Company facts
- Industry
- Electric Services
- Headquarters
- Atlanta, Georgia
- Most recent report
- 8-K, filed Aug 6, 2026
- Incorporated
- Delaware
- Filings on record
- 1,007+ filings
- On EDGAR
- CIK 92122
- Fiscal year ends
- December
- Filer status
- Large accelerated filer
Financials 8 of 23
News 8 of 106
Prospectuses and Registrations 8 of 70
- 424B2 Prospectus supplement for an offering Jun 8, 2026
- S-3ASR Automatic shelf registration Jun 5, 2026
- 424B2 Prospectus supplement for an offering Mar 17, 2026
- FWP Free writing prospectus Mar 16, 2026
- 424B5 Prospectus supplement for an offering Mar 16, 2026
- 424B2 Prospectus supplement for an offering Nov 4, 2025
- FWP Free writing prospectus Nov 4, 2025
- 424B5 Prospectus supplement for an offering Nov 3, 2025
Proxies 8 of 35
- DEFA14A Extra proxy material May 5, 2026
- DEFA14A Extra proxy material Apr 3, 2026
- DEF 14A Proxy statement for a shareholder vote Apr 3, 2026
- PRE 14A Preliminary proxy statement Mar 23, 2026
- PX14A6G Shareholder's own proxy material May 20, 2025
- PX14A6G Shareholder's own proxy material May 16, 2025
- DEFA14A Extra proxy material May 13, 2025
- PX14A6G Shareholder's own proxy material Apr 21, 2025
Ownership 8 of 746
- 4 Insider reported a trade Sep 4, 2026
- 4 Insider reported a trade Sep 4, 2026
- 144 Notice of a proposed sale of restricted stock Sep 3, 2026
- 144 Notice of a proposed sale of restricted stock Sep 3, 2026
- 4 Insider reported a trade Sep 3, 2026
- 144 Notice of a proposed sale of restricted stock Sep 1, 2026
- 4 Insider reported a trade Aug 7, 2026
- 144 Notice of a proposed sale of restricted stock Aug 6, 2026
Other 8 of 27
- 11-K Employee stock plan report Jun 26, 2026
- SD Conflict minerals disclosure May 20, 2026
- ARS Annual report sent to shareholders Apr 3, 2026
- CERT Exchange certified a listing Nov 7, 2025
- 8-A12B Registration of a security for exchange listing Nov 6, 2025
- 11-K Employee stock plan report Jun 27, 2025
- SD Conflict minerals disclosure May 21, 2025
- ARS Annual report sent to shareholders Apr 11, 2025
What to read: Jun 2026 10-Q
SECSift found 2 of 10 sections worth reading, with 1 positive, 9 notable, and 1 negative flags.
Financial Statements (Item 1)
Core financials with key earnings, cash flow, capex, equity raise, and new DOE loans.Management's Discussion (Item 2)
Real results, regulatory updates, and capital activities; essential for understanding Southern Co.PositiveNotable- Georgia PSC approved 12.9% cut in annual fuel billings, saving customers ~$394M, effective June 2026.
- Illinois Appellate Court ruled Nicor Gas $43M disallowance was unsupported; matter remanded to commission.
- Weather-adjusted commercial KWH sales jumped 7.4% in Q2 2026, largely driven by data centers at Georgia Power.
- Traditional electric companies have contracts for ~16 GW of new large load (data center) capacity through 2028.
- NRC approved 20-year license renewal for Plant Hatch Units 1 and 2 through 2054/2058.
- Southern Power's accelerated depreciation from wind repowering projected at $200M in 2026 and $100M in 2027.
- Southern Co. issued 31.1M shares H1 2026, raising ~$2.5B from forward sales; also issued $1.3B sub notes.
- Georgia Power borrowed $1.0B from DOE loan guarantee program at 5.041% through Dec 2055.
What changed: Jun 2026 vs. Mar 2026
About 15% of SO's Jun 2026 10-Q is new information. 166 paragraphs were added, 319 changed, and 71 removed. Below are the most important lines SECSift identified.
New
- Alabama Power and Georgia Power added ~$1.7B in natural gas commitments for Plant Barry and generation projects. Item 2
- Illinois Appellate Court ruled on Nicor Gas rate case in June 2026, finding insufficient support for $43M disallowance. Item 1
- Georgia enacted 5.19% to 4.99% corporate tax cut effective 2026; offsets deferred tax liabilities. Item 2
- FERC approved two affiliate PPAs with Southern Power in June 2026. Item 1
- Georgia Power recognized a lease modification converting an affiliate PPA from operating to finance lease in June 2026. Item 1
- New ATM program established in June 2026 for up to 50M shares. Item 1
- Nicor Gas appeals Illinois capital structure ruling to state Supreme Court; ruling expected Sep 30, 2026. Item 2
Changed
Removed
Everything here comes from Southern Co's own filings on SEC EDGAR. The filing list is rechecked every hour. SECSift analysis was completed on Aug 19, 2026, from the 10-Q for Jun 2026.