13F Pro

SEC Form 4 reporting owner

Ballhaus William L

Ballhaus William L has filed 18 Form 4 transactions reported between August 14, 2026 and August 26, 2026, as Chairman, President & CEO of MERCURY SYSTEMS INC.

Name as filed: Ballhaus William L

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$37.7M
12 lines
Companies
1
with Form 4 filings
Latest transaction
Aug 26, 2026
transaction date

Roles and reported holdings

  • MRCYMERCURY SYSTEMS INC
    Aug 14, 2026 – Aug 26, 2026

    Chairman, President & CEO

    Held directly361,822 sh as of Aug 26, 2026 · Form 4

    24 months: $37.7M sold

Transaction history

All 18 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Aug 26, 2026MRCYChairman, President & CEOOpen-market saleCode S · direct10,814$970K@ $89.74Form 4
Aug 26, 2026MRCYChairman, President & CEOOpen-market saleCode S · direct38,276$3.4M@ $88.91Form 4
Aug 26, 2026MRCYChairman, President & CEOOption exerciseCode M · direct68,476$2.9M@ $43.00Form 4
Aug 25, 2026MRCYChairman, President & CEOOpen-market saleCode S · direct3,448$303K@ $87.99Form 4
Aug 25, 2026MRCYChairman, President & CEOOpen-market saleCode S · direct107,628$9.4M@ $87.09Form 4
Aug 25, 2026MRCYChairman, President & CEOOption exerciseCode M · direct153,676$6.6M@ $43.00Form 4
Aug 24, 2026MRCYChairman, President & CEOOpen-market saleCode S · direct2,738$248K@ $90.60Form 4
Aug 24, 2026MRCYChairman, President & CEOOpen-market saleCode S · direct105,471$9.4M@ $89.47Form 4
Aug 24, 2026MRCYChairman, President & CEOOption exerciseCode M · direct11,348$488K@ $43.00Form 4
Aug 24, 2026MRCYChairman, President & CEOOption exerciseCode M · direct140,650$5.9M@ $42.00Form 4
Aug 21, 2026MRCYChairman, President & CEOOpen-market saleCode S · direct204$19K@ $93.51Form 4
Aug 21, 2026MRCYChairman, President & CEOOpen-market saleCode S · direct64,796$6.0M@ $92.40Form 4
Aug 21, 2026MRCYChairman, President & CEOOption exerciseCode M · direct92,850$3.9M@ $42.00Form 4
Aug 20, 2026MRCYChairman, President & CEOOpen-market saleCode S · direct22,010$2.1M@ $97.67Form 4
Aug 19, 2026MRCYChairman, President & CEOOpen-market saleCode S · direct26,802$2.7M@ $100.31Form 4
Aug 18, 2026MRCYChairman, President & CEOOpen-market saleCode S · direct24,144$2.7M@ $111.36Form 4
Aug 17, 2026MRCYChairman, President & CEOOpen-market saleCode S · direct3,536$389K@ $109.95Form 4
Aug 14, 2026MRCYChairman, President & CEODisposition to issuerCode D · direct70,287—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.