GAS / AGL Resources Inc. - Pemfailan SEC, Laporan Tahunan, Penyata Proksi

AGL Resources Inc.
US ˙ NYSE
SIMBOL INI TIDAK AKTIF LAGI

Statistik Asas
CIK 1004155
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to AGL Resources Inc.
SEC Filings (Chronological Order)
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September 5, 2025 424B2

$425,000,000 SOUTHERN COMPANY GAS CAPITAL CORPORATION Series 2025B 5.10% Senior Notes due September 15, 2035

Filed Pursuant to Rule 424(b)(2) Registration Nos. 333-285115 and 333-285115-01 Prospectus Supplement (To Prospectus dated February 21, 2025) $425,000,000 SOUTHERN COMPANY GAS CAPITAL CORPORATION Series 2025B 5.10% Senior Notes due September 15, 2035 This is a public offering by Southern Company Gas Capital Corporation (the “Issuer”), a wholly-owned subsidiary of Southern Company Gas (the “Company

September 5, 2025 EX-FILING FEES

Security Type

Calculation of Filing Fee Tables S-3 SOUTHERN CO GAS Table 1: Newly Registered and Carry Forward Securities ☐Not Applicable Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Debt Series 2025A 4.

September 5, 2025 424B2

$425,000,000 SOUTHERN COMPANY GAS CAPITAL CORPORATION Series 2025A 4.05% Senior Notes due September 15, 2028

Filed Pursuant to Rule 424(b)(2) Registration Nos. 333-285115 and 333-285115-01 Prospectus Supplement (To Prospectus dated February 21, 2025) $425,000,000 SOUTHERN COMPANY GAS CAPITAL CORPORATION Series 2025A 4.05% Senior Notes due September 15, 2028 This is a public offering by Southern Company Gas Capital Corporation (the “Issuer”), a wholly-owned subsidiary of Southern Company Gas (the “Company

September 5, 2025 EX-FILING FEES

Security Type

Calculation of Filing Fee Tables S-3 SOUTHERN CO GAS Table 1: Newly Registered and Carry Forward Securities ☐Not Applicable Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Debt Series 2025B 5.

September 3, 2025 FWP

PRICING TERM SHEET (To Preliminary Prospectus Supplement dated September 3, 2025)

Filed Pursuant to Rule 433 Registration Nos. 333-285115 and 333-285115-01 September 3, 2025 PRICING TERM SHEET (To Preliminary Prospectus Supplement dated September 3, 2025) Issuer: Southern Company Gas Capital Corporation Guarantor: Southern Company Gas Security: Series 2025B 5.10% Senior Notes due September 15, 2035 Expected Ratings:* Baa1 (Stable) / A- (Stable) / BBB+ (Stable) (Moody’s/ Standar

September 3, 2025 424B5

SUBJECT TO COMPLETION PRELIMINARY PROSPECTUS SUPPLEMENT DATED SEPTEMBER 3, 2025

Filed Pursuant to Rule 424(b)(5) Registration Nos. 333-285115 and 333-285115-01 This Preliminary Prospectus Supplement and the accompanying Prospectus relate to an effective registration statement under the Securities Act of 1933, as amended, but the Preliminary Prospectus Supplement is not complete and may be changed. This Preliminary Prospectus Supplement and the accompanying Prospectus are not

September 3, 2025 424B5

SUBJECT TO COMPLETION PRELIMINARY PROSPECTUS SUPPLEMENT DATED SEPTEMBER 3, 2025

Filed Pursuant to Rule 424(b)(5) Registration Nos. 333-285115 and 333-285115-01 This Preliminary Prospectus Supplement and the accompanying Prospectus relate to an effective registration statement under the Securities Act of 1933, as amended, but the Preliminary Prospectus Supplement is not complete and may be changed. This Preliminary Prospectus Supplement and the accompanying Prospectus are not

September 3, 2025 FWP

PRICING TERM SHEET (To Preliminary Prospectus Supplement dated September 3, 2025)

Filed Pursuant to Rule 433 Registration Nos. 333-285115 and 333-285115-01 September 3, 2025 PRICING TERM SHEET (To Preliminary Prospectus Supplement dated September 3, 2025) Issuer: Southern Company Gas Capital Corporation Guarantor: Southern Company Gas Security: Series 2025A 4.05% Senior Notes due September 15, 2028 Expected Ratings:* Baa1 (Stable) / A- (Stable) / BBB+ (Stable) (Moody’s/ Standar

July 31, 2025 EX-32.E

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(e) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Southern Power Company for the quarter ended June 30, 2025, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the be

July 31, 2025 EX-31.C2

GEORGIA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(c)2 GEORGIA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Aaron P.

July 31, 2025 EX-32.C

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(c) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Georgia Power Company for the quarter ended June 30, 2025, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the bes

July 31, 2025 EX-99

Southern Company reports second-quarter 2025 earnings

Exhibit 99 Page 1 News Media Contact: Southern Company Media Relations 404-506-5333 or 1-866-506-5333 southerncompany.

July 31, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 ☐ TRANSITION REPORT PURSUANT TO S

Table of Contents Index to Financial Statements UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

July 31, 2025 EX-32.D

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(d) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Mississippi Power Company for the quarter ended June 30, 2025, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the

July 31, 2025 EX-32.A

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(a) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of The Southern Company for the quarter ended June 30, 2025, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best

July 31, 2025 EX-32.B

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(b) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Alabama Power Company for the quarter ended June 30, 2025, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the bes

July 31, 2025 EX-31.F2

SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(f)2 SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Grace A.

July 31, 2025 EX-31.F1

SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(f)1 SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, James Y.

July 31, 2025 EX-31.D1

MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(d)1 MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Anthony L.

July 31, 2025 EX-31.A1

THE SOUTHERN COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(a)1 THE SOUTHERN COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Christopher C.

July 31, 2025 8-K

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

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) July 31, 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 Dela

July 31, 2025 EX-31.E2

SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(e)2 SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Gary Kerr, certify that: 1.

July 31, 2025 EX-31.D2

MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(d)2 MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Matthew P.

July 31, 2025 EX-31.B2

ALABAMA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(b)2 ALABAMA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Moses H.

July 31, 2025 EX-31.C1

GEORGIA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(c)1 GEORGIA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Kimberly S.

July 31, 2025 EX-31.E1

SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(e)1 SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Christopher Cummiskey, certify that: 1.

July 31, 2025 EX-32.F

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(f) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Southern Company Gas for the quarter ended June 30, 2025, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best

July 31, 2025 EX-31.A2

THE SOUTHERN COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(a)2 THE SOUTHERN COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Daniel S.

July 31, 2025 EX-31.B1

ALABAMA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(b)1 ALABAMA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, J.

