{"url_path":"/sec/cik-0001004155/10-k/2026/item-16","section_key":"item-16","section_title":"Item 16 FORM 10-K SUMMARY","topic":"sec","document":{"doc_type":"10-K","doc_date":"2026-02-19","source_url":"https://www.sec.gov/Archives/edgar/data/1004155/0000092122-26-000006-index.html","accession_number":"0000092122-26-000006","cik":"0001004155","ticker":null,"issuer_name":"SOUTHERN CO GAS","edgar_url":"https://www.sec.gov/Archives/edgar/data/1004155/0000092122-26-000006-index.html","primary_entity_key":"0001004155","primary_entity_name":"SOUTHERN CO GAS"},"word_count":8531,"has_tables":true,"body_markdown":"Item 16.FORM 10-K SUMMARY\n\nNone.\n\nIV-1\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\nSCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS\n\nFOR THE YEARS ENDED DECEMBER 31, 2025, 2024, AND 2023\n\nAdditions\n\nDescriptionBalance at Beginning of PeriodCharged to IncomeCharged to Other Accounts\nDeductions(*)\nBalance at End of Period\n\n(in millions)\n\nProvision for uncollectible accounts:\n\nSouthern Company\n\n2025$74 $127 $7 $124 $84 \n\n202468 119 (1)112 74 \n\n202371 87 3 93 68 \n\nAlabama Power\n\n2025$22 $22 $— $21 $23 \n\n202416 26 — 20 22 \n\n202314 16 — 14 16 \n\nGeorgia Power\n\n2025$15 $52 $— $60 $7 \n\n20244 51 — 40 15 \n\n20233 26 — 25 4 \n\nMississippi Power\n\n2025$1 $2 $— $2 $1 \n\n20241 2 — 2 1 \n\n20231 2 — 2 1 \n\nSouthern Power\n\n2025$— $— $— $— $— \n\n20241 (1)— — — \n\n20231 — — — 1 \n\nSouthern Company Gas\n\n2025$33 $50 $7 $40 $50 \n\n202444 39 (1)49 33 \n\n202350 43 3 52 44 \n\n(*)Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.\n\nIV-2\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\nSCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS (CONTINUED)\n\nFOR THE YEARS ENDED DECEMBER 31, 2025, 2024, AND 2023\n\nAdditions\n\nDescriptionBalance at Beginning of PeriodCharged to IncomeCharged to Other AccountsDeductionsBalance at End of Period\n\n(in millions)\n\nTax valuation allowance (net state):\n\nSouthern Company(a)(b)(c)\n\n2025$268 $128 $— $39 $357 \n\n2024168 97 3 — 268 \n\n2023207 (14)(25)— 168 \n\nGeorgia Power(b)\n\n2025$124 $126 $— $39 $211 \n\n202460 97 (33)— 124 \n\n202398 (15)(23)— 60 \n\nMississippi Power(c)\n\n2025$32 $— $— $— $32 \n\n202432 — — — 32 \n\n202332 — — — 32 \n\nSouthern Power(c)\n\n2025$21 $2 $— $— $23 \n\n202421 — — — 21 \n\n202321 — — — 21 \n\nSouthern Company Gas(c)\n\n2025$4 $— $— $— $4 \n\n20245 — (1)— 4 \n\n20237 — (2)— 5 \n\n(a)In 2024, Southern Company established a valuation allowance for certain Georgia state tax credits expected to expire prior to being fully utilized.\n\n(b)In 2018, Georgia Power established a valuation allowance for certain Georgia state tax credits expected to expire prior to being fully utilized, which has been adjusted in subsequent years as a result of changes in projected state taxable income.\n\n(c)Associated with a state net operating loss carryforward expected to expire prior to being fully utilized.\n\nSee Note 10 to the financial statements in Item 8 herein for additional information.\n\nIV-3\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\nEXHIBIT INDEX\n\nThe exhibits below with an asterisk (*) preceding the exhibit number are filed herewith. The remaining exhibits have previously been filed with the SEC and are incorporated herein by reference. The exhibits marked with a pound sign (#) are management contracts or compensatory plans or arrangements required to be identified as such by Item 15 of Form 10-K.\n\n(3)Articles of Incorporation and By-Laws\n\nSouthern Company\n\n(a)1—\nRestated Certificate of Incorporation of Southern Company and amendments thereto through May 27, 2025. ([Designated in](https://www.sec.gov/Archives/edgar/data/3153/000009212219000006/ex3a1_2018x10k.htm)[Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 3(a)1](https://www.sec.gov/Archives/edgar/data/3153/000009212219000006/ex3a1_2018x10k.htm) and in[Form 8-K dated May 21, 2025. File No. 1-3526, as Exhibit 3.1](https://www.sec.gov/Archives/edgar/data/92122/000009212225000059/ex3-1sorestatedcertificate.htm)[.](https://www.sec.gov/Archives/edgar/data/92122/000009212225000059/ex3-1sorestatedcertificate.htm))\n\n(a)2—\nAmended and Restated By-laws of Southern Company effective December 12, 2022, and as presently in effect. [(Designated in Form 8-K dated December 12, 2022, File No. 1-3526, as Exhibit 3.1.)](https://www.sec.gov/Archives/edgar/data/92122/000009212222000071/ex3-1sobylaw8xk.htm)\n\nAlabama Power\n\n(b)1—\nCharter of Alabama Power and amendments thereto through September 7, 2017. (Designated in Registration Nos. 2-59634 as Exhibit 2(b), 2-60209 as Exhibit 2(c), 2-60484 as Exhibit 2(b), 2-70838 as Exhibit 4(a)-2, 2-85987 as Exhibit 4(a)-2, 33-25539 as Exhibit 4(a)-2, 33-43917 as Exhibit 4(a)-2, in Form 8-K dated February 5, 1992, File No. 1-3164, as Exhibit 4(b)-3, in Form 8-K dated July 8, 1992, File No. 1-3164, as Exhibit 4(b)-3, in Form 8-K dated October 27, 1993, File No. 1-3164, as Exhibits 4(a) and 4(b), in Form 8-K dated November 16, 1993, File No. 1-3164, as Exhibit 4(a), in Certificate of Notification, File No. 70-8191, as Exhibit A, in [Form 10-K for the year ended December 31, 1997, File No. 1-3164, as Exhibit 3(b)2](https://www.sec.gov/Archives/edgar/data/3153/0000092122-98-000058.txt), in [Form 8-K dated August 10, 1998, File No. 1-3164, as Exhibit 4.4](https://www.sec.gov/Archives/edgar/data/3153/0000003153-98-000026.txt), in [Form 10-K for the year ended December 31, 2000, File No. 1-3164, as Exhibit 3(b)2](https://www.sec.gov/Archives/edgar/data/3153/000009212201500065/x3b2.txt), in [Form 10-K for the year ended December 31, 2001, File No. 1-3164, as Exhibit 3(b)2](https://www.sec.gov/Archives/edgar/data/3153/000009212202000045/x3b2.txt), in [Form 8-K dated February 5, 2003, File No. 1-3164, as Exhibit 4.4](https://www.sec.gov/Archives/edgar/data/3153/000000315303000003/ex4-4.txt), in [Form 10-Q for the quarter ended March 31, 2003, File No 1-3164, as Exhibit 3(b)1](https://www.sec.gov/Archives/edgar/data/3153/000009212203000099/x3b1.txt), in [Form 8-K dated February 5, 2004, File No. 1-3164, as Exhibit 4.4](https://www.sec.gov/Archives/edgar/data/3153/000000315304000009/x4_4.txt), in [Form 10-Q for the quarter ended March 31, 2006, File No. 1-3164, as Exhibit 3(b)(1)](https://www.sec.gov/Archives/edgar/data/3153/000009212206000228/x3b1.htm), in [Form 8-K dated December 5, 2006, File No. 1-3164, as Exhibit 4](https://www.sec.gov/Archives/edgar/data/3153/000009212206000311/x4-5.htm)[.5](https://www.sec.gov/Archives/edgar/data/3153/000009212206000311/x4-5.htm)[,](https://www.sec.gov/Archives/edgar/data/3153/000009212206000311/x4-5.htm) in [Form 8-K dated September 12, 2007, File No. 1-3164, as Exhibit 4.5](https://www.sec.gov/Archives/edgar/data/3153/000009212207000080/x4-5.htm), in [Form 8-K dated October 17, 2007, File No. 1-3164, as Exhibit 4.5](https://www.sec.gov/Archives/edgar/data/3153/000009212207000097/x4-5.htm), in [Form 10-Q for the quarter ended March 31, 2008, File No. 1-3164, as Exhibit 3(b)1](https://www.sec.gov/Archives/edgar/data/3153/000009212208000032/x3b1.htm), and in [Form 8-K dated September 5, 2017, File No. 1-3164, as Exhibit 4.](https://www.sec.gov/Archives/edgar/data/3153/000000315317000024/ala8kex4-5_2017preferred.htm)[5](https://www.sec.gov/Archives/edgar/data/3153/000000315317000024/ala8kex4-5_2017preferred.htm).)\n\n(b)2—\nAmended and Restated By-laws of Alabama Power effective October 16, 2023, and as presently in effect. ([Designated in Form 10-Q for the quarter ended September 30, 2023, File No 1-3164, as Exhibit 3(b)1](https://www.sec.gov/Archives/edgar/data/92122/000009212223000101/ex3-b1apcbylawsxrevised10x.htm).)\n\nGeorgia Power\n\n(c)1—\nCharter of Georgia Power and amendments thereto through October 9, 2007. (Designated in Registration Nos. 2-63392 as Exhibit 2(a)-2, 2-78913 as Exhibits 4(a)-(2) and 4(a)-(3), 2-93039 as Exhibit 4(a)-(2), 2-96810 as Exhibit 4(a)-2, 33-141 as Exhibit 4(a)-(2), 33-1359 as Exhibit 4(a)(2), 33-5405 as Exhibit 4(b)(2), 33-14367 as Exhibits 4(b)-(2) and 4(b)-(3), 33-22504 as Exhibits 4(b)-(2), 4(b)-(3) and 4(b)-(4), in Form 10-K for the year ended December 31, 1991, File No. 1-6468, as Exhibits 4(a)(2) and 4(a)(3), in Registration No. 33-48895 as Exhibits 4(b)-(2) and 4(b)-(3), in Form 8-K dated December 10, 1992, File No. 1-6468 as Exhibit 4(b), in Form 8-K dated June 17, 1993, File No. 1-6468, as Exhibit 4(b), in Form 8-K dated October 20, 1993, File No. 1-6468, as Exhibit 4(b), in[Form 10-K for the year ended December 31, 1997, File No. 1-6468, as Exhibit 3(c)2](https://www.sec.gov/Archives/edgar/data/3153/0000092122-98-000058.txt), in [Form 10-K for the year ended December 31, 2000, File No. 1-6468, as Exhibit 3(c)2](https://www.sec.gov/Archives/edgar/data/3153/000009212201500065/x3c2.txt), in [Form 8-K dated June 27, 2006, File No. 1-6468, as Exhibit 3.1](https://www.sec.gov/Archives/edgar/data/41091/000009212206000285/x3-1edg.htm), and in [Form 8-K dated October 3, 2007, File No. 1-6468, as Exhibit 4.5](https://www.sec.gov/Archives/edgar/data/41091/000009212207000088/x4-5.htm).)\n\n(c)2—\nBy-laws of Georgia Power as amended effective November 9, 2016, and as presently in effect.[(Designated in Form 8-K dated November 9, 2016, File No. 1-6468, as Exhibit 3.1.)](https://www.sec.gov/Archives/edgar/data/41091/000004109116000041/ga8kbylawamend11-16ex3x1.htm)\n\nMississippi Power\n\n(d)1—\nAmended and Restated Articles of Incorporation of Mississippi Power dated July 22, 2020. ([Designated in Form 10-Q for the quarter ended June 30, 2020, File No. 001-11229, as Exhibit 3(d)1.](https://www.sec.gov/Archives/edgar/data/3153/000009212220000057/x3d1-q22020.htm))\n\n(d)2—\nBy-laws of Mississippi Power as amended effective July 22, 2020, and as presently in effect. ([Designated in Form 10-Q for the quarter ended June 30, 2020, File No. 001-11229, as Exhibit 3(d)2](https://www.sec.gov/Archives/edgar/data/3153/000009212220000057/x3d2-q22020.htm).)\n\nE-1\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\nSouthern Power\n\n(e)1—\nCertificate of Incorporation of Southern Power Company dated January 8, 2001. [(Designated in Registration No. 333-98553 as Exhibit 3.1.)](https://www.sec.gov/Archives/edgar/data/1160661/000116066102000001/ex3-1.txt)\n\n(e)2—\nBy-laws of Southern Power Company effective January 8, 2001. [(Designated in Registration No. 333-98553 as Exhibit 3.2.)](https://www.sec.gov/Archives/edgar/data/1160661/000116066102000001/ex3-2.txt)\n\nSouthern Company Gas\n\n(f)1—\nAmended and Restated Articles of Incorporation of Southern Company Gas dated July 11, 2016. [(Designated in Form 8-K dated July 8, 2016, File No. 1-14174, as Exhibit 3.1.)](https://www.sec.gov/Archives/edgar/data/1004155/000100415516000194/exhibit31articlesofincorpo.htm)\n\n(f)2—\nAmended and Restated By-laws of Southern Company Gas effective October 23, 2018. [(Designated in Form 10-Q for the quarter ended June 30, 2019, File No. 1-14174, as Exhibit 3(e).)](https://www.sec.gov/Archives/edgar/data/3153/000009212219000037/ex3e-q22019.htm)\n\n(4)Instruments Describing Rights of Security Holders, Including Indentures\n\nWith respect to each of Southern Company, Alabama Power, Georgia Power, Mississippi Power, Southern Power Company, and Southern Company Gas, such Registrant has excluded certain instruments with respect to long-term debt that does not exceed 10% of the total assets of such Registrant and its subsidiaries. Each such Registrant agrees, upon request of the SEC, to furnish copies of any or all such instruments to the SEC.