13F Pro

SEC Form 4 reporting owner

Mason Mark

Mason Mark has filed 11 Form 4 transactions reported between December 4, 2025 and September 10, 2026, as Director of MICROSOFT CORP and Chief Financial Officer of CITIGROUP INC.

Name as filed: Mason Mark

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$416K
2 lines
Companies
2
with Form 4 filings
Latest transaction
Sep 10, 2026
transaction date

Roles and reported holdings

  • MSFTMICROSOFT CORP
    Dec 4, 2025 – Sep 10, 2026

    Director

    No common-stock holding reported on a purchase, sale, gift or withholding line.

  • CCITIGROUP INC
    Jan 20, 2026 – Feb 20, 2026

    Chief Financial Officer

    Held directly233,789 sh as of Feb 20, 2026 · Form 4

    24 months: $416K sold

Transaction history

All 11 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Sep 10, 2026MSFTDirectorGrant or awardCode A · direct1—Form 4
Sep 5, 2026MSFTDirectorGrant or awardCode A · direct195—Form 4
Jun 11, 2026MSFTDirectorGrant or awardCode A · direct1—Form 4
Jun 5, 2026MSFTDirectorGrant or awardCode A · direct231—Form 4
Feb 20, 2026CChief Financial OfficerGrant or awardCode A · direct39,347—Form 4
Feb 20, 2026CChief Financial OfficerOpen-market saleCode S · direct2,000$230K@ $114.96Form 4
Feb 20, 2026CChief Financial OfficerOpen-market saleCode S · direct1,627$186K@ $114.40Form 4
Feb 11, 2026CChief Financial OfficerGrant or awardCode A · direct52,367—Form 4
Jan 30, 2026MSFTDirectorGrant or awardCode A · direct145—Form 4
Jan 20, 2026CChief Financial OfficerShares withheld for tax or exercise priceCode F · direct29,210$3.4M@ $118.04Form 4
Dec 4, 2025MSFTDirectorGrant or awardCode A · direct130—Form 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.