May 1, 2025 EX-4.D2

MISSISSIPPI POWER COMPANY REGIONS BANK, SEVENTH SUPPLEMENTAL INDENTURE DATED AS OF MARCH 28, 2025 SERIES 2025B 6.03% SENIOR NOTES DUE MARCH 15, 2055 TABLE OF CONTENTS1

Exhibit 4(d)2 MISSISSIPPI POWER COMPANY TO REGIONS BANK, TRUSTEE SEVENTH SUPPLEMENTAL INDENTURE DATED AS OF MARCH 28, 2025 SERIES 2025B 6.

May 1, 2025 EX-31.E2

SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(e)2 SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Gary Kerr, certify that: 1.

May 1, 2025 EX-31.B1

ALABAMA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(b)1 ALABAMA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, J.

May 1, 2025 EX-31.B2

ALABAMA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(b)2 ALABAMA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Moses H.

May 1, 2025 EX-32.C

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(c) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Georgia Power Company for the quarter ended March 31, 2025, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the be

May 1, 2025 8-K

Results of Operations and Financial Condition

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) May 1, 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 Delawa

May 1, 2025 EX-99

Southern Company reports first-quarter 2025 earnings

Exhibit 99 Page 1 News Media Contact: Southern Company Media Relations 404-506-5333 or 1-866-506-5333 southerncompany.

May 1, 2025 EX-31.C1

GEORGIA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(c)1 GEORGIA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Kimberly S.

May 1, 2025 EX-31.A2

THE SOUTHERN COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(a)2 THE SOUTHERN COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Daniel S.

May 1, 2025 EX-32.A

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(a) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of The Southern Company for the quarter ended March 31, 2025, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the bes

May 1, 2025 EX-31.F2

SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(f)2 SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Grace A.

May 1, 2025 EX-31.F1

SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(f)1 SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, James Y.

May 1, 2025 EX-32.D

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(d) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Mississippi Power Company for the quarter ended March 31, 2025, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to th

May 1, 2025 EX-31.A1

THE SOUTHERN COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(a)1 THE SOUTHERN COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Christopher C.

May 1, 2025 EX-32.B

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(b) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Alabama Power Company for the quarter ended March 31, 2025, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the be

May 1, 2025 EX-31.D2

MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(d)2 MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Matthew P.

May 1, 2025 EX-31.E1

SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(e)1 SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Christopher Cummiskey, certify that: 1.

May 1, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 ☐ TRANSITION REPORT PURSUANT TO

Table of Contents Index to Financial Statements UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

May 1, 2025 EX-31.D1

MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(d)1 MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Anthony L.

May 1, 2025 EX-31.C2

GEORGIA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(c)2 GEORGIA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Aaron P.

May 1, 2025 EX-4.D1

MISSISSIPPI POWER COMPANY REGIONS BANK, SIXTH SUPPLEMENTAL INDENTURE DATED AS OF MARCH 28, 2025 SERIES 2025A 5.01% SENIOR NOTES DUE MARCH 15, 2030 TABLE OF CONTENTS1

Exhibit 4(d)1 MISSISSIPPI POWER COMPANY TO REGIONS BANK, TRUSTEE SIXTH SUPPLEMENTAL INDENTURE DATED AS OF MARCH 28, 2025 SERIES 2025A 5.

May 1, 2025 EX-32.E

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(e) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Southern Power Company for the quarter ended March 31, 2025, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the b

May 1, 2025 EX-32.F

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(f) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Southern Company Gas for the quarter ended March 31, 2025, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the bes

February 21, 2025 EX-FILING FEES

Calculation of Filing Fee Tables Form S-3 (Form Type) Southern Company Gas Southern Company Gas Capital Corporation (Exact Name of Each Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Secur

Exhibit 107.1 Calculation of Filing Fee Tables Form S-3 (Form Type) Southern Company Gas Southern Company Gas Capital Corporation (Exact Name of Each Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offer

February 21, 2025 EX-24.1

February 19, 2025

Exhibit 24.1 February 19, 2025 Mr. Daniel S. Tucker The Southern Company 30 Ivan Allen Jr. Blvd, N.W. Atlanta, GA 30308 Ms. Grace A. Kolvereid Southern Company Gas Ten Peachtree Place, N.E. Atlanta, GA 30309 Ms. Melissa K. Caen Southern Company Services, Inc. 30 Ivan Allen Jr. Blvd, N.W. Atlanta, GA 30308 Ladies and Mr. Tucker: Southern Company Gas proposes to file with the Securities and Exchange

February 21, 2025 EX-25.1

_____________________________________________________________________________ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED

Exhibit 25.1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE Check if an Application to Determine Eligibility of a Trustee Pursuant to Section 305(b)(2) ☐ U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION (Exact name of Trustee as specified in its charter) 91-18

February 21, 2025 EX-4.11

_____________________________ SOUTHERN COMPANY GAS CAPITAL CORPORATION Adopted effective as of December 31, 2024 SOUTHERN COMPANY GAS CAPITAL CORPORATION ARTICLE I Offices

Exhibit 4.11 SOUTHERN COMPANY GAS CAPITAL CORPORATION BYLAWS Adopted effective as of December 31, 2024 SOUTHERN COMPANY GAS CAPITAL CORPORATION BYLAWS ARTICLE I Offices Section 1. Registered Office. The registered office of the Corporation, as designated in the Certificate of Incorporation, may be changed from time to time by resolution of the Board of Directors and by filing notice of such change

February 21, 2025 EX-4.10

ALABAMA CERTIFICATE OF INCORPORATION SOUTHERN COMPANY GAS CAPITAL CORPORATION

Exhibit 4.10 ALABAMA CERTIFICATE OF INCORPORATION OF SOUTHERN COMPANY GAS CAPITAL CORPORATION The undersigned, for the purpose of forming an Alabama corporation in connection with the conversion of a Nevada corporation into an Alabama corporation under the Alabama Business and Nonprofit Entities Code, Title 10A, of the Code of Alabama (1975), as amended (the “Alabama Law”), hereby files the follow

February 21, 2025 S-3ASR

As filed with the Securities and Exchange Commission on February 21, 2025.