\n\nSouthern Company\n\n(a)1—\nSenior Note Indenture dated as of January 1, 2007, between Southern Company and Computershare Trust Company, N.A., as successor Trustee, and certain indentures supplemental thereto through November 6, 2025. (Designated in [Form 8-K dated January](https://www.sec.gov/Archives/edgar/data/92122/000009212207000006/ex4-1.txt)[11, 2007, File No.](https://www.sec.gov/Archives/edgar/data/92122/000009212207000006/ex4-1.txt)[1-3526, as Exhibit 4.1](https://www.sec.gov/Archives/edgar/data/92122/000009212207000006/ex4-1.txt), in [Form 8-K dated May 19, 2016, File No. 1-3526, as Exhibit 4.2(e)](https://www.sec.gov/Archives/edgar/data/92122/000009212216000162/x4-2eso16thsupind5x16multi.htm), in[Form 8-K dated May 19, 2016, File No. 1-3526, as Exhibit 4.2(f)](https://www.sec.gov/Archives/edgar/data/92122/000009212216000162/x4-2fso17thsupind5x16multi.htm), in [Form 8-K dated May 19, 2016, File No. 1-3526, as Exhibit 4.2(g)](https://www.sec.gov/Archives/edgar/data/92122/000009212216000162/x4-2gso18thsupind5x16multi.htm), in [Form 8-K dated April 1, 2020, File No. 1-3526, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/92122/000009212220000032/so21stsupindent2020asr.htm), in [Form 8-K dated February 23, 2021, File No. 1-3526, as Exhibit 4.4(a)](https://www.sec.gov/Archives/edgar/data/0000092122/000009212221000026/so22ndsupindent2021asrnote.htm), in [Form 8-K dated February 23, 2021, File No. 1-3526, as Exhibit 4.4(b)](https://www.sec.gov/Archives/edgar/data/0000092122/000009212221000026/so23rdsupindent2021bsrnote.htm), in [Form 8-K dated October 3, 2022, File No. 1-3526, as Exhibit 4.4(b)](https://www.sec.gov/Archives/edgar/data/92122/000009212222000061/ex4-4bso26thsupindent2022b.htm), in [Form 8-K dated May 15, 2023, File No. 1-3526, as Exhibit 4.4(a)](https://www.sec.gov/Archives/edgar/data/92122/000009212223000048/ex4-4aso28thsupindent2023b.htm), in[Form 8-K dated May 15, 2023, File No. 1-3526, as Exhibit 4.4(b)](https://www.sec.gov/Archives/edgar/data/92122/000009212223000048/ex4-4bso29thsupindent2023c.htm), in [Form 8-K dated September 5, 2023, File No. 1-3526, as Exhibit 4.4(a)](https://www.sec.gov/Archives/edgar/data/92122/000009212223000091/ex4-4aso30thsupplementalin.htm), in [Form 8-K dated September 5, 2023, File No. 1-3526, as Exhibit 4.4(b)](https://www.sec.gov/Archives/edgar/data/92122/000009212223000091/ex4-4bso31stsupplementalin.htm), in [Form 8-K dated May 9, 2024, File No. 1-3526, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/92122/000009212224000059/ex4-2southerncompany32ndsu.htm), in [Form 8-K dated September 4, 2024, File No. 1-3526, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/92122/000009212224000085/ex4-2so33rdsupplementalind.htm), in[Form 8-K dated May 20, 2025, File No. 1-3526](https://www.sec.gov/Archives/edgar/data/92122/000009212225000060/ex4-2so34thsupplementalind.htm)[,](https://www.sec.gov/Archives/edgar/data/92122/000009212225000060/ex4-2so34thsupplementalind.htm)[as Exh](https://www.sec.gov/Archives/edgar/data/92122/000009212225000060/ex4-2so34thsupplementalind.htm)[ibit 4.2](https://www.sec.gov/Archives/edgar/data/92122/000009212225000060/ex4-2so34thsupplementalind.htm), in [Form 8-K dated November 3, 2025, File No, 1-3526, as Exhibit 4.2(a)](https://www.sec.gov/Archives/edgar/data/92122/000009212225000094/ex4-2asoutherncompanyx35th.htm), and in [Form 8-K dated November 3, 2025, File No. 1-3526](https://www.sec.gov/Archives/edgar/data/92122/000009212225000094/ex4-2bsoutherncompanyx36th.htm)[,](https://www.sec.gov/Archives/edgar/data/92122/000009212225000094/ex4-2bsoutherncompanyx36th.htm)[as Exhibit 4.2(b)](https://www.sec.gov/Archives/edgar/data/92122/000009212225000094/ex4-2bsoutherncompanyx36th.htm).)\n\n(a)2—\nSubordinated Note Indenture dated as of October 1, 2015, between Southern Company and Computershare Trust Company, N.A., as successor Trustee, and certain indentures supplemental thereto through February 28, 2025. (Designated in [Form 8-K dated October 1, 2015, File No. 1-3526, as Exhibit 4.3](https://www.sec.gov/Archives/edgar/data/92122/000009212215000097/sojsn2015a8-kex4x310x15.htm), in[Form 10-Q for the quarter ended June 30, 2017, File No. 1-3526 as Exhibit 4(a)1](https://www.sec.gov/Archives/edgar/data/3153/000009212217000065/x4a1-q22017.htm), in [Form 8-K dated November 17, 2017, File No. 1-3526, as Exhibit 4.4](https://www.sec.gov/Archives/edgar/data/92122/000009212217000090/socoretailjsn5thsupind2017b.htm), in [Form 8-K dated August 13, 2019, File No. 1-3526, as Exhibit 4.4(b)](https://www.sec.gov/Archives/edgar/data/92122/000009212219000047/so8kstockunitsex4-4b.htm), in [Form 8-K dated January 6, 2020, File No. 1-3526 as Exhibit 4.4](https://www.sec.gov/Archives/edgar/data/92122/000009212220000010/socojsn8thsupind2020a.htm), in [Form 8-K dated September 15, 2020, File No. 1-3526, as Exhibit 4.4(b)](https://www.sec.gov/Archives/edgar/data/92122/000009212220000074/x4-4bsojsn10thsupind20.htm), in [Form 8-K dated May 3, 2021, File No. 1-3526, as Exhibit 4.4](https://www.sec.gov/Archives/edgar/data/0000092122/000009212221000047/sojsn11thsupind2021a.htm), in [Form 8-K dated September 13, 2021, File No. 1-3526, as Exhibit 4.4](https://www.sec.gov/Archives/edgar/data/0000092122/000009212221000079/ex4-4sojsn12thsupind2021b.htm), in [Form 8-K dated May 9, 2022, File No. 1-3526, as Exhibit 4.4(b)](https://www.sec.gov/Archives/edgar/data/92122/000009212222000024/sojsn14thsupplementalinden.htm), in [Form 8-K dated January 8, 2025, File No. 1-3526, as Exhibit 4.4](https://www.sec.gov/Archives/edgar/data/92122/000009212225000008/ex4-415thsupplementalinden.htm), and in [Form 8-K dated](https://www.sec.gov/Archives/edgar/data/92122/000009212225000028/ex4-416thsupplementalinden.htm)[February 25, 2025, File No. 1-3526](https://www.sec.gov/Archives/edgar/data/92122/000009212225000028/ex4-416thsupplementalinden.htm)[,](https://www.sec.gov/Archives/edgar/data/92122/000009212225000028/ex4-416thsupplementalinden.htm)[as Exhibit 4.4](https://www.sec.gov/Archives/edgar/data/92122/000009212225000028/ex4-416thsupplementalinden.htm).)\n\n(a)3—\nPurchase Contract and Pledge Agreement, dated as of November 6, 2025, between Southern Company and U.S. Bank Trust Company, National Association, as Purchase Contract Agent, Collateral Agent, Custodial Agent, and Securities Intermediary. (Designated in [Form 8-K dated November 3, 2025, File No. 1-3526, as Exhibit 4.9](https://www.sec.gov/Archives/edgar/data/92122/000009212225000094/ex4-9socoequityunitsxpurch.htm).)\n\n*\n(a)4—\n[Description of securities registered pursuant to Section 12 of the Securities Exchange Act of 1934, as amended](x4a4-q42025sodescriptionof.htm).\n\nE-2\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\nAlabama Power\n\n(b)1—\nSenior Note Indenture dated as of December 1, 1997, between Alabama Power and Regions Bank, as Successor Trustee, and certain indentures supplemental thereto through September 5, 2025. (Designated in [Form 8-K dated December](https://www.sec.gov/Archives/edgar/data/3153/0000003153-97-000035.txt)[4, 1997, File No.](https://www.sec.gov/Archives/edgar/data/3153/0000003153-97-000035.txt)[1-3164, as Exhibit 4.1](https://www.sec.gov/Archives/edgar/data/3153/0000003153-97-000035.txt), in [Form 8-K dated February](https://www.sec.gov/Archives/edgar/data/3153/000000315303000009/ex4-2a.txt)[11, 2003, File No.](https://www.sec.gov/Archives/edgar/data/3153/000000315303000009/ex4-2a.txt)[1-3164, as Exhibit 4.2(a)](https://www.sec.gov/Archives/edgar/data/3153/000000315303000009/ex4-2a.txt), in [Form 8-K dated March](https://www.sec.gov/Archives/edgar/data/3153/000000315303000013/ex4-1.txt)[12, 2003, File No.](https://www.sec.gov/Archives/edgar/data/3153/000000315303000013/ex4-1.txt)[1-3164, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/3153/000000315303000013/ex4-1.txt), in [Form 8-K dated May](https://www.sec.gov/Archives/edgar/data/3153/000009212208000036/exhibit42.txt)[8, 2008, File No.](https://www.sec.gov/Archives/edgar/data/3153/000009212208000036/exhibit42.txt)[1-3164, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/3153/000009212208000036/exhibit42.txt), in [Form 8-K dated February 26, 2009, File No.](https://www.sec.gov/Archives/edgar/data/3153/000009212209000020/x4-2al8k.htm)[1-3164](https://www.sec.gov/Archives/edgar/data/3153/000009212209000020/x4-2al8k.htm)[,](https://www.sec.gov/Archives/edgar/data/3153/000009212209000020/x4-2al8k.htm)[as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/3153/000009212209000020/x4-2al8k.htm), in [Form 8-K dated March](https://www.sec.gov/Archives/edgar/data/3153/000009212211000020/ex4-2.htm)[3, 2011, File No.](https://www.sec.gov/Archives/edgar/data/3153/000009212211000020/ex4-2.htm)[1-3164, as Exhibit 4.2,](https://www.sec.gov/Archives/edgar/data/3153/000009212211000020/ex4-2.htm) in [Form 8-K dated May](https://www.sec.gov/Archives/edgar/data/3153/000009212211000079/x4-2b.htm)[18, 2011, File No.](https://www.sec.gov/Archives/edgar/data/3153/000009212211000079/x4-2b.htm)[1-3164, as Exhibit 4.2(b)](https://www.sec.gov/Archives/edgar/data/3153/000009212211000079/x4-2b.htm), in [Form 8-K dated January](https://www.sec.gov/Archives/edgar/data/3153/000009212212000006/x4-2.htm)[10, 2012, File No.](https://www.sec.gov/Archives/edgar/data/3153/000009212212000006/x4-2.htm)[1-3164, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/3153/000009212212000006/x4-2.htm), in [Form 8-K dated November 27, 2012, File No. 1-3164, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/3153/000009212212000170/x4-2.htm), in [Form 8-K dated August 20, 2014, File No. 1-3164, as Exhibit 4.6,](https://www.sec.gov/Archives/edgar/data/3153/000000315314000017/apc2014a8-kex46.htm) in [Form 8-K dated March 5, 2015, File No. 1-3164, as Exhibit 4.6](https://www.sec.gov/Archives/edgar/data/3153/000000315315000008/ala2015aform8-kex46.htm), in [Form 8-K dated January 8, 2016, File No. 1-3164, as Exhibit 4.6](https://www.sec.gov/Archives/edgar/data/3153/000000315316000038/apc8k2016aex4-6.htm), in [Form 8-K dated November 2, 2017, File No. 1-3164, as Exhibit 