WOMACK CHRISTOPHER C

SEC source: 0001193125-26-239215 · ownership.xml · derivative · entry 4

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Southern Company Common Stock · 6,898 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: Represents the final 1/3 of performance restricted stock units granted on May 24, 2023.

F3 · derivative.exercise_date: Represents the final 1/3 of performance restricted stock units granted on May 24, 2023.

F3 · derivative.expiration_date: Represents the final 1/3 of performance restricted stock units granted on May 24, 2023.

F3 · derivative.underlying_shares: Represents the final 1/3 of performance restricted stock units granted on May 24, 2023.

SEC source: 0001193125-26-239215 · ownership.xml · nonDerivative · entry 2

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 213,449.2496

F2 · shares: Shares withheld to satisfy required state and federal tax withholding requirements.

SEC source: 0001193125-26-239215 · ownership.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 216,863.2496

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Shares acquired upon vesting of the final 1/3 of performance restricted stock units granted on May 24, 2023. Includes 764 accrued dividend equivalent units.

SEC source: 0001195423-26-000002 · wk-form4_1779227011.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,917

SEC source: 0001193125-26-054369 · ownership.xml · derivative · entry 8

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,604

Underlying: Southern Company Common Stock · 13,302 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · shares: Represents first 1/3 of performance restricted stock units granted on February 5, 2025. The remaining award will vest 1/3 in 2027 and 1/3 in 2028. Each 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.

F5 · derivative.exercise_date: Represents first 1/3 of performance restricted stock units granted on February 5, 2025. The remaining award will vest 1/3 in 2027 and 1/3 in 2028. Each 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.

F5 · derivative.expiration_date: Represents first 1/3 of performance restricted stock units granted on February 5, 2025. The remaining award will vest 1/3 in 2027 and 1/3 in 2028. Each 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.

SEC source: 0001193125-26-054369 · ownership.xml · nonDerivative · entry 6

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 209,197.8806

F2 · shares: Shares withheld to satisfy required state and federal tax withholding requirements.

SEC source: 0001193125-26-054369 · ownership.xml · nonDerivative · entry 5

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 261,456.8806

F4 · shares: Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2023-2025 award granted on May 24, 2023. The Compensation and Talent Development Committee certified performance on February 11, 2026 and the Board of Directors ratified such certification on February 16, 2026. Includes accrued dividend equivalent units.

SEC source: 0001193125-26-054369 · ownership.xml · nonDerivative · entry 4

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 144,129.8806

F2 · shares: Shares withheld to satisfy required state and federal tax withholding requirements.

SEC source: 0001193125-26-054369 · ownership.xml · nonDerivative · entry 3

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 150,901.8806

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 5, 2025. The Compensation and Talent Development Committee certified performance on February 11, 2026 and the Board of Directors ratified such certification on February 16, 2026. Includes 449 accrued dividend equivalent units.

SEC source: 0001193125-26-054369 · ownership.xml · nonDerivative · entry 2

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 137,150.8806

F2 · shares: Shares withheld to satisfy required state and federal tax withholding requirements.

SEC source: 0001193125-26-054369 · ownership.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 164,865.8806

F1 · shares: Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2023-2025 award granted on February 1, 2023 . The Compensation and Talent Development Committee certified performance on February 11, 2026 and the Board of Directors ratified such certification on February 16, 2026. Includes accrued dividend equivalent units.

SEC source: 0001193125-26-036032 · ownership.xml · derivative · entry 6

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Southern Company Common Stock · 4,313 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · shares: Represents final 1/3 of performance restricted stock units granted on February 1, 2023. Each 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.

F4 · derivative.exercise_date: Represents final 1/3 of performance restricted stock units granted on February 1, 2023. Each 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.

F4 · derivative.expiration_date: Represents final 1/3 of performance restricted stock units granted on February 1, 2023. Each 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.

SEC source: 0001193125-26-036032 · ownership.xml · nonDerivative · entry 4

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 102,642.8806

F2 · shares: Shares withheld to satisfy required state and federal tax withholding requirements.

SEC source: 0001193125-26-036032 · ownership.xml · nonDerivative · entry 3

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 104,808.8806

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 1, 2023. Includes 499 accrued dividend equivalent units.

