13F Pro

SEC Form 4 reporting owner

Evans Katie Seitz

Evans Katie Seitz has filed 12 Form 4 transactions reported between January 1, 2026 and September 11, 2026, as President, Operations of MAGNITE, INC..

Name as filed: Evans Katie Seitz

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$1.4M
3 lines
Companies
1
with Form 4 filings
Latest transaction
Sep 11, 2026
transaction date

Roles and reported holdings

  • MGNIMAGNITE, INC.
    Jan 1, 2026 – Sep 11, 2026

    President, Operations

    Held directly441,800 sh as of Sep 11, 2026 · Form 4

    24 months: $1.4M sold

Transaction history

All 12 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Sep 11, 2026MGNIOpen-market saleCode S · direct13,997$336K@ $24.00Form 4
Sep 9, 2026MGNIOpen-market saleCode S · direct11,100$260K@ $23.46Form 4
Sep 8, 2026MGNIOpen-market saleCode S · direct32,285$763K@ $23.63Form 4
Sep 8, 2026MGNIOption exerciseCode M · direct13,546$70K@ $5.16Form 4
Aug 15, 2026MGNIShares withheld for tax or exercise priceCode F · direct11,204$277K@ $24.73Form 4
Aug 6, 2026MGNIOption exerciseCode M · direct20,000$103K@ $5.16Form 4
May 15, 2026MGNIPresident, OperationsShares withheld for tax or exercise priceCode F · direct11,204$144K@ $12.82Form 4
Feb 15, 2026MGNIPresident, OperationsShares withheld for tax or exercise priceCode F · direct27,428$321K@ $11.70Form 4
Jan 9, 2026MGNIPresident, OperationsShares withheld for tax or exercise priceCode F · direct26,836$434K@ $16.17Form 4
Jan 9, 2026MGNIPresident, OperationsOption exerciseCode M · direct51,300—Form 4
Jan 1, 2026MGNIPresident, OperationsGrant or awardCode A · direct42,757—Form 4
Jan 1, 2026MGNIPresident, OperationsGrant or awardCode A · direct127,273—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.