SO

SEC source: 0000950170-25-016414 · ownership.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: 6,358

Underlying: Southern Company Common Stock · 3,179 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 January 31, 2024. The remaining award will vest 1/3 in 2026 and 1/3 in 2027. 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 January 31, 2024. The remaining award will vest 1/3 in 2026 and 1/3 in 2027. 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 January 31, 2024. The remaining award will vest 1/3 in 2026 and 1/3 in 2027. 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: 0000950170-25-016414 · ownership.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: 169,348

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

SEC source: 0000950170-25-016414 · ownership.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: 186,007

F3 · shares: Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2022-2024 award. The Compensation and Talent Development Committee certified performance on February 5, 2025. Includes accrued dividend equivalent units.

SEC source: 0000950170-25-016414 · ownership.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: 148,690

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

SEC source: 0000950170-25-016414 · ownership.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: 150,162

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 first 1/3 of performance restricted stock units granted on January 31, 2024. The Compensation and Talent Development Committee certified performance on February 5, 2025. Includes 116 accrued dividend equivalent units.

SEC source: 0000950170-25-014427 · ownership.xml · nonDerivative · entry 1

Cummiskey Christopher · CIK 0001642170 · EVP & CCO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 22,502.4417

SEC source: 0000950170-25-013209 · ownership.xml · derivative · entry 5

Sena Peter P III · CIK 0002023851 · Chairman,President & CEO, SNC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,573

Underlying: Southern Company Common Stock · 1,573 shares

Expires not disclosed

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

F5 · shares: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F5 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F5 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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: 0000950170-25-013209 · ownership.xml · nonDerivative · entry 2

Sena Peter P III · CIK 0002023851 · Chairman,President & CEO, SNC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 871

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

SEC source: 0000950170-25-013209 · ownership.xml · nonDerivative · entry 1

Sena Peter P III · CIK 0002023851 · Chairman,President & CEO, SNC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,625

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 1, 2023. Includes 125 accrued dividend equivalent units.

SEC source: 0000950170-25-013208 · ownership.xml · derivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,895

Underlying: Southern Company Common Stock · 2,895 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 1, 2023. The remaining award will vest 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.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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: 0000950170-25-013208 · ownership.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,381

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

SEC source: 0000950170-25-013208 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,837

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 1, 2023. Includes 230 accrued dividend equivalent units.

SEC source: 0000950170-25-013207 · ownership.xml · derivative · entry 4

Connally Stan W · CIK 0001498337 · EVP & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,364

Underlying: Southern Company Common Stock · 2,363 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 1, 2023. The remaining award will vest 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.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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: 0000950170-25-013207 · ownership.xml · nonDerivative · entry 2

Connally Stan W · CIK 0001498337 · EVP & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 138,938

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

SEC source: 0000950170-25-013207 · ownership.xml · nonDerivative · entry 1

Connally Stan W · CIK 0001498337 · EVP & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 140,139

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 1, 2023. Includes 188 accrued dividend equivalent units.

SEC source: 0000950170-25-013206 · ownership.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,825

Underlying: Southern Company Common Stock · 1,824 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 1, 2023. The remaining award will vest 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.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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: 0000950170-25-013206 · ownership.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,375

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

SEC source: 0000950170-25-013206 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,436

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 1, 2023. Includes 145 accrued dividend equivalent units.

SEC source: 0000950170-25-013205 · ownership.xml · derivative · entry 3

DAVIS MARTIN BERNARD · CIK 0001674959 · EVP and CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,607

Underlying: Southern Company Common Stock · 1,607 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 1, 2023. The remaining award will vest 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.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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: 0000950170-25-013205 · ownership.xml · nonDerivative · entry 2

DAVIS MARTIN BERNARD · CIK 0001674959 · EVP and CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 89,277

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

SEC source: 0000950170-25-013205 · ownership.xml · nonDerivative · entry 1

DAVIS MARTIN BERNARD · CIK 0001674959 · EVP and CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 90,128

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 1, 2023. Includes 128 accrued dividend equivalent units.

SEC source: 0000950170-25-013212 · ownership.xml · derivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,124

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.

F3 · shares: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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: 0000950170-25-013212 · ownership.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,901

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

SEC source: 0000950170-25-013212 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,000

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 1, 2023. Includes 169 accrued dividend equivalent units.

SEC source: 0000950170-25-013213 · ownership.xml · derivative · entry 4

Cummiskey Christopher · CIK 0001642170 · Chairman, President & CEO, SCS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,537

Underlying: Southern Company Common Stock · 1,537 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 1, 2023. The remaining award will vest 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.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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: 0000950170-25-013213 · ownership.xml · nonDerivative · entry 2

Cummiskey Christopher · CIK 0001642170 · Chairman, President & CEO, SCS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,339.4417

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

SEC source: 0000950170-25-013213 · ownership.xml · nonDerivative · entry 1

Cummiskey Christopher · CIK 0001642170 · Chairman, President & CEO, SCS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,161.4417

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 1, 2023. Includes 122 accrued dividend equivalent units.