SEC source: 0001193125-26-036032 · ownership.xml · derivative · entry 7

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,216

Underlying: Southern Company Common Stock · 13,215 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · shares: Represents second 1/3 of performance restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. Each 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.

F5 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. Each 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.

F5 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. Each 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.

SEC source: 0001193125-26-036032 · ownership.xml · nonDerivative · entry 2

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 99,996.8806

F2 · shares: Shares withheld to satisfy required state and federal tax withholding requirements.

SEC source: 0001193125-26-036032 · ownership.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 105,971.8806

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on January 31, 2024. Includes 944 accrued dividend equivalent units.

SEC source: 0000950170-25-077872 · ownership.xml · derivative · entry 4

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,898

Underlying: Southern Company Common Stock · 6,898 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: Represents second 1/3 of performance restricted stock units granted on May 24, 2023. The remaining award will vest in 2026. Each 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.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on May 24, 2023. The remaining award will vest in 2026. Each 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.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on May 24, 2023. The remaining award will vest in 2026. Each 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.

SEC source: 0000950170-25-077872 · ownership.xml · nonDerivative · entry 2

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 91,801.9746

F2 · shares: Shares withheld to satisfy required state and federal tax withholding requirements.

SEC source: 0000950170-25-077872 · ownership.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 95,086.9746

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on May 24, 2023. Includes 457 accrued dividend equivalent units.

SEC source: 0001628280-25-026484 · wk-form4_1747683411.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,805

SEC source: 0000950170-25-031369 · ownership.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 87,720.7006

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $90 to $90.35, inclusive. The reporting person undertakes to provide to Southern Company, any security holder of Southern Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4.

SEC source: 0000950170-25-027817 · ownership.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 112,127.7006

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $90 to $90.01, inclusive. The reporting person undertakes to provide to Southern Company, any security holder of Southern Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4.

SEC source: 0000950170-25-022182 · ownership.xml · derivative · entry 4

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Southern Company Common Stock · 3,726 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: Represents final 1/3 of performance restricted stock units granted on February 13, 2022. Each 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.

F3 · derivative.exercise_date: Represents final 1/3 of performance restricted stock units granted on February 13, 2022. Each 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.

F3 · derivative.expiration_date: Represents final 1/3 of performance restricted stock units granted on February 13, 2022. Each 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.

F3 · derivative.underlying_shares: Represents final 1/3 of performance restricted stock units granted on February 13, 2022. Each 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.

SEC source: 0000950170-25-022182 · ownership.xml · nonDerivative · entry 2

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 113,720.7006

F2 · shares: Shares withheld to satisfy required state and federal tax withholding requirements.

SEC source: 0000950170-25-022182 · ownership.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 115,584.7006

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 13, 2022. Includes 448 accrued dividend equivalent units.

SEC source: 0000950170-25-018170 · ownership.xml · derivative · entry 6

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,431

Underlying: Southern Company Common Stock · 13,216 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · shares: Represents first 1/3 of performance restricted stock units granted on January 31, 2024. The remaining award will vest 1/3 in 2026 and 1/3 in 2027. Each 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.

F4 · derivative.exercise_date: Represents first 1/3 of performance restricted stock units granted on January 31, 2024. The remaining award will vest 1/3 in 2026 and 1/3 in 2027. Each 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.

F4 · derivative.expiration_date: Represents first 1/3 of performance restricted stock units granted on January 31, 2024. The remaining award will vest 1/3 in 2026 and 1/3 in 2027. Each 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.

SEC source: 0000950170-25-018170 · ownership.xml · nonDerivative · entry 4

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 111,410.7006

F2 · shares: Shares withheld to satisfy required state and federal tax withholding requirements calculated as of the date of the performance certification.

SEC source: 0000950170-25-018170 · ownership.xml · nonDerivative · entry 3

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 133,993.7006

F3 · shares: Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2022-2024 award. The Compensation and Talent Development Committee certified performance on February 5, 2025 and the Board of Directors ratified such certification on February 11, 2025. Includes accrued dividend equivalent units.

SEC source: 0000950170-25-018170 · ownership.xml · nonDerivative · entry 2

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,406.7006

F2 · shares: Shares withheld to satisfy required state and federal tax withholding requirements calculated as of the date of the performance certification.

SEC source: 0000950170-25-018170 · ownership.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 90,152.7006

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on January 31, 2024. The Compensation and Talent Development Committee certified performance on February 5, 2025 and the Board of Directors ratified such certification on February 11, 2025. Includes 483 accrued dividend equivalent units.

