SO

SEC source: 0001209191-19-000461 · doc4a.xml · derivative · entry 1

Klein Dale E. · CIK 0001493467 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,688.0121

Underlying: Southern Company Common Stock · 810.5604 shares

Expires not disclosed

F1 · shares: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date. Amendment filed to correct the total number of deferred stock units beneficially owned under the Deferred Compensation Plan on October 1, 2018. The price of the derivative security was based on the closing price as of September 28, 2018 rather than October 1, 2018. The correction results in an increase to the total number of deferred stock units beneficially owned.

F2 · derivative.exercise_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F2 · derivative.expiration_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F3 · balance_after: Includes dividends accrued on March 6, June 6, September 6 and December 6, 2018.

SEC source: 0001209191-19-000455 · doc4a.xml · derivative · entry 1

JOHNS JOHN D · CIK 0001189571 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 50,347.6526

Underlying: Southern Company Common Stock · 1,563.2237 shares

Expires not disclosed

F1 · shares: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date. Amendment filed to correct the total number of deferred stock units issued under the Deferred Compensation Plan on October 1, 2018. The price used to determine the number of deferred stock units issued was based on the closing price as of September 28, 2018 rather than October 1, 2018.

F2 · derivative.exercise_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F2 · derivative.expiration_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F3 · balance_after: Includes dividends accrued on March 6, June 6, September 6 and December 6, 2018.

SEC source: 0001209191-19-000450 · doc4a.xml · derivative · entry 1

JAMES DONALD M · CIK 0001188417 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 136,580.1548

Underlying: Southern Company Common Stock · 810.5604 shares

Expires not disclosed

F1 · shares: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date. Amendment filed to correct the total number of deferred stock units beneficially owned under the Deferred Compensation Plan on October 1, 2018. The price of the derivative security was based on the closing price as of September 28, 2018 rather than October 1, 2018. The correction results in an increase to the total number of deferred stock units beneficially owned.

F2 · derivative.exercise_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F2 · derivative.expiration_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F3 · balance_after: Includes dividends accrued on March 6, June 6, September 6 and December 6, 2018.

SEC source: 0001209191-19-000448 · doc4a.xml · derivative · entry 1

Clark Henry A III · CIK 0001474932 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,199.2441

Underlying: Southern Company Common Stock · 810.5604 shares

Expires not disclosed

F1 · shares: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date. Amendment filed to correct the total number of deferred stock units beneficially owned under the Deferred Compensation Plan on October 1, 2018. The price of the derivative security was based on the closing price as of September 28, 2018 rather than October 1, 2018. The correction results in an increase to the total number of deferred stock units beneficially owned.

F2 · derivative.exercise_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F2 · derivative.expiration_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F3 · balance_after: Includes dividends accrued on March 6, June 6, September 6 and December 6, 2018.

SEC source: 0001209191-19-000447 · doc4a.xml · derivative · entry 1

BOSCIA JON A · CIK 0001157628 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,870.9896

Underlying: Southern Company Common Stock · 810.5604 shares

Expires not disclosed

F1 · shares: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date. Amendment filed to correct the total number of deferred stock units issued under the Deferred Compensation Plan on October 1, 2018. The price used to determine the number of deferred stock units issued was based on the closing price as of September 28, 2018 rather than October 1, 2018.

F2 · derivative.exercise_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F2 · derivative.expiration_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F3 · balance_after: Includes dividends accrued on March 6, June 6, September 6 and December 6, 2018.

SEC source: 0001209191-19-000441 · doc4a.xml · derivative · entry 1

BARANCO JUANITA P · CIK 0001198001 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 106,571.4663

Underlying: Southern Company Common Stock · 1,447.4294 shares

Expires not disclosed

F1 · shares: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date. Amendment filed to correct the total number of deferred stock units issued under the Deferred Compensation Plan on October 1, 2018. The price used to determine the number of deferred stock units issued was based on the closing price as of September 28, 2018 rather than October 1, 2018.

F2 · derivative.exercise_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F2 · derivative.expiration_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F3 · balance_after: Includes dividends accrued on March 6, June 6, September 6 and December 6, 2018.

SEC source: 0001209191-19-000671 · doc4a.xml · derivative · entry 1

HAGEN VERONICA M · CIK 0001281028 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 68,786.8265

Underlying: Southern Company Common Stock · 1,447.4294 shares

Expires not disclosed

F1 · shares: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date. Amendment filed to correct the total number of deferred stock units beneficially owned under the Deferred Compensation Plan on October 1, 2018. The price of the derivative security was based on the closing price as of September 28, 2018 rather than October 1, 2018. The correction results in an increase to the total number of deferred stock units beneficially owned.