SEC source: 0000950170-25-013204 · ownership.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,594

Underlying: Southern Company Common Stock · 3,594 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 1, 2023. The remaining award will vest 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.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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: 0000950170-25-013204 · ownership.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 112,714

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

SEC source: 0000950170-25-013204 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 114,510

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 1, 2023. Includes 286 accrued dividend equivalent units.

SEC source: 0000950170-25-013203 · ownership.xml · derivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,313

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.

F3 · shares: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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: 0000950170-25-013203 · ownership.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,453.7006

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

SEC source: 0000950170-25-013203 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 78,566.7006

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 1, 2023. Includes 343 accrued dividend equivalent units.

SEC source: 0000950170-25-013211 · ownership.xml · derivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,632

Underlying: Southern Company Common Stock · 2,631 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 1, 2023. The remaining award will vest 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.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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: 0000950170-25-013211 · ownership.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,656

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

SEC source: 0000950170-25-013211 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,993

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 1, 2023. Includes 209 accrued dividend equivalent units.

SEC source: 0000950170-25-013202 · ownership.xml · derivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,546

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.

F3 · shares: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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: 0000950170-25-013202 · ownership.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,023

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

SEC source: 0000950170-25-013202 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,837

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 1, 2023. Includes 123 accrued dividend equivalent units.

SEC source: 0000950170-25-013210 · ownership.xml · derivative · entry 6

Poroch David P. · CIK 0001616250 · Comptroller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 655

Underlying: Southern Company Common Stock · 655 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 second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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 second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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 second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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: 0000950170-25-013210 · ownership.xml · nonDerivative · entry 2

Poroch David P. · CIK 0001616250 · Comptroller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,092

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

SEC source: 0000950170-25-013210 · ownership.xml · nonDerivative · entry 1

Poroch David P. · CIK 0001616250 · Comptroller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,303

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 1, 2023. Includes 52 accrued dividend equivalent units.

SEC source: 0000950170-25-013201 · ownership.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: 3,086

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.

F3 · shares: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F3 · derivative.exercise_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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.

F3 · derivative.expiration_date: Represents second 1/3 of performance restricted stock units granted on February 1, 2023. The remaining award will vest 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: 0000950170-25-013201 · ownership.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: 146,867

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

SEC source: 0000950170-25-013201 · ownership.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: 148,420

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 1, 2023. Includes 246 accrued dividend equivalent units.

SEC source: 0000950170-25-013209 · ownership.xml · derivative · entry 6

Sena Peter P III · CIK 0002023851 · Chairman,President & CEO, SNC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,272

Underlying: Southern Company Common Stock · 1,637 shares

Expires not disclosed

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

F6 · shares: Represents first 1/3 of restricted stock units granted on January 31, 2024. The remaining award will vest 1/3 in 2026 and 1/3 in 2027. 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.

F6 · derivative.exercise_date: Represents first 1/3 of restricted stock units granted on January 31, 2024. The remaining award will vest 1/3 in 2026 and 1/3 in 2027. 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.

F6 · derivative.expiration_date: Represents first 1/3 of restricted stock units granted on January 31, 2024. The remaining award will vest 1/3 in 2026 and 1/3 in 2027. 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: 0000950170-25-013209 · ownership.xml · nonDerivative · entry 4

Sena Peter P III · CIK 0002023851 · Chairman,President & CEO, SNC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,744

F4 · shares: Shares withheld to satisfy required state and federal tax withholding requirements.

SEC source: 0000950170-25-013209 · ownership.xml · nonDerivative · entry 3

Sena Peter P III · CIK 0002023851 · Chairman,President & CEO, SNC

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,568

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 restricted stock units granted on January 31, 2024. Includes 60 accrued dividend equivalent units.

SEC source: 0000950170-25-013210 · ownership.xml · derivative · entry 7

Poroch David P. · CIK 0001616250 · Comptroller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,352

Underlying: Southern Company Common Stock · 676 shares

Expires not disclosed

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

F5 · shares: Represents first 1/3 of restricted stock units granted on January 31, 2024. The remaining award will vest 1/3 in 2026 and 1/3 in 2027. 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.

F5 · derivative.exercise_date: Represents first 1/3 of restricted stock units granted on January 31, 2024. The remaining award will vest 1/3 in 2026 and 1/3 in 2027. 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.

F5 · derivative.expiration_date: Represents first 1/3 of restricted stock units granted on January 31, 2024. The remaining award will vest 1/3 in 2026 and 1/3 in 2027. 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: 0000950170-25-013210 · ownership.xml · nonDerivative · entry 4

Poroch David P. · CIK 0001616250 · Comptroller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,468

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