UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended ~~March 31,~~September 30, 2022

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Name of Registrant, State of Incorporation, Address of Principal Executive Offices, Telephone Number, Commission File Number, IRS Employer Identification Number

ALLIANT ENERGY CORPORATION

(a Wisconsin Corporation)

4902 N. Biltmore Lane

Madison, Wisconsin 53718

Telephone (608) 458-3311

Commission File Number - 1-9894

IRS Employer Identification Number - 39-1380265

INTERSTATE POWER & LIGHT COMPANY

(an Iowa corporation)

Alliant Energy Tower

Cedar Rapids, Iowa 52401

Telephone (319) 786-4411

Commission File Number - 1-4117

IRS Employer Identification Number - 42-0331370

WISCONSIN POWER & LIGHT COMPANY

(a Wisconsin corporation)

4902 N. Biltmore Lane

Madison, Wisconsin 53718

Telephone (608) 458-3311

Commission File Number - 0-337

IRS Employer Identification Number - 39-0714890

This combined Form 10-Q is separately filed by Alliant Energy Corporation, Interstate Power and Light Company and Wisconsin Power and Light Company. Information contained in the Form 10-Q relating to Interstate Power and Light Company and Wisconsin Power and Light Company is filed by each such registrant on its own behalf. Each of Interstate Power and Light Company and Wisconsin Power and Light Company makes no representation as to information relating to registrants other than itself.

Securities registered pursuant to Section 12(b) of the Act:

Alliant Energy Corporation, Common Stock, $0.01 Par Value, Trading Symbol LNT, Nasdaq Global Select Market

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Alliant Energy Corporation - Yes ☒ No ☐

Interstate Power and Light Company - Yes ☒ No ☐

Wisconsin Power and Light Company - Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

Alliant Energy Corporation - Yes ☒ No ☐

Interstate Power and Light Company - Yes ☒ No ☐

Wisconsin Power and Light Company - Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Alliant Energy Corporation - Large Accelerated Filer ☒ Accelerated Filer ☐ Non-accelerated Filer ☐ Smaller Reporting Company ☐ Emerging Growth Company ☐

Interstate Power and Light Company - Large Accelerated Filer ☐ Accelerated Filer ☐ Non-accelerated Filer ☒ Smaller Reporting Company ☐ Emerging Growth Company ☐

Wisconsin Power and Light Company - Large Accelerated Filer ☐ Accelerated Filer ☐ Non-accelerated Filer ☒ Smaller Reporting Company ☐ Emerging Growth Company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

Alliant Energy Corporation ☐

Interstate Power and Light Company ☐

Wisconsin Power and Light Company ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Alliant Energy Corporation - Yes ☐ No ☒

Interstate Power and Light Company - Yes ☐ No ☒

Wisconsin Power and Light Company - Yes ☐ No ☒

Number of shares outstanding of each class of common stock as of ~~March 31,~~September 30, 2022:

Alliant Energy Corporation, Common Stock, $0.01 par value, ~~250,813,728~~ 251,021,830 shares outstanding

Interstate Power and Light Company, Common Stock, $2.50 par value, 13,370,788 shares outstanding (all outstanding shares are owned beneficially and of record by Alliant Energy Corporation)

Wisconsin Power and Light Company, Common Stock, $5 par value, 13,236,601 shares outstanding (all outstanding shares are owned beneficially and of record by Alliant Energy Corporation)

Table of Contents

TABLE OF CONTENTS


			Page
Definitions			1
Forward-looking Statements			1
Part I. Financial Information			3
Item 1. Condensed Consolidated Financial Statements (Unaudited)			3
Alliant Energy Corporation			3
Interstate Power and Light Company			6
Wisconsin Power and Light Company			9
Combined Notes to Condensed Consolidated Financial Statements			12
1. Summary of Significant Accounting Policies			12
2. Regulatory Matters			1213

3. Property, Plant and Equipment			13
4 . Receivables			13
4.5 . Investments			13
~~5. Common Equity~~			1314
6 . ~~Debt~~Common Equity			1514

7 . ~~Revenues~~Debt			1517
8 . ~~Income Taxes~~Revenues			1518
9 . Income Taxes			18
10 . Benefit Plans			1619

1 01 . Derivative Instruments			17
1 1 ~~. Fair Value Measurements~~			1820
1 2 . ~~Commitments and Contingencies~~			19
1 3 ~~. Segments of Business~~Fair Value Measurements			21
1 3 . Commitments and Contingencies			24
1 4 . Segments of Business			26
1 5 . Related Parties			2127

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations			2227
Item 3. Quantitative and Qualitative Disclosures About Market Risk			2736
Item 4. Controls and Procedures			2736
Part II. Other Information			2736
Item 1. Legal Proceedings			2736
Item 1A. Risk Factors			2736
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds			2736
Item 5. Other Information			36
Item 6. Exhibits			2837
Signatures			2837

Table of Contents

DEFINITIONS

The following abbreviations or acronyms used in this report are defined below:


Abbreviation or Acronym	Definition	Abbreviation or Acronym	Definition
2021 Form 10-K	Combined Annual Report on Form 10-K filed by Alliant Energy, IPL and WPL for the year ended Dec. 31, 2021	IPL	Interstate Power and Light Company
AEF	Alliant Energy Finance, LLC	IUB	Iowa Utilities Board
AFUDC	Allowance for funds used during construction	MDA	Management’s Discussion and Analysis of Financial Condition and Results of Operations
Alliant Energy	Alliant Energy Corporation	MISO	Midcontinent Independent System Operator, Inc.
ATC	American Transmission Company LLC	MW	Megawatt
ATC Holdings	Interest in American Transmission Company LLC and ATC Holdco LLC	MWh	Megawatt-hour
Corporate Services	Alliant Energy Corporate Services, Inc.	N/A	Not applicable
DAEC	Duane Arnold Energy Center	Note(s)	Combined Notes to Condensed Consolidated Financial Statements
Dth	Dekatherm	OPEB	Other postretirement benefits
EGU	Electric generating unit	PPA	Purchased power agreement
EPA	U.S. Environmental Protection Agency	PSCW	Public Service Commission of Wisconsin
EPS	Earnings per weighted average common share	SEC	Securities and Exchange Commission
FERC	Federal Energy Regulatory Commission	U.S.	United States of America
Financial Statements	Condensed Consolidated Financial Statements	West Riverside	West Riverside Energy Center
FTR	Financial transmission right	Whiting Petroleum	Whiting Petroleum Corporation
GAAP	U.S. generally accepted accounting principles	WPL	Wisconsin Power and Light Company

FORWARD-LOOKING STATEMENTS

Statements contained in this report that are not of historical fact are forward-looking statements intended to qualify for the safe harbors from liability established by the Private Securities Litigation Reform Act of 1995. These forward-looking statements can be identified as such because the statements include words such as “may,” “believe,” “expect,” “anticipate,” “plan,” “project,” “will,” “projections,” “estimate,” or other words of similar import. Similarly, statements that describe future financial performance or plans or strategies are forward-looking statements. Such forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from those expressed in, or implied by, such statements. Some, but not all, of the risks and uncertainties of Alliant Energy, IPL and WPL that could materially affect actual results include:

•the direct or indirect effects resulting from terrorist incidents, including physical attacks and cyber attacks, or responses to such incidents;

•the impact of penalties or third-party claims related to, or in connection with, a failure to maintain the security of personally identifiable information, including associated costs to notify affected persons and to mitigate their information security concerns;

•~~the direct or indirect effects resulting from terrorist incidents, including physical attacks and cyber attacks, or responses to such incidents;~~

•the impact of customer- and third party-owned generation, including alternative electric suppliers, in IPL’s and WPL’s service territories on system reliability, operating expenses and customers’ demand for electricity;

•the impact of energy efficiency, franchise retention and customer disconnects on sales volumes and margins;

•the impact that price changes may have on IPL’s and WPL’s customers’ demand for electric, gas and steam services and their ability to pay their bills;

•inflation and higher interest rates;

•changes in the price of delivered natural gas, transmission, purchased electricity and coal, particularly during elevated market prices, and any resulting changes to counterparty credit risk, due to shifts in supply and demand caused by market conditions, regulations and MISO’s seasonal resource adequacy process;

•IPL’s and WPL’s ability to obtain adequate and timely rate relief to allow for, among other things, the recovery of and/or the return on costs, including fuel costs, operating costs, transmission costs, deferred expenditures, deferred tax assets, tax expense, capital expenditures, and remaining costs related to EGUs that may be permanently closed and certain other retired assets, decreases in sales volumes, earning their authorized rates of return, and the payments to their parent of expected levels of dividends;

•~~federal and state regulatory or governmental actions, including the impact of legislation, and regulatory agency orders;~~

•~~the ability to utilize tax credits and net operating losses generated to date, and those that may be generated in the future, before they expire;~~

•~~the impacts of changes in the tax code, including tax rates, minimum tax rates, and adjustments made to deferred tax assets and liabilities;~~

•the ability to complete construction of renewable generation and storage projects by planned in-service dates and within the cost targets set by regulators due to cost increases of and access to materials, equipment and commodities including due to tariffs, duties or other assessments, such as any additional tariffs resulting from U.S. Department of Commerce investigations into the sourcing of solar project materials and equipment from certain countries, labor issues or supply shortages, the ability to successfully resolve warranty issues or contract disputes, the ability to achieve the expected level of tax benefits based on tax guidelines and project costs, and the ability to efficiently utilize the renewable generation and storage project tax benefits for the benefit of customers;

•federal and state regulatory or governmental actions, including the impact of legislation, and regulatory agency orders;

•the ability to utilize tax credits and net operating losses generated to date, and those that may be generated in the future, before they expire, as well as the ability to transfer tax credits that may be generated in the future at adequate pricing;

•the impacts of changes in the tax code, including tax rates, minimum tax rates, and adjustments made to deferred tax assets and liabilities;


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Table of Contents

•employee workforce factors, including ~~changes in key executives,~~the ability to hire and retain employees with specialized skills, impacts from employee retirements, changes in key executives, ability to create desired corporate culture, collective bargaining agreements and negotiations, work stoppages or restructurings;

•disruptions in the supply and delivery of natural gas, purchased electricity and coal;

•changes to the creditworthiness of, or performance of obligations by, counterparties with which Alliant Energy, IPL and WPL have contractual arrangements, including participants in the energy markets and fuel suppliers and transporters;

•any material post-closing ~~payments~~payments related to any past asset divestitures, including the sale of Whiting Petroleum, which could result from, among other things, indemnification agreements, warranties, guarantees or litigation;


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~~Table of Contents~~

•weather effects on results of utility operations;

•disruptions to ongoing operations and the supply of materials, services, equipment and commodities needed to construct solar generation, battery storage and electric and gas distribution projects, which may result from geopolitical issues, supplier manufacturing constraints, labor issues or transportation issues, as well as affect the ability to meet capacity requirements and result in increased capacity expense;

•continued access to the capital markets on competitive terms and rates, and the actions of credit rating agencies;

•the direct or indirect effects resulting from the ongoing novel coronavirus (COVID-19) pandemic and the spread of variant strains, including any vaccine mandates and testing requirements, on sales volumes, margins, operations, employees, labor markets, contractors, vendors, the ability to complete construction projects, supply chains, customers’ inability to pay bills, suspension of disconnects, the market value of the assets that fund pension plans and the potential for additional funding requirements, the ability of counterparties to meet their obligations, compliance with regulatory requirements, the ability to implement regulatory plans, economic conditions and access to capital markets;strains;

•issues associated with environmental remediation and environmental compliance, including compliance with all environmental and emissions permits, the Coal Combustion Residuals Rule, future changes in environmental laws and regulations, including federal, state or local regulations for carbon dioxide emissions reductions from new and existing fossil-fueled EGUs, and litigation associated with environmental requirements;

•increased pressure from customers, investors and other stakeholders to more rapidly reduce carbon dioxide emissions;

•the ability to defend against environmental claims brought by state and federal agencies, such as the EPA, state natural resources agencies or third parties, such as the Sierra Club, and the impact on operating expenses of defending and resolving such claims;

•~~continued access to the capital markets on competitive terms and rates, and the actions of credit rating agencies;~~

•~~inflation and interest rates;~~

•disruptions to the supply of materials, equipment and commodities needed to construct solar generation and storage projects and maintain ongoing operations, including due to geopolitical issues, shortages, labor issues or transportation issues, which may, among other potential impacts, affect the ability to meet capacity requirements and result in increased capacity expense;

•~~possible~~ changes to MISO’s methodology establishing capacity planning reserve margin and capacity accreditation requirements that may impact how and when new generating facilities such as IPL’s and WPL’s additional solar generation may be accredited with energy capacity and may require IPL and WPL to adjust their current resource plans, the need to add resources to comply with MISO’s ~~proposal,~~methodology, or procure capacity in the market whereby such costs might not be recovered in rates;

•changes in the price of delivered natural gas, transmission, purchased electricity and coal, and any resulting changes to counterparty credit risk, due to shifts in supply and demand caused by market conditions, regulations and MISO’s annual resource adequacy process;

•~~disruptions in the supply and delivery of natural gas, purchased electricity and coal;~~

•the direct or indirect effects resulting from breakdown or failure of equipment in the operation of electric and gas distribution systems, such as mechanical problems and explosions or fires, and compliance with electric and gas transmission and distribution safety regulations, including regulations promulgated by the Pipeline and Hazardous Materials Safety Administration;

•issues related to the availability and operations of EGUs, including start-up risks, breakdown or failure of equipment, availability of warranty coverage for equipment breakdowns or failures, performance below expected or contracted levels of output or efficiency, operator error, employee safety, transmission constraints, compliance with mandatory reliability standards and risks related to recovery of resulting incremental operating, fuel-related and capital costs through rates;

•impacts that excessive heat, excessive cold, storms or natural disasters may have on Alliant Energy’s, IPL’s and WPL’s operations and recovery of costs associated with restoration activities or on the operations of Alliant Energy’s investments;

•Alliant Energy’s ability to sustain its dividend payout ratio goal;

•changes to costs of providing benefits and related funding requirements of pension and OPEB plans due to the market value of the assets that fund the plans, economic conditions, financial market performance, interest rates, timing and form of benefits payments, life expectancies and demographics;

•material changes in employee-related benefit and compensation ~~costs;~~costs, including settlement losses related to pension plans;

•risks associated with operation and ownership of non-utility holdings;

•changes in technology that alter the channels through which customers buy or utilize Alliant Energy’s, IPL’s or WPL’s products and services;

•impacts on equity income from unconsolidated investments from changes in valuations ~~and~~of the assets held, as well as potential changes to ATC’s authorized return on equity;

•impacts of IPL’s future tax benefits from Iowa rate-making practices, including deductions for repairs expenditures, allocation of mixed service costs and state depreciation, and recoverability of the associated regulatory assets from customers, when the differences reverse in future periods;

•changes to the creditworthiness of counterparties with which Alliant Energy, IPL and WPL have contractual arrangements, including participants in the energy markets and fuel suppliers and transporters;

•current or future litigation, regulatory investigations, proceedings or inquiries;

•reputational damage from negative publicity, protests, fines, penalties and other negative consequences resulting in regulatory and/or legal actions;

•the effect of accounting standards issued periodically by standard-setting bodies;

•the ability to successfully complete tax audits and changes in tax accounting methods with no material impact on earnings and cash flows; and

•other factors listed in MDA and Risk Factors in Item 1A in the 2021 Form 10-K.

Alliant Energy, IPL and WPL each assume no obligation, and disclaim any duty, to update the forward-looking statements in this report, except as required by law.


