LNT Pre-Tax Margin - ALLIANT ENERGY CORP

Complete source-backed pre-tax margin history.

Available history: 2009-12-31 to 2026-03-31
Data captured: 2026-09-04

Historical Pre-Tax Margin

Date	Pre-Tax Margin
2026-03-31	13.77%
2025-12-31	9.59%
2025-09-30	21.74%
2025-06-30	13.63%
2025-03-31	14.72%
2024-12-31	14.34%
2024-09-30	21.55%
2024-06-30	6.04%
2024-03-31	14.35%
2023-12-31	12.70%
2023-09-30	24.51%
2023-06-30	17.54%
2023-03-31	14.95%
2022-12-31	9.74%
2022-09-30	21.23%
2022-06-30	17.29%
2022-03-31	18.73%
2021-12-31	9.39%
2021-09-30	23.24%
2021-06-30	15.79%
2021-03-31	16.20%
2020-12-31	6.85%
2020-09-30	24.89%
2020-06-30	16.78%
2020-03-31	16.81%
2019-12-31	15.11%
2019-09-30	25.45%
2019-06-30	13.71%
2019-03-31	14.47%
2018-12-31	10.70%
2018-09-30	23.67%
2018-06-30	14.28%
2018-03-31	15.31%
2017-12-31	11.46%
2017-09-30	21.78%
2017-06-30	15.42%
2017-03-31	13.96%
2016-12-31	9.75%
2016-09-30	15.02%
2016-06-30	13.91%
2016-03-31	14.43%
2015-12-31	6.57%
2015-09-30	23.41%
2015-06-30	11.52%
2015-03-31	13.34%
2014-12-31	7.56%
2014-09-30	20.19%
2014-06-30	10.37%
2014-03-31	13.77%
2013-12-31	9.94%
2013-09-30	20.67%
2013-06-30	10.99%
2013-03-31	11.07%
2012-12-31	10.75%
2012-09-30	21.67%
2012-06-30	12.49%
2012-03-31	9.27%
2011-12-31	10.86%
2011-09-30	21.14%
2011-06-30	6.08%
2011-03-31	11.47%
2010-12-31	11.76%
2010-09-30	23.07%

Annual Pre-Tax Margin

Date	Pre-Tax Margin
2025-12-31	15.15%
2024-12-31	14.47%
2023-12-31	17.56%
2022-12-31	16.84%
2021-12-31	16.35%
2020-12-31	16.60%
2019-12-31	17.43%
2018-12-31	16.13%
2017-12-31	15.75%
2016-12-31	13.36%
2015-12-31	14.18%
2014-12-31	13.13%
2013-12-31	13.31%
2012-12-31	13.90%
2011-12-31	12.75%
2010-12-31	14.04%
2009-12-31	3.49%