Dale E. Klein - 02 Jan 2026 Form 4 Insider Report for SOUTHERN CO (SO)

Role: Director
Signature: /s/ Brittney Anderson, Attorney-in-Fact for Dale E. Klein
Issuer symbol: SO
Transactions as of: 02 Jan 2026
Net transactions value: +$45,000
Form type: 4
Filing time: 06 Jan 2026, 11:39:47 UTC
Previous filing: 02 Oct 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Klein Dale E.	Director	30 IVAN ALLEN JR. BLVD., NW, ATLANTA	/s/ Brittney Anderson, Attorney-in-Fact for Dale E. Klein	06 Jan 2026	0001493467

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	$45,000	+516	+0.92%	$87.20	56,460	02 Jan 2026	Southern Company Common Stock	516	$0.000000	Direct	F1, F2, F3

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

Explanation of Responses:

Id	Content
F1	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.
F2	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.
F3	Includes additional deferred stock units acquired through the dividend reinvestment feature of the Deferred Compensation Plan.