Southern Company (SO) director David J. Grain boosts deferred stock unit holdings

Rhea-AI Filing Summary

Southern Company director David J. Grain received additional deferred stock units as part of his quarterly director equity retainer. On 01/02/2026, he acquired 931.7661 deferred stock units under the Southern Company 2021 Equity and Incentive Compensation Plan, with the award deferred pursuant to the Deferred Compensation Plan for Outside Directors of The Southern Company.

Each deferred stock unit represents the right to receive one share of Southern Company common stock, and the units are settled in shares after Grain’s service on the Board ends, as specified by him under the plan. Following this transaction, he beneficially owns 83,842.2409 deferred stock units, which also reflect additional units credited through the plan’s dividend reinvestment feature.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider GRAIN DAVID J

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Deferred Stock Units Holding	931.766	$87.20	$81K

Holdings After Transaction: Deferred Stock Units Holding — 83,842.241 shares (Direct)

Footnotes (1)

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. 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.

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^*

GRAIN DAVID J

(Last) (First) (Middle)

30 IVAN ALLEN JR. BLVD., NW

(Street)

ATLANTA GA 30308

(City) (State) (Zip)

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)

3. Date of Earliest Transaction (Month/Day/Year)
01/02/2026

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

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

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

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	01/02/2026		A		931.7661		(2)	(2)	Southern Company Common Stock	931.7661	$87.2	83,842.2409(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 David J. Grain	01/06/2026
	** 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.

FAQ

What insider transaction did Southern Company (SO) report for David J. Grain?

Southern Company reported that director David J. Grain acquired 931.7661 deferred stock units on 01/02/2026 as part of his quarterly director equity retainer, deferred under the company’s established compensation plans.

How many Southern Company (SO) deferred stock units does David J. Grain now hold?

After the reported transaction, David J. Grain beneficially owns 83,842.2409 deferred stock units, including units credited through the dividend reinvestment feature of the Deferred Compensation Plan.

What does each deferred stock unit of Southern Company (SO) represent for the director?

Each deferred stock unit represents the right to receive one share of Southern Company common stock, to be delivered under the terms of the Deferred Compensation Plan for Outside Directors.

When will David J. Grain’s Southern Company (SO) deferred stock units be settled?

The deferred stock units are settled in shares of Southern Company common stock on date(s) following the termination of Grain’s service on the Board, as he has specified under the Deferred Compensation Plan.

Do Southern Company (SO) deferred stock units for directors have an exercise or expiration date?

According to the disclosure, the deferred stock units have no exercise or expiration date. They are settled in shares after the director’s Board service ends, rather than being exercised like traditional options.

How are additional Southern Company (SO) deferred stock units credited to David J. Grain?

The total holdings of 83,842.2409 deferred stock units include additional units acquired through the dividend reinvestment feature of the Deferred Compensation Plan, which credits units instead of cash dividends.