SO

SEC source: 0001209191-24-003340 · doc4.xml · nonDerivative · entry 1

Cummiskey Christopher · CIK 0001642170 · EVP & CCCS Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,133.4417

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 122 accrued dividend equivalent units.

SEC source: 0001209191-24-003339 · doc4.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,161

Underlying: Southern Company Common Stock · 2,161 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: 0001209191-24-003339 · doc4.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 140,389

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

SEC source: 0001209191-24-003339 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 141,425

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 173 accrued dividend equivalent units.

SEC source: 0001209191-24-003335 · doc4.xml · derivative · entry 4

Drake Sloane N · CIK 0001971188 · EVP, CHRO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 636

Underlying: Southern Company Common Stock · 636 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: 0001209191-24-003335 · doc4.xml · nonDerivative · entry 2

Drake Sloane N · CIK 0001971188 · EVP, CHRO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,043

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

SEC source: 0001209191-24-003335 · doc4.xml · nonDerivative · entry 1

Drake Sloane N · CIK 0001971188 · EVP, CHRO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,354

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 52 accrued dividend equivalent units.

SEC source: 0001209191-24-003334 · doc4.xml · derivative · entry 4

Peoples James Jeffrey · CIK 0001815666 · Chairman, President & CEO, APC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 758

Underlying: Southern Company Common Stock · 758 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: 0001209191-24-003334 · doc4.xml · nonDerivative · entry 2

Peoples James Jeffrey · CIK 0001815666 · Chairman, President & CEO, APC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,712

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

SEC source: 0001209191-24-003334 · doc4.xml · nonDerivative · entry 1

Peoples James Jeffrey · CIK 0001815666 · Chairman, President & CEO, APC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,077

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 62 accrued dividend equivalent units.

SEC source: 0001209191-24-003190 · doc4.xml · nonDerivative · entry 1

Kuczynski Stephen E · CIK 0001524757 · CEO, Southern Nuclear

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 129,552.1563

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

SEC source: 0001209191-24-003166 · doc4.xml · nonDerivative · entry 1

Cummiskey Christopher · CIK 0001642170 · EVP & CCCS Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 35,487.4417

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

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,626

Underlying: Southern Company Common Stock · 4,313 shares

Expires not disclosed

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

F4 · shares: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F4 · derivative.exercise_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F4 · derivative.expiration_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

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

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,790.5176

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

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

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,817.5176

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

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

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

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 79,325.5176

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

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

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 105,671.5176

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

SEC source: 0001209191-24-003052 · doc4.xml · derivative · entry 6

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,092

Underlying: Southern Company Common Stock · 1,546 shares

Expires not disclosed

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

F4 · shares: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F4 · derivative.exercise_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F4 · derivative.expiration_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-24-003052 · doc4.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 91,331

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

SEC source: 0001209191-24-003052 · doc4.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,042

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

F3 · shares: Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 1, 2023. The Compensation and Talent Development Committee certified performance on February 7, 2024. Includes 64 accrued dividend equivalent units.

SEC source: 0001209191-24-003052 · 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: 90,432

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

SEC source: 0001209191-24-003052 · 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: 100,891

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

SEC source: 0001209191-24-003051 · doc4.xml · derivative · entry 6

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,263

Underlying: Southern Company Common Stock · 2,632 shares

Expires not disclosed

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

F4 · shares: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F4 · derivative.exercise_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F4 · derivative.expiration_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-24-003051 · doc4.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,637

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

SEC source: 0001209191-24-003051 · doc4.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,870

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

F3 · shares: Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 1, 2023. The Compensation and Talent Development Committee certified performance on February 7, 2024. Includes 109 accrued dividend equivalent units.

SEC source: 0001209191-24-003051 · 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: 43,129

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

SEC source: 0001209191-24-003051 · 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: 46,279

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

SEC source: 0001209191-24-003049 · doc4.xml · derivative · entry 6

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,248

Underlying: Southern Company Common Stock · 2,124 shares

Expires not disclosed

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

F4 · shares: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F4 · derivative.exercise_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F4 · derivative.expiration_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-24-003049 · doc4.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,488

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

SEC source: 0001209191-24-003049 · doc4.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,546

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

F3 · shares: Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 1, 2023. The Compensation and Talent Development Committee certified performance on February 7, 2024. Includes 88 accrued dividend equivalent units.

