SO

SEC source: 0001209191-18-010014 · doc4.xml · nonDerivative · entry 4

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,013

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

SEC source: 0001209191-18-010014 · doc4.xml · nonDerivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,237

F3 · security: Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2015-2017 award. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes accrued dividend equivalent units.

SEC source: 0001209191-18-010014 · doc4.xml · nonDerivative · entry 2

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,876

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

SEC source: 0001209191-18-010014 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,238

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 first 1/3 of performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes 198 accrued dividend equivalent units.

SEC source: 0001209191-18-010039 · doc4.xml · derivative · entry 5

Kerr, II James Y · CIK 0001601624 · Executive VP & General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,942

Underlying: Southern Company Common Stock · 2,972 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 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · price: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · derivative.exercise_date: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · derivative.expiration_date: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

SEC source: 0001209191-18-010039 · doc4.xml · nonDerivative · entry 4

Kerr, II James Y · CIK 0001601624 · Executive VP & General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,398

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

SEC source: 0001209191-18-010039 · doc4.xml · nonDerivative · entry 3

Kerr, II James Y · CIK 0001601624 · Executive VP & General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,453

F3 · security: Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2015-2017 award. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes accrued dividend equivalent units.

SEC source: 0001209191-18-010039 · doc4.xml · nonDerivative · entry 2

Kerr, II James Y · CIK 0001601624 · Executive VP & General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,113

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

SEC source: 0001209191-18-010039 · doc4.xml · nonDerivative · entry 1

Kerr, II James Y · CIK 0001601624 · Executive VP & General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,107

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 first 1/3 of performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes 135 accrued dividend equivalent units.

SEC source: 0001209191-18-010028 · doc4.xml · derivative · entry 3

Evans Andrew W · CIK 0001338158 · Pres & CEO, Southern Co. Gas

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,752

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 performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F3 · price: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F3 · derivative.exercise_date: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F3 · derivative.expiration_date: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

SEC source: 0001209191-18-010028 · doc4.xml · nonDerivative · entry 2

Evans Andrew W · CIK 0001338158 · Pres & CEO, Southern Co. Gas

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,471

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

SEC source: 0001209191-18-010028 · doc4.xml · nonDerivative · entry 1

Evans Andrew W · CIK 0001338158 · Pres & CEO, Southern Co. Gas

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 44,051

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 first 1/3 of performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes 222 accrued dividend equivalent units.

SEC source: 0001209191-18-010012 · doc4.xml · derivative · entry 5

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,660

Underlying: Southern Company Common Stock · 4,831 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 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · price: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · derivative.exercise_date: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · derivative.expiration_date: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

SEC source: 0001209191-18-010012 · doc4.xml · nonDerivative · entry 4

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 86,101

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

SEC source: 0001209191-18-010012 · doc4.xml · nonDerivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 106,750

F3 · security: Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2015-2017 award. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes accrued dividend equivalent units.

SEC source: 0001209191-18-010012 · doc4.xml · nonDerivative · entry 2

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 55,488

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

SEC source: 0001209191-18-010012 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 57,040

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 first 1/3 of performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes 220 accrued dividend equivalent units.

SEC source: 0001209191-18-010035 · doc4.xml · derivative · entry 5

Greene Kimberly S, · CIK 0001573512 · EVP & COO, Southern Co.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,462

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.

F4 · security: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · price: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · derivative.exercise_date: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · derivative.expiration_date: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

SEC source: 0001209191-18-010035 · doc4.xml · nonDerivative · entry 4

Greene Kimberly S, · CIK 0001573512 · EVP & COO, Southern Co.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,587.3653

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

SEC source: 0001209191-18-010035 · doc4.xml · nonDerivative · entry 3

Greene Kimberly S, · CIK 0001573512 · EVP & COO, Southern Co.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,425.3653

F3 · security: Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2015-2017 award. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes accrued dividend equivalent units.

SEC source: 0001209191-18-010035 · doc4.xml · nonDerivative · entry 2

Greene Kimberly S, · CIK 0001573512 · EVP & COO, Southern Co.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,074.3653

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

SEC source: 0001209191-18-010035 · doc4.xml · nonDerivative · entry 1

Greene Kimberly S, · CIK 0001573512 · EVP & COO, Southern Co.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,109.3653

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 first 1/3 of performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes 147 accrued dividend equivalent units.

SEC source: 0001209191-18-010013 · doc4.xml · derivative · entry 5

Connally Stan W · CIK 0001498337 · President & CEO, Gulf Power Co

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,555

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.

F4 · security: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · price: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · derivative.exercise_date: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · derivative.expiration_date: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

SEC source: 0001209191-18-010013 · doc4.xml · nonDerivative · entry 4

Connally Stan W · CIK 0001498337 · President & CEO, Gulf Power Co

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,121

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

SEC source: 0001209191-18-010013 · doc4.xml · nonDerivative · entry 3

Connally Stan W · CIK 0001498337 · President & CEO, Gulf Power Co

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,801

F3 · security: Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2015-2017 award. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes accrued dividend equivalent units.

SEC source: 0001209191-18-010013 · doc4.xml · nonDerivative · entry 2

Connally Stan W · CIK 0001498337 · President & CEO, Gulf Power Co

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,650

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

SEC source: 0001209191-18-010013 · doc4.xml · nonDerivative · entry 1

Connally Stan W · CIK 0001498337 · President & CEO, Gulf Power Co

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,183

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 first 1/3 of performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes 81 accrued dividend equivalent units.

