Gossamer Bio is trading at $11.72, up 8.57%, as biotech-sector strength and a broader risk-on market rebound support the move.

  • No fresh company-specific announcement clearly explains the September 17 move; recent coverage centers on the September 10 reverse split and earlier seralutinib filing plans.
  • The XBI biotech ETF is up 2.55%.
  • Trading remains volatile following the reverse split and recent sharp price swings.