SHAREHOLDER ALERT: Levi & Korsinsky, LLP Notifies Investors It Has Filed a Complaint to Recover Losses Suffered by Purchasers of Mereo BioPharma Group plc American Depositary Shares and Sets a Lead Plaintiff Deadline of April 6, 2026

NEW YORK, Feb. 04, 2026 (GLOBE NEWSWIRE) -- The following statement is being issued by Levi & Korsinsky, LLP:

To: All persons or entities who purchased or otherwise acquired American Depositary Shares (“ADS”) of Mereo BioPharma Group plc (“Mereo” or the “Company”) (NASDAQ: MREO) between June 5, 2023, and December 26, 2025, inclusive. You are hereby notified that the class action lawsuit Megan Dodge v. Mereo BioPharma Group plc, et al. (Case No. 1:26-cv-00988) has been commenced in the United States District Court for the Southern District of New York. To get more information go to:

https://zlk.com/pslra-1/mereo-biopharma-group-plc-lawsuit-submission-form-2

or contact Joseph E. Levi, Esq. either via email at jlevi@levikorsinsky.com or by telephone at (212) 363-7500. There is no cost or obligation to you.

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%.

“Our firm is committed to ensuring that investors receive full compensation for losses caused by corporate misrepresentations,” said Joseph E. Levi, a partner at Levi & Korsinsky. “We encourage MREO shareholders to step forward before the April 6, 2026 deadline so we can pursue justice on their behalf.”

If you suffered a loss in MREO ADS, you have until April 6, 2026 to request that the Court appoint you as lead plaintiff. Your ability to share in any recovery doesn’t require that you serve as a lead plaintiff.

WHY LEVI & KORSINSKY: Over the past 20 years, the team at Levi & Korsinsky has secured hundreds of millions of dollars for aggrieved shareholders and built a track record of winning high-stakes cases. Our firm has extensive expertise representing investors in complex securities litigation and a team of over 70 employees to serve our clients. For seven years in a row, Levi & Korsinsky has ranked in ISS Securities Class Action Services’ Top 50 Report as one of the top securities litigation firms in the United States.

CONTACT:
Levi & Korsinsky, LLP  
Joseph E. Levi, Esq. 
Ed Korsinsky, Esq. 
33 Whitehall Street, 27th Floor 
New York, NY 10004 
jlevi@levikorsinsky.com 
Tel: (212) 363-7500 
Fax: (212) 363-7171 
www.zlk.com