#1 Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 3, 2021. Includes 404 accrued dividend equivalent units.

#1 The price reported in Column 4 is a weighted average price. These were sold in multiple transactions at prices ranging from $75.00 to $75.09, inclusive. The reporting person undertakes to provide to Southern Company, any security holder of Southern Company, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4.

#1 The price reported in Column 4 is a weighted average price. These were sold in multiple transactions at prices ranging from $75.00 to $75.09, inclusive. The reporting person undertakes to provide to Southern Company, any security holder of Southern Company, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4.

#1 Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on February 13, 2022. Includes 242 accrued dividend equivalent units.

#2 Shares withheld to satisfy required state and federal tax withholding requirements.