Atmos Energy Corp SEC filings ATO
Atmos Energy Corp has 1,011 filings in SEC EDGAR's recent list, going back to Feb 3, 2015. Its latest annual report, Form ARS, was filed on Dec 19, 2025 for the period ended Sep 30, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 5, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Nov 4, 2026 (officer or director change, regulation fd disclosure). The company's fiscal year ends on September 30.
| Form | Description | Filed | Period |
|---|---|---|---|
| 424B2 | Prospectus | Oct 8, 2026 | — |
| FWP | Free writing prospectus | Oct 6, 2026 | — |
| 424B5 | Prospectus supplement | Oct 6, 2026 | — |
| 424B2 | Prospectus | Jun 17, 2026 | — |
| FWP | Free writing prospectus | Jun 16, 2026 | — |
| 424B5 | Prospectus supplement | Jun 15, 2026 | — |
| 424B3 | Prospectus | Feb 5, 2026 | — |
| 424B2 | Prospectus | Sep 22, 2025 | — |
| FWP | Free writing prospectus | Sep 18, 2025 | — |
| 424B5 | Prospectus supplement | Sep 18, 2025 | — |
| 424B2 | Prospectus | Jun 18, 2025 | — |
| FWP | Free writing prospectus | Jun 16, 2025 | — |
| 424B5 | Prospectus supplement | Jun 16, 2025 | — |
| S-8 | Employee stock plan registration | Apr 30, 2025 | — |
| 424B5 | Prospectus supplement | Dec 3, 2024 | — |
| S-3ASR | Automatic shelf registration | Dec 3, 2024 | — |
| 424B2 | Prospectus | Sep 19, 2024 | — |
| FWP | Free writing prospectus | Sep 17, 2024 | — |
| 424B5 | Prospectus supplement | Sep 17, 2024 | — |
| 424B2 | Prospectus | Jun 20, 2024 | — |
| FWP | Free writing prospectus | Jun 20, 2024 | — |
| 424B5 | Prospectus supplement | Jun 18, 2024 | — |
| 424B5 | Prospectus supplement | May 8, 2024 | — |
| 424B2 | Prospectus | Oct 10, 2023 | — |
| FWP | Free writing prospectus | Oct 5, 2023 | — |
| 424B5 | Prospectus supplement | Oct 5, 2023 | — |
| 424B8 | Filing | Jun 14, 2023 | — |
| 424B1 | Filing | Jun 14, 2023 | — |
| FWP | Free writing prospectus | Jun 12, 2023 | — |
| FWP | Free writing prospectus | Jun 7, 2023 | — |
| 424B5 | Prospectus supplement | Mar 31, 2023 | — |
| S-3ASR | Automatic shelf registration | Mar 31, 2023 | — |
| 424B3 | Prospectus | Nov 14, 2022 | — |
| 424B2 | Prospectus | Sep 29, 2022 | — |
| FWP | Free writing prospectus | Sep 28, 2022 | — |
| 424B5 | Prospectus supplement | Sep 27, 2022 | — |
| 424B5 | Prospectus supplement | Mar 23, 2022 | — |
| 424B2 | Prospectus | Jan 13, 2022 | — |
| FWP | Free writing prospectus | Jan 12, 2022 | — |
| 424B5 | Prospectus supplement | Jan 11, 2022 | — |
| 424B2 | Prospectus | Sep 23, 2021 | — |
| FWP | Free writing prospectus | Sep 22, 2021 | — |
| 424B5 | Prospectus supplement | Sep 21, 2021 | — |
| 424B5 | Prospectus supplement | Jun 30, 2021 | — |
| S-3ASR | Automatic shelf registration | Jun 29, 2021 | — |
| 424B2 | Prospectus | Mar 8, 2021 | — |
| FWP | Free writing prospectus | Mar 4, 2021 | — |
| 424B5 | Prospectus supplement | Mar 4, 2021 | — |
| 424B2 | Prospectus | Sep 24, 2020 | — |
| FWP | Free writing prospectus | Sep 23, 2020 | — |
| 424B5 | Prospectus supplement | Sep 23, 2020 | — |
| 424B3 | Prospectus | May 15, 2020 | — |
| 424B3 | Prospectus | Mar 20, 2020 | — |
| 424B5 | Prospectus supplement | Feb 12, 2020 | — |
| S-3ASR | Automatic shelf registration | Feb 11, 2020 | — |
| 424B3 | Prospectus | Nov 14, 2019 | — |
| 424B2 | Prospectus | Sep 27, 2019 | — |
| FWP | Free writing prospectus | Sep 25, 2019 | — |
| 424B5 | Prospectus supplement | Sep 25, 2019 | — |
| 424B3 | Prospectus | Aug 9, 2019 | — |
| 424B2 | Prospectus | Feb 27, 2019 | — |
| FWP | Free writing prospectus | Feb 26, 2019 | — |
| 424B5 | Prospectus supplement | Feb 25, 2019 | — |
| 424B2 | Prospectus | Nov 30, 2018 | — |
| 424B5 | Prospectus supplement | Nov 28, 2018 | — |
| 424B5 | Prospectus supplement | Nov 19, 2018 | — |
| S-3ASR | Automatic shelf registration | Nov 13, 2018 | — |
| 424B2 | Prospectus | Oct 2, 2018 | — |
| FWP | Free writing prospectus | Oct 1, 2018 | — |
| 424B5 | Prospectus supplement | Oct 1, 2018 | — |
| 424B2 | Prospectus | Nov 30, 2017 | — |
| 424B5 | Prospectus supplement | Nov 28, 2017 | — |
| 424B5 | Prospectus supplement | Nov 14, 2017 | — |
| 424B2 | Prospectus | Jun 7, 2017 | — |
| FWP | Free writing prospectus | Jun 5, 2017 | — |
| 424B5 | Prospectus supplement | Jun 5, 2017 | — |
| S-8 | Employee stock plan registration | May 5, 2017 | — |
| S-8 | Employee stock plan registration | Mar 29, 2016 | — |
| 424B5 | Prospectus supplement | Mar 28, 2016 | — |
| S-3ASR | Automatic shelf registration | Mar 28, 2016 | — |
| S-3D | Form s-3d | Dec 3, 2015 | — |
Showing 81 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Natural Gas Distribution (SIC 4924)
- Listed as
- ATO (NYSE)
- Fiscal year ends
- September 30
- Incorporated in
- TX
- Headquarters
- Dallas, TX
- SEC filer status
- Large accelerated filer
- SEC CIK
- 731802
Other Natural Gas Distribution companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.