As filed with the Securities and Exchange Commission on February 21, 2025. Registration Nos. 333- 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Southern Company Gas Southern Company Gas Capital Corporation (Exact name of registrant as specified in its charter) Georgia Alabama (State or other jurisdictio

February 21, 2025 EX-24.2

February 19, 2025

Exhibit 24.2 February 19, 2025 Mr. Daniel S. Tucker The Southern Company 30 Ivan Allen Jr. Blvd, N.W. Atlanta, GA 30308 Ms. Grace A. Kolvereid Southern Company Gas Ten Peachtree Place, N.E. Atlanta, GA 30309 Ms. Melissa K. Caen Southern Company Services, Inc. 30 Ivan Allen Jr. Blvd, N.W. Atlanta, GA 30308 Ladies and Mr. Tucker: Southern Company Gas Capital Corporation proposes to file with the Sec

February 21, 2025 EX-4.2

SOUTHERN COMPANY GAS CAPITAL CORPORATION SOUTHERN COMPANY GAS U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION as Trustee Dated as of February 1, 2025 GUARANTEED DEBT SECURITIES TABLE OF CONTENTS

Exhibit 4.2 SOUTHERN COMPANY GAS CAPITAL CORPORATION Issuer and SOUTHERN COMPANY GAS Guarantor U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION as Trustee - INDENTURE Dated as of February 1, 2025 GUARANTEED DEBT SECURITIES TABLE OF CONTENTS Page ARTICLE One Definitions and other Provisions of General Application 1 SECTION 101. Definitions 1 SECTION 102. Compliance Certificates and Opinions 5 SECTION

February 20, 2025 EX-32.D

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(d) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Annual Report on Form 10-K of Mississippi Power Company for the year ended December 31, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the b

February 20, 2025 EX-24.B1

January 24, 2025

Exhibit 24(b)1 600 North 18th Street Post Office Box 2641 Birmingham, Alabama 35291-0001 Tel 205 257 1000 January 24, 2025 Daniel S.

February 20, 2025 EX-19.B

1

Exhibit 19(b) Prohibition of Securities Trading Policy Policy Statement: This policy sets forth rules to follow with respect to securities trading and pre-clearance.

February 20, 2025 EX-31.D2

MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(d)2 MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Matthew P.

February 20, 2025 EX-32.E

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(e) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Annual Report on Form 10-K of Southern Power Company for the year ended December 31, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best

February 20, 2025 EX-19.E

1

Exhibit 19(e) Policy Statement: This policy sets forth rules to follow with respect to securities trading and pre-clearance.

February 20, 2025 EX-23.A1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 23(a)1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement Nos.

February 20, 2025 EX-31.B1

ALABAMA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(b)1 ALABAMA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, J.

February 20, 2025 EX-10.A2

SOUTHERN COMPANY DEFERRED COMPENSATION PLAN

Exhibit 10(a)2 SOUTHERN COMPANY DEFERRED COMPENSATION PLAN Amended and Restated as of January 1, 2025 SOUTHERN COMPANY DEFERRED COMPENSATION PLAN TABLE OF CONTENTS ARTICLE I Purpose and Adoption of Plan 1 ARTICLE II Descriptions 2 ARTICLE III Administration of Plan 5 ARTICLE IV Eligibility 7 ARTICLE V Deferral Election 8 ARTICLE VI Participants' Accounts 9 ARTICLE VII Account Distribution 11 ARTICLE VIII Miscellaneous Provisions 13 SOUTHERN COMPANY DEFERRED COMPENSATION PLAN ARTICLE I Purpose and Adoption of Plan 1.

February 20, 2025 EX-19.D

1

Exhibit 19(d) Prohibition of Securities Trading Policy Policy Statement: This policy sets forth rules to follow with respect to securities trading and pre-clearance.

February 20, 2025 EX-32.B

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(b) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Annual Report on Form 10-K of Alabama Power Company for the year ended December 31, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best

February 20, 2025 EX-24.D1

October 23, 2024

Exhibit 24(d)1 October 23, 2024 Mr. Daniel S. Tucker The Southern Company 30 Ivan Allen Jr. Blvd., NW Atlanta, GA 30308 Ms. Melissa K. Caen Southern Company Services, Inc. 30 Ivan Allen Jr. Blvd., NW Atlanta, GA 30308 Mr. Tucker and Ms. Caen: Mississippi Power Company (the “Company”) proposes to file or join in the filing of reports under the Securities Exchange Act of 1934, as amended, with the S

February 20, 2025 EX-99

Southern Company reports fourth-quarter and full-year 2024 earnings

Exhibit 99 Page 1 News Media Contact: Southern Company Media Relations 404-506-5333 or 1-866-506-5333 southerncompany.

February 20, 2025 EX-31.B2

ALABAMA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(b)2 ALABAMA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Moses H.

February 20, 2025 EX-31.F2

SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(f)2 SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Grace A.

February 20, 2025 EX-31.E1

SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(e)1 SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Christopher Cummiskey, certify that: 1.

February 20, 2025 EX-31.C1

GEORGIA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(c)1 GEORGIA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Kimberly S.

February 20, 2025 EX-23.D1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 23(d)1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement No.

February 20, 2025 EX-32.F

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(f) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Annual Report on Form 10-K of Southern Company Gas for the year ended December 31, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best o

February 20, 2025 EX-24.C1

- 2 -

Exhibit 24(c)1 November 20, 2024 Aaron P. Abramovitz, Daniel S. Tucker and Melissa K. Caen Gentlemen and Ms. Caen: Georgia Power Company (the “Company”) proposes to file or join in the filing of reports under the Securities Exchange Act of 1934, as amended, with the Securities and Exchange Commission with respect to the following: (1) the Company’s Annual Report on Form 10-K for the year ended Dec

February 20, 2025 EX-31.E2

SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(e)2 SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Gary Kerr, certify that: 1.

February 20, 2025 EX-32.C

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(c) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Annual Report on Form 10-K of Georgia Power Company for the year ended December 31, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best

February 20, 2025 EX-31.F1

SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(f)1 SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, James Y.

February 20, 2025 EX-24.A1

Christopher C. Womack President and Chief Executive Officer

Exhibit 24(a)1 December 9, 2024 Laura O. Hewett and Melissa K. Caen Ms. Hewett and Ms. Caen: The Southern Company (the “Company”) proposes to file or join in the filing of reports under the Securities Exchange Act of 1934, as amended, with the Securities and Exchange Commission with respect to the following: (1) the Company’s Annual Report on Form 10-K for the year ended December 31, 2024 and (2)

February 20, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2024 ☐ TRANSITION REPORT PURSUANT TO SECTI

Table of Contents Index to Financial Statements UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

February 20, 2025 EX-23.E1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 23(e)1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement No.

February 20, 2025 EX-19.F

Policy Statement:

Exhibit 19(f) Policy Statement: This policy sets forth rules to follow with respect to securities trading and pre-clearance.

February 20, 2025 EX-31.D1

MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(d)1 MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Anthony L.

February 20, 2025 EX-19.A

1

Exhibit 19(a) Policy Statement: This policy sets forth rules to follow with respect to securities trading and pre-clearance.

February 20, 2025 EX-10.A13

NINTH AMENDMENT TO THE SOUTHERN COMPANY EMPLOYEE SAVINGS PLAN

Exhibit 10(a)13 NINTH AMENDMENT TO THE SOUTHERN COMPANY EMPLOYEE SAVINGS PLAN WHEREAS, Southern Company Services, Inc.

February 20, 2025 EX-21.A

Subsidiaries of the Registrant(1)

Exhibit 21(a) Subsidiaries of the Registrant(1) Name of Company Jurisdiction of Organization The Southern Company Delaware Alabama Power Company Alabama Alabama Property Company Alabama Southern Electric Generating Company Alabama Georgia Power Company Georgia Piedmont-Forrest Corporation Georgia Southern Electric Generating Company Alabama Mississippi Power Company Mississippi Southern Power Comp

February 20, 2025 EX-23.F1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 23(f)1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement No.

