SEC Form 4 reporting owner

Rosenthal Arnon

Rosenthal Arnon has filed 7 Form 4 transactions reported between December 3, 2025 and September 3, 2026, as Chief Executive Officer of Alector, Inc..

Name as filed: Rosenthal Arnon

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$656K
4 lines
Companies
1
with Form 4 filings
Latest transaction
Sep 3, 2026
transaction date

Roles and reported holdings

  • ALECAlector, Inc.
    Dec 3, 2025 – Sep 3, 2026

    Chief Executive Officer

    Held directly2,294,600 sh as of Sep 3, 2026 · Form 4
    Held indirectly (latest line)1,002,500 sh as of Aug 19, 2026 · Form 4

    24 months: $656K sold

Transaction history

All 7 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Sep 3, 2026ALECChief Executive OfficerOpen-market saleCode S · direct72,606$193K@ $2.66Form 4
Aug 19, 2026ALECChief Executive OfficerGiftCode G · indirect350,000—Form 4
Aug 19, 2026ALECChief Executive OfficerGiftCode G · indirect1,050,000—Form 4
Jun 2, 2026ALECChief Executive OfficerOpen-market saleCode S · direct87,216$172K@ $1.97Form 4
Mar 13, 2026ALECChief Executive OfficerGrant or awardCode A · direct116,246—Form 4
Mar 2, 2026ALECChief Executive OfficerOpen-market saleCode S · direct81,864$174K@ $2.12Form 4
Dec 3, 2025ALECChief Executive OfficerOpen-market saleCode S · direct104,347$117K@ $1.12Form 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.