Sloane N. Drake - 08 Mar 2026 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 2026
Net transactions value
$0
Form type
4
Filing time
10 Mar 2026, 15:33:13 UTC
Previous filing
13 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Drake Sloane N EVP & CHRO 30 IVAN ALLEN JR BLVD NW, ATLANTA /s/ Brittney Anderson, Attorney-in-Fact for Sloane N. Drake 10 Mar 2026 0001971188

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SO Southern Company Common Stock Options Exercise +1,420 +3.7% $0.000000* 39,565 08 Mar 2026 Direct F1
transaction SO Southern Company Common Stock Tax liability -633 -1.6% $97.48* 38,932 08 Mar 2026 Direct F2
holding SO Southern Company Common Stock 2,621 08 Mar 2026 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 -1,275 -100% $0.000000* 0 08 Mar 2026 Southern Company Common Stock 1,275 $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 the final 1/3 of performance restricted stock units granted on March 8, 2023. Includes 145 accrued dividend equivalent units.
F2 Shares withheld to satisfy required state and federal tax withholding requirements.
F3 Represents the final 1/3 of performance restricted stock units granted on March 8, 2023. Each restricted stock unit represents the right to receive, at settlement, one share of common stock.