4.6](https://www.sec.gov/Archives/edgar/data/3153/000000315317000032/apc57thsupindenture.htm), in [Form 8-K dated June 21, 2018, File No. 1-3164, as Exhibit 4.6](https://www.sec.gov/Archives/edgar/data/3153/000000315318000016/apc58thsupindenture.htm), in [Form 8-K dated September 12, 2019, File No. 1-3164, as Exhibit 4.6](https://www.sec.gov/Archives/edgar/data/3153/000000315319000019/apc59thsupindenture.htm), in [Form 8-K dated August 24, 2020, File No. 1-3164, as Exhibit 4.6](https://www.sec.gov/Archives/edgar/data/3153/000000315320000018/apc60thsupindenture.htm), in [Form 8-K dated June 7, 2021, File No. 1-3164, as Exhibit 4.6](https://www.sec.gov/Archives/edgar/data/0000003153/000000315321000014/apc61stsupindenture.htm), in [Form 8-K dated November 15, 2021, File No. 1-3164, as Exhibit 4.6](https://www.sec.gov/Archives/edgar/data/0000003153/000000315321000023/apc62ndsupindenture.htm), in [Form 8-K dated March 2, 2022, File No. 1-3164, as Exhibit 4.6](https://www.sec.gov/Archives/edgar/data/3153/000000315322000009/apc63rdsupindenture.htm), in [Form 8-K dated August 9, 2022, File No. 1-3164, as Exhibit 4.6(a)](https://www.sec.gov/Archives/edgar/data/3153/000000315322000029/ex4-6aapc64thsupindenture.htm), in [Form 8-K dated August 9, 2022, File No. 1-3164, as Exhibit 4.6(b)](https://www.sec.gov/Archives/edgar/data/3153/000000315322000029/ex4-6bapc65thsupindenture.htm), in [Form 8-K dated May 3, 2023, File No. 1-3164, as Exhibit 4.6](https://www.sec.gov/Archives/edgar/data/3153/000000315323000011/ex46apc66thsupindenture.htm), in [Form 8-K dated November 6, 2023, File No. 1-3164, as Exhibit 4.6](https://www.sec.gov/Archives/edgar/data/3153/000000315323000019/apc67thsupindenture.htm), in [F](https://www.sec.gov/Archives/edgar/data/3153/000000315325000008/ex4-6apc68thsupindenture.htm)[orm 8-K dated March 20, 2025, File No. 1-3164](https://www.sec.gov/Archives/edgar/data/3153/000000315325000008/ex4-6apc68thsupindenture.htm)[,](https://www.sec.gov/Archives/edgar/data/3153/000000315325000008/ex4-6apc68thsupindenture.htm)[as Exhibit 4.6](https://www.sec.gov/Archives/edgar/data/3153/000000315325000008/ex4-6apc68thsupindenture.htm), in [Form 8-K dated June 11, 2025, File No. 1-3164](https://www.sec.gov/Archives/edgar/data/3153/000000315325000018/ex4-6apc69thsupindenture.htm)[,](https://www.sec.gov/Archives/edgar/data/3153/000000315325000018/ex4-6apc69thsupindenture.htm)[as Exhibit 4.6](https://www.sec.gov/Archives/edgar/data/3153/000000315325000018/ex4-6apc69thsupindenture.htm), and in [F](https://www.sec.gov/Archives/edgar/data/3153/000000315325000027/ex4-6apc70thsupindenturex2.htm)[o](https://www.sec.gov/Archives/edgar/data/3153/000000315325000027/ex4-6apc70thsupindenturex2.htm)[rm 8-K dated](https://www.sec.gov/Archives/edgar/data/3153/000000315325000027/ex4-6apc70thsupindenturex2.htm)[September 2, 20](https://www.sec.gov/Archives/edgar/data/3153/000000315325000027/ex4-6apc70thsupindenturex2.htm)[2](https://www.sec.gov/Archives/edgar/data/3153/000000315325000027/ex4-6apc70thsupindenturex2.htm)[5, File No. 1-3164](https://www.sec.gov/Archives/edgar/data/3153/000000315325000027/ex4-6apc70thsupindenturex2.htm)[,](https://www.sec.gov/Archives/edgar/data/3153/000000315325000027/ex4-6apc70thsupindenturex2.htm)[as Exhibit 4.6](https://www.sec.gov/Archives/edgar/data/3153/000000315325000027/ex4-6apc70thsupindenturex2.htm).)\n\nGeorgia Power\n\n(c)1—\nSenior Note Indenture dated as of January 1, 1998, between Georgia Power and Computershare Trust Company, N.A., as Successor Trustee, and certain indentures supplemental thereto through September 29, 2025. (Designated in [Form 8-K dated January 21, 1998, File No. 1-6468, as Exhibits 4.1](https://www.sec.gov/Archives/edgar/data/41091/0000041091-98-000020.txt), in [Form 8-K dated March 6, 2007, File No. 1-6468, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/41091/000009212207000024/x4-2.txt), in [Form 8-K dated February 4, 2009, File No. 1-6468, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/41091/000009212209000010/x4-2.htm), in [Form 8-K dated May 24, 2010, File No. 1-6468, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/41091/000009212210000061/x4-2.htm), in [Form 8-K dated August 26, 2010, File No. 1-6468, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/41091/000009212210000087/ex4-2.htm), in [Form 8-K dated February 29, 2012, File No. 1-6468, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/41091/000009212212000045/x4-2.htm), in [Form 8-K dated March 12, 2013, File No. 1-6468, as Exhibit 4.2(a)](https://www.sec.gov/Archives/edgar/data/41091/000004109113000016/ex4-2aga2013ab8xk.htm), in [Form 8-K dated March 2, 2016, File No. 1-6468, as Exhibit 4.2(a)](https://www.sec.gov/Archives/edgar/data/41091/000004109116000033/ex4-2aga8k2016a2016b.htm), in [Form 8-K dated February 28, 2017, File No. 1-6468, as Exhibit 4.2(b)](https://www.sec.gov/Archives/edgar/data/41091/000004109117000014/ga57thsupindenture2017b3-17.htm), in[Form 8-K dated September 4, 2019, File No. 1-6468, as Exhibit 4.2(](https://www.sec.gov/Archives/edgar/data/41091/000004109119000019/ga60thsupindenture2019.htm)[b](https://www.sec.gov/Archives/edgar/data/41091/000004109119000019/ga60thsupindenture2019.htm)[)](https://www.sec.gov/Archives/edgar/data/41091/000004109119000019/ga60thsupindenture2019.htm), in [Form 8-K dated January 8, 2020, File No. 1-6468, as Exhibit 4.2(c)](https://www.sec.gov/Archives/edgar/data/41091/000004109120000020/ex4-2cga62ndsupindentu.htm), in [Form 8-K dated February 22, 2021, File No. 1-6468, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/0000041091/000004109121000010/ga63rdsupindenture.htm) in [Form 8-K dated May 2, 2022, File No. 1-6468, as Exhibit 4.2(a)](https://www.sec.gov/Archives/edgar/data/41091/000004109122000017/ga64thsupindenture.htm), in [Form 8-K dated May 2, 2022, File No. 1-6468, as Exhibit 4.2(b)](https://www.sec.gov/Archives/edgar/data/41091/000004109122000017/ga65thsupindenture.htm), in [Form 8-K dated May 1, 2023, File No. 1-6468, as Exhibit 4.2(a)](https://www.sec.gov/Archives/edgar/data/41091/000004109123000018/ex4-2aga66thsupindenture.htm), in [Form 8-K dated May 1, 2023, File No. 1-6468, as Exhibit 4.2(b)](https://www.sec.gov/Archives/edgar/data/41091/000004109123000018/ex4-2bga67thsupindenture.htm), in [Form 8-K dated February 20, 2024, File No. 1-6468, as Exhibit 4.2(a)](https://www.sec.gov/Archives/edgar/data/41091/000004109124000018/ex4-2agpc69thsupplementali.htm), in [Form 8-K dated February 20, 2024, File No. 1-6468, as Exhibit 4.2(b)](https://www.sec.gov/Archives/edgar/data/41091/000004109124000018/ex4-2bgpc70thsupplementali.htm), in [Form 8-K dated November 8, 2024, File No. 1-6468, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/41091/000004109124000026/ex4-2gpc71stsupplementalin.htm), in [Form 8-K dated December 2, 2024, File No. 1-6468, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/41091/000004109124000034/ex4-2gpc72ndsupplementalin.htm), in[Form 8-K dated](https://www.sec.gov/Archives/edgar/data/41091/000004109125000022/ex4-3agpc73rdsupplementali.htm)[February 24](https://www.sec.gov/Archives/edgar/data/41091/000004109125000022/ex4-3agpc73rdsupplementali.htm)[, 2025, File No. 1-6468, as Exhibit 4.3(a)](https://www.sec.gov/Archives/edgar/data/41091/000004109125000022/ex4-3agpc73rdsupplementali.htm), in [Form 8-K dated](https://www.sec.gov/Archives/edgar/data/41091/000004109125000022/ex4-3bgpc74thsupplementali.htm)[February 24](https://www.sec.gov/Archives/edgar/data/41091/000004109125000022/ex4-3bgpc74thsupplementali.htm)[, 2025, File No. 1-6468, as Exhibit 4.3(](https://www.sec.gov/Archives/edgar/data/41091/000004109125000022/ex4-3bgpc74thsupplementali.htm)[b](https://www.sec.gov/Archives/edgar/data/41091/000004109125000022/ex4-3bgpc74thsupplementali.htm)[)](https://www.sec.gov/Archives/edgar/data/41091/000004109125000022/ex4-3bgpc74thsupplementali.htm), in [Form 8-K dated](https://www.sec.gov/Archives/edgar/data/41091/000004109125000022/ex4-3cgpc75thsupplementali.htm)[February 24](https://www.sec.gov/Archives/edgar/data/41091/000004109125000022/ex4-3cgpc75thsupplementali.htm)[, 2025, File No. 1-6468, as Exhibit 4.3(](https://www.sec.gov/Archives/edgar/data/41091/000004109125000022/ex4-3cgpc75thsupplementali.htm)[c](https://www.sec.gov/Archives/edgar/data/41091/000004109125000022/ex4-3cgpc75thsupplementali.htm)[)](https://www.sec.gov/Archives/edgar/data/41091/000004109125000022/ex4-3cgpc75thsupplementali.htm), in [Form 8-K dated September 24, 2025, File No. 1-6468, as](https://www.sec.gov/Archives/edgar/data/41091/000004109125000044/ex4-3bgpc76thsupplementali.htm)[E](https://www.sec.gov/Archives/edgar/data/41091/000004109125000044/ex4-3bgpc76thsupplementali.htm)[xhibi](https://www.sec.gov/Archives/edgar/data/41091/000004109125000044/ex4-3bgpc76thsupplementali.htm)[t 4.3(](https://www.sec.gov/Archives/edgar/data/41091/000004109125000044/ex4-3bgpc76thsupplementali.htm)[b](https://www.sec.gov/Archives/edgar/data/41091/000004109125000044/ex4-3bgpc76thsupplementali.htm)[)](https://www.sec.gov/Archives/edgar/data/41091/000004109125000044/ex4-3bgpc76thsupplementali.htm), and in[Form 8-K dated September 24, 2025, File No. 1-6468, as Exhibi](https://www.sec.gov/Archives/edgar/data/41091/000004109125000044/ex4-3cgpc77thsupplementali.htm)[t 4.3(c)](https://www.sec.gov/Archives/edgar/data/41091/000004109125000044/ex4-3cgpc77thsupplementali.htm).)\n\n(c)2—\nSubordinated Note Indenture, dated as of September 1, 2017, between Georgia Power and Computershare Trust Company, N.A., as Successor Trustee, and First Supplemental Indenture thereto dated as of September 21, 2017. (Designated in [Form 8-K dated September 18, 2017, File No. 1-6468, as Exhibit 4.3](https://www.sec.gov/Archives/edgar/data/41091/000004109117000060/gasubnoteindenture9-17xfin.htm), and in [Form 8-K dated September 18, 2017, File No. 1-6468, as Exhibit 4.4](https://www.sec.gov/Archives/edgar/data/41091/000004109117000060/ga1stsupind2017ajsn-9x17.htm).)\n\n(c)3—\nAmended and Restated Loan Guarantee Agreement, dated as of March 22, 2019, between Georgia Power and the DOE. (Designated in [Form 8-K dated March 22, 2019, File No.](https://www.sec.gov/Archives/edgar/data/41091/000004109119000004/x4-1ga8xkardoeloanguarante.htm)[1-6468, as Exhibit](https://www.sec.gov/Archives/edgar/data/41091/000004109119000004/x4-1ga8xkardoeloanguarante.htm)[4.1](https://www.sec.gov/Archives/edgar/data/41091/000004109119000004/x4-1ga8xkardoeloanguarante.htm).)