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 |
|---|---|---|---|
| Insider trade | 4 | 2025-12-04 | 2025-12-03 |
| Insider sale notice | 144 | 2025-12-03 | - |
| Annual report | 10-K | 2025-11-14 | 2025-09-30 |
| SCHEDULE 13G/A | - | 2025-11-12 | - |
| Major company event | 8-K | 2025-11-05 | 2025-11-05 |
| Insider trade | 4 | 2025-11-05 | 2025-11-04 |
| Insider trade | 4 | 2025-11-05 | 2025-11-04 |
| Insider trade | 4 | 2025-11-05 | 2025-11-04 |
| Insider trade | 4 | 2025-11-05 | 2025-11-04 |
| Insider trade | 4 | 2025-11-05 | 2025-11-04 |
| Insider trade | 4 | 2025-11-05 | 2025-11-04 |
| Insider trade | 4 | 2025-10-02 | 2025-10-01 |
| Insider trade | 4 | 2025-10-02 | 2025-10-01 |
| Major company event | 8-K | 2025-10-01 | 2025-10-01 |
| Major company event | 8-K | 2025-10-01 | 2025-09-18 |
| Prospectus supplement | 424B2 | 2025-09-22 | - |
| Free writing prospectus | FWP | 2025-09-18 | - |
| Prospectus supplement | 424B5 | 2025-09-18 | - |
| SCHEDULE 13G/A | - | 2025-08-14 | - |
| Quarterly report | 10-Q | 2025-08-06 | 2025-06-30 |
| Major company event | 8-K | 2025-08-06 | 2025-08-06 |
| Insider trade | 4 | 2025-07-02 | 2025-07-01 |
| Major company event | 8-K | 2025-06-26 | 2025-06-26 |
| Major company event | 8-K | 2025-06-26 | 2025-06-16 |
| Employee plan annual report | 11-K | 2025-06-26 | 2024-12-31 |
| Prospectus supplement | 424B2 | 2025-06-18 | - |
| Free writing prospectus | FWP | 2025-06-16 | - |
| Prospectus supplement | 424B5 | 2025-06-16 | - |
| SCHEDULE 13G/A | - | 2025-05-15 | - |
| Insider trade | 4 | 2025-05-15 | 2025-05-14 |
| Insider sale notice | 144 | 2025-05-14 | - |
| SCHEDULE 13G/A | - | 2025-05-14 | - |
| SCHEDULE 13G/A | - | 2025-05-13 | - |
| SCHEDULE 13G/A | - | 2025-05-12 | - |
| Quarterly report | 10-Q | 2025-05-07 | 2025-03-31 |
| Major company event | 8-K | 2025-05-07 | 2025-05-07 |
| Insider trade | 4 | 2025-05-05 | 2025-05-02 |
| Insider trade | 4 | 2025-05-05 | 2025-05-02 |
| Insider trade | 4 | 2025-05-05 | 2025-05-02 |
| Insider trade | 4 | 2025-05-05 | 2025-05-02 |
| Insider trade | 4 | 2025-05-05 | 2025-05-02 |
| Insider trade | 4 | 2025-05-05 | 2025-05-02 |
| Employee stock plan | S-8 | 2025-04-30 | - |
| SEC correspondence | UPLOAD | 2025-04-15 | - |
| Major company event | 8-K | 2025-04-04 | 2025-03-31 |
| Insider trade | 4 | 2025-04-02 | 2025-04-01 |
| Company correspondence | CORRESP | 2025-03-27 | - |
| Insider trade | 4 | 2025-03-11 | 2025-03-07 |
| Insider trade | 4 | 2025-03-11 | 2025-03-07 |
| Insider trade | 4 | 2025-03-11 | 2025-03-07 |