February 20, 2025 EX-24.E1

November 13, 2024

Exhibit 24(e)1 November 13, 2024 Mr. Gary Kerr Southern Power Company 3535 Colonnade Parkway Birmingham, AL 35243 Mr. D. Matt Madison Southern Power Company 3535 Colonnade Parkway Birmingham, AL 35243 Ms. Melissa K. Caen Southern Company Services, Inc. 30 Ivan Allen Jr. Blvd, NW Atlanta, GA 30308 Mr. Kerr, Mr. Madison and Ms. Caen: Southern Power Company (the “Company”) proposes to file or join in

February 20, 2025 EX-31.A1

THE SOUTHERN COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(a)1 THE SOUTHERN COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Christopher C.

February 20, 2025 EX-19.C

Georgia Power Company

Exhibit 19(c) Georgia Power Company Prohibition of Securities Trading Policy Policy Statement: This policy sets forth rules to follow with respect to securities trading and pre-clearance.

February 20, 2025 EX-23.F2

Consent of Independent Registered Public Accounting Firm

Exhibit 23(f)2 Consent of Independent Registered Public Accounting Firm We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No.

February 20, 2025 EX-32.A

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(a) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Annual Report on Form 10-K of The Southern Company for the year ended December 31, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best o

February 20, 2025 EX-31.C2

GEORGIA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(c)2 GEORGIA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Aaron P.

February 20, 2025 EX-31.A2

THE SOUTHERN COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(a)2 THE SOUTHERN COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Daniel S.

February 20, 2025 8-K

Results of Operations and Financial Condition

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) February 20, 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

February 20, 2025 EX-24.F1

James Y. Kerr II Chairman, President and Chief Executive Officer

Exhibit 24(f)1 December 11, 2024 Laura O. Hewett and Melissa K. Caen Ms. Hewett and Ms. Caen: Southern Company Gas (the “Company”) proposes to file or join in the filing of reports under the Securities Exchange Act of 1934, as amended, with the Securities and Exchange Commission with respect to the following: (1) the Company’s Annual Report on Form 10-K for the year ended December 31, 2024 and (2)

February 20, 2025 EX-23.B1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 23(b)1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement No.

January 3, 2025 8-K

Other Events

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) January 3, 2025 Commission File Number Registrant, State of Incorporation, Address and Telephone Number I.R.S. Employer Identification No. 1-14174 Southern Company Gas 58-2210952 (A G

October 31, 2024 EX-99

Southern Company reports third-quarter 2024 earnings

Exhibit 99 Page 1 News Media Contact: Southern Company Media Relations 404-506-5333 or 1-866-506-5333 southerncompany.

October 31, 2024 EX-32.D

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(d) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Mississippi Power Company for the quarter ended September 30, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, t

October 31, 2024 EX-31.E2

SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(e)2 SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Gary Kerr, certify that: 1.

October 31, 2024 EX-32.F

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(f) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Southern Company Gas for the quarter ended September 30, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the

October 31, 2024 EX-31.F1

SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(f)1 SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, James Y.

October 31, 2024 EX-31.A2

THE SOUTHERN COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(a)2 THE SOUTHERN COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Daniel S.

October 31, 2024 8-K

Results of Operations and Financial Condition

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) October 31, 2024 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 D

October 31, 2024 EX-31.C2

GEORGIA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(c)2 GEORGIA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Aaron P.

October 31, 2024 EX-31.B2

ALABAMA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(b)2 ALABAMA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Moses H.

October 31, 2024 EX-31.D1

MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(d)1 MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Anthony L.

October 31, 2024 EX-31.B1

ALABAMA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(b)1 ALABAMA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, J.

October 31, 2024 EX-4.F3

Supplemental Indenture Made as of August 13, 2024, to be Effective September 4, 2024 ____________________ Northern Illinois Gas Company to U.S. Bank Trust Company, National Association Trustee under Indenture dated as of January 1, 1954 Supplemental

Exhibit 4(f)3 When recorded return to: Michael M. Roth, Esq. Ice Miller LLP 2300 Cabot Drive Suite 455 Lisle, IL 60532 Space Above this Line Reserved for Recorder’s Use Only Supplemental Indenture Made as of August 13, 2024, to be Effective September 4, 2024 Northern Illinois Gas Company to U.S. Bank Trust Company, National Association Trustee under Indenture dated as of January 1, 1954 and Supple

October 31, 2024 EX-32.C

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(c) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Georgia Power Company for the quarter ended September 30, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to th

October 31, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 ☐ TRANSITION REPORT PURSUANT

Table of Contents Index to Financial Statements UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

October 31, 2024 EX-31.C1

GEORGIA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(c)1 GEORGIA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Kimberly S.

October 31, 2024 EX-31.A1

THE SOUTHERN COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(a)1 THE SOUTHERN COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Christopher C.

October 31, 2024 EX-32.B

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(b) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Alabama Power Company for the quarter ended September 30, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to th

October 31, 2024 EX-32.A

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(a) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of The Southern Company for the quarter ended September 30, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the

October 31, 2024 EX-31.F2

SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(f)2 SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Grace A.

October 31, 2024 EX-32.E

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(e) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Southern Power Company for the quarter ended September 30, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to t

October 31, 2024 EX-31.E1

SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(e)1 SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Christopher Cummiskey, certify that: 1.

October 31, 2024 EX-31.D2

MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(d)2 MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Matthew P.

September 6, 2024 8-K

Financial Statements and Exhibits, Other Events

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 3, 2024 Commission File Number Registrant, State of Incorporation, Address and Telephone Number I.R.S. Employer Identification No. 1-14174 Southern Company Gas 58-2210952 (A

September 6, 2024 EX-4.3

Designated in Form 8-K dated September 3, 2024. File No. 1-14174 as Exhibit 4.

Exhibit 4.3 GUARANTEE This GUARANTEE of Southern Company Gas, a Georgia corporation (the “Guarantor”), is dated as of , 20. The Guarantor, for value received, hereby unconditionally guarantees to each Holder of a Series 2024A 4.95% Senior Note due September 15, 2034 (a “Note”) of Southern Company Gas Capital Corporation, a Nevada corporation (the “Company”), authenticated and delivered by the Trus

September 6, 2024 EX-4.1

, 2024. File No. 1-14174 as Exhibit 4.1

Exhibit 4.1 This Security is a global security within the meaning of the Indenture hereinafter referred to and is registered in the name of a depositary (as specified pursuant to the Indenture) or a nominee thereof. This global security is exchangeable for securities registered in the name of a person other than the depositary or its nominee only in the limited circumstances described in, or pursu

September 6, 2024 EX-1.1

$450,000,000 Series 2024A 4.95% Senior Notes due September 15, 2034 SOUTHERN COMPANY GAS CAPITAL CORPORATION SOUTHERN COMPANY GAS UNDERWRITING AGREEMENT

Exhibit 1.1 $450,000,000 Series 2024A 4.95% Senior Notes due September 15, 2034 SOUTHERN COMPANY GAS CAPITAL CORPORATION SOUTHERN COMPANY GAS UNDERWRITING AGREEMENT September 3, 2024 BofA Securities, Inc. One Bryant Park New York, New York 10036 Citigroup Global Markets Inc. 388 Greenwich Street New York, New York 10013 MUFG Securities Americas Inc. 1221 Avenue of the Americas, 6th Floor New York,

September 4, 2024 EX-FILING FEES

EX-FILING FEES

Exhibit 107 The prospectus to which this Exhibit is attached is a final prospectus for the related offering. The maximum aggregate offering price for such offering is $448,447,500.

