Form4insider filings, from the source

Company · CIK 0001515673 · SIC 2834 — Pharmaceutical Preparations · Nasdaq

Ultragenyx Pharmaceutical Inc. · RARE

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $20k · 2net −$20k
$10k$10k$100k$100k$1M$1MbuyssalesAug 28Sep 2Sep 7Sep 12Sep 18Sep 23Sep 28

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 15, 2026 SForm 4 →Sep 15, 6:57 pm EDTTheodore Alan HuizengaSVP, Chief Accounting Officer1,283$13.57$17,41067,863−1.86%10b5-1
Sep 3, 2026 SForm 4 →Sep 8, 12:29 pm EDTTheodore Alan HuizengaSVP, Chief Accounting Officer161$13.99$2,25269,146−0.23%

Reported at this company — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.