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ALLIANT ENERGY CORP

For the period ended Mar 31, 2026. Filed May 1, 2026.

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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, 2026 · Filed May 1, 2026

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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Table of Contents

Page
Definitions
Forward-looking Statements1
Part I. Financial Information4
Item 1. Condensed Consolidated Financial Statements (Unaudited)4
Alliant Energy Corporation4
Interstate Power and Light Company7
Wisconsin Power and Light Company10
Combined Notes to Condensed Consolidated Financial Statements13
1. Summary of Significant Accounting Policies13
2. Regulatory Matters13
3. Receivables13
4. Investments14
5. Common Equity14
6. Debt17
7. Revenues18
8. Income Taxes18
9. Benefit Plans19
10. Derivative Instruments20
11. Fair Value Measurements21
12. Commitments and Contingencies22
13. Segments of Business24
14. Related Parties25
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations26
Item 3. Quantitative and Qualitative Disclosures About Market Risk31
Item 4. Controls and Procedures31
Part II. Other Information31
Item 1. Legal Proceedings32
Item 1A. Risk Factors32
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds32
Item 5. Other Information32
Item 6. Exhibits33
Signatures33
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.