[Form 4] SOUTHERN CO Insider Trading Activity

Rhea-AI Filing Summary

James O. Etheredge, a director of Southern Company (SO), acquired 448.3122 deferred stock units on 10/01/2025 under the company's Deferred Compensation Plan. The units are payable in Southern Company common stock only upon termination and have no exercise or expiration date. The filing reports a per-share amount/value of $94.8 associated with the deferred stock units. After this acquisition, Etheredge beneficially owns 1,383.0641 shares (directly).

Positive

• Director acquired 448.3122 deferred stock units, aligning compensation with shareholder equity
• Post-transaction beneficial ownership of 1,383.0641 shares provides continued insider stake

Negative

• None.

Insights

Corporate Governance Expert

Director acquired deferred stock units, signaling continued alignment with shareholders.

The report shows a director-level participant in the Deferred Compensation Plan receiving 448.3122 deferred stock units, payable only in stock upon termination. That mechanism ties long-term compensation to equity value without immediate share issuance or exercise mechanics. The absence of an exercise or expiration date means these units are retention-oriented and convert to stock at termination rather than functioning as time-limited options.

Filing explicitly discloses the transaction date of 10/01/2025 and the post-transaction beneficial ownership of 1,383.0641 shares.

Equity Disclosure Analyst

Insider acquisition size and reported value are clearly stated; transaction is routine compensation, not a market purchase.

The Form 4 records acquisition code "A" for 448.3122 deferred stock units with an associated amount/value of $94.8. Because units are deferred compensation payable in stock, this is not an open-market buy that increases immediately tradable float. The signature and filing date (signed by attorney-in-fact 10/02/2025) confirm timely disclosure under Section 16 reporting rules.

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).

1. Name and Address of Reporting Person^*

Etheredge James O

(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)
10/01/2025

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	10/01/2025		A		448.3122		(1)	(1)	Southern Company Common Stock	448.3122	$94.8	1,383.0641	D

Explanation of Responses:

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

	/s/ Brittney Anderson, Attorney-in-Fact for James O. Etheredge	10/02/2025
	** 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 did James O. Etheredge report on the Form 4 for Southern Company (SO)?

The Form 4 reports that James O. Etheredge, a director, acquired 448.3122 deferred stock units on 10/01/2025 under Southern's Deferred Compensation Plan.

How are the deferred stock units payable according to the filing?

The units are payable in Southern Company common stock only upon termination and have no exercise or expiration date.

What is the reported value/amount associated with the deferred units?

The filing shows an associated amount/value of $94.8 for the deferred stock units.

How many Southern Company shares does Etheredge beneficially own after this transaction?

After the reported transaction, Etheredge beneficially owns 1,383.0641 shares.

When was the Form 4 signed and who signed it?

The Form 4 was signed on 10/02/2025 by Brittney Anderson, Attorney-in-Fact for James O. Etheredge.