David J. Grain - Oct 1, 2025 Form 4 Insider Report for SOUTHERN CO (SO)

Role
Director
Signature
/s/ Brittney Anderson, Attorney-in-Fact for David J. Grain
Stock symbol
SO
Transactions as of
Oct 1, 2025
Transactions value $
$77,500
Form type
4
Date filed
10/2/2025, 04:00 PM
Previous filing
Oct 2, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
GRAIN DAVID J Director 30 IVAN ALLEN JR. BLVD., NW, ATLANTA /s/ Brittney Anderson, Attorney-in-Fact for David J. Grain 2025-10-02 0001249303

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 Deferred Stock Units Holding Award $77.5K +818 +1% $94.80 82.2K Oct 1, 2025 Southern Company Common Stock 818 $0.00 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Acquired pursuant to Southern's Deferred Compensation Plan, payable in stock only upon termination. There is no exercise or expiration date.