Rezolute Announces Results From Its Ongoing Open-Label Phase 3 upLIFT Study Of Ersodetug In Tumor Hyperinsulinism; Primary Efficacy Endpoint Has Been Achieved Based On Preliminary Results; Topline Results Expected By Mid-December 2026

The primary efficacy endpoint in the upLIFT study is the proportion of patients able to achieve at least a 50% reduction from baseline in glucose infusion rate (GIR), a measure of intravenous glucose dependency for underlying hypoglycemia. To achieve statistical significance for the endpoint, the lower bound of the 95% confidence interval for percent of patients responding must exceed 30%, which equates to at least 9 responders (≥56%), based on enrollment of 16 participants. To date, 13 participants have met the responder criterion, including 12 who also achieved a complete discontinuation of IV glucose. Three participants are still in the pivotal period of the study, including two who have not yet met the responder criterion. As previously reported, one participant discontinued the study early and chose to enter home hospice care, and died one week later due to cancer progression. This participant has been classified as a non-responder for purposes of the primary endpoint. Results for the completed study, including statistical analysis of the primary endpoint, are expected by mid-December 2026.

"We are thrilled with this outcome and what it means for individuals living with tumor hyperinsulinism," said Nevan Charles Elam, Founder and Chief Executive Officer of Rezolute. "Notably, these results substantially mirror the powerful outcomes that we have observed over the last few years in our expanded access program. We believe that we are well positioned to advance both congenital HI and tumor HI into the approval process next year and we look forward to discussions with FDA in the first quarter of 2027."

The 16 enrolled participants include four with non-islet cell tumors and 12 with insulin-secreting malignant islet cell tumors (insulinomas). Ersodetug has been well-tolerated to date in the pivotal and extension phases of the study, with no drug-related safety findings attributed to ersodetug.