SOUTHERN CO (SO) · Proposed Sale (Form 144) SEC Filing

Insider Proposed Sale Notice

STERLING SPAINHOUR

OFFICER·SOUTHERN CO (SO)

Proposed

COMMONNEW YORK

Shares3.33K

Est. DateAug 6

Market Value$313.4K

BrokerMERRILL LYNCH

AcquisitionPERFORMANCE STOCK VEST · THE SOUTHERN COMPANY

Acquired DateFeb 11, 2026

Amount Acquired3.33K

10b5-1 Plan Adoption11/25/2025

% Outstanding0.0003%

10b5-1

Exercise / Payment Details

Paid: Feb 11, 2026Method: COMPENSATORY PAYMENT

No sales in the past 3 months

Signature & Compliance expand_more

Notice DateAug 6, 2026

10b5-1 Plan Adoption11/25/2025

Signature STERLING SPAINHOUR

Issuer Info expand_more

CompanySOUTHERN COMPANY

CIK0000092122

SEC File No.001-03526

Phone4045065000

Address30 IVAN ALLEN BLVD NW, ATLANTA, GA 30308