options exchange launched August 2024 with physical trading floor opened September 2025
- Noteworthy fact: Completed acquisition of The International Stock Exchange Group (TISEG) in June 2025, expanding into European and UK markets with 7.4% increase in listed securities
Risk Factors
- Section 31 fee suspension May 14, 2025; $0.00 per million temporary until FY 2026 legislation enacted, impacting regulatory revenue and costs
- Exposure to UK market via TISE Acquisition for $69.7 million in June 2025, with ongoing geopolitical uncertainty in Europe
- Supply chain shift: MIAX Futures migration off CME Globex platform June 30, 2025, eliminating related fees but requiring platform transition
- Competitive pressure from proprietary futures products causing inverted pricing with liquidity payments exceeding transaction fees in Futures segment
- High-cost debt extinguishment in August 2025: $140 million loan prepaid with $36 million prepayment premium, resulting in $107.7 million loss on extinguishment
Management Discussion & Analysis
- No details on segment performance available
- Cash flow, buybacks, dividends, and capex information not included
- Forward-looking outlook or risks not mentioned in excerpt
AI summary of the MIAX 10-K filed . Generated from the filing text; verify against the original.View on SEC EDGARHow to read a 10-K
AI 10-Q Quarterly Report Analysis
Latest 10-Q, quarter ended Jun 30, 2026
Management Discussion & Analysis
- Revenue, profitability, cash flow, capital deployment and outlook details unavailable
Risk Factors
- New executive trading plans: up to 59,667 shares subject to sale arrangements
- Equity withholding purchases: 91,950 shares acquired at $40.79 per share
- No senior-security defaults reported during the quarter
- No unregistered equity sales or proceeds reported during the quarter
AI summary of the MIAX 10-Q filed . Generated from the filing text; verify against the original.View on SEC EDGAR10-K vs 10-Q vs 8-K
AI 8-K Current Report Analysis
The most recent material events, by 8-K item
Item 2.02: Results of Operations and Financial Condition
- Investor Relations website designated for material nonpublic information disclosures under Regulation FD
- Investors should monitor MIAX’s website alongside SEC filings for potentially market-moving updates
Item 8.01: Other Events
- Litigation with Nasdaq fully resolved through dismissal with prejudice on July 20, 2026
- Company retains unrestricted freedom to operate, modify, and launch exchanges and trading platforms
Item 3.02: Unregistered Sales of Equity Securities
- Section contains only the filing signature page, not substantive Item 3.02 transaction details
- No unregistered equity issuance, purchasers, securities, or consideration identified in provided text
AI summaries of MIAX 8-K current reports filed with the SEC. What 8-K item codes mean
SignalX for MIAX
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- Fund moves. Which tracked funds opened, added or cut MIAX, by share count.
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Recent Insider Transactions (Form 4)
Latest reported trades by officers, directors and 10% owners
| Insider | Type | Date | Shares | Price |
|---|---|---|---|---|
| Schafer Douglas M. JR | M | Oct 2, 2026 | 40,000 | - |
| Schafer Douglas M. JR | Sell | Oct 2, 2026 | 40,000 | $33.34 |
| Schafer Douglas M. JR | M | Oct 2, 2026 | 40,000 | $12.00 |
| Jayabalan Harish | M | Sep 25, 2026 | 8,333 | - |
| Jayabalan Harish | M | Sep 25, 2026 | 8,333 | $12.00 |
| Brown Shelly | Sell | Sep 16, 2026 | 21,217 | $38.61 |
| Brown Shelly | F | Sep 11, 2026 | 16,283 | $42.54 |
| Gallagher Thomas P. | M | Sep 3, 2026 | 13,140 | $15.22 |
Financial SummaryXBRL
| Metric | FY2023 | FY2024 | FY2025 |
|---|---|---|---|
| Profitability | |||
| Revenue | - | $1.1B | $1.4B |
| Gross Profit | - | $275.6M | $430.5M |
| Operating Income | - | -$2.8M | $92.0M |
| Net Income | - | $102.1M | -$70.0M |
| Gross Margin | - | 24.2% | 31.6% |
| Op. Margin | - | -0.2% | 6.7% |
| Net Margin | - | 9.0% | -5.1% |
| Balance Sheet | |||
| Total Assets | - | $973.7M | $1.3B |
| Equity | $163.8M | $367.6M | $881.0M |
| ROE | - | 27.8% | -7.9% |
| Per Share | |||
| EPS | - | $1.39 | $-1.00 |
| Cash Flow | |||
| Operating CF | - | $111.4M | $167.8M |
| CapEx | $16.2M | $26.7M | $22.8M |
Source: XBRL data in MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX)'s 10-K filings on SEC EDGAR, in USD. Compare across companies →
13F Fund Holdings: Quarterly Trend
Latest: Q2 2026Aggregate MIAX share value held by 13F filers tracked by SignalX, by quarter.
