GOSS Investor Alert: Gossamer Bio Securities Fraud Lawsuit - Investors With Losses May Seek to Lead the Class Action After Company Allegedly Overstated Trial Prospects: Levi & Korsinsky Accessibility Statement Skip NavigationPromise vs. Reality: The Gossamer Bio PROSERA Performance GapNEW YORK, May 13, 2026 /PRNewswire/ -- "We firmly believe that we have accomplished this patient selection goal." That was the promise. The reality: a Phase 3 trial that failed its primary endpoint, and shareholders who lost o ...