\n\n(c)4—\nNote Purchase Agreement among Georgia Power, the DOE, and the Federal Financing Bank dated as of February 20, 2014. [(Designated in Form 8-K dated February 20, 2014, File No. 1-6468, as Exhibit 4.2.)](https://www.sec.gov/Archives/edgar/data/41091/000004109114000002/gadoeloan8-kexhibit4x2.htm)\n\n(c)5—\nFuture Advance Promissory Note dated February 20, 2014 made by Georgia Power to the FFB. [(Designated in Form 8-K dated February 20, 2014, File No.](https://www.sec.gov/Archives/edgar/data/41091/000004109114000002/gadoeloan8-kexhibit4x3.htm)[1-6468, as Exhibit](https://www.sec.gov/Archives/edgar/data/41091/000004109114000002/gadoeloan8-kexhibit4x3.htm)[4.3.)](https://www.sec.gov/Archives/edgar/data/41091/000004109114000002/gadoeloan8-kexhibit4x3.htm)\n\n(c)6—\nAmended and Restated Deed to Secure Debt, Security Agreement and Fixture Filing, dated as of March 22, 2019, by Georgia Power to PNC Bank, National Association, doing business as Midland Loan Services Inc., a division of PNC Bank, National Association. (Designated in [Form 8-K dated March 22, 2019, File No.](https://www.sec.gov/Archives/edgar/data/41091/000004109119000004/x4-4ga8xkardoeloanguarante.htm)[1-6468, as Exhibit](https://www.sec.gov/Archives/edgar/data/41091/000004109119000004/x4-4ga8xkardoeloanguarante.htm)[4.4](https://www.sec.gov/Archives/edgar/data/41091/000004109119000004/x4-4ga8xkardoeloanguarante.htm).)\n\nE-3\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\n(c)7—\nAmended and Restated Owners Consent to Assignment and Direct Agreement and Amendment to Plant Alvin W. Vogtle Additional Units Ownership Participation Agreement, dated as of March 22, 2019, among Georgia Power, the other Vogtle Owners, the DOE, and PNC Bank, National Association, doing business as Midland Loan Services Inc., a division of PNC Bank, National Association. (Designated in [Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit](https://www.sec.gov/Archives/edgar/data/41091/000004109119000004/x4-5ga8xkardoeloanguarante.htm)[4.5](https://www.sec.gov/Archives/edgar/data/41091/000004109119000004/x4-5ga8xkardoeloanguarante.htm).)\n\n(c)8—\nNote Purchase Agreement, dated as of March 22, 2019, between Georgia Power, the DOE, and the FFB. (Designated in [Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/41091/000004109119000004/x4-2ga8xkardoeloanguarante.htm).)\n\n(c)9—\nPromissory Note of Georgia Power, dated as of March 22, 2019. (Designated in [Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.3](https://www.sec.gov/Archives/edgar/data/41091/000004109119000004/x4-3ga8xkardoeloanguarante.htm).)\n\n(c)10—\nDescription of securities registered pursuant to Section 12 of the Securities Exchange Act of 1934, as amended. (Designated in [Form 10-K for the year ended December 31, 2019, File No. 1-6468, as Exhibit 4(c)10](https://www.sec.gov/Archives/edgar/data/3153/000009212220000017/x4c10-q42019.htm).)\n\nMississippi Power\n\n(d)1—\nSenior Note Indenture dated as of May 1, 1998, between Mississippi Power and Computershare Trust Company, N.A., as Successor Trustee, and certain indentures supplemental thereto through June 29, 2021. (Designated in [Form 8-K dated May](https://www.sec.gov/Archives/edgar/data/66904/0000066904-98-000012.txt)[14, 1998, File No. 001-11229, as Exhibit 4.1](https://www.sec.gov/Archives/edgar/data/66904/0000066904-98-000012.txt), in [Form 8-K dated October 11, 2011, File No. 001-11229, as Exhibit 4.2(b)](https://www.sec.gov/Archives/edgar/data/66904/000009212211000131/x4-2b.htm), in [Form 8-K dated March 5, 2012, File No. 001-11229, as Exhibit 4.2(b)](https://www.sec.gov/Archives/edgar/data/66904/000009212212000047/x4-2b.htm), in [Form 8-K dated March 22, 2018, File No. 001-11229, as Exhibit 4.2(b)](https://www.sec.gov/Archives/edgar/data/66904/000006690418000014/ms15thsupind2018b-3x18.htm), in [Form 8-K dated June 24, 2021, File No. 001-11229, as Exhibit 4.2(a)](https://www.sec.gov/Archives/edgar/data/0000066904/000006690421000014/ms16thsupind2021a-6x21.htm), and in [Form 8-K dated June 24, 2021, File No. 001-11229, as Exhibit 4.2(b)](https://www.sec.gov/Archives/edgar/data/0000066904/000006690421000014/ms17thsupind2021b-6x21.htm).)\n\n(d)\n2—\nSenior Note Indenture dated as of June 1, 2023, between Mississippi Power and Regions Bank, as Trustee, and certain indentures supplemental thereto through March 28, 2025. (Designated in [Form 10-Q for the quarter ended June 30, 2023, File No. 001-11229, as Exhibit 4(d)1](https://www.sec.gov/Archives/edgar/data/66904/000009212223000070/ex4d1mpc-xbaseseniornotein.htm), in [Form 10-Q for the quarter ended June 30, 2023, File No. 001-11229, as Exhibit 4(d)2](https://www.sec.gov/Archives/edgar/data/66904/000009212223000070/ex4d2mpc1stsupplementalind.htm), in [Form 10-Q for the quarter ended June 30, 2023, File No. 001-11229, as Exhibit 4(d)3](https://www.sec.gov/Archives/edgar/data/66904/000009212223000070/ex4d3mpc2ndsupplementalind.htm), in [Form 10-Q for the quarter ended March 31, 2024, File No. 001-11229, as Exhibit 4(d)1](https://www.sec.gov/Archives/edgar/data/3153/000009212224000042/ex4-d1mpcthirdsupplemental.htm), in[Form 10-Q for the quarter ended March 31, 2024, File No. 001-11229, as Exhibit 4(d)2,](https://www.sec.gov/Archives/edgar/data/3153/000009212224000042/ex4-d2mpcfourthsupplementa.htm)in [Form 10-Q for the quarter ended June 30, 2024, File No. 001-11229, as Exhibit 4(d)1](https://www.sec.gov/Archives/edgar/data/3153/000009212224000075/ex4-d1mpcfifthsupplemental.htm), in [Form 10-Q for the](https://www.sec.gov/Archives/edgar/data/66904/000009212225000042/ex4-d1mpcformsupplementali.htm)[quarter ended](https://www.sec.gov/Archives/edgar/data/66904/000009212225000042/ex4-d1mpcformsupplementali.htm)[March 31](https://www.sec.gov/Archives/edgar/data/66904/000009212225000042/ex4-d1mpcformsupplementali.htm)[, 2025, File No. 001-11229, as Exhibit 4](https://www.sec.gov/Archives/edgar/data/66904/000009212225000042/ex4-d1mpcformsupplementali.htm)[(](https://www.sec.gov/Archives/edgar/data/66904/000009212225000042/ex4-d1mpcformsupplementali.htm)[d)1](https://www.sec.gov/Archives/edgar/data/66904/000009212225000042/ex4-d1mpcformsupplementali.htm), and in[Form 10-Q for the quarter ended March 31, 2](https://www.sec.gov/Archives/edgar/data/66904/000009212225000042/ex4-d2mpcformsupplementali.htm)[025, File No.](https://www.sec.gov/Archives/edgar/data/66904/000009212225000042/ex4-d2mpcformsupplementali.htm)[001-11229, as Exhibit](https://www.sec.gov/Archives/edgar/data/66904/000009212225000042/ex4-d2mpcformsupplementali.htm)[4](https://www.sec.gov/Archives/edgar/data/66904/000009212225000042/ex4-d2mpcformsupplementali.htm)[(d)2](https://www.sec.gov/Archives/edgar/data/66904/000009212225000042/ex4-d2mpcformsupplementali.htm).)\n\nSouthern Power\n\n(e)1—\nSenior Note Indenture dated as of June 1, 2002, between Southern Power Company and Computershare Trust Company, N.A., as Successor Trustee, and certain indentures supplemental thereto through January 8, 2021. (Designated in [Registration No.](https://www.sec.gov/Archives/edgar/data/1160661/000116066102000001/ex4-1.txt)[333-98553 as Exhibit 4.1](https://www.sec.gov/Archives/edgar/data/1160661/000116066102000001/ex4-1.txt), in [Form 8-K dated September](https://www.sec.gov/Archives/edgar/data/1160661/000009212211000120/x4-4.htm)[14, 2011, File No.](https://www.sec.gov/Archives/edgar/data/1160661/000009212211000120/x4-4.htm)[333-98553, as Exhibit 4.4](https://www.sec.gov/Archives/edgar/data/1160661/000009212211000120/x4-4.htm), in [Form 8-K dated July 10, 2013, File No. 333-98553, as Exhibit 4.4](https://www.sec.gov/Archives/edgar/data/1160661/000116066113000008/sopowerex4-48xk2013a7x13.htm), in [Form 8-K dated June 13, 2016, File No. 001-37803, as Exhibit 4.4(b)](https://www.sec.gov/Archives/edgar/data/1160661/000116066116000057/x4-4bsopo2016ab8k.htm), in [Form 10-Q for the quarter ended September 30, 2016, File No. 001-37803, as Exhibit 4(f)1](https://www.sec.gov/Archives/edgar/data/3153/000009212216000213/x4f1-q32016.htm), and in [Form 8-K dated November 10, 2016, File No. 001-37803, as Exhibit 4.4(c)](https://www.sec.gov/Archives/edgar/data/1160661/000116066116000079/sopo8k2016d-efex4x4c.htm).)\n\n(e)2—\nSenior Note Indenture dated as of August 1, 2025 between Southern Power Company and U.S. Bank Trust Company, National Association, as Trustee, and certain indentures supplemental thereto through September 19, 2025. (Designated in [Registration No. 333-289172 as Exhibit 4.5](https://www.sec.gov/Archives/edgar/data/1160661/000116066125000004/ex4-5spcxnewseniornoteinde.htm), in [Form 8-K dated](https://www.sec.gov/Archives/edgar/data/1160661/000116066125000021/ex4-6aspc1stsupplementalin.htm)[September 16](https://www.sec.gov/Archives/edgar/data/1160661/000116066125000021/ex4-6aspc1stsupplementalin.htm)[, 2025, File](https://www.sec.gov/Archives/edgar/data/1160661/000116066125000021/ex4-6aspc1stsupplementalin.htm)[No.](https://www.sec.gov/Archives/edgar/data/1160661/000116066125000021/ex4-6aspc1stsupplementalin.htm)[001-37803](https://www.sec.gov/Archives/edgar/data/1160661/000116066125000021/ex4-6aspc1stsupplementalin.htm)[as](https://www.sec.gov/Archives/edgar/data/1160661/000116066125000021/ex4-6aspc1stsupplementalin.htm)[Exhibit](https://www.sec.gov/Archives/edgar/data/1160661/000116066125000021/ex4-6aspc1stsupplementalin.htm)[4.6(a)](https://www.sec.gov/Archives/edgar/data/1160661/000116066125000021/ex4-6aspc1stsupplementalin.htm), and in [Form 8-K dated September 16, 2025, File No. 001-37803 as](https://www.sec.gov/Archives/edgar/data/1160661/000116066125000021/ex4-6bspc2ndsupplementalin.htm)[Exhibit 4.6(b)](https://www.sec.gov/Archives/edgar/data/1160661/000116066125000021/ex4-6bspc2ndsupplementalin.htm).)\n\n(e)3—\nDescription of securities registered pursuant to Section 12 of the Securities Exchange Act of 1934, as amended. ([Designated in Form 10-K for the year ended December 31, 2022, File No. 001-37803, as Exhibit 4(e)2](https://www.sec.gov/Archives/edgar/data/92122/000009212223000012/x4e2-q42022spcdescriptiono.htm).)\n\nSouthern Company Gas\n\n(f)1—\nIndenture dated February 20, 2001 among AGL Capital Corporation, AGL Resources Inc., and Computershare Trust Company, N.A., as Successor Trustee and First Supplemental Indenture thereto dated as of September 9, 2021. [(Designated in Form S-3, File No. 333-69500, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/1004155/000093176301501677/dex42.txt), and in [Form 8-K dated September 7, 2021, File No. 1-14174, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/0001004155/000100415521000013/ex4-2sigas8xk2021asrnotes.htm).)