UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D. C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) ~~September~~October 1530, 2025

Commission
File Number

Registrant,
State of Incorporation,
Address and Telephone Number

I.R.S. Employer
Identification No.

1-3526

The Southern Company

58-0690070

(A Delaware Corporation)

30 Ivan Allen Jr. Boulevard, N.W.

Atlanta, Georgia 30308

(404) 506-5000

~~The~~1-3164 ~~name~~Alabama ~~and~~Power ~~address~~Company ~~of the registrant have not changed since the last report.~~63-0004250

~~Check~~(An ~~the~~Alabama ~~appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:~~Corporation)

600 North 18th Street

Birmingham, Alabama 35203

(205) 257-1000

1-6468

Georgia Power Company

58-0257110

(A Georgia Corporation)

241 Ralph McGill Boulevard, N.E.

Atlanta, Georgia 30308

(404) 506-6526

001-11229

Mississippi Power Company

64-0205820

(A Mississippi Corporation)

2992 West Beach Boulevard

Gulfport, Mississippi 39501

(228) 864-1211

001-37803

Southern Power Company

58-2598670

(A Delaware Corporation)

30 Ivan Allen Jr. Boulevard, N.W.

Atlanta, Georgia 30308

(404) 506-5000

1-14174

Southern Company Gas

58-2210952

(A Georgia Corporation)

Ten Peachtree Place, N.E.

Atlanta, Georgia 30309

(404) 584-4000

The names and addresses of the registrants have not changed since the last report.

This combined Form 8-K is furnished separately by six registrants: The Southern Company, Alabama Power Company, Georgia Power Company, Mississippi Power Company, Southern Power Company and Southern Company Gas. Information contained herein relating to each registrant is furnished by each registrant solely on its own behalf. Each registrant makes no representation as to information relating to the other registrants.

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrants under any of the following provisions:


☐			Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐			Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐			Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐			Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Registrant	Title of each class	TradingSymbol(s)	Name of each exchangeon which registered
The Southern Company	Common Stock, par value $5 per share	SO	New York Stock Exchange
The Southern Company	Series 2017B 5.25% Junior Subordinated Notes due 2077	SOJC	New York Stock Exchange
The Southern Company	Series 2020A 4.95% Junior Subordinated Notes due 2080	SOJD	New York Stock Exchange
The Southern Company	Series 2020C 4.20% Junior Subordinated Notes due 2060	SOJE	New York Stock Exchange
The Southern Company	Series 2021B 1.875% Fixed-to-Fixed Reset Rate Junior Subordinated Notes due 2081	SO 81	New York Stock Exchange
The Southern Company	Series 2025A 6.50% Junior Subordinated Notes due 2085	SOJF	New York Stock Exchange
Georgia Power Company	Series 2017A 5.00% Junior Subordinated Notes due 2077	GPJA	New York Stock Exchange
Southern Power Company	Series 2016B 1.850% Senior Notes due 2026	SO/26A	New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). (Response applicable to each registrant)

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 72.~~01.~~02 ~~Regulation~~Results FDof ~~Disclosure.~~Operations and Financial Condition

~~On September 15, 2025,~~ The ~~Southern~~information ~~Company~~in (the “Company”) announced an adjustment (the “Adjustment”) to the conversion rate for its Series 2023A 3.875% Convertible Senior Notes due December 15, 2025 (the “Series 2023A Convertible Senior Notes”). The notice of the Adjustment is attached as Exhibit 99.1 to this Current Report on Form 8-K, ~~and~~including ~~will also be posted to~~ the ~~fixed~~exhibits ~~income~~attached ~~section~~hereto, ofshall ~~the~~not ~~Company’s~~be ~~investor~~deemed ~~relations website — https://investor.southerncompany.com/fixed-income/default.aspx — under the~~ “~~Additional Information~~filed” ~~heading.~~for ~~The~~purposes ~~Company~~of ~~advises~~Section ~~that~~18 itof ~~intends~~the toSecurities ~~make~~Exchange ~~public~~Act ~~disclosures~~of in1934, ~~this~~as ~~location~~amended, ofor ~~its~~otherwise ~~website~~subject ~~for~~to ~~conversion~~the ~~rate~~liabilities ~~adjustments~~under ~~(if~~that ~~any)~~Section. Furthermore, ~~for~~such ~~the~~information, ~~Series~~including ~~2023A~~the ~~Convertible~~exhibits ~~Senior~~attached ~~Notes~~hereto, ~~its~~shall ~~Series~~not ~~2024A~~be ~~4.50%~~deemed ~~Convertible~~to ~~Senior~~be ~~Notes~~incorporated ~~due~~by ~~June~~reference ~~15,~~in ~~2027,~~any ~~its~~filing ~~Series~~under ~~2025A~~the ~~3.25%~~Securities ~~Convertible~~Act ~~Senior~~of ~~Notes~~1933, ~~due~~as ~~June 15~~amended, ~~2028~~except ~~and~~as ~~other~~shall ~~convertible~~be ~~notes~~expressly ~~(if~~set ~~any)~~forth itby ~~issues~~specific reference in ~~the~~such ~~future~~filing.