SEC source: 0000950170-25-013203 · ownership.xml · derivative · entry 4

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,313

Underlying: Southern Company Common Stock · 4,313 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest in 2026. Each 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.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest in 2026. Each 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.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest in 2026. Each 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.

SEC source: 0000950170-25-013203 · ownership.xml · nonDerivative · entry 2

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,453.7006

F2 · shares: Shares withheld to satisfy required state and federal tax withholding requirements.

SEC source: 0000950170-25-013203 · ownership.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 78,566.7006

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on February 1, 2023. Includes 343 accrued dividend equivalent units.

SEC source: 0000950170-24-134059 · ownership.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 73,910.7006

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $86.00 to $86.37, inclusive. The reporting person undertakes to provide to Southern Company, any security holder of Southern Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4.

SEC source: 0001628280-24-024038 · wk-form4_1715976507.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,077

SEC source: 0001209191-24-003350 · doc4.xml · derivative · entry 4

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,726

Underlying: Southern Company Common Stock · 3,726 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each 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.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each 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.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each 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.

SEC source: 0001209191-24-003350 · doc4.xml · nonDerivative · entry 2

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 84,000.5176

F2 · shares: Shares withheld to satisfy required state and federal tax withholding requirements.

SEC source: 0001209191-24-003350 · doc4.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,818.5176

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on February 13, 2022. Includes 302 accrued dividend equivalent units.

SEC source: 0001209191-24-003054 · doc4.xml · derivative · entry 5

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,626

Underlying: Southern Company Common Stock · 4,313 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · shares: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each 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.

F4 · derivative.exercise_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each 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.

F4 · derivative.expiration_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each 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.

SEC source: 0001209191-24-003054 · doc4.xml · nonDerivative · entry 4

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,790.5176

F2 · shares: Shares withheld to satisfy required state and federal tax withholding requirements.

SEC source: 0001209191-24-003054 · doc4.xml · nonDerivative · entry 3

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,817.5176

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 1, 2023. The Compensation and Talent Development Committee certified performance on February 7, 2024. Includes 179 accrued dividend equivalent units.

SEC source: 0001209191-24-003054 · doc4.xml · nonDerivative · entry 2

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 79,325.5176

F2 · shares: Shares withheld to satisfy required state and federal tax withholding requirements.

SEC source: 0001209191-24-003054 · doc4.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 105,671.5176

F1 · shares: Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2021-2023 award. The Compensation and Talent Development Committee certified performance on February 7, 2024. Includes accrued dividend equivalent units.

SEC source: 0001209191-24-004855 · doc4.xml · derivative · entry 4

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,796

Underlying: Southern Company Common Stock · 6,898 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: Represents first 1/3 of performance restricted stock units granted on May 24, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each 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.

F3 · derivative.exercise_date: Represents first 1/3 of performance restricted stock units granted on May 24, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each 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.

F3 · derivative.expiration_date: Represents first 1/3 of performance restricted stock units granted on May 24, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each 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.

SEC source: 0001209191-24-004855 · doc4.xml · nonDerivative · entry 2

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,693.5176

F2 · shares: Shares withheld to satisfy required state and federal tax withholding requirements.

SEC source: 0001209191-24-004855 · doc4.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 88,901.5176

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on May 24, 2023. The Compensation and Talent Development Committee certified performance on February 7, 2024. Includes 213 accrued dividend equivalent units.

SEC source: 0001209191-24-002924 · doc4.xml · derivative · entry 4

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Southern Company Common Stock · 3,931 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: Represents final 1/3 of performance restricted stock units granted on February 3, 2021. Each 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.

F3 · derivative.exercise_date: Represents final 1/3 of performance restricted stock units granted on February 3, 2021. Each 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.

F3 · derivative.expiration_date: Represents final 1/3 of performance restricted stock units granted on February 3, 2021. Each 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.

SEC source: 0001209191-24-002924 · doc4.xml · nonDerivative · entry 2

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,256.5176

F2 · shares: Shares withheld to satisfy required state and federal tax withholding requirements.

SEC source: 0001209191-24-002924 · doc4.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · CEO, President and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,289.5176

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 3, 2021. Includes 495 accrued dividend equivalent units.