13F Pro

SEC Form 4 reporting owner

Lu Hongbo

Lu Hongbo has filed 6 Form 4 transactions reported between December 16, 2025 and June 15, 2026, as Director of Zenas BioPharma, Inc. and Director of ARROWHEAD PHARMACEUTICALS, INC..

Name as filed: Lu Hongbo

Open-market buys, 24 mo
$2.2M
3 lines
Open-market sales, 24 mo
$228K
1 lines
Companies
2
with Form 4 filings
Latest transaction
Jun 15, 2026
transaction date

Roles and reported holdings

  • ZBIOZenas BioPharma, Inc.
    Feb 11, 2026 – Jun 15, 2026

    Director

    Held indirectly (latest line)426,736 sh as of Mar 31, 2026 · Form 4

    24 months: $2.2M bought

  • ARWRARROWHEAD PHARMACEUTICALS, INC.
    Dec 16, 2025 – May 12, 2026

    Director

    Held directly52,012 sh as of May 12, 2026 · Form 4

    24 months: $228K sold

Transaction history

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

DateCompanyTypeSharesValueFiling
Jun 15, 2026ZBIODirectorGrant or awardCode A · direct18,500—Form 4
May 12, 2026ARWRDirectorOpen-market saleCode S · direct2,970$228K@ $76.88Form 4
Mar 31, 2026ZBIODirectorOpen-market purchaseCode P · indirect3,768$70K@ $18.63Form 4
Mar 31, 2026ZBIODirectorOpen-market purchaseCode P · indirect75,000$1.5M@ $20.00Form 4
Feb 11, 2026ZBIODirectorOpen-market purchaseCode P · indirect25,985$585K@ $22.50Form 4
Dec 16, 2025ARWRDirectorGrant or awardCode A · direct7,819—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.