DAVID J. GRAIN - 01 Jul 2025 Form 4 Insider Report for SOUTHERN CO (SO)

Role: Director
Signature: /s/ J. Patrick Becker, Attorney-in-Fact for David J. Grain
Issuer symbol: SO
Transactions as of: 01 Jul 2025
Net transactions value: +$77,500
Form type: 4
Filing time: 02 Jul 2025, 11:25:03 UTC
Previous filing: 03 Apr 2025
Next filing: 02 Oct 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
GRAIN DAVID J	Director	30 IVAN ALLEN JR. BLVD., NW, ATLANTA	/s/ J. Patrick Becker, Attorney-in-Fact for David J. Grain	02 Jul 2025	0001249303

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	SO	Southern Company Common Stock Holding						500	01 Jul 2025	Direct

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	$77,500	+840	+1.1%	$92.30	80,724	01 Jul 2025	Southern Company Common Stock	840	$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.