SO
The Southern Company has filed 934 documents with the SEC between 2021 and 2026. The most frequent type is insider trade (658 filings), alongside the regular cadence of annual reports, quarterly reports, and event disclosures every public company must make. Use the filters to focus on one filing type, or flip the sort to trace the company's history from its earliest paperwork.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.
| Filing | Type | Filed | Period covered |
|---|---|---|---|
| SD | - | 2026-05-20 | - |
| Major company event | 8-K | 2026-05-15 | 2026-05-13 |
| SCHEDULE 13G | - | 2026-05-14 | - |
| Proxy materials | DEFA14A | 2026-05-05 | - |
| Insider trade | 4 | 2026-05-04 | 2026-05-01 |
| Insider sale notice | 144 | 2026-05-01 | - |
| SCHEDULE 13G | - | 2026-04-30 | - |
| Annual report to shareholders | ARS | 2026-04-03 | 2025-12-31 |
| Proxy materials | DEFA14A | 2026-04-03 | - |
| Proxy statement | DEF 14A | 2026-04-03 | 2026-05-13 |
| Insider trade | 4 | 2026-04-02 | 2026-04-01 |
| Insider trade | 4 | 2026-04-02 | 2026-04-01 |
| Insider trade | 4 | 2026-04-02 | 2026-04-01 |
| Insider trade | 4 | 2026-04-02 | 2026-04-01 |
| Insider trade | 4 | 2026-04-02 | 2026-04-01 |
| Insider trade | 4 | 2026-04-02 | 2026-04-01 |
| Insider trade | 4 | 2026-04-02 | 2026-04-01 |
| Insider trade | 4 | 2026-04-02 | 2026-04-01 |
| Insider trade | 4 | 2026-04-02 | 2026-04-01 |
| Insider trade | 4 | 2026-04-02 | 2026-04-01 |
| Insider trade | 4 | 2026-04-02 | 2026-04-01 |
| Insider trade | 4 | 2026-04-02 | 2026-04-01 |
| Insider trade | 4 | 2026-04-02 | 2026-04-01 |
| Insider trade | 4 | 2026-04-02 | 2026-04-01 |
| Insider trade | 4 | 2026-03-31 | 2026-03-30 |
| Insider sale notice | 144 | 2026-03-30 | - |
| SCHEDULE 13G/A | - | 2026-03-27 | - |
| PRE 14A | - | 2026-03-23 | 2026-05-13 |
| Insider sale notice | 144 | 2026-03-19 | - |
| Insider trade | 4 | 2026-03-19 | 2026-03-19 |
| Insider trade | 4 | 2026-03-19 | 2026-03-18 |
| Major company event | 8-K | 2026-03-19 | 2026-03-16 |
| Insider sale notice | 144 | 2026-03-18 | - |
| Prospectus supplement | 424B2 | 2026-03-17 | - |
| Free writing prospectus | FWP | 2026-03-16 | - |
| Prospectus supplement | 424B5 | 2026-03-16 | - |
| Insider trade | 4 | 2026-03-10 | 2026-03-08 |
| Insider trade | 4 | 2026-03-10 | 2026-03-06 |
| SCHEDULE 13G/A | - | 2026-03-05 | - |
| Insider trade | 4 | 2026-03-02 | 2026-02-26 |
| Insider trade | 4 | 2026-02-25 | 2026-02-24 |
| Insider sale notice | 144 | 2026-02-24 | - |
| Insider trade | 4 | 2026-02-17 | 2026-02-16 |
| Major company event (amended) | 8-K/A | 2026-02-17 | 2025-07-21 |
| Insider trade | 4 | 2026-02-13 | 2026-02-11 |
| Insider trade | 4 | 2026-02-13 | 2026-02-11 |
| Insider trade | 4 | 2026-02-13 | 2026-02-11 |
| Insider trade | 4 | 2026-02-13 | 2026-02-11 |
| Insider trade | 4 | 2026-02-13 | 2026-02-11 |
| Insider trade | 4 | 2026-02-13 | 2026-02-11 |