SO

SEC source: 0001209191-18-022940 · doc4.xml · derivative · entry 1

HUDSON LINDA P · CIK 0001222196 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,543.0605

Underlying: Southern Company Common Stock · 783.6991 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: 0001209191-18-022934 · doc4.xml · derivative · entry 1

HAGEN VERONICA M · CIK 0001281028 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,160.6769

Underlying: Southern Company Common Stock · 1,511.4196 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: 0001209191-18-022925 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,527.1876

Underlying: Southern Company Common Stock · 123.4449 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: 0001209191-18-022929 · doc4.xml · derivative · entry 1

GRAIN DAVID J · CIK 0001249303 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,192.3259

Underlying: Southern Company Common Stock · 1,511.4196 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: 0001209191-18-022917 · doc4.xml · derivative · entry 1

Clark Henry A III · CIK 0001474932 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,362.5538

Underlying: Southern Company Common Stock · 783.6991 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: 0001209191-18-022914 · doc4.xml · derivative · entry 1

BOSCIA JON A · CIK 0001157628 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,639.7364

Underlying: Southern Company Common Stock · 783.6991 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: 0001209191-18-022909 · doc4.xml · derivative · entry 1

BARANCO JUANITA P · CIK 0001198001 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 97,104.5451

Underlying: Southern Company Common Stock · 1,399.4626 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: 0001209191-18-023397 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,184

F1 · balance_after: Reflects 9,403 shares withheld to satisfy state and federal tax requirements for the final 40% portion of an April 1, 2013 RSU award that vested on April 1, 2018 (17,116 RSUs and 4,083 accrued dividend equivalent units).

SEC source: 0001209191-18-020937 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,403.7427

Underlying: Southern Company Common Stock · 123.5007 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: 0001209191-18-019137 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,056.8762

Underlying: Southern Company Common Stock · 4,270.1154 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. Crosswhite's employment with The Southern Company. Mr. Crosswhite 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. Crosswhite's employment with The Southern Company. Mr. Crosswhite may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-019136 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 79,563.9915

Underlying: Southern Company Common Stock · 6,486.2831 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. Bowers' employment with The Southern Company. Mr. Bowers 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. Bowers' employment with The Southern Company. Mr. Bowers may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-017269 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,280.242

Underlying: Southern Company Common Stock · 123.4727 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: 0001209191-18-014875 · doc4.xml · derivative · entry 1

Daiss Ann P · CIK 0001354912 · Comptroller

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,689

Underlying: Southern Company Common Stock · 2,655 shares

Expires not disclosed

F1 · shares: Restricted Stock Units are payable in Southern Company common stock and vest one-third per year on the first, second, and third anniversary of grant date. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F1 · price: Restricted Stock Units are payable in Southern Company common stock and vest one-third per year on the first, second, and third anniversary of grant date. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F1 · derivative.exercise_date: Restricted Stock Units are payable in Southern Company common stock and vest one-third per year on the first, second, and third anniversary of grant date. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F1 · derivative.expiration_date: Restricted Stock Units are payable in Southern Company common stock and vest one-third per year on the first, second, and third anniversary of grant date. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-18-011217 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,156.7693

Underlying: Southern Company Common Stock · 124.2317 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: 0001209191-18-010060 · doc4.xml · derivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,355

Underlying: Southern Company Common Stock · 677 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.

F1 · security: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 677 RSUs and 30 dividend equivalent units vested.

F1 · price: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 677 RSUs and 30 dividend equivalent units vested.

F1 · derivative.exercise_date: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 677 RSUs and 30 dividend equivalent units vested.

F1 · derivative.expiration_date: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 677 RSUs and 30 dividend equivalent units vested.

SEC source: 0001209191-18-010060 · doc4.xml · nonDerivative · entry 2

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,536.1266

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

SEC source: 0001209191-18-010060 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,859.1266

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: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 677 RSUs and 30 dividend equivalent units vested.

SEC source: 0001209191-18-010050 · doc4.xml · derivative · entry 3

Lantrip Mark · CIK 0001600639 · President & CEO, SCS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,355

Underlying: Southern Company Common Stock · 677 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.

F1 · security: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 677 RSUs and 30 dividend equivalent units vested.

F1 · price: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 677 RSUs and 30 dividend equivalent units vested.

F1 · derivative.exercise_date: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 677 RSUs and 30 dividend equivalent units vested.

F1 · derivative.expiration_date: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 677 RSUs and 30 dividend equivalent units vested.

SEC source: 0001209191-18-010050 · doc4.xml · nonDerivative · entry 2

Lantrip Mark · CIK 0001600639 · President & CEO, SCS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,380.026

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

SEC source: 0001209191-18-010050 · doc4.xml · nonDerivative · entry 1

Lantrip Mark · CIK 0001600639 · President & CEO, SCS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,596.026

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: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 677 RSUs and 30 dividend equivalent units vested.

SEC source: 0001209191-18-010044 · doc4.xml · derivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,355

Underlying: Southern Company Common Stock · 677 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.

F1 · security: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 677 RSUs and 30 dividend equivalent units vested.

