Southern Company (SO) lists vested award sales

Southern Company (SO) reports proposed sales of Common Stock tied to vested equity awards under compensatory plans.

Accepted by SEC EDGAR 03/19/2026 - 04:06 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Southern Company (SO) reports proposed sales of Common Stock tied to vested equity awards under compensatory plans. The filing lists planned dispositions connected to vested performance stock units and restricted stock units with specific vesting dates in January and February 2026.

The notice shows individual vesting quantities including 4,000, 967, 783, 731, 98, 69, and 21 shares or units on the listed dates; these items are described as compensatory payments.

Insights

Equity Compensation Analyst

Routine Form 144: planned sales following vesting of compensation awards.

The filing enumerates vested equity awards—performance stock units and restricted stock units—that are the source of the proposed dispositions. Each line ties a quantity to a vesting date in January-February 2026, and the entries are labeled as compensatory payment.

These filings are procedural: they notify the market of intended sales by holders after vesting. Cash‑flow treatment and whether sales will be open‑market or via other methods are not specified in the provided excerpt.

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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	0001642170
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, NW Atlanta GEORGIA 30308
Phone	404-506-5000
Name of Person for Whose Account the Securities are To Be Sold	Christopher Cummiskey
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, Suite 1000 Atlanta GA 30326	6669	643891.95	1119391291	03/19/2026	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	02/11/2026	PERFORMANCE STOCK UNIT VEST	SOUTHERN COMPANY			4000	02/11/2026	COMPENSATORY PAYMENT
Common	02/11/2026	RESTRICTED STOCK UNIT VEST	SOUTHERN COMPANY			21	02/11/2026	COMPENSATORY PAYMENT
Common	02/11/2026	RESTRICTED STOCK UNIT VEST	SOUTHERN COMPANY			731	02/11/2026	COMPENSATORY PAYMENT
Common	02/01/2026	RESTRICTED STOCK UNIT VEST	SOUTHERN COMPANY			98	02/01/2026	COMPENSATORY PAYMENT
Common	02/01/2026	RESTRICTED STOCK UNIT VEST	SOUTHERN COMPANY			783	02/01/2026	COMPENSATORY PAYMENT
Common	01/31/2026	RESTRICTED STOCK UNIT VEST	SOUTHERN COMPANY			967	01/31/2026	COMPENSATORY PAYMENT
Common	01/31/2026	RESTRICTED STOCK UNIT VEST	SOUTHERN COMPANY			69	01/31/2026	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	03/19/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	11/18/2025
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	Christopher Cummiskey
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)