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

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Contents

Interstate Power and Light Company

	For the Three Months
	Ended March 31,
	2026	2025
(in millions)
Revenues:
Electric utility	$437	$430
Gas utility	122	118
Steam and other	2	12
Total revenues	561	560
Operating expenses:
Electric production fuel and purchased power	64	67
Electric transmission service	104	108
Cost of gas sold	74	65
Other operation and maintenance	87	82
Depreciation and amortization	120	115
Taxes other than income taxes	15	15
Total operating expenses	464	452
Operating income	97	108
Other (income) and deductions:
Interest expense	57	47
Allowance for funds used during construction	(19)	(9)
Other	(3)	—
Total other (income) and deductions	35	38
Income before income taxes	62	70
Income tax benefit	(32)	(40)
Net income	$94	$110

Earnings per share data is not disclosed given Alliant Energy Corporation is the sole shareowner of all shares of IPL’s common stock outstanding during the periods presented.

	March 31,2026	December 31,2025
(in millions, except pershare and share amounts)
ASSETS
Current assets:
Cash and cash equivalents	$12	$7
Accounts receivable, less allowance for expected credit losses	231	185
Production fuel, at weighted average cost	23	18
Gas stored underground, at weighted average cost	7	24
Materials and supplies, at weighted average cost	116	111
Regulatory assets	64	59
Other	36	58
Total current assets	489	462
Property, plant and equipment, net	10,542	10,436
Other assets:
Regulatory assets	1,571	1,557
Deferred charges and other	39	40
Total other assets	1,610	1,597
Total assets	$12,641	$12,495

LIABILITIES AND EQUITY
Current liabilities:
Commercial paper	$1	$88
Accounts payable	182	232
Accounts payable to associated companies	51	45
Accrued taxes	63	53
Accrued interest	54	47
Regulatory liabilities	54	41
Other	77	80
Total current liabilities	482	586
Long-term debt, net	4,731	4,680
Other liabilities:
Deferred tax liabilities	1,309	1,278
Regulatory liabilities	529	545
Pension and other benefit obligations	28	30
Other	539	532
Total other liabilities	2,405	2,385
Commitments and contingencies (Note 12)
Equity:
Interstate Power and Light Company common equity:
Common stock - $2.50 par value - 24,000,000 shares authorized; 13,370,788 shares outstanding	33	33
Additional paid-in capital	3,622	3,497
Retained earnings	1,368	1,314
Total Interstate Power and Light Company common equity	5,023	4,844
Total liabilities and equity	$12,641	$12,495

	For the Three Months
	Ended March 31,
	2026	2025
(in millions)
Cash flows from operating activities:
Net income	$94	$110
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	120	115
Deferred tax benefit and tax credits	(29)	(30)
Other	(16)	(6)
Other changes in assets and liabilities:
Accounts receivable	(91)	(112)
Regulatory assets	(24)	(18)
Accounts payable	(28)	(21)
Deferred income taxes (a)	50	17
Other	60	4
Net cash flows from operating activities	136	59
Cash flows used for investing activities:
Construction and acquisition expenditures	(198)	(376)
Cash receipts on sold receivables	25	192
Other	(6)	(6)
Net cash flows used for investing activities	(179)	(190)
Cash flows from financing activities:
Common stock dividends	(40)	(89)
Capital contributions from parent	125	45
Net change in commercial paper	(37)	159
Other	—	(1)
Net cash flows from financing activities	48	114
Net increase (decrease) in cash, cash equivalents and restricted cash	5	(17)
Cash, cash equivalents and restricted cash at beginning of period	7	29
Cash, cash equivalents and restricted cash at end of period	$12	$12
Supplemental cash flows information:
Cash (paid) received during the period for:
Interest	($50)	($58)
Income taxes, net (a)	$47	$—
Significant non-cash investing and financing activities:
Accrued capital expenditures	$76	$81
Beneficial interest obtained in exchange for securitized accounts receivable	$208	$86

(a)2026 includes $47 million of proceeds from renewable tax credits transferred to other corporate taxpayers.

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.