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Midas Edge

ALLIANT ENERGY CORP

For the period ended Mar 31, 2025. Filed May 9, 2025.

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About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Mar 31, 2025 · Filed May 9, 2025

LNT$73.46+1.1%Stored close · as of Nov 9, 2026

Extracted filing text, with the paragraph anchors used by the comparison.

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Contents

2. Regulatory Matters

NOTE 2. REGULATORY MATTERS

Regulatory Assets and Regulatory Liabilities -

Regulatory assets were comprised of the following items (in millions):

Alliant EnergyIPLWPL
March 31,2025December 31,2024March 31,2025December 31,2024March 31,2025December 31,2024
Tax-related$1,011$989$884$870$127$119
Asset retirement obligations414401289281125120
Pension and OPEB costs312315156157156158
Assets retired early1731801621681112
Commodity cost recovery5668225466
Derivatives536011154245
Non-service pension and OPEB costs535120193332
WPL’s Western Wisconsin gas distribution expansion investments4142——4142
Other16116869749294
$2,274$2,274$1,593$1,586$681$688

Derivatives -Refer to Note 10 for discussion of changes in Alliant Energy’s, IPL’s and WPL’s derivative liabilities/assets during the three months ended March 31, 2025, which resulted in comparable changes to regulatory assets/liabilities on the balance sheets.

Regulatory liabilities were comprised of the following items (in millions):

Alliant EnergyIPLWPL
March 31,2025December 31,2024March 31,2025December 31,2024March 31,2025December 31,2024
Tax-related$595$582$276$286$319$296
Cost of removal obligations341347201205140142
Derivatives615331293024
Commodity cost recovery40172712135
Other462926142015
$1,083$1,028$561$546$522$482
ContentsView on SEC.gov

The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.