ALLIANT ENERGY CORP

For the period ended Dec 31, 2023. Filed Feb 16, 2024.

About this filing

A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2023 · Filed Feb 16, 2024

LNT$72.67-1.0%Stored close · as of Nov 6, 2026

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Contents

Part I

This report includes information relating to Alliant Energy, IPL and WPL (as well as AEF and Corporate Services). Where appropriate, information relating to a specific entity has been segregated and labeled as such. Unless otherwise noted, the information herein excludes discontinued operations for all periods presented. The terms “we,” “our” and “us” used in this report refer collectively to Alliant Energy, IPL and WPL.

ContentsView on SEC.gov

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