\n\nE-4\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\n(f)2—\nSouthern Company Gas Capital Corporation's 6.00% Senior Notes due 2034, 5.875% Senior Notes due 2041, 4.40% Senior Notes due 2043, 3.250% Senior Notes due 2026, Form of 3.950% Senior Note due October 1, 2046, Form of Series 2017A 4.400% Senior Note due May 30, 2047, Form of 2020A 1.750% Senior Note due January 15, 2031, Form of Series 2021A 3.15% Senior Note due September 30, 2051, Form of Series 2022A 5.15% Senior Note due September 30, 2032, Form of Series 2023A 5.75% Senior Note due September 15, 2033, and Form of Series 2024A 4.95% Senior Note due September 15, 2034. (Designated in [Form 8-K dated September 22, 2004, File No. 1-14174, as Exhibit](https://www.sec.gov/Archives/edgar/data/1004155/000100415504000086/exhibit4-1.htm)[4.1](https://www.sec.gov/Archives/edgar/data/1004155/000100415504000086/exhibit4-1.htm), in [Form 8-K dated March 16, 2011, File No.](https://www.sec.gov/Archives/edgar/data/1004155/000100415511000058/exhibit_4-1.htm)[1-14174, as Exhibit 4.1](https://www.sec.gov/Archives/edgar/data/1004155/000100415511000058/exhibit_4-1.htm), in [Form 8-K dated May 13, 2013, File No. 1-14174, as Exhibit](https://www.sec.gov/Archives/edgar/data/1004155/000100415513000042/exhibit4_2.htm)[4.2](https://www.sec.gov/Archives/edgar/data/1004155/000100415513000042/exhibit4_2.htm), in [Form 8-K dated May 13, 2016, File No. 1-14174, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/1004155/000119312516594484/d186240dex42.htm), in [Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.1(b)](https://www.sec.gov/Archives/edgar/data/1004155/000100415516000218/sogas7yr30yr2016srex4-1b.htm), in [Form 8-K dated May 5, 2017, File No. 1-14174, as Exhibit 4.1](https://www.sec.gov/Archives/edgar/data/1004155/000100415517000010/sogas8k2017asrnotesex4-1.htm), in [Form 8-K dated August 17, 2020, File No. 1-14174, as Exhibit 4.1](https://www.sec.gov/Archives/edgar/data/1004155/000100415520000010/ex4-1gas8xk2020asrnotes.htm), in [Form 8-K dated September 9, 2021, File No. 1-14174, as Exhibit 4.1](https://www.sec.gov/Archives/edgar/data/0001004155/000100415521000013/ex4-1notegas8xk2021asrnotes.htm), in[Form 8-K dated September 6, 2022, File No. 1-14174, as Exhibit 4.1](https://www.sec.gov/Archives/edgar/data/1004155/000100415522000015/ex4-1notegas8xk2022asrnotes.htm), in [Form 8-K dated September 11, 2023, File No. 1-14174, as Exhibit 4.1](https://www.sec.gov/Archives/edgar/data/1004155/000100415523000014/ex4-1notegas8xk2023asrnotes.htm), and in [Form 8-K dated September 3, 2024, File No. 1-14174, as Exhibit 4.1](https://www.sec.gov/Archives/edgar/data/1004155/000100415524000008/ex4-1notegas8xk2024asrnotes.htm), respectively.)\n\n(f)3—\nSouthern Company Gas' Guarantee related to the 6.00% Senior Notes due 2034, Guarantee related to the 5.875% Senior Notes due 2041, Guarantee related to the 4.40% Senior Notes due 2043, Guarantee related to the 3.250% Senior Notes due 2026, Form of Guarantee related to the 3.950% Senior Notes due October 1, 2046, Form of Guarantee related to the Series 2017A 4.400% Senior Notes due May 30, 2047, Form of Guarantee related to the Series 2020A 1.750% Senior Notes due January 15, 2031, Form of Guarantee related to the Series 2021A 3.15% Senior Note due September 30, 2051, Form of Guarantee related to the Series 2022A 5.15% Senior Notes due September 30, 2032, Form of Guarantee related to the Series 2023A 5.75% Senior Notes Due September 15, 2033, and Form of Guarantee related to the Series 2024A 4.95% Senior Notes due September 15, 2034. (Designated in [Form 8-K dated September 22, 2004, File No. 1-14174, as Exhibit 4.3](https://www.sec.gov/Archives/edgar/data/1004155/000100415504000086/exhibit4-3.htm), in [Form 8-K dated March 16, 2011, File No. 1-14174, as Exhibit 4.1](https://www.sec.gov/Archives/edgar/data/1004155/000100415511000058/exhibit_4-1.htm), in [Form 8-K dated May 13, 2013, File No. 1-14174, as Exhibit 4.3](https://www.sec.gov/Archives/edgar/data/1004155/000100415513000042/exhibit4_3.htm), in [Form 8-K dated May 13, 2016, File No. 1-14174, as Exhibit 4.3](https://www.sec.gov/Archives/edgar/data/1004155/000119312516594484/d186240dex43.htm), in [Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.3(b)](https://www.sec.gov/Archives/edgar/data/1004155/000100415516000218/sogas7yr30yr2016srex4-3b.htm), in [Form 8-K dated May 5, 2017, File No. 1-14174, as Exhibit 4.3](https://www.sec.gov/Archives/edgar/data/1004155/000100415517000010/sogas8k2017asrnotesex4-3.htm), in [Form 8-K dated August 17, 2020, File No. 1-14174, as Exhibit 4.3](https://www.sec.gov/Archives/edgar/data/1004155/000100415520000010/ex4-3gas8xk2020asrnotes.htm), in [Form 8-K dated September 9, 2021, File No. 1-14174, as Exhibit 4.3](https://www.sec.gov/Archives/edgar/data/0001004155/000100415521000013/ex4-3guaranteegas8xk2021as.htm), in [Form 8-K dated September 6, 2022, File No. 1-14174, as Exhibit 4.3](https://www.sec.gov/Archives/edgar/data/1004155/000100415522000015/ex4-3guaranteegas8xk2022as.htm), and in [Form 8-K dated September 11, 2023, File No. 1-14174, as Exhibit 4.3](https://www.sec.gov/Archives/edgar/data/1004155/000100415523000014/ex4-3guaranteegas8xk2023as.htm), and in [Form 8-K dated September 3, 2024, File No. 1-14174, as Exhibit 4.3](https://www.sec.gov/Archives/edgar/data/1004155/000100415524000008/ex4-3guaranteegas8xk2024as.htm), respectively.)\n\n(f)4—\nIndenture dated as of February 1, 2025 among Southern Company Gas Capital Corporation, Southern Company Gas, and U.S. Bank Trust Company, National Association, as Trustee. ([D](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000004/ex42gasindenture2025.htm)[esignated in Registration No.](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000004/ex42gasindenture2025.htm)[333-285115, as Exhibit 4.2](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000004/ex42gasindenture2025.htm).)\n\n(f)5—\nSouthern Company Gas Capital Corporation's Form of Series 2025A 4.05% Senior Notes due September 15, 2028 and Form of Series 2025B 5.10% Senior Notes due September 15, 2035. (Designated in [Form 8-K dated Sept](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-1anotegas8xk2025asrnot.htm)[ember 3, 2025, File No. 1-](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-1anotegas8xk2025asrnot.htm)[14174](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-1anotegas8xk2025asrnot.htm)[,](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-1anotegas8xk2025asrnot.htm)[as Exhibit](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-1anotegas8xk2025asrnot.htm)[4.1(a)](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-1anotegas8xk2025asrnot.htm) and in [Form 8-K dated September 3, 2025, File No. 1-14174](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-1bnotegas8xk2025bsrnot.htm)[,](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-1bnotegas8xk2025bsrnot.htm)[as Exhibit](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-1bnotegas8xk2025bsrnot.htm)[4.1](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-1bnotegas8xk2025bsrnot.htm)[(b)](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-1bnotegas8xk2025bsrnot.htm)[,](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-1bnotegas8xk2025bsrnot.htm) respectively.)\n\n(f)6—\nSouthern Company Gas' Form of Guarantee related to the Series 2025A 4.05% Senior Notes due September 15, 2028 and Form of Guarantee related to the Series 2025B 5.10% Senior Notes due September 15, 2035. (Designated in [Form 8-K dated September 3, 2025, File No. 1-14174](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-3aguaranteegas8xk2025a.htm)[,](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-3aguaranteegas8xk2025a.htm)[as Exhibit](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-3aguaranteegas8xk2025a.htm)[4.](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-3aguaranteegas8xk2025a.htm)[3](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-3aguaranteegas8xk2025a.htm)[(a)](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-3aguaranteegas8xk2025a.htm) and in [Form 8-K dated September 3, 2025, File No. 1-14174](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-3bguaranteegas8xk2025b.htm)[,](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-3bguaranteegas8xk2025b.htm)[as Exhibit](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-3bguaranteegas8xk2025b.htm)[4.](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-3bguaranteegas8xk2025b.htm)[3](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-3bguaranteegas8xk2025b.htm)[(b)](https://www.sec.gov/Archives/edgar/data/1004155/000100415525000022/ex4-3bguaranteegas8xk2025b.htm), respectively.)\n\n(f)7—Indenture dated December 1, 1989 of Atlanta Gas Light Company and First Supplemental Indenture thereto dated March 16, 1992. (Designated in Form S-3, File No. 33-32274, as Exhibit 4(a) and in Form S-3, File No. 33-46419, as Exhibit 4(a).)\n\nE-5\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\n(f)8—\nIndenture of Commonwealth Edison Company to Continental Illinois National Bank and Trust Company of Chicago, Trustee, dated as of January 1, 1954, Indenture of Adoption of Northern Illinois Gas Company to Continental Illinois National Bank and Trust Company of Chicago, Trustee, dated February 9, 1954, and certain indentures supplemental thereto. (Designated in [Form 10-K for the year ended December 31, 1995, File No. 1-7296, as Exhibit 4.01](https://www.sec.gov/Archives/edgar/data/110104/0000110104-96-000002.txt), in [Form 10-K for the year ended December 31, 1995, File No. 1-7296, as Exhibit 4.02](https://www.sec.gov/Archives/edgar/data/110104/0000110104-96-000002.txt), in Registration No. 2-56578 as Exhibits 2.21 and 2.25, in [Form 10-Q for the quarter ended June 30, 1996, File No. 1-7296, as Exhibit 4.01](https://www.sec.gov/Archives/edgar/data/110104/0000110104-96-000008.txt), in [Form 10-K for the year ended December 31, 1997, File No. 1-7296, as Exhibit 4.19](https://www.sec.gov/Archives/edgar/data/110104/0000110104-98-000001.txt), in [Form 10-K for the year ended December 31, 2003, File No. 1-7296, as Exhibit 4.10](https://www.sec.gov/Archives/edgar/data/110104/000011010404000003/exh410supplemental.txt), in [Form 10-K for the year ended December 31, 2006, File No. 1-7296, as Exhibit 4.11](https://www.sec.gov/Archives/edgar/data/110104/000011010407000003/supplemental_indenture.htm), in [Form 10-Q for the quarter ended September 30, 2008, File No. 1-7296, as Exhibit 4.01](https://www.sec.gov/Archives/edgar/data/110104/000011010408000019/supplementalindenture.htm), in [Form 10-Q for the quarter ended September 30, 2012, File No. 1-7296, as Exhibit 4](https://www.sec.gov/Archives/edgar/data/110104/000011010412000013/exhibit_4.htm), in [Form 10-K for the year ended December 31, 2016, File No. 1-14174, as Exhibit 4(g)6](https://www.sec.gov/Archives/edgar/data/3153/000009212217000007/x4g6-10k2016.htm), in [Form 10-K for the year ended December 31, 2017, File No. 1-14174, as Exhibit 4(g)6](https://www.sec.gov/Archives/edgar/data/3153/000009212218000012/x4g6-10k2017nicorsup2017.htm), in [Form 10-Q for the quarter ended September 30, 2018, File No. 1-14174, as Exhibit 4(g)1](https://www.sec.gov/Archives/edgar/data/3153/000009212218000062/x4g1-q32018_nicorsupind.htm), in [Form 10-K for the year ended December 31, 2019, File No. 1-14174, as Exhibit 4(f)6](https://www.sec.gov/Archives/edgar/data/3153/000009212220000017/x4f6-q42019.htm), in [Form 10-K for the year ended December 31, 2020, File No. 1-14174, as Exhibit 4(f)6](https://www.sec.gov/Archives/edgar/data/1004155/000009212221000006/x4f6-q42020nicorsupind.htm), in [Form 10-Q for the quarter ended September 30, 2021, File No. 1-4174, as Exhibit 4(f)4](https://www.sec.gov/Archives/edgar/data/0001004155/000009212221000092/x4f4-q32021.htm), in [Form 10-Q for the quarter ended September 30, 2023, File No. 1-4174, as Exhibit 4(f)3](https://www.sec.gov/Archives/edgar/data/92122/000009212223000101/ex4-f3nicorsupplementalind.htm), in [Form 10-Q for the quarter ended September 30, 2024, File No. 1-4174, as Exhibit 4(f)3](https://www.sec.gov/Archives/edgar/data/3153/000009212224000089/ex4-f3nicorsupplementalind.htm), and in [Form 10-Q for the quarter ended September 30, 2025, File No. 1-4174, as Exhibit 4(f)](https://www.sec.gov/Archives/edgar/data/3153/000009212225000084/ex4-f6nicorsupplementalind.htm)[6](https://www.sec.gov/Archives/edgar/data/3153/000009212225000084/ex4-f6nicorsupplementalind.htm).)