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

	Page Number
Definitions	1
Forward-looking Statements	1
Website Access to Reports	3
Part I.	Item 1. Business	3
	Item 1A. Risk Factors	15
	Item 1B. Unresolved Staff Comments	21
	Item 1C. Cybersecurity	21
	Item 2. Properties	22
	Item 3. Legal Proceedings	25
	Item 4. Mine Safety Disclosures	25
	Information About Executive Officers	25
Part II.	Item 5. Market for Registrants’ Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	26
	Item 6. [Reserved]	26
	Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations	27
	Item 7A. Quantitative and Qualitative Disclosures About Market Risk	44
	Item 8. Financial Statements and Supplementary Data	44
		Alliant Energy Corporation	45
		Interstate Power and Light Company	51
		Wisconsin Power and Light Company	57
		Combined Notes to Consolidated Financial Statements	63
			1. Summary of Significant Accounting Policies	63
			2. Regulatory Matters	68
			3. Property, Plant and Equipment	71
			4. Jointly-owned Electric Utility Plant	73
			5. Receivables	73
			6. Investments	74
			7. Common Equity	75
			8. Preferred Stock	75
			9. Debt	75
			10. Leases	78
			11. Revenues	79
			12. Income Taxes	80
			13. Benefit Plans	82
			14. Asset Retirement Obligations	91
			15. Derivative Instruments	91
			16. Fair Value Measurements	92
			17. Commitments and Contingencies	94
			18. Segments of Business	97
			19. Related Parties	99
	Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure	99
	Item 9A. Controls and Procedures	100
	Item 9B. Other Information	102
	Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections	102
Part III.	Item 10. Directors, Executive Officers and Corporate Governance	102
	Item 11. Executive Compensation	102
	Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	102
	Item 13. Certain Relationships and Related Transactions, and Director Independence	103
	Item 14. Principal Accounting Fees and Services	103
Part IV.	Item 15. Exhibits, Financial Statement Schedules	104
Signatures	110

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.

About this filing

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