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Table of Contents

PART I. FINANCIAL INFORMATION

ITEM 1. CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

ALLIANT ENERGY CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)


		For the Three Months			For the Three Months			For the Nine Months
		Ended March 31,			Ended September 30,			Ended September 30,
		2022	2021				2022	2021	2022	2021
		(in millions, except per share amounts)		(in millions, except per share amounts)
Revenues:	Revenues:					Revenues:
Electric utility	Electric utility	$773	$701			Electric utility	$1,039	$939	$2,624	$2,357
Gas utility	Gas utility	262	170			Gas utility	62	50	418	289
Other utility	Other utility	11	13			Other utility	11	13	35	36
Non-utility	Non-utility	22	17			Non-utility	23	22	70	60
Total revenues	Total revenues	1,068	901			Total revenues	1,135	1,024	3,147	2,742
Operating expenses:	Operating expenses:					Operating expenses:
Electric production fuel and purchased power	Electric production fuel and purchased power	168	133			Electric production fuel and purchased power	274	207	633	478
Electric transmission service	Electric transmission service	138	134			Electric transmission service	157	148	428	403
Cost of gas sold	Cost of gas sold	168	100			Cost of gas sold	26	18	242	149
Other operation and maintenance	Other operation and maintenance	153	146			Other operation and maintenance	172	171	492	477
Depreciation and amortization	Depreciation and amortization	166	164			Depreciation and amortization	169	165	501	494
Taxes other than income taxes	Taxes other than income taxes	27	26			Taxes other than income taxes	28	26	82	78
Total operating expenses	Total operating expenses	820	703			Total operating expenses	826	735	2,378	2,079
Operating income	Operating income	248	198			Operating income	309	289	769	663
Other (income) and deductions:	Other (income) and deductions:					Other (income) and deductions:
Interest expense	Interest expense	74	69			Interest expense	83	68	235	206
Equity income from unconsolidated investments, net	Equity income from unconsolidated investments, net	(15)	(15)			Equity income from unconsolidated investments, net	(5)	(13)	(37)	(47)
Allowance for funds used during construction	Allowance for funds used during construction	(11)	(4)			Allowance for funds used during construction	(10)	(7)	(34)	(16)
Other	Other	—	2			Other	—	3	—	7
Total other (income) and deductions	Total other (income) and deductions	48	52			Total other (income) and deductions	68	51	164	150
Income before income taxes	Income before income taxes	200	146			Income before income taxes	241	238	605	513
Income tax expense (benefit)	Income tax expense (benefit)	8	(28)			Income tax expense (benefit)	14	(21)	26	(66)

Net income	Net income	192	174			Net income	227	259	579	579
Preferred dividend requirements of Interstate Power and Light Company	Preferred dividend requirements of Interstate Power and Light Company	—	3			Preferred dividend requirements of Interstate Power and Light Company	—	3	—	8
Net income attributable to Alliant Energy common shareowners	Net income attributable to Alliant Energy common shareowners	$192	$171			Net income attributable to Alliant Energy common shareowners	$227	$256	$579	$571
Weighted average number of common shares outstanding:	Weighted average number of common shares outstanding:					Weighted average number of common shares outstanding:
Basic	Basic	250.6	250.0			Basic	251.0	250.3	250.8	250.2
Diluted	Diluted	250.9	250.4			Diluted	251.3	250.8	251.1	250.6

Earnings per weighted average common share attributable to Alliant Energy common shareowners (basic and diluted)	Earnings per weighted average common share attributable to Alliant Energy common shareowners (basic and diluted)	$0.77	$0.68			Earnings per weighted average common share attributable to Alliant Energy common shareowners (basic and diluted)	$0.90	$1.02	$2.31	$2.28

Refer to accompanying Combined Notes to Condensed Consolidated Financial Statements.


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ALLIANT ENERGY CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)


		March 31, 2022	December 31, 2021		September 30, 2022	December 31, 2021
		(in millions, except per share and share amounts)			(in millions, except per share and share amounts)
ASSETS	ASSETS			ASSETS
Current assets:	Current assets:			Current assets:
Cash and cash equivalents	Cash and cash equivalents	$67	$39	Cash and cash equivalents	$344	$39
Accounts receivable, less allowance for expected credit losses	Accounts receivable, less allowance for expected credit losses	481	440	Accounts receivable, less allowance for expected credit losses	509	440

Production fuel, at weighted average cost	Production fuel, at weighted average cost	39	51	Production fuel, at weighted average cost	49	51
Gas stored underground, at weighted average cost	Gas stored underground, at weighted average cost	27	82	Gas stored underground, at weighted average cost	124	82
Materials and supplies, at weighted average cost	Materials and supplies, at weighted average cost	119	113	Materials and supplies, at weighted average cost	126	113
Regulatory assets	Regulatory assets	88	104	Regulatory assets	177	104

Other	Other	271	240	Other	364	240
Total current assets	Total current assets	1,092	1,069	Total current assets	1,693	1,069
Property, plant and equipment, net	Property, plant and equipment, net	15,192	14,987	Property, plant and equipment, net	15,858	14,987
Investments:	Investments:			Investments:
ATC Holdings	ATC Holdings	346	338	ATC Holdings	351	338
Other	Other	187	179	Other	200	179
Total investments	Total investments	533	517	Total investments	551	517
Other assets:	Other assets:			Other assets:
Regulatory assets	Regulatory assets	1,831	1,836	Regulatory assets	1,864	1,836
Deferred charges and other	Deferred charges and other	191	144	Deferred charges and other	239	144
Total other assets	Total other assets	2,022	1,980	Total other assets	2,103	1,980
Total assets	Total assets	$18,839	$18,553	Total assets	$20,205	$18,553


LIABILITIES AND EQUITY	LIABILITIES AND EQUITY			LIABILITIES AND EQUITY
Current liabilities:	Current liabilities:			Current liabilities:
Current maturities of long-term debt	Current maturities of long-term debt	$333	$633	Current maturities of long-term debt	$658	$633
Commercial paper	Commercial paper	276	515	Commercial paper	383	515

Accounts payable	Accounts payable	383	436	Accounts payable	786	436
Accrued taxes	Accrued taxes	66	58	Accrued taxes	86	58
Regulatory liabilities	Regulatory liabilities	251	186	Regulatory liabilities	229	186
Other	Other	212	226	Other	280	226
Total current liabilities	Total current liabilities	1,521	2,054	Total current liabilities	2,422	2,054
Long-term debt, net (excluding current portion)	Long-term debt, net (excluding current portion)	7,383	6,735	Long-term debt, net (excluding current portion)	7,570	6,735
Other liabilities:	Other liabilities:			Other liabilities:
Deferred tax liabilities	Deferred tax liabilities	1,958	1,927	Deferred tax liabilities	1,919	1,927
Regulatory liabilities	Regulatory liabilities	1,121	1,085	Regulatory liabilities	1,158	1,085
Pension and other benefit obligations	Pension and other benefit obligations	363	374	Pension and other benefit obligations	349	374
Other	Other	416	388	Other	522	388
Total other liabilities	Total other liabilities	3,858	3,774	Total other liabilities	3,948	3,774
Commitments and contingencies (Note 12)		0	0
Commitments and contingencies (Note 1 3)				Commitments and contingencies (Note 1 3)
Equity:	Equity:			Equity:
Alliant Energy Corporation common equity:	Alliant Energy Corporation common equity:			Alliant Energy Corporation common equity:
Common stock - $0.01 par value - 480,000,000 shares authorized; 250,813,728 and 250,474,529 shares outstanding		3	3
Common stock - $0.01 par value - 480,000,000 shares authorized; 251,021,830 and 250,474,529 shares outstanding				Common stock - $0.01 par value - 480,000,000 shares authorized; 251,021,830 and 250,474,529 shares outstanding	3	3
Additional paid-in capital	Additional paid-in capital	2,750	2,749	Additional paid-in capital	2,767	2,749
Retained earnings	Retained earnings	3,336	3,250	Retained earnings	3,508	3,250

Shares in deferred compensation trust - 381,397 and 383,532 shares at a weighted average cost of $31.17 and $30.59 per share		(12)	(12)
Shares in deferred compensation trust - 395,224 and 383,532 shares at a weighted average cost of $32.23 and $30.59 per share				Shares in deferred compensation trust - 395,224 and 383,532 shares at a weighted average cost of $32.23 and $30.59 per share	(13)	(12)
Total Alliant Energy Corporation common equity	Total Alliant Energy Corporation common equity	6,077	5,990	Total Alliant Energy Corporation common equity	6,265	5,990

Total liabilities and equity	Total liabilities and equity	$18,839	$18,553	Total liabilities and equity	$20,205	$18,553

Refer to accompanying Combined Notes to Condensed Consolidated Financial Statements.


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ALLIANT ENERGY CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)


		For the Three Months			For the Nine Months
		Ended March 31,			Ended September 30,
		2022	2021		2022	2021
		(in millions)			(in millions)
Cash flows from operating activities:	Cash flows from operating activities:			Cash flows from operating activities:
Net income	Net income	$192	$174	Net income	$579	$579
Adjustments to reconcile net income to net cash flows from operating activities:	Adjustments to reconcile net income to net cash flows from operating activities:			Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	Depreciation and amortization	166	164	Depreciation and amortization	501	494
Deferred tax expense (benefit) and tax credits	Deferred tax expense (benefit) and tax credits	18	(29)	Deferred tax expense (benefit) and tax credits	8	(69)

Other	Other	(6)	4	Other	(8)	7
Other changes in assets and liabilities:	Other changes in assets and liabilities:			Other changes in assets and liabilities:
Accounts receivable	Accounts receivable	(161)	(126)	Accounts receivable	(425)	(397)
Gas stored underground		55	20

Derivative assets	Derivative assets	(85)	6	Derivative assets	(184)	(202)
Regulatory assets	Regulatory assets	19	(4)	Regulatory assets	(102)	(21)
Accounts payable	Accounts payable	(37)	(6)	Accounts payable	90	—
Derivative liabilities				Derivative liabilities	89	(21)
Regulatory liabilities	Regulatory liabilities	92	(60)	Regulatory liabilities	89	25
Deferred income taxes	Deferred income taxes	15	58	Deferred income taxes	(15)	160

Pension and other benefit obligations				Pension and other benefit obligations	(25)	(59)
Other	Other	(17)	(56)	Other	(112)	(19)
Net cash flows from operating activities	Net cash flows from operating activities	251	145	Net cash flows from operating activities	485	477
Cash flows used for investing activities:	Cash flows used for investing activities:			Cash flows used for investing activities:
Construction and acquisition expenditures:	Construction and acquisition expenditures:			Construction and acquisition expenditures:
Utility business	Utility business	(307)	(214)	Utility business	(873)	(772)
Other	Other	(23)	(17)	Other	(69)	(60)
Cash receipts on sold receivables	Cash receipts on sold receivables	115	209	Cash receipts on sold receivables	358	423
Other	Other	(8)	(16)	Other	(15)	(43)
Net cash flows used for investing activities	Net cash flows used for investing activities	(223)	(38)	Net cash flows used for investing activities	(599)	(452)
Cash flows from (used for) financing activities:	Cash flows from (used for) financing activities:			Cash flows from (used for) financing activities:
Common stock dividends	Common stock dividends	(107)	(102)	Common stock dividends	(322)	(304)

Proceeds from issuance of long-term debt	Proceeds from issuance of long-term debt	650	—	Proceeds from issuance of long-term debt	1,238	300
Payments to retire long-term debt	Payments to retire long-term debt	(300)	—	Payments to retire long-term debt	(379)	(4)
Net change in commercial paper	Net change in commercial paper	(239)	(53)	Net change in commercial paper	(132)	(73)
Contributions from noncontrolling interest				Contributions from noncontrolling interest	29	—
Distributions to noncontrolling interest				Distributions to noncontrolling interest	(29)	—
Other	Other	(1)	10	Other	16	24
Net cash flows from (used for) financing activities	Net cash flows from (used for) financing activities	3	(145)	Net cash flows from (used for) financing activities	421	(57)
Net increase (decrease) in cash, cash equivalents and restricted cash	Net increase (decrease) in cash, cash equivalents and restricted cash	31	(38)	Net increase (decrease) in cash, cash equivalents and restricted cash	307	(32)
Cash, cash equivalents and restricted cash at beginning of period	Cash, cash equivalents and restricted cash at beginning of period	40	56	Cash, cash equivalents and restricted cash at beginning of period	40	56
Cash, cash equivalents and restricted cash at end of period	Cash, cash equivalents and restricted cash at end of period	$71	$18	Cash, cash equivalents and restricted cash at end of period	$347	$24
Supplemental cash flows information:	Supplemental cash flows information:			Supplemental cash flows information:
Cash paid during the period for:	Cash paid during the period for:			Cash paid during the period for:
Interest	Interest	($62)	($59)	Interest	($220)	($197)

Income taxes, net				Income taxes, net	($7)	($1)
Significant non-cash investing and financing activities:	Significant non-cash investing and financing activities:			Significant non-cash investing and financing activities:
Accrued capital expenditures	Accrued capital expenditures	$134	$64	Accrued capital expenditures	$403	$91
Beneficial interest obtained in exchange for securitized accounts receivable	Beneficial interest obtained in exchange for securitized accounts receivable	$227	$107	Beneficial interest obtained in exchange for securitized accounts receivable	$248	$164

Refer to accompanying Combined Notes to Condensed Consolidated Financial Statements.


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Table of Contents

INTERSTATE POWER AND LIGHT COMPANY

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)


		For the Three Months			For the Three Months			For the Nine Months
		Ended March 31,			Ended September 30,			Ended September 30,
		2022	2021				2022	2021	2022	2021
		(in millions)		(in millions)
Revenues:	Revenues:					Revenues:
Electric utility	Electric utility	$400	$386			Electric utility	$596	$555	$1,438	$1,343
Gas utility	Gas utility	139	91			Gas utility	33	31	224	165
Steam and other	Steam and other	11	12			Steam and other	11	13	34	35
Total revenues	Total revenues	550	489			Total revenues	640	599	1,696	1,543
Operating expenses:	Operating expenses:					Operating expenses:
Electric production fuel and purchased power	Electric production fuel and purchased power	67	59			Electric production fuel and purchased power	140	101	290	215
Electric transmission service	Electric transmission service	97	92			Electric transmission service	115	103	303	274
Cost of gas sold	Cost of gas sold	85	50			Cost of gas sold	14	12	126	84
Other operation and maintenance	Other operation and maintenance	83	77			Other operation and maintenance	90	95	260	253
Depreciation and amortization	Depreciation and amortization	94	94			Depreciation and amortization	95	94	285	281
Taxes other than income taxes	Taxes other than income taxes	14	14			Taxes other than income taxes	15	14	43	42
Total operating expenses	Total operating expenses	440	386			Total operating expenses	469	419	1,307	1,149
Operating income	Operating income	110	103			Operating income	171	180	389	394
Other (income) and deductions:	Other (income) and deductions:					Other (income) and deductions:
Interest expense	Interest expense	37	35			Interest expense	37	34	111	103
Allowance for funds used during construction	Allowance for funds used during construction	(3)	(2)			Allowance for funds used during construction	(3)	(2)	(8)	(7)

Other						Other	(1)	—	(2)	2
Total other (income) and deductions	Total other (income) and deductions	34	33			Total other (income) and deductions	33	32	101	98
Income before income taxes	Income before income taxes	76	70			Income before income taxes	138	148	288	296
Income tax benefit	Income tax benefit	(11)	(12)			Income tax benefit	(16)	(12)	(39)	(34)
Net income	Net income	87	82			Net income	154	160	327	330
Preferred dividend requirements	Preferred dividend requirements	—	3			Preferred dividend requirements	—	3	—	8
Net income available for common stock	Net income available for common stock	$87	$79			Net income available for common stock	$154	$157	$327	$322

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.

Refer to accompanying Combined Notes to Condensed Consolidated Financial Statements.


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Table of Contents

INTERSTATE POWER AND LIGHT COMPANY

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)


		March 31, 2022	December 31, 2021		September 30, 2022	December 31, 2021
		(in millions, except per share and share amounts)			(in millions, except per share and share amounts)
ASSETS	ASSETS			ASSETS
Current assets:	Current assets:			Current assets:
Cash and cash equivalents	Cash and cash equivalents	$62	$34	Cash and cash equivalents	$45	$34
Accounts receivable, less allowance for expected credit losses	Accounts receivable, less allowance for expected credit losses	257	241	Accounts receivable, less allowance for expected credit losses	286	241
Income tax refunds receivable	Income tax refunds receivable	25	8	Income tax refunds receivable	1	8
Production fuel, at weighted average cost	Production fuel, at weighted average cost	28	29	Production fuel, at weighted average cost	31	29
Gas stored underground, at weighted average cost	Gas stored underground, at weighted average cost	11	40	Gas stored underground, at weighted average cost	66	40
Materials and supplies, at weighted average cost	Materials and supplies, at weighted average cost	71	70	Materials and supplies, at weighted average cost	77	70
Regulatory assets	Regulatory assets	60	73	Regulatory assets	108	73
Other	Other	85	69	Other	134	69
Total current assets	Total current assets	599	564	Total current assets	748	564
Property, plant and equipment, net	Property, plant and equipment, net	7,976	7,983	Property, plant and equipment, net	8,013	7,983
Other assets:	Other assets:			Other assets:
Regulatory assets	Regulatory assets	1,372	1,370	Regulatory assets	1,315	1,370
Deferred charges and other	Deferred charges and other	103	79	Deferred charges and other	132	79
Total other assets	Total other assets	1,475	1,449	Total other assets	1,447	1,449
Total assets	Total assets	$10,050	$9,996	Total assets	$10,208	$9,996


LIABILITIES AND EQUITY	LIABILITIES AND EQUITY			LIABILITIES AND EQUITY
Current liabilities:	Current liabilities:			Current liabilities:

Accounts payable	Accounts payable	$135	$173	Accounts payable	$232	$173
Accounts payable to associated companies	Accounts payable to associated companies	46	39	Accounts payable to associated companies	37	39
Regulatory liabilities	Regulatory liabilities	122	84	Regulatory liabilities	105	84
Accrued taxes	Accrued taxes	57	56	Accrued taxes	69	56
Accrued interest	Accrued interest	35	36	Accrued interest	35	36
Other	Other	62	67	Other	112	67
Total current liabilities	Total current liabilities	457	455	Total current liabilities	590	455
Long-term debt, net	Long-term debt, net	3,644	3,643	Long-term debt, net	3,645	3,643
Other liabilities:	Other liabilities:			Other liabilities:
Deferred tax liabilities	Deferred tax liabilities	1,107	1,083	Deferred tax liabilities	1,029	1,083
Regulatory liabilities	Regulatory liabilities	632	607	Regulatory liabilities	656	607
Pension and other benefit obligations	Pension and other benefit obligations	124	127	Pension and other benefit obligations	118	127
Other	Other	311	312	Other	314	312
Total other liabilities	Total other liabilities	2,174	2,129	Total other liabilities	2,117	2,129
Commitments and contingencies (Note 12)		0	0
Commitments and contingencies (Note 1 3)				Commitments and contingencies (Note 1 3)
Equity:	Equity:			Equity:
Interstate Power and Light Company common equity:	Interstate Power and Light Company common equity:			Interstate Power and Light Company common equity:
Common stock - $2.50 par value - 24,000,000 shares authorized; 13,370,788 shares outstanding	Common stock - $2.50 par value - 24,000,000 shares authorized; 13,370,788 shares outstanding	33	33	Common stock - $2.50 par value - 24,000,000 shares authorized; 13,370,788 shares outstanding	33	33
Additional paid-in capital	Additional paid-in capital	2,807	2,807	Additional paid-in capital	2,807	2,807
Retained earnings	Retained earnings	935	929	Retained earnings	1,016	929
Total Interstate Power and Light Company common equity	Total Interstate Power and Light Company common equity	3,775	3,769	Total Interstate Power and Light Company common equity	3,856	3,769

Total liabilities and equity	Total liabilities and equity	$10,050	$9,996	Total liabilities and equity	$10,208	$9,996

Refer to accompanying Combined Notes to Condensed Consolidated Financial Statements.


