ImmunityBio Faces Securities Class Action Lawsuit Over Misleading Claims
Written by Emily J. Thompson, Senior Investment Analyst
Updated: Apr 01 2026
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Should l Buy IBRX?
Source: Globenewswire
- FDA Warning Letter: The FDA issued a warning letter to ImmunityBio, highlighting misleading efficacy claims made by Chairman Soon-Shiong regarding Anktiva during a podcast, resulting in a more than 21% drop in share price on March 24, 2026, erasing nearly $2 billion in market capitalization and severely impacting investor confidence.
- Class Action Lawsuit Initiated: Hagens Berman has filed a securities class action lawsuit against ImmunityBio on behalf of investors who purchased securities between January 19 and March 24, 2026, alleging violations of federal securities laws that could lead to significant losses for investors.
- Efficacy Claims Controversy: Soon-Shiong's assertion that Anktiva can treat all cancers has been flagged by the FDA as lacking data support, misleading the public into believing the drug can cure all cancers, further damaging the company's reputation and trustworthiness.
- Investor Rights Protection: Hagens Berman is urging investors who suffered substantial losses to submit claims and encouraging witnesses to provide information to assist in the investigation, demonstrating a commitment to protecting investor rights while reflecting market concerns about the company's future prospects.
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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: 7.250
Low
5.00
Averages
7.33
High
9.00
Current: 7.250
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.
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- Class Action Notification: Rosen Law Firm reminds investors who purchased ImmunityBio securities between January 19 and March 24, 2026, that they must apply to be lead plaintiff by May 26, 2026, to participate in the class action and seek compensation.
- Fee Arrangement: Investors joining the class action will incur no out-of-pocket costs, as the law firm operates on a contingency fee basis, minimizing the financial burden on investors.
- Case Background: The lawsuit alleges that executives of ImmunityBio made false and misleading statements during the class period, resulting in investor losses when the truth was revealed, highlighting significant inaccuracies regarding the company's business and prospects.
- Law Firm's Strength: Rosen Law Firm is renowned for its successful track record in securities class actions, having recovered over $438 million for investors in 2019 alone, demonstrating its expertise and resource advantages in handling such cases.
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- Legal Investigation Initiated: Lowey Dannenberg P.C. is investigating ImmunityBio Inc. for potential violations of federal securities laws, particularly regarding significant misrepresentations about Anktiva's capabilities, which may have resulted in investor losses exceeding $50,000.
- Lawsuit Context: A complaint filed on March 26, 2026, alleges that ImmunityBio and its executives, including Soon-Shion, materially overstated Anktiva's capabilities, leading to materially false and misleading statements about the company's business and prospects throughout the relevant period.
- Investor Rights Protection: Attorney Andrea Farah stated that the investigation focuses on whether the company and its executives provided investors with accurate and complete information, aiming to protect investors' legal rights.
- Law Firm Background: Lowey Dannenberg is a national law firm representing institutional and individual investors who have suffered financial losses due to corporate fraud and malfeasance, boasting significant experience in prosecuting multi-million-dollar lawsuits.
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- Class Action Filed: Bragar Eagel & Squire has initiated a class action lawsuit against ImmunityBio in the Central District of California on behalf of investors who purchased the company's securities between January 19, 2026, and March 24, 2026, alleging false or misleading statements during this period.
- Allegations of Misrepresentation: The lawsuit claims that CEO Patrick Soon-Shiong materially overstated Anktiva's capabilities, resulting in misleading statements about ImmunityBio's business and prospects, which lacked a reasonable basis, causing investors to suffer losses.
- Investor Rights Protection: Affected investors must apply by May 26, 2026, to be appointed as lead plaintiffs in the lawsuit, with Bragar Eagel & Squire offering free consultations to ensure investors are informed of their rights.
- Law Firm Background: Bragar Eagel & Squire is a nationally recognized law firm specializing in securities, derivative, and commercial litigation, with extensive experience in protecting investor rights and a commitment to representing both individual and institutional clients.
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- Class Action Notification: The Schall Law Firm reminds investors of a class action lawsuit against ImmunityBio for violations of §§10(b) and 20(a) of the Securities Exchange Act, concerning securities purchased between January 19 and March 24, 2026, with a deadline to contact the firm by May 26, 2026.
- False Statement Allegations: The complaint alleges that ImmunityBio made false and misleading statements regarding the capabilities of its Anktiva drug, resulting in investor losses when the truth emerged, highlighting significant deficiencies in the company's disclosure practices.
- Legal Consultation Opportunity: The Schall Law Firm offers free legal consultations, encouraging affected shareholders to reach out to discuss their rights, demonstrating the firm's commitment to investor protection.
- Lawsuit Status Explanation: The class action has not yet been certified, meaning investors are not represented by an attorney until certification occurs, underscoring the importance of participating in the lawsuit to safeguard their interests.
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- Lawsuit Background: ImmunityBio is facing a securities class action lawsuit due to misleading efficacy claims made by its Chief Scientific Officer regarding Anktiva, involving investors who purchased securities between January 19 and March 24, 2026, highlighting significant deficiencies in the company's information disclosure practices.
- FDA Warning Letter: On March 24, 2026, the FDA issued a warning letter to ImmunityBio, stating that its advertising and podcast content contained false or misleading information, particularly regarding Anktiva's efficacy claims, resulting in a more than 21% drop in stock price that day, erasing nearly $2 billion in market capitalization.
- Investor Losses: Hagens Berman is investigating whether ImmunityBio intentionally misled investors, urging those who suffered significant losses during this period to submit claims, indicating that the legal risks faced by the company could severely impact its future financing and market trust.
- Public Health Impact: The FDA emphasized that ImmunityBio's promotional materials failed to provide complete information on Anktiva's FDA-approved indications, and its ongoing misleading efficacy claims pose serious public health risks, reflecting a lack of ethical responsibility in the company's marketing practices.
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