SO is trading 4.5% lower at $88.69 in after-hours trading, with no clear company-specific catalyst identified. - SO closed at $92.90 on October 23, 2026. - Market context was mixed: the S&P 500 and Dow were down, while the Nasdaq was up. - Southern Company’s October 20 bylaw changes and quarterly dividend announcement predate the decline; third-quarter earnings are scheduled for November 5. Available evidence does not establish a direct link between those earlier items and the decline.