SEC source: 0001209191-18-010018 · doc4.xml · nonDerivative · entry 2

Daiss Ann P · CIK 0001354912 · Comptroller

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,240

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

SEC source: 0001209191-18-010018 · doc4.xml · nonDerivative · entry 1

Daiss Ann P · CIK 0001354912 · Comptroller

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,040

F1 · security: Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2015-2017 award. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes accrued dividend equivalent units.

SEC source: 0001209191-18-010032 · doc4.xml · derivative · entry 5

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,656

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.

F4 · security: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · price: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · derivative.exercise_date: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · derivative.expiration_date: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

SEC source: 0001209191-18-010032 · doc4.xml · nonDerivative · entry 4

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 139,828.4085

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

SEC source: 0001209191-18-010032 · doc4.xml · nonDerivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 145,479.4085

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 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes 815 accrued dividend equivalent units.

SEC source: 0001209191-18-010032 · doc4.xml · nonDerivative · entry 2

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 126,836.4085

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

SEC source: 0001209191-18-010032 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 184,365.4085

F1 · security: Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2015-2017 award. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes accrued dividend equivalent units.

SEC source: 0001209191-18-010008 · doc4.xml · derivative · entry 5

BEATTIE ART P · CIK 0001187458 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,492

Underlying: Southern Company Common Stock · 4,247 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 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · price: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · derivative.exercise_date: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

F4 · derivative.expiration_date: Represents performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018 and the first 1/3 vested. The remaining award will vest 1/3 in 2019 and 1/3 in 2020. 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.

SEC source: 0001209191-18-010008 · doc4.xml · nonDerivative · entry 4

BEATTIE ART P · CIK 0001187458 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,382

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

SEC source: 0001209191-18-010008 · doc4.xml · nonDerivative · entry 3

BEATTIE ART P · CIK 0001187458 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 59,675

F3 · security: Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2015-2017 award. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes accrued dividend equivalent units.

SEC source: 0001209191-18-010008 · doc4.xml · nonDerivative · entry 2

BEATTIE ART P · CIK 0001187458 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,612

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

SEC source: 0001209191-18-010008 · doc4.xml · nonDerivative · entry 1

BEATTIE ART P · CIK 0001187458 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,994

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 first 1/3 of performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes 194 accrued dividend equivalent units.

SEC source: 0001209191-19-007827 · doc4a.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,013

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 first 1/3 of performance restricted stock units granted on February 13, 2017. The Compensation and Management Succession Committee certified performance on February 12, 2018. Includes 73 accrued dividend equivalent units.

F2 · balance_after: Amendment filed to correct the shares of common stock beneficially owned on February 12, 2018. The 1,677 shares of common stock acquired were inadvertently deducted from rather than added to the total number beneficially owned.

SEC source: 0001209191-18-007602 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,032.5376

Underlying: Southern Company Common Stock · 123.5566 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-004786 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,908.981

Underlying: Southern Company Common Stock · 122.806 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-002979 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,713.6796

Underlying: Southern Company Common Stock · 116.663 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-001170 · doc4.xml · derivative · entry 1

WOOD E JENNER III · CIK 0001015221 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,531.2616

Underlying: Southern Company Common Stock · 727.802 shares

Expires not disclosed

F1 · derivative.exercise_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F1 · derivative.expiration_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

SEC source: 0001209191-18-001169 · doc4.xml · derivative · entry 1

Thompson Larry D. · CIK 0001267205 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,629.9021

Underlying: Southern Company Common Stock · 1,455.6041 shares

Expires not disclosed

F1 · derivative.exercise_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F1 · derivative.expiration_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

SEC source: 0001209191-18-001167 · doc4.xml · derivative · entry 1

Specker Steven R. · CIK 0001503916 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,152.7181

Underlying: Southern Company Common Stock · 727.802 shares

Expires not disclosed

F1 · derivative.exercise_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F1 · derivative.expiration_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

SEC source: 0001209191-18-001166 · doc4.xml · derivative · entry 1

SMITH WILLIAM G JR · CIK 0000909019 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 81,374.93

Underlying: Southern Company Common Stock · 1,299.6465 shares

Expires not disclosed

F1 · derivative.exercise_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F1 · derivative.expiration_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

SEC source: 0001209191-18-001164 · doc4.xml · derivative · entry 1

Klein Dale E. · CIK 0001493467 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,001.7822

Underlying: Southern Company Common Stock · 727.802 shares

Expires not disclosed

F1 · derivative.exercise_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F1 · derivative.expiration_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

SEC source: 0001209191-18-001161 · doc4.xml · derivative · entry 1

JAMES DONALD M · CIK 0001188417 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 125,129.5646

Underlying: Southern Company Common Stock · 727.802 shares

Expires not disclosed

F1 · derivative.exercise_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F1 · derivative.expiration_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

SEC source: 0001209191-18-001163 · doc4.xml · derivative · entry 1

JOHNS JOHN D · CIK 0001189571 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,499.4298

Underlying: Southern Company Common Stock · 1,403.6182 shares

Expires not disclosed

F1 · derivative.exercise_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F1 · derivative.expiration_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.