SOUTHERN CO
For the period ended Mar 31, 2025. Filed May 1, 2025.
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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.
Mar 31, 2025 · Filed May 1, 2025
SO$92.34-1.1%Stored close · as of Nov 6, 2026
Extracted filing text, with the paragraph anchors used by the comparison.
See the whole filing, with its images and exhibitsContents
Definitions
| Term | Meaning |
|---|---|
| 2022 ARP | Alternate Rate Plan approved by the Georgia PSC in 2022 for Georgia Power for the years 2023 through 2025 |
| 2023 IRP Update | Georgia Power's updated IRP filed in 2023 and approved by the Georgia PSC in April 2024 as modified by a stipulation among Georgia Power, the staff of the Georgia PSC, and certain intervenors |
| 2024 ELG Rule | Final rule published by the EPA in May 2024 revising the steam effluent guidelines |
| 2024 GHG Rules | Final rules published by the EPA in May 2024 for existing fossil fuel-fired steam electric generating units and new fossil fuel-fired combustion turbines and combined cycle generation facilities |
| AFUDC | Allowance for funds used during construction |
| AGL Services Company | AGL Services Company, Inc., the Southern Company Gas system service company and a wholly-owned subsidiary of Southern Company Gas |
| Alabama Power | Alabama Power Company |
| ARO | Asset retirement obligation |
| Atlanta Gas Light | Atlanta Gas Light Company, a wholly-owned subsidiary of Southern Company Gas |
| CCR | Coal combustion residuals |
| CCR Rule | Disposal of Coal Combustion Residuals from Electric Utilities final rule published by the EPA in 2015 |
| Chattanooga Gas | Chattanooga Gas Company, a wholly-owned subsidiary of Southern Company Gas |
| COD | Commercial operation date |
| CODM | Chief operating decision maker |
| CWIP | Construction work in progress |
| Dalton | City of Dalton, Georgia, an incorporated municipality in the state of Georgia, acting by and through its Board of Water, Light, and Sinking Fund Commissioners |
| Dalton Pipeline | A pipeline facility in Georgia in which Southern Company Gas has a 50% undivided ownership interest |
| DOE | U.S. Department of Energy |
| ECO Plan | Mississippi Power's environmental compliance overview plan |
| ELG | Effluent limitations guidelines |
| EPA | U.S. Environmental Protection Agency |
| EPC Contractor | Westinghouse and its affiliate, WECTEC Global Project Services Inc.; the former engineering, procurement, and construction contractor for Plant Vogtle Units 3 and 4 |
| FCC | Federal Communications Commission |
| FERC | Federal Energy Regulatory Commission |
| FFB | Federal Financing Bank |
| Fitch | Fitch Ratings, Inc. |
| FP&L | Florida Power and Light Company |
| Form 10-K | Annual Report on Form 10-K of Southern Company, Alabama Power, Georgia Power, Mississippi Power, Southern Power, and Southern Company Gas for the year ended December 31, 2024, as applicable |
| GAAP | U.S. generally accepted accounting principles |
| Georgia Power | Georgia Power Company |
| GHG | Greenhouse gas |
| Guarantee Settlement Agreement | The 2017 settlement agreement between the Vogtle Owners and Toshiba related to certain payment obligations of the EPC Contractor guaranteed by Toshiba |
| Heating Degree Days | A measure of weather, calculated when the average daily temperatures are less than 65 degrees Fahrenheit |
| Heating Season | The period from November through March when Southern Company Gas' natural gas usage and operating revenues are generally higher |
| Term | Meaning |
|---|---|
| IGCC | Integrated coal gasification combined cycle, the technology originally approved for Mississippi Power's Kemper County energy facility |
| IIC | Intercompany Interchange Contract |
| IRP | Integrated resource plan |
| ITC | Investment tax credit |
| KWH | Kilowatt-hour |
| LIFO | Last-in, first-out |
| LTSA | Long-term service agreement |
| MEAG Power | Municipal Electric Authority of Georgia |
| Mississippi Power | Mississippi Power Company |
| mmBtu | Million British thermal units |
| Moody's | Moody's Investors Service, Inc. |
| MRA | Municipal and Rural Associations |
| MW | Megawatt |