Quarterly totals table
| Quarter | Funds | Total value |
|---|---|---|
| Q2 2026 | 26 | $889.0M |
| Q1 2026 | 29 | $650.3M |
| Q4 2025 | 23 | $441.9M |
| Q3 2025 | 23 | $308.9M |
- BlackRock+2.84M (+127%)
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- Vanguard Capital Management LLC+1.75M (+124%)
- State Street Corp+720.6K (+101%)
- T. Rowe Price Group+685.3K (+430%)
- Millennium Management−329.6K (-64%)
- Morgan Stanley−196.4K (-17%)
- Truist Financial−111.1K (-94%)
- Bank of America Corp−43.9K (-5%)
- Citigroup−28.1K (-27%)
- Citadel Advisors LLC−1.61M
- Renaissance Technologies LLC−271.5K
- Soros Fund Management−132.6K
- Blackstone Group−11.5K
- AQR Capital Management−8.5K
Source: 13F-HR filings on SEC EDGAR (aggregated from 101 fund-quarter rows). Reflects only 13F filers tracked by SignalX, not the full institutional ownership universe. How 13F filings work
MIAX filing archive
AI analysis pages for each 10-K, 10-Q and 8-K
10-K annual reports
10-Q quarterly reports
Latest 2026 SEC Filings: 10-K, 10-Q, 8-K & Form 4
| Form | Filing date | Period | Analysis | SEC |
|---|---|---|---|---|
| 4 | Oct 6, 2026 | - | - | - |
| 4 | Sep 29, 2026 | - | - | - |
| 4 | Sep 17, 2026 | - | - | - |
| 4 | Sep 11, 2026 | - | - | - |
| 4 | Sep 4, 2026 | - | - | - |
| 4 | Sep 4, 2026 | - | - | - |
| 4 | Sep 4, 2026 | - | - | - |
| 4 | Sep 4, 2026 | - | - | - |
| 4 | Sep 4, 2026 | - | - | - |
| 4 | Aug 20, 2026 | - | - | - |
| 4 | Aug 20, 2026 | - | - | - |
| 4 | Aug 19, 2026 | - | - | - |
| 4 | Aug 19, 2026 | - | - | - |
| SC 13G | Aug 14, 2026 | - | - | |
| 10-Q | Aug 7, 2026 | Jun 30, 2026 | Analysis | |
| 4 | Aug 6, 2026 | - | - | - |
| 4 | Aug 6, 2026 | - | - | - |
| 4 | Aug 6, 2026 | - | - | - |
| 4 | Aug 6, 2026 | - | - | - |
| 4 | Aug 6, 2026 | - | - | - |
| 4 | Aug 6, 2026 | - | - | - |
| 4 | Aug 6, 2026 | - | - | - |
| 8-K | Aug 5, 2026 | - | Analysis | - |
| SC 13G | Jul 29, 2026 | - | - | |
| 8-K | Jul 21, 2026 | - | Analysis | - |
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MIAX SEC filings: frequently asked questions
Are MIAX insiders buying or selling?
In the last 90 days, MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) officers, directors and 10% owners reported no open-market purchases and 21 open-market sales worth $29.0 million by 10 insiders on Form 4. Many insider sales are pre-planned or for taxes, so purchases usually carry more information.
Which institutions hold MIAX stock?
As of June 30, 2026, the largest MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) holders among the 13F filers tracked by SignalX were BlackRock ($188.5 million), Vanguard Portfolio Management LLC ($140.7 million), Vanguard Capital Management LLC ($117.6 million), Invesco Ltd ($75.1 million), State Street Corp ($53.2 million). 13F-HR reports are filed up to 45 days after each quarter ends.
What was MIAX's revenue in fiscal year 2025?
For the fiscal year ended December 31, 2025 (FY2025), MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) reported revenue of $1.4 billion (up 19.6% from FY2024) and a net loss of $70.0 million. Diluted EPS was -$1.00. The figures come from the XBRL data in the 10-K.
What are the main risks in MIAX's latest 10-K?
In the 10-K filed March 6, 2026, MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) flagged: Section 31 fee suspension May 14, 2025; $0.00 per million temporary until FY 2026 legislation enacted, impacting regulatory revenue and costs. Exposure to UK market via TISE Acquisition for $69.7 million in June 2025, with ongoing geopolitical uncertainty in Europe. (AI summary of the Risk Factors section.)
What did MIAX report in its latest 8-K?
MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) filed an 8-K on August 5, 2026 reporting Item 2.02 (Results of Operations and Financial Condition). Investor Relations website designated for material nonpublic information disclosures under Regulation FD.
What are the latest MIAX SEC filings?
MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) filed its latest 10-K annual report on March 6, 2026, a 10-Q quarterly report on August 7, 2026, an 8-K current report on August 5, 2026 and a Form 4 insider filing on October 6, 2026.
What is MIAX's SEC CIK number?
MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX)'s SEC Central Index Key (CIK) is 1438472. EDGAR lists every MIAX filing under that number.
Ask anything about MIAX
The research agent reads MIAX's filings, financials, insider trades and 13F holders, then answers with sources.