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NKTR Investor Alert: Nektar Therapeutics Securities Fraud Lawsuit - Investors With Losses May Seek to Lead the Class Action After Allegedly Failing Clinical Enrollment Standards: Levi & Korsinsky

Key Takeaway: Nektar Therapeutics is facing a securities class action lawsuit due to alleged failures in patient enrollment standards for its Phase 2b REZOLVE-AA trial. The lawsuit claims that four ineligible patients were included in the trial, which compromised the study's primary endpoint. Nektar's stock dropped significantly following the disclosure of these issues, raising concerns about the integrity of its clinical trial processes.
Price reaction · baseline $81.26 (2026-04-14 close) · hit after-hours · 5 other NKTR headline(s) in the window, move may be shared
day 0 close · peak
+2.4%

Market Sentiment Analysis

CONCERNS & RISKS

  • Nektar's trial included ineligible patients, violating enrollment standards.
  • The company's stock fell significantly after revealing the enrollment issues.
  • Management's assurances about protocol adherence were misleading.
  • The trial's primary endpoint narrowly missed statistical significance due to these failures.

BiopharmaWatch Analysis

From our catalyst data and publicly available data · not financial advice
Best trade, last catalyst
+186%
120-day peak, hindsight
Typical move
10.2%
average across 4 past catalysts
Cash runway
~40 mo
Minimal dilution risk
Lead asset
Rezpegaldesleukin
Phase 3 · Moderate-to-Severe Atopic Dermatitis

Full Press Release Details

Alert: Claims Focus onAllegedMisrepresentations About REZOLVE-AA Patient Enrollment Compliance
NEW YORK,April 15, 2026/PRNewswire/ -- Levi & Korsinsky, LLP reminds purchasers of Nektar Therapeutics (NASDAQ:NKTR) securities of a pending securities class action.
THE CASE: A class action seeks to recover damages for investors who purchased Nektar securities between February 26, 2025 and December 15, 2025.
YOUR OPTIONS: You may be entitled to compensation without payment of any out-of-pocket fees.See if you can recover lossesor contact Joseph E. Levi, Esq. at[email protected]or ☎(212) 363-7500.
Nektar shares fell $4.14 per share, or 7.77%, closing at $49.16 on December 16, 2025, after the Company disclosed that four patients with major study eligibility violations had been included in its pivotal REZOLVE-AA trial. Investors have until May 5, 2026 to seek lead plaintiff status.

How a Biopharmaceutical Trial's Enrollment ProcessAllegedlyBroke Down

A biopharmaceutical company's clinical trial results are only as reliable as the patients enrolled in it. For the Phase 2b REZOLVE-AA trial evaluating rezpegaldesleukin in alopecia areata, the protocol required strict screening: patients needed a SALT score between 50 and 100 indicating severe-to-very-severe disease, stable disease for at least six months, and completion of an eight-week washout period from prior alopecia areata medications. These criteria existed because recently diagnosed patients can experience unpredictable autoimmune fluctuations that distort efficacy measurements.
The lawsuit contends that Nektar's enrollment process failed to enforce these standards, resulting in the randomization of four patients who should never have entered the trial.

AllegedEnrollment Failures by the Numbers

• Two patients had unstable alopecia areata, having been diagnosed less than six months before randomization, violating the protocol's disease stability requirement
• Two additional patients began treatment before completing the mandatory eight-week washout period for prior alopecia areata medications
• The trial's primary endpoint narrowly missed statistical significance with the ineligible patients included (p=0.186 and p=0.121 for the two dosing arms)
• Both rezpegaldesleukin treatment arms reached statistical significance when the four ineligible patients were excluded from the analysis
• Only 94 patients were randomized in total, meaning four protocol violations represented over 4% of the entire study population
• Management repeatedly assured investors across multiple quarters that enrollment followed applicable instructions and protocol standards
Calculate your potential recoveryor call ☎(212) 363-7500.

The Operational Compliance Gap the Lawsuit Identifies

Asallegedin the filing, the gap between what Nektar represented about its enrollment procedures and what actually occurred at its approximately 30 global trial sites is central to this action. The complaint asserts that management touted "unique operational features" designed to minimize clinical operational risk while ineligible patients were being randomized into the Company's most important study. As set forth in the complaint, the Company's repeated claims of drug development expertise and protocol adherence were materially misleading given the enrollment failures that ultimately compromised the trial's primary endpoint.
"The complaint raises serious questions about whether investors received accurate information about the integrity of Nektar's clinical enrollment process. When a company repeatedly certifies that trial protocols are being followed while ineligible patients are being enrolled, shareholders deserve to know."-- Joseph E. Levi, Esq.
Join the Nektar recovery actionor contact Joseph E. Levi, Esq. at ☎(212) 363-7500.
Levi & Korsinsky, LLP -- Top 50 securities litigation firm (ISS, seven consecutive years). Over 70 professionals. Hundreds of millions recovered.
CONTACT:Levi & Korsinsky, LLPJoseph E. Levi, Esq.Ed Korsinsky, Esq.33 Whitehall Street, 27th FloorNew York, NY 10004[email protected]Tel: (212) 363-7500Fax: (212) 363-7171

Frequently Asked Questions

What is the Nektar Therapeutics lawsuit about?

The lawsuit alleges that Nektar failed to comply with patient enrollment standards in its REZOLVE-AA trial.

How did Nektar's stock react to the enrollment issues?

Nektar's stock fell by 7.77% after the company disclosed the inclusion of ineligible patients.

What were the specific enrollment violations in the trial?

Four patients were enrolled despite not meeting disease stability and washout period requirements.

What is the deadline for investors to join the lawsuit?

Investors have until May 5, 2026, to seek lead plaintiff status in the class action.

Last updated: Apr 15, 2026