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Table of Contents

INTERSTATE POWER AND LIGHT COMPANY

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)


		For the Three Months			For the Nine Months
		Ended March 31,			Ended September 30,
		2022	2021		2022	2021
		(in millions)			(in millions)
Cash flows from (used for) operating activities:
Cash flows from operating activities:				Cash flows from operating activities:
Net income	Net income	$87	$82	Net income	$327	$330
Adjustments to reconcile net income to net cash flows from (used for) operating activities:
Adjustments to reconcile net income to net cash flows from operating activities:				Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	Depreciation and amortization	94	94	Depreciation and amortization	285	281

Deferred tax expense (benefit) and tax credits		15	(2)
Deferred tax benefit and tax credits				Deferred tax benefit and tax credits	(24)	(13)
Other	Other	(2)	(1)	Other	(8)	(1)
Other changes in assets and liabilities:	Other changes in assets and liabilities:			Other changes in assets and liabilities:
Accounts receivable	Accounts receivable	(128)	(133)	Accounts receivable	(397)	(412)
Income tax refunds receivable		(17)	(3)
Gas stored underground		29	12

Derivative assets	Derivative assets	(43)	10	Derivative assets	(118)	(86)
Regulatory assets	Regulatory assets	9	(16)	Regulatory assets	18	(33)

Accounts payable				Accounts payable	71	5
Derivative liabilities				Derivative liabilities	62	(9)
Regulatory liabilities	Regulatory liabilities	59	(19)	Regulatory liabilities	61	30

Deferred income taxes				Deferred income taxes	(30)	56
Pension and other benefit obligations				Pension and other benefit obligations	(9)	(25)
Other	Other	(14)	(69)	Other	(72)	(28)
Net cash flows from (used for) operating activities		89	(45)
Net cash flows from operating activities				Net cash flows from operating activities	166	95
Cash flows from investing activities:	Cash flows from investing activities:			Cash flows from investing activities:
Construction and acquisition expenditures	Construction and acquisition expenditures	(96)	(106)	Construction and acquisition expenditures	(269)	(285)
Cash receipts on sold receivables	Cash receipts on sold receivables	115	209	Cash receipts on sold receivables	358	423
Other	Other	(1)	(5)	Other	(5)	(16)
Net cash flows from investing activities	Net cash flows from investing activities	18	98	Net cash flows from investing activities	84	122
Cash flows used for financing activities:	Cash flows used for financing activities:			Cash flows used for financing activities:
Common stock dividends	Common stock dividends	(81)	(101)	Common stock dividends	(240)	(301)

Capital contributions from parent				Capital contributions from parent	—	50

Other	Other	2	9	Other	1	(3)
Net cash flows used for financing activities	Net cash flows used for financing activities	(79)	(92)	Net cash flows used for financing activities	(239)	(254)
Net increase (decrease) in cash, cash equivalents and restricted cash	Net increase (decrease) in cash, cash equivalents and restricted cash	28	(39)	Net increase (decrease) in cash, cash equivalents and restricted cash	11	(37)
Cash, cash equivalents and restricted cash at beginning of period	Cash, cash equivalents and restricted cash at beginning of period	34	50	Cash, cash equivalents and restricted cash at beginning of period	34	50
Cash, cash equivalents and restricted cash at end of period	Cash, cash equivalents and restricted cash at end of period	$62	$11	Cash, cash equivalents and restricted cash at end of period	$45	$13
Supplemental cash flows information:	Supplemental cash flows information:			Supplemental cash flows information:
Cash (paid) refunded during the period for:	Cash (paid) refunded during the period for:			Cash (paid) refunded during the period for:
Interest	Interest	($37)	($37)	Interest	($111)	($106)
Income taxes, net	Income taxes, net	$—	$7	Income taxes, net	$33	$28
Significant non-cash investing and financing activities:	Significant non-cash investing and financing activities:			Significant non-cash investing and financing activities:
Accrued capital expenditures	Accrued capital expenditures	$27	$31	Accrued capital expenditures	$43	$30
Beneficial interest obtained in exchange for securitized accounts receivable	Beneficial interest obtained in exchange for securitized accounts receivable	$227	$107	Beneficial interest obtained in exchange for securitized accounts receivable	$248	$164

Refer to accompanying Combined Notes to Condensed Consolidated Financial Statements.


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Table of Contents

WISCONSIN POWER AND LIGHT COMPANY

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)


		For the Three Months			For the Three Months			For the Nine Months
		Ended March 31,			Ended September 30,			Ended September 30,
		2022	2021				2022	2021	2022	2021
		(in millions)		(in millions)
Revenues:	Revenues:					Revenues:
Electric utility	Electric utility	$373	$315			Electric utility	$443	$384	$1,186	$1,014
Gas utility	Gas utility	123	79			Gas utility	29	19	194	124
Other	Other	—	1			Other	—	—	1	1
Total revenues	Total revenues	496	395			Total revenues	472	403	1,381	1,139
Operating expenses:	Operating expenses:					Operating expenses:
Electric production fuel and purchased power	Electric production fuel and purchased power	101	74			Electric production fuel and purchased power	134	105	343	263
Electric transmission service	Electric transmission service	41	42			Electric transmission service	42	44	125	128
Cost of gas sold	Cost of gas sold	83	50			Cost of gas sold	13	6	117	65
Other operation and maintenance	Other operation and maintenance	58	59			Other operation and maintenance	70	66	193	194
Depreciation and amortization	Depreciation and amortization	70	69			Depreciation and amortization	71	70	211	209
Taxes other than income taxes	Taxes other than income taxes	12	11			Taxes other than income taxes	11	12	35	35
Total operating expenses	Total operating expenses	365	305			Total operating expenses	341	303	1,024	894
Operating income	Operating income	131	90			Operating income	131	100	357	245
Other (income) and deductions:	Other (income) and deductions:					Other (income) and deductions:
Interest expense	Interest expense	27	26			Interest expense	31	25	86	77

Allowance for funds used during construction	Allowance for funds used during construction	(9)	(2)			Allowance for funds used during construction	(7)	(5)	(26)	(9)
Other	Other	—	1			Other	—	2	—	3
Total other (income) and deductions	Total other (income) and deductions	18	25			Total other (income) and deductions	24	22	60	71
Income before income taxes	Income before income taxes	113	65			Income before income taxes	107	78	297	174
Income tax expense (benefit)	Income tax expense (benefit)	21	(19)			Income tax expense (benefit)	16	(15)	50	(41)
Net income	Net income	$92	$84			Net income	$91	$93	$247	$215

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.

Refer to accompanying Combined Notes to Condensed Consolidated Financial Statements.


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Table of Contents

WISCONSIN POWER AND LIGHT COMPANY

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)

March 31,
2022 December 31,
2021
(in millions, except per
share and share amounts)
ASSETS
Current assets:
Cash and cash equivalents $4 $2
Accounts receivable, less allowance for expected credit losses 211 188
Production fuel, at weighted average cost 11 23
Gas stored underground, at weighted average cost 16 42
Materials and supplies, at weighted average cost 45 41
Regulatory assets 28 31
Prepaid gross receipts tax 30 40
Other 102 86
Total current assets 447 453
Property, plant and equipment, net 6,747 6,538
Other assets:
Regulatory assets 459 466
Deferred charges and other 90 61
Total other assets 549 527
Total assets $7,743 $7,518
LIABILITIES AND EQUITY
Current liabilities:
Current maturities of long-term debt $250 $250
Commercial paper 157 236
Accounts payable 185 190
Accounts payable to associated companies 34 39
Regulatory liabilities 129 102
Other 102 73
Total current liabilities 857 890
Long-term debt, net (excluding current portion) 2,180 2,179
Other liabilities:
Deferred tax liabilities 759 753
Regulatory liabilities 489 478
Pension and other benefit obligations 154 159
Other 253 236
Total other liabilities 1,655 1,626
Commitments and contingencies (Note 12)
0 0
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 1,884 1,704
Retained earnings 1,101 1,053
Total Wisconsin Power and Light Company common equity 3,051 2,823
Total liabilities and equity $7,743 $7,518


	September 30, 2022	December 31, 2021
	(in millions, except per share and share amounts)
ASSETS
Current assets:
Cash and cash equivalents	$299	$2
Accounts receivable, less allowance for expected credit losses	211	188
Production fuel, at weighted average cost	18	23
Gas stored underground, at weighted average cost	58	42
Materials and supplies, at weighted average cost	47	41
Regulatory assets	69	31
Prepaid gross receipts tax	31	40
Other	130	86
Total current assets	863	453
Property, plant and equipment, net	7,371	6,538
Other assets:
Regulatory assets	549	466
Deferred charges and other	115	61
Total other assets	664	527
Total assets	$8,898	$7,518


LIABILITIES AND EQUITY
Current liabilities:
Current maturities of long-term debt	$250	$250
Commercial paper	—	236

Accounts payable	470	190
Accounts payable to associated companies	51	39
Regulatory liabilities	124	102
Other	93	73
Total current liabilities	988	890
Long-term debt, net (excluding current portion)	2,769	2,179
Other liabilities:
Deferred tax liabilities	783	753
Regulatory liabilities	502	478

Pension and other benefit obligations	148	159
Other	352	236
Total other liabilities	1,785	1,626
Commitments and contingencies (Note 1 3)
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	2,123	1,704
Retained earnings	1,167	1,053
Total Wisconsin Power and Light Company common equity	3,356	2,823


Total liabilities and equity	$8,898	$7,518

Refer to accompanying Combined Notes to Condensed Consolidated Financial Statements.


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Table of Contents

WISCONSIN POWER AND LIGHT COMPANY

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)


		For the Three Months			For the Nine Months
		Ended March 31,			Ended September 30,
		2022	2021		2022	2021
		(in millions)			(in millions)
Cash flows from operating activities:	Cash flows from operating activities:			Cash flows from operating activities:
Net income	Net income	$92	$84	Net income	$247	$215
Adjustments to reconcile net income to net cash flows from operating activities:	Adjustments to reconcile net income to net cash flows from operating activities:			Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	Depreciation and amortization	70	69	Depreciation and amortization	211	209
Deferred tax benefit and tax credits		(2)	(28)
Deferred tax expense (benefit) and tax credits				Deferred tax expense (benefit) and tax credits	11	(63)
Other	Other	(3)	4	Other	(7)	12
Other changes in assets and liabilities:	Other changes in assets and liabilities:			Other changes in assets and liabilities:
Accounts receivable		(23)	9
Gas stored underground		26	9

Derivative assets	Derivative assets	(42)	(4)	Derivative assets	(66)	(116)
Regulatory assets				Regulatory assets	(120)	11

Accounts payable		(24)	(24)
Regulatory liabilities		32	(41)
Accrued taxes		21	8

Deferred income taxes	Deferred income taxes	8	44	Deferred income taxes	20	108
Other	Other	12	18	Other	(17)	(27)
Net cash flows from operating activities	Net cash flows from operating activities	167	148	Net cash flows from operating activities	279	349
Cash flows used for investing activities:	Cash flows used for investing activities:			Cash flows used for investing activities:
Construction and acquisition expenditures	Construction and acquisition expenditures	(212)	(108)	Construction and acquisition expenditures	(604)	(487)
Other	Other	(5)	(11)	Other	(8)	(23)
Net cash flows used for investing activities	Net cash flows used for investing activities	(217)	(119)	Net cash flows used for investing activities	(612)	(510)
Cash flows from (used for) financing activities:
Cash flows from financing activities:				Cash flows from financing activities:
Common stock dividends	Common stock dividends	(44)	(42)	Common stock dividends	(133)	(126)
Capital contributions from parent	Capital contributions from parent	180	125	Capital contributions from parent	420	245

Proceeds from issuance of long-term debt				Proceeds from issuance of long-term debt	588	300

Net change in commercial paper	Net change in commercial paper	(79)	(109)	Net change in commercial paper	(236)	(254)
Contributions from noncontrolling interest				Contributions from noncontrolling interest	29	—
Distributions to noncontrolling interest				Distributions to noncontrolling interest	(29)	—
Other	Other	(5)	(4)	Other	(9)	(3)
Net cash flows from (used for) financing activities		52	(30)
Net increase (decrease) in cash, cash equivalents and restricted cash		2	(1)
Net cash flows from financing activities				Net cash flows from financing activities	630	162
Net increase in cash, cash equivalents and restricted cash				Net increase in cash, cash equivalents and restricted cash	297	1
Cash, cash equivalents and restricted cash at beginning of period	Cash, cash equivalents and restricted cash at beginning of period	2	3	Cash, cash equivalents and restricted cash at beginning of period	2	3
Cash, cash equivalents and restricted cash at end of period	Cash, cash equivalents and restricted cash at end of period	$4	$2	Cash, cash equivalents and restricted cash at end of period	$299	$4
Supplemental cash flows information:	Supplemental cash flows information:			Supplemental cash flows information:
Cash paid during the period for:	Cash paid during the period for:			Cash paid during the period for:
Interest	Interest	($23)	($21)	Interest	($78)	($72)

Income taxes, net				Income taxes, net	($51)	($24)
Significant non-cash investing and financing activities:	Significant non-cash investing and financing activities:			Significant non-cash investing and financing activities:
Accrued capital expenditures	Accrued capital expenditures	$104	$32	Accrued capital expenditures	$355	$59

Refer to accompanying Combined Notes to Condensed Consolidated Financial Statements.


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Table of Contents

ALLIANT ENERGY CORPORATION

INTERSTATE POWER AND LIGHT COMPANY

WISCONSIN POWER AND LIGHT COMPANY

COMBINED NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

NOTE 1(a) General - The interim unaudited Financial Statements included herein have been prepared pursuant to the rules and regulations of the SEC. Accordingly, certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted, although management believes that the disclosures are adequate to make the information presented not misleading. These Financial Statements should be read in conjunction with the financial statements and the notes thereto included in the 2021 Form 10-K.

In the opinion of management, all adjustments, which unless otherwise noted are normal and recurring in nature, necessary for a fair presentation of the results of operations, financial position and cash flows have been made. Results for the ~~three~~nine months ended ~~March 31,~~September 30, 2022 are not necessarily indicative of results that may be expected for the year ending December 31, 2022.

A change in management’s estimates or assumptions could have a material impact on financial condition and results of operations during the period in which such change occurred. Certain prior period amounts in the Financial Statements and Notes have been reclassified to conform to the current period presentation for comparative purposes.

NOTE 1(b) Cash and Cash Equivalents ~~and Restricted Cash~~ - At ~~March 31,~~September 30, 2022, Alliant Energy’s, IPL’s and ~~IPL’s~~WPL’s cash and cash equivalents included ~~$59~~$334 million, $39 million and $295 million of money market fund investments, respectively, with anweighted average interest ~~rate~~rates of ~~0.3%~~3%.

