13F Pro

SEC Form 4 reporting owner

JANA Partners Management, LP

JANA Partners Management, LP has filed 12 Form 4 transactions reported between February 6, 2026 and June 9, 2026, as 10% owner of Rapid7, Inc., Director of MERCURY SYSTEMS INC and Director of TreeHouse Foods, Inc..

Name as filed: JANA Partners Management, LP

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$121.8M
5 lines
Companies
3
with Form 4 filings
Latest transaction
Jun 9, 2026
transaction date

Roles and reported holdings

  • RPDRapid7, Inc.
    Jun 9, 2026

    10% owner

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

  • MRCYMERCURY SYSTEMS INC
    Feb 9, 2026 – Mar 4, 2026

    Director

    Held indirectly (latest line)4,114,618 sh as of Mar 4, 2026 · Form 4

    24 months: $73.8M sold

  • THSTreeHouse Foods, Inc.
    Feb 6, 2026 – Feb 11, 2026

    Director

    Held indirectly (latest line)3,862,116 sh as of Feb 10, 2026 · Form 4

    24 months: $48.0M sold

Transaction history

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

DateCompanyTypeSharesValueFiling
Jun 9, 2026RPD10% ownerOther acquisition or dispositionCode J · indirect15,208—Form 4
Mar 4, 2026MRCYDirectorOpen-market saleCode S · indirect100,899$9.0M@ $89.68Form 4
Mar 3, 2026MRCYDirectorOpen-market saleCode S · indirect168,648$15.2M@ $90.12Form 4
Mar 2, 2026MRCYDirectorOpen-market saleCode S · indirect182,510$17.2M@ $94.05Form 4
Feb 11, 2026THSDirectorOption exerciseCode M · indirect7,727—Form 4
Feb 11, 2026THSDirectorDisposition to issuerCode D · indirect3,862,116—Form 4
Feb 10, 2026THSDirectorOpen-market saleCode S · indirect1,959,221$48.0M@ $24.48Form 4
Feb 9, 2026THSDirectorOther acquisition or dispositionCode J · indirect22,028—Form 4
Feb 9, 2026THSDirectorOther acquisition or dispositionCode J · indirect474,950—Form 4
Feb 9, 2026MRCYDirectorOpen-market saleCode S · indirect400,000$32.4M@ $81.00Form 4
Feb 6, 2026THSDirectorOther acquisition or dispositionCode J · indirect24,834—Form 4
Feb 6, 2026THSDirectorOther acquisition or dispositionCode J · indirect133,790—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.