RARE insider trading — Ultragenyx Pharmaceutical Inc.
Over the last 90 days, insiders at Ultragenyx Pharmaceutical Inc. (RARE) made 0 open-market purchases worth $0 and 1 open-market sale worth $2K, making them net sellers by $2K. The largest sale was by Huizenga Theodore Alan (SVP, Chief Accounting Officer), who sold 161 shares for $2K on Sep 3, 2026.
Updated Oct 16, 2026.
Recent RARE insider transactions
Every Form 4 filed by Ultragenyx Pharmaceutical Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Sep 15, 2026 | Huizenga Theodore Alan | SVP, Chief Accounting Officer | S · Sale · 10b5-1 | Direct | 1,283 | $13.57 | $17K | Form 4 |
| Sep 3, 2026 | Huizenga Theodore Alan | SVP, Chief Accounting Officer | S · Sale | Direct | 161 | $13.99 | $2K | Form 4 |
| Aug 3, 2026 | Parschauer Karah Herdman | EVP and Chief Legal Officer | S · Sale · 10b5-1 | Direct | 1,900 | $24.92 | $47K | Form 4 |
| Aug 3, 2026 | Horn Howard | Chief Financial Officer | S · Sale · 10b5-1 | Direct | 4,696 | $24.92 | $117K | Form 4 |
RARE insider trading FAQ
Are insiders buying RARE stock?
Not on the open market. In the last 90 days, Ultragenyx Pharmaceutical Inc. insiders made no open-market purchases, and 1 open-market sale totaling $2K. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading RARE?
Recent sellers: Huizenga Theodore Alan.
Where does RARE insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.