144 0002082705 XXXXXXXX LIVE 0000092122 Southern Company 001-03526 30 Ivan Allen Jr. Boulevard, N.W. Atlanta GA 30308 404-506-5000 Matthew Kim Officer Common Merrill Lynch 3455 Peachtree Road NE Ste 1000 Atlanta GA 30326 100 9657 1127301098 05/01/2026 NYSE Common 02/07/2024 Performance Stock Unit Vest Southern Co. N 100 02/07/2024 Compensatory Payment N Matthew Kim 30 Ivan Allen Jr. Boulevard, N.W. Atlanta GA 30308 Common 02/24/2026 5123 487453.45 05/01/2026 11/25/2025 Matthew M. Kim