CHRISTOPHER C. WOMACK - 16 Feb 2026 Form 4 Insider Report for SOUTHERN CO (SO)

Role: Chairman, President & CEO
Signature: /s/ Brittney Anderson, Attorney-in-Fact for Christopher C. Womack
Issuer symbol: SO
Transactions as of: 16 Feb 2026
Net transactions value: -$7,881,742
Form type: 4
Filing time: 17 Feb 2026, 15:19:27 UTC
Previous filing: 03 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
WOMACK CHRISTOPHER C	Chairman, President & CEO	30 IVAN ALLEN JR BLVD NW, ATLANTA	/s/ Brittney Anderson, Attorney-in-Fact for Christopher C. Womack	17 Feb 2026	0001195423

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SO	Southern Company Common Stock	Award	$0	+62,223	+61%	$0.000000	164,866	16 Feb 2026	Direct	F1
transaction	SO	Southern Company Common Stock	Tax liability	$2,518,185	-27,715	-17%	$90.86	137,151	16 Feb 2026	Direct	F2
transaction	SO	Southern Company Common Stock	Options Exercise	$0	+13,751	+10%	$0.000000	150,902	16 Feb 2026	Direct	F3
transaction	SO	Southern Company Common Stock	Tax liability	$615,304	-6,772	-4.5%	$90.86	144,130	16 Feb 2026	Direct	F2
transaction	SO	Southern Company Common Stock	Award	$0	+117,327	+81%	$0.000000	261,457	16 Feb 2026	Direct	F4
transaction	SO	Southern Company Common Stock	Tax liability	$4,748,253	-52,259	-20%	$90.86	209,198	16 Feb 2026	Direct	F2
holding	SO	Southern Company Common Stock						2,584	16 Feb 2026	By 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
transaction	SO	Performance Restricted Stock Units	Options Exercise	$0	-13,302	-33%	$0.000000	26,604	16 Feb 2026	Southern Company Common Stock	13,302	$0.000000	Direct	F5

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

Explanation of Responses:

Id	Content
F1	Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2023-2025 award granted on February 1, 2023 . The Compensation and Talent Development Committee certified performance on February 11, 2026 and the Board of Directors ratified such certification on February 16, 2026. Includes accrued dividend equivalent units.
F2	Shares withheld to satisfy required state and federal tax withholding requirements.
F3	Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 5, 2025. The Compensation and Talent Development Committee certified performance on February 11, 2026 and the Board of Directors ratified such certification on February 16, 2026. Includes 449 accrued dividend equivalent units.
F4	Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2023-2025 award granted on May 24, 2023. The Compensation and Talent Development Committee certified performance on February 11, 2026 and the Board of Directors ratified such certification on February 16, 2026. Includes accrued dividend equivalent units.
F5	Represents first 1/3 of performance restricted stock units granted on February 5, 2025. The remaining award will vest 1/3 in 2027 and 1/3 in 2028. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon vesting to satisfy tax requirements.