X0306 4 2021-10-22 0 0000092122 SOUTHERN CO SO 0001881495 Tucker Daniel S 30 IVAN ALLEN JR BLVD NW ATLANTA GA 30308 0 1 0 0 Executive Vice President & CFO Phantom Stock Units 0.00 2021-10-22 4 A 0 3.252 62.95 A Southern Company Common Stock 3.252 3877.6509 D Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date. Shares of phantom stock are payable in cash following termination of Mr. Tucker's employment with The Southern Company. Mr. Tucker may transfer his phantom stock account into an alternative investment account at any time. /s/ Marcia R. DeMar, Attorney-in-Fact for Daniel S. Tucker 2021-10-25