SO

SEC source: 0001209191-20-010209 · doc4.xml · nonDerivative · entry 2

Wilson Anthony L · CIK 0001538652 · Pres & CEO, Mississippi Power

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 40,843

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

SEC source: 0001209191-20-010209 · doc4.xml · nonDerivative · entry 1

Wilson Anthony L · CIK 0001538652 · Pres & CEO, Mississippi Power

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,662

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 · security: Shares acquired upon vesting of the final 1/3 of performance restricted stock units granted on February 13, 2017. Includes 241 accrued dividend equivalent units.

SEC source: 0001209191-20-010205 · doc4.xml · derivative · entry 3

Greene Kimberly S, · CIK 0001573512 · Chair & CEO, Southern Co. Gas

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Southern Company Common Stock · 3,231 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 · security: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

F3 · derivative.exercise_date: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

F3 · derivative.expiration_date: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

SEC source: 0001209191-20-010205 · doc4.xml · nonDerivative · entry 2

Greene Kimberly S, · CIK 0001573512 · Chair & CEO, Southern Co. Gas

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 78,051

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

SEC source: 0001209191-20-010205 · doc4.xml · nonDerivative · entry 1

Greene Kimberly S, · CIK 0001573512 · Chair & CEO, Southern Co. Gas

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 79,737

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 · security: Shares acquired upon vesting of the final 1/3 of performance restricted stock units granted on February 13, 2017. Includes 484 accrued dividend equivalent units.

SEC source: 0001209191-20-010201 · doc4.xml · derivative · entry 3

Evans Andrew W · CIK 0001338158 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Southern Company Common Stock · 4,876 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 · security: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

F3 · derivative.exercise_date: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

F3 · derivative.expiration_date: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

SEC source: 0001209191-20-010201 · doc4.xml · nonDerivative · entry 2

Evans Andrew W · CIK 0001338158 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 142,077

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

SEC source: 0001209191-20-010201 · doc4.xml · nonDerivative · entry 1

Evans Andrew W · CIK 0001338158 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 144,621

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 · security: Shares acquired upon vesting of the final 1/3 of performance restricted stock units granted on February 13, 2017. Includes 730 accrued dividend equivalent units.

SEC source: 0001209191-20-010198 · doc4.xml · derivative · entry 4

Connally Stan W · CIK 0001498337 · Executive Vice President, SCS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Southern Company Common Stock · 1,778 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 · security: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

F3 · derivative.exercise_date: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

F3 · derivative.expiration_date: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

SEC source: 0001209191-20-010198 · doc4.xml · nonDerivative · entry 2

Connally Stan W · CIK 0001498337 · Executive Vice President, SCS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,713.053

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

SEC source: 0001209191-20-010198 · doc4.xml · nonDerivative · entry 1

Connally Stan W · CIK 0001498337 · Executive Vice President, SCS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,620.053

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 · security: Shares acquired upon vesting of the final 1/3 of performance restricted stock units granted on February 13, 2017. Includes 266 accrued dividend equivalent units.

SEC source: 0001209191-20-010193 · doc4.xml · derivative · entry 4

Crosswhite Mark A. · CIK 0001426400 · President & CEO, APC

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Southern Company Common Stock · 4,330 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 · security: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

F3 · derivative.exercise_date: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

F3 · derivative.expiration_date: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

SEC source: 0001209191-20-010193 · doc4.xml · nonDerivative · entry 2

Crosswhite Mark A. · CIK 0001426400 · President & CEO, APC

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 94,011

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

SEC source: 0001209191-20-010193 · doc4.xml · nonDerivative · entry 1

Crosswhite Mark A. · CIK 0001426400 · President & CEO, APC

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 96,220

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 · security: Shares acquired upon vesting of the final 1/3 of performance restricted stock units granted on February 13, 2017. Includes 648 accrued dividend equivalent units.

