SOUTHERN CO — Director's Dealing 2026

Feb 13, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SOUTHERN CO (SO)
CIK: 0000092122
Period of Report: 2026-02-11

Reporting Person: Greene Kimberly S, (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-11	Southern Company Common Stock	A	51855	—	Acquired	150000	Direct
2026-02-11	Southern Company Common Stock	F	23097	$90.86	Disposed	126903	Direct
2026-02-11	Southern Company Common Stock	M	3350	—	Acquired	130253	Direct
2026-02-11	Southern Company Common Stock	F	1651	$90.86	Disposed	128602	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-11	Performance Restricted Stock Units	$0	M	3240	Disposed		Southern Company Common Stock (3240)	Direct

Footnotes

F1: Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2023-2025 award. The Compensation and Talent Development Committee certified performance on February 11, 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. Includes 110 accrued dividend equivalent units.

F4: 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.