
Introduction to the Replimune Class Action Lawsuit
The financial disaster unfolded when Replimune received a Complete Response Letter from the FDA about their Biologics License Application (BLA) for RP1 on July 22, 2025. The FDA stated that “the IGNYTE trial is not considered to be an adequate and well-controlled clinical investigation that provides substantial evidence of effectiveness”.
The Replimune Class Action Lawsuit now aims to represent all investors who bought securities between November 22, 2024, and July 21, 2025. The devastating announcement sent Replimune’s stock crashing down by more than 77%, as detailed in the Replimune Lawsuit.
Please see the various investor resources below for an additional wealth of information.
Investors File Replimune Lawsuit After FDA Rejects Replimune’s RP1 Application
Law firms rushed to launch investigations into Replimune Group, Inc. at the time of the FDA rejection. Furious investors then filed a securities fraud class action lawsuit in the United States District Court for the District of Massachusetts.
The Replimune Class Action Lawsuit claims Replimune and several executives broke federal securities laws under the Securities Exchange Act of 1934. Shareholders believe the company misled them about their lead product candidate RP1’s potential success.
“We allege Replimune executives knew or recklessly disregarded that the IGNYTE clinical trial design was inadequate to support FDA approval,” the Replimune Class Action Lawsuit alleges.
The legal action targets statements made between November 22, 2024, and July 21, 2025. Executives repeatedly assured investors about RP1’s future success during this period, despite knowing about serious trial design issues.
The Replimune Lawsuit aims to help investors recover their losses, especially when you have several pension funds that lost millions after the stock collapsed. These funds have shown interest in becoming lead plaintiffs before the September deadline.

Replimune Stock Plummets 75% Following FDA Announcement
Replimune Group’s stock crashed on July 22, 2025, right after the FDA sent them a Complete Response Letter. The news crushed the biopharmaceutical company’s stock price by USD 9.52 per share. This 77% drop left the shares at just USD 2.80.
The market reacted quick to this news. Trading volume exploded to 10 million shares, dwarfing the usual daily average of 1.63 million. The stock’s freefall below USD 3.00 forced stock exchanges to pause trading several times that day.
This crash hit even harder because Replimune’s stock had jumped 32% in the previous two weeks. Investors had expected good news from the FDA. Instead, they watched the stock price crash from USD 12.09 to USD 2.92.
Wall Street analysts were quick to react to this devastating news. Cantor Fitzgerald cut Replimune’s rating from Overweight to Neutral. Analyst Driscoll also dropped the stock to neutral and reduced his price target to USD 4. But some firms managed to keep their faith – Barclays stuck with its Overweight rating and USD 17.00 target. BMO Capital also backed an Outperform rating with a USD 27.00 price target.
Replimune Class Action Lawsuit Alleges Securities Fraud by Company Executives
Law firms have filed a class action lawsuit titled Jboor v. Replimune Group, Inc. against the company in the U.S. District Court for the District of Massachusetts. The lawsuit charges Replimune and its top executives with violations of the Securities Exchange Act of 1934.
Investors who purchased Replimune securities between November 22, 2024, and July 21, 2025, are represented in this legal action. The core allegation states that Replimune “recklessly overstated” the IGNYTE trial’s prospects while knowing about significant issues that would trigger FDA rejection.
The Replimune Class Action Lawsuit reveal that executives made “materially false and misleading statements” about Replimune’s business operations and future prospects. The company allegedly knew that the IGNYTE trial lacked proper controls, population uniformity, and statistical power needed for regulatory approval.
Lead plaintiff Usama Jboor filed the case on July 24, 2025. The substantial stock price collapse could result in significant damages. This litigation might mirror other biotech fraud cases, such as a similar 2023 settlement that reached $350 million.
Shareholders who experienced substantial losses can serve as lead plaintiff in the Replimune Class Action Lawsuit. Attorney Timothy L. Miles of the Law Offices of Timothy L. Miles offers free consultations through phone at 855/846-6529 or email at [email protected].
The court’s deadline for lead plaintiff appointment requests is September 22, 2025.

Conclusion
The Replimune lawsuit stands as one of the most important biotech investment disasters of 2025. The FDA’s rejection of the RP1 application left investors watching their portfolios crumble as shares dropped 77% in just one trading day.
Law firms moved fast to file securities fraud allegations against the company and its executives. These legal complaints target misleading statements about the IGNYTE trial’s viability from November 22, 2024, to July 21, 2025.
Wall Street’s response showed how serious this situation was. Major analysts downgraded the stock and cut price targets right after the announcement. Notwithstanding that, some firms managed to keep optimistic outlooks even as the stock fell below $3 per share. Investors who lost money should know about the September 22, 2025 deadline to join as lead plaintiffs in this class action lawsuit.
Anyone who had big losses can serve as lead plaintiff or learn about their shareholder rights. Attorney Timothy L. Miles of the Law Offices of Timothy L. Miles offers free consultations at 855/846-6529 or via e-mail at [email protected].
This case explains without doubt the big risks biotech investors face when companies allegedly misstate clinical trial data or regulatory prospects. The lawsuit claims Replimune’s executives knew about basic flaws in their trial design but kept making positive public statements. These claims will face deep scrutiny as the case moves forward.
Pension funds and institutional investors want to lead the legal action. This suggests the case might bring substantial financial compensation if plaintiffs win. Retail investors who saw their portfolios destroyed must think about their legal options before the filing deadline arrives.
Key Takeaways
Investors who purchased Replimune securities face a critical legal opportunity following the company’s devastating 77% stock collapse after FDA rejection.
• FDA rejection triggers massive lawsuit: Replimune faces securities fraud allegations after FDA deemed their IGNYTE trial “inadequate and not well-controlled” for RP1 approval.
• Stock crashes 77% in single day: Shares plummeted from $12.09 to $2.80 on July 22, 2025, wiping out billions in investor value.
• September 22 deadline approaching: Affected investors have until September 22, 2025, to join the class action as lead plaintiffs in the securities fraud case.
• Executives allegedly misled investors: The Lawsuit claims company executives knew about trial design flaws but made positive public statements between November 2024 and July 2025.
• Multiple law firms mobilize: Several prominent firms filed class action suits alleging violations of federal securities laws, with potential for substantial damages similar to other biotech fraud settlements.
This case serves as a stark reminder of biotech investment risks when companies allegedly misrepresent clinical trial data. Investors who suffered losses should contact qualified attorneys immediately to explore their legal options before the critical September deadline passes.
Frequently Asked Questions about Replimune Lawsuit
Q1. What triggered the Replimune class action lawsuit? The Replimune Class Action Lawsuit was triggered by the FDA’s rejection of Replimune’s RP1 application, citing inadequacies in the IGNYTE trial design. This led to a 77% drop in the company’s stock price in a single day.
Q2. Who is eligible to participate in the Replimune lawsuit? Investors who purchased Replimune securities between November 22, 2024, and July 21, 2025, are eligible to participate in the class action lawsuit.
Q3. What are the main allegations in the Replimune lawsuit? The lawsuit alleges that Replimune and its executives made false and misleading statements about the viability of RP1 and the IGNYTE trial, violating federal securities laws.
Q4. How much did Replimune’s stock value decline following the FDA announcement? Replimune’s stock plummeted by more than 75%, falling from $12.09 to $2.80 per share on July 22, 2025, following the FDA’s announcement.
Q5. What is the deadline for investors to join the Replimune class action lawsuit as lead plaintiffs? Investors have until September 22, 2025, to ask the court to be appointed as lead plaintiffs in the Replimune class action lawsuit.
