WILLIAM G. SMITH JR - 01 Oct 2025 Form 4 Insider Report for SOUTHERN CO (SO)

Role: Director
Signature: /s/ Brittney Anderson, Attorney-in-Fact for William G. Smith, Jr.
Issuer symbol: SO
Transactions as of: 01 Oct 2025
Net transactions value: +$78,750
Form type: 4
Filing time: 02 Oct 2025, 16:37:47 UTC
Previous filing: 02 Jul 2025
Next filing: 06 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
SMITH WILLIAM G JR	Director	30 IVAN ALLEN JR. BLVD., NW, ATLANTA	/s/ Brittney Anderson, Attorney-in-Fact for William G. Smith, Jr.	02 Oct 2025	0000909019

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	SO	Deferred Stock Units Holding	Award	$78,750	+831	+0.53%	$94.80	156,451	01 Oct 2025	Southern Company Common Stock	831	$0.000000	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.