Alliant Energy Corp (LNT): Shares Outstanding

Annual figures by period end, from SEC filings.

Stock splits: 2-for-1, first reflected in a filing dated 2016-08-02. Figures are as filed: per-share figures and share counts last reported before a split are on the old share basis, so changes and growth rates across a split are not shown. Splits are read from the filings' own restatements, so a share conversion in a merger or reorganization shows up the same way.

257.14M

As of 2025-12-31

258.28M

As of 2026-03-31

+0.8%

3-year compound annual growth

+0.6%

5-year compound annual growth

+1.3%

10-year compound annual growth

2009-12-31 Shares Outstanding (shares) 2025-12-31

Paler bars were last filed before a stock split, on the old share basis.

Period ended	Shares Outstanding	Change YoY	Source filing
2025-12-31	257.14M	+0.2%	2026-02-20, Balance as of period end
2024-12-31	256.69M	+0.2%	2026-02-20, Balance as of period end
2023-12-31	256.10M	+2.0%	2026-02-20, Balance as of period end
2022-12-31	251.13M	+0.3%	2025-02-21, Balance as of period end
2021-12-31	250.47M	+0.2%	2024-02-16, Balance as of period end
2020-12-31	249.87M	+2.0%	2023-02-24, Balance as of period end
2019-12-31	245.02M	+3.8%	2022-02-18, Balance as of period end
2018-12-31	236.06M	+2.0%	2021-02-19, Balance as of period end
2017-12-31	231.35M	+1.6%	2020-02-21, Balance as of period end
2016-12-31	227.67M	+0.3%	2019-02-22, Balance as of period end
2015-12-31	226.92M	+2.3%	2018-02-23, Balance as of period end
2014-12-31	221.87M	n/c	2017-02-24, Balance as of period end
2013-12-31	110.94M	0.0%	2016-02-24, Balance as of period end
2012-12-31	110.99M	0.0%	2015-02-25, Balance as of period end
2011-12-31	111.02M	+0.1%	2014-02-25, Balance as of period end
2010-12-31	110.89M	+0.2%	2013-02-26, Balance as of period end
2009-12-31	110.66M	n/a	2012-02-27, Balance as of period end