Southern Co (SO) director receives quarterly deferred stock unit grant

Rhea-AI Filing Summary

Southern Company director William G. Smith Jr. received a grant of 851.0419 deferred stock units as part of his quarterly cash and equity retainers under the Southern Company 2021 Equity and Incentive Compensation Plan. Each deferred stock unit represents one share of Southern Company common stock and is deferred under the Deferred Compensation Plan for Outside Directors.

The deferred stock units, including amounts acquired through the plan’s dividend reinvestment feature, will be settled in shares of common stock after his service on the Board ends, on dates he previously specified. Following this award, his directly held deferred stock unit balance is 160,806.3288 units.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider SMITH WILLIAM G JR

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Deferred Stock Units Holding	851.042	$96.94	$83K

Holdings After Transaction: Deferred Stock Units Holding — 160,806.329 shares (Direct)

Footnotes (1)

1. Represents quarterly director cash and equity retainers 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. 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. Includes additional deferred stock units acquired through the dividend reinvestment feature of the Deferred Compensation Plan.

Key Figures

Deferred stock units granted: 851.0419 units Price per deferred stock unit: $96.94 per unit Deferred units after transaction: 160,806.3288 units +2 more

5 metrics

Deferred stock units granted 851.0419 units Quarterly director cash and equity retainers on 2026-04-01

Price per deferred stock unit $96.94 per unit Reference price for the 851.0419-unit grant

Deferred units after transaction 160,806.3288 units Total directly held deferred stock units following the award

Underlying common stock 851.0419 shares Each deferred stock unit equals one Southern Company common share

Exercise or expiration date None Deferred stock units have no exercise or expiration date

Key Terms

Deferred stock units, Deferred Compensation Plan for Outside Directors, dividend reinvestment feature, Southern Company 2021 Equity and Incentive Compensation Plan

4 terms

Deferred stock units financial

"Represents quarterly director cash and equity retainers paid ... and deferred pursuant to the Deferred Compensation Plan"

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.

Deferred Compensation Plan for Outside Directors financial

"deferred pursuant to the Deferred Compensation Plan for Outside Directors of The Southern Company"

dividend reinvestment feature financial

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

Southern Company 2021 Equity and Incentive Compensation Plan financial

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

Form 4 Insider Transactions: What Each Field Means →

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^*

SMITH WILLIAM G JR

(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)
04/01/2026

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	04/01/2026		A		851.0419		(2)	(2)	Southern Company Common Stock	851.0419	$96.94	160,806.3288(3)	D

Explanation of Responses:

1. Represents quarterly director cash and equity retainers 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 William G. Smith, Jr.	04/02/2026
	** 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)

FAQ

What did Southern Co (SO) director William G. Smith Jr. report on this Form 4?

He reported receiving 851.0419 deferred stock units as part of his quarterly director cash and equity retainers. These units are granted under Southern Company’s 2021 Equity and Incentive Compensation Plan and deferred into the Deferred Compensation Plan for Outside Directors.

How many deferred stock units does the Southern Co (SO) director hold after this grant?

After this grant, William G. Smith Jr. holds a total of 160,806.3288 deferred stock units directly. This figure includes units from the latest award as well as additional units accumulated previously, including those from the dividend reinvestment feature of the deferred compensation plan.

What does each deferred stock unit for Southern Co (SO) represent?

Each deferred stock unit represents the right to receive one share of Southern Company common stock. The units are bookkeeping entries, not current shares, and are settled in actual Southern Company common stock after the director’s Board service ends, following his elected distribution schedule.

When will the Southern Co (SO) deferred stock units be settled into shares?

The deferred stock units are settled in shares of Southern Company common stock after the director’s service on the Board terminates. Settlement timing follows the dates the reporting person previously specified under the Deferred Compensation Plan for Outside Directors, rather than on a fixed vesting or exercise date.

Is there an exercise or expiration date for the Southern Co (SO) deferred stock units?

There is no exercise or expiration date for these deferred stock units. They are settled in Southern Company common stock on the specified dates after the director’s Board service ends, as outlined in the Deferred Compensation Plan, instead of requiring any exercise action by the director.

How are dividends handled for the Southern Co (SO) deferred stock units?

Additional deferred stock units are acquired through the dividend reinvestment feature of the Deferred Compensation Plan. When Southern Company pays dividends, equivalent value is credited as more deferred stock units, increasing the director’s total deferred balance over time rather than paying cash immediately.