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Corporate Score 48 Bullish

Nektar Therapeutics Shares Surge on Positive Phase 2b Alopecia Trial Results

Apr 20, 2026 23:33 UTC
NKTR
Medium term

Nektar Therapeutics saw its stock price climb over 18% following successful clinical data for its hair-loss treatment. The company now plans to advance the drug candidate, rezpegaldesleukin, into later-stage trials.

  • NKTR shares increased by more than 18% in a single session
  • Phase 2b trial for rezpegaldesleukin showed positive hair regrowth in severe alopecia patients
  • The 52-week study corrected previous failures caused by enrollment errors
  • The drug candidate will now move into later-stage clinical trials
  • The treatment targets a common autoimmune disorder affecting millions in the U.S.

Nektar Therapeutics (NASDAQ: NKTR) experienced a significant rally on Monday after announcing promising results from a Phase 2b clinical trial of rezpegaldesleukin, a drug designed to treat severe to very severe alopecia areata. The positive data has restored investor confidence in the company's immunology pipeline. The successful outcome marks a critical turnaround for the drug candidate. A previous 36-week study had failed to demonstrate a statistically significant benefit, a result the company attributed to enrollment errors involving four ineligible patients. By excluding those individuals and extending the study duration to 52 weeks, Nektar was able to demonstrate that responding patients grew more hair over time. As a clinical-stage biotech, Nektar's progress with rezpegaldesleukin is a pivotal milestone. Alopecia areata is a common autoimmune disorder affecting millions of people in the United States, representing a substantial addressable market if the drug reaches commercialization. Following these results, Nektar confirmed it will advance the drug into later-stage trials. The market responded aggressively to the news, with shares thundering higher as investors bet on the drug's potential to move toward regulatory approval.

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