Erasca rises after Merck cancer drug combo pact

ReutersMay 11, 2026 11:26 AM

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Shares of drug developer Erasca ERAS.O rise 8% to $10.92 premarket

Erasca says it has signed a clinical trial collaboration and supply agreement with Merck MRK.N to test its experimental cancer pill, ERAS-0015, alongside Merck's Keytruda

The trial will study the combination in patients with solid tumors caused by mutations in the RAS gene

Erasca will run the study, while Merck will supply Keytruda at no cost

Last month, Erasca said that a patient died in an early-stage trial of ERAS-0015

In the same trial, ERAS-0015 shrank tumors in 62% of lung cancer patients who had undergone prior treatments without any success

As of last close, ERAS up 172% YTD

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