SO

SEC source: 0000950170-25-013210 · ownership.xml · nonDerivative · entry 3

Poroch David P. · CIK 0001616250 · Comptroller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,793

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 25 accrued dividend equivalent units.

SEC source: 0000950170-25-001785 · ownership.xml · derivative · entry 1

Akella Janaki · CIK 0001763595 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,421.0896

Underlying: Southern Company Common Stock · 516.2779 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: 0000950170-25-001784 · ownership.xml · derivative · entry 1

Svinicki Kristine L · CIK 0001889194 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,297.4846

Underlying: Southern Company Common Stock · 516.2779 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: 0000950170-25-001783 · ownership.xml · derivative · entry 1

SMITH WILLIAM G JR · CIK 0000909019 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 150,156.8262

Underlying: Southern Company Common Stock · 956.6327 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: 0000950170-25-001782 · ownership.xml · derivative · entry 1

Klein Dale E. · CIK 0001493467 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,770.2409

Underlying: Southern Company Common Stock · 516.2779 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: 0000950170-25-001781 · ownership.xml · derivative · entry 1

JOHNS JOHN D · CIK 0001189571 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,570.5533

Underlying: Southern Company Common Stock · 516.2779 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: 0000950170-25-001780 · ownership.xml · derivative · entry 1

EARLEY ANTHONY F JR · CIK 0001167316 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,590.4547

Underlying: Southern Company Common Stock · 798.7123 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: 0000950170-25-001787 · ownership.xml · derivative · entry 1

Thomas Lizanne · CIK 0001305419 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,641.7406

Underlying: Southern Company Common Stock · 516.2779 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: 0000950170-25-001786 · ownership.xml · derivative · entry 1

MEADOR DAVID E · CIK 0001167313 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,006.1721

Underlying: Southern Company Common Stock · 880.7094 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: 0000950170-25-001779 · ownership.xml · derivative · entry 1

Clark Henry A III · CIK 0001474932 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 69,699.3877

Underlying: Southern Company Common Stock · 880.7094 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: 0000950170-25-001778 · ownership.xml · derivative · entry 1

GRAIN DAVID J · CIK 0001249303 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 77,745.517

Underlying: Southern Company Common Stock · 941.448 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: 0000950170-25-001777 · ownership.xml · derivative · entry 1

JAMES DONALD M · CIK 0001188417 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 192,886.8577

Underlying: Southern Company Common Stock · 516.2779 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: 0000950170-25-001776 · ownership.xml · derivative · entry 1

Cooper Shantella E. · CIK 0001698291 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,348.894

Underlying: Southern Company Common Stock · 880.7094 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: 0000950170-24-134060 · ownership.xml · nonDerivative · entry 1

DAVIS MARTIN BERNARD · CIK 0001674959 · EVP and CIO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 88,393

SEC source: 0000950170-24-134059 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 73,910.7006

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $86.00 to $86.37, inclusive. The reporting person undertakes to provide to Southern Company, any security holder of Southern Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4.

SEC source: 0000950170-24-127530 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 137,588

F1 · security: Shares were a charitable donation to a donor advised fund.

SEC source: 0000950170-24-121427 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 11,707

SEC source: 0000950170-24-113425 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 145,088

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.36 to $89.85, inclusive. The reporting person undertakes to provide to Southern Company, any security holder of Southern Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4.

SEC source: 0000950170-24-111647 · ownership.xml · derivative · entry 1

Thomas Lizanne · CIK 0001305419 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,090.7341

Underlying: Southern Company Common Stock · 467.6496 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: 0000950170-24-111640 · ownership.xml · derivative · entry 1

Svinicki Kristine L · CIK 0001889194 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,715.7037

Underlying: Southern Company Common Stock · 467.6496 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: 0000950170-24-111636 · ownership.xml · derivative · entry 1

SMITH WILLIAM G JR · CIK 0000909019 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 147,944.2114

Underlying: Southern Company Common Stock · 866.5273 shares

Expires not disclosed

F1 · date: 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: 0000950170-24-111623 · ownership.xml · derivative · entry 1

MEADOR DAVID E · CIK 0001167313 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,090.7341

Underlying: Southern Company Common Stock · 467.6496 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: 0000950170-24-111614 · ownership.xml · derivative · entry 1

Cooper Shantella E. · CIK 0001698291 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,245.3728

Underlying: Southern Company Common Stock · 797.7553 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: 0000950170-24-111605 · ownership.xml · derivative · entry 1

Klein Dale E. · CIK 0001493467 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,814.084

