144 0001642170 XXXXXXXX LIVE 0000092122 Southern Company 001-03526 30 Ivan Allen Jr. Boulevard, NW Atlanta GA 30308 404-506-5000 Christopher Cummiskey Officer Common Merrill Lynch

3455 Peachtree Road NE, Suite 1000 Atlanta GA 30326

6669 643891.95 1119391291 03/19/2026 NYSE Common 02/11/2026 PERFORMANCE STOCK UNIT VEST SOUTHERN COMPANY N 4000 02/11/2026 COMPENSATORY PAYMENT Common 02/11/2026 RESTRICTED STOCK UNIT VEST SOUTHERN COMPANY N 21 02/11/2026 COMPENSATORY PAYMENT Common 02/11/2026 RESTRICTED STOCK UNIT VEST SOUTHERN COMPANY N 731 02/11/2026 COMPENSATORY PAYMENT Common 02/01/2026 RESTRICTED STOCK UNIT VEST SOUTHERN COMPANY N 98 02/01/2026 COMPENSATORY PAYMENT Common 02/01/2026 RESTRICTED STOCK UNIT VEST SOUTHERN COMPANY N 783 02/01/2026 COMPENSATORY PAYMENT Common 01/31/2026 RESTRICTED STOCK UNIT VEST SOUTHERN COMPANY N 967 01/31/2026 COMPENSATORY PAYMENT Common 01/31/2026 RESTRICTED STOCK UNIT VEST SOUTHERN COMPANY N 69 01/31/2026 COMPENSATORY PAYMENT Y 03/19/2026 11/18/2025 Christopher Cummiskey