\n\n(10)Material Contracts\n\nSouthern Company\n\n#(a)1—\nDeferred Compensation Plan for Outside Directors of The Southern Company, Amended and Restated effective June 1, 2021 and First Amendment thereto effective as of June 1, 2021. (Designated in [Form 10-Q for the quarter ended June 30, 2021, File No. 1-3526, as Exhibit 10(a)2](https://www.sec.gov/Archives/edgar/data/0001004155/000009212221000064/x10a2-q22021.htm), and in [Form 10-K for the year ended December 31, 2021, File No. 1-3526, as Exhibit 10(a)25](https://www.sec.gov/Archives/edgar/data/92122/000009212222000003/x10a25-q42021.htm).)\n\n \n#(a)2—\nSouthern Company Deferred Compensation Plan, Amended and Restated as of January 1, 2025. ([Desi](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex10a-2sodeferredcompensat.htm)[gnated in Form 10-K for the year ended December 31, 2024, File No. 1-3526 as Exhibit 10(a)2.](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex10a-2sodeferredcompensat.htm))\n\n#(a)3—\nThe Southern Company Supplemental Executive Retirement Plan, Amended and Restated effective June 30, 2016, Amendment No. 1 thereto effective January 1, 2017, Amendment No. 2 thereto effective January 1, 2018, Amendment No. 3 thereto effective April 1, 2018, Amendment No. 4 thereto effective December 4, 2018, Amendment No. 5 thereto effective January 1, 2019 and Amendment No. 6 thereto effective January 1, 2019. (Designated in [Form 10-Q for the quarter ended June 30, 2016, File No. 1-3526, as Exhibit 10(a)1](https://www.sec.gov/Archives/edgar/data/3153/000009212216000179/x10a1-q22016.htm), in [Form 10-K for the year ended December 31, 2016, File No. 1-3526, as Exhibit 10(a)18](https://www.sec.gov/Archives/edgar/data/3153/000009212217000007/x10a18-10k2016.htm), in [Form 10-K for the year ended December 31, 2017, File No. 1-3526, as Exhibit 10(a)16](https://www.sec.gov/Archives/edgar/data/3153/000009212218000012/x10a16-10k2017amendserp.htm), in [Form 10-Q for the quarter ended March 31, 2018, File No. 1-3526, as Exhibit 10(a)1](https://www.sec.gov/Archives/edgar/data/3153/000009212218000027/x10a1-q12018.htm), in [Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)23](https://www.sec.gov/Archives/edgar/data/3153/000009212219000006/ex10a23_2018x10k.htm), in [Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)24](https://www.sec.gov/Archives/edgar/data/3153/000009212219000006/ex10a24_2018x10k.htm), and in [Form 10-K for the year ended December 31, 2019, File No. 1-3526, as Exhibit 10(a)24](https://www.sec.gov/Archives/edgar/data/3153/000009212220000017/x10a24-q42019.htm).)\n\n#(a)4—\nThe Southern Company Supplemental Benefit Plan, Amended and Restated effective as of June 30, 2016, Amendment No. 1 thereto effective January 1, 2017, Amendment No. 2 thereto effective January 1, 2018, Amendment No. 3 thereto effective April 1, 2018, Amendment No. 4 thereto dated December 14, 2018, Amendment No. 5 thereto effective January 1, 2019, Amendment No. 6 thereto effective January 1, 2019, Amendment No. 7 thereto effective June 30, 2016, and Amendment No. 8 thereto effective July 1, 2021. (Designated in [Form 10-Q for the quarter ended June 30, 2016, File No. 1-3526, as Exhibit 10(a)2](https://www.sec.gov/Archives/edgar/data/3153/000009212216000179/x10a2-q22016.htm), in [Form 10-K for the year ended December 31, 2016, File No. 1-3526, as Exhibit 10(a)19](https://www.sec.gov/Archives/edgar/data/3153/000009212217000007/x10a19-10k2016.htm), in [Form 10-K for the year ended December 31, 2017, File No. 1-3526, as Exhibit 10(a)17,](https://www.sec.gov/Archives/edgar/data/3153/000009212218000012/x10a17-10k2017amendsbp.htm) in [Form 10-Q for the quarter ended March 31, 2018, File No. 1-3526, as Exhibit 10(a)2](https://www.sec.gov/Archives/edgar/data/3153/000009212218000027/x10a2-q12018.htm), in [Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)25](https://www.sec.gov/Archives/edgar/data/3153/000009212219000006/ex10a25_2018x10k.htm), in [Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)26](https://www.sec.gov/Archives/edgar/data/3153/000009212219000006/ex10a26_2018x10k.htm) in [Form 10-K for the year ended December 31, 2019, File No. 1-3526, as Exhibit 10(a)23](https://www.sec.gov/Archives/edgar/data/3153/000009212220000017/x10a23-q42019.htm), in [Form 10-K for the year ended December 31, 2020, File No. 1-3526, as Exhibit 10(a) 25](https://www.sec.gov/Archives/edgar/data/0001004155/000009212221000006/x10a25-q420207thamsupbenpl.htm), and in [Form 10-Q for the quarter ended March 31, 2022, File No. 1-3526, as Exhibit 10(a)5](https://www.sec.gov/Archives/edgar/data/92122/000009212222000014/x10a5-q12022.htm).)\n\n#(a)5—\nAmended and Restated Southern Company Change in Control Benefits Protection Plan effective August 15, 2022. ([Designated in Form 8-K dated August 15, 2022, File No. 1-3526, as Exhibit 10.1](https://www.sec.gov/Archives/edgar/data/92122/000009212222000043/ex10-1soarcicbenproplan.htm).)\n\nE-6\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\n#(a)6—\nDeferred Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2001, between Delaware Charter Guarantee & Trust Company, Southern Company, SCS, Alabama Power, Georgia Power, Mississippi Power, Southern Linc, Southern Company Energy Solutions, LLC, and Southern Nuclear and First Amendment thereto effective January 1, 2009. (Designated in[Form 10-K for the year ended December](https://www.sec.gov/Archives/edgar/data/3153/000009212201500065/x10a103.txt)[31, 2000, File No.](https://www.sec.gov/Archives/edgar/data/3153/000009212201500065/x10a103.txt)[1-3526, as Exhibit 10(a)103](https://www.sec.gov/Archives/edgar/data/3153/000009212201500065/x10a103.txt) and in [Form 10-K for the year ended December](https://www.sec.gov/Archives/edgar/data/3153/000009212209000011/x10a16.htm)[31, 2008, File No.](https://www.sec.gov/Archives/edgar/data/3153/000009212209000011/x10a16.htm)[1-3526, as Exhibit 10(a)16](https://www.sec.gov/Archives/edgar/data/3153/000009212209000011/x10a16.htm).)\n\n#(a)7—\nAmended and Restated Deferred Stock Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective December 16, 2020, by and between Southern Company and Delaware Charter Guarantee & Trust Company. ([Designated in Form 10-K for the year ended December 31, 2020, File No. 1-3526, as Exhibit 10(a)9](https://www.sec.gov/Archives/edgar/data/92122/000009212221000006/x10a9-q42020defsttragreedir.htm).)\n\n#(a)8—\nAmended and Restated Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective December 16, 2020, by and between Southern Company and Delaware Charter Guarantee & Trust Company. ([Designated in Form 10-K for the year ended December 31, 2020, File No. 1-3526, as Exhibit 10(a)10](https://www.sec.gov/Archives/edgar/data/92122/000009212221000006/x10a10-q42020.htm).)\n\n#(a)9—\nSouthern Company Senior Executive Change in Control Severance Plan, Amended and Restated effective August 15, 2022. (Designated in [Form 8-K dated August 15, 2022, File No. 1-3526, as Exhibit 10.2](https://www.sec.gov/Archives/edgar/data/92122/000009212222000043/ex10-2amrestatedsrexeccics.htm).)\n\n#(a)10—\nSouthern Company Executive Change in Control Severance Plan, Amended and Restated effective August 15, 2022. (Designated in [Form 10-Q for the quarter ended September 30, 2022, File No. 1-3526, as Exhibit 10(a)3](https://www.sec.gov/Archives/edgar/data/92122/000009212222000064/x10a3-q42022.htm).)\n\n#(a)11—\nForm of Terms for Named Executive Officer Equity Awards Granted under the Southern Company 2021 Equity and Incentive Compensation Plan. (Designated in [Form 10-Q for the quarter ended March 31, 2022, File No. 1-3526, as Exhibit 10(a)1](https://www.sec.gov/Archives/edgar/data/92122/000009212222000014/x10a1-q12022.htm)).\n\n(a)12—\nThe Southern Company Employee Savings Plan, Amended and Restated effective January 1, 2018, First Amendment thereto dated December 7, 2018, Second Amendment thereto dated January 29, 2019, Third Amendment thereto dated December 4, 2019, Fourth Amendment thereto dated November 27, 2020, Fifth Amendment thereto effective July 1, 2021, Sixth Amendment thereto effective July 1, 2021, Seventh Amendment thereto dated December 23, 2022, Eighth Amendment thereto dated December 13, 2023, and Ninth Amendment thereto dated December 16, 2024. (Designated in [Post-Effective Amendment No. 1 to Form S-8, File No. 333-212783 as Exhibit 4.3](https://www.sec.gov/Archives/edgar/data/92122/000009212218000003/x4-3sos8pos1x18amrestatede.htm), in [Form 10-K for the year ended December 31, 2019, File No. 1-3526, as Exhibit 10(a)25](https://www.sec.gov/Archives/edgar/data/3153/000009212220000017/x10a25-q42019.htm), in [Form 10-K for the year ended December 31, 2019, File No. 1-3526, as Exhibit 10(a)26](https://www.sec.gov/Archives/edgar/data/3153/000009212220000017/x10a26-q42019.htm), in [Form 10-K for the year ended December 31, 2019, File No. 1-3526, as Exhibit 10(a)27](https://www.sec.gov/Archives/edgar/data/3153/000009212220000017/x10a27-q42019.htm), in [Form 10-K for the year ended December 31, 2020, File No. 1-3526, as Exhibit 10(a)26](https://www.sec.gov/Archives/edgar/data/0001004155/000009212221000006/x10a26-q420204thamesp.htm), in [Form 10-Q for the quarter ended March 31, 2022, File No. 1-3526, as Exhibit 10(a)2](https://www.sec.gov/Archives/edgar/data/92122/000009212222000014/x10a2-q12022.htm), in [Form 10-Q for the quarter ended March 31, 2022, File No. 1-3526, as Exhibit 10(a)3](https://www.sec.gov/Archives/edgar/data/92122/000009212222000014/x10a3-q12022.htm), in [Form 10-K for the year ended December 31, 2022, File No. 1-3526, as Exhibit 10(a)17](https://www.sec.gov/Archives/edgar/data/92122/000009212223000012/x10a17-q42022ax7thamendesp.htm), in [Form 10-K for the year ended December 31, 2023, File No. 1-3526, as Exhibit 10(a)17](https://www.sec.gov/Archives/edgar/data/3153/000009212224000009/ex10a-17eighthamendmentto2.htm), and in [Form 10-K for th](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex10a-139thamendmentto2018.htm)[e](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex10a-139thamendmentto2018.htm)[year ended Decem](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex10a-139thamendmentto2018.htm)[ber 31, 2024, File No. 1-3526, as Exhibit 10(a)13](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex10a-139thamendmentto2018.htm).)