Mesoblast Limited

Mesoblast develops allogeneic cellular medicines using its proprietary mesenchymal lineage cell therapy platform. Its lead product candidate, RYONCIL (remestemcel-L), is an investigational therapy comprising mesenchymal stem cells derived from bone marrow. In February 2018, the Company announced that remestemcel-L met its primary endpoint in a Phase 3 trial to treat children with steroid refractory acute graft versus host disease (“aGVHD”).

In early 2020, Mesoblast completed its rolling submission of its Biologics License Application (“BLA”) with the FDA to secure marketing authorization to commercialize remestemcel-L for children with steroid refractory aGVHD.

On August 11, 2020, the FDA released briefing materials for its Oncologic Drugs Advisory Committee (“ODAC”) meeting to be held on August 13, 2020. Therein, the FDA stated that Mesoblast provided post hoc analyses of other studies “to further establish the appropriateness of 45% as the null Day-28 ORR” for its primary endpoint. The briefing materials stated that, due to design differences between these historical studies and Mesoblast’s submitted study, “it is unclear that these study results are relevant to the proposed indication.”

On this news, the Company’s share price fell $6.09, or approximately 35%, to close at $11.33 per share on August 11, 2020, on unusually heavy trading volume.

On October 1, 2020, Mesoblast disclosed that it had received a Complete Response Letter (“CRL”) from the FDA regarding its marketing application for remestemcel-L for treatment of SR-aGVHD in pediatric patients. According to the CRL, the FDA recommended that the Company “conduct at least one additional randomized, controlled study in adults and/or children to provide further evidence of the effectiveness of remestemcel-L for SR-aGVHD.” The CRL also “identified a need for further scientific rationale to demonstrate the relationship of potency measurements to the product’s biologic activity.”

On this news, the Company’s stock fell $6.56, or 35%, to close at $12.03 per share on October 2, 2020, on unusually heavy trading volume.

The complaint filed in this class action alleges that throughout the Class Period, Defendants made materially false and/or misleading statements, as well as failed to disclose material adverse facts about the Company’s business, operations, and prospects. Specifically, Defendants failed to disclose to investors: (1) that comparative analyses between Mesoblast’s Phase 3 trial and three historical studies did not support the effectiveness of remestemcel-L for steroid refractory aGVHD due to design differences between the four studies; (2) that, as a result, the FDA was reasonably likely to require further clinical studies; (3) that, as a result, the commercialization of remestemcel-L in the U.S. was likely to be delayed; and (4) that, as a result of the foregoing, Defendants’ positive statements about the Company’s business, operations, and prospects were materially misleading and/or lacked a reasonable basis.