September 4, 2024 424B2

$450,000,000 SOUTHERN COMPANY GAS CAPITAL CORPORATION Series 2024A 4.95% Senior Notes due September 15, 2034

Filed Pursuant to Rule 424(b)(2) Registration Nos. 333-264573 and 333-264573-01 Prospectus Supplement (To Prospectus dated May 11, 2022) $450,000,000 SOUTHERN COMPANY GAS CAPITAL CORPORATION Series 2024A 4.95% Senior Notes due September 15, 2034 This is a public offering by Southern Company Gas Capital Corporation (the “Issuer”), a wholly-owned subsidiary of Southern Company Gas (the “Company” or

September 3, 2024 424B5

SUBJECT TO COMPLETION PRELIMINARY PROSPECTUS SUPPLEMENT DATED SEPTEMBER 3, 2024

Filed Pursuant to Rule 424(b)(5) Registration Nos. 333-264573 and 333-264573-01 This Preliminary Prospectus Supplement and the accompanying Prospectus relate to an effective registration statement under the Securities Act of 1933, as amended, but the Preliminary Prospectus Supplement is not complete and may be changed. This Preliminary Prospectus Supplement and the accompanying Prospectus are not

September 3, 2024 FWP

PRICING TERM SHEET (To Preliminary Prospectus Supplement dated September 3, 2024)

Filed Pursuant to Rule 433 Registration Nos. 333-264573 and 333-264573-01 September 3, 2024 PRICING TERM SHEET (To Preliminary Prospectus Supplement dated September 3, 2024) Issuer: Southern Company Gas Capital Corporation Guarantor: Southern Company Gas Security: Series 2024A 4.95% Senior Notes due September 15, 2034 Expected Ratings:* Baa1 (Stable) / A- (Stable) / BBB+ (Stable) (Moody’s/ Standar

August 1, 2024 EX-31.C1

GEORGIA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(c)1 GEORGIA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Kimberly S.

August 1, 2024 EX-32.F

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(f) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Southern Company Gas for the quarter ended June 30, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best

August 1, 2024 EX-31.F1

SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(f)1 SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, James Y.

August 1, 2024 EX-31.D2

MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(d)2 MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Matthew P.

August 1, 2024 EX-31.A2

THE SOUTHERN COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(a)2 THE SOUTHERN COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Daniel S.

August 1, 2024 EX-31.B2

ALABAMA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(b)2 ALABAMA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Moses H.

August 1, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 ☐ TRANSITION REPORT PURSUANT TO S

Table of Contents Index to Financial Statements UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

August 1, 2024 EX-31.C2

GEORGIA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(c)2 GEORGIA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Aaron P.

August 1, 2024 EX-31.A1

THE SOUTHERN COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(a)1 THE SOUTHERN COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Christopher C.

August 1, 2024 EX-32.A

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(a) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of The Southern Company for the quarter ended June 30, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best

August 1, 2024 EX-32.B

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(b) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Alabama Power Company for the quarter ended June 30, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the bes

August 1, 2024 EX-99

Southern Company reports second-quarter 2024 earnings

Exhibit 99 Page 1 News Media Contact: Southern Company Media Relations 404-506-5333 or 1-866-506-5333 southerncompany.

August 1, 2024 EX-31.E1

SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(e)1 SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Christopher Cummiskey, certify that: 1.

August 1, 2024 EX-31.E2

SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(e)2 SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Gary Kerr, certify that: 1.

August 1, 2024 EX-32.C

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(c) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Georgia Power Company for the quarter ended June 30, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the bes

August 1, 2024 EX-4.D1

MISSISSIPPI POWER COMPANY REGIONS BANK, FIFTH SUPPLEMENTAL INDENTURE DATED AS OF JUNE 27, 2024 SERIES 2024C 5.91% SENIOR NOTES DUE JUNE 15, 2054 TABLE OF CONTENTS1

Exhibit 4(d)1 MISSISSIPPI POWER COMPANY TO REGIONS BANK, TRUSTEE FIFTH SUPPLEMENTAL INDENTURE DATED AS OF JUNE 27, 2024 SERIES 2024C 5.

August 1, 2024 8-K

Results of Operations and Financial Condition

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) August 1, 2024 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 Del

August 1, 2024 EX-31.D1

MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(d)1 MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Anthony L.

August 1, 2024 EX-31.B1

ALABAMA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(b)1 ALABAMA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, J.

August 1, 2024 EX-31.F2

SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(f)2 SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Grace A.

August 1, 2024 EX-32.E

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(e) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Southern Power Company for the quarter ended June 30, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the be

August 1, 2024 EX-32.D

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(d) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Mississippi Power Company for the quarter ended June 30, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the

May 2, 2024 EX-31.E1

SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(e)1 SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Christopher Cummiskey, certify that: 1.

May 2, 2024 EX-32.A

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(a) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of The Southern Company for the quarter ended March 31, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the bes

May 2, 2024 EX-31.D2

MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(d)2 MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Matthew P.

May 2, 2024 EX-32.B

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(b) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Alabama Power Company for the quarter ended March 31, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the be

May 2, 2024 EX-99

Southern Company reports first-quarter 2024 earnings

Exhibit 99 Page 1 News Media Contact: Southern Company Media Relations 404-506-5333 or 1-866-506-5333 southerncompany.

May 2, 2024 EX-31.F2

SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(f)2 SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Grace A.

May 2, 2024 EX-31.A1

THE SOUTHERN COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(a)1 THE SOUTHERN COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Christopher C.

May 2, 2024 EX-31.D1

MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(d)1 MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Anthony L.

May 2, 2024 EX-4.D1

MISSISSIPPI POWER COMPANY REGIONS BANK, THIRD SUPPLEMENTAL INDENTURE DATED AS OF MARCH 27, 2024 SERIES 2024A 5.62% SENIOR NOTES DUE MARCH 15, 2034 TABLE OF CONTENTS1

Exhibit 4(d)1 MISSISSIPPI POWER COMPANY TO REGIONS BANK, TRUSTEE THIRD SUPPLEMENTAL INDENTURE DATED AS OF MARCH 27, 2024 SERIES 2024A 5.

