Southern Company director receives 539-unit stock grant

The deferred units are settled in Southern Company common shares on dates after Cooper’s Board service ends, as she specifies under the plan.

Rhea-AI Filing Summary

Southern Company director Shantella E. Cooper acquired 539 deferred stock units on October 1, 2026, as quarterly director equity retainer paid under the Southern Company 2021 Equity and Incentive Compensation Plan and deferred under the Deferred Compensation Plan for Outside Directors. Each unit represents the right to receive one common share. Her reported position after the transaction was 33,424 deferred stock units, including additional units acquired through dividend reinvestment; the reported per-share price was $83.4700.

Insider Trade Summary

Grant/Award: 539.1159 shares

Grant/Award 1 txn

Insider Cooper Shantella E.

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Deferred Stock Units Holding F1, F2, F3	539.1159	$83.47	$45K

Holdings After Transaction: Deferred Stock Units Holding — 33,423.5289 contracts (Direct)

Footnotes (3)

1. F1. Represents quarterly director equity retainer paid under the Southern Company 2021 Equity and Incentive Compensation Plan and deferred pursuant to the Deferred Compensation Plan for Outside Directors of The Southern Company (Deferred Compensation Plan). Each deferred stock unit represents the right to receive one share of Southern Company common stock.
2. F2. Deferred stock units are settled in shares of Southern Company common stock on the date(s) following the termination of the reporting person's service on the Board as specified by the reporting person pursuant to the Deferred Compensation Plan. There is no exercise or expiration date.
3. F3. Includes additional deferred stock units acquired through the dividend reinvestment feature of the Deferred Compensation Plan.

Key Figures

Deferred stock units acquired: 539 units Reported per-share price: $83.4700 per share Deferred stock units after transaction: 33,424 units +1 more

4 metrics

Deferred stock units acquired 539 units October 1, 2026; quarterly director equity retainer

Reported per-share price $83.4700 per share Deferred stock unit acquisition

Deferred stock units after transaction 33,424 units Includes additional units acquired through the dividend reinvestment feature

Common shares per deferred stock unit 1 common share per unit Each unit represents the right to receive one common share

Key Terms

Deferred stock units, Equity and Incentive Compensation Plan, Deferred Compensation Plan, dividend reinvestment feature

4 terms

Deferred stock units financial

"settled in shares of Southern Company common stock"

Deferred stock units are promises from a company to give an employee shares of stock at a future date, often after certain conditions are met or after leaving the company. They function like a form of delayed compensation, allowing employees to earn shares over time. For investors, they represent potential future ownership in the company, but do not provide immediate voting rights or dividends until the shares are actually received.

Equity and Incentive Compensation Plan financial

"paid under the Southern Company 2021 Equity and Incentive Compensation Plan"

Deferred Compensation Plan financial

"deferred pursuant to the Deferred Compensation Plan for Outside Directors"

A deferred compensation plan is an arrangement where an employer agrees to pay part of an employee’s pay or bonus at a later date instead of immediately, often to reduce current tax bills or to tie rewards to long-term performance. For investors it matters because these promises create future cash obligations and influence executive incentives and retention; they can affect a company’s reported liabilities, cash flow planning and the risk profile if the business faces financial trouble.

dividend reinvestment feature financial

"additional deferred stock units acquired through the dividend reinvestment feature"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many deferred stock units did the Southern Company (SO) director acquire?

Shantella E. Cooper, a Southern Company director, acquired 539 deferred stock units on October 1, 2026. The transaction lists a per-share price of $83.4700; the units represent quarterly director equity retainer deferred under the company's plans.

When are Southern Company (SO) deferred stock units settled?

The units are settled in Southern Company common shares on date(s) following the reporting person's termination of Board service, as specified by the reporting person under the Deferred Compensation Plan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/05/2026 - 02:16 PM Accepted by SEC EDGAR 10/05/2026 - 02:16 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Cooper Shantella E.

(Last) (First) (Middle)

30 IVAN ALLEN JR. BLVD., NW

(Street)

ATLANTA GEORGIA 30308

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
SOUTHERN CO [ SO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Deferred Stock Units Holding(1)	$0	10/01/2026		A		539.1159		(2)	(2)	Southern Company Common Stock	539.1159	$83.47	33,423.5289(3)	D

Explanation of Responses:

1. Represents quarterly director equity retainer paid under the Southern Company 2021 Equity and Incentive Compensation Plan and deferred pursuant to the Deferred Compensation Plan for Outside Directors of The Southern Company (Deferred Compensation Plan). Each deferred stock unit represents the right to receive one share of Southern Company common stock.

2. Deferred stock units are settled in shares of Southern Company common stock on the date(s) following the termination of the reporting person's service on the Board as specified by the reporting person pursuant to the Deferred Compensation Plan. There is no exercise or expiration date.

3. Includes additional deferred stock units acquired through the dividend reinvestment feature of the Deferred Compensation Plan.

	/s/ Brittney Anderson, Attorney-in-Fact for Shantella E. Cooper	10/05/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)