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Employee Count History - Alliant Energy Corporation

Historical employee count data from SEC filings.

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Employee Count History

SEC Filing History

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Filing DatePeriodEmployee CountForm TypeYoY Change
Feb 20, 2026Dec 31, 20251,70010-K-43.30%
Feb 21, 2025Dec 31, 20242,99810-K-8.63%
Feb 16, 2024Dec 31, 20233,28110-K+93.00%
Feb 24, 2023Dec 31, 20221,70010-K-48.69%
Feb 18, 2022Dec 31, 20213,31310-K-1.84%
Feb 19, 2021Dec 31, 20203,37510-K-6.17%
Feb 21, 2020
Dec 31, 2019———
Feb 22, 2019
Dec 31, 2018———
Feb 23, 2018
Dec 31, 2017———
Feb 24, 2017
Dec 31, 2016———
Feb 24, 2016
Dec 31, 2015———
Feb 25, 2015
Dec 31, 2014———
Feb 25, 2014
Dec 31, 2013———
Feb 26, 2013
Dec 31, 2012———
Feb 27, 2012
Dec 31, 2011———
Feb 28, 2011
Dec 31, 2010———
Feb 26, 2010
Dec 31, 2009———
Feb 27, 2009
Dec 31, 2008———
Feb 28, 2008
Dec 31, 2007———
Mar 1, 2007
Dec 31, 2006———
Mar 3, 2006
Dec 31, 2005———
Mar 4, 2005
Dec 31, 2004———
Mar 11, 2004
Dec 31, 2003———
Mar 26, 2003
Dec 31, 2002———
Mar 27, 2002
Dec 31, 2001———
Mar 29, 2001
Dec 31, 2000———
Mar 29, 2000
Dec 31, 1999———
Mar 29, 2000
Dec 31, 1999———
Mar 31, 1999
Dec 31, 1998———
Mar 31, 1999
Dec 31, 1998———
Apr 15, 1998
Dec 31, 1997———
Apr 15, 1998
Dec 31, 1997———
Mar 19, 1997
Dec 31, 1996———
Mar 19, 1997
Dec 31, 1996———
Mar 29, 1996
Dec 31, 1995———
Mar 29, 1996
Dec 31, 1995———
Mar 14, 1995
Dec 31, 1994———
Mar 14, 1995
Dec 31, 1994———
Feb 28, 1994
Dec 31, 1993———
Feb 28, 1994
Dec 31, 1993———