NRG −38.5%. American Electric Power +8.2%, Nextera Energy −5.6%, Southern −6.8%, Constellation Energy −29.8%. Weekly closes, Oct 17, 2025 = 100, log scale.

End-of-day closes (Databento EOD), the last close of each week. The four peers are the largest US-listed companies by market value in NRG’s SEC industry (Electric Services) with a year of closes. It shows what the closes did; a move here is not a cause, a forecast or a call.