Underlying: Southern Company Common Stock · 467.6496 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: 0000950170-24-111596 · ownership.xml · derivative · entry 1

JOHNS JOHN D · CIK 0001189571 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 78,807.9624

Underlying: Southern Company Common Stock · 467.6496 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: 0000950170-24-111582 · ownership.xml · derivative · entry 1

GRAIN DAVID J · CIK 0001249303 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,157.5248

Underlying: Southern Company Common Stock · 852.7729 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: 0000950170-24-111589 · ownership.xml · derivative · entry 1

JAMES DONALD M · CIK 0001188417 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 190,751.1851

Underlying: Southern Company Common Stock · 467.6496 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: 0000950170-24-111569 · ownership.xml · derivative · entry 1

EARLEY ANTHONY F JR · CIK 0001167316 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,574.6248

Underlying: Southern Company Common Stock · 787.4395 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: 0000950170-24-111535 · ownership.xml · derivative · entry 1

Clark Henry A III · CIK 0001474932 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,239.3558

Underlying: Southern Company Common Stock · 797.7553 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: 0000950170-24-111525 · ownership.xml · derivative · entry 1

Akella Janaki · CIK 0001763595 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,762.5052

Underlying: Southern Company Common Stock · 467.6496 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: 0000950170-24-104803 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 44,467

SEC source: 0000950170-24-091716 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 12,500

SEC source: 0000950170-24-091724 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 84,168

F1 · security: Shares were a charitable donation to a donor advised fund.

SEC source: 0000950170-24-082058 · ownership.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 85,309

SEC source: 0000950170-24-081294 · ownership.xml · nonDerivative · entry 1

Drake Sloane N · CIK 0001971188 · EVP, CHRO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,771

SEC source: 0000950170-24-081156 · ownership.xml · derivative · entry 1

Akella Janaki · CIK 0001763595 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,163.2243

Underlying: Southern Company Common Stock · 551.9481 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: 0000950170-24-081155 · ownership.xml · derivative · entry 1

Cooper Shantella E. · CIK 0001698291 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,242.0494

Underlying: Southern Company Common Stock · 941.5584 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: 0000950170-24-081154 · ownership.xml · derivative · entry 1

Thomas Lizanne · CIK 0001305419 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,593.8169

Underlying: Southern Company Common Stock · 551.9481 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: 0000950170-24-081153 · ownership.xml · derivative · entry 1

Svinicki Kristine L · CIK 0001889194 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,189.5037

Underlying: Southern Company Common Stock · 551.9481 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: 0000950170-24-081151 · ownership.xml · derivative · entry 1

SMITH WILLIAM G JR · CIK 0000909019 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 145,889.5777

Underlying: Southern Company Common Stock · 1,022.7273 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: 0000950170-24-081150 · ownership.xml · derivative · entry 1

MEADOR DAVID E · CIK 0001167313 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,593.8169

Underlying: Southern Company Common Stock · 551.9481 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: 0000950170-24-081149 · ownership.xml · derivative · entry 1

Klein Dale E. · CIK 0001493467 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,931.6534

Underlying: Southern Company Common Stock · 551.9481 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: 0000950170-24-081146 · ownership.xml · derivative · entry 1

JOHNS JOHN D · CIK 0001189571 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 77,694.8389

Underlying: Southern Company Common Stock · 551.9481 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: 0000950170-24-081145 · ownership.xml · derivative · entry 1

JAMES DONALD M · CIK 0001188417 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 188,746.4085

Underlying: Southern Company Common Stock · 551.9481 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: 0000950170-24-081143 · ownership.xml · derivative · entry 1

GRAIN DAVID J · CIK 0001249303 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,696.4337

Underlying: Southern Company Common Stock · 1,028.1386 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: 0000950170-24-081142 · ownership.xml · derivative · entry 1

Clark Henry A III · CIK 0001474932 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,896.8014

Underlying: Southern Company Common Stock · 941.5584 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: 0000950170-24-081141 · ownership.xml · derivative · entry 1

EARLEY ANTHONY F JR · CIK 0001167316 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,546.059

Underlying: Southern Company Common Stock · 957.7922 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: 0001209191-24-005683 · 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: 175,088

F1 · security: Shares were a bona fide gift to a charitable organization.

SEC source: 0001209191-24-005462 · doc4.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 110,630

SEC source: 0001209191-24-005462 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 121,504

F1 · price: The price reported in Column 4 is a weighted average price. These were sold in multiple transactions at prices ranging from $75.00 to $75.09, inclusive. The reporting person undertakes to provide to Southern Company, any security holder of Southern Company, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4.