F1 · price: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 677 RSUs and 30 dividend equivalent units vested.

F1 · derivative.exercise_date: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 677 RSUs and 30 dividend equivalent units vested.

F1 · derivative.expiration_date: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 677 RSUs and 30 dividend equivalent units vested.

SEC source: 0001209191-18-010044 · 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: 20,782

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

SEC source: 0001209191-18-010044 · 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: 21,105

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: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 677 RSUs and 30 dividend equivalent units vested.

SEC source: 0001209191-18-010018 · doc4.xml · derivative · entry 5

Daiss Ann P · CIK 0001354912 · Comptroller

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,034

Underlying: Southern Company Common Stock · 517 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 · price: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 517 RSUs and 23 dividend equivalent units vested.

F3 · derivative.exercise_date: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 517 RSUs and 23 dividend equivalent units vested.

F3 · derivative.expiration_date: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 517 RSUs and 23 dividend equivalent units vested.

SEC source: 0001209191-18-010018 · doc4.xml · nonDerivative · entry 4

Daiss Ann P · CIK 0001354912 · Comptroller

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,615

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

SEC source: 0001209191-18-010018 · doc4.xml · nonDerivative · entry 3

Daiss Ann P · CIK 0001354912 · Comptroller

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,780

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: Restricted Stock Unit (RSU) award was granted on February 13, 2017. On February 13, 2018, 517 RSUs and 23 dividend equivalent units vested.

SEC source: 0001209191-18-010058 · doc4.xml · derivative · entry 5

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,444

Underlying: Southern Company Common Stock · 2,222 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: 0001209191-18-010058 · doc4.xml · nonDerivative · entry 4

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,152.1266

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

SEC source: 0001209191-18-010058 · doc4.xml · nonDerivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,610.1266

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: 0001209191-18-010058 · doc4.xml · nonDerivative · entry 2

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,727.1266

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

SEC source: 0001209191-18-010058 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,488.1266

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 101 accrued dividend equivalent units.

SEC source: 0001209191-18-010056 · doc4.xml · derivative · entry 5

Wilson Anthony L · CIK 0001538652 · President, Mississippi Power

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,208

Underlying: Southern Company Common Stock · 1,604 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: 0001209191-18-010056 · doc4.xml · nonDerivative · entry 4

Wilson Anthony L · CIK 0001538652 · President, Mississippi Power

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,677

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

SEC source: 0001209191-18-010056 · doc4.xml · nonDerivative · entry 3

Wilson Anthony L · CIK 0001538652 · President, Mississippi Power

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,545

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: 0001209191-18-010056 · doc4.xml · nonDerivative · entry 2

Wilson Anthony L · CIK 0001538652 · President, Mississippi Power

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,140

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

SEC source: 0001209191-18-010056 · doc4.xml · nonDerivative · entry 1

Wilson Anthony L · CIK 0001538652 · President, Mississippi Power

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,722

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.

SEC source: 0001209191-18-010052 · doc4.xml · derivative · entry 3

Sykes Nancy E · CIK 0001691094 · EVP & CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,651

Underlying: Southern Company Common Stock · 1,326 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: 0001209191-18-010052 · doc4.xml · nonDerivative · entry 2

Sykes Nancy E · CIK 0001691094 · EVP & CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,863

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

SEC source: 0001209191-18-010052 · doc4.xml · nonDerivative · entry 1

Sykes Nancy E · CIK 0001691094 · EVP & CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,358

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 60 accrued dividend equivalent units.

SEC source: 0001209191-18-010048 · doc4.xml · derivative · entry 5

Lantrip Mark · CIK 0001600639 · President & CEO, SCS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,510

Underlying: Southern Company Common Stock · 2,256 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: 0001209191-18-010048 · doc4.xml · nonDerivative · entry 4

Lantrip Mark · CIK 0001600639 · President & CEO, SCS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,889.026

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

SEC source: 0001209191-18-010048 · doc4.xml · nonDerivative · entry 3

Lantrip Mark · CIK 0001600639 · President & CEO, SCS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,327.026

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: 0001209191-18-010048 · doc4.xml · nonDerivative · entry 2

Lantrip Mark · CIK 0001600639 · President & CEO, SCS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,694.026

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

SEC source: 0001209191-18-010048 · doc4.xml · nonDerivative · entry 1

Lantrip Mark · CIK 0001600639 · President & CEO, SCS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,470.026

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 103 accrued dividend equivalent units.

SEC source: 0001209191-18-010047 · doc4.xml · derivative · entry 5

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,108

Underlying: Southern Company Common Stock · 3,055 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: 0001209191-18-010047 · doc4.xml · nonDerivative · entry 4

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,907.1563

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

SEC source: 0001209191-18-010047 · doc4.xml · nonDerivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 72,972.1563

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: 0001209191-18-010047 · doc4.xml · nonDerivative · entry 2

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 40,030.1563

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

SEC source: 0001209191-18-010047 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,035.1563

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.

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 139 accrued dividend equivalent units.

SEC source: 0001209191-18-010014 · doc4.xml · derivative · entry 5

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,660

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.

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.