ATMOS ENERGY CORP — DEFA14A Filings
21 DEFA14A filings on record
This page lists all DEFA14A filings submitted to the SEC by ATMOS ENERGY CORP (ATO), sorted by most recent first. Each row links to the full filing on EdgarLookup. ATMOS ENERGY CORP has filed 21 DEFA14A documents with the SEC since 2014. To view all SEC filings by ATMOS ENERGY CORP, see the full filings list.
All
10-K
10-K/A
10-K405
10-Q
10-Q/A
11-K
144
3
3/A
305B2
4
4/A
424B1
424B2
424B3
424B5
424B8
5
8-A12B
8-A12B/A
8-K
8-K/A
ARS
CORRESP
DEF 14A
DEFA14A
EFFECT
FWP
PRE 14A
PX14A6G
REGDEX
S-3
S-3/A
S-3ASR
S-3D
S-3D/A
S-4
S-8
SC 13G
SC 13G/A
SCHEDULE 13G
SCHEDULE 13G/A
SF-1
SF-1/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| DEFA14A | DEFA14A | 0000731802-25-000077 | Dec 19, 2025 | — |
| DEFA14A | DEFA14A | 0000731802-24-000037 | Dec 20, 2024 | — |
| DEFA14A | DEFA14A | 0000731802-23-000038 | Dec 29, 2023 | — |
| DEFA14A | DEFA14A | 0001193125-22-306353 | Dec 16, 2022 | — |
| DEFA14A | DEFA14A | 0001193125-21-359870 | Dec 17, 2021 | — |
| DEFA14A | DEFA14A | 0001193125-20-320711 | Dec 18, 2020 | — |
| DEFA14A | DEFA14A | 0001193125-19-319637 | Dec 20, 2019 | — |
| DEFA14A | DEFA14A | 0001193125-18-355322 | Dec 21, 2018 | — |
| DEFA14A | DEFA14A | 0001193125-17-377203 | Dec 22, 2017 | — |
| DEFA14A | DEFA14A | 0001193125-16-802778 | Dec 23, 2016 | — |
| DEFA14A | DEFA14A | 0001193125-15-408448 | Dec 21, 2015 | — |
| DEFA14A | DEFA14A | 0001193125-14-449606 | Dec 22, 2014 | — |
| DEFA14A | DEFA14A | 0001193125-13-480099 | Dec 20, 2013 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-12-511654 | Dec 21, 2012 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-11-349732 | Dec 22, 2011 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-10-288411 | Dec 28, 2010 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-09-256479 | Dec 21, 2009 | — |
| DEFA14A | NOTICE RE AVAILABILITY OF PROXY MATERIALS | 0001193125-08-257663 | Dec 22, 2008 | — |
| DEFA14A | NOTICE RE AVAILABILITY OF PROXY MATERIALS | 0001193125-07-269875 | Dec 21, 2007 | — |
| DEFA14A | PERSONAL SOLICITATION MATERIALS | 0000950109-96-006670 | Oct 11, 1996 | — |
| DEFA14A | SCHEDULE, ADMENDMENT LETTER AND SUPPLEMENTAL | 0000950109-94-000036 | Jan 7, 1994 | — |