Pedro P. Cherry - 04 Aug 2025 Form 3 Insider Report for SOUTHERN CO (SO)

Role: Chairman, President & CEO, MPC
Signature: /s/ Brittney Anderson, Attorney-in-Fact for Pedro P. Cherry
Issuer symbol: SO
Transactions as of: 04 Aug 2025
Net transactions value: $0
Form type: 3
Filing time: 06 Jan 2026, 11:53:19 UTC
Previous filing: 14 May 2025
Next filing: 12 Aug 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Cherry Pedro P.	Chairman, President & CEO, MPC	30 IVAN ALLEN JR. BLVD., NW, ATLANTA	/s/ Brittney Anderson, Attorney-in-Fact for Pedro P. Cherry	06 Jan 2026	0001697382

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	SO	Southern Company Common Stock						15,095	04 Aug 2025	401(k)

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
holding	SO	Southern Co Restricted Stock Units							04 Aug 2025	Southern Company Common Stock	1,592	$0.000000	Direct	F1
holding	SO	Southern Co Restricted Stock Units							04 Aug 2025	Southern Company Common Stock	1,391	$0.000000	Direct	F2
holding	SO	Southern Co Restricted Stock Units							04 Aug 2025	Southern Company Common Stock	672	$0.000000	Direct	F3

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

Explanation of Responses:

Id	Content
F1	Represents Restricted Stock Units granted on February 5, 2025. The award will vest 1/3 per year on the first, second and third anniversaries of grant date. Each restricted stock unit represents the right to receive, at settlement, one share of common stock.
F2	Represents Restricted Stock Units granted on January 31, 2024. The award vested 1/3 on the first anniversary of the grant date. The remaining award will vest 1/3 in 2026 and 1/3 in 2027. Each restricted stock unit represents the right to receive, at settlement, one share of common stock.
F3	Represents Restricted Stock Units granted on February 1, 2023. The award vested 1/3 on each of the first and second anniversaries of the grant date. The remaining award will vest in 2026. Each restricted stock unit represents the right to receive, at settlement, one share of common stock.