X0306 4 2020-02-11 0 0000092122 SOUTHERN CO SO 0001354912 Daiss Ann P 30 IVAN ALLEN JR. BLVD., NW ATLANTA GA 30308 0 1 0 0 Comptroller Southern Company Common Stock 2020-02-11 4 A 0 5567 0.00 A 16606.38 D Southern Company Common Stock 2020-02-11 4 F 0 2532 68.59 D 14074.38 D Southern Company Common Stock 2020-02-11 4 M 0 840 0.00 A 14914.38 D Southern Company Common Stock 2020-02-11 4 F 0 427 68.59 D 14487.38 D Southern Company Common Stock 7212.6174 I 401K Southern Co Restricted Stock Units 0.00 2020-02-11 4 M 0 804 0.00 D Southern Company Common Stock 804 1606 D Southern Co Restricted Stock Units 0.00 2020-02-11 4 A 0 1787 0.00 A Southern Company Common Stock 1787 3574 D 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 withheld to satisfy required state and federal tax withholding requirements. Shares acquired upon vesting of first 1/3 of restricted stock units granted on February 11, 2019. Includes 36 accrued dividend equivalent units. Represents restricted stock units granted on February 11, 2019. The remaining award will vest 1/3 in 2021 and 1/3 in 2022. Each 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. Restricted stock units are payable in Southern Company common stock and vest one-third per year on the first, second and third anniversary of grant date. 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 Ann P. Daiss 2020-02-13