\n\n*(a)13—\n[Tenth](ex10a-1310thamendmenttosou.htm)[amendment to the Southern Company Emplo](ex10a-1310thamendmenttosou.htm)[y](ex10a-1310thamendmenttosou.htm)[ee Sa](ex10a-1310thamendmenttosou.htm)[vings Plan](ex10a-1310thamendmenttosou.htm)[, dated](ex10a-1310thamendmenttosou.htm)[December 12, 2025](ex10a-1310thamendmenttosou.htm).\n\n#(a)14—\nDeferred Compensation Agreement between Southern Company, SCS, Georgia Power, and Christopher C. Womack, effective December 10, 2008. (Designated in [Form 10-Q for the quarter ended September 30, 2022, File No. 1-3526, as Exhibit 10(a)4](https://www.sec.gov/Archives/edgar/data/92122/000009212222000064/x10a4-q32022.htm).)\n\n#(a)15—\nThe Southern Company Equity and Incentive Compensation Plan, effective May 26, 2021. (Designated in [Form 8-K dated May 26, 2021, File No. 1-3526, as Exhibit 10.1](https://www.sec.gov/Archives/edgar/data/0000092122/000009212221000051/x10-1so8xk2021shareholderm.htm).)\n\n*#(a)16—\n[Consulting Agreement between SCS and Daniel S. Tucker dated August 11, 2025](ex10a-16tuckerconsultingag.htm).\n\n*#(a)17—\n[D](ex10a-17porochdca.htm)[eferred Compen](ex10a-17porochdca.htm)[sation Agreement](ex10a-17porochdca.htm)[among](ex10a-17porochdca.htm)[Southern Company, SCS](ex10a-17porochdca.htm)[,](ex10a-17porochdca.htm)[and David P. Por](ex10a-17porochdca.htm)[oc](ex10a-17porochdca.htm)[h](ex10a-17porochdca.htm)[effective](ex10a-17porochdca.htm)[January 4, 2012](ex10a-17porochdca.htm).\n\nAlabama Power\n\n(b)1—\nIntercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power Company, Mississippi Power, Southern Power Company, and SCS and Appendix A thereto dated as of January 1, 2019. (Designated in [Form 10-Q for the quarter ended March 31, 2007, File No.](https://www.sec.gov/Archives/edgar/data/3153/000009212207000045/x10b5.htm)[1-3164, as Exhibit 10(b)5](https://www.sec.gov/Archives/edgar/data/3153/000009212207000045/x10b5.htm) and in [Form 10-K for the year ended December 31, 2018, File No. 1-3164, as Exhibit 10(b)2](https://www.sec.gov/Archives/edgar/data/3153/000009212219000006/ex10b2_2018x10k.htm).)\n\nE-7\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\nGeorgia Power\n\n(c)1—\nIntercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power Company, Mississippi Power, Southern Power Company, and SCS and Appendix A thereto dated as of January 1, 2019. See Exhibit 10(b)1 herein.\n\n(c)2—\nRevised and Restated Integrated Transmission System Agreement dated as of November 12, 1990, between Georgia Power and OPC. (Designated in Form 10-K for the year ended December 31, 1990, File No. 1-6468, as Exhibit 10(g).)\n\n(c)3—\nRevised and Restated Integrated Transmission System Agreement between Georgia Power and Dalton dated as of December 7, 1990. (Designated in Form 10-K for the year ended December 31, 1990, File No. 1-6468, as Exhibit 10(gg).)\n\n(c)4—\nRevised and Restated Integrated Transmission System Agreement between Georgia Power and MEAG Power dated as of December 7, 1990. (Designated in Form 10-K for the year ended December 31, 1990, File No. 1-6468, as Exhibit 10(hh).)\n\nMississippi Power\n\n(d)1—\nIntercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power Company, Mississippi Power, Southern Power Company, and SCS and Appendix A thereto dated as of January 1, 2019. See Exhibit 10(b)1 herein.\n\nSouthern Power\n\n(e)1—\nIntercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power Company, Mississippi Power, Southern Power Company, and SCS and Appendix A thereto dated as of January 1, 2019. See Exhibit 10(b)1 herein.\n\nSouthern Company Gas\n\n(f)1—\nFinal Allocation Agreement dated January 3, 2008. (Designated in [Form 10-K for the year ended December 31, 2007, File No. 1-7296, as Exhibit 10.15](https://www.sec.gov/Archives/edgar/data/110104/000011010408000003/finalallocationagreement.htm).)\n\n(19)\nInsider Trading Policies and Procedures\n\nSouthern Company\n\n(a)—\nProhibition of Securities Trading Policy. (Designated in [Form 10-K for the year ended December 31, 2024, File No. 1-3526](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19aprohibitionofsecuriti.htm)[, as Exhibit](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19aprohibitionofsecuriti.htm)[19(a)](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19aprohibitionofsecuriti.htm).)\n\nAlabama Power\n\n(b)\n—\nProhibition of Securities Trading Policy. (Designated in [Form 10-K for the year ended December 31, 2024, File No. 1-3526, as Exhibit 19(](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19bprohibitionofsecuriti.htm)[b](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19bprohibitionofsecuriti.htm)[)](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19bprohibitionofsecuriti.htm).)\n\nGeorgia Power\n\n(c)\n—\nProhibition of Securities Trading Policy. (Designated in [Form 10-K for the year ended December 31, 2024, File No. 1-3526, as Exhibit 19(](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19cprohibitionofsecuriti.htm)[c](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19cprohibitionofsecuriti.htm)[)](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19cprohibitionofsecuriti.htm).)\n\nMississippi Power\n\n(d)\n—\nProhibition of Securities Trading Policy. (Designated in [Form 10-K for the year ended December 31, 2024, File No. 1-3526, as Exhibit 19(](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19dprohibitionofsecuriti.htm)[d](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19dprohibitionofsecuriti.htm)[)](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19dprohibitionofsecuriti.htm).)\n\nSouthern Power\n\n(e)\n—\nProhibition of Securities Trading Policy. (Designated in [Form 10-K for the year ended December 31, 2024, File No. 1-3526, as Exhibit 19(](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19eprohibitionofsecuriti.htm)[e](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19eprohibitionofsecuriti.htm)[)](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19eprohibitionofsecuriti.htm).)\n\nSouthern Company Gas\n\n(f)\n—\nProhibition of Securities Trading Policy. ([Designated in Form 10-K for the year ended December 31, 2024, File No. 1-3526, as Exhibit 19(](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19fprohibitionofsecuriti.htm)[f](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19fprohibitionofsecuriti.htm)[)](https://www.sec.gov/Archives/edgar/data/3153/000009212225000018/ex19fprohibitionofsecuriti.htm).)\n\n(21)Subsidiaries of Registrants\n\nSouthern Company\n\n*(a)—\n[Subsidiaries of Registrant](ex21-aq42025xsubsidiarieso.htm).\n\nAlabama Power\n\nOmitted pursuant to General Instruction I(2)(b) of Form 10-K.\n\nGeorgia Power\n\nOmitted pursuant to General Instruction I(2)(b) of Form 10-K.\n\nE-8\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\nMississippi Power\n\nOmitted pursuant to General Instruction I(2)(b) of Form 10-K.\n\nSouthern Power\n\nOmitted pursuant to General Instruction I(2)(b) of Form 10-K.\n\nSouthern Company Gas\n\nOmitted pursuant to General Instruction I(2)(b) of Form 10-K.\n\n(23)Consents of Experts and Counsel\n\nSouthern Company\n\n*(a)1 —\n[Consent of Deloitte](x23a1-q42025xconsentxsouth.htm)[& Touche LLP](x23a1-q42025xconsentxsouth.htm).\n\nAlabama Power\n\n*(b)1 —\n[Consent of Deloitte](x23b1-q42025xapcconsent.htm)[& Touche LLP](x23b1-q42025xapcconsent.htm).\n\nGeorgia Power\n\n*(c)1 —\n[Consent of Deloitte & Touche LLP](x23c1-q42025xgpcconsent.htm).\n\nMississippi Power\n\n*(d)1 —\n[Consent of Deloitte](x23d1-q42025xmpcconsent.htm)[& Touche LLP](x23d1-q42025xmpcconsent.htm).\n\nSouthern Power\n\n*(e)1 —\n[Consent of Deloitte](x23e1-q42025xspcconsent.htm)[& Touche LLP](x23e1-q42025xspcconsent.htm).\n\nSouthern Company Gas\n\n*(f)1 —\n[Consent of Deloitte](x23f1-q44025xgasconsent.htm)[& Touche LLP](x23f1-q44025xgasconsent.htm).\n\n*(f)2 —\n[Consent of BDO USA, P.C](x23f2-q42025xbdogasconsent.htm).\n\n(24)Powers of Attorney and Resolutions\n\nSouthern Company\n\n*(a)1—\n[Power of Attorney and resolution](x24a1-q42025xsopoa.htm).\n\nAlabama Power\n\n*(b)1—\n[Power of Attorney and resolution](x24b1q42025-apcpoa.htm).\n\nGeorgia Power\n\n*(c)1—\n[Power of Attorney and resolution](x24c1-q42025xgpcpoa.htm).\n\nMississippi Power\n\n*(d)1—\n[Power of Attorney and resolution](x24d1-q42025xmpcpoa.htm).\n\nSouthern Power\n\n*(e)1—\n[Power of Attorney and resolution](x24e1-q42025xspcpoa.htm).\n\nSouthern Company Gas\n\n*(f)1—\n[Power of Attorney and resolution](x24f1-q42025xgaspoa.htm).\n\n(31)Section 302 Certifications\n\nSouthern Company\n\n*(a)1—\n[Certificate of Southern Company's Chief Executive Officer required by Section](x31a1-q42025so.htm)[302 of the Sarbanes-Oxley Act of 2002](x31a1-q42025so.htm).\n\n*(a)2—\n[Certificate of Southern Company's Chief Financial Officer required by Section](x31a2-q42025so.htm)[302 of the Sarbanes-Oxley Act of 2002](x31a2-q42025so.htm).\n\nAlabama Power\n\n*(b)1—\n[Certificate of Alabama Power's Chief Executive Officer required by Section](x31b1-q42025apc.htm)[302 of the Sarbanes-Oxley Act of 2002](x31b1-q42025apc.htm).\n\n*(b)2—\n[Certificate of Alabama Power's Chief Financial Officer required by Section](x31b2-q42025apc.htm)[302 of the Sarbanes-Oxley Act of 2002](x31b2-q42025apc.htm).\n\nE-9\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\nGeorgia Power\n\n*(c)1—\n[Certificate of Georgia Power's Chief Executive Officer required by Section](x31c1-q42025gpc.htm)[302 of the Sarbanes-Oxley Act of 2002](x31c1-q42025gpc.htm).\n\n*(c)2—\n[Certificate of Georgia Power's Chief Financial Officer required by Section](x31c2-q42025gpc.htm)[302 of the Sarbanes-Oxley Act of 2002](x31c2-q42025gpc.htm).\n\nMississippi Power\n\n*(d)1—\n[Certificate of Mississippi Power's Chief Executive Officer required by Section](x31d1-q42025mpc.htm)[302 of the Sarbanes-Oxley Act of 2002](x31d1-q42025mpc.htm).\n\n*(d)2—\n[Certificate of Mississippi Power's Chief Financial Officer required by Section](x31d2-q42025mpc.htm)[302 of the Sarbanes-Oxley Act of 2002](x31d2-q42025mpc.htm).\n\nSouthern Power\n\n*(e)1—\n[Certificate of Southern Power Company's Chief Executive Officer required by Section](x31e1-q42025spc.htm)[302 of the Sarbanes-Oxley Act of 2002](x31e1-q42025spc.htm).\n\n*(e)2—\n[Certificate of Southern Power Company's Chief Financial Officer required by Section](x31e2-q42025spc.htm)[302 of the Sarbanes-Oxley Act of 2002](x31e2-q42025spc.htm).