SEC Form 4 reporting owner

Horn Howard

Horn Howard has filed 14 Form 4 transactions reported between December 10, 2025 and August 3, 2026, as Chief Financial Officer of Ultragenyx Pharmaceutical Inc..

Name as filed: Horn Howard

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$1.1M

11 lines

Companies

with Form 4 filings

Latest transaction

Aug 3, 2026

transaction date

Roles and reported holdings

RAREUltragenyx Pharmaceutical Inc.
Dec 10, 2025 – Aug 3, 2026
Chief Financial Officer
Held directly96,295 sh as of Aug 3, 2026 · Form 4
24 months: $1.1M sold

Transaction history

All 14 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Aug 3, 2026	RAREChief Financial Officer	Open-market saleCode S · direct	4,696	$24.92	$117K@ $24.92	96,295	Form 4
Jul 1, 2026	RAREChief Financial Officer	Open-market saleCode S · direct	4,698	$33.13	$156K@ $33.13	100,991	Form 4
Jun 1, 2026	RAREChief Financial Officer	Open-market saleCode S · direct	4,653	$23.77	$111K@ $23.77	105,689	Form 4
May 1, 2026	RAREChief Financial Officer	Open-market saleCode S · direct	4,683	$24.90	$117K@ $24.90	110,342	Form 4
Apr 16, 2026	RAREChief Financial Officer	Grant or awardCode A · direct	59,952	—	—	59,952	Form 4
Apr 16, 2026	RAREChief Financial Officer	Grant or awardCode A · direct	34,674	—	—	115,025	Form 4
Apr 1, 2026	RAREChief Financial Officer	Open-market saleCode S · direct	4,683	$20.97	$98K@ $20.97	80,351	Form 4
Mar 3, 2026	RAREChief Financial Officer	Open-market saleCode S · direct	1,635	$22.40	$37K@ $22.40	85,034	Form 4
Mar 2, 2026	RAREChief Financial Officer	Open-market saleCode S · direct	3,119	$22.54	$70K@ $22.54	86,669	Form 4
Mar 2, 2026	RAREChief Financial Officer	Open-market saleCode S · direct	5,290	$22.80	$121K@ $22.80	89,788	Form 4
Mar 1, 2026	RAREChief Financial Officer	Grant or awardCode A · direct	6,143	—	—	95,078	Form 4
Feb 2, 2026	RAREChief Financial Officer	Open-market saleCode S · direct	3,061	$23.56	$72K@ $23.56	88,935	Form 4
Jan 2, 2026	RAREChief Financial Officer	Open-market saleCode S · direct	3,150	$22.84	$72K@ $22.84	91,996	Form 4
Dec 10, 2025	RAREChief Financial Officer	Open-market saleCode S · direct	3,081	$36.38	$112K@ $36.38	95,146	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.