Ultragenyx is trading 8.1% up today at $26.85, rebounding after a volatile stretch tied to its Q1 2026 earnings miss and an ongoing securities class action headline from February 2026.
- The move comes as shares recover from prior weakness following a February 24, 2026, class action announcement that previously drove a more than 42% decline.
- The stock is gaining ground despite missing revenue and earnings forecasts in Q1 2026, a report that initially saw shares rise in after-hours trading before facing subsequent volatility.