F2 · derivative.exercise_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F2 · derivative.expiration_date: Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.

F3 · balance_after: Includes dividends accrued on March 6, June 6, September 6 and December 6, 2018.

SEC source: 0001209191-18-052823 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,852.8874

Underlying: Southern Company Common Stock · 125.1719 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-051261 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,727.7155

Underlying: Southern Company Common Stock · 124.3165 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-050312 · doc4.xml · derivative · entry 1

Lantrip Mark · CIK 0001600639 · President & CEO, SCS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Southern Company Common Stock · 15,267.9025 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. There is no exercise or expiration date. This transaction represents a transfer from the phantom stock account into an alternative investment account, which is permitted under the Company's Deferred Compensation Plan at any time.

F1 · derivative.exercise_date: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. There is no exercise or expiration date. This transaction represents a transfer from the phantom stock account into an alternative investment account, which is permitted under the Company's Deferred Compensation Plan at any time.

F1 · derivative.expiration_date: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. There is no exercise or expiration date. This transaction represents a transfer from the phantom stock account into an alternative investment account, which is permitted under the Company's Deferred Compensation Plan at any time.

SEC source: 0001209191-18-049245 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,603.399

Underlying: Southern Company Common Stock · 123.5007 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-047632 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,479.8983

Underlying: Southern Company Common Stock · 116.1911 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-047457 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,165.1266

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $47.40 to $47.415, 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 (1) to this Form 4.

SEC source: 0001209191-18-045546 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,363.7072

Underlying: Southern Company Common Stock · 111.5368 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-043628 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,252.1704

Underlying: Southern Company Common Stock · 114.8463 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-042003 · doc4.xml · nonDerivative · entry 1

Evans Andrew W · CIK 0001338158 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,330

F1 · shares: On July 3, 2018, a Form 4 was filed to report the vesting of 22,900 shares of Southern Company Common Stock pursuant to a performance stock unit award that vested in part on July 1, 2018. Footnote 2 of that filing stated that shares would be withheld to satisfy tax withholding obligations once the amount of the tax withholding is determined. On July 6, 2018, the tax withholding obligation was determined and 14,041 shares were withheld to satisfy the obligation.

SEC source: 0001209191-18-042004 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,137.3241

Underlying: Southern Company Common Stock · 114.2691 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-040481 · doc4.xml · derivative · entry 1

WOOD E JENNER III · CIK 0001015221 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,414.3745

Underlying: Southern Company Common Stock · 755.7763 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-040478 · doc4.xml · derivative · entry 1

Thompson Larry D. · CIK 0001267205 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,824.3418

Underlying: Southern Company Common Stock · 1,457.5686 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-040477 · doc4.xml · derivative · entry 1

Specker Steven R. · CIK 0001503916 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,928.9425

Underlying: Southern Company Common Stock · 755.7763 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-040474 · doc4.xml · derivative · entry 1

Moniz Ernest J · CIK 0001265177 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,800.7158

Underlying: Southern Company Common Stock · 755.7763 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-040476 · doc4.xml · derivative · entry 1

SMITH WILLIAM G JR · CIK 0000909019 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 85,131.3152

Underlying: Southern Company Common Stock · 1,457.5686 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-040472 · doc4.xml · derivative · entry 1

Klein Dale E. · CIK 0001493467 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,787.6833

Underlying: Southern Company Common Stock · 755.7763 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-040469 · doc4.xml · derivative · entry 1

JOHNS JOHN D · CIK 0001189571 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 44,911.0587

Underlying: Southern Company Common Stock · 1,457.5686 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-040462 · doc4.xml · derivative · entry 1

HAGEN VERONICA M · CIK 0001281028 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 62,510.2774

Underlying: Southern Company Common Stock · 1,349.6005 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-040466 · doc4.xml · derivative · entry 1

JAMES DONALD M · CIK 0001188417 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 128,079.4296

Underlying: Southern Company Common Stock · 755.7763 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-040461 · doc4.xml · derivative · entry 1

GRAIN DAVID J · CIK 0001249303 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,649.8945

Underlying: Southern Company Common Stock · 1,457.5686 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-040460 · doc4.xml · derivative · entry 1

Clark Henry A III · CIK 0001474932 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 28,118.3301

