X0306 4/A 2018-02-12 2018-02-14 0 0000092122 SOUTHERN CO SO 0001538652 Wilson Anthony L 30 IVAN ALLEN JR. BLVD., NW ATLANTA GA 30308 0 1 0 0 Pres & CEO, Mississippi Power Southern Company Common Stock 2018-02-12 4 M 0 1677 0.00 A 13013 D Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes 73 accrued dividend equivalent units. Amendment filed to correct the shares of common stock beneficially owned on February 12, 2018. The 1,677 shares of common stock acquired were inadvertently deducted from rather than added to the total number beneficially owned. /s/ Marcia R. DeMar, Attorney-in-Fact for Anthony L. Wilson 2019-02-06