SEC source: 0001209191-20-010191 · doc4.xml · derivative · entry 4

BOWERS WILLIAM P · CIK 0001225760 · President & CEO, GPC

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Southern Company Common Stock · 4,830 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 · security: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

F3 · derivative.exercise_date: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

F3 · derivative.expiration_date: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

SEC source: 0001209191-20-010191 · doc4.xml · nonDerivative · entry 2

BOWERS WILLIAM P · CIK 0001225760 · President & CEO, GPC

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 155,092

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

SEC source: 0001209191-20-010191 · doc4.xml · nonDerivative · entry 1

BOWERS WILLIAM P · CIK 0001225760 · President & CEO, GPC

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 157,612

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 · security: Shares acquired upon vesting of the final 1/3 of performance restricted stock units granted on February 13, 2017. Includes 724 accrued dividend equivalent units.

SEC source: 0001209191-20-010184 · doc4.xml · derivative · entry 4

FANNING THOMAS A · CIK 0001227464 · President, CEO & Chairman

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Southern Company Common Stock · 17,828 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 · security: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

F3 · derivative.exercise_date: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

F3 · derivative.expiration_date: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

SEC source: 0001209191-20-010184 · doc4.xml · nonDerivative · entry 2

FANNING THOMAS A · CIK 0001227464 · President, CEO & Chairman

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 606,863.073

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

SEC source: 0001209191-20-010184 · doc4.xml · nonDerivative · entry 1

FANNING THOMAS A · CIK 0001227464 · President, CEO & Chairman

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 616,159.073

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 · security: Shares acquired upon vesting of the final 1/3 of performance restricted stock units granted on February 13, 2017. Includes 2,669 accrued dividend equivalent units.

SEC source: 0001209191-20-018903 · doc4a.xml · derivative · entry 4

Connally Stan W · CIK 0001498337 · Executive Vice President, SCS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Southern Company Common Stock · 1,778 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 · security: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

F3 · derivative.exercise_date: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

F3 · derivative.expiration_date: Represents final 1/3 of performance restricted stock units granted on February 13, 2017. 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.

SEC source: 0001209191-20-018903 · doc4a.xml · nonDerivative · entry 2

Connally Stan W · CIK 0001498337 · Executive Vice President, SCS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,750

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

SEC source: 0001209191-20-018903 · doc4a.xml · nonDerivative · entry 1

Connally Stan W · CIK 0001498337 · Executive Vice President, SCS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,657

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 · security: Shares acquired upon vesting of the final 1/3 of performance restricted stock units granted on February 13, 2017. Includes 266 accrued dividend equivalent units.

SEC source: 0001209191-20-009393 · doc4.xml · derivative · entry 5

Kuczynski Stephen E · CIK 0001524757 · Pres. & CEO, Southern Nuclear

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,414

Underlying: Southern Company Common Stock · 3,208 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 · security: 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.

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

SEC source: 0001209191-20-009393 · doc4.xml · nonDerivative · entry 4

Kuczynski Stephen E · CIK 0001524757 · Pres. & CEO, Southern Nuclear

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 84,360.1563

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

SEC source: 0001209191-20-009393 · doc4.xml · nonDerivative · entry 3

Kuczynski Stephen E · CIK 0001524757 · Pres. & CEO, Southern Nuclear

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 85,884.1563

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 · security: 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 142 accrued dividend equivalent units.

SEC source: 0001209191-20-009393 · doc4.xml · nonDerivative · entry 2

Kuczynski Stephen E · CIK 0001524757 · Pres. & CEO, Southern Nuclear

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 82,534.1563

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

SEC source: 0001209191-20-009393 · doc4.xml · nonDerivative · entry 1

Kuczynski Stephen E · CIK 0001524757 · Pres. & CEO, Southern Nuclear

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 97,449.1563

F1 · security: 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 perform

SEC source: 0001209191-20-009362 · doc4.xml · derivative · entry 6

Kerr, II James Y · CIK 0001601624 · EVP, Chief Legal Officer & CCO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,710

Underlying: Southern Company Common Stock · 3,355 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 · security: 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.

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

SEC source: 0001209191-20-009362 · doc4.xml · nonDerivative · entry 4

Kerr, II James Y · CIK 0001601624 · EVP, Chief Legal Officer & CCO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 62,767

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

SEC source: 0001209191-20-009362 · doc4.xml · nonDerivative · entry 3

Kerr, II James Y · CIK 0001601624 · EVP, Chief Legal Officer & CCO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 64,197

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 · security: 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 149 accrued dividend equivalent units.

