[Form 4] The Southern Company Insider Trading Activity

Rhea-AI Filing Summary

Sterling A. Spainhour Jr., identified as an officer (EVP & CLO) of Southern Company (SO), sold 2,380 shares of Southern Company common stock on 08/11/2025 at $95.02 per share. After the reported sale he directly beneficially owns 17,382 shares and also holds 6,797.1236 shares indirectly through a 401(k). No derivative transactions were reported on this Form 4.

The filing was submitted via attorney-in-fact; the disclosure shows a routine officer sale and continued direct and indirect ownership positions.

Insights

Securities Analyst

TL;DR: Routine officer sale; holdings remain materially intact with both direct and 401(k) positions.

The report documents a sale of 2,380 shares at $95.02 each, leaving 17,382 shares held directly and 6,797.1236 shares held indirectly in a 401(k). No options or other derivatives are disclosed. This appears to be a standard disclosure of an executive sale rather than a company-specific corporate action.

Corporate Governance Expert

TL;DR: Disclosure is complete for a single insider sale; no governance red flags are evident from the filing.

The filer is named as an officer (EVP & CLO) and the transaction is recorded as a sale (code S). The Form 4 shows both direct and indirect ownership and includes a 401(k) reporting line. The form is signed via attorney-in-fact, which is an acceptable procedural practice for filing signatures.

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

X

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^*

Spainhour Sterling A Jr.

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
08/11/2025

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
Southern Company Common Stock	08/11/2025		S		2,380	D	$95.02	17,382	D
Southern Company Common Stock								6,797.1236	I	401(k)

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

Explanation of Responses:

	/s/ Brittney Anderson, Attorney-in-Fact for Sterling A. Spainhour	08/12/2025
	** 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 transaction did the Southern Company insider (SO) report?

The filing reports that Sterling A. Spainhour Jr. sold 2,380 shares of Southern Company common stock on 08/11/2025 at $95.02 per share.

How many Southern Company shares does the reporting person own after the sale?

After the reported transaction the reporting person directly beneficially owns 17,382 shares.

Does the Form 4 show any indirect holdings for the reporting person?

Yes. The filing discloses indirect ownership of 6,797.1236 shares through a 401(k) plan.

Were any derivative securities (options, warrants, etc.) reported on this Form 4?

No. Table II for derivative securities contains no entries; only non-derivative common stock transactions are reported.

Who signed the Form 4 filing for the reporting person?

The Form 4 shows it was signed by Brittney Anderson, Attorney-in-Fact for Sterling A. Spainhour.