13F Pro

SEC Form 4 reporting owner

Huizenga Theodore Alan

Huizenga Theodore Alan has filed 7 Form 4 transactions reported between December 29, 2025 and September 15, 2026, as SVP, Chief Accounting Officer of Ultragenyx Pharmaceutical Inc..

Name as filed: Huizenga Theodore Alan

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$57K
3 lines
Companies
1
with Form 4 filings
Latest transaction
Sep 15, 2026
transaction date

Roles and reported holdings

  • RAREUltragenyx Pharmaceutical Inc.
    Dec 29, 2025 – Sep 15, 2026

    SVP, Chief Accounting Officer

    Held directly67,863 sh as of Sep 15, 2026 · Form 4

    24 months: $57K sold

    1 line is priced far from RARE’s market price that day, so the filing may concern a different security. Left out of totals and holdings; see the filings.

Transaction history

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

DateCompanyTypeSharesValueFiling
Sep 15, 2026RARESVP, Chief Accounting OfficerOpen-market saleCode S · direct1,283$17K@ $13.57Form 4
Sep 3, 2026RARESVP, Chief Accounting OfficerOpen-market saleCode S · direct161$2K@ $13.99Form 4
Apr 22, 2026RARESVP, Chief Accounting OfficerGrant or awardCode A · direct7,348—Form 4
Apr 22, 2026RARESVP, Chief Accounting OfficerGrant or awardCode A · direct20,241—Form 4
Mar 2, 2026RARESVP, Chief Accounting OfficerOpen-market saleCode S · direct1,632$37K@ $22.80Form 4
Mar 2, 2026RARESVP, Chief Accounting OfficerShares withheld for tax or exercise priceCode F · direct148$3K@ $23.39Form 4
Dec 29, 2025RARESVP, Chief Accounting OfficerOpen-market saleCode S · directPrice far from market; may be another security85$3K@ $34.38Form 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.

1 open-market line is priced outside 0.67×–1.5× of the stock’s closing price that day. A gap that large usually means the filing reports a different security than the company it is filed under, so those lines are shown but left out of totals and holdings.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.