WELIREG (belzutifan) + LENVIMA (lenvatinib)

Previously treated advanced renal cell carcinoma · Adults with advanced renal cell carcinoma with a clear cell component following a PD-1 or PD-L1 inhibitor

MRK · Merck

Full timeline

4 milestones

FDA decisions expected

FDA assigned an October 4, 2026 PDUFA target action date to both supplemental applications for WELIREG plus LENVIMA.

Merck — LITESPARK-011 results and PDUFA date↗

FDA acceptance and detailed Phase 3 results were reported

Merck and Eisai said FDA accepted the two sNDAs. In LITESPARK-011, WELIREG plus LENVIMA reduced the risk of progression or death by 30% versus cabozantinib.

Merck — LITESPARK-011 results and FDA acceptance↗

LITESPARK-011 met its progression-free survival endpoint

The Phase 3 study showed a statistically significant and clinically meaningful improvement in progression-free survival versus cabozantinib at the first interim analysis.

Merck — Positive topline LITESPARK-011 results↗

Phase 3 LITESPARK-011 study started

The pivotal trial began evaluating belzutifan plus lenvatinib against cabozantinib in advanced clear-cell renal cell carcinoma after prior PD-1/PD-L1 therapy.

ClinicalTrials.gov — LITESPARK-011 study record (NCT04586231)↗

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Information for research purposes only · Dates can change · Last updated Oct 1, 2026