\n\nSouthern Company Gas\n\n*(f)1—\n[Certificate of Southern Company Gas' Chief Executive Officer required by Section](x31f1-q42025gas.htm)[302 of the Sarbanes-Oxley Act of 2002](x31f1-q42025gas.htm).\n\n*(f)2—\n[Certificate of Southern Company Gas' Chief Financial Officer required by Section](x31f2-q42025gas.htm)[302 of the Sarbanes-Oxley Act of 2002](x31f2-q42025gas.htm).\n\n(32)Section 906 Certifications\n\nSouthern Company\n\n*(a)—\n[Certificate of Southern Company's Chief Executive Officer and Chief Financial Officer required by Section](x32a-q42025so.htm)[906 of the Sarbanes-Oxley Act of 2002](x32a-q42025so.htm).\n\nAlabama Power\n\n*(b)—\n[Certificate of Alabama Power's Chief Executive Officer and Chief Financial Officer required by Section](x32b-q42025apc.htm)[906 of the Sarbanes-Oxley Act of 2002](x32b-q42025apc.htm).\n\nGeorgia Power\n\n*(c)—\n[Certificate of Georgia Power's Chief Executive Officer and Chief Financial Officer required by Section](x32c-q42025gpc.htm)[906 of the Sarbanes-Oxley Act of 2002](x32c-q42025gpc.htm).\n\nMississippi Power\n\n*(d)—\n[Certificate of Mississippi Power's Chief Executive Officer and Chief Financial Officer required by Section](x32d-q42025mpc.htm)[906 of the Sarbanes-Oxley Act of 2002](x32d-q42025mpc.htm).\n\nSouthern Power\n\n*(e)—\n[Certificate of Southern Power Company's Chief Executive Officer and Chief Financial Officer required by Section](x32e-q42025spc.htm)[906 of the Sarbanes-Oxley Act of 2002](x32e-q42025spc.htm).\n\nSouthern Company Gas\n\n*(f)—\n[Certificate of Southern Company Gas' Chief Executive Officer and Chief Financial Officer required by Section](x32f-q42025gas.htm)[906 of the Sarbanes-Oxley Act of 2002](x32f-q42025gas.htm).\n\n(97)\nPolicy Relating to Recovery of Erroneously Awarded Compensation\n\nSouthern Company\n\n(a)—\nThe Southern Company and Covered Subsidiaries Compensation Recoupment Policy, effective December 1, 2023. ([Designated in Form 10-K for the year ended December 31, 2023, File No. 1-3526, as Exhibit 97(a)](https://www.sec.gov/Archives/edgar/data/3153/000009212224000009/ex97asocoandcoveredsubsidi.htm).)\n\nGeorgia Power\n\n(c)—\nThe Southern Company and Covered Subsidiaries Compensation Recoupment Policy, effective December 1, 2023. See Exhibit 97(a) herein.\n\nSouthern Power\n\n(e)—\nThe Southern Company and Covered Subsidiaries Compensation Recoupment Policy, effective December 1, 2023. See Exhibit 97(a) herein.\n\nE-10\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\n(101)Interactive Data Files\n\n*INS—XBRL Instance Document – The instance document does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document.\n\n*SCH—XBRL Taxonomy Extension Schema Document\n\n*CAL—XBRL Taxonomy Calculation Linkbase Document\n\n*DEF—XBRL Definition Linkbase Document\n\n*LAB—XBRL Taxonomy Label Linkbase Document\n\n*PRE—XBRL Taxonomy Presentation Linkbase Document\n\n(104)Cover Page Interactive Data File\n\n*—Formatted as inline XBRL with applicable taxonomy extension information contained in Exhibits 101.\n\nE-11\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\nTHE SOUTHERN COMPANY\n\nSIGNATURES\n\nPursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.\n\nTHE SOUTHERN COMPANY\n\nBy:Christopher C. Womack\n\nChairman, President, and Chief Executive Officer\n\nBy:/s/ Melissa K. Caen\n\n(Melissa K. Caen, Attorney-in-fact)\n\nDate:February 18, 2026\n\nPursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.\n\nChristopher C. Womack\n\nChairman, President, and Chief Executive Officer\n\n(Principal Executive Officer)\n\nDavid P. Poroch\n\nExecutive Vice President, Chief Financial Officer, and Treasurer\n\n(Principal Financial Officer)\n\nMatthew M. Kim\n\nComptroller and Chief Accounting Officer\n(Principal Accounting Officer)\n\nDirectors:\n\nJanaki Akella\n\nShantella E. Cooper\n\nAnthony F. Earley, Jr.\n\nJames O. Etheredge\n\nDavid J. Grain\n\nDonald M. James\n\nJohn D. Johns\n\nDale E. Klein\n\nDavid E. Meador\n\nWilliam G. Smith, Jr.\n\nKristine L. Svinicki\n\nLizanne Thomas\n\nJohn M. Turner, Jr.\n\nBy:/s/ Melissa K. Caen\n\n(Melissa K. Caen, Attorney-in-fact)\n\nDate: February 18, 2026\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\nALABAMA POWER COMPANY\n\nSIGNATURES\n\nPursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.\n\nALABAMA POWER COMPANY\n\nBy:J. Jeffrey Peoples\n\nChairman, President, and Chief Executive Officer\n\nBy:/s/ Melissa K. Caen\n\n(Melissa K. Caen, Attorney-in-fact)\n\nDate:February 18, 2026\n\nPursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.\n\nJ. Jeffrey Peoples\n\nChairman, President, and Chief Executive Officer\n(Principal Executive Officer)\n\nMoses H. Feagin\n\nExecutive Vice President, Chief Financial Officer, and Treasurer\n(Principal Financial Officer)\n\nAnita D. Allcorn\n\nSenior Vice President and Comptroller\n(Principal Accounting Officer)\n\nDirectors:\n\nAngus R. Cooper, III\n\nLee C. Goodloe\n\nO. B. Grayson Hall, Jr.\n\nLarry R. Howell, Jr.\n\nAnthony A. Joseph\n\nBarbara J. Knight\n\nKevin B. Savoy\n\nCharisse D. Stokes\n\nPhillip M. Webb\n\nWilliam B. Wilson\n\nBy:/s/ Melissa K. Caen\n\n(Melissa K. Caen, Attorney-in-fact)\n\nDate: February 18, 2026\n\nSupplemental Information to be Furnished with Reports Filed Pursuant to Section 15(d) of the Act by Registrants Which Have Not Registered Securities Pursuant to Section 12 of the Act:\n\nAlabama Power is not required to send an annual report or proxy statement to its sole shareholder and parent company, The Southern Company, and will not prepare such a report after filing this Annual Report on Form 10-K for fiscal year 2025. Accordingly, Alabama Power will not file an annual report with the Securities and Exchange Commission.\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\nGEORGIA POWER COMPANY\n\nSIGNATURES\n\nPursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.\n\nGEORGIA POWER COMPANY\n\nBy:Kimberly S. Greene\n\nChairman, President, and Chief Executive Officer\n\nBy:/s/ Melissa K. Caen\n\n(Melissa K. Caen, Attorney-in-fact)\n\nDate:February 18, 2026\n\nPursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.\n\nKimberly S. Greene\n\nChairman, President, and Chief Executive Officer\n(Principal Executive Officer)\n\nTyler M. Cook\n\nSenior Vice President, Chief Financial Officer, and Treasurer\n\n(Principal Financial and Accounting Officer)\n\nAdam D. Houston\n\nVice President and Comptroller\n(Principal Accounting Officer)\n\nDirectors:\n\nJill Bullock\n\nMark L. Burns\n\nAndrew W. Evans\n\nSteven R. Ewing\n\nThomas M. Holder\n\nVirgil R. Miller\n\nValerie Montgomery Rice\n\nTonialo Smith\n\nKessel D. Stelling, Jr.\n\nBy:/s/ Melissa K. Caen\n\n(Melissa K. Caen, Attorney-in-fact)\n\nDate: February 18, 2026\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\nMISSISSIPPI POWER COMPANY\n\nSIGNATURES\n\nPursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.\n\nMISSISSIPPI POWER COMPANY\n\nBy:Pedro P. Cherry\n\nChairman, President, and Chief Executive Officer\n\nBy:/s/ Melissa K. Caen\n\n(Melissa K. Caen, Attorney-in-fact)\n\nDate:February 18, 2026\n\nPursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.\n\nPedro P. Cherry\n\nChairman, President, and Chief Executive Officer\n(Principal Executive Officer)\n\nMatthew P. Grice\n\nVice President, Treasurer, and Chief Financial Officer\n\n(Principal Financial Officer)\n\nPascal B. Gill\n\nComptroller\n(Principal Accounting Officer)\n\nDirectors:\n\nAugustus Leon Collins\n\nThomas M. Duff\n\nMary S. Graham\n\nDavid B. Hall\n\nMark E. Keenum\n\nKara R. Wilkinson\n\nCamille Scales Young\n\nBy:/s/ Melissa K. Caen\n\n(Melissa K. Caen, Attorney-in-fact)\n\nDate: February 18, 2026\n\nSupplemental Information to be Furnished with Reports Filed Pursuant to Section 15(d) of the Act by Registrants Which Have Not Registered Securities Pursuant to Section 12 of the Act:\n\nMississippi Power is not required to send an annual report or proxy statement to its sole shareholder and parent company, The Southern Company, and will not prepare such a report after filing this Annual Report on Form 10-K for fiscal year 2025. Accordingly, Mississippi Power will not file an annual report with the Securities and Exchange Commission.\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\nSOUTHERN POWER COMPANY\n\nSIGNATURES\n\nPursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.\n\nSOUTHERN POWER COMPANY\n\nBy:Christopher Cummiskey\n\nChairman and Chief Executive Officer\n\nBy:/s/ Melissa K. Caen\n\n(Melissa K. Caen, Attorney-in-fact)\n\nDate:February 18, 2026\n\nPursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.\n\nChristopher Cummiskey\n\nChairman and Chief Executive Officer\n(Principal Executive Officer)\n\nGary Kerr\n\nSenior Vice President, Chief Financial Officer, and Treasurer\n(Principal Financial Officer)\n\nJelena Andrin\n\nVice President and Comptroller\n(Principal Accounting Officer)\n\nDirectors:\n\nBryan D. Anderson\n\nStanley W. Connally, Jr.\n\nSloane N. Drake\n\nJames Y. Kerr, II\n\nDavid P. Poroch\n\nSterling A. Spainhour\n\nChristopher C. Womack\n\nBy:/s/ Melissa K. Caen\n\n(Melissa K. Caen, Attorney-in-fact)\n\nDate: February 18, 2026\n\n    [Table of Contents](#i5f73e41dadc741329774599f12c4776d_7)                                [Index to Financial Statements](#i5f73e41dadc741329774599f12c4776d_337)\n\nSOUTHERN COMPANY GAS\n\nSIGNATURES\n\nPursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.\n\nSOUTHERN COMPANY GAS\n\nBy:James Y. Kerr II\n\nChairman, President, and Chief Executive Officer\n\nBy:/s/ Melissa K. Caen\n\n(Melissa K. Caen, Attorney-in-fact)\n\nDate:February 18, 2026\n\nPursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.\n\nJames Y. Kerr II\n\nChairman, President, and Chief Executive Officer\n(Principal Executive Officer)\n\nGrace A. Kolvereid\n\nExecutive Vice President, Chief Financial Officer, and Treasurer\n(Principal Financial Officer)\n\nSarah P. Adams\n\nSenior Vice President and Comptroller\n(Principal Accounting Officer)\n\nDirectors:\n\nSandra N. Bane\n\nStephen A. Edwards\n\nVanessa C. Harrison\n\nBradley J. Henderson\n\nNorman G. Holmes\n\nJ. Bret Lane\n\nEric S. Smith\n\nA. Benjamin Spencer\n\nBy:/s/ Melissa K. Caen\n\n(Melissa K. Caen, Attorney-in-fact)\n\nDate: February 18, 2026\n\nSupplemental Information to be Furnished with Reports Filed Pursuant to Section 15(d) of the Act by Registrants Which Have Not Registered Securities Pursuant to Section 12 of the Act:\n\nSouthern Company Gas is not required to send an annual report or proxy statement to its sole shareholder and parent company, The Southern Company, and will not prepare such a report after filing this Annual Report on Form 10-K for fiscal year 2025. Accordingly, Southern Company Gas will not file an annual report with the Securities and Exchange Commission."}