Item 9.01.			Financial Statements and Exhibits.
(d) Exhibits.
99.1			Notice to Holders of the Series 2023A Convertible Senior Notes.
104			Cover Page Interactive Data File – The cover page iXBRL tags are embedded within the inline XBRL document.

On October 30, 2025, The Southern Company (“Southern Company”) issued a press release regarding its earnings for the three-month and nine-month periods ended September 30, 2025, including certain additional information regarding the financial results for such period. A copy of this release is being furnished as Exhibit 99 to this Current Report on Form 8-K.

~~SIGNATURE~~Use of Non-GAAP Financial Measures

~~Pursuant~~Exhibit 99 to this Current Report on Form 8-K includes earnings and earnings per share in accordance with generally accepted accounting principles (“GAAP”) for the ~~requirements~~three-month ofand nine-month periods ended September 30, 2025 and 2024. The exhibit also includes earnings and earnings per share (1) for the ~~Securities~~three-month ~~Exchange~~and ~~Act~~nine-month periods ended September 30, 2025 and 2024, excluding charges (net of ~~1934~~salvage proceeds) and credits, associated legal expenses (net of insurance recoveries), and tax impacts related to plants under construction, (2) for the ~~registrant~~three-month ~~has~~and ~~duly~~nine-month ~~caused~~periods ~~this~~ended ~~report~~September 30, 2025, excluding (a) accelerated depreciation related to bethe ~~signed~~repowering onof ~~its~~certain ~~behalf~~wind byfacilities at Southern Power Company and (b) disposition impacts related to the ~~undersigned~~sale ~~hereunto~~of ~~duly~~a ~~authorized~~multi-use commercial facility development at Alabama Power Company, (3) for the nine-month period ended September 30, 2025, excluding costs associated with the extinguishment of debt at Southern Company, and (4) for the three-month and nine-month periods ended September 30, 2024, excluding an impairment loss associated with Alabama Power Company discontinuing development of the multi-use commercial facility discussed above. The attached exhibit includes additional information regarding these excluded

Date: September 15, 2025	THE SOUTHERN COMPANY
	By	/s/Melissa K. Caen
		Melissa K. CaenAssistant Secretary

items, as well as reconciliations of each non-GAAP financial measure to the most comparable financial measure under GAAP. Southern Company believes the presentation of earnings and earnings per share, excluding these items, is useful to investors because it provides investors with additional information to evaluate the performance of Southern Company’s ongoing business activities. Southern Company management also uses earnings and earnings per share, excluding the effect of these items, to evaluate the performance of Southern Company’s ongoing business activities. The presentation of this additional information is not meant to be considered a substitute for financial measures prepared in accordance with GAAP.

Exhibits

Exhibit 99 contains business segment information for Alabama Power Company, Georgia Power Company, Mississippi Power Company, Southern Power Company and Southern Company Gas. Accordingly, this report is also being furnished on behalf of each such registrant.


			Exhibit 99			Press Release.
			Exhibit 104			Cover Page Interactive Data File – The cover page iXBRL tags are embedded within the inline XBRL document.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, each of the registrants has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.


Date: October 30, 2025	THE SOUTHERN COMPANY
	By	/s/Matthew M. Kim
		Matthew M. Kim Comptroller

	ALABAMA POWER COMPANY GEORGIA POWER COMPANY MISSISSIPPI POWER COMPANY SOUTHERN POWER COMPANY SOUTHERN COMPANY GAS
	By	/s/Melissa K. Caen
		Melissa K. Caen Assistant Secretary

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