SO

SEC source: 0001209191-24-005255 · doc4.xml · derivative · entry 1

WOOD E JENNER III · CIK 0001015221 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,188.6383

Underlying: Southern Company Common Stock · 597.7496 shares

Expires not disclosed

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

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: 0001209191-24-005254 · doc4.xml · derivative · entry 1

Thomas Lizanne · CIK 0001305419 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,014.2746

Underlying: Southern Company Common Stock · 597.7496 shares

Expires not disclosed

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

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: 0001209191-24-005253 · doc4.xml · derivative · entry 1

Svinicki Kristine L · CIK 0001889194 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,577.3434

Underlying: Southern Company Common Stock · 597.7496 shares

Expires not disclosed

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

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: 0001209191-24-005251 · doc4.xml · derivative · entry 1

Moniz Ernest J · CIK 0001265177 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,948.1733

Underlying: Southern Company Common Stock · 597.7496 shares

Expires not disclosed

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

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: 0001209191-24-005252 · doc4.xml · derivative · entry 1

SMITH WILLIAM G JR · CIK 0000909019 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 143,552.6997

Underlying: Southern Company Common Stock · 1,107.5949 shares

Expires not disclosed

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

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: 0001209191-24-005250 · doc4.xml · derivative · entry 1

MEADOR DAVID E · CIK 0001167313 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,014.2746

Underlying: Southern Company Common Stock · 597.7496 shares

Expires not disclosed

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

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: 0001209191-24-005249 · doc4.xml · derivative · entry 1

Klein Dale E. · CIK 0001493467 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,922.6889

Underlying: Southern Company Common Stock · 597.7496 shares

Expires not disclosed

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

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: 0001209191-24-005248 · doc4.xml · derivative · entry 1

JOHNS JOHN D · CIK 0001189571 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,428.9062

Underlying: Southern Company Common Stock · 597.7496 shares

Expires not disclosed

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

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: 0001209191-24-005246 · doc4.xml · derivative · entry 1

GRAIN DAVID J · CIK 0001249303 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,000.0177

Underlying: Southern Company Common Stock · 1,142.7567 shares

Expires not disclosed

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

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: 0001209191-24-005247 · doc4.xml · derivative · entry 1

JAMES DONALD M · CIK 0001188417 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 186,487.266

Underlying: Southern Company Common Stock · 597.7496 shares

Expires not disclosed

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

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: 0001209191-24-005245 · doc4.xml · derivative · entry 1

EARLEY ANTHONY F JR · CIK 0001167316 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,414.806

Underlying: Southern Company Common Stock · 966.948 shares

Expires not disclosed

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

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: 0001209191-24-005244 · doc4.xml · derivative · entry 1

Cooper Shantella E. · CIK 0001698291 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,080.0506

Underlying: Southern Company Common Stock · 1,019.6906 shares

Expires not disclosed

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

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: 0001209191-24-005241 · doc4.xml · derivative · entry 1

Clark Henry A III · CIK 0001474932 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,356.934

Underlying: Southern Company Common Stock · 1,019.6906 shares

Expires not disclosed

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

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: 0001209191-24-005240 · doc4.xml · derivative · entry 1

Akella Janaki · CIK 0001763595 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,469.6594

Underlying: Southern Company Common Stock · 597.7496 shares

Expires not disclosed

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

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: 0001209191-24-004770 · doc4.xml · nonDerivative · entry 1

Kuczynski Stephen E · CIK 0001524757 · CEO, Southern Nuclear

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 126,528.1563

F1 · security: Shares were sold pursuant to a Rule 10b5-1 plan.