Underlying: Southern Company Common Stock · 755.7763 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-040458 · doc4.xml · derivative · entry 1

BOSCIA JON A · CIK 0001157628 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,395.5127

Underlying: Southern Company Common Stock · 755.7763 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-040448 · doc4.xml · derivative · entry 1

BARANCO JUANITA P · CIK 0001198001 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 98,454.1456

Underlying: Southern Company Common Stock · 1,349.6005 shares

Expires not disclosed

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

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

SEC source: 0001209191-19-031547 · doc4a.xml · derivative · entry 1

SMITH WILLIAM G JR · CIK 0000909019 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 85,168.6962

Underlying: Southern Company Common Stock · 1,494.9496 shares

Expires not disclosed

F1 · shares: Amendment filed to correct the number of shares of common stock issuable to Mr. Smith on July 2, 2018, 35.9965 shares of common stock, for his appointment as Audit Committee Chair on May 23, 2018. The total number of common stock beneficially owned includes reinvested dividends.

F2 · derivative.exercise_date: Acquired pursuant to Southern's Deferred Compensation Plan for Outside Directors, payable in stock only upon termination. There is no exercise or expiration date.

F2 · derivative.expiration_date: Acquired pursuant to Southern's Deferred Compensation Plan for Outside Directors, payable in stock only upon termination. There is no exercise or expiration date.

F1 · derivative.underlying_shares: Amendment filed to correct the number of shares of common stock issuable to Mr. Smith on July 2, 2018, 35.9965 shares of common stock, for his appointment as Audit Committee Chair on May 23, 2018. The total number of common stock beneficially owned includes reinvested dividends.

F1 · balance_after: Amendment filed to correct the number of shares of common stock issuable to Mr. Smith on July 2, 2018, 35.9965 shares of common stock, for his appointment as Audit Committee Chair on May 23, 2018. The total number of common stock beneficially owned includes reinvested dividends.

SEC source: 0001209191-18-041089 · doc4.xml · derivative · entry 2

Evans Andrew W · CIK 0001338158 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,905

Underlying: Southern Company Common Stock · 21,068 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: PSU award was granted on September 29, 2016. A portion of the award vests on July 1, 2017, July 1, 2018 and July 1, 2019. The remaining portion of the award will vest based upon achievement of performance goals for the period from January 1, 2017 through December 31, 2019.

F3 · derivative.exercise_date: PSU award was granted on September 29, 2016. A portion of the award vests on July 1, 2017, July 1, 2018 and July 1, 2019. The remaining portion of the award will vest based upon achievement of performance goals for the period from January 1, 2017 through December 31, 2019.

F3 · derivative.expiration_date: PSU award was granted on September 29, 2016. A portion of the award vests on July 1, 2017, July 1, 2018 and July 1, 2019. The remaining portion of the award will vest based upon achievement of performance goals for the period from January 1, 2017 through December 31, 2019.

F3 · derivative.underlying_shares: PSU award was granted on September 29, 2016. A portion of the award vests on July 1, 2017, July 1, 2018 and July 1, 2019. The remaining portion of the award will vest based upon achievement of performance goals for the period from January 1, 2017 through December 31, 2019.

F3 · balance_after: PSU award was granted on September 29, 2016. A portion of the award vests on July 1, 2017, July 1, 2018 and July 1, 2019. The remaining portion of the award will vest based upon achievement of performance goals for the period from January 1, 2017 through December 31, 2019.

SEC source: 0001209191-18-041089 · doc4.xml · nonDerivative · entry 1

Evans Andrew W · CIK 0001338158 · Executive Vice President & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 65,371

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: Each performance stock unit (PSU) represents the right to receive, at settlement, one share of Southern Company common stock. On July 1, 2018, 21,068 PSUs and 1,832 dividend equivalent units vested.

F2 · shares: Shares will be withheld to satisfy tax withholding obligations once the amount of tax withholding is determined.

F1 · price: Each performance stock unit (PSU) represents the right to receive, at settlement, one share of Southern Company common stock. On July 1, 2018, 21,068 PSUs and 1,832 dividend equivalent units vested.

F2 · balance_after: Shares will be withheld to satisfy tax withholding obligations once the amount of tax withholding is determined.

