Form4.ai tracks every SEC insider trade in real time. See every RARE insider filing with a free account — no card.
See every RARE insider filing — free account, no card.
Free accountUltragenyx Pharmaceutical Inc. (RARE) has 3 SEC Form 4 insider filings on record in the last 90 days. No insider purchases were filed — 3 sales totalling $128K. Most recent filing: Oct. 19, 2026.
Open-market value, last 90 days
Form 4 filings by type, last 90 days
| Date | Insider | Trade | Value | Price since buy |
|---|---|---|---|---|
| Oct 19, 2026 SEC filing | Horn Howard Chief Financial Officer | Sold | $107,898 | — |
| Sep 15, 2026 SEC filing | Huizenga Theodore Alan SVP, Chief Accounting Officer | Sold | $17,410 | — |
| Sep 8, 2026 SEC filing | Huizenga Theodore Alan SVP, Chief Accounting Officer | Sold | $2,252 | — |
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Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.