NOTE 1(c) Variable Interest Entities (VIEs) - In 2022, WPL 2022 Solar Holdco, LLC was formed as a joint venture to own and operate project companies responsible for the construction, ownership and operation of various solar generation assets. Members of the joint venture were a WPL subsidiary (the managing member) and a tax equity partner. In the second quarter of 2022, the WPL subsidiary and the tax equity partner contributed $62 million and $29 million, respectively, to WPL 2022 Solar Holdco, LLC in exchange for membership interests, and $88 million of the contributed funds were paid to WPL in exchange for equity interests in the project companies. In the second quarter of 2022, Alliant Energy and WPL consolidated this joint venture as it was a VIE in which WPL held a variable interest, and WPL controlled decisions that were significant to the joint venture’s ongoing operations and economic results (i.e., WPL was the primary beneficiary).

In August 2022, the Inflation Reduction Act of 2022 was enacted. Following its enactment, WPL evaluated the provisions of the new legislation and determined that retaining full ownership of the solar projects is expected to result in lower costs for its customers. As a result, in the third quarter of 2022, WPL and the tax equity partner terminated the tax equity partnership, and WPL returned the $29 million of initial funding to the tax equity partner. Alliant Energy and WPL no longer expect their solar generation project construction costs to be financed with capital from tax equity partners, which would result in higher rate base amounts compared to those previously approved by the PSCW for WPL’s planned approximately 1,100 MW of solar generation. Alliant Energy and WPL concluded that no disallowance of anticipated higher rate base amounts was required as of September 30, 2022 given full ownership of WPL's planned solar generation is expected to result in lower costs for WPL's customers.

Refer to Note 6 for discussion of a noncontrolling interest that was initially associated with the joint venture prior to the termination of the tax equity partnership.


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Table of Contents

NOTE 2. REGULATORY MATTERS

Regulatory Assets and Regulatory Liabilities -

Regulatory assets were comprised of the following items (in millions):


		Alliant Energy		IPL		WPL			Alliant Energy		IPL		WPL
		March 31, 2022	December 31, 2021	March 31, 2022	December 31, 2021	March 31, 2022	December 31, 2021		September 30, 2022	December 31, 2021	September 30, 2022	December 31, 2021	September 30, 2022	December 31, 2021
Tax-related	Tax-related	$949	$934	$896	$884	$53	$50	Tax-related	$913	$934	$842	$884	$71	$50
Pension and OPEB costs	Pension and OPEB costs	453	462	224	228	229	234	Pension and OPEB costs	436	462	216	228	220	234
Asset retirement obligations	Asset retirement obligations	134	128	94	89	40	39	Asset retirement obligations	145	128	104	89	41	39
Commodity cost recovery								Commodity cost recovery	129	42	2	2	127	40
Derivatives								Derivatives	102	8	67	4	35	4
Assets retired early	Assets retired early	88	92	64	66	24	26	Assets retired early	75	92	56	66	19	26
IPL’s DAEC PPA amendment	IPL’s DAEC PPA amendment	84	90	84	90	—	—	IPL’s DAEC PPA amendment	72	90	72	90	—	—
WPL’s Western Wisconsin gas distribution expansion investments	WPL’s Western Wisconsin gas distribution expansion investments	50	52	—	—	50	52	WPL’s Western Wisconsin gas distribution expansion investments	49	52	—	—	49	52
Commodity cost recovery		42	42	2	2	40	40

Other	Other	119	140	68	84	51	56	Other	120	132	64	80	56	52
		$1,919	$1,940	$1,432	$1,443	$487	$497		$2,041	$1,940	$1,423	$1,443	$618	$497

Tax-related - Refer to N ote 9 for discussion of Iowa Tax Reform, which resulted in a decrease in Alliant Energy’s and IPL’s tax-related regulatory assets in the third quarter of 2022.

Commodity cost recovery - The cost recovery mechanism for WPL’s retail electric customers is based on forecasts of certain fuel-related costs expected to be incurred during forward-looking test periods and fuel monitoring ranges determined by the PSCW during each retail electric rate proceeding or in a separate fuel cost plan approval proceeding. During the nine months ended September 30, 2022, WPL’s actual fuel-related costs fell outside these fuel monitoring ranges, resulting in a $83 million deferral of higher than expected fuel-related costs as of September 30, 2022.

Derivatives - Refer to Note 11 for discussion of changes in Alliant Energy’s, IPL’s and WPL’s derivative liabilities/assets during the nine months ended September 30, 2022, which result in comparable changes to regulatory assets/liabilities on the balance sheets.

Regulatory liabilities were comprised of the following items (in millions):


		Alliant Energy		IPL		WPL			Alliant Energy		IPL		WPL
		March 31, 2022	December 31, 2021	March 31, 2022	December 31, 2021	March 31, 2022	December 31, 2021		September 30, 2022	December 31, 2021	September 30, 2022	December 31, 2021	September 30, 2022	December 31, 2021
Tax-related	Tax-related	$578	$585	$310	$312	$268	$273	Tax-related	$582	$585	$304	$312	$278	$273
Cost of removal obligations	Cost of removal obligations	391	384	256	252	135	132	Cost of removal obligations	398	384	258	252	140	132
Derivatives	Derivatives	258	166	125	77	133	89	Derivatives	312	166	164	77	148	89
WPL’s West Riverside liquidated damages								WPL’s West Riverside liquidated damages	33	36	—	—	33	36
Electric transmission cost recovery	Electric transmission cost recovery	50	51	29	27	21	24	Electric transmission cost recovery	16	51	4	27	12	24
WPL’s West Riverside liquidated damages		35	36	—	—	35	36

Other	Other	60	49	34	23	26	26	Other	46	49	31	23	15	26
		$1,372	$1,271	$754	$691	$618	$580		$1,387	$1,271	$761	$691	$626	$580


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NOTE 3. PROPERTY, PLANT AND EQUIPMENT

In June 2022, WPL announced revised expected timing for the retirements of its remaining coal-fired EGUs in order to help manage regional capacity and changing generation requirements across the MISO region. WPL currently expects to retire the Edgewater Generating Station (414 MW) by June 1, 2025, and Columbia Units 1 and 2 by June 1, 2026 (595 MW in aggregate). In addition, IPL currently expects to retire the coal-fired Lansing Generating Station (275 MW) in the first half of 2023. Alliant Energy, IPL and WPL are working with MISO, state regulatory commissions and other regulatory agencies, as required, to determine the timing of these actions, which are subject to change depending on operational, regulatory, market and other factors.

NOTE 4. RECEIVABLES

Sales of Accounts Receivable - IPL maintains a Receivables Purchase and Sale Agreement (Receivables Agreement) whereby it may sell its customer accounts receivables, unbilled revenues and certain other accounts receivables to a third party through wholly-owned and consolidated special purpose entities. The transfers of receivables meet the criteria for sale accounting established by the transfer of financial assets accounting rules. As of ~~March 31,~~September 30, 2022, IPL had $109 million of available capacity under its sales of accounts receivable program. IPL’s maximum and average outstanding cash proceeds (based on daily outstanding balances) related to the sales of accounts receivable program for the three and nine months ended ~~March 31~~September 30 were as follows (in millions):

2022 2021
Maximum outstanding aggregate cash proceeds $36 $100
Average outstanding aggregate cash proceeds 4 30


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	Three Months		Nine Months
	2022	2021	2022	2021
Maximum outstanding aggregate cash proceeds	$36	$110	$66	$110
Average outstanding aggregate cash proceeds	3	65	8	52

The attributes of IPL’s receivables sold under the Receivables Agreement were as follows (in millions):


		March 31, 2022	December 31, 2021		September 30, 2022	December 31, 2021
Customer accounts receivable	Customer accounts receivable	$142	$125	Customer accounts receivable	$169	$125
Unbilled utility revenues	Unbilled utility revenues	96	104	Unbilled utility revenues	92	104

Receivables sold to third party	Receivables sold to third party	238	229	Receivables sold to third party	261	229
Less: cash proceeds	Less: cash proceeds	1	1	Less: cash proceeds	1	1
Deferred proceeds	Deferred proceeds	237	228	Deferred proceeds	260	228
Less: allowance for expected credit losses	Less: allowance for expected credit losses	10	14	Less: allowance for expected credit losses	12	14
Fair value of deferred proceeds	Fair value of deferred proceeds	$227	$214	Fair value of deferred proceeds	$248	$214

As of ~~March 31,~~September 30, 2022, outstanding receivables past due under the Receivables Agreement were ~~$24~~$20 million. Additional attributes of IPL’s receivables sold under the Receivables Agreement for the three and nine months ended ~~March 31~~September 30 were as follows (in millions):


				Three Months		Nine Months
		2022	2021			2022	2021	2022	2021
Collections	Collections	$561	$529		Collections	$670	$607	$1,731	$1,589
Write-offs, net of recoveries	Write-offs, net of recoveries	2	2		Write-offs, net of recoveries	3	4	6	7

NOTE 4.5. INVESTMENTS

Unconsolidated Equity Investments - Alliant Energy’s equity (income) loss from unconsolidated investments accounted for under the equity method of accounting for the three and nine months ended ~~March 31~~September 30 was as follows (in millions):


				Three Months		Nine Months
		2022	2021			2022	2021	2022	2021
ATC Holdings	ATC Holdings	($11)	($11)		ATC Holdings	($7)	($12)	($29)	($34)

Other	Other	(4)	(4)		Other	2	(1)	(8)	(13)
		($15)	($15)			($5)	($13)	($37)	($47)

Refer to N ote 13(e ) for discussion of a reduction in earnings recorded in the third quarter of 2022 related to a court decision, which is currently expected to reduce the base return on equity authorized for MISO transmission owners, including ATC.

NOTE 5.6. COMMON EQUITY

Common Share Activity - A summary of Alliant Energy’s common stock activity was as follows:


Shares outstanding, January 1, 2022			250,474,529


Shareowner Direct Plan			~~116,431~~324,533
Equity-based compensation plans			222,768

Shares outstanding, ~~March 31,~~September 30, 2022			~~250,813,728~~251,021,830

Noncontrolling Interest - In the second quarter of 2022, WPL and the tax equity partner contributed to a joint venture associated with certain WPL solar generation projects. The tax equity partner's contributions were represented as a noncontrolling interest within total equity on Alliant Energy’s and WPL’s balance sheets as of June 30, 2022. In the third quarter of 2022, WPL and the tax equity partner terminated the tax equity partnership and WPL returned the tax equity partner’s initial contributions, resulting in the reversal of the noncontrolling interest within total equity on Alliant Energy’s and WPL’s balance sheets as of September 30, 2022. Refer to Note 1(c ) for additional information.


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Changes in Shareowners’ Equity - A summary of changes in shareowners’ equity was as follows (in millions):


Alliant Energy	Alliant Energy	Total Alliant Energy Common Equity							Alliant Energy	Total Alliant Energy Common Equity
					Accumulated	Shares in	Cumulative						Accumulated	Shares in
			Additional		Other	Deferred	Preferred				Additional		Other	Deferred
		Common	Paid-In	Retained	Comprehensive	Compensation	Stock	Total		Common	Paid-In	Retained	Comprehensive	Compensation	Noncontrolling	Total
		Stock	Capital	Earnings	Loss	Trust	of IPL	Equity		Stock	Capital	Earnings	Loss	Trust	Interest	Equity
Three Months Ended March 31, 2022
Beginning balance, December 31, 2021		$3	$2,749	$3,250	$—	($12)	$—	$5,990
Three Months Ended September 30, 2022									Three Months Ended September 30, 2022
Beginning balance, June 30, 2022									Beginning balance, June 30, 2022	$3	$2,759	$3,387	$—	($12)	$29	$6,166
Net income attributable to Alliant Energy common shareowners	Net income attributable to Alliant Energy common shareowners			192				192	Net income attributable to Alliant Energy common shareowners			227				227
Common stock dividends ($0.4275 per share)	Common stock dividends ($0.4275 per share)			(107)				(107)	Common stock dividends ($0.4275 per share)			(106)				(106)
Shareowner Direct Plan issuances	Shareowner Direct Plan issuances		7					7	Shareowner Direct Plan issuances		6					6
Equity-based compensation plans and other	Equity-based compensation plans and other		(6)	1				(5)	Equity-based compensation plans and other		2			(1)		1

Ending balance, March 31, 2022		$3	$2,750	$3,336	$—	($12)	$—	$6,077
Three Months Ended March 31, 2021
Beginning balance, December 31, 2020		$2	$2,704	$2,994	($1)	($11)	$200	$5,888
Net income attributable to Alliant Energy common shareowners				171				171
Common stock dividends ($0.4025 per share)				(102)				(102)
Shareowner Direct Plan issuances		1	7					8
Equity-based compensation plans and other			1					1
Distributions to noncontrolling interest									Distributions to noncontrolling interest						(29)	(29)

Ending balance, March 31, 2021		$3	$2,712	$3,063	($1)	($11)	$200	$5,966
Ending balance, September 30, 2022									Ending balance, September 30, 2022	$3	$2,767	$3,508	$—	($13)	$—	$6,265


Alliant Energy	Total Alliant Energy Common Equity
				Accumulated	Shares in	Cumulative
		Additional		Other	Deferred	Preferred
	Common	Paid-In	Retained	Comprehensive	Compensation	Stock	Total
	Stock	Capital	Earnings	Loss	Trust	of IPL	Equity
Three Months Ended September 30, 2021
Beginning balance, June 30, 2021	$3	$2,722	$3,106	($1)	($11)	$200	$6,019
Net income attributable to Alliant Energy common shareowners			256				256
Common stock dividends ($0.4025 per share)			(101)				(101)
Shareowner Direct Plan issuances		6					6
Equity-based compensation plans and other		5					5




Ending balance, September 30, 2021	$3	$2,733	$3,261	($1)	($11)	$200	$6,185

IPL Total IPL Common Equity
Additional Cumulative
Common Paid-In Retained Preferred Total
Stock Capital Earnings Stock Equity
Three Months Ended March 31, 2022
Beginning balance, December 31, 2021 $33 $2,807 $929 $— $3,769
Net income available for common stock 87 87
Common stock dividends (81) (81)
Ending balance, March 31, 2022 $33 $2,807 $935 $— $3,775
Three Months Ended March 31, 2021
Beginning balance, December 31, 2020 $33 $2,752 $979 $200 $3,964
Net income available for common stock 79 79
Common stock dividends (101) (101)
Ending balance, March 31, 2021 $33 $2,752 $957 $200 $3,942



Alliant Energy	Total Alliant Energy Common Equity
				Accumulated	Shares in
		Additional		Other	Deferred
	Common	Paid-In	Retained	Comprehensive	Compensation	Noncontrolling	Total
	Stock	Capital	Earnings	Loss	Trust	Interest	Equity
Nine Months Ended September 30, 2022
Beginning balance, December 31, 2021	$3	$2,749	$3,250	$—	($12)	$—	$5,990
Net income attributable to Alliant Energy common shareowners			579				579
Common stock dividends ($1.2825 per share)			(322)				(322)
Shareowner Direct Plan issuances		19					19
Equity-based compensation plans and other		(1)	1		(1)		(1)
Contributions from noncontrolling interest						29	29
Distributions to noncontrolling interest						(29)	(29)


Ending balance, September 30, 2022	$3	$2,767	$3,508	$—	($13)	$—	$6,265

WPL Additional Total
Common Paid-In Retained Common
Stock Capital Earnings Equity
Three Months Ended March 31, 2022
Beginning balance, December 31, 2021 $66 $1,704 $1,053 $2,823
Net income 92 92
Common stock dividends (44) (44)
Capital contributions from parent 180 180
Ending balance, March 31, 2022 $66 $1,884 $1,101 $3,051
Three Months Ended March 31, 2021
Beginning balance, December 31, 2020 $66 $1,459 $953 $2,478
Net income 84 84
Common stock dividends (42) (42)
Capital contributions from parent 125 125
Ending balance, March 31, 2021 $66 $1,584 $995 $2,645



Alliant Energy	Total Alliant Energy Common Equity
				Accumulated	Shares in	Cumulative
		Additional		Other	Deferred	Preferred
	Common	Paid-In	Retained	Comprehensive	Compensation	Stock	Total
	Stock	Capital	Earnings	Loss	Trust	of IPL	Equity
Nine Months Ended September 30, 2021
Beginning balance, December 31, 2020	$2	$2,704	$2,994	($1)	($11)	$200	$5,888
Net income attributable to Alliant Energy common shareowners			571				571
Common stock dividends ($1.2075 per share)			(304)				(304)
Shareowner Direct Plan issuances	1	21					22
Equity-based compensation plans and other		8					8




Ending balance, September 30, 2021	$3	$2,733	$3,261	($1)	($11)	$200	$6,185


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IPL	Total IPL Common Equity
		Additional		Cumulative
	Common	Paid-In	Retained	Preferred	Total
	Stock	Capital	Earnings	Stock	Equity
Three Months Ended September 30, 2022
Beginning balance, June 30, 2022	$33	$2,807	$942	$—	$3,782
Net income available for common stock			154		154
Common stock dividends			(80)		(80)