May 2, 2024 EX-32.E

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(e) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Southern Power Company for the quarter ended March 31, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the b

May 2, 2024 EX-31.C1

GEORGIA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(c)1 GEORGIA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Kimberly S.

May 2, 2024 EX-31.F1

SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(f)1 SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, James Y.

May 2, 2024 EX-4.D2

MISSISSIPPI POWER COMPANY REGIONS BANK, FOURTH SUPPLEMENTAL INDENTURE DATED AS OF MARCH 27, 2024 SERIES 2024B 5.72% SENIOR NOTES DUE MARCH 15, 2036 TABLE OF CONTENTS1

Exhibit 4(d)2 MISSISSIPPI POWER COMPANY TO REGIONS BANK, TRUSTEE FOURTH SUPPLEMENTAL INDENTURE DATED AS OF MARCH 27, 2024 SERIES 2024B 5.

May 2, 2024 EX-31.B2

ALABAMA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(b)2 ALABAMA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Moses H.

May 2, 2024 EX-31.C2

GEORGIA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(c)2 GEORGIA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Aaron P.

May 2, 2024 EX-31.E2

SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(e)2 SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Gary Kerr, certify that: 1.

May 2, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 ☐ TRANSITION REPORT PURSUANT TO

Table of Contents Index to Financial Statements UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

May 2, 2024 8-K

Results of Operations and Financial Condition

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) May 2, 2024 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 Delawa

May 2, 2024 EX-32.C

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(c) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Georgia Power Company for the quarter ended March 31, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the be

May 2, 2024 EX-32.F

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(f) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Southern Company Gas for the quarter ended March 31, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the bes

May 2, 2024 EX-31.B1

ALABAMA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(b)1 ALABAMA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, J.

May 2, 2024 EX-32.D

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(d) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Mississippi Power Company for the quarter ended March 31, 2024, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to th

May 2, 2024 EX-31.A2

THE SOUTHERN COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(a)2 THE SOUTHERN COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Daniel S.

February 15, 2024 EX-99.05

Southern Company

Exhibit 99.05 Southern Company Consolidated Earnings As Reported (In Millions of Dollars) Three Months Ended December Year-To-Date December 2023 2022 Change 2023 2022 Change Retail Electric Revenues- Fuel $ 1,018 $ 1,460 $ (442) $ 4,430 $ 6,402 $ (1,972) Non-Fuel 2,728 2,374 354 11,913 11,795 118 Wholesale Electric Revenues 537 843 (306) 2,467 3,641 (1,174) Other Electric Revenues 190 193 (3) 792

February 15, 2024 EX-24.B1

January 26, 2024

Exhibit 24(b)1 600 North 18th Street Post Office Box 2641 Birmingham, Alabama 35291-0001 Tel 205 257 1000 January 26, 2024 Daniel S.

February 15, 2024 EX-31.B2

ALABAMA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(b)2 ALABAMA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Moses H.

February 15, 2024 EX-32.F

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(f) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Annual Report on Form 10-K of Southern Company Gas for the year ended December 31, 2023, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best o

February 15, 2024 EX-24.E1

November 27, 2023

Exhibit 24(e)1 November 27, 2023 Mr. Gary Kerr Southern Power Company 3535 Colonnade Parkway Birmingham, AL 35243 Mr. D. Matt Madison Southern Power Company 3535 Colonnade Parkway Birmingham, AL 35243 Ms. Melissa K. Caen Southern Company Services, Inc. 30 Ivan Allen Jr. Blvd, NW Atlanta, GA 30308 Mr. Kerr, Mr. Madison and Ms. Caen: Southern Power Company (the “Company”) proposes to file or join in

February 15, 2024 EX-31.F2

SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(f)2 SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Grace A.

February 15, 2024 EX-24.C1

- 2 -

Exhibit 24(c)1 November 15, 2023 Aaron P. Abramovitz, Daniel S. Tucker and Melissa K. Caen Gentlemen and Ms. Caen: Georgia Power Company (the “Company”) proposes to file or join in the filing of reports under the Securities Exchange Act of 1934, as amended, with the Securities and Exchange Commission with respect to the following: (1) the Company’s Annual Report on Form 10-K for the year ended Dec

February 15, 2024 EX-97.A

The Southern Company and Covered Subsidiaries Compensation Recoupment Policy Effective December 1, 2023

Exhibit 97(a) The Southern Company and Covered Subsidiaries Compensation Recoupment Policy Effective December 1, 2023 Purpose As required pursuant to the listing standards of the Stock Exchange (as defined below), Section 10D of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and Rule 10D-1 under the Exchange Act, each of The Southern Company (“Southern”) and Southern’s subsi

February 15, 2024 EX-24.F1

James Y. Kerr II Chairman, President and Chief Executive Officer

Exhibit 24(f)1 December 12, 2023 Myra C. Bierria and Melissa K. Caen Ms. Bierria and Ms. Caen: Southern Company Gas (the “Company”) proposes to file or join in the filing of reports under the Securities Exchange Act of 1934, as amended, with the Securities and Exchange Commission with respect to the following: (1) the Company’s Annual Report on Form 10-K for the year ended December 31, 2023 and (2

February 15, 2024 EX-31.E2

SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(e)2 SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Gary Kerr, certify that: 1.

February 15, 2024 EX-23.C1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 23(c)1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement No.

February 15, 2024 EX-23.B1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 23(b)1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement No.

February 15, 2024 EX-32.D

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(d) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Annual Report on Form 10-K of Mississippi Power Company for the year ended December 31, 2023, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the b

February 15, 2024 EX-32.A

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(a) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Annual Report on Form 10-K of The Southern Company for the year ended December 31, 2023, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best o

February 15, 2024 EX-31.E1

SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(e)1 SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Christopher Cummiskey, certify that: 1.

February 15, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2023 ☐ TRANSITION REPORT PURSUANT TO SECTI

Table of Contents Index to Financial Statements UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

February 15, 2024 EX-31.D1

MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(d)1 MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Anthony L.

February 15, 2024 EX-24.D1

October 16, 2023

Exhibit 24(d)1 October 16, 2023 Mr. Daniel S. Tucker The Southern Company 30 Ivan Allen Jr. Blvd., NW Atlanta, GA 30308 Ms. Melissa K. Caen Southern Company Services, Inc. 30 Ivan Allen Jr. Blvd., NW Atlanta, GA 30308 Mr. Tucker and Ms. Caen: Mississippi Power Company (the “Company”) proposes to file or join in the filing of reports under the Securities Exchange Act of 1934, as amended, with the S

February 15, 2024 EX-23.F1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 23(f)1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement No.

