SeaStar Medical is trading 5.6% up at $3.76 on September 30, 2026, with no clear company-specific catalyst identified. - The broader market is higher, with the S&P 500 up 0.60% and Nasdaq up 0.90%; healthcare is reportedly down 1.33%. - The company announced September 29 that its chief medical officer will present at an October pediatric therapy symposium. This upcoming event is not evidence of a direct cause for the share gain.