13F Pro

SEC Form 4 reporting owner

Schafer Douglas M. JR

Schafer Douglas M. JR has filed 16 Form 4 transactions reported between February 10, 2026 and September 2, 2026, as EVP and CIO of MIAMI INTERNATIONAL HOLDINGS, INC..

Name as filed: Schafer Douglas M. JR

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$3.9M
2 lines
Companies
1
with Form 4 filings
Latest transaction
Sep 2, 2026
transaction date

Roles and reported holdings

  • MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Feb 10, 2026 – Sep 2, 2026

    EVP and CIO

    Held directly387,414 sh as of Sep 2, 2026 · Form 4

    24 months: $3.9M sold

Transaction history

All 16 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Sep 2, 2026MIAXEVP and CIOOpen-market saleCode S · direct48,000$1.9M@ $40.48Form 4
Sep 2, 2026MIAXEVP and CIOOption exerciseCode M · direct4,666$56K@ $12.00Form 4
Sep 2, 2026MIAXEVP and CIOOption exerciseCode M · direct43,334$520K@ $12.00Form 4
Aug 4, 2026MIAXEVP and CIOOption exerciseCode M · direct48,000$576K@ $12.00Form 4
Jul 2, 2026MIAXEVP and CIOOpen-market saleCode S · direct48,000$2.0M@ $41.22Form 4
Jul 2, 2026MIAXEVP and CIOOption exerciseCode M · direct42,000$504K@ $12.00Form 4
Jul 2, 2026MIAXEVP and CIOOption exerciseCode M · direct6,000$72K@ $12.00Form 4
Jun 16, 2026MIAXEVP and CIOGrant or awardCode A · direct21,481—Form 4
Jun 16, 2026MIAXEVP and CIOGrant or awardCode A · direct2,485—Form 4
Jun 16, 2026MIAXEVP and CIOGrant or awardCode A · direct23,298—Form 4
Jun 11, 2026MIAXEVP and CIOShares withheld for tax or exercise priceCode F · direct32,565$1.3M@ $40.79Form 4
Jun 2, 2026MIAXEVP and CIOOption exerciseCode M · direct48,000$576K@ $12.00Form 4
May 4, 2026MIAXEVP and CIOOption exerciseCode M · direct48,000$576K@ $12.00Form 4
Mar 17, 2026MIAXEVP and CIOOption exerciseCode M · direct48,000$576K@ $12.00Form 4
Feb 18, 2026MIAXEVP and CIOShares withheld for tax or exercise priceCode F · direct32,565$1.3M@ $40.89Form 4
Feb 10, 2026MIAXEVP and CIOShares withheld for tax or exercise priceCode F · direct108,550$4.5M@ $41.33Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.