Southern Co comptroller sells 100 shares at $95.77

Southern Company’s comptroller, Matthew M. Kim, reported a small open-market sale of common stock.

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Form Type

Rhea-AI Filing Summary

Southern Company’s comptroller, Matthew M. Kim, reported a small open-market sale of common stock. On 2026-07-01, he sold 100 shares of Southern Company Common Stock at $95.77 per share.

After this sale, Kim directly holds 6,588 shares and indirectly holds 1,212.1903 shares through a 401(k) plan. The filing shows no option exercises or derivative positions, indicating this was a straightforward, modest open-market sale alongside ongoing retirement-plan holdings.

Insider Trade Summary 10b5-1

Net Seller: 100 shares

Net Sell 2 txns

Insider Kim Matthew M.

Role Comptroller

Sold 100 shs ($10K)

Type	Security	Shares	Price	Value
Sale	Southern Company Common Stock	100	$95.77	$10K
holding	Southern Company Common Stock	--	--	--

Holdings After Transaction: Southern Company Common Stock — 6,588 shares (Direct); Southern Company Common Stock — 1,212.1903 shares (Indirect, 401(k))

Key Figures

Shares sold: 100 shares Sale price per share: $95.77/share Direct holdings after sale: 6,588 shares +1 more

4 metrics

Shares sold 100 shares Open-market sale of Southern Company Common Stock on 2026-07-01

Sale price per share $95.77/share Price for the 100 shares sold with transaction code S

Direct holdings after sale 6,588 shares Southern Company Common Stock directly owned following the transaction

Indirect 401(k) holdings 1,212.1903 shares Southern Company Common Stock held indirectly through a 401(k) plan

Key Terms

open-market sale, transaction code S, indirect ownership, 401(k)

4 terms

open-market sale financial

"transaction_action is described as an open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

transaction code S regulatory

"transaction_code S indicates a sale in open market or private transaction"

indirect ownership financial

"ownership_type is indirect for shares held through a 401(k)"

401(k) financial

"nature_of_ownership lists 401(k) for part of the holdings"

A 401(k) is a type of retirement savings plan offered by employers that allows workers to set aside a portion of their paycheck before taxes are taken out. The money saved in a 401(k) can grow over time through investments, helping individuals build funds for their future retirement. It matters to investors because it provides a tax-advantaged way to save and invest for long-term financial security.

FAQ

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

What insider transaction did Southern Co (SO) report for Matthew M. Kim?

Southern Co reported that comptroller Matthew M. Kim sold 100 shares of Southern Company Common Stock. The sale occurred on 2026-07-01 and was executed as an open-market or private transaction at a stated price of $95.77 per share.

At what price did Southern Co (SO) insider Matthew M. Kim sell shares?

Matthew M. Kim sold 100 Southern Company Common Stock shares at $95.77 per share. This price comes directly from the Form 4 transaction data describing an open-market or private sale executed on 2026-07-01 under transaction code S.

How many Southern Co (SO) shares does Matthew M. Kim hold after the reported sale?

After the reported sale, Matthew M. Kim directly holds 6,588 Southern Company Common Stock shares. He also has an indirect position of 1,212.1903 shares held through a 401(k) plan, according to the Form 4 ownership tables.

Was the Southern Co (SO) transaction by Matthew M. Kim a buy or a sell?

The Form 4 classifies Matthew M. Kim’s transaction as a sell. It shows a transaction code S, labeled as a sale in open market or private transaction, for 100 shares of Southern Company Common Stock on 2026-07-01.

Does Southern Co (SO) insider Matthew M. Kim hold shares indirectly?

Yes. In addition to his direct holdings, Matthew M. Kim has indirect ownership of 1,212.1903 Southern Company Common Stock shares. These indirect shares are held through a 401(k) plan, as indicated by the ownership type and nature-of-ownership fields.

Does the Southern Co (SO) Form 4 show any option exercises or derivatives for Matthew M. Kim?

The Form 4 derivative summary is empty, indicating no derivative transactions like option exercises or conversions. All reported positions are in Southern Company Common Stock, with one open-market sale and a separate 401(k) holding entry.

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

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 07/02/2026 - 02:00 PM EDT

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Kim Matthew M.

(Last)

(First)

(Middle)

30 IVAN ALLEN JR. BLVD., NW

(Street)

ATLANTA

GEORGIA

30308

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
SOUTHERN CO [ SO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	Comptroller

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Southern Company Common Stock	07/01/2026		S		100	D	$95.77	6,588	D
Southern Company Common Stock								1,212.1903	I	401(k)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

	/s/ Brittney Anderson, Attorney-in-Fact for Matthew M. Kim	07/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR