Southern Co (NYSE: SO) EVP Sloane Drake equity units vest; shares withheld for taxes

Rhea-AI Filing Summary

Southern Co EVP & CHRO Sloane N. Drake reported routine equity compensation activity. On March 8, 2026, the final one-third of performance restricted stock units granted on March 8, 2023 vested, resulting in 1,420 shares of Southern Company common stock, including 145 dividend equivalent units, being acquired at no cost.

To cover required state and federal taxes, 633 shares were withheld at $97.48 per share, leaving a net increase of 787 directly held shares. After these transactions, Drake directly owns 38,932 shares of common stock and indirectly holds 2,621.475 shares through a 401(k) plan. No derivative awards remain from this grant.

Insights

Equity compensation analyst

Routine vesting of equity awards with tax withholding.

The filing shows Sloane N. Drake, EVP & CHRO of Southern Co, receiving 1,420 common shares from vesting of performance restricted stock units granted on March 8, 2023, including 145 dividend equivalent units. This is standard equity compensation rather than an open-market purchase.

To satisfy tax obligations, 633 shares were withheld at $97.48 per share, a non-market disposition typical for vesting events. Afterward, Drake directly holds 38,932 shares and indirectly 2,621.475 shares in a 401(k) plan. With no remaining derivative units from this grant, the activity appears routine and not thesis-changing.

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
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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^*

Drake Sloane N

(Last) (First) (Middle)

30 IVAN ALLEN JR BLVD NW

(Street)

ATLANTA GA 30308

(City) (State) (Zip)

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)
	EVP & CHRO

3. Date of Earliest Transaction (Month/Day/Year)
03/08/2026

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

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

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

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)
			Code	V	Amount	(A) or (D)	Price
Southern Company Common Stock	03/08/2026		M		1,420(1)	A	$0	39,565	D
Southern Company Common Stock	03/08/2026		F		633(2)	D	$97.48	38,932	D
Southern Company Common Stock								2,621.475	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Performance Restricted Stock Units Holding	$0	03/08/2026		M			1,275(3)	(3)	(3)	Southern Company Common Stock	1,275(3)	$0	0	D

Explanation of Responses:

1. Shares acquired upon vesting of the final 1/3 of performance restricted stock units granted on March 8, 2023. Includes 145 accrued dividend equivalent units.

2. Shares withheld to satisfy required state and federal tax withholding requirements.

3. Represents the final 1/3 of performance restricted stock units granted on March 8, 2023. Each restricted stock unit represents the right to receive, at settlement, one share of common stock.

	/s/ Brittney Anderson, Attorney-in-Fact for Sloane N. Drake	03/10/2026
	** 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.

FAQ

What insider transaction did Southern Co (SO) report for Sloane N. Drake?

Southern Co reported that EVP & CHRO Sloane N. Drake had performance restricted stock units vest, delivering 1,420 common shares on March 8, 2026. These shares came from the final one-third of units granted on March 8, 2023, including 145 dividend equivalent units.

How many Southern Co (SO) shares were withheld for taxes in this Form 4?

The filing shows 633 shares of Southern Company common stock were withheld at $97.48 per share to satisfy required state and federal tax withholding. This is a non-market tax-withholding disposition, not an open-market sale, tied directly to the vesting event.

What is Sloane N. Drake’s shareholding in Southern Co (SO) after the transactions?

After the reported transactions, Sloane N. Drake directly owns 38,932 shares of Southern Company common stock. Additionally, Drake indirectly holds 2,621.475 shares through a 401(k) plan, reflecting total visible holdings in this Form 4 disclosure.

What type of equity awards vested for Sloane N. Drake at Southern Co (SO)?

The transaction involved the final one-third of performance restricted stock units granted on March 8, 2023. Each restricted stock unit entitled Drake to receive one share of Southern Company common stock at settlement, plus associated dividend equivalent units credited over time.

Did Sloane N. Drake buy or sell Southern Co (SO) stock on the market?

The Form 4 does not show open-market buys or sells. It reports vesting of performance restricted stock units into 1,420 shares and a tax-withholding disposition of 633 shares. These are compensation-related and withholding transactions, not discretionary market trades.

Were any derivative positions left for Sloane N. Drake after this Southern Co (SO) filing?

No remaining derivative positions from this award are shown. The filing indicates the final one-third of the performance restricted stock units granted on March 8, 2023 vested, and the derivative summary is empty, suggesting this specific grant has been fully settled into common shares.