Gossamer Bio is trading 9.23% up at $11.72 as U.S. markets open higher.

  • The S&P 500 is up 0.65%.
  • The Nasdaq Composite is up 0.85%.
  • No company-specific announcement directly explains the September 21, 2026 move. H.C. Wainwright maintained a Buy rating and raised its target from $2 to $90 after recalibrating for the recent 1-for-80 reverse split, but did not explicitly link the action to today’s price movement.