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ALLIANT ENERGY CORP — 11-K Filings

24 11-K filings on record

This page lists all 11-K filings submitted to the SEC by ALLIANT ENERGY CORP (LNT), sorted by most recent first. Each row links to the full filing on EdgarLookup. ALLIANT ENERGY CORP has filed 24 11-K documents with the SEC since 2013. To view all SEC filings by ALLIANT ENERGY CORP, see the full filings list.

Overview All Filings Financials Insiders
All 10-K 10-K/A 10-K405 10-K405/A 10-Q 10-Q/A 11-K 15-15D 25 3 3/A 35-CERT 35-CERT/A 4 4/A 424B2 424B3 424B5 5 5/A 8-A12B 8-A12B/A 8-K 8-K/A ARS CERT CORRESP CT ORDER DEF 14A DEFA14A FWP NO ACT NT 10-K NT 11-K POS AMC POSASR PRE 14A PX14A6G RW S-3 S-3/A S-3ASR S-3D S-3MEF S-4 S-4/A S-8 S-8 POS SC 13D SC 13D/A SC 13G SC 13G/A SCHEDULE 13G/A SE U-1 U-1/A U-12-IB U-13-60 U-57 U-6B-2 U-6B-2/A U-9C-3 U5A U5B U5B/A U5S U5S/A UPLOAD
Form Description Accession Number Filed Period
11-K 11-K 0000352541-25-000059 Jun 24, 2025 Dec 31, 2024
11-K 11-K 0000352541-24-000069 Jun 20, 2024 Dec 31, 2023
11-K 11-K 0000352541-23-000069 Jun 22, 2023 Dec 31, 2022
11-K 11-K 0000352541-22-000064 Jun 17, 2022 Dec 31, 2021
11-K 11-K 0000352541-21-000061 Jun 17, 2021 Dec 31, 2020
11-K 11-K 0000352541-20-000076 Jun 18, 2020 Dec 31, 2019
11-K 11-K 0000352541-19-000068 Jun 20, 2019 Dec 31, 2018
11-K 11-K 0000352541-18-000062 Jun 27, 2018 Dec 31, 2017
11-K 11-K 0000352541-17-000068 Jun 16, 2017 Dec 31, 2016
11-K 11-K 0000352541-16-000137 Jun 27, 2016 Dec 31, 2015
11-K 11-K 0000352541-15-000015 Jun 24, 2015 Dec 31, 2014
11-K 11-K 0000352541-14-000013 Jun 20, 2014 Dec 31, 2013
11-K 11-K 0000352541-13-000014 Jun 21, 2013 Dec 31, 2012
11-K 11-K 0001193125-12-280443 Jun 22, 2012 Dec 31, 2011
11-K FORM 11-K 0001193125-11-170713 Jun 22, 2011 Dec 31, 2010
11-K FORM 11-K 12/31/09 0000352541-10-000017 Jun 24, 2010 Dec 31, 2009
11-K FORM 11-K 12/31/08 0000107832-09-000004 Jun 26, 2009 Dec 31, 2008
11-K FORM 11-K 12/31/07 0000107832-08-000027 Jun 27, 2008 Dec 31, 2007
11-K FORM 11-K 12/31/06 0000107832-07-000106 Jun 29, 2007 Dec 31, 2006
11-K FORM 11-K 12-31-05 0000107832-06-000107 Jun 28, 2006 Dec 31, 2005
11-K FORM 11-K 12/31/04 0000107832-05-000136 Jun 29, 2005 Dec 31, 2004
11-K FORM 11-K 12/31/2003 0000107832-04-000172 Jun 28, 2004 Dec 31, 2003
11-K 11-K 0000107832-03-000044 Jun 30, 2003 Dec 31, 2002
11-K 11-K 0000107832-02-000051 Jul 15, 2002 Dec 31, 2001