13F Pro

SEC Form 4 reporting owner

Sibold William John

Sibold William John has filed 41 Form 4 transactions reported between December 3, 2025 and September 11, 2026, as President and CEO of MADRIGAL PHARMACEUTICALS, INC..

Name as filed: Sibold William John

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$10.5M
37 lines
Companies
1
with Form 4 filings
Latest transaction
Sep 11, 2026
transaction date

Roles and reported holdings

  • MDGLMADRIGAL PHARMACEUTICALS, INC.
    Dec 3, 2025 – Sep 11, 2026

    President and CEO

    Held directly197,746 sh as of Sep 11, 2026 · Form 4

    24 months: $10.5M sold

Transaction history

All 41 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Sep 11, 2026MDGLPresident and CEOOpen-market saleCode S · direct120$66K@ $546.38Form 4
Sep 11, 2026MDGLPresident and CEOOpen-market saleCode S · direct761$415K@ $544.83Form 4
Sep 11, 2026MDGLPresident and CEOOpen-market saleCode S · direct1,539$837K@ $544.02Form 4
Sep 11, 2026MDGLPresident and CEOOpen-market saleCode S · direct1,202$652K@ $542.60Form 4
Sep 11, 2026MDGLPresident and CEOOpen-market saleCode S · direct368$199K@ $541.64Form 4
Sep 11, 2026MDGLPresident and CEOOpen-market saleCode S · direct687$371K@ $540.59Form 4
Sep 11, 2026MDGLPresident and CEOOpen-market saleCode S · direct160$86K@ $537.62Form 4
Sep 11, 2026MDGLPresident and CEOOpen-market saleCode S · direct218$117K@ $535.94Form 4
Sep 11, 2026MDGLPresident and CEOOpen-market saleCode S · direct106$57K@ $534.06Form 4
Sep 11, 2026MDGLPresident and CEOOpen-market saleCode S · direct60$32K@ $533.09Form 4
Sep 9, 2026MDGLPresident and CEOOpen-market saleCode S · direct160$87K@ $542.55Form 4
Sep 9, 2026MDGLPresident and CEOOpen-market saleCode S · direct362$196K@ $541.65Form 4
Sep 9, 2026MDGLPresident and CEOOpen-market saleCode S · direct505$273K@ $540.19Form 4
Sep 9, 2026MDGLPresident and CEOOpen-market saleCode S · direct215$116K@ $539.03Form 4
Sep 9, 2026MDGLPresident and CEOOpen-market saleCode S · direct520$280K@ $538.30Form 4
Sep 9, 2026MDGLPresident and CEOOpen-market saleCode S · direct640$344K@ $537.17Form 4
Sep 9, 2026MDGLPresident and CEOOpen-market saleCode S · direct1,040$558K@ $536.11Form 4
Sep 9, 2026MDGLPresident and CEOOpen-market saleCode S · direct644$345K@ $535.27Form 4
Sep 9, 2026MDGLPresident and CEOOpen-market saleCode S · direct396$212K@ $534.20Form 4
Sep 9, 2026MDGLPresident and CEOOpen-market saleCode S · direct512$273K@ $533.09Form 4
Sep 9, 2026MDGLPresident and CEOOpen-market saleCode S · direct368$196K@ $531.99Form 4
Sep 9, 2026MDGLPresident and CEOOpen-market saleCode S · direct522$277K@ $530.23Form 4
Sep 9, 2026MDGLPresident and CEOOpen-market saleCode S · direct347$184K@ $529.27Form 4
Sep 9, 2026MDGLPresident and CEOOpen-market saleCode S · direct131$69K@ $527.88Form 4
Jul 20, 2026MDGLPresident and CEOOpen-market saleCode S · direct280$155K@ $555.05Form 4
Jul 20, 2026MDGLPresident and CEOOpen-market saleCode S · direct1$551@ $550.72Form 4
Jul 20, 2026MDGLPresident and CEOOpen-market saleCode S · direct153$84K@ $550.01Form 4
Jul 20, 2026MDGLPresident and CEOOpen-market saleCode S · direct47$26K@ $548.87Form 4
Jul 20, 2026MDGLPresident and CEOOpen-market saleCode S · direct680$372K@ $547.70Form 4
Jul 20, 2026MDGLPresident and CEOOpen-market saleCode S · direct269$147K@ $547.08Form 4
Jul 20, 2026MDGLPresident and CEOOpen-market saleCode S · direct275$150K@ $545.71Form 4
Jul 20, 2026MDGLPresident and CEOOpen-market saleCode S · direct545$297K@ $544.71Form 4
Jul 20, 2026MDGLPresident and CEOOpen-market saleCode S · direct110$60K@ $543.79Form 4
Jul 20, 2026MDGLPresident and CEOOpen-market saleCode S · direct140$76K@ $542.75Form 4
Jul 17, 2026MDGLPresident and CEOOption exerciseCode M · direct50,000—Form 4
Mar 6, 2026MDGLPresident and CEOOpen-market saleCode S · direct1,663$718K@ $431.94Form 4
Mar 4, 2026MDGLPresident and CEOGrant or awardCode A · direct18,743—Form 4
Mar 4, 2026MDGLPresident and CEOGrant or awardCode A · direct14,995—Form 4
Jan 26, 2026MDGLPresident and CEOOpen-market saleCode S · direct1,577$777K@ $492.42Form 4
Dec 4, 2025MDGLPresident and CEOOpen-market saleCode S · direct2,400$1.4M@ $575.34Form 4
Dec 3, 2025MDGLPresident and CEOOption exerciseCode M · direct50,000—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.