Ultragenyx Shares Fall After Phase 3 Aspire Study Misses Primary Endpoint
Ultragenyx (RARE) shares dropped 44.7% premarket after its Phase 3 Aspire study for apazunersen in Angelman syndrome missed primary and key secondary endpoints. Analysts downgraded the stock, with price targets lowered significantly. Shares fell below their 52-week low. According to the company, no meaningful differences were found between treatment and placebo groups.