SEC source: 0001209191-24-003438 · doc4.xml · nonDerivative · entry 2

Cummiskey Christopher · CIK 0001642170 · EVP & CCCS Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 22,502.4417

SEC source: 0001209191-24-003497 · doc4.xml · nonDerivative · entry 1

Thomas Lizanne · CIK 0001305419 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 700

SEC source: 0001209191-24-003438 · doc4.xml · nonDerivative · entry 1

Cummiskey Christopher · CIK 0001642170 · EVP & CCCS Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 23,404.4417

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

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,726

Underlying: Southern Company Common Stock · 3,726 shares

Expires not disclosed

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

F3 · shares: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

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

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 84,000.5176

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

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

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,818.5176

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

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

SEC source: 0001209191-24-003351 · doc4.xml · derivative · entry 3

Anderson Bryan D · CIK 0001831824 · EVP & Pres. External Affairs

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,553

Underlying: Southern Company Common Stock · 1,553 shares

Expires not disclosed

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

F3 · shares: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-24-003351 · doc4.xml · nonDerivative · entry 2

Anderson Bryan D · CIK 0001831824 · EVP & Pres. External Affairs

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,032

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

SEC source: 0001209191-24-003351 · doc4.xml · nonDerivative · entry 1

Anderson Bryan D · CIK 0001831824 · EVP & Pres. External Affairs

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,843

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

F1 · shares: Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on February 13, 2022. Includes 124 accrued dividend equivalent units.

SEC source: 0001209191-24-003349 · doc4.xml · derivative · entry 4

Tucker Daniel S · CIK 0001881495 · Executive Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,467

Underlying: Southern Company Common Stock · 2,466 shares

Expires not disclosed

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

F3 · shares: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-24-003349 · doc4.xml · nonDerivative · entry 2

Tucker Daniel S · CIK 0001881495 · Executive Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,153

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

SEC source: 0001209191-24-003349 · doc4.xml · nonDerivative · entry 1

Tucker Daniel S · CIK 0001881495 · Executive Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,302

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

F1 · shares: Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on February 13, 2022. Includes 199 accrued dividend equivalent units.

SEC source: 0001209191-24-003347 · doc4.xml · derivative · entry 4

Wilson Anthony L · CIK 0001538652 · Chairman, President & CEO, MPC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,476

Underlying: Southern Company Common Stock · 1,476 shares

Expires not disclosed

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

F3 · shares: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-24-003347 · doc4.xml · nonDerivative · entry 2

Wilson Anthony L · CIK 0001538652 · Chairman, President & CEO, MPC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,218

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

SEC source: 0001209191-24-003347 · doc4.xml · nonDerivative · entry 1

Wilson Anthony L · CIK 0001538652 · Chairman, President & CEO, MPC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,927

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

F1 · shares: Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on February 13, 2022. Includes 120 accrued dividend equivalent units.

SEC source: 0001209191-24-003346 · doc4.xml · derivative · entry 4

Spainhour Sterling A Jr. · CIK 0001849295 · EVP, Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 662

Underlying: Southern Company Common Stock · 662 shares

Expires not disclosed

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

F3 · shares: Represents second 1/3 of restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.exercise_date: Represents second 1/3 of restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.expiration_date: Represents second 1/3 of restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-24-003346 · doc4.xml · nonDerivative · entry 2

Spainhour Sterling A Jr. · CIK 0001849295 · EVP, Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,880

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

SEC source: 0001209191-24-003346 · doc4.xml · nonDerivative · entry 1

Spainhour Sterling A Jr. · CIK 0001849295 · EVP, Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,204

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

F1 · shares: Shares acquired upon vesting of second 1/3 of restricted stock units granted on February 13, 2022. Includes 54 accrued dividend equivalent units.

SEC source: 0001209191-24-003345 · doc4.xml · derivative · entry 4

Poroch David P. · CIK 0001616250 · Comptroller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 429

Underlying: Southern Company Common Stock · 429 shares

Expires not disclosed

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

F3 · shares: Represents second 1/3 of restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.exercise_date: Represents second 1/3 of restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.expiration_date: Represents second 1/3 of restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-24-003345 · doc4.xml · nonDerivative · entry 2

Poroch David P. · CIK 0001616250 · Comptroller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,596

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

SEC source: 0001209191-24-003345 · doc4.xml · nonDerivative · entry 1

Poroch David P. · CIK 0001616250 · Comptroller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,737

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 · shares: Shares acquired upon vesting of second 1/3 of restricted stock units granted on February 13, 2022. Includes 35 accrued dividend equivalent units.