February 15, 2024 EX-99.06

Southern Company

Exhibit 99.06 Southern Company Kilowatt-Hour Sales and Customers (In Millions of KWHs) Three Months Ended December Year-To-Date December 2023 2022 Change Weather Adjusted Change 2023 2022 Change Weather Adjusted Change Kilowatt-Hour Sales- Total Sales 45,351 47,398 (4.3) % 195,507 204,273 (4.3) % Total Retail Sales- 33,817 34,264 (1.3) % (0.3) % 144,531 147,981 (2.3) % (0.4) % Residential 10,622 1

February 15, 2024 EX-31.B1

ALABAMA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(b)1 ALABAMA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, J.

February 15, 2024 EX-31.F1

SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(f)1 SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, James Y.

February 15, 2024 EX-99.02

Southern Company Financial Highlights

Exhibit 99.02 Page 1 Southern Company Financial Highlights (In Millions of Dollars Except Earnings Per Share) Three Months Ended December Year-To-Date December Net Income (Loss)–As Reported (See Notes) 2023 2022 2023 2022 Traditional Electric Operating Companies $ 785 $ 62 $ 3,637 $ 3,318 Southern Power 69 89 357 354 Southern Company Gas 140 56 615 572 Total 994 207 4,609 4,244 Parent Company and

February 15, 2024 EX-32.B

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(b) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Annual Report on Form 10-K of Alabama Power Company for the year ended December 31, 2023, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best

February 15, 2024 EX-31.C1

GEORGIA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(c)1 GEORGIA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Kimberly S.

February 15, 2024 EX-31.A1

THE SOUTHERN COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(a)1 THE SOUTHERN COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Christopher C.

February 15, 2024 EX-23.A1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 23(a)1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement Nos.

February 15, 2024 EX-10.A17

EIGHTH AMENDMENT TO THE SOUTHERN COMPANY EMPLOYEE SAVINGS PLAN

Exhibit 10(a)17 EIGHTH AMENDMENT TO THE SOUTHERN COMPANY EMPLOYEE SAVINGS PLAN WHEREAS, Southern Company Services, Inc.

February 15, 2024 EX-32.C

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(c) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Annual Report on Form 10-K of Georgia Power Company for the year ended December 31, 2023, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best

February 15, 2024 EX-31.D2

MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(d)2 MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Matthew P.

February 15, 2024 EX-23.E1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 23(e)1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement No.

February 15, 2024 EX-23.D1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 23(d)1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement No.

February 15, 2024 8-K

Results of Operations and Financial Condition

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) February 15, 2024 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

February 15, 2024 EX-10.A19

CONSULTING AGREEMENT

Exhibit 10(a)19 CONSULTING AGREEMENT This CONSULTING AGREEMENT (“Agreement”) is made and entered into as of December 13, 2023 by and between Southern Company Services, Inc.

February 15, 2024 EX-99.03

Southern Company Significant Factors Impacting EPS

Exhibit 99.03 Page 1 Southern Company Significant Factors Impacting EPS Three Months Ended December Year-To-Date December 2023 2022 Change 2023 2022 Change Earnings (Loss) Per Share– As Reported1 (See Notes) $ 0.78 $ (0.08) $ 0.86 $ 3.64 $ 3.28 $ 0.36 Significant Factors: Traditional Electric Operating Companies $ 0.66 $ 0.30 Southern Power (0.02) — Southern Company Gas 0.08 0.04 Parent Company an

February 15, 2024 EX-99.07

Southern Company

Exhibit 99.07 Southern Company Financial Overview As Reported (In Millions of Dollars) Three Months Ended December Year-To-Date December 2023 2022 % Change 2023 2022 % Change Southern Company – Operating Revenues $ 6,045 $ 7,047 (14.2) % $ 25,253 $ 29,279 (13.8) % Earnings (Loss) Before Income Taxes 800 (234) N/M 4,345 4,223 2.9 % Net Income (Loss) Available to Common 855 (87) N/M 3,976 3,524 12.8

February 15, 2024 EX-23.F2

Consent of Independent Registered Public Accounting Firm

Exhibit 23(f)2 Consent of Independent Registered Public Accounting Firm We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No.

February 15, 2024 EX-99.04

Three Months Ended December 2023 vs. 2022

Exhibit 99.04 Page 1 Southern Company EPS Earnings Analysis Description Three Months Ended December 2023 vs. 2022 Year-To-Date December 2023 vs. 2022 Retail Sales —¢ (2)¢ Retail Revenue Impacts 26 30 Weather (2) (16) Wholesale & Other Operating Revenues 1 10 Non-Fuel O&M(*) 20 35 Depreciation and Amortization (15) (59) Interest Expense and Other (2) (10) Income Taxes 9 25 Total Traditional Electri

February 15, 2024 EX-21.A

Subsidiaries of the Registrant(1)

Exhibit 21(a) Subsidiaries of the Registrant(1) Name of Company Jurisdiction of Organization The Southern Company Delaware Alabama Power Company Alabama Alabama Property Company Alabama Southern Electric Generating Company Alabama Georgia Power Company Georgia Piedmont-Forrest Corporation Georgia Southern Electric Generating Company Alabama Mississippi Power Company Mississippi Southern Power Comp

February 15, 2024 EX-32.E

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(e) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Annual Report on Form 10-K of Southern Power Company for the year ended December 31, 2023, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best

February 15, 2024 EX-31.C2

GEORGIA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(c)2 GEORGIA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Aaron P.

February 15, 2024 EX-31.A2

THE SOUTHERN COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(a)2 THE SOUTHERN COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Daniel S.

February 15, 2024 EX-24.A1

Christopher C. Womack President and Chief Executive Officer

Exhibit 24(a)1 December 11, 2023 Myra C. Bierria and Melissa K. Caen Ms. Bierria and Ms. Caen: The Southern Company (the “Company”) proposes to file or join in the filing of reports under the Securities Exchange Act of 1934, as amended, with the Securities and Exchange Commission with respect to the following: (1) the Company’s Annual Report on Form 10-K for the year ended December 31, 2023 and (2

February 15, 2024 EX-99.01

Southern Company reports fourth-quarter and full-year 2023 earnings

Exhibit 99.01 News Media Contact: Southern Company Media Relations 404-506-5333 or 1-866-506-5333 www.southerncompany.com Investor Relations Contact: Scott Gammill 404-506-0901 [email protected] February 15, 2024 Southern Company reports fourth-quarter and full-year 2023 earnings ATLANTA – Southern Company today reported fourth-quarter earnings of $855 million, or 78 cents per share, in 2023

November 20, 2023 8-K

Other Events

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) November 16, 2023 Commission File Number Registrant, State of Incorporation, Address and Telephone Number I.R.S. Employer Identification No. 1-14174 Southern Company Gas 58-2210952 (A

November 2, 2023 EX-31.B2

ALABAMA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(b)2 ALABAMA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Moses H.

