ATO - CIK 0000731802
ATMOS ENERGY CORP has filed 2,121 documents with the SEC between 1994 and 2026. The most frequent type is insider trade (1,233 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 |
|---|---|---|---|
| 8-A12B/A | - | 1999-08-12 | - |
| Quarterly report | 10-Q | 1999-05-13 | 1999-03-31 |
| Major company event | 8-K | 1999-03-26 | 1999-03-24 |
| Employee stock plan | S-8 | 1999-03-01 | - |
| Employee stock plan | S-8 | 1999-03-01 | - |
| Quarterly report | 10-Q | 1999-02-12 | 1998-12-31 |
| Proxy statement | DEF 14A | 1998-12-30 | 1999-02-10 |
| 10-K405 | - | 1998-12-22 | 1998-09-30 |
| 424B3 | - | 1998-12-14 | - |
| PRE 14A | - | 1998-11-25 | 1999-02-10 |
| Quarterly report | 10-Q | 1998-08-12 | 1998-06-30 |
| Major company event | 8-K | 1998-07-29 | 1998-07-22 |
| Major company event | 8-K | 1998-07-24 | 1998-07-23 |
| Prospectus supplement | 424B2 | 1998-07-23 | - |
| 424B3 | - | 1998-07-21 | - |
| 8-A12B | - | 1998-07-08 | - |
| S-3/A | - | 1998-06-25 | - |
| Quarterly report | 10-Q | 1998-05-15 | 1998-03-31 |
| Securities registration | S-3 | 1998-04-20 | - |
| 8-A12B | - | 1998-03-24 | - |
| Employee stock plan | S-8 | 1998-02-13 | - |
| Quarterly report | 10-Q | 1998-02-11 | 1997-12-31 |
| Proxy statement | DEF 14A | 1997-12-29 | 1998-02-11 |
| Annual report | 10-K | 1997-12-22 | 1997-09-30 |
| Major company event | 8-K | 1997-11-13 | 1997-11-12 |
| S-3/A | - | 1997-10-16 | - |
| Major company event | 8-K | 1997-08-13 | 1997-07-29 |
| Quarterly report | 10-Q | 1997-08-13 | 1997-06-30 |
| Securities registration | S-3 | 1997-07-30 | - |
| Employee stock plan | S-8 | 1997-07-29 | - |
| Major company event | 8-K | 1997-07-17 | 1997-06-10 |
| Quarterly report | 10-Q | 1997-05-14 | 1997-03-31 |
| Major company event | 8-K | 1997-04-22 | 1997-04-04 |
| Major company event | 8-K | 1997-03-27 | 1997-03-17 |
| Major company event | 8-K | 1997-02-27 | 1997-02-17 |
| Quarterly report | 10-Q | 1997-02-12 | 1996-12-31 |
| Proxy statement | DEF 14A | 1996-12-27 | 1997-02-12 |
| 424B3 | - | 1996-11-14 | - |
| S-3/A | - | 1996-11-13 | - |
| Major company event | 8-K | 1996-11-13 | 1996-11-12 |
| 10-K405 | - | 1996-11-13 | 1996-09-30 |
| Major company event | 8-K | 1996-11-05 | 1996-11-02 |
| Proxy materials | DEFA14A | 1996-10-11 | - |
| S-4 | - | 1996-10-04 | - |
| Quarterly report | 10-Q | 1996-08-14 | 1996-06-30 |
| Major company event | 8-K | 1996-07-24 | 1996-07-19 |
| Securities registration | S-3 | 1996-05-08 | - |
| Quarterly report | 10-Q | 1996-05-08 | 1996-03-31 |
| Quarterly report | 10-Q | 1996-02-14 | 1995-12-31 |
| Proxy statement | DEF 14A | 1995-12-27 | 1996-02-14 |