X0306 4 2019-02-11 0 0000092122 SOUTHERN CO SO 0001524757 Kuczynski Stephen E 30 IVAN ALLEN JR. BLVD., NW ATLANTA GA 30308 0 1 0 0 Pres. & CEO, Southern Nuclear Southern Company Common Stock 2019-02-11 4 M 0 3712 0.00 A 69292.1563 D Southern Company Common Stock 2019-02-11 4 F 0 1686 49.24 D 67606.1563 D Southern Company Common Stock 2019-02-11 4 A 0 28052 0.00 A 95658.1563 D Southern Company Common Stock 2019-02-11 4 F 0 12723 49.24 D 82935.1563 D Performance Restricted Stock Units 0.00 2019-02-11 4 M 0 3567 0.00 D Southern Company Common Stock 3567 7136 D Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 27, 2018. The Compensation and Management Succession Committee certified performance on February 11, 2019. Includes 145 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 2016-2018 award. The Compensation and Management Succession Committee certified performance on February 11, 2019. Includes accrued dividend equivalent units. Represents performance restricted stock units granted on February 27, 2018. The Compensation and Management Succession Committee certified performance on February 11, 2019 and the first 1/3 vested. The remaining award will vest 1/3 in 2020 and 1/3 in 2021. Each performance restricted stock unit represents the right to receive, at settlement, 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 Stephen E. Kuczynski 2019-02-13