13F Pro

SEC Form 4 reporting owner

Katz Michael J.

Katz Michael J. has filed 6 Form 4 transactions reported between February 15, 2026 and September 3, 2026, as Director of MNTN, Inc. and Chief Bus. and Prod. Officer of T-Mobile US, Inc..

Name as filed: Katz Michael J.

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$979K
1 lines
Companies
2
with Form 4 filings
Latest transaction
Sep 3, 2026
transaction date

Roles and reported holdings

  • MNTNMNTN, Inc.
    Sep 3, 2026

    Director

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

  • TMUST-Mobile US, Inc.
    Feb 15, 2026 – May 1, 2026

    Chief Bus. and Prod. Officer

    Held directly181,930 sh as of May 1, 2026 · Form 4

    24 months: $979K sold

Transaction history

All 6 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Sep 3, 2026MNTNDirectorGrant or awardCode A · direct29,717—Form 4
May 1, 2026TMUSChief Bus. and Prod. OfficerOpen-market saleCode S · direct5,000$979K@ $195.81Form 4
Feb 15, 2026TMUSChief Bus. and Prod. OfficerShares withheld for tax or exercise priceCode F · direct3,571$784K@ $219.50Form 4
Feb 15, 2026TMUSChief Bus. and Prod. OfficerGrant or awardCode A · direct9,076—Form 4
Feb 15, 2026TMUSChief Bus. and Prod. OfficerShares withheld for tax or exercise priceCode F · direct7,142$1.6M@ $219.50Form 4
Feb 15, 2026TMUSChief Bus. and Prod. OfficerGrant or awardCode A · direct32,365—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.