Peter P. Sena III - 03 Feb 2026 Form 4 Insider Report for SOUTHERN CO (SO)

Role
Chairman,President & CEO, SNC
Signature
/s/ Brittney Anderson, Attorney-in-Fact for Peter P. Sena, III
Issuer symbol
SO
Transactions as of
03 Feb 2026
Net transactions value
-$144,682
Form type
4
Filing time
03 Feb 2026, 18:19:07 UTC
Previous filing
18 Feb 2025
Next filing
13 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Sena Peter P III Chairman,President & CEO, SNC 30 IVAN ALLEN JR. BLVD NW, BIN SC 803, ATLANTA /s/ Brittney Anderson, Attorney-in-Fact for Peter P. Sena, III 03 Feb 2026 0002023851

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SO Southern Company Common Stock Options Exercise $0 +1,754 +12% $0.000000 16,753 31 Jan 2026 Direct F1
transaction SO Southern Company Common Stock Tax liability $75,020 -840 -5% $89.31 15,913 31 Jan 2026 Direct F2
transaction SO Southern Company Common Stock Options Exercise $0 +1,756 +11% $0.000000 17,669 01 Feb 2026 Direct F3
transaction SO Southern Company Common Stock Tax liability $69,662 -780 -4.4% $89.31 16,889 01 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 Southern Co Restricted Stock Units Options Exercise $0 -1,573 -100% $0.000000 0 01 Feb 2026 Southern Company Common Stock 1,573 $0.000000 Direct F4
transaction SO Southern Co Restricted Stock Units Options Exercise $0 -1,636 -50% $0.000000 1,636 31 Jan 2026 Southern Company Common Stock 1,636 $0.000000 Direct F5
* 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 restricted stock units granted on January 31, 2024. Includes 118 accrued dividend equivalent units.
F2 Shares withheld to satisfy required state and federal tax withholding requirements.
F3 Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 1, 2023. Includes 183 accrued dividend equivalent units.
F4 Represents final 1/3 of performance restricted stock units granted on February 1, 2023. 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.
F5 Represents second 1/3 of restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. 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.