Ending balance, September 30, 2022	$33	$2,807	$1,016	$—	$3,856
Three Months Ended September 30, 2021
Beginning balance, June 30, 2021	$33	$2,802	$944	$200	$3,979
Net income available for common stock			157		157
Common stock dividends			(101)		(101)

Ending balance, September 30, 2021	$33	$2,802	$1,000	$200	$4,035



IPL	Total IPL Common Equity
		Additional		Cumulative
	Common	Paid-In	Retained	Preferred	Total
	Stock	Capital	Earnings	Stock	Equity
Nine Months Ended September 30, 2022
Beginning balance, December 31, 2021	$33	$2,807	$929	$—	$3,769
Net income available for common stock			327		327
Common stock dividends			(240)		(240)

Ending balance, September 30, 2022	$33	$2,807	$1,016	$—	$3,856
Nine Months Ended September 30, 2021
Beginning balance, December 31, 2020	$33	$2,752	$979	$200	$3,964
Net income available for common stock			322		322
Common stock dividends			(301)		(301)
Capital contributions from parent		50			50
Ending balance, September 30, 2021	$33	$2,802	$1,000	$200	$4,035


WPL	Total WPL Common Equity
		Additional
	Common	Paid-In	Retained	Noncontrolling	Total
	Stock	Capital	Earnings	Interest	Equity
Three Months Ended September 30, 2022
Beginning balance, June 30, 2022	$66	$1,968	$1,120	$29	$3,183
Net income			91		91
Common stock dividends			(44)		(44)
Capital contributions from parent		155			155

Distributions to noncontrolling interest				(29)	(29)

Ending balance, September 30, 2022	$66	$2,123	$1,167	$—	$3,356
Three Months Ended September 30, 2021
Beginning balance, June 30, 2021	$66	$1,669	$990	$—	$2,725
Net income			93		93
Common stock dividends			(41)		(41)
Capital contributions from parent		35			35


Ending balance, September 30, 2021	$66	$1,704	$1,042	$—	$2,812


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WPL	Total WPL Common Equity
		Additional
	Common	Paid-In	Retained	Noncontrolling	Total
	Stock	Capital	Earnings	Interest	Equity
Nine Months Ended September 30, 2022
Beginning balance, December 31, 2021	$66	$1,704	$1,053	$—	$2,823
Net income			247		247
Common stock dividends			(133)		(133)
Capital contributions from parent		420			420
Contributions from noncontrolling interest				29	29
Distributions to noncontrolling interest				(29)	(29)
Other		(1)			(1)
Ending balance, September 30, 2022	$66	$2,123	$1,167	$—	$3,356
Nine Months Ended September 30, 2021
Beginning balance, December 31, 2020	$66	$1,459	$953	$—	$2,478
Net income			215		215
Common stock dividends			(126)		(126)
Capital contributions from parent		245			245


Ending balance, September 30, 2021	$66	$1,704	$1,042	$—	$2,812

NOTE 6.7. DEBT

NOTE ~~6(a)~~7(a) Short-term Debt - Information regarding Alliant Energy’s, IPL’s and WPL’s commercial paper classified as short-term debt was as follows (dollars in millions):


March 31, 2022		Alliant Energy	IPL	WPL
September 30, 2022					September 30, 2022	Alliant Energy	IPL	WPL
Amount outstanding	Amount outstanding	$276	$—	$157	Amount outstanding	$383	$—	$—
Weighted average interest rates	Weighted average interest rates	0.6%	N/A	0.5%	Weighted average interest rates	3.4%	N/A	N/A
Available credit facility capacity	Available credit facility capacity	$724	$250	$143	Available credit facility capacity	$617	$250	$300


		Alliant Energy		IPL		WPL			Alliant Energy		IPL		WPL
Three Months Ended March 31		2022	2021	2022	2021	2022	2021
Three Months Ended September 30								Three Months Ended September 30	2022	2021	2022	2021	2022	2021
Maximum amount outstanding (based on daily outstanding balances)	Maximum amount outstanding (based on daily outstanding balances)	$577	$578	$—	$—	$252	$275	Maximum amount outstanding (based on daily outstanding balances)	$449	$648	$—	$8	$251	$320
Average amount outstanding (based on daily outstanding balances)	Average amount outstanding (based on daily outstanding balances)	$443	$424	$—	$—	$205	$189	Average amount outstanding (based on daily outstanding balances)	$353	$560	$—	$—	$110	$221
Weighted average interest rates	Weighted average interest rates	0.3%	0.2%	—%	—%	0.3%	0.2%	Weighted average interest rates	2.4%	0.2%	—%	0.2%	2.0%	0.1%

Nine Months Ended September 30								Nine Months Ended September 30
Maximum amount outstanding (based on daily outstanding balances)								Maximum amount outstanding (based on daily outstanding balances)	$577	$648	$—	$19	$252	$320
Average amount outstanding (based on daily outstanding balances)								Average amount outstanding (based on daily outstanding balances)	$377	$479	$—	$—	$160	$196
Weighted average interest rates								Weighted average interest rates	1.2%	0.2%	—%	0.2%	0.9%	0.1%

In October 2022, Alliant Energy, IPL and WPL reallocated credit facility capacity amounts to $500 million for Alliant Energy at the parent company level, $200 million for IPL and $300 million for WPL, within the $1 billion total commitment.

NOTE ~~6(b)~~7(b) Long-term Debt - In February 2022, AEF issued $350 million of 3.6% senior notes due 2032. The net proceeds from the issuance were used to reduce Alliant Energy’s outstanding commercial paper and for general corporate purposes. In March 2022, AEF entered into a $300 million variable rate ~~(1%~~(3% as of ~~March 31,~~September 30, 2022) term loan credit agreement (with Alliant Energy as guarantor), which expires in March 2024, and used the borrowings under this agreement to retire its $300 million variable rate term loan credit agreement that expired in March 2022.

In August 2022, WPL issued $600 million of 3.95% debentures due 2032. The debentures were issued as green bonds, and an amount equal to or in excess of the net proceeds will be disbursed for the development and acquisition of WPL’s solar EGUs.

In September 2022, Corporate Services retired its $75 million, 3.45% senior notes due 2022.


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NOTE 7.8. REVENUES

Disaggregation of revenues from contracts with customers, which correlates to revenues for each reportable segment, was as follows (in millions):


		Alliant Energy		IPL		WPL			Alliant Energy		IPL		WPL
Three Months Ended March 31		2022	2021	2022	2021	2022	2021
Three Months Ended September 30								Three Months Ended September 30	2022	2021	2022	2021	2022	2021
Electric Utility:	Electric Utility:							Electric Utility:
Retail - residential	Retail - residential	$293	$262	$150	$139	$143	$123	Retail - residential	$376	$348	$222	$207	$154	$141
Retail - commercial	Retail - commercial	188	172	118	110	70	62	Retail - commercial	243	232	165	160	78	72
Retail - industrial	Retail - industrial	211	202	111	112	100	90	Retail - industrial	289	265	172	158	117	107
Wholesale	Wholesale	47	40	15	11	32	29	Wholesale	68	55	19	18	49	37
Bulk power and other	Bulk power and other	34	25	6	14	28	11	Bulk power and other	63	39	18	12	45	27
Total Electric Utility	Total Electric Utility	773	701	400	386	373	315	Total Electric Utility	1,039	939	596	555	443	384
Gas Utility:	Gas Utility:							Gas Utility:
Retail - residential	Retail - residential	158	99	85	52	73	47	Retail - residential	28	24	14	14	14	10
Retail - commercial	Retail - commercial	82	53	40	27	42	26	Retail - commercial	18	13	8	8	10	5
Retail - industrial	Retail - industrial	8	5	5	3	3	2	Retail - industrial	4	3	3	3	1	—
Transportation/other	Transportation/other	14	13	9	9	5	4	Transportation/other	12	10	8	6	4	4
Total Gas Utility	Total Gas Utility	262	170	139	91	123	79	Total Gas Utility	62	50	33	31	29	19
Other Utility:	Other Utility:							Other Utility:
Steam	Steam	9	9	9	9	—	—	Steam	9	9	9	9	—	—
Other utility	Other utility	2	4	2	3	—	1	Other utility	2	4	2	4	—	—
Total Other Utility	Total Other Utility	11	13	11	12	—	1	Total Other Utility	11	13	11	13	—	—
Non-Utility and Other:	Non-Utility and Other:							Non-Utility and Other:
Travero and other	Travero and other	22	17	—	—	—	—	Travero and other	23	22	—	—	—	—

Total Non-Utility and Other	Total Non-Utility and Other	22	17	—	—	—	—	Total Non-Utility and Other	23	22	—	—	—	—
Total revenues	Total revenues	$1,068	$901	$550	$489	$496	$395	Total revenues	$1,135	$1,024	$640	$599	$472	$403



	Alliant Energy		IPL		WPL
Nine Months Ended September 30	2022	2021	2022	2021	2022	2021
Electric Utility:
Retail - residential	$956	$868	$529	$488	$427	$380
Retail - commercial	628	579	411	385	217	194
Retail - industrial	743	677	418	386	325	291
Wholesale	168	142	49	44	119	98
Bulk power and other	129	91	31	40	98	51
Total Electric Utility	2,624	2,357	1,438	1,343	1,186	1,014
Gas Utility:
Retail - residential	237	162	127	90	110	72
Retail - commercial	127	85	62	47	65	38
Retail - industrial	15	11	10	8	5	3
Transportation/other	39	31	25	20	14	11
Total Gas Utility	418	289	224	165	194	124
Other Utility:
Steam	29	27	29	27	—	—
Other utility	6	9	5	8	1	1
Total Other Utility	35	36	34	35	1	1
Non-Utility and Other:
Travero and other	70	60	—	—	—	—

Total Non-Utility and Other	70	60	—	—	—	—
Total revenues	$3,147	$2,742	$1,696	$1,543	$1,381	$1,139

NOTE 8.9. INCOME TAXES

Income Tax Rates - Overall effective income tax rates, which were computed by dividing income tax expense (benefit) by income before income taxes, were as follows. The effective income tax rates were different than the federal statutory rate primarily due to state income taxes, production tax credits, amortization of excess deferred taxes and the effect of rate-making on property-related differences. The increases in Alliant Energy’s and WPL’s overall effective income tax rates for the three ~~months ended March 31, 2022 compared to the same period in 2021 were primarily due to decreased amortization of excess deferred taxes primarily at WPL.~~

Alliant Energy IPL WPL
2022 2021 2022 2021 2022 2021
Overall income tax rate 4% (19%) (14%) (17%) 19% (29%)


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and nine months ended September 30, 2022 compared to the same periods in 2021 were primarily due to decreased amortization of excess deferred taxes primarily at WPL.


	Alliant Energy				IPL				WPL
	Three Months		Nine Months		Three Months		Nine Months		Three Months		Nine Months
	2022	2021	2022	2021	2022	2021	2022	2021	2022	2021	2022	2021
Overall income tax rate	6%	(9%)	4%	(13%)	(12%)	(8%)	(14%)	(11%)	15%	(19%)	17%	(24%)

Deferred Tax Assets and Liabilities -

Carryforwards - In the third quarter of 2022, Alliant Energy, IPL and WPL fully utilized their respective federal net operating losses carryforwards. At ~~March 31,~~September 30, 2022, the remaining carryforwards and expiration dates were estimated as follows (in millions):


		Range of Expiration Dates	Alliant Energy	IPL	WPL		Range of Expiration Dates	Alliant Energy	IPL	WPL
Federal net operating losses		2037	$94	$87	$1

State net operating losses	State net operating losses	2022-2042	578	13	2	State net operating losses	2022-2042	$500	$9	$2
Federal tax credits	Federal tax credits	2022-2042	589	369	197	Federal tax credits	2022-2042	655	437	208

Iowa Tax Reform - In March 2022, Iowa tax reform was ~~enacted, which would reduce the current 9.8% Iowa corporate income tax rate beginning in 2023 if certain state income tax revenue triggers are satisfied.~~enacted. Annually, and by each November 1, the Iowa Department of Revenue will establish corporate income tax rates for the next tax year based on net corporate income tax receipts for the prior tax ~~year. Rate~~year, and reduce such rates if certain state income tax revenue triggers are satisfied. These corporate income tax rate reductions are currently expected to occur over a period of several years, with a target corporate income tax rate of 5.5%., compared to the current 9.8% Iowa corporate income tax rate. In September 2022, the Iowa Department of Revenue announced an Iowa corporate income tax rate of 8.4%, effective January 1, 2023. Deferred tax assets and liabilities are measured at the enacted tax rate expected to be applied when temporary differences are to be realized or settled. Given the announcement of the new Iowa corporate income tax rate, Alliant Energy’s and IPL’s deferred tax liabilities were remeasured based upon the new rate effective January 1, 2023, which resulted in a $76 million reduction of Alliant Energy’s and IPL’s tax-related regulatory assets and a decrease in their deferred tax liabilities in the third quarter of 2022. The reduction in tax-related regulatory assets is expected to provide cost benefits to IPL’s customers in the future. Alliant Energy parent company’s deferred tax assets were remeasured based upon the new rate effective January 1, 2023, which resulted in a charge of $8 million recorded to income tax expense in Alliant Energy’s income statement and a decrease in deferred income tax assets on Alliant Energy’s balance sheet in the third quarter of 2022. Alliant Energy is currently unable to predict with certainty the timing or amount of any future rate reductions. The majority of any reduction in income tax expense as a result of the lower Iowa corporate income tax rate is currently expected to reduce rates for IPL’s customers. In addition, after the 2023 corporate income tax rate is known in the fourth quarter of 2022, Alliant Energy currently expects to record a charge related to the remeasurement of accumulated deferred income tax assets at its non-utility businesses.

NOTE 9.10. BENEFIT PLANS

NOTE ~~9(a)~~10(a) Pension and OPEB Plans -

Net Periodic Benefit Costs - The components of net periodic benefit costs for sponsored defined benefit pension and OPEB plans for the three and nine months ended ~~March 31~~September 30 are included below (in millions). For IPL and WPL, amounts are for their plan participants covered under plans they sponsor, as well as amounts directly assigned to them related to certain participants in the Alliant Energy and Corporate Services sponsored plans.


		Defined Benefit Pension Plans		OPEB Plans	Defined Benefit Pension Plans					OPEB Plans
					Three Months			Nine Months		Three Months		Nine Months
Alliant Energy	Alliant Energy	2022	2021			2022	2021		Alliant Energy	2022	2021	2022	2021	2022	2021	2022	2021
Service cost	Service cost	$2	$3			$1	$1		Service cost	$3	$2	$7	$8	$—	$1	$2	$3
Interest cost	Interest cost	9	8			1	1		Interest cost	9	9	27	26	1	1	4	3
Expected return on plan assets	Expected return on plan assets	(17)	(17)			(1)	(1)		Expected return on plan assets	(18)	(17)	(52)	(51)	—	(1)	(3)	(3)

Amortization of prior service credit									Amortization of prior service credit	—	(1)	—	(1)	—	—	—	—
Amortization of actuarial loss	Amortization of actuarial loss	8	10			1	1		Amortization of actuarial loss	8	10	24	29	1	1	2	3

		$2	$4			$2	$2			$2	$3	$6	$11	$2	$2	$5	$6


		Defined Benefit Pension Plans		OPEB Plans	Defined Benefit Pension Plans					OPEB Plans
					Three Months			Nine Months		Three Months		Nine Months
IPL	IPL	2022	2021			2022	2021		IPL	2022	2021	2022	2021	2022	2021	2022	2021
Service cost	Service cost	$2	$2			$—	$—		Service cost	$1	$1	$4	$5	$—	$—	$1	$1
Interest cost	Interest cost	4	4			1	1		Interest cost	4	4	12	12	1	1	2	2
Expected return on plan assets	Expected return on plan assets	(8)	(8)			(1)	(1)		Expected return on plan assets	(7)	(8)	(23)	(24)	(1)	(1)	(3)	(3)

Amortization of actuarial loss	Amortization of actuarial loss	3	4			—	—		Amortization of actuarial loss	3	5	10	13	—	—	—	1
		$1	$2			$—	$—			$1	$2	$3	$6	$—	$—	$—	$1

Defined Benefit Pension Plans OPEB Plans
WPL 2022 2021 2022 2021
Service cost $1 $1 $— $—
Interest cost 4 4 1 —
Expected return on plan assets (8) (8) — —
Amortization of actuarial loss 4 5 — 1
$1 $2 $1 $1


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Table of Contents


	Defined Benefit Pension Plans				OPEB Plans
	Three Months		Nine Months		Three Months		Nine Months
WPL	2022	2021	2022	2021	2022	2021	2022	2021
Service cost	$—	$1	$2	$3	$—	$1	$—	$1
Interest cost	4	3	12	11	1	—	2	1
Expected return on plan assets	(7)	(8)	(23)	(23)	—	—	—	—

Amortization of actuarial loss	4	5	12	14	—	1	1	2

	$1	$1	$3	$5	$1	$2	$3	$4

NOTE ~~9(b)~~10(b) Equity-based Compensation Plans - A summary of compensation expense, including amounts allocated to IPL and WPL, and the related income tax benefits recognized for share-based compensation awards for the three and nine months ended ~~March 31~~September 30 was as follows (in millions):


		Alliant Energy		IPL	WPL		Alliant Energy				IPL				WPL
							Three Months	Nine Months			Three Months		Nine Months		Three Months		Nine Months
		2022	2021		2022	2021			2022	2021			2022	2021	2022	2021	2022	2021	2022	2021	2022	2021	2022	2021
Compensation expense	Compensation expense	$4	$3		$2	$1			$2	$1		Compensation expense	$3	$4	$9	$9	$2	$2	$5	$5	$1	$2	$4	$4
Income tax benefits	Income tax benefits	1	1		1	—			—	—		Income tax benefits	1	1	3	3	—	—	1	1	—	—	1	1

As of ~~March 31,~~September 30, 2022, Alliant Energy’s, IPL’s and WPL’s total unrecognized compensation cost related to share-based compensation awards was ~~$15 million,~~ $8 million, $5 million and $6$3 million, respectively, which is expected to be recognized over a weighted average period of between 1 year and 2 years.


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For the ~~three~~nine months ended ~~March 31,~~September 30, 2022, performance shares, performance restricted stock units and restricted stock units were granted to key employees under existing plans as follows. These shares and units will be paid out in shares of common stock, and are therefore accounted for as equity awards.


			Weighted Average			Weighted Average
		Grants	Grant Date Fair Value		Grants	Grant Date Fair Value
Performance shares	Performance shares	70,240	$54.45	Performance shares	74,106	$54.45
Performance restricted stock units	Performance restricted stock units	80,252	56.62	Performance restricted stock units	84,670	57.01
Restricted stock units	Restricted stock units	74,360	56.62	Restricted stock units	77,122	56.88

As of ~~March 31,~~September 30, 2022, ~~322,288~~285,909 shares were included in the calculation of diluted EPS related to the nonvested equity awards.

NOTE ~~10.~~11. DERIVATIVE INSTRUMENTS

Commodity Derivatives -

Notional Amounts - As of ~~March 31,~~September 30, 2022, gross notional amounts and settlement/delivery years related to outstanding swap contracts, option contracts, physical forward contracts and FTRs that were accounted for as commodity derivative instruments were as follows (units in thousands):


		FTRs		Natural Gas		Coal		Diesel Fuel		Electricity				FTRs		Natural Gas		Coal		Diesel Fuel
			MWhs	Years	Dths	Years	Tons	Years	Gallons		Years		MWhs	Years	MWhs	Years	Dths	Years	Tons	Years	Gallons	Years
Alliant Energy	Alliant Energy		3,304	2022	175,658	2022-2030	2,653	2022-2023	2,268		2022	Alliant Energy	1,379	2022-2024	14,454	2022-2023	249,508	2022-2032	1,566	2022-2023	756	2022
IPL	IPL		784	2022	94,175	2022-2030	1,053	2022-2023	—		—	IPL	768	2022-2024	6,165	2022-2023	135,193	2022-2030	669	2022-2023	—	—
WPL	WPL		2,520	2022	81,483	2022-2030	1,600	2022-2023	2,268		2022	WPL	611	2022-2023	8,289	2022-2023	114,315	2022-2032	897	2022-2023	756	2022

Financial Statement Presentation - Derivative instruments are recorded at fair value each reporting date on the balance sheets as assets or liabilities as follows (in millions):


		Alliant Energy		IPL		WPL			Alliant Energy		IPL		WPL
		March 31, 2022	December 31, 2021	March 31, 2022	December 31, 2021	March 31, 2022	December 31, 2021		September 30, 2022	December 31, 2021	September 30, 2022	December 31, 2021	September 30, 2022	December 31, 2021
Current derivative assets	Current derivative assets	$151	$113	$68	$48	$83	$65	Current derivative assets	$200	$113	$117	$48	$83	$65
Non-current derivative assets	Non-current derivative assets	110	63	59	36	51	27	Non-current derivative assets	160	63	85	36	75	27
Current derivative liabilities	Current derivative liabilities	6	8	3	4	3	4	Current derivative liabilities	71	8	54	4	17	4
Non-current derivative liabilities	Non-current derivative liabilities	1	1	1	—	—	1	Non-current derivative liabilities	27	1	12	—	15	1


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During the ~~three~~nine months ended ~~March 31,~~September 30, 2022, Alliant Energy’s, IPL’s and WPL’s derivative assets increased primarily due to the annual FTR auction operated by MISO and as a result of higher natural gas prices. Alliant Energy’s, IPL’s and WPL’s derivative liabilities increased primarily due to new natural gas contracts entered into in the second quarter of 2022. Based on IPL’s and WPL’s ~~natural gas~~ cost recovery mechanisms, ~~this~~the changes in the fair value of derivative liabilities/assets resulted in ~~corresponding increases in derivative~~comparable changes to regulatory assets/liabilities on the balance sheets.

Credit Risk-related Contingent Features - Various agreements contain credit risk-related contingent features, including requirements to maintain certain credit ratings and/or limitations on liability positions under the agreements based on credit ratings. Certain of these agreements with credit risk-related contingency features are accounted for as derivative instruments. In the event of a material change in creditworthiness or if liability positions exceed certain contractual limits, credit support may need to be provided ~~in the form of letters of credit or cash collateral~~ up to the amount of exposure under the contracts, or the contracts may need to be unwound and underlying liability positions paid. At ~~March 31,~~September 30, 2022 and December 31, 2021, the aggregate fair value of all derivative instruments with credit risk-related contingent features in a net liability position was not materially different than amounts that would be required to be posted as credit support to counterparties by Alliant Energy, IPL or WPL if the most restrictive credit risk-related contingent features for derivative agreements in a net liability position were triggered.

Balance Sheet Offsetting - The fair value amounts of derivative instruments subject to a master netting arrangement are not netted by counterparty on the balance sheets. However, if the fair value amounts of derivative instruments by counterparty were netted, ~~amounts would not be materially different from gross amounts of~~ derivative assets and derivative liabilities ~~at March 31, 2022 and December 31, 2021.~~ related to commodity contracts would have been presented on the balance sheets as follows (in millions):


	Alliant Energy		IPL		WPL
	Gross		Gross		Gross
	(as reported)	Net	(as reported)	Net	(as reported)	Net
September 30, 2022
Derivative assets	$360	$308	$202	$165	$158	$143
Derivative liabilities	98	46	66	29	32	17
December 31, 2021
Derivative assets	176	171	84	83	92	88
Derivative liabilities	9	4	4	3	5	1

Fair value amounts recognized for the right to reclaim cash collateral (receivable) or the obligation to return cash collateral (payable) are not offset against fair value amounts recognized for derivative instruments executed with the same counterparty under the same master netting arrangement.


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~~Table of Contents~~

NOTE ~~11.~~12. FAIR VALUE MEASUREMENTS

Fair Value of Financial Instruments - The carrying amounts of current assets and current liabilities approximate fair value because of the short maturity of such financial instruments. Carrying amounts and related estimated fair values of other financial instruments were as follows (in millions):


Alliant Energy	Alliant Energy	March 31, 2022					December 31, 2021					Alliant Energy	September 30, 2022					December 31, 2021
			Fair Value					Fair Value						Fair Value					Fair Value
		Carrying	Level	Level	Level		Carrying	Level	Level	Level			Carrying	Level	Level	Level		Carrying	Level	Level	Level
		Amount	1	2	3	Total	Amount	1	2	3	Total		Amount	1	2	3	Total	Amount	1	2	3	Total
Assets:	Assets:											Assets:
Money market fund investments	Money market fund investments	$59	$59	$—	$—	$59	$32	$32	$—	$—	$32	Money market fund investments	$334	$334	$—	$—	$334	$32	$32	$—	$—	$32
Derivatives	Derivatives	261	—	251	10	261	176	—	146	30	176	Derivatives	360	—	295	65	360	176	—	146	30	176
Deferred proceeds	Deferred proceeds	227	—	—	227	227	214	—	—	214	214	Deferred proceeds	248	—	—	248	248	214	—	—	214	214
Liabilities:	Liabilities:											Liabilities:
Derivatives	Derivatives	7	—	7	—	7	9	—	8	1	9	Derivatives	98	—	78	20	98	9	—	8	1	9
Long-term debt (incl. current maturities)	Long-term debt (incl. current maturities)	7,716	—	7,971	1	7,972	7,368	—	8,329	1	8,330	Long-term debt (incl. current maturities)	8,228	—	7,473	1	7,474	7,368	—	8,329	1	8,330

IPL March 31, 2022 December 31, 2021
Fair Value Fair Value
Carrying Level Level Level Carrying Level Level Level
Amount 1 2 3 Total Amount 1 2 3 Total
Assets:
Money market fund investments $59 $59 $— $— $59 $32 $32 $— $— $32
Derivatives 127 — 120 7 127 84 — 65 19 84
Deferred proceeds 227 — — 227 227 214 — — 214 214
Liabilities:
Derivatives 4 — 4 — 4 4 — 3 1 4
Long-term debt 3,644 — 3,738 — 3,738 3,643 — 4,124 — 4,124

WPL March 31, 2022 December 31, 2021
Fair Value Fair Value
Carrying Level Level Level Carrying Level Level Level
Amount 1 2 3 Total Amount 1 2 3 Total
Assets:
Derivatives $134 $— $131 $3 $134 $92 $— $81 $11 $92
Liabilities:
Derivatives 3 — 3 — 3 5 — 5 — 5
Long-term debt (incl. current maturities) 2,430 — 2,592 — 2,592 2,429 — 2,862 — 2,862


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Table of Contents


IPL	September 30, 2022					December 31, 2021
		Fair Value					Fair Value
	Carrying	Level	Level	Level		Carrying	Level	Level	Level
	Amount	1	2	3	Total	Amount	1	2	3	Total
Assets:
Money market fund investments	$39	$39	$—	$—	$39	$32	$32	$—	$—	$32
Derivatives	202	—	150	52	202	84	—	65	19	84
Deferred proceeds	248	—	—	248	248	214	—	—	214	214
Liabilities:
Derivatives	66	—	47	19	66	4	—	3	1	4
Long-term debt	3,645	—	3,228	—	3,228	3,643	—	4,124	—	4,124


WPL	September 30, 2022					December 31, 2021
		Fair Value					Fair Value
	Carrying	Level	Level	Level		Carrying	Level	Level	Level
	Amount	1	2	3	Total	Amount	1	2	3	Total
Assets:
Money market fund investments	$295	$295	$—	$—	$295	$—	$—	$—	$—	$—
Derivatives	158	—	145	13	158	92	—	81	11	92
Liabilities:
Derivatives	32	—	31	1	32	5	—	5	—	5
Long-term debt (incl. current maturities)	3,019	—	2,778	—	2,778	2,429	—	2,862	—	2,862

Information for fair value measurements using significant unobservable inputs (Level 3 inputs) was as follows (in millions):

Alliant Energy Commodity Contract Derivative
Assets and (Liabilities), net Deferred Proceeds
Three Months Ended March 31 2022 2021 2022 2021
Beginning balance, January 1 $29 $29 $214 $188
Total net losses included in changes in net assets (realized/unrealized) (6) (6) — —
Settlements (a) (13) (7) 13 (81)
Ending balance, March 31 $10 $16 $227 $107
The amount of total net losses for the period included in changes in net liabilities attributable to the change in unrealized losses relating to liabilities held at March 31 ($5) ($6) $— $—


Alliant Energy	Commodity Contract Derivative
	Assets and (Liabilities), net		Deferred Proceeds
Three Months Ended September 30	2022	2021	2022	2021
Beginning balance, July 1	$72	$39	$244	$154
Total net gains (losses) included in changes in net assets (realized/unrealized)	(1)	5	—	—

Transfers out of Level 3	—	(8)	—	—


Settlements (a)	(26)	(7)	4	10
Ending balance, September 30	$45	$29	$248	$164
The amount of total net gains (losses) for the period included in changes in net assets attributable to the change in unrealized gains (losses) relating to assets and liabilities held at September 30	($1)	$5	$—	$—


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Alliant Energy	Commodity Contract Derivative
	Assets and (Liabilities), net		Deferred Proceeds
Nine Months Ended September 30	2022	2021	2022	2021
Beginning balance, January 1	$29	$29	$214	$188
Total net gains (losses) included in changes in net assets (realized/unrealized)	(17)	6	—	—

Transfers out of Level 3	—	(8)	—	—
Purchases	79	21	—	—

Settlements (a)	(46)	(19)	34	(24)
Ending balance, September 30	$45	$29	$248	$164
The amount of total net gains (losses) for the period included in changes in net assets attributable to the change in unrealized gains (losses) relating to assets and liabilities held at September 30	($17)	$6	$—	$—


IPL	Commodity Contract Derivative
	Assets and (Liabilities), net		Deferred Proceeds
Three Months Ended September 30	2022	2021	2022	2021
Beginning balance, July 1	$58	$30	$244	$154
Total net gains (losses) included in changes in net assets (realized/unrealized)	(6)	2	—	—

Transfers out of Level 3	—	(8)	—	—


Settlements (a)	(19)	(5)	4	10
Ending balance, September 30	$33	$19	$248	$164
The amount of total net gains (losses) for the period included in changes in net assets attributable to the change in unrealized gains (losses) relating to assets and liabilities held at September 30	($6)	$2	$—	$—



IPL	Commodity Contract Derivative
	Assets and (Liabilities), net		Deferred Proceeds
Nine Months Ended September 30	2022	2021	2022	2021
Beginning balance, January 1	$18	$26	$214	$188
Total net losses included in changes in net assets (realized/unrealized)	(13)	—	—	—

Transfers out of Level 3	—	(8)	—	—
Purchases	58	16	—	—

Settlements (a)	(30)	(15)	34	(24)
Ending balance, September 30	$33	$19	$248	$164
The amount of total net losses for the period included in changes in net assets attributable to the change in unrealized losses relating to assets and liabilities held at September 30	($14)	$—	$—	$—


WPL	Commodity Contract Derivative
	Assets and (Liabilities), net
Three Months Ended September 30	2022	2021
Beginning balance, July 1	$14	$9
Total net gains included in changes in net assets (realized/unrealized)	5	3




Settlements	(7)	(2)
Ending balance, September 30	$12	$10
The amount of total net gains for the period included in changes in net assets attributable to the change in unrealized gains relating to assets and liabilities held at September 30	$5	$3

IPL Commodity Contract Derivative
Assets and (Liabilities), net Deferred Proceeds
Three Months Ended March 31 2022 2021 2022 2021
Beginning balance, January 1 $18 $26 $214 $188
Total net losses included in changes in net assets (realized/unrealized) (4) (5) — —
Settlements (a) (7) (6) 13 (81)
Ending balance, March 31 $7 $15 $227 $107
The amount of total net losses for the period included in changes in net liabilities attributable to the change in unrealized losses relating to liabilities held at March 31 ($4) ($6) $— $—

WPL Commodity Contract Derivative
Assets and (Liabilities), net
Three Months Ended March 31 2022 2021
Beginning balance, January 1 $11 $3
Total net losses included in changes in net assets (realized/unrealized) (2) (1)
Settlements (6) (1)
Ending balance, March 31 $3 $1
The amount of total net losses for the period included in changes in net liabilities attributable to the change in unrealized losses relating to liabilities held at March 31 ($1) $—

Table of Contents



WPL	Commodity Contract Derivative
	Assets and (Liabilities), net
Nine Months Ended September 30	2022	2021
Beginning balance, January 1	$11	$3
Total net gains (losses) included in changes in net assets (realized/unrealized)	(4)	6


Purchases	21	5

Settlements	(16)	(4)
Ending balance, September 30	$12	$10
The amount of total net gains (losses) for the period included in changes in net assets attributable to the change in unrealized gains (losses) relating to assets and liabilities held at September 30	($3)	$6

(a)Settlements related to deferred proceeds are due to the change in the carrying amount of receivables sold less the allowance for expected credit losses associated with the receivables sold and cash amounts received from the receivables sold.

