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benzinga Corporate Catalyst Impact 65/100 ● positive

Ultragenyx FDA-Approved Treatment Shows Sustained Reduction in Cornstarch Intake

Sep 2, 2026, 2:41 PM UTC · Primary ticker $RARE

Ultragenyx announced positive 96-week Phase 3 data for its gene therapy GENGLYCOS (DTX401) for Glycogen Storage Disease Type Ia (GSDIa), demonstrating sustained reduction in cornstarch intake and improved patient outcomes. This reinforces the drug's efficacy and safety profile, which is already FDA-approved, potentially boosting its commercial success and market penetration.

Ultragenyx (RARE) has published 96-week Phase 3 data for its gene therapy GENGLYCOS (DTX401), showing sustained efficacy and safety in GSDIa patients. This is significant because the drug is already FDA-approved, and these long-term results validate its clinical benefits, including a 61% mean reduction in cornstarch intake and improved quality of life. This positive data strengthens the commercial outlook for GENGLYCOS, potentially leading to increased adoption and revenue for Ultragenyx. While the stock was slightly down on the day of publication, the long-term implications are positive, as it de-risks the therapy and could attract more investors. The key opportunity for traders is the potential for future revenue growth and market share expansion for RARE.

$RARE positive Positive long-term clinical trial data for approved drug
Source: benzinga
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