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High materiality7/10

Nektar advances rezpegaldesleukin with Phase 3 ZENITH AD trials in atopic dermatitis

Jul 21, 2026, 7:04 AM EDT1 sourcesAI-analyzed
Why it may matterVerify against the original reporting

Phase 3 initiation signals progression of a potentially transformative asset (rezpegaldesleukin) with a large 1,530-patient program and US/EU registration plans. While success is not guaranteed, milestone timing (mid-2028 readouts, 2029 BLA) provides meaningful optionality; historically, such pipeline progress has driven re-ratings unless setbacks emerge.

AI summary

What happened, with direct paths to the underlying reporting

Nektar Therapeutics announced two global registrational Phase 3 trials (ZENITH AD-1 and AD-2) for rezpegaldesleukin in moderate-to-severe atopic dermatitis, with a third trial (AD-3) for experienced patients. The program targets 1,530 patients across NA/ Europe/ APAC, with topline data expected mid-2028 and a 2029 BLA submission window, potentially establishing a first-in-class regulatory T-cell mechanism if successful.

  • Nektar advances rezpegaldesleukin with two global Phase 3 ZENITH AD trials.
  • Phase 3 rests on compelling Phase 2b data showing strong EASI-75 gains.
  • ZENITH AD-1/AD-2 enroll naive; AD-3 enrolls experienced patients; topline mid-2028.
  • Topline data mid-2028; BLA submission targeted for 2029.
  • Rezpegaldesleukin is a first-in-class regulatory T-cell stimulator targeting the IL-2 receptor.

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