X0306 4 2020-02-11 0 0000092122 SOUTHERN CO SO 0001338158 Evans Andrew W 30 IVAN ALLEN JR. BLVD., NW ATLANTA GA 30308 0 1 0 0 Executive Vice President & CFO Southern Company Common Stock 2020-02-11 4 M 0 29279 0.00 A 121065 D Southern Company Common Stock 2020-02-11 4 F 0 13392 68.59 D 107673 D Southern Company Common Stock 2020-02-11 4 A 0 52503 0.00 A 160176 D Southern Company Common Stock 2020-02-11 4 F 0 23812 68.59 D 136364 D Southern Company Common Stock 2020-02-11 4 M 0 4853 0.00 A 141217 D Southern Company Common Stock 2020-02-11 4 F 0 2202 68.59 D 139015 D Southern Co. Performance Stock Units Holding 0.00 2020-02-11 4 M 0 25114 0.00 D Southern Company Common Stock 25114 0 D Performance Restricted Stock Units 0.00 2020-02-11 4 M 0 4647 0.00 D Southern Company Common Stock 4647 9293 D Shares acquired upon vesting of final portion of performance stock units (PSU) granted on September 29, 2016. Each PSU represents the right to receive, at settlement, one share of Southern Company common stock. Includes 4,165 accrued dividend equivalent units. Shares withheld to satisfy required state and federal tax withholding requirements. Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2017-2019 award. The Compensation and Management Succession Committee certified performance on February 11, 2020. Includes accrued dividend equivalent units. Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 11, 2019. The Compensation Committee and Management Succession Committee certified performance on February 11, 2020. Includes 206 accrued dividend equivalent units. Represents final portion of PSU award granted on September 29, 2016. A portion of the award vested on July 1, 2017, July 1, 2018 and July 1, 2019. The final portion of the award vested based upon achievement of performance goals for the period from January 1, 2017 through December 31, 2019. Represents performance restricted stock units granted on February 11, 2019. The Compensation and Management Succession Committee certified performance on February 11, 2020 and the first 1/3 vested. The remaining award will vest 1/3 in 2021 and 1/3 in 2022. Each performance restricted stock unit represents the right to receive, at statement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements. /s/Marcia R. DeMar, Attorney-in-Fact for Andrew W. Evans 2020-02-13