MoonLake stock jumps after FDA feedback clears path for sonelokimab filing without new HS trials
New York, Jan 8, 2026, 17:06 EST — After-hours MoonLake Immunotherapeutics shares jumped 27% to $14.34 on Thursday after the biotech said U.S. regulators supported a route to file its hidradenitis suppurativa treatment without doing more trials for the skin disease. The stock churned between $11.20 and $17.28, and roughly 24 million shares traded. The update is a big deal because it clears up a near-term unknown: whether MoonLake would need to pay for and run another late-stage study before it can seek approval. For a clinical-stage company with no product revenue, that sort of timing decision can jolt the
