🟢 Gossamer Bio is trading 6.2% up in after-hours trading, with no clear company-specific catalyst identified

Gossamer Bio is trading $11.31, up 6.20%, with no clear company-specific announcement explaining the rise.

• Regular-session close: $10.65; the provided price context underlies the quoted prices and percentage.
• The latest news listed in the company’s investor-relations materials was its September 23 seralutinib FDA filing announcement, which predates this move.
• Broader sentiment was positive on October 5, with the S&P 500 up 0.69%; this may provide context but does not establish the cause.