SEC source: 0001209191-20-009362 · doc4.xml · nonDerivative · entry 2

Kerr, II James Y · CIK 0001601624 · EVP, Chief Legal Officer & CCO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,693

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

SEC source: 0001209191-20-009362 · doc4.xml · nonDerivative · entry 1

Kerr, II James Y · CIK 0001601624 · EVP, Chief Legal Officer & CCO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 74,650

F1 · security: 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.

SEC source: 0001209191-20-009368 · doc4.xml · derivative · entry 6

WOMACK CHRISTOPHER C · CIK 0001195423 · EVP & Pres. External Affairs

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,758

Underlying: Southern Company Common Stock · 2,380 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 · security: 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.

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

SEC source: 0001209191-20-009368 · doc4.xml · nonDerivative · entry 4

WOMACK CHRISTOPHER C · CIK 0001195423 · EVP & Pres. External Affairs

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,628.2406

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

SEC source: 0001209191-20-009368 · doc4.xml · nonDerivative · entry 3

WOMACK CHRISTOPHER C · CIK 0001195423 · EVP & Pres. External Affairs

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,757.2406

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 · security: 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 106 accrued dividend equivalent units.

SEC source: 0001209191-20-009368 · doc4.xml · nonDerivative · entry 2

WOMACK CHRISTOPHER C · CIK 0001195423 · EVP & Pres. External Affairs

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,271.2406

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

SEC source: 0001209191-20-009368 · doc4.xml · nonDerivative · entry 1

WOMACK CHRISTOPHER C · CIK 0001195423 · EVP & Pres. External Affairs

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,123.2406

F1 · security: 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.

SEC source: 0001209191-20-009359 · doc4.xml · derivative · entry 8

Evans Andrew W · CIK 0001338158 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,293

Underlying: Southern Company Common Stock · 4,647 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.

F6 · security: 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.

F6 · derivative.exercise_date: 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.

F6 · derivative.expiration_date: 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.

SEC source: 0001209191-20-009359 · doc4.xml · derivative · entry 7

Evans Andrew W · CIK 0001338158 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Southern Company Common Stock · 25,114 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 · security: 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.

F5 · derivative.exercise_date: 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.

F5 · derivative.expiration_date: 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.

SEC source: 0001209191-20-009359 · doc4.xml · nonDerivative · entry 6

Evans Andrew W · CIK 0001338158 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 139,015

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

SEC source: 0001209191-20-009359 · doc4.xml · nonDerivative · entry 5

Evans Andrew W · CIK 0001338158 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 141,217

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 · security: 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.

SEC source: 0001209191-20-009359 · doc4.xml · nonDerivative · entry 4

Evans Andrew W · CIK 0001338158 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 136,364

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

SEC source: 0001209191-20-009359 · doc4.xml · nonDerivative · entry 3

Evans Andrew W · CIK 0001338158 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 160,176

F3 · security: 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.

SEC source: 0001209191-20-009359 · doc4.xml · nonDerivative · entry 2

Evans Andrew W · CIK 0001338158 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 107,673

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

SEC source: 0001209191-20-009359 · doc4.xml · nonDerivative · entry 1

Evans Andrew W · CIK 0001338158 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 121,065

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 · security: 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.

SEC source: 0001209191-20-009361 · doc4.xml · derivative · entry 6

Crosswhite Mark A. · CIK 0001426400 · President & CEO, APC

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,272

Underlying: Southern Company Common Stock · 4,637 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 · security: 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.

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

SEC source: 0001209191-20-009361 · doc4.xml · nonDerivative · entry 4

Crosswhite Mark A. · CIK 0001426400 · President & CEO, APC

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 91,242

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

SEC source: 0001209191-20-009361 · doc4.xml · nonDerivative · entry 3

Crosswhite Mark A. · CIK 0001426400 · President & CEO, APC

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 93,390

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 · security: 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.

SEC source: 0001209191-20-009361 · doc4.xml · nonDerivative · entry 2

Crosswhite Mark A. · CIK 0001426400 · President & CEO, APC

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 88,547

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