ALLIANT ENERGY CORP

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

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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, 2026 · Filed May 1, 2026

LNT$73.24-0.3%Stored close · as of Nov 10, 2026

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Contents

Alliant Energy Corporation

	For the Three Months
	Ended March 31,
	2026	2025
(in millions, except per share amounts)
Revenues:
Electric utility	$888	$853
Gas utility	271	240
Other utility	2	13
Non-utility	23	22
Total revenues	1,184	1,128
Operating expenses:
Electric production fuel and purchased power	168	175
Electric transmission service	159	158
Cost of gas sold	173	137
Other operation and maintenance	180	160
Depreciation and amortization	223	211
Taxes other than income taxes	32	30
Total operating expenses	935	871
Operating income	249	257
Other (income) and deductions:
Interest expense	142	119
Equity income from unconsolidated investments, net	(22)	(13)
Allowance for funds used during construction	(30)	(18)
Other	(4)	3
Total other (income) and deductions	86	91
Income before income taxes	163	166
Income tax benefit	(61)	(47)
Net income attributable to Alliant Energy common shareowners	$224	$213
Weighted average number of common shares outstanding:
Basic	257.4	256.8
Diluted	258.8	257.2
Earnings per weighted average common share attributable to Alliant Energy common shareowners (basic and diluted)	$0.87	$0.83

	March 31,2026	December 31,2025
(in millions, except pershare and share amounts)
ASSETS
Current assets:
Cash and cash equivalents	$115	$556
Accounts receivable, less allowance for expected credit losses	497	476
Production fuel, at weighted average cost	55	46
Gas stored underground, at weighted average cost	19	49
Materials and supplies, at weighted average cost	200	193
Regulatory assets	165	155
Other	173	222
Total current assets	1,224	1,697
Property, plant and equipment, net	20,589	20,344
Investments:
ATC Holdings	487	463
Other	237	231
Total investments	724	694
Other assets:
Regulatory assets	2,140	2,119
Deferred charges and other	136	137
Total other assets	2,276	2,256
Total assets	$24,813	$24,991

LIABILITIES AND EQUITY
Current liabilities:
Current maturities of long-term debt	$—	$1,074
Commercial paper	433	88
Other short-term borrowings	400	—
Accounts payable	459	498
Accrued interest	141	124
Regulatory liabilities	104	88
Other	241	251
Total current liabilities	1,778	2,123
Long-term debt, net (excluding current portion)	11,007	10,954
Other liabilities:
Deferred tax liabilities	2,359	2,310
Regulatory liabilities	1,086	1,113
Pension and other benefit obligations	163	173
Other	998	984
Total other liabilities	4,606	4,580
Commitments and contingencies (Note 12)
Equity:
Alliant Energy Corporation common equity:
Common stock - $0.01 par value - 480,000,000 shares authorized; 258,277,037 and 257,137,261 shares outstanding	3	3
Additional paid-in capital	3,101	3,101
Retained earnings	4,330	4,243
Accumulated other comprehensive income	2	1
Shares in deferred compensation trust - 343,622 and 367,338 shares at a weighted average cost of $39.73 and $39.05 per share	(14)	(14)
Total Alliant Energy Corporation common equity	7,422	7,334
Total liabilities and equity	$24,813	$24,991

	For the Three Months
	Ended March 31,
	2026	2025
(in millions)
Cash flows from operating activities:
Net income	$224	$213
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	223	211
Deferred tax benefit and tax credits	(57)	(51)
Other	(15)	1
Other changes in assets and liabilities:
Accounts receivable	(71)	(128)
Gas stored underground	30	39
Regulatory assets	(35)	(12)
Accounts payable	(59)	(45)
Regulatory liabilities	15	53
Deferred income taxes (a)	77	(2)
Other	36	(30)
Net cash flows from operating activities	368	249
Cash flows used for investing activities:
Construction and acquisition expenditures:
Utility business	(342)	(554)
Other	(72)	(28)
Cash receipts on sold receivables	25	192
Other	(4)	(14)
Net cash flows used for investing activities	(393)	(404)
Cash flows from (used for) financing activities:
Common stock dividends	(137)	(130)
Proceeds from issuance of other short-term borrowings	400	—
Payments to retire long-term debt	(1,075)	—
Net change in commercial paper	395	220
Other	1	9
Net cash flows from (used for) financing activities	(416)	99
Net decrease in cash, cash equivalents and restricted cash	(441)	(56)
Cash, cash equivalents and restricted cash at beginning of period	556	81
Cash, cash equivalents and restricted cash at end of period	$115	$25
Supplemental cash flows information:
Cash (paid) received during the period for:
Interest	($126)	($139)
Income taxes, net (a)	$90	$—
Significant non-cash investing and financing activities:
Accrued capital expenditures	$207	$144
Beneficial interest obtained in exchange for securitized accounts receivable	$208	$86

(a)2026 includes $90 million of proceeds from renewable tax credits transferred to other corporate taxpayers.

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