SEC Form 4 reporting owner

O'Brien Patrick

O'Brien Patrick has filed 18 Form 4 transactions reported between December 31, 2025 and June 23, 2026, as Chief Operating Officer of GREENLIGHT CAPITAL RE, LTD. and COO of ARROWHEAD PHARMACEUTICALS, INC..

Name as filed: O'Brien Patrick · O'BRIEN PATRICK

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$3.1M
12 lines
Companies
2
with Form 4 filings
Latest transaction
Jun 23, 2026
transaction date

Roles and reported holdings

  • GLREGREENLIGHT CAPITAL RE, LTD.
    Mar 9, 2026 – Jun 23, 2026

    Chief Operating Officer

    Held directly208,633 sh as of Jun 23, 2026 · Form 4

    24 months: $50K sold

  • ARWRARROWHEAD PHARMACEUTICALS, INC.
    Dec 31, 2025 – Jan 6, 2026

    COO

    Held directly472,848 sh as of Jan 6, 2026 · Form 4

    24 months: $3.1M sold

Transaction history

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

DateCompanyTypeSharesValueFiling
Jun 23, 2026GLREChief Operating OfficerOpen-market saleCode S · direct3,026$50K@ $16.36Form 4
Mar 13, 2026GLREChief Operating OfficerGrant or awardCode A · direct9,273—Form 4
Mar 9, 2026GLREChief Operating OfficerGrant or awardCode A · direct31,961—Form 4
Jan 6, 2026ARWRCOOGrant or awardCode A · direct75,000—Form 4
Jan 6, 2026ARWRCOOGiftCode G · direct440—Form 4
Jan 6, 2026ARWRCOOGiftCode G · direct540—Form 4
Jan 5, 2026ARWRCOOOpen-market saleCode S · direct46$3K@ $68.00Form 4
Jan 5, 2026ARWRCOOOpen-market saleCode S · direct2,336$150K@ $64.04Form 4
Jan 5, 2026ARWRCOOOpen-market saleCode S · direct5,873$369K@ $62.91Form 4
Jan 5, 2026ARWRCOOOpen-market saleCode S · direct600$37K@ $61.12Form 4
Jan 5, 2026ARWRCOOOpen-market saleCode S · direct313$21K@ $68.00Form 4
Jan 5, 2026ARWRCOOOpen-market saleCode S · direct900$59K@ $66.01Form 4
Jan 5, 2026ARWRCOOOpen-market saleCode S · direct2,700$174K@ $64.44Form 4
Jan 5, 2026ARWRCOOOpen-market saleCode S · direct11,842$756K@ $63.84Form 4
Jan 5, 2026ARWRCOOOpen-market saleCode S · direct13,451$847K@ $62.96Form 4
Jan 5, 2026ARWRCOOOpen-market saleCode S · direct6,164$384K@ $62.23Form 4
Jan 5, 2026ARWRCOOOpen-market saleCode S · direct4,368$267K@ $61.20Form 4
Dec 31, 2025ARWRCOOGiftCode G · direct560—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.