Southern Co. insider plans small stock sale

Southern Co. affiliate filed a Form 144 disclosing a proposed sale of 100 shares of Common Stock to be sold on the NYSE.

Rhea-AI Filing Summary

Southern Co. affiliate filed a Form 144 disclosing a proposed sale of 100 shares of Common Stock to be sold on the NYSE. The filing notes the securities arose from a Performance Stock Unit vest dated 02/07/2024 and is labeled a Compensatory Payment. The filer also reported sales of 5,123 shares on 02/24/2026 for $487,453.45.

Key Figures

Planned resale: 100 shares Recent sales reported: 5,123 shares Proceeds from recent sale: $487,453.45 +1 more

4 metrics

Planned resale 100 shares Security from PSU vest dated 02/07/2024

Recent sales reported 5,123 shares Sale recorded 02/24/2026

Proceeds from recent sale $487,453.45 Proceeds tied to 02/24/2026 sale of 5,123 shares

Exchange NYSE Market where resale is to occur (listed on notice)

Key Terms

Form 144, Performance Stock Unit, Compensatory Payment

3 terms

Form 144 regulatory

"filed a Form 144 disclosing a proposed sale"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Performance Stock Unit financial

"Performance Stock Unit Vest dated 02/07/2024"

A performance stock unit is a type of reward companies give to employees, usually managers, that depends on how well the company performs over time. If the company hits specific goals, the employee earns shares of stock, like earning a prize for reaching certain levels in a game. It motivates employees to work hard because their rewards are tied to the company's success.

Compensatory Payment financial

"listed as Compensatory Payment in the securities description"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does Southern Co. (SO) Form 144 disclose about the planned sale?

It discloses an affiliate intends to sell 100 shares of Common Stock on the NYSE, arising from a 02/07/2024 Performance Stock Unit vest as a Compensatory Payment. The filing identifies the transaction method as a resale notice.

Who is the reporting person on the Form 144 for SO and what recent sales are listed?

The Form 144 lists a filer with an Atlanta address and names Matthew Kim in the sales history. It reports prior sales of 5,123 shares on 02/24/2026 for $487,453.45, recorded in the notice.

Are the 100 shares being sold part of compensation at Southern Co. (SO)?

Yes. The notice labels the securities as issued from a Performance Stock Unit vest dated 02/07/2024 and describes the transfer as a Compensatory Payment, indicating the shares originated from compensation.

Does the Form 144 indicate how the proposed sale proceeds will be used for SO?

No. The filing identifies the sale as a resale notice for an affiliate on the NYSE but does not state any use of proceeds or indicate the company will receive proceeds; it is a holder resale disclosure.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/01/2026 - 04:01 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002082705
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Southern Company
SEC File Number	001-03526
Address of Issuer	30 Ivan Allen Jr. Boulevard, N.W. Atlanta GEORGIA 30308
Phone	404-506-5000
Name of Person for Whose Account the Securities are To Be Sold	Matthew Kim
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Merrill Lynch 3455 Peachtree Road NE Ste 1000 Atlanta GA 30326	100	9657	1127301098	05/01/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	02/07/2024	Performance Stock Unit Vest	Southern Co.			100	02/07/2024	Compensatory Payment

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Matthew Kim 30 Ivan Allen Jr. Boulevard, N.W. Atlanta GA 30308	Common	02/24/2026	5123	487453.45

144: Remarks and Signature

Remarks
Date of Notice	05/01/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	11/25/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Matthew M. Kim
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)