Ultragenyx Pharmaceutical (RARE) Stock Jumps After Hours: Here's Why It Is Trending

9/18/2026
Impact: 85
Healthcare

Ultragenyx Pharmaceutical Inc. (NASDAQ: RARE) saw its stock rise 2.55% to $14.87 in after-hours trading following the FDA's full approval of FAYUVI, the first treatment for Sanfilippo syndrome Type A. The approval is based on nearly eight years of clinical data showing significant cognitive improvements in treated patients. Ultragenyx has a market capitalization of $1.43 billion, with a 52-week high of $39.89 and a low of $12.73, although the stock has fallen 50.19% over the past year.

AI summary, not financial advice

Share: