ALLIANT ENERGY CORP

For the period ended Sep 30, 2026. Filed Oct 30, 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.

Sep 30, 2026 · Filed Oct 30, 2026

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

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Contents

Wisconsin Power and Light Company

For the Three Months · For the Nine Months
	Ended September 30,		Ended September 30,
	2026	2025	2026	2025
(in millions)
Revenues:
Electric utility	$571	$516	$1,452	$1,373
Gas utility	24	24	211	181
Other	—	—	2	1
Total revenues	595	540	1,665	1,555
Operating expenses:
Electric production fuel and purchased power	133	133	324	351
Electric transmission service	57	51	170	152
Cost of gas sold	3	5	117	91
Other operation and maintenance	103	84	273	222
Depreciation and amortization	98	92	296	275
Taxes other than income taxes	17	13	47	42
Total operating expenses	411	378	1,227	1,133
Operating income	184	162	438	422
Other (income) and deductions:
Interest expense	49	43	146	129
Allowance for funds used during construction	(12)	(9)	(34)	(28)
Other	(1)	4	(2)	9
Total other (income) and deductions	36	38	110	110
Income before income taxes	148	124	328	312
Income tax expense (benefit)	(8)	1	(23)	(9)
Net income	$156	$123	$351	$321

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

	September 30,2026	December 31,2025
(in millions, except pershare and share amounts)
ASSETS
Current assets:
Cash and cash equivalents	$13	$37
Accounts receivable, less allowance for expected credit losses	251	273
Production fuel, at weighted average cost	33	28
Gas stored underground, at weighted average cost	26	25
Materials and supplies, at weighted average cost	97	81
Regulatory assets	106	96
Prepaid gross receipts tax	42	52
Other	39	59
Total current assets	607	651
Property, plant and equipment, net	9,952	9,363
Other assets:
Regulatory assets	527	562
Deferred charges and other	37	79
Total other assets	564	641
Total assets	$11,123	$10,655

LIABILITIES AND EQUITY
Current liabilities:
Commercial paper	$143	$—
Accounts payable	241	197
Accrued interest	46	46
Regulatory liabilities	24	47
Other	113	105
Total current liabilities	567	395
Long-term debt, net	3,672	3,669
Other liabilities:
Deferred tax liabilities	881	861
Regulatory liabilities	487	568
Pension and other benefit obligations	44	75
Other	810	712
Total other liabilities	2,222	2,216
Commitments and contingencies (Note 12)
Equity:
Wisconsin Power and Light Company common equity:
Common stock - $5 par value - 18,000,000 shares authorized; 13,236,601 shares outstanding	66	66
Additional paid-in capital	2,713	2,613
Retained earnings	1,883	1,696
Total Wisconsin Power and Light Company common equity	4,662	4,375
Total liabilities and equity	$11,123	$10,655

	For the Nine Months
	Ended September 30,
	2026	2025
(in millions)
Cash flows from operating activities:
Net income	$351	$321
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	296	275
Deferred tax benefit and tax credits	(85)	(60)
Other	2	(2)
Other changes in assets and liabilities:
Regulatory liabilities	(43)	96
Other (a)	91	(57)
Net cash flows from operating activities	612	573
Cash flows used for investing activities:
Construction and acquisition expenditures	(732)	(511)
Other	18	(19)
Net cash flows used for investing activities	(714)	(530)
Cash flows from (used for) financing activities:
Common stock dividends	(164)	(163)
Capital contributions from parent	100	80
Net change in commercial paper	143	9
Other	(1)	(9)
Net cash flows from (used for) financing activities	78	(83)
Net decrease in cash, cash equivalents and restricted cash	(24)	(40)
Cash, cash equivalents and restricted cash at beginning of period	37	51
Cash, cash equivalents and restricted cash at end of period	$13	$11
Supplemental cash flows information:
Cash paid during the period for:
Interest	($146)	($136)
Income taxes, net (a)	($25)	($7)
Significant non-cash investing and financing activities:
Accrued capital expenditures	$132	$89

(a)2026 and 2025 include $44 million and $27 million, respectively, 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.