SeaStar Medical is trading 6% down at $2.68 on October 23, 2026; healthcare weakness is a possible backdrop, but no direct cause is established. - Healthcare stocks are down 1.29%; a cyberattack disclosure at Quest Diagnostics has contributed to uncertainty across healthcare. - On October 22, SeaStar Medical reported positive pediatric QUELIMMUNE registry findings: 90-day survival was 65.1%, versus 47.4% in the comparison group. This news does not explain the current decline.