Kyverna Therapeutics is trading 7.5% higher at $7.60 after-hours, with no confirmed explanation for the rebound. - It closed at $7.07 on September 23, 2026; regular-session trading declined amid broad market weakness. - No company-specific announcement, earnings release, or regulatory catalyst was identified for the session. The latest investor-relations updates were dated September 2 and earlier; the after-hours rebound appears disconnected from the broader tape and lacks a confirmed explanation.