Commodity Contracts - The fair value of FTR and natural gas commodity contracts categorized as Level 3 was recognized as net derivative assets (liabilities) as follows (in millions):


		Alliant Energy		IPL		WPL			Alliant Energy		IPL		WPL
		Excluding FTRs	FTRs	Excluding FTRs	FTRs	Excluding FTRs	FTRs		Excluding FTRs	FTRs	Excluding FTRs	FTRs	Excluding FTRs	FTRs
March 31, 2022		$3	$7	$3	$4	$—	$3
September 30, 2022								September 30, 2022	($14)	$59	($15)	$48	$1	$11
December 31, 2021	December 31, 2021	9	20	8	10	1	10	December 31, 2021	9	20	8	10	1	10

NOTE ~~12.~~13. COMMITMENTS AND CONTINGENCIES

NOTE ~~12(a)~~13(a) Capital Purchase Commitments - Various contractual obligations contain minimum future commitments related to capital expenditures for certain construction projects, including WPL’s expansion of solar generation. At ~~March 31,~~September 30, 2022, Alliant Energy’s and WPL’s minimum future commitments for these projects were ~~$214~~$208 million and ~~$213~~$206 million, respectively.

NOTE ~~12(b)~~13(b) Other Purchase Commitments - Various commodity supply, transportation and storage contracts help meet obligations to provide electricity and natural gas to utility customers. In addition, there are various purchase commitments associated with other goods and services. At ~~March 31,~~September 30, 2022, related minimum future commitments were as follows (in millions):


		Alliant Energy	IPL	WPL		Alliant Energy	IPL	WPL

Natural gas	Natural gas	$939	$472	$467	Natural gas	$1,608	$742	$866
Coal	Coal	127	72	55	Coal	197	95	102
Other (a)	Other (a)	135	66	36	Other (a)	126	57	28
		$1,201	$610	$558		$1,931	$894	$996

(a)Includes individual commitments incurred during the normal course of business that exceeded $1 million at ~~March 31,~~September 30, 2022.

NOTE ~~12(c)~~13(c) Guarantees and Indemnifications -

Whiting Petroleum - Whiting Petroleum is an independent oil and gas company. In 2004, Alliant Energy sold its remaining interest in Whiting Petroleum. Alliant Energy Resources, LLC, as the successor to a predecessor entity that owned Whiting Petroleum, and a wholly-owned subsidiary of AEF, continues to guarantee the partnership obligations of an affiliate of Whiting Petroleum under multiple general partnership agreements in the oil and gas industry. The guarantees do not include a maximum limit. Based on information made available to Alliant Energy by Whiting Petroleum, the Whiting Petroleum affiliate holds an approximate 6% share in the partnerships, and currently known obligations include costs associated with the future abandonment of certain facilities owned by the partnerships. The general partnerships were formed under California law, and Alliant Energy Resources, LLC may need to perform under the guarantees if the affiliate of Whiting Petroleum is unable to meet its partnership obligations.


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~~Table of Contents~~

As of ~~March 31,~~September 30, 2022, the currently known partnership obligations for the abandonment obligations are estimated at ~~$60~~$58 million, which represents Alliant Energy’s currently estimated maximum exposure under the guarantees. Alliant Energy estimates its expected loss to be a portion of the ~~$60~~$58 million of known partnership abandonment obligations of the Whiting Petroleum affiliate and the other partners. Alliant Energy is not aware of any material liabilities related to these guarantees that it is probable that it will be obligated to pay; however, as of both ~~March 31,~~September 30, 2022 and December 31, 2021, a liability of $5 million is recorded in “Other liabilities” on Alliant Energy’s balance sheets for expected credit losses related to the contingent obligations that are in the scope of these guarantees.


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Whiting Petroleum completed a business combination with Oasis Petroleum Inc. in July 2022. The combined operations are now known as Chord Energy Corporation. The business combination is not expected to affect the scope of the Whiting Petroleum affiliate’s obligations to Alliant Energy or Alliant Energy’s related guarantees.

Non-utility Wind Farm in Oklahoma - In 2017, a wholly-owned subsidiary of AEF acquired a cash equity ownership interest in a non-utility wind farm located in Oklahoma. The wind farm provides electricity to a third party under a long-term PPA. Alliant Energy provided a parent guarantee of its subsidiary’s indemnification obligations under the related operating agreement and PPA. Alliant Energy’s obligations under the operating agreement were ~~$67~~$59 million as of ~~March 31,~~September 30, 2022 and will reduce annually until expiring in July 2047. Alliant Energy’s obligations under the PPA are subject to a maximum limit of $17 million and expire in December 2031, subject to potential extension. Alliant Energy is not aware of any material liabilities related to this guarantee that it is probable that it will be obligated to pay and therefore has not recognized any material liabilities related to this guarantee as of ~~March 31,~~September 30, 2022 and December 31, 2021.

NOTE ~~12(d)~~13(d) Environmental Matters -

Manufactured Gas Plant (MGP) Sites - IPL and WPL have current or previous ownership interests in various sites that are previously associated with the production of gas for which IPL and WPL have, or may have in the future, liability for investigation, remediation and monitoring costs. IPL and WPL are working pursuant to the requirements of various federal and state agencies to investigate, mitigate, prevent and remediate, where necessary, the environmental impacts to property, including natural resources, at and around these former MGP sites in order to protect public health and the environment. At ~~March 31,~~September 30, 2022, estimated future costs expected to be incurred for the investigation, remediation and monitoring of the MGP sites, as well as environmental liabilities recorded on the balance sheets for these sites, which are not discounted, were as follows (in millions). At ~~March 31,~~September 30, 2022, such amounts for WPL were not material.


		Alliant Energy			IPL				Alliant Energy			IPL
Range of estimated future costs	Range of estimated future costs	$10	-	$26	$7	-	$20	Range of estimated future costs	$9	-	$25	$6	-	$19
Current and non-current environmental liabilities	Current and non-current environmental liabilities	$12			$9			Current and non-current environmental liabilities	$12			$8

IPL Consent Decree - In 2015, the U.S. District Court for the Northern District of Iowa approved a Consent Decree that IPL entered into with the EPA, the Sierra Club, the State of Iowa and Linn County in Iowa, thereby resolving potential Clean Air Act issues associated with emissions from IPL’s coal-fired generating facilities in Iowa. IPL has completed various requirements under the Consent Decree. IPL’s remaining requirements include fuel switching or retiring Prairie Creek Units 1 and 3 by December 31, 2025. Alliant Energy and IPL currently expect to recover material costs incurred by IPL related to compliance with the terms of the Consent Decree from IPL’s electric customers.

Other Environmental Contingencies - In addition to the environmental liabilities discussed above, various environmental rules are monitored that may have a significant impact on future operations. Several of these environmental rules are subject to legal challenges, reconsideration and/or other uncertainties. Given uncertainties regarding the outcome, timing and compliance plans for these environmental matters, the complete financial impact of each of these rules is not able to be determined; however, future capital investments and/or modifications to EGUs and electric and gas distribution systems to comply with certain of these rules could be significant. Specific current, proposed or potential environmental matters include, among others: Effluent Limitation Guidelines, Coal Combustion Residuals Rule, and various legislation and EPA regulations to monitor and regulate the emission of greenhouse gases, including the Clean Air Act.

NOTE ~~12(e) Collective Bargaining Agreements~~13(e) MISO Transmission Owner Return on Equity Complaints - ~~At March 31,~~A group of stakeholders, including MISO cooperative and municipal utilities, previously filed complaints with FERC requesting a reduction to the base return on equity authorized for MISO transmission owners, including ITC Midwest LLC and ATC. In 2019, FERC issued an order on the previously filed complaints and reduced the base return on equity authorized for the MISO transmission owners to 9.88% for November 12, 2013 through February 11, 2015, and subsequent to September 28, 2016. In 2020, FERC issued orders in response to various rehearing requests and increased the base return on equity authorized for the MISO transmission owners from 9.88% to 10.02% for November 12, 2013 through February 11, 2015, and subsequent to September 28, 2016. In August 2022, ~~employees covered by collective bargaining agreements represented 55%, 70%~~the U.S. Court of Appeals for the District of Columbia Circuit vacated FERC’s prior orders that established the base return on equity authorized for the MISO transmission owners and ~~83%~~remanded the cases to FERC for further proceedings, which may result in additional changes to the base return on equity authorized for the MISO transmission owners. As a result of ~~total employees of~~the August 2022 court decision, Alliant Energy ~~IPL~~recorded a $5 million reduction in “Equity income from unconsolidated investments” in its income statement for the three and ~~WPL, respectively. In May~~nine months ended September 30, 2022 ~~WPL’s collective bargaining agreement with International Brotherhood~~to reflect the anticipated reduction in the base return on equity authorized for the MISO transmission owners. Any further changes in FERC’s decisions may have an impact on Alliant Energy’s share of ~~Electrical Workers Local 965 expires, representing 26%~~ATC’s future earnings and 83% of total employees of Alliant Energy and WPL, respectively. While the process to renew the agreement is underway and a tentative agreement has been reached, Alliant Energy and WPL are currently unable to predict the outcome.customer costs.


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NOTE ~~13.~~14. SEGMENTS OF BUSINESS

Certain financial information relating to Alliant Energy’s, IPL’s and WPL’s business segments is as follows. Intersegment revenues were not material to their respective operations.


Alliant Energy	Alliant Energy					ATC Holdings,	Alliant	Alliant Energy					ATC Holdings,	Alliant
		Utility				Non-Utility,	Energy		Utility				Non-Utility,	Energy
		Electric	Gas	Other	Total	Parent and Other	Consolidated		Electric	Gas	Other	Total	Parent and Other	Consolidated
		(in millions)							(in millions)
Three Months Ended March 31, 2022
Three Months Ended September 30, 2022								Three Months Ended September 30, 2022
Revenues	Revenues	$773	$262	$11	$1,046	$22	$1,068	Revenues	$1,039	$62	$11	$1,112	$23	$1,135
Operating income		181	57	3	241	7	248
Operating income (loss)								Operating income (loss)	304	(3)	1	302	7	309
Net income (loss) attributable to Alliant Energy common shareowners								Net income (loss) attributable to Alliant Energy common shareowners				245	(18)	227
Three Months Ended September 30, 2021								Three Months Ended September 30, 2021
Revenues								Revenues	$939	$50	$13	$1,002	$22	$1,024
Operating income (loss)								Operating income (loss)	290	(5)	(5)	280	9	289
Net income attributable to Alliant Energy common shareowners	Net income attributable to Alliant Energy common shareowners				179	13	192	Net income attributable to Alliant Energy common shareowners				250	6	256
Three Months Ended March 31, 2021
Revenues		$701	$170	$13	$884	$17	$901
Operating income		147	44	2	193	5	198
Net income attributable to Alliant Energy common shareowners					163	8	171



Alliant Energy					ATC Holdings,	Alliant
	Utility				Non-Utility,	Energy
	Electric	Gas	Other	Total	Parent and Other	Consolidated
	(in millions)
Nine Months Ended September 30, 2022
Revenues	$2,624	$418	$35	$3,077	$70	$3,147
Operating income	680	62	4	746	23	769
Net income attributable to Alliant Energy common shareowners				574	5	579
Nine Months Ended September 30, 2021
Revenues	$2,357	$289	$36	$2,682	$60	$2,742
Operating income (loss)	601	42	(4)	639	24	663
Net income attributable to Alliant Energy common shareowners				537	34	571


IPL	Electric	Gas	Other	Total
	(in millions)
Three Months Ended September 30, 2022
Revenues	$596	$33	$11	$640
Operating income (loss)	174	(3)	—	171
Net income available for common stock				154
Three Months Ended September 30, 2021
Revenues	$555	$31	$13	$599
Operating income (loss)	186	(3)	(3)	180
Net income available for common stock				157
Nine Months Ended September 30, 2022
Revenues	$1,438	$224	$34	$1,696
Operating income	353	33	3	389
Net income available for common stock				327
Nine Months Ended September 30, 2021
Revenues	$1,343	$165	$35	$1,543
Operating income (loss)	365	30	(1)	394
Net income available for common stock				322

IPL Electric Gas Other Total
(in millions)
Three Months Ended March 31, 2022
Revenues $400 $139 $11 $550
Operating income 75 32 3 110
Net income available for common stock 87
Three Months Ended March 31, 2021
Revenues $386 $91 $12 $489
Operating income 72 30 1 103
Net income available for common stock 79

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WPL	WPL	Electric	Gas	Other	Total	WPL	Electric	Gas	Other	Total
		(in millions)					(in millions)
Three Months Ended March 31, 2022
Three Months Ended September 30, 2022						Three Months Ended September 30, 2022
Revenues	Revenues	$373	$123	$—	$496	Revenues	$443	$29	$—	$472
Operating income	Operating income	106	25	—	131	Operating income	130	—	1	131
Net income	Net income				92	Net income				91
Three Months Ended March 31, 2021
Three Months Ended September 30, 2021						Three Months Ended September 30, 2021
Revenues						Revenues	$384	$19	$—	$403
Operating income (loss)						Operating income (loss)	104	(2)	(2)	100
Net income						Net income				93
Nine Months Ended September 30, 2022						Nine Months Ended September 30, 2022
Revenues	Revenues	$315	$79	$1	$395	Revenues	$1,186	$194	$1	$1,381
Operating income	Operating income	75	14	1	90	Operating income	327	29	1	357
Net income	Net income				84	Net income				247

Nine Months Ended September 30, 2021						Nine Months Ended September 30, 2021
Revenues						Revenues	$1,014	$124	$1	$1,139
Operating income (loss)						Operating income (loss)	236	12	(3)	245
Net income						Net income				215

NOTE ~~14.~~15. RELATED PARTIES

Service Agreements - Pursuant to service agreements, IPL and WPL receive various administrative and general services from an affiliate, Corporate Services. These services are billed to IPL and WPL at cost based on expenses incurred by Corporate Services for the benefit of IPL and WPL, respectively. These costs consisted primarily of employee compensation and benefits, fees associated with various professional services, depreciation and amortization of property, plant and equipment, and a return on net assets. Corporate Services also acts as agent on behalf of IPL and WPL pursuant to the service agreements. As agent, Corporate Services enters into energy, capacity, ancillary services, and transmission sale and purchase transactions within MISO. Corporate Services assigns such sales and purchases among IPL and WPL based on statements received from MISO. The amounts billed for services provided, sales credited and purchases for the three and nine months ended ~~March 31~~September 30 were as follows (in millions):


		IPL		WPL	IPL					WPL
					Three Months			Nine Months		Three Months		Nine Months
		2022	2021			2022	2021			2022	2021	2022	2021	2022	2021	2022	2021
Corporate Services billings	Corporate Services billings	$40	$40			$36	$35		Corporate Services billings	$45	$50	$136	$138	$39	$37	$117	$113
Sales credited	Sales credited	—	1			18	1		Sales credited	11	4	11	9	31	16	62	23
Purchases billed	Purchases billed	94	143			22	26		Purchases billed	119	105	342	347	42	24	103	71


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Net intercompany payables to Corporate Services were as follows (in millions):

IPL WPL
March 31, 2022 December 31, 2021 March 31, 2022 December 31, 2021
Net payables to Corporate Services $120 $110 $76 $83

IPL

WPL

September 30, 2022

December 31, 2021

September 30, 2022

December 31, 2021

Net payables to Corporate Services

$113

$110

$88

$83

ATC - Pursuant to various agreements, WPL receives a range of transmission services from ATC. WPL provides operation, maintenance, and construction services to ATC. WPL and ATC also bill each other for use of shared facilities owned by each party. The related amounts billed between the parties for the three and nine months ended ~~March 31~~September 30 were as follows (in millions):


				Three Months		Nine Months
		2022	2021			2022	2021	2022	2021
ATC billings to WPL	ATC billings to WPL	$34	$32		ATC billings to WPL	$38	$29	$107	$91
WPL billings to ATC	WPL billings to ATC	3	3		WPL billings to ATC	6	4	14	13

WPL owed ATC net amounts of $9 million as of ~~March 31,~~September 30, 2022 and $10 million as of December 31, 2021.

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

This MDA includes information relating to Alliant Energy, and IPL and WPL (collectively, the Utilities), as well as ATC Holdings, AEF and Corporate Services. Where appropriate, information relating to a specific entity has been segregated and labeled as such. The following discussion and analysis should be read in conjunction with the Financial Statements and the Notes included in this report, as well as the financial statements, notes and MDA included in the 2021 Form 10-K. Unless otherwise noted, all “per share” references in MDA refer to earnings per diluted share.


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2022 HIGHLIGHTS

Key highlights since the filing of the 2021 Form 10-K include the following:

Customer Investments:

•In response to a petition from a U.S.-based solar panel assembler, in March 2022, the U.S. Department of Commerce initiated an investigation into whether the sourcing of solar project materials and equipment from certain Southeast Asian countries circumvent tariffs and duties imposed on such materials and equipment imported from China. In June 2022, a presidential executive order postponed through 2024 any additional tariffs on solar project materials and equipment while the U.S. Department of Commerce completes its investigation. Alliant Energy, IPL and WPL are currently unable to predict with certainty the future outcome or impact of these ~~matters;~~matters, including from any related legal challenges; however, this could result in delays and/or higher costs for IPL’s and WPL’s planned development and acquisition of additional renewable energy, and impact Alliant Energy’s, IPL’s and WPL’s anticipated future construction and acquisition expenditures.