SEC source: 0001209191-24-003344 · doc4.xml · derivative · entry 3

Kuczynski Stephen E · CIK 0001524757 · CEO, Southern Nuclear

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,285

Underlying: Southern Company Common Stock · 3,285 shares

Expires not disclosed

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

F3 · shares: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-24-003344 · doc4.xml · nonDerivative · entry 2

Kuczynski Stephen E · CIK 0001524757 · CEO, Southern Nuclear

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 131,528.1563

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

SEC source: 0001209191-24-003344 · doc4.xml · nonDerivative · entry 1

Kuczynski Stephen E · CIK 0001524757 · CEO, Southern Nuclear

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 133,103.1563

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 · shares: Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on February 13, 2022. Includes 266 accrued dividend equivalent units.

SEC source: 0001209191-24-003341 · doc4.xml · derivative · entry 4

Kerr, II James Y · CIK 0001601624 · Chairman, President & CEO, GAS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,749

Underlying: Southern Company Common Stock · 2,748 shares

Expires not disclosed

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

F3 · shares: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-24-003341 · doc4.xml · nonDerivative · entry 2

Kerr, II James Y · CIK 0001601624 · Chairman, President & CEO, GAS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 192,088

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

SEC source: 0001209191-24-003341 · doc4.xml · nonDerivative · entry 1

Kerr, II James Y · CIK 0001601624 · Chairman, President & CEO, GAS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 193,429

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

F1 · shares: Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on February 13, 2022. Includes 222 accrued dividend equivalent units.

SEC source: 0001209191-24-003343 · doc4.xml · derivative · entry 3

Greene Kimberly S, · CIK 0001573512 · Chairman, President & CEO, GPC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,991

Underlying: Southern Company Common Stock · 2,990 shares

Expires not disclosed

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

F3 · shares: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-24-003343 · doc4.xml · nonDerivative · entry 2

Greene Kimberly S, · CIK 0001573512 · Chairman, President & CEO, GPC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 130,630

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

SEC source: 0001209191-24-003343 · doc4.xml · nonDerivative · entry 1

Greene Kimberly S, · CIK 0001573512 · Chairman, President & CEO, GPC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 132,089

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

F1 · shares: Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on February 13, 2022. Includes 242 accrued dividend equivalent units.

SEC source: 0001209191-24-003342 · doc4.xml · derivative · entry 3

DAVIS MARTIN BERNARD · CIK 0001674959 · EVP and CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,593

Underlying: Southern Company Common Stock · 1,593 shares

Expires not disclosed

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

F3 · shares: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-24-003342 · doc4.xml · nonDerivative · entry 2

DAVIS MARTIN BERNARD · CIK 0001674959 · EVP and CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 89,563

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

SEC source: 0001209191-24-003342 · doc4.xml · nonDerivative · entry 1

DAVIS MARTIN BERNARD · CIK 0001674959 · EVP and CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 90,341

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

F1 · shares: Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on February 13, 2022. Includes 129 accrued dividend equivalent units.

SEC source: 0001209191-24-003340 · doc4.xml · derivative · entry 4

Cummiskey Christopher · CIK 0001642170 · EVP & CCCS Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,524

Underlying: Southern Company Common Stock · 1,524 shares

Expires not disclosed

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

F3 · shares: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 13, 2022. The remaining 1/3 of the award will vest in 2025. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-24-003340 · doc4.xml · nonDerivative · entry 2

Cummiskey Christopher · CIK 0001642170 · EVP & CCCS Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,389.4417

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