SEC source: 0001209191-18-039372 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,023.055

Underlying: Southern Company Common Stock · 119.1333 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-036908 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,903.9217

Underlying: Southern Company Common Stock · 126.0974 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-033705 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,777.8243

Underlying: Southern Company Common Stock · 122.5852 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-033623 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 40,920

Underlying: Southern Company Common Stock · 40,920 shares

Expires not disclosed

F1 · security: Restricted stock unit (RSU) award designed to retain critical talent through completion of Plant Vogtle Units 3 and 4 in accordance with the schedule approved by the Georgia Public Service Commission in December 2017. The RSU award will vest 20% each year for five years, on December 31 of each year, beginning December 31, 2018. Vesting will be accelerated if the fuel load authorization for Unit 3 and Unit 4 is received from U.S. Nuclear Regulatory Commission before December 31, 2022. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F1 · derivative.exercise_date: Restricted stock unit (RSU) award designed to retain critical talent through completion of Plant Vogtle Units 3 and 4 in accordance with the schedule approved by the Georgia Public Service Commission in December 2017. The RSU award will vest 20% each year for five years, on December 31 of each year, beginning December 31, 2018. Vesting will be accelerated if the fuel load authorization for Unit 3 and Unit 4 is received from U.S. Nuclear Regulatory Commission before December 31, 2022. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

F1 · derivative.expiration_date: Restricted stock unit (RSU) award designed to retain critical talent through completion of Plant Vogtle Units 3 and 4 in accordance with the schedule approved by the Georgia Public Service Commission in December 2017. The RSU award will vest 20% each year for five years, on December 31 of each year, beginning December 31, 2018. Vesting will be accelerated if the fuel load authorization for Unit 3 and Unit 4 is received from U.S. Nuclear Regulatory Commission before December 31, 2022. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.

SEC source: 0001209191-18-030134 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,655.2391

Underlying: Southern Company Common Stock · 121.4666 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-026905 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,533.7725

Underlying: Southern Company Common Stock · 117.6185 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-19-004969 · doc4a.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,769.0095

Underlying: Southern Company Common Stock · 117.6185 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F3 · balance_after: Amendment filed to correct the number of phantom stock units beneficially owned on April 27, 2018. The 117.6125 phantom stock units acquired were inadvertently deducted from rather than added to the total number beneficially owned.

SEC source: 0001209191-18-025151 · doc4.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,651.391

Underlying: Southern Company Common Stock · 124.2034 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock represents the right to receive one share of Southern Company common stock or the cash value thereof. Includes phantom stock units acquired as if reinvested in the dividend reinvestment plan. There is no exercise or expiration date.

F2 · derivative.exercise_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

F2 · derivative.expiration_date: Shares of phantom stock are payable in cash following termination of Mr. Fanning's employment with The Southern Company. Mr. Fanning may transfer his phantom stock account into an alternative investment account at any time.

SEC source: 0001209191-18-022962 · doc4.xml · derivative · entry 1

WOOD E JENNER III · CIK 0001015221 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,658.5982

Underlying: Southern Company Common Stock · 783.6991 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-022960 · doc4.xml · derivative · entry 1

Thompson Larry D. · CIK 0001267205 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,366.7732

Underlying: Southern Company Common Stock · 1,567.3981 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-022957 · doc4.xml · derivative · entry 1

Specker Steven R. · CIK 0001503916 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,173.1662

Underlying: Southern Company Common Stock · 783.6991 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-022956 · doc4.xml · derivative · entry 1

SMITH WILLIAM G JR · CIK 0000909019 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 83,673.7466

Underlying: Southern Company Common Stock · 1,399.4626 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-022954 · doc4.xml · derivative · entry 1

MONIZ ERNERST J · CIK 0001265177 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,044.9395

Underlying: Southern Company Common Stock · 1,044.9395 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-022949 · doc4.xml · derivative · entry 1

Klein Dale E. · CIK 0001493467 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,031.907

Underlying: Southern Company Common Stock · 783.6991 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-022947 · doc4.xml · derivative · entry 1

JOHNS JOHN D · CIK 0001189571 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,453.4901

Underlying: Southern Company Common Stock · 1,511.4196 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-022942 · doc4.xml · derivative · entry 1

JAMES DONALD M · CIK 0001188417 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 127,323.6533

Underlying: Southern Company Common Stock · 783.6991 shares

Expires not disclosed

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

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

SEC source: 0001209191-18-022937 · doc4.xml · derivative · entry 1

Hood Warren A Jr · CIK 0001297575 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 70,330.3567

Underlying: Southern Company Common Stock · 932.9601 shares

Expires not disclosed

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

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