Sloane N. Drake - 08 Mar 2025 Form 4 Insider Report for SOUTHERN CO (SO)

Role: EVP & CHRO
Signature: /s/ Brittney Anderson, Attorney-in-Fact for Sloane N. Drake
Issuer symbol: SO
Transactions as of: 08 Mar 2025
Net transactions value: -$56,028
Form type: 4
Filing time: 10 Mar 2025, 16:30:03 UTC
Previous filing: 18 Feb 2025
Next filing: 03 Feb 2026
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SO	Southern Company Common Stock	Options Exercise	$0	+1,372	+5.8%	$0.000000	25,070	08 Mar 2025	Direct	F1
transaction	SO	Southern Company Common Stock	Tax liability	$56,028	-613	-2.4%	$91.40	24,457	08 Mar 2025	Direct	F2
holding	SO	Southern Company Common Stock						2,277	08 Mar 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
transaction	SO	Performance Restricted Stock Units Holding	Options Exercise	$0	-1,274	-50%	$0.000000	1,275	08 Mar 2025	Southern Company Common Stock	1,274	$0.000000	Direct	F3

* 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 second 1/3 of performance restricted stock units granted on March 8, 2023. Includes 98 accrued dividend equivalent units.
F2	Shares withheld to satisfy required state and federal tax withholding requirements.
F3	Represents second 1/3 of performance restricted stock units granted on March 8, 2023. The remaining award will vest in 2026. 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.