ImmunityBio Faces Class Action Lawsuit and FDA Warning
Written by Emily J. Thompson, Senior Investment Analyst
Updated: 58 minutes ago
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Should l Buy IBRX?
Source: Globenewswire
- Class Action Filed: Pomerantz LLP has initiated a class action lawsuit against ImmunityBio, alleging securities fraud by the company and certain executives, with investors needing to apply by May 26, 2026, to become Lead Plaintiff to protect their interests.
- FDA Warning Released: On March 24, 2026, the FDA publicly disclosed a warning letter asserting that ImmunityBio continues to promote its bladder cancer drug Anktiva in a misleading manner, despite previous warnings, indicating serious compliance issues.
- Stock Price Plummets: Following the FDA warning, ImmunityBio's stock price fell by $1.99, or 21.12%, closing at $7.41 per share on March 24, 2026, reflecting market concerns over the company's compliance and future outlook.
- Legal Firm's Reputation: Pomerantz LLP is recognized as a leading firm in class action litigation, specializing in securities and antitrust cases, with a long history of recovering multimillion-dollar damages for victims, underscoring its significant influence in the legal landscape.
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Analyst Views on IBRX
Wall Street analysts forecast IBRX stock price to rise
3 Analyst Rating
3 Buy
0 Hold
0 Sell
Strong Buy
Current: 7.290
Low
5.00
Averages
7.33
High
9.00
Current: 7.290
Low
5.00
Averages
7.33
High
9.00
About IBRX
Immunitybio, Inc. is a vertically integrated, clinical-stage biotechnology company developing therapies and vaccines that bolster the natural immune system to defeat cancers and infectious diseases. Using its applied science and platforms to treat cancers, including the development of potential cancer vaccines, as well as developing immunotherapies and cell therapies to reduce or eliminate the need for standard high-dose chemotherapy. Its platforms and their associated product candidates are designed to attack cancer and infectious pathogens by activating both the innate immune system, including NK cells, dendritic cells, and macrophages, as well as the adaptive immune system comprising B and T cells, in an orchestrated manner. Its platforms for the development of biologic product candidates include antibody-cytokine fusion proteins, vaccine vectors, and cell therapies. Its biologic commercial product candidate, Anktiva, is an IL-15 superagonist antibody-cytokine fusion protein.
About the author

Emily J. Thompson
Emily J. Thompson, a Chartered Financial Analyst (CFA) with 12 years in investment research, graduated with honors from the Wharton School. Specializing in industrial and technology stocks, she provides in-depth analysis for Intellectia’s earnings and market brief reports.
- Class Action Filed: Pomerantz LLP has initiated a class action lawsuit against ImmunityBio, alleging securities fraud by the company and certain executives, with investors needing to apply by May 26, 2026, to become Lead Plaintiff to protect their interests.
- FDA Warning Released: On March 24, 2026, the FDA publicly disclosed a warning letter asserting that ImmunityBio continues to promote its bladder cancer drug Anktiva in a misleading manner, despite previous warnings, indicating serious compliance issues.
- Stock Price Plummets: Following the FDA warning, ImmunityBio's stock price fell by $1.99, or 21.12%, closing at $7.41 per share on March 24, 2026, reflecting market concerns over the company's compliance and future outlook.
- Legal Firm's Reputation: Pomerantz LLP is recognized as a leading firm in class action litigation, specializing in securities and antitrust cases, with a long history of recovering multimillion-dollar damages for victims, underscoring its significant influence in the legal landscape.
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- Lawsuit Background: ImmunityBio is facing a securities class action lawsuit due to misleading statements made by its Chief Scientific Officer regarding the efficacy of Anktiva, involving investors who purchased shares between January 19 and March 24, 2026.
- FDA Warning Letter: The FDA issued a warning letter to ImmunityBio, stating that its promotional materials, including a podcast and TV ad, contained false claims about Anktiva's ability to treat all cancers, which lack supporting data and pose significant public health concerns.
- Stock Price Plunge: Following the news, ImmunityBio's stock price dropped over 21% on March 24, 2026, erasing nearly $2 billion in market capitalization, indicating strong market apprehension regarding the company's future prospects.
