ALLIANT ENERGY CORP

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

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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

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Contents

. Segments of Business

NOTE 13. SEGMENTS OF BUSINESS

Certain financial information relating to Alliant Energy’s, IPL’s and WPL’s reportable segments, which represents the services provided to their customers, and reconciliation to consolidated amounts, was as follows (in millions):

	Utility
Total · Alliant
Reportable · Energy
Three Months Ended March 31, 2025	IPL	WPL	Segments	Other	Consolidated
Electric utility revenues	$430	$423	$853	N/A	$853
Gas utility revenues	118	122	240	N/A	240
Other revenues	12	1	13	$22	35
Total revenues	560	546	1,106	22	1,128
Electric production fuel and purchased power expense	67	108	175	N/A	175
Electric transmission service expense	108	50	158	N/A	158
Cost of gas sold expense	65	72	137	N/A	137
Other operation and maintenance expense	82	67	149	11	160
Other segment items:
Depreciation and amortization expense	115	93	208	3	211
Interest expense	47	43	90	29	119
Equity income from unconsolidated investments, net	—	—	—	(13)	(13)
Income tax benefit	(40)	(5)	(45)	(2)	(47)
Other (a)	6	8	14	1	15
Net income (loss)	110	110	220	(7)	213
Total assets	11,540	10,101	21,641	1,210	22,851
Investments in equity method subsidiaries	5	17	22	611	633
Construction and acquisition expenditures	376	178	554	28	582

	Utility
Total · Alliant
Three Months Ended March 31, 2024 (amounts may not foot due to rounding) · Reportable · Energy
IPL · WPL · Segments · Other · Consolidated
Electric utility revenues	$392	$399	$791	N/A	$791
Gas utility revenues	108	97	205	N/A	205
Other revenues	13	—	13	$22	35
Total revenues	513	496	1,009	22	1,031
Electric production fuel and purchased power expense	67	96	163	N/A	163
Electric transmission service expense	103	49	152	N/A	152
Cost of gas sold expense	60	53	113	N/A	114
Other operation and maintenance expense	86	63	149	11	160
Other segment items:
Depreciation and amortization expense	96	90	186	3	189
Interest expense	42	41	83	24	107
Equity income from unconsolidated investments, net	—	—	—	(15)	(15)
Income tax expense (benefit)	(10)	6	(4)	(6)	(10)
Other (a)	6	6	12	2	13
Net income	63	92	155	3	158
Total assets	10,532	9,581	20,113	1,135	21,248
Investments in equity method subsidiaries	5	16	21	573	594
Construction and acquisition expenditures	253	225	478	32	510

(a)Other segment items for each reportable segment include allowance for funds used during construction, taxes other than income taxes, interest income, and other miscellaneous income and deductions.

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