StandardAero is trading at $27.57, up 20.97% after-hours, with no company-specific announcement identified for September 22. - StandardAero closed September 22, 2026, at $22.79. - Its investor-relations page lists September 3 as its latest news and August 6 as its latest earnings release. - The Nasdaq Composite gained 0.62%, but that moderate move does not clearly explain StandardAero’s unusually large after-hours surge.