Southern Co officer plans sale of 4,266 shares

SOUTHERN CO (SO) received a Form 144 notice indicating that officer Peter P. Sena III plans a proposed sale of up to 4,266 shares of Southern common stock through Merrill Lynch on September 3, 2026 on the NYSE.

Rhea-AI Filing Summary

SOUTHERN CO (SO) received a Form 144 notice indicating that officer Peter P. Sena III plans a proposed sale of up to 4,266 shares of Southern common stock through Merrill Lynch on September 3, 2026 on the NYSE. The shares relate to restricted stock units that vested on December 15, 2024 as compensatory payments.

Key Figures

Shares proposed for sale: 4,266 shares Aggregate market value: $377,924.94 First RSU vesting tranche: 3,953 shares +3 more

6 metrics

Shares proposed for sale 4,266 shares Common stock covered by the Form 144 notice

Aggregate market value $377,924.94 Reported value of the 4,266 common shares in the Form 144

First RSU vesting tranche 3,953 shares Restricted stock unit vest on December 15, 2024, compensatory payment

Second RSU vesting tranche 313 shares Restricted stock unit vest on December 15, 2024, compensatory payment

RSU vesting date December 15, 2024 Date the restricted stock units related to these shares vested

Proposed sale date September 3, 2026 Date of sale listed for the 4,266 shares

Key Terms

Rule 144, restricted stock unit, Compensatory Payment

3 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.

restricted stock unit financial

"Common | 12/15/2024 | RESTRICTED STOCK UNIT VEST | THE SOUTHERN COMPANY"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

Compensatory Payment financial

"3953 | 12/15/2024 | Compensatory Payment"

FAQ

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

What does the Form 144 filing mean for SOUTHERN CO (SO)?

An officer, Peter P. Sena III, filed a Form 144 covering a proposed sale of 4,266 common shares of SOUTHERN CO under Rule 144. It is a notice of intent to sell restricted or control securities, not a confirmation that the sale has already occurred.

How many SOUTHERN CO (SO) shares are covered by this Form 144?

The Form 144 covers a proposed sale of 4,266 shares of SOUTHERN CO common stock. This total corresponds to restricted stock units that vested as compensatory payments and are now eligible for sale under Rule 144, subject to applicable conditions.

Who is selling shares under this Form 144 for SOUTHERN CO (SO)?

The notice is filed for Peter P. Sena III, identified as an officer of SOUTHERN CO. The filing states that the securities to be sold are common stock, originally received through the vesting of restricted stock units as compensatory payments.

When are the SOUTHERN CO (SO) shares expected to be sold under this Form 144?

The Form 144 lists a proposed date of sale of September 3, 2026 for the 4,266 common shares. Form 144 is a notice of proposed sale, so it indicates an intended transaction date rather than confirming that the sale has been completed.

What is the value of the SOUTHERN CO (SO) shares listed in the Form 144?

The filing reports an aggregate market value of $377,924.94 for the 4,266 SOUTHERN CO common shares covered. This figure reflects the market value used in the Form 144 notice for the proposed transaction through Merrill Lynch on the NYSE.

How were the SOUTHERN CO (SO) shares obtained by the insider?

The 4,266 shares relate to restricted stock units that vested on December 15, 2024. The filing lists two tranches: 3,953 shares and 313 shares, each identified as “RESTRICTED STOCK UNIT VEST” and described as Compensatory Payment from SOUTHERN CO.

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

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Available on EDGAR 09/03/2026 - 04:02 PM EDT Accepted by SEC EDGAR 09/03/2026 - 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	0002023851
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	PETER P SENA III
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	4266	377924.94	1150362966	09/03/2026	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	12/15/2024	RESTRICTED STOCK UNIT VEST	THE SOUTHERN COMPANY			3953	12/15/2024	Compensatory Payment
Common	12/15/2024	RESTRICTED STOCK UNIT VEST	THE SOUTHERN COMPANY			313	12/15/2024	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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	09/03/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/05/2026
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	PETER P SENA III
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)