Portnoy Law Firm probes possible securities fraud at Gossamer Bio after 80.14% stock plunge

Reuters03-18

Portnoy Law Firm probes possible securities fraud at Gossamer Bio after 80.14% stock plunge

The Portnoy Law Firm said it has opened an investigation into possible securities fraud involving Gossamer and may file a class action on behalf of investors. Gossamer shares fell $1.71 to $0.42 on February 23, 2026, a drop of 80.14%. The decline followed the company’s announcement that its Phase 3 PROSERA trial of seralutinib in pulmonary arterial hypertension did not meet its primary endpoint.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Gossamer Bio Inc. published the original content used to generate this news brief via GlobeNewswire (Ref. ID: 202603180900PRIMZONEFULLFEED9673866) on March 18, 2026, and is solely responsible for the information contained therein.

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