November 2, 2023 EX-99.01

Southern Company reports third-quarter 2023 earnings

Exhibit 99.01 News Media Contact: Southern Company Media Relations 404-506-5333 or 1-866-506-5333 www.southerncompany.com Investor Relations Contact: Scott Gammill 404-506-0901 [email protected] November 2, 2023 Southern Company reports third-quarter 2023 earnings ATLANTA – Southern Company today reported third-quarter earnings of $1.4 billion, or $1.30 per share, in 2023 compared with earni

November 2, 2023 EX-3.B1

ALABAMA POWER COMPANY AMENDED AND RESTATED ARTICLE I NAME, DURATION, PURPOSE AND LOCATION OF CORPORATION

Exhibit 3(b)1 ALABAMA POWER COMPANY AMENDED AND RESTATED BY-LAWS ARTICLE I NAME, DURATION, PURPOSE AND LOCATION OF CORPORATION Section 1.

November 2, 2023 EX-32.D

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(d) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Mississippi Power Company for the quarter ended September 30, 2023, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, t

November 2, 2023 EX-32.C

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(c) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Georgia Power Company for the quarter ended September 30, 2023, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to th

November 2, 2023 EX-31.C2

GEORGIA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(c)2 GEORGIA POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Aaron P.

November 2, 2023 EX-31.E2

SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(e)2 SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Gary Kerr, certify that: 1.

November 2, 2023 EX-32.B

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(b) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Alabama Power Company for the quarter ended September 30, 2023, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to th

November 2, 2023 EX-99.06

Southern Company

Exhibit 99.06 Southern Company Kilowatt-Hour Sales and Customers (In Millions of KWHs) Three Months Ended September Year-To-Date September 2023 2022 Change Weather Adjusted Change 2023 2022 Change Weather Adjusted Change Kilowatt-Hour Sales- Total Sales 55,428 56,606 (2.1) % 150,157 156,874 (4.3) % Total Retail Sales- 42,364 41,490 2.1 % (0.9) % 110,715 113,716 (2.6) % (0.4) % Residential 15,133 1

November 2, 2023 EX-99.07

Southern Company

Exhibit 99.07 Southern Company Financial Overview As Reported (In Millions of Dollars) Three Months Ended September Year-To-Date September 2023 2022 % Change 2023 2022 % Change Southern Company – Operating Revenues $ 6,980 $ 8,378 (16.7) % $ 19,208 $ 22,232 (13.6) % Earnings Before Income Taxes 1,729 1,901 (9.0) % 3,545 4,457 (20.5) % Net Income Available to Common 1,422 1,472 (3.4) % 3,121 3,611

November 2, 2023 EX-4.F3

Supplemental Indenture Made as of July 11, 2023, to be Effective July 31, 2023 ____________________ Northern Illinois Gas Company to U.S. Bank Trust Company, National Association Trustee under Indenture dated as of January 1, 1954 Supplemental Indent

Exhibit 4(f)3 When recorded return to: Michael M. Roth, Esq. Ice Miller LLP 2300 Cabot Drive Suite 455 Lisle, IL 60532 Space Above this Line Reserved for Recorder’s Use Only Supplemental Indenture Made as of July 11, 2023, to be Effective July 31, 2023 Northern Illinois Gas Company to U.S. Bank Trust Company, National Association Trustee under Indenture dated as of January 1, 1954 and Supplemental

November 2, 2023 EX-31.F1

SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(f)1 SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, James Y.

November 2, 2023 EX-31.E1

SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(e)1 SOUTHERN POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Christopher Cummiskey, certify that: 1.

November 2, 2023 EX-31.F2

SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(f)2 SOUTHERN COMPANY GAS CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Grace A.

November 2, 2023 EX-31.A1

THE SOUTHERN COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(a)1 THE SOUTHERN COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Christopher C.

November 2, 2023 EX-32.F

CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32(f) CERTIFICATION 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the accompanying Quarterly Report on Form 10-Q of Southern Company Gas for the quarter ended September 30, 2023, we, the undersigned, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the

November 2, 2023 EX-99.03

Southern Company Significant Factors Impacting EPS

Exhibit 99.03 Page 1 Southern Company Significant Factors Impacting EPS Three Months Ended September Year-To-Date September 2023 2022 Change 2023 2022 Change Earnings Per Share– As Reported1 (See Notes) $ 1.30 $ 1.36 $ (0.06) $ 2.86 $ 3.38 $ (0.52) Significant Factors: Traditional Electric Operating Companies $ (0.02) $ (0.38) Southern Power — 0.02 Southern Company Gas — (0.04) Parent Company and

November 2, 2023 EX-99.02

Southern Company Financial Highlights

Exhibit 99.02 Page 1 Southern Company Financial Highlights (In Millions of Dollars Except Earnings Per Share) Three Months Ended September Year-To-Date September Net Income–As Reported (See Notes) 2023 2022 2023 2022 Traditional Electric Operating Companies $ 1,419 $ 1,445 $ 2,852 $ 3,256 Southern Power 100 95 288 265 Southern Company Gas 82 83 475 516 Total 1,601 1,623 3,615 4,037 Parent Company

November 2, 2023 EX-31.D2

MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(d)2 MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Matthew P.

November 2, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 ☐ TRANSITION REPORT PURSUANT

Table of Contents Index to Financial Statements UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

November 2, 2023 EX-99.04

Three Months Ended September 2023 vs. 2022

Exhibit 99.04 Page 1 Southern Company EPS Earnings Analysis Description Three Months Ended September 2023 vs. 2022 Year-To-Date September 2023 vs. 2022 Retail Sales (2)¢ (3)¢ Retail Revenue Impacts 5 4 Weather 9 (14) Wholesale & Other Operating Revenues 3 9 Non-Fuel O&M(*) 7 15 Depreciation and Amortization (15) (44) Interest Expense and Other (1) (7) Income Taxes 7 15 Total Traditional Electric O

November 2, 2023 8-K

Results of Operations and Financial Condition

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) November 2, 2023 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 D

November 2, 2023 EX-31.A2

THE SOUTHERN COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 31(a)2 THE SOUTHERN COMPANY CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Daniel S.

November 2, 2023 EX-31.C1

GEORGIA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(c)1 GEORGIA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Kimberly S.

November 2, 2023 EX-31.D1

MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(d)1 MISSISSIPPI POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Anthony L.

November 2, 2023 EX-99.05

Southern Company

Exhibit 99.05 Southern Company Consolidated Earnings As Reported (In Millions of Dollars) Three Months Ended September Year-To-Date September 2023 2022 Change 2023 2022 Change Retail Electric Revenues- Fuel $ 1,356 $ 2,320 $ (964) $ 3,412 $ 4,942 $ (1,530) Non-Fuel 3,783 3,641 142 9,185 9,421 (236) Wholesale Electric Revenues 727 1,197 (470) 1,930 2,798 (868) Other Electric Revenues 203 185 18 602

November 2, 2023 EX-31.B1

ALABAMA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 31(b)1 ALABAMA POWER COMPANY CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, J.

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