RARE SEC Form 4 filings
Ultragenyx Pharmaceutical Inc. Latest Insider Trading Activity
Our insider trading activity tracker for Ultragenyx Pharmaceutical Inc. shows 12 total open-market insider transactions for RARE over the past 372 days. The most recent displayed transaction was on October 15, 2026, when Horn Howard (Ultragenyx Pharmaceutical Inc. Chief Financial Officer) reported a sale of 7,066 shares at $15.27 per share. This page shows up to the 10 most recent SEC Form 4 filing records on a 6-hour delay. Sign up for real-time updates and access to 20 years of historic insider trading data.
Insider Trading For RARE Charted on Daily Candles. Scroll left or zoom out to load earlier candles (up to 2 years).
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| Ticker | Filing Date | Transaction Date | Company | Insider | Title | Transaction | Trade Count | Shares | Avg. Price | Total Value | Position Size Change | SEC Filing |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting RARE | 2026-10-19 | 2026-10-15 | Ultragenyx Pharmaceutical Inc. | Horn Howard | Chief Financial Officer | Sell | 1 | 7,066 | $15.27 | $107,897.82 | 7.34% | View Filing |
| 10b5-1: Scheduled Form 4 Transaction RARE | 2026-09-15 | 2026-09-15 | Ultragenyx Pharmaceutical Inc. | Huizenga Theodore Alan | SVP, Chief Accounting Officer | Sell | 1 | 1,283 | $13.57 | $17,410.31 | 1.86% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting RARE | 2026-09-08 | 2026-09-03 | Ultragenyx Pharmaceutical Inc. | Huizenga Theodore Alan | SVP, Chief Accounting Officer | Sell | 1 | 161 | $13.99 | $2,252.39 | 0.23% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. RARE | 2026-06-15 | 2026-06-15 | Ultragenyx Pharmaceutical Inc. | Sanders Corazon (Corsee) D. | Director | Sell | 1 | 2,000 | $25.05 | $50,100.00 | 8.66% | View Filing |
| 10b5-1: Scheduled Form 4 Transaction RARE | 2026-06-15 | 2026-06-15 | Ultragenyx Pharmaceutical Inc. | Parschauer Karah Herdman | EVP and Chief Legal Officer | Sell | 1 | 1,899 | $24.62 | $46,753.38 | 1.97% | View Filing |
| 10b5-1: Scheduled Form 4 Transaction RARE | 2026-06-01 | 2026-06-01 | Ultragenyx Pharmaceutical Inc. | Horn Howard | Chief Financial Officer | Sell | 1 | 4,653 | $23.77 | $110,601.81 | 4.22% | View Filing |
| 10b5-1: Scheduled Form 4 Transaction RARE | 2026-03-03 | 2026-03-03 | Ultragenyx Pharmaceutical Inc. | Horn Howard | Chief Financial Officer | Sell | 3 | 10,044 | $22.65 | $227,538.26 | 3.70% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting RARE | 2026-03-03 | 2026-03-02 | Ultragenyx Pharmaceutical Inc. | Harris Erik | EVP & Chief Commercial Officer | Sell | 1 | 10,539 | $22.80 | $240,289.20 | 10.53% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting RARE | 2026-03-03 | 2026-03-02 | Ultragenyx Pharmaceutical Inc. | Huizenga Theodore Alan | SVP, Chief Accounting Officer | Sell | 1 | 1,632 | $22.80 | $37,209.60 | 3.24% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting RARE | 2025-10-14 | 2025-10-13 | Ultragenyx Pharmaceutical Inc. | Horn Howard | Chief Financial Officer | Sell | 1 | 7,942 | $31.51 | $250,252.42 | 7.48% | View Filing |
⚠️ THE SAMPLE ABOVE IS DEFERRED BY 6 HOURS ⚠️
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Alerts are based on public SEC filings and are provided for informational purposes only; they do not constitute financial advice.