SEC source: 0001209191-24-003049 · 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: 13,334

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

SEC source: 0001209191-24-003049 · 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: 16,621

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

SEC source: 0001209191-24-003048 · doc4.xml · nonDerivative · entry 2

Poroch David P. · CIK 0001616250 · Comptroller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,273

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

SEC source: 0001209191-24-003048 · doc4.xml · nonDerivative · entry 1

Poroch David P. · CIK 0001616250 · Comptroller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,318

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

SEC source: 0001209191-24-003047 · doc4.xml · derivative · entry 6

Peoples James Jeffrey · CIK 0001815666 · Chairman, President & CEO, APC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,790

Underlying: Southern Company Common Stock · 2,896 shares

Expires not disclosed

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

F4 · shares: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F4 · derivative.exercise_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F4 · derivative.expiration_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-24-003047 · doc4.xml · nonDerivative · entry 4

Peoples James Jeffrey · CIK 0001815666 · Chairman, President & CEO, APC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,257

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

SEC source: 0001209191-24-003047 · doc4.xml · nonDerivative · entry 3

Peoples James Jeffrey · CIK 0001815666 · Chairman, President & CEO, APC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,629

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

F3 · shares: Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 1, 2023. The Compensation and Talent Development Committee certified performance on February 7, 2024. Includes 120 accrued dividend equivalent units.

SEC source: 0001209191-24-003047 · doc4.xml · nonDerivative · entry 2

Peoples James Jeffrey · CIK 0001815666 · Chairman, President & CEO, APC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,613

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

SEC source: 0001209191-24-003047 · doc4.xml · nonDerivative · entry 1

Peoples James Jeffrey · CIK 0001815666 · Chairman, President & CEO, APC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,038

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

SEC source: 0001209191-24-003046 · doc4.xml · derivative · entry 5

Kuczynski Stephen E · CIK 0001524757 · CEO, Southern Nuclear

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,627

Underlying: Southern Company Common Stock · 3,314 shares

Expires not disclosed

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

F4 · shares: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F4 · derivative.exercise_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F4 · derivative.expiration_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-24-003046 · doc4.xml · nonDerivative · entry 4

Kuczynski Stephen E · CIK 0001524757 · CEO, Southern Nuclear

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 134,552.1563

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

SEC source: 0001209191-24-003046 · doc4.xml · nonDerivative · entry 3

Kuczynski Stephen E · CIK 0001524757 · CEO, Southern Nuclear

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 136,084.1563

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

F3 · shares: Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 1, 2023. The Compensation and Talent Development Committee certified performance on February 7, 2024. Includes 138 accrued dividend equivalent units.

SEC source: 0001209191-24-003046 · doc4.xml · nonDerivative · entry 2

Kuczynski Stephen E · CIK 0001524757 · CEO, Southern Nuclear

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 132,632.1563

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

SEC source: 0001209191-24-003046 · doc4.xml · nonDerivative · entry 1

Kuczynski Stephen E · CIK 0001524757 · CEO, Southern Nuclear

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 155,910.1563

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

SEC source: 0001209191-24-003045 · doc4.xml · derivative · entry 6

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,172

Underlying: Southern Company Common Stock · 3,086 shares

Expires not disclosed

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

F4 · shares: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F4 · derivative.exercise_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F4 · derivative.expiration_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-24-003045 · doc4.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 190,459

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

SEC source: 0001209191-24-003045 · doc4.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 191,749

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

F3 · shares: Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 1, 2023. The Compensation and Talent Development Committee certified performance on February 7, 2024. Includes 128 accrued dividend equivalent units.

SEC source: 0001209191-24-003045 · 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: 188,535

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

SEC source: 0001209191-24-003045 · 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: 207,928

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

SEC source: 0001209191-24-003044 · doc4.xml · derivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,188

Underlying: Southern Company Common Stock · 3,595 shares

Expires not disclosed

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

F4 · shares: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F4 · derivative.exercise_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F4 · derivative.expiration_date: Represents first 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 1/3 in 2025 and 1/3 in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.