SOUTHERN CO — Director's Dealing 2026

Feb 3, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SOUTHERN CO (SO)
CIK: 0000092122
Period of Report: 2026-02-03

Reporting Person: Sena Peter P III (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-01-31	Southern Company Common Stock	M	1754	—	Acquired	16753	Direct
2026-01-31	Southern Company Common Stock	F	840	$89.31	Disposed	15913	Direct
2026-02-01	Southern Company Common Stock	M	1756	—	Acquired	17669	Direct
2026-02-01	Southern Company Common Stock	F	780	$89.31	Disposed	16889	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-01	Southern Co Restricted Stock Units	$0	M	1573	Disposed		Southern Company Common Stock (1573)	Direct
2026-01-31	Southern Co Restricted Stock Units	$0	M	1636	Disposed		Southern Company Common Stock (1636)	Direct

Footnotes

F1: Shares acquired upon vesting of second 1/3 of restricted stock units granted on January 31, 2024. Includes 118 accrued dividend equivalent units.

F2: Shares withheld to satisfy required state and federal tax withholding requirements.

F3: Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 1, 2023. Includes 183 accrued dividend equivalent units.

F4: Represents final 1/3 of performance restricted stock units granted on February 1, 2023. 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.

F5: Represents second 1/3 of restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. 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.