| natural gas distribution utilities | Southern Company Gas' natural gas distribution utilities (Nicor Gas, Atlanta Gas Light, Virginia Natural Gas, and Chattanooga Gas) |
| NDR | Alabama Power's Natural Disaster Reserve |
| Nicor Gas | Northern Illinois Gas Company, a wholly-owned subsidiary of Southern Company Gas |
| NRC | U.S. Nuclear Regulatory Commission |
| OCI | Other comprehensive income |
| OPC | Oglethorpe Power Corporation (an electric membership corporation) |
| PEP | Mississippi Power's Performance Evaluation Plan |
| PowerSecure | PowerSecure, Inc., a wholly-owned subsidiary of Southern Company |
| PPA | Power purchase agreements, as well as, for Southern Power, contracts for differences that provide the owner of a renewable facility a certain fixed price for the electricity sold to the grid |
| PSC | Public Service Commission |
| PTC | Production tax credit |
| Rate CNP | Alabama Power's Rate Certificated New Plant, consisting of Rate CNP New Plant, Rate CNP Compliance, Rate CNP PPA, and Rate CNP Depreciation |
| Rate ECR | Alabama Power's Rate Energy Cost Recovery |
| Rate RSE | Alabama Power's Rate Stabilization and Equalization |
| Registrants | Southern Company, Alabama Power, Georgia Power, Mississippi Power, Southern Power Company, and Southern Company Gas |
| ROE | Return on equity |
| S&P | S&P Global Ratings, a division of S&P Global Inc. |
| SCS | Southern Company Services, Inc., the Southern Company system service company and a wholly-owned subsidiary of Southern Company |
| SEC | U.S. Securities and Exchange Commission |
| SEGCO | Southern Electric Generating Company, 50% owned by each of Alabama Power and Georgia Power |
| SNG | Southern Natural Gas Company, L.L.C., a pipeline system in which Southern Company Gas has a 50% ownership interest |
| SOFR | Secured Overnight Financing Rate |
| Southern Company | The Southern Company |
| Southern Company Gas | Southern Company Gas and its subsidiaries |
| Southern Company Gas Capital | Southern Company Gas Capital Corporation, a wholly-owned subsidiary of Southern Company Gas |
| Term | Meaning |
|---|---|
| Southern Company power pool | The operating arrangement whereby the integrated generating resources of the traditional electric operating companies and Southern Power (excluding subsidiaries) are subject to joint commitment and dispatch in order to serve their combined load obligations |
| Southern Company system | Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas, SEGCO, Southern Nuclear, SCS, Southern Linc, PowerSecure, and other subsidiaries |
| Southern Holdings | Southern Company Holdings, Inc., a wholly-owned subsidiary of Southern Company |
| Southern Linc | Southern Communications Services, Inc., a wholly-owned subsidiary of Southern Company,doing business as Southern Linc |
| Southern Nuclear | Southern Nuclear Operating Company, Inc., a wholly-owned subsidiary of Southern Company |
| Southern Power | Southern Power Company and its subsidiaries |
| SouthStar | SouthStar Energy Services, LLC (a Marketer), a wholly-owned subsidiary of Southern Company Gas |
| SP Solar | SP Solar Holdings I, LP, a limited partnership indirectly owning substantially all of Southern Power's solar and battery energy storage facilities, in which Southern Power has a 67% ownership interest |
| SP Wind | SP Wind Holdings II, LLC, a holding company owning a portfolio of eight operating wind facilities, in which Southern Power is the controlling partner in a tax equity arrangement |
| SRR | Mississippi Power's System Restoration Rider, a tariff for retail property damage cost recovery and reserve |
| Subsidiary Registrants | Alabama Power, Georgia Power, Mississippi Power, Southern Power, and Southern Company Gas |
| Toshiba | Toshiba Corporation, the parent company of Westinghouse |
| traditional electric operating companies | Alabama Power, Georgia Power, and Mississippi Power |
| VIE | Variable interest entity |
| Virginia Natural Gas | Virginia Natural Gas, Inc., a wholly-owned subsidiary of Southern Company Gas |
| Vogtle Owners | Georgia Power, OPC, MEAG Power, and Dalton |
| WACOG | Weighted average cost of gas |
| Westinghouse | Westinghouse Electric Company LLC |
The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.