STOCK TITAN

Southern Co (NYSE: SO) EVP sells 6,669 shares in open-market trade

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Southern Company executive vice president Christopher Cummiskey sold 6,669 shares of Southern Company Common Stock in an open-market transaction at $96.55 per share. After the sale, he directly holds 30,800.4417 shares and indirectly holds 5,857.0111 shares through a 401(k) account.

Positive

  • None.

Negative

  • None.

Insights

EVP completes open-market sale while retaining a substantial remaining stake.

Executive vice president Christopher Cummiskey executed an open-market sale of 6,669 shares of Southern Company common stock at $96.55 per share. The filing characterizes this as a standard sale in the open market or a private transaction.

Following the sale, he still directly owns 30,800.4417 shares and indirectly holds 5,857.0111 shares via a 401(k). With no derivative positions reported and a sizable continuing stake, the transaction appears routine rather than a full exit, though it modestly reduces his equity exposure.

SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Cummiskey Christopher

(Last)(First)(Middle)
30 IVAN ALLEN JR BLVD NW

(Street)
ATLANTA GEORGIA 30308

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
SOUTHERN CO [ SO ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
EVP
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
03/19/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Southern Company Common Stock03/19/2026S6,669D$96.5530,800.4417D
Southern Company Common Stock5,857.0111I401(k)
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
/s/ Brittney Anderson, Attorney-in-Fact for Christopher Cummiskey03/19/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Southern Co (SO) EVP Christopher Cummiskey report?

Christopher Cummiskey reported an open-market sale of 6,669 Southern Company shares. The shares of common stock were sold at a price of $96.55 per share on March 19, 2026, according to the Form 4 insider filing.

At what price did Southern Co (SO) EVP sell his shares?

The EVP sold 6,669 Southern Company shares at $96.55 per share. This price applies to the reported open-market transaction on March 19, 2026, as disclosed in the Form 4 filing for Southern Company common stock.

How many Southern Co (SO) shares does the EVP still own after the sale?

After the sale, the EVP directly owns 30,800.4417 Southern Company shares. He also indirectly holds 5,857.0111 additional shares through a 401(k) account, giving him a continuing equity stake in the company following the reported open-market transaction.

Was the Southern Co (SO) EVP’s transaction a buy or sell activity?

The reported insider activity was a sell transaction. The Form 4 identifies the code as an open-market sale of 6,669 shares of Southern Company common stock, with no corresponding purchases or derivative exercises disclosed for this date.

Does the Southern Co (SO) EVP hold any indirect shares after the reported sale?

Yes, the EVP continues to hold indirect shares via a 401(k) plan. Following the transaction, the filing shows 5,857.0111 Southern Company common shares held indirectly, in addition to his directly owned 30,800.4417 shares.
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