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MIAX Miami International Holdings Inc.

Financials, filed as MIAMI INTL HLDGS INC (COM), Equity As of 2026 Q2 among managers we track Quote on Google Finance, opens in a new tab

Bought by 1 manager in 2026 Q2, sold by 1

  • 1 Owner
  • Max 3.3%
  • $291M
  • 1 add 1 exit

In 2026 Q2 Murray Stahl added to Miami International, while George Soros sold out.

Who owns this now

Largest portfolio weights among holders, up to 3.3% (Murray Stahl, Horizon Kinetics Asset Management). Not free-float ownership.

  1. Murray Stahl Add 3.3%

Who owns MIAX

Sorted by value, long equity only, as of 2026 Q2.

History
Murray Stahl, Horizon Kinetics Asset Management 3.3%, was 1.4% Add +127.2% 7,842,173 $291M History
George Soros, Soros Fund Management exited 2026 Q2 Last 2026 Q1 0.06% Exit −0.06% 132,600 $5.2M History

1 current, 1 exited last period, options excluded

Weight bar: held both quarters added sold at this quarter’s reported price

Insider trades

Open-market buys and sales by MIAX's executives, directors and 10% owners in the last 12 months, from their Form 4s

All MIAX insider trades
  • $723K bought by 1 insider
  • $2.2M sold by 1 insider outside a trading plan
  • $74.4M sold by 10 insiders under 10b5-1 plans
  1. Douglas M. Schafer Jr. EVP and CIO
    Planned sale
    $1.3M 40,000 shares at $33.34 9.4% of stake
    Traded Oct 2 Filed Oct 6
    ↗
  2. Shelly Brown EVP, Chief Strategy Officer
    Planned sale
    $819K 21,217 shares at $38.61 6.3% of stake
    Traded Sep 16 Filed Sep 17
    ↗
  3. Barbara J. Comly EVP, GC & Corporate Secretary
    Planned sale
    $1.8M 44,445 shares at $40.49 5% of stake
    Traded Sep 2 Filed Sep 4
    ↗
  4. Edward Deitzel EVP, CRO, CCO MIAX Exchanges
    Planned sale
    $464K 11,000 shares at $42.21 8.4% of stake
    Traded Sep 3 Filed Sep 4
    ↗
  5. Thomas P. Gallagher CEO
    Planned sale
    $2M 47,000 shares at $42.43 3.2% of stake
    Traded Sep 3 Filed Sep 4
    ↗
  6. Douglas M. Schafer Jr. EVP and CIO
    Planned sale
    $1.9M 48,000 shares at $40.48 11% of stake
    Traded Sep 2 Filed Sep 4
    ↗
  7. Judson Gray Teekell Director
    Planned sale
    $353K 8,545 shares at $41.34
    Traded Sep 2 Filed Sep 4
    ↗
  8. Thomas P. Gallagher CEO
    Planned sale
    $6.2M 149,700 shares at $41.13 9.5% of stake
    Traded Aug 19 Filed Aug 20
    ↗
  9. Cynthia Schwarzkopf Director
    Planned sale
    $214K 5,000 shares at $42.85 5.3% of stake
    Traded Aug 17 Filed Aug 19
    ↗
  10. Lance Emmons CFO
    Planned sale
    $1.5M 35,000 shares at $42.83 29% of stake
    Traded Aug 17 Filed Aug 19
    ↗
  11. Barbara J. Comly EVP, GC & Corporate Secretary
    Planned sale
    $2M 44,445 shares at $45.69 4.8% of stake
    Traded Aug 4 Filed Aug 6
    ↗
  12. Kurt M. Eckert Director
    Planned sale
    $49K 1,063 shares at $45.80 0.7% of stake
    Traded Aug 4 Filed Aug 6
    ↗
  13. Edward Deitzel EVP, CRO, CCO MIAX Exchanges
    Planned sale
    $504K 11,000 shares at $45.78 8.4% of stake
    Traded Aug 4 Filed Aug 6
    ↗
  14. Harish Jayabalan EVP, CISO and CRO
    Planned sale
    $918K 20,000 shares at $45.90 20% of stake
    Traded Aug 4 Filed Aug 6
    ↗
  15. Thomas P. Gallagher CEO
    Planned sale
    $2.2M 48,334 shares at $45.69 2.7% of stake
    Traded Aug 4 Filed Aug 6
    ↗

Also filed in the last 12 months, not counted as buying or selling: 81 option exercises, 36 stock grants, 20 share withholdings for taxes, 1 gift, and 1 other transaction.

Congress

1 member of Congress traded MIAX in the last three years: 1 buy and 0 sales.

All Congress trades
  1. Gilbert Ray Cisneros, Jr. D-CA-31 Buy $15K–$50K Mar 20 filed Apr 7

SEC filings

Recent issuer filings from EDGAR, 6 shown.

Filed Form Detail Links
SCHEDULE 13G — Filing Doc
10-Q Filing Doc
8-K 2.02,9.01 Filing Doc
SCHEDULE 13G — Filing Doc
8-K 8.01 Filing Doc
8-K 3.02 Filing Doc

Source: SEC EDGAR submissions, updated 5 days ago. All on EDGAR

Financials

US-GAAP annual figures by fiscal year, as tagged in Form 10-K. Each value links to its SEC filing.

Income statement

Metric FY2025
Revenue $1.36B
Gross profit $430.53M
Gross margin * 31.6%
Net income -$70.03M
Net margin * -5.1%

Balance sheet

Metric FY2025
Total current assets $855.21M
Total non-current assets * $404.21M
Total assets $1.26B
Total current liabilities $337.26M
Total non-current liabilities * $41.15M

Cash flow

Metric FY2025
Cash from operations $167.83M
Cash from investing -$101.33M
Cash from financing $214.77M
Net change in cash $281.19M

Source: SEC companyfacts (US-GAAP 10-K). A * marks a computed figure, not a single XBRL tag. Fiscal years are as the issuer labels them. Follow The Filings does not adjust or audit these figures.

Ownership over time

13Fs that reported it each quarter. Click a bar for that quarter’s holders.