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Mereo BioPharma Group plc Sued for Securities Law Violations – Investors Should Contact The Gross Law Firm for More Information – MREO

Key Takeaway: Mereo BioPharma Group plc is facing a class action lawsuit due to allegations that it misled investors about the efficacy of its Phase 3 ORBIT and COSMIC clinical trials. The complaint states that the company provided overly positive statements while concealing negative facts regarding trial outcomes, both of which failed to meet statistical significance. Following this revelation, Mereo's stock price experienced a steep decline, falling more than 87.7%. The Gross Law Firm is encouraging affected shareholders to register for potential recovery.

Market Sentiment Analysis

CONCERNS & RISKS

  • Mereo BioPharma's stock price plummeted by over 87.7% after disappointing Phase 3 study results.
  • The company faces a class action lawsuit for allegedly misleading investors.
  • Neither the ORBIT nor COSMIC Phase 3 trials achieved their primary endpoints, raising concerns about the company's drug efficacy.
  • The lawsuit suggests a breach of trust with shareholders due to materially false statements.

Full Press Release Details

NEW YORK, Feb. 18, 2026 (GLOBE NEWSWIRE) -- The Gross Law Firm issues the following notice to shareholders of Mereo BioPharma Group plc (NASDAQ: MREO).
Shareholders who purchased shares of MREO during the class period listed are encouraged to contact the firm regarding possible lead plaintiff appointment. Appointment as lead plaintiff is not required to partake in any recovery.
CLASS PERIOD: June 5, 2023 to December 26, 2025
ALLEGATIONS: According to the complaint, defendants provided overwhelmingly positive statements to investors while, at the same time, disseminating materially false and misleading statements and/or concealing material adverse facts concerning the true state of the Phase 3 ORBIT and COSMIC programs; neither of which hit its primary endpoints of reducing annualized clinical fracture rate compared to the placebo or bisphosphonate control groups, respectively. On December 29, 2025, Mereo issued a press release announcing that neither the ORBIT nor the COSMIC Phase 3 studies achieved statistical significance. The press release indicated that neither study met its primary endpoint of reduction in annualized clinical fracture rate compared to placebo or bisphosphonates, respectively, despite improved bone mineral density. Following this news, the price of Mereo’s ADS declined dramatically. From a closing market price of $2.31 per share on December 26, 2025, Mereo’s ADS price fell to $0.29 per share on December 29, 2025, a decline of more than 87.7%.
DEADLINE: April 6, 2026 Shareholders should not delay in registering for this class action. Register your information here: https://securitiesclasslaw.com/securities/mereo-biopharma-group-plc-loss-submission-form-5/?id=183591&from=3
NEXT STEPS FOR SHAREHOLDERS: Once you register as a shareholder who purchased shares of MREO during the timeframe listed above, you will be enrolled in a portfolio monitoring software to provide you with status updates throughout the lifecycle of the case. The deadline to seek to be a lead plaintiff is April 6, 2026. There is no cost or obligation to you to participate in this case.
WHY GROSS LAW FIRM? The Gross Law Firm is a nationally recognized class action law firm, and our mission is to protect the rights of all investors who have suffered as a result of deceit, fraud, and illegal business practices. The Gross Law Firm is committed to ensuring that companies adhere to responsible business practices and engage in good corporate citizenship. The firm seeks recovery on behalf of investors who incurred losses when false and/or misleading statements or the omission of material information by a company lead to artificial inflation of the company's stock. Attorney advertising. Prior results do not guarantee similar outcomes.
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Frequently Asked Questions

What is the class period for Mereo BioPharma Group shareholders?

The class period for Mereo BioPharma Group shareholders is June 5, 2023, to December 26, 2025.

What allegations are made against Mereo BioPharma Group?

Defendants allegedly made misleading statements while concealing material facts regarding the Phase 3 ORBIT and COSMIC programs.

What happened to Mereo's stock price after the December 2025 announcement?

Mereo's ADS price fell from $2.31 to $0.29, a decline of over 87.7%, following the announcement.

Is there a deadline for shareholders to register for the class action?

Yes, the deadline to register for the class action is April 6, 2026.

Are there costs to participate in this class action?

There is no cost or obligation for shareholders to participate in the class action.

Last updated: Feb 18, 2026