Southern Co officer to sell 100 shares worth 8,845

SOUTHERN CO (SO) reported that officer Matthew Kim filed a notice of proposed sale of restricted securities under Rule 144.

Rhea-AI Filing Summary

SOUTHERN CO (SO) reported that officer Matthew Kim filed a notice of proposed sale of restricted securities under Rule 144. The notice covers 100 shares of common stock of The Southern Company, with an aggregate market value of 8,845, to be sold through Merrill Lynch on or after September 1, 2026 on the NYSE. The shares relate to a February 27, 2024 performance stock vest, described as a compensatory payment. The notice also lists prior 100‑share sales in each of the past three months.

Key Figures

Shares to be sold: 100 shares of common stock Aggregate market value of proposed sale: 8,845 Proposed sale date: 09/01/2026 +4 more

7 metrics

Shares to be sold 100 shares of common stock Proposed Rule 144 sale by officer Matthew Kim

Aggregate market value of proposed sale 8,845 Value for the 100 shares to be sold under Rule 144

Proposed sale date 09/01/2026 Intended date of Rule 144 sale on the NYSE

Performance stock vest date 02/27/2024 Source of shares described as performance stock vest compensatory payment

Past sale on 06/01/2026 100 shares; 9,116 aggregate value Common stock sale by Matthew Kim in prior 3 months

Past sale on 07/01/2026 100 shares; 9,577 aggregate value Common stock sale by Matthew Kim in prior 3 months

Past sale on 08/03/2026 100 shares; 9,428 aggregate value Common stock sale by Matthew Kim in prior 3 months

Key Terms

Rule 144, aggregate market value, performance stock vest, compensatory payment

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

aggregate market value financial

"COMMON | ... | 100 | 8845 | ..."

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

performance stock vest financial

"COMMON | 02/27/2024 | PERFORMANCE STOCK VEST | THE SOUTHERN COMPANY"

compensatory payment financial

"100 | 02/27/2024 | COMPENSATORY PAYMENT"

FAQ

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

What does Southern Company (SO) disclose in this Form 144 filing?

The filing discloses that officer Matthew Kim intends to sell 100 shares of Southern Company common stock under Rule 144, with an aggregate market value of 8,845, through Merrill Lynch on or after September 1, 2026 on the NYSE.

How many Southern Company (SO) shares are covered by Matthew Kim’s proposed Rule 144 sale?

The proposed Rule 144 sale covers 100 shares of Southern Company common stock, with an aggregate market value reported as 8,845 for this transaction.

What is the source of the Southern Company (SO) shares Matthew Kim plans to sell?

The 100 Southern Company shares relate to a February 27, 2024 performance stock vest, characterized in the filing as a compensatory payment from The Southern Company.

On which exchange will Matthew Kim’s Southern Company (SO) shares be sold?

The filing states that the 100 Southern Company common shares are expected to be sold on the NYSE, with Merrill Lynch listed as the broker handling the transaction.

What Southern Company (SO) share sales has Matthew Kim made in the past 3 months?

Over the past 3 months, Matthew Kim sold 100 shares of Southern Company common stock on June 1, 2026 for 9,116, July 1, 2026 for 9,577, and August 3, 2026 for 9,428 in aggregate market value.

Who is the insider involved in this Southern Company (SO) Form 144 filing?

The insider named in the filing is Matthew Kim, identified as an officer of The Southern Company, who has filed notice to sell 100 shares of common stock under Rule 144.

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

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Available on EDGAR 09/01/2026 - 04:01 PM EDT Accepted by SEC EDGAR 09/01/2026 - 12:00 AM 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	THE SOUTHERN COMPANY
SEC File Number	001-03526
Address of Issuer	30 IVAN ALLEN JR BLVD NW 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 RD NE SUITE 1000 ATLANTA GA 30326	100	8845	1150362966	09/01/2026	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	02/27/2024	PERFORMANCE STOCK VEST	THE SOUTHERN COMPANY			100	02/27/2024	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 BLVD NW ATLANTA GA 30308	COMMON	08/03/2026	100	9428
MATTHEW KIM 30 IVAN ALLEN JR BLVD NW ATLANTA GA 30308	COMMON	07/01/2026	100	9577
MATTHEW KIM 30 IVAN ALLEN JR BLVD NW ATLANTA GA 30308	COMMON	06/01/2026	100	9116

144: Remarks and Signature

Remarks
Date of Notice	09/01/2026
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 KIM
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)