NRG Energy is trading 25.6% up at $120.17 in after-hours trading after closing September 30, 2026, at $95.67, with no confirmed catalyst. - Searches found no matching company announcement or late-breaking news explaining the move. - The latest listed quarterly results and analyst actions predate the move; broad market performance was mixed and does not explain a jump of this size. - Treat the move as unexplained pending confirmation or further reporting.