David P. Poroch - 11 Feb 2026 Form 4 Insider Report for SOUTHERN CO (SO)

Role
EVP & CFO
Signature
/s/ Brittney Anderson, Attorney-in-Fact for David P. Poroch
Issuer symbol
SO
Transactions as of
11 Feb 2026
Net transactions value
-$290,298
Form type
4
Filing time
13 Feb 2026, 15:51:53 UTC
Previous filing
09 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Poroch David P. EVP & CFO 30 IVAN ALLEN JR BLVD NW, ATLANTA /s/ Brittney Anderson, Attorney-in-Fact for David P. Poroch 13 Feb 2026 0001616250

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SO Southern Company Common Stock Award $0 +9,454 +23% $0.000000 50,783 11 Feb 2026 Direct F1
transaction SO Southern Company Common Stock Tax liability $264,766 -2,914 -5.7% $90.86 47,869 11 Feb 2026 Direct F2
transaction SO Southern Company Common Stock Options Exercise $0 +568 +1.2% $0.000000 48,437 11 Feb 2026 Direct F3
transaction SO Southern Company Common Stock Tax liability $25,532 -281 -0.58% $90.86 48,156 11 Feb 2026 Direct F2

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 Options Exercise $0 -558 -33% $0.000000 1,114 11 Feb 2026 Southern Company Common Stock 558 $0.000000 Direct F4
* 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 performance share units under Company's Performance Share Program for the 2023-2025 award. The Compensation and Talent Development Committee certified performance on February 11, 2026. Includes accrued dividend equivalent units.
F2 Shares withheld to satisfy required state and federal tax withholding requirements.
F3 Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on August 1, 2025. The Compensation and Talent Development Committee certified performance on February 11, 2026. Includes 10 accrued dividend equivalent units.
F4 Represents first 1/3 of performance restricted stock units granted on August 1, 2025. The remaining award will vest 1/3 in 2027 and 1/3 in 2028. 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.