- Investor Rights Protection: Hagens Berman is investigating whether ImmunityBio intentionally misled investors and is urging those who suffered significant losses to submit claims, highlighting a strong focus on corporate compliance and accountability.
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- Stock Price Plunge: Following an FDA Warning Letter revealing misleading promotional communications about ImmunityBio's lead drug, IBRX shares fell by 21% to $7.42 on March 24, 2026, resulting in significant losses for investors and indicating a sharp decline in market trust for the company.
- Executive Accountability: The lawsuit alleges that Dr. Patrick Soon-Shiong, the Executive Chairman and Global Chief Scientific Officer, was directly involved in the management of false promotions, implicating him in the company's internal controls and information dissemination, which could lead to increased legal risks for the firm.
- Legal Framework: Under Section 20(a) of the Securities Exchange Act of 1934, Soon-Shiong is accused of being a control person responsible for the dissemination of false information due to his senior position, potentially impacting the company's future operations and reputation.
- Investor Rights: The court has set May 26, 2026, as the deadline for applying for lead plaintiff status, allowing investors to represent the entire class, highlighting the potential financial implications for the company and the collective action capabilities of its investors.
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- Lawsuit Announcement: Kessler Topaz Meltzer & Check, LLP has filed a securities fraud class action lawsuit against ImmunityBio (IBRX) on behalf of investors who purchased shares between January 19 and March 24, 2026, highlighting significant investor concerns regarding the company's financial transparency.
- FDA Warning Impact: On March 24, 2026, ImmunityBio received a warning letter from the FDA due to misleading claims made by its Executive Chairman about Anktiva, resulting in a 21.12% drop in stock price, which raises investor apprehensions about the company's future prospects.
- False Statement Allegations: The lawsuit alleges that ImmunityBio made materially false statements regarding its business and operations, particularly concerning Anktiva's cancer vaccine claims, potentially leading to investor losses and intensifying scrutiny over the company's governance.
- Investor Action Recommendations: Affected investors are advised to apply for lead plaintiff status by May 26, 2026, to protect their rights in the litigation, reflecting a strong emphasis on legal recourse and expectations for improved corporate governance.
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- Class Action Filed: Bronstein, Gewirtz & Grossman, LLC has announced a class action lawsuit against ImmunityBio, seeking damages for investors who purchased securities between January 19, 2026, and March 24, 2026, reflecting strong investor concern over potential fraudulent activities by the company.
- Allegations of False Statements: The complaint alleges that ImmunityBio's executive Soon-Shion materially overstated Anktiva's capabilities, leading to materially false and misleading statements regarding the company's business, operations, and prospects, which could result in long-term reputational damage for the firm.
- Investor Rights Protection: Investors are encouraged to apply to be lead plaintiffs by May 26, 2026, indicating a commitment from the legal team to protect investor rights, which may also impact the company's future stock performance.
- Legal Fee Arrangement: Bronstein, Gewirtz & Grossman, LLC states they will represent investors on a contingency fee basis, meaning they will only charge fees if they successfully recover losses, thereby reducing financial risk for investors and enhancing their willingness to participate in the lawsuit.
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- Lawsuit Background: ImmunityBio, Inc. is facing a class action lawsuit for securities fraud, alleging material misstatements and omissions regarding its lead biologic product, Anktiva, during the period from January 19 to March 24, 2026, which has significantly impacted investor confidence.
- Stock Price Plunge: Following an FDA warning on March 24, 2026, regarding false claims about Anktiva, ImmunityBio's stock price fell by $1.98, or 21.12%, closing at $7.42 per share, reflecting strong market concerns about the company's future prospects.
- Investor Action: Investors are encouraged to file for lead plaintiff status by May 26, 2026, to represent other investors in the lawsuit, with Kessler Topaz Meltzer & Check, LLP offering free case evaluations, highlighting the importance of investor protection.
- Law Firm Background: Kessler Topaz Meltzer & Check, LLP is a leading law firm specializing in securities fraud class actions, having recovered over $25 billion for clients and the classes they represent, demonstrating its significant strength and influence in the securities litigation field.
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