Southern Company (NYSE: SO) affiliate files Form 144 to sell 100 shares

Rhea-AI Filing Summary

The Southern Company (SO) reporting a proposed sale of 100 shares of Common Stock under a Form 144 notice tied to a performance stock vest dated 02/07/2024, described as a compensatory payment. The filing lists two prior reported dispositions by Matthew Kim: 100 shares on 05/01/2026 and 100 shares on 06/01/2026.

This filing is a notice of intent to sell by an affiliate under Form 144 and records recent small dispositions; it does not state proceeds, price, or whether sales were executed on exchange or privately.

Insights

Corporate Securities Counsel

Routine Form 144 notice for a small compensatory vesting and affiliated sale.

The filing lists a planned sale of 100 shares tied to a performance stock vest dated 02/07/2024 and records two prior dispositions of 100 shares each on 05/01/2026 and 06/01/2026. Form 144 is a regulatory notice required before public resale by affiliates.

Transaction timing, sale price, and cash‑flow recipient details are not stated. Subsequent SEC filings or broker reports would show execution details and whether Rule 144 resale conditions were met.

Key Figures

Planned sale: 100 shares Disposition (reported): 100 shares Disposition (reported): 100 shares

3 metrics

Planned sale 100 shares performance stock vest dated <date>02/07/2024</date>

Disposition (reported) 100 shares reported sale by Matthew Kim on <date>05/01/2026</date>

Disposition (reported) 100 shares reported sale by Matthew Kim on <date>06/01/2026</date>

Key Terms

Form 144, performance stock vest, compensatory payment

3 terms

Form 144 regulatory

"Securities To Be Sold section showing planned resale notice"

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 vest financial

"line: PERFORMANCE STOCK VEST dated 02/07/2024"

compensatory payment financial

"line: 02/07/2024 ... COMPENSATORY PAYMENT"

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Available on EDGAR 07/01/2026 - 04:08 PM Accepted by SEC EDGAR 07/01/2026 - 04:07 PM 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
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	9577	1127301098	07/01/2026	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 VEST	THE SOUTHERN COMPANY			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 BLVD NW ATLANTA GA 30308	COMMON	05/01/2026	100	9657
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

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does Southern Company (SO) Form 144 report?

Form 144 reports a proposed public resale by an affiliate. This filing lists a planned sale of 100 shares tied to a performance stock vest dated 02/07/2024 and notes two prior dispositions of 100 shares each in 05/01/2026 and 06/01/2026.

Who is the reporting person on the filing for SO?

The filing identifies Matthew Kim as the individual associated with recent dispositions. The record shows Matthew Kim reported sales of 100 shares on 05/01/2026 and 100 shares on 06/01/2026 in the provided excerpt.

Does the Form 144 disclose sale proceeds or price for SO shares?

No—this excerpt does not state sale price or proceeds. The filing lists share counts and dates but does not include execution price, proceeds, or whether sales occurred on the exchange or were privately negotiated.

What is the nature of the securities being sold according to the filing?

The securities are Common Stock from a performance stock vest described as a compensatory payment dated 02/07/2024. The record shows planned sale of 100 shares associated with that vesting event.