•In ~~April~~June 2022, the ~~IUB~~PSCW issued an order approving IPL’s request for an extension of the procedural schedule related to its November 2021 advance rate-making principles filing with the IUB for up to 400 MW of new solar generation and 75 MW of battery storage. IPL requested an extension in order to review the proposed fixed cost cap included in its November 2021 filing given the cost pressures prevalent in the solar generation and battery storage markets, as well as narrow the selection of certain solar generation projects included in the filing. IPL currently expects a decision on its advance rate-making principles filing by the end of 2022.

•~~In April 2022, WPL received an oral decision from the PSCW for its~~WPL’s second certificate of authority ~~authorizing WPL~~ to acquire, construct, own, and operate up to 414 MW of new solar generation in the following Wisconsin counties: Dodge (150 MW), Waushara (99 MW), Rock (65 MW), Grant (50 MW) and Green (50 MW).

•In June 2022, IPL filed for a revised fixed cost cap of $1,934/kilowatt with the IUB related to IPL’s November 2021 advance rate-making principles filing for up to 400 MW of solar generation with in-service dates in 2023 and 2024 and approximately 75 MW of battery storage in 2024, which reflects higher materials, labor and shipping costs. The revised fixed cost cap includes allowance for funds used during construction and transmission upgrade costs among other costs. In September 2022, IPL provided the IUB with a summary of the Inflation Reduction Act of 2022, as well as an economic analysis indicating full ownership for its planned solar and battery storage projects is currently expected to result in lower costs for its customers compared to previous plans to utilize tax equity financing. IPL currently expects a decision from the IUB on its filing by the end of 2022.

•In August 2022, FERC approved MISO’s proposal to change its methodology for procuring capacity in the energy market effective with the 2023/2024 MISO Planning Year, as a result of changes in the overall generation resource mix due to the shift to renewable generation and the retirement of certain fossil-fueled generation. The capacity construct will change from the current Summer-based annual construct to four distinct seasons to help ensure the continued reliability of the electric transmission grid. FERC’s approval also includes establishing planning reserve margin requirements for all market participants on a seasonal basis and determining a seasonal accredited capacity value for certain classes of generating resources, including higher accredited capacity for wind generation during the Spring, Fall and Winter seasons and lower accredited capacity for solar generation during the Winter season. Alliant Energy, IPL and WPL are currently unable to predict with certainty the future outcome or impact of these matters, but anticipate additional generating resources will be needed to comply with the requirements of the new capacity construct. Refer to “Liquidity and Capital Resources” for discussion of proposed changes to IPL’s and WPL’s current resource plans resulting from these matters.

•In September 2022, WPL filed a request with the PSCW for approval to construct, own and operate 175 MW of battery storage, with 100 MW and 75 MW at the Grant County and Wood County solar projects, respectively. Estimated capital expenditures for these planned projects for 2023 through 2025 are included in the “Renewables and battery storage” line in the construction and acquisition table in “Liquidity and Capital Resources.”

•In September 2022, after the enactment of the Inflation Reduction Act of 2022, WPL informed the PSCW of its decision to retain full ownership of its planned solar projects instead of financing a portion of the projects with tax equity partners, which is currently expected to result in lower costs for its customers compared to previous plans to utilize tax equity financing.

•In September 2022, WPL completed the construction of the Bear Creek Solar Garden in Richland County, Wisconsin (50 MW).

•In October 2022, WPL completed the construction of the North Rock Solar Garden in Rock County, Wisconsin (50 MW).

•Refer to Note 3 for discussion of revised expected timing for the retirements of various IPL and WPL coal-fired EGUs.

Rate Matters:

•In June 2022, WPL filed a limited reopener request with the PSCW to increase annual retail gas rates for the 2023 forward-looking Test Period by approximately $10 million, which reflects changes in weighted average cost of capital, updated depreciation rates and modifications to certain regulatory asset and regulatory liability amortizations. WPL currently expects a decision from the PSCW on its request by the end of 2022.

•In August 2022, the PSCW authorized WPL to collect $37 million in 2023 from its retail electric customers, plus interest, for an under-collection of fuel-related costs incurred by WPL in 2021 that were higher than fuel-related costs used to determine rates for such period. In addition, in November 2022, WPL filed updated fuel-related cost information for 2023 with the PSCW, which reflects an increase in annual retail electric rates of approximately $63 million in 2023 compared to WPL’s approved 2022 fuel-related costs. WPL currently expects a decision from the PSCW on its request by the end of 2022.


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•WPL currently expects to file a retail electric and gas rate review with the PSCW in the second quarter of 2023 for the 2024/2025 forward-looking Test Period. The key drivers for the anticipated filing include revenue requirement impacts of increasing electric and gas rate base, including investments in solar generation and battery storage. Any rate changes granted from this pending request are expected to be effective on January 1, 2024, with a decision from the PSCW expected by the end of 2023.

•IPL currently expects to file a retail electric and gas rate review with the IUB by the first half of 2024. The key drivers for the anticipated filing include revenue requirement impacts of increasing electric and gas rate base, including investments in solar generation and battery storage.

Legislative Matters:

•Refer to Note 8 9 for discussion of Iowa tax reform enacted in March 2022.

•In August 2022, the Inflation Reduction Act of 2022 was enacted. The most significant provisions of the new legislation for Alliant Energy, IPL and WPL relate to a 10-year extension of tax credits for clean energy projects, a new production tax credit eligible for solar projects, a new stand-alone investment tax credit for battery storage projects and the right to transfer future renewable credits to other corporate taxpayers. The new legislation also includes a requirement for corporations with income over $1 billion to pay a 15% minimum tax; however, Alliant Energy is currently below this income level. Alliant Energy, IPL and WPL currently expect to utilize various provisions of the new legislation to enhance the tax benefits expected from their announced approximately 1,500 MW of solar and 250 MW of battery storage projects, including transferring the future tax credits from such projects to other corporate taxpayers and opting to retain full ownership of such projects instead of financing a portion of the projects with tax equity partners. Compared to previous plans to utilize tax equity financing, the impact of these changes is expected to result in lower costs for IPL's and WPL's customers, higher rate base amounts, additional financing needs expected to be satisfied with additional long-term debt and common stock issuances, and improvements in long-term cash flows over the life of the solar and battery storage projects.

Financings and Common Stock Dividends:

•Refer to “Results of Operations” for discussion of expected future issuances of common stock and common stock dividends, and expected future issuances and retirements of long-term debt, by the end of 2023.

RESULTS OF OPERATIONS

Results of operations include financial information prepared in accordance with GAAP as well as utility electric margins and utility gas margins, which are not measures of financial performance under GAAP. Utility electric margins are defined as electric revenues less electric production fuel, purchased power and electric transmission service expenses. Utility gas margins are defined as gas revenues less cost of gas sold. Utility electric margins and utility gas margins are non-GAAP financial measures because they exclude other utility and non-utility revenues, other operation and maintenance expenses, depreciation and amortization expenses, and taxes other than income tax expense.

Management believes that utility electric and gas margins provide a meaningful basis for evaluating and managing utility operations since electric production fuel, purchased power and electric transmission service expenses and cost of gas sold are generally passed through to customers, and therefore, result in changes to electric and gas revenues that are comparable to changes in such expenses. The presentation of utility electric and gas margins herein is intended to provide supplemental information for investors regarding operating performance. These utility electric and gas margins may not be comparable to how other entities define utility electric and gas margin. Furthermore, these measures are not intended to replace operating income as determined in accordance with GAAP as an indicator of operating performance.


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~~Table of Contents~~

Additionally, the table below includes EPS for Utilities and Corporate Services, ATC Holdings, and Non-utility and Parent, which are non-GAAP financial measures. Alliant Energy believes these non-GAAP financial measures are useful to investors because they facilitate an understanding of segment performance and trends, and provide additional information about Alliant Energy’s operations on a basis consistent with the measures that management uses to manage its operations and evaluate its performance.

Financial Results Overview - Alliant Energy’s net income and EPS attributable to Alliant Energy common shareowners for the three months ended ~~March 31~~September 30 were as follows (dollars in millions, except per share amounts):


		2022		2021			2022		2021
		Income	EPS	Income (Loss)	EPS		Income (Loss)	EPS	Income (Loss)	EPS

Utilities and Corporate Services	Utilities and Corporate Services	$183	$0.73	$166	$0.66	Utilities and Corporate Services	$249	$0.99	$254	$1.01
ATC Holdings	ATC Holdings	8	0.03	8	0.03	ATC Holdings	5	0.02	8	0.03
Non-utility and Parent	Non-utility and Parent	1	0.01	(3)	(0.01)	Non-utility and Parent	(27)	(0.11)	(6)	(0.02)

Alliant Energy Consolidated	Alliant Energy Consolidated	$192	$0.77	$171	$0.68	Alliant Energy Consolidated	$227	$0.90	$256	$1.02

Alliant Energy’s Utilities and Corporate Services net income ~~increased~~decreased by ~~$17~~$5 million for the three-month period, primarily due to higher ~~AFUDC, higher earnings resulting from WPL’s increasing rate base, higher sales~~interest expense and the timing of income taxes.


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Alliant Energy’s Non-utility and Parent net income decreased by $21 million for the three-month period, primarily due to ~~favorable temperature impacts compared to 2021, as well as~~ higher ~~temperature-normalized sales.~~interest expense, the timing of income taxes and the impact of the Iowa corporate income tax rate change.

For the three and nine months ended ~~March 31,~~September 30, operating income and a reconciliation of utility electric and gas margins to the most directly comparable GAAP measure, operating income, was as follows (in millions):


		Alliant Energy		IPL		WPL			Alliant Energy		IPL		WPL
Three Months	Three Months	2022	2021	2022	2021	2022	2021	Three Months	2022	2021	2022	2021	2022	2021
Operating income	Operating income	$248	$198	$110	$103	$131	$90	Operating income	$309	$289	$171	$180	$131	$100
Electric utility revenues	Electric utility revenues	$773	$701	$400	$386	$373	$315	Electric utility revenues	$1,039	$939	$596	$555	$443	$384
Electric production fuel and purchased power expenses	Electric production fuel and purchased power expenses	(168)	(133)	(67)	(59)	(101)	(74)	Electric production fuel and purchased power expenses	(274)	(207)	(140)	(101)	(134)	(105)
Electric transmission service expense	Electric transmission service expense	(138)	(134)	(97)	(92)	(41)	(42)	Electric transmission service expense	(157)	(148)	(115)	(103)	(42)	(44)
Utility Electric Margin (non-GAAP)	Utility Electric Margin (non-GAAP)	467	434	236	235	231	199	Utility Electric Margin (non-GAAP)	608	584	341	351	267	235
Gas utility revenues	Gas utility revenues	262	170	139	91	123	79	Gas utility revenues	62	50	33	31	29	19
Cost of gas sold	Cost of gas sold	(168)	(100)	(85)	(50)	(83)	(50)	Cost of gas sold	(26)	(18)	(14)	(12)	(13)	(6)
Utility Gas Margin (non-GAAP)	Utility Gas Margin (non-GAAP)	94	70	54	41	40	29	Utility Gas Margin (non-GAAP)	36	32	19	19	16	13
Other utility revenues	Other utility revenues	11	13	11	12	—	1	Other utility revenues	11	13	11	13	—	—
Non-utility revenues	Non-utility revenues	22	17	—	—	—	—	Non-utility revenues	23	22	—	—	—	—
Other operation and maintenance expenses	Other operation and maintenance expenses	(153)	(146)	(83)	(77)	(58)	(59)	Other operation and maintenance expenses	(172)	(171)	(90)	(95)	(70)	(66)
Depreciation and amortization expenses	Depreciation and amortization expenses	(166)	(164)	(94)	(94)	(70)	(69)	Depreciation and amortization expenses	(169)	(165)	(95)	(94)	(71)	(70)
Taxes other than income tax expense	Taxes other than income tax expense	(27)	(26)	(14)	(14)	(12)	(11)	Taxes other than income tax expense	(28)	(26)	(15)	(14)	(11)	(12)
Operating income	Operating income	$248	$198	$110	$103	$131	$90	Operating income	$309	$289	$171	$180	$131	$100



	Alliant Energy		IPL		WPL
Nine Months	2022	2021	2022	2021	2022	2021
Operating income	$769	$663	$389	$394	$357	$245
Electric utility revenues	$2,624	$2,357	$1,438	$1,343	$1,186	$1,014
Electric production fuel and purchased power expenses	(633)	(478)	(290)	(215)	(343)	(263)
Electric transmission service expense	(428)	(403)	(303)	(274)	(125)	(128)
Utility Electric Margin (non-GAAP)	1,563	1,476	845	854	718	623
Gas utility revenues	418	289	224	165	194	124
Cost of gas sold	(242)	(149)	(126)	(84)	(117)	(65)
Utility Gas Margin (non-GAAP)	176	140	98	81	77	59
Other utility revenues	35	36	34	35	1	1
Non-utility revenues	70	60	—	—	—	—
Other operation and maintenance expenses	(492)	(477)	(260)	(253)	(193)	(194)
Depreciation and amortization expenses	(501)	(494)	(285)	(281)	(211)	(209)
Taxes other than income tax expense	(82)	(78)	(43)	(42)	(35)	(35)
Operating income	$769	$663	$389	$394	$357	$245

Operating Income Variances - Variances between periods in operating income for the three and nine months ended ~~March 31,~~September 30, 2022 compared to the same ~~period~~periods in 2021 were as follows (in millions):


				Three Months		Nine Months
		Alliant Energy	IPL		WPL			Alliant Energy	IPL	WPL	Alliant Energy	IPL	WPL
Total higher utility electric margin variance (Refer to details below)		$33	$1		$32
Total higher (lower) utility electric margin variance (Refer to details below)							Total higher (lower) utility electric margin variance (Refer to details below)	$24	($10)	$32	$87	($9)	$95
Total higher utility gas margin variance (Refer to details below)	Total higher utility gas margin variance (Refer to details below)	24	13		11		Total higher utility gas margin variance (Refer to details below)	4	—	3	36	17	18
Total (higher) lower other operation and maintenance expenses variance (Refer to details below)	Total (higher) lower other operation and maintenance expenses variance (Refer to details below)	(7)	(6)		1		Total (higher) lower other operation and maintenance expenses variance (Refer to details below)	(1)	5	(4)	(15)	(7)	1
Higher depreciation and amortization expense primarily due to additional plant in service in 2021 and 2022		(2)	—		(1)
Total higher depreciation and amortization expense							Total higher depreciation and amortization expense	(4)	(1)	(1)	(7)	(4)	(2)
Other	Other	2	(1)		(2)		Other	(3)	(3)	1	5	(2)	—
		$50	$7		$41			$20	($9)	$31	$106	($5)	$112


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Electric and Gas Revenues and Sales Summary - Electric and gas revenues (in millions), and MWh and Dth sales (in thousands), for the three and nine months ended ~~March 31~~September 30 were as follows:


Alliant Energy	Alliant Energy	Electric				Gas				Alliant Energy	Electric				Gas
		Revenues		MWhs Sold		Revenues		Dths Sold			Revenues		MWhs Sold		Revenues		Dths Sold
		2022	2021	2022	2021	2022	2021	2022	2021		2022	2021	2022	2021	2022	2021	2022	2021

Three Months										Three Months
Retail	Retail	$692	$636	6,388	6,272	$248	$157	26,095	23,431	Retail	$908	$845	6,788	7,031	$50	$40	3,584	3,264
Sales for resale	Sales for resale	68	45	1,945	1,071	N/A	N/A	N/A	N/A	Sales for resale	115	78	1,759	1,853	N/A	N/A	N/A	N/A
Transportation/Other	Transportation/Other	13	20	17	19	14	13	29,877	24,690	Transportation/Other	16	16	16	18	12	10	30,982	26,365
		$773	$701	8,350	7,362	$262	$170	55,972	48,121		$1,039	$939	8,563	8,902	$62	$50	34,566	29,629
Nine Months										Nine Months
Retail										Retail	$2,327	$2,124	19,304	19,262	$379	$258	37,284	33,299
Sales for resale										Sales for resale	251	181	5,161	4,411	N/A	N/A	N/A	N/A
Transportation/Other										Transportation/Other	46	52	46	53	39	31	83,241	74,111
											$2,624	$2,357	24,511	23,726	$418	$289	120,525	107,410


IPL	Electric				Gas
	Revenues		MWhs Sold		Revenues		Dths Sold
	2022	2021	2022	2021	2022	2021	2022	2021
Three Months
Retail	$559	$525	3,736	3,914	$25	$25	1,739	1,702
Sales for resale	28	21	581	487	N/A	N/A	N/A	N/A
Transportation/Other	9	9	9	9	8	6	9,743	9,308
	$596	$555	4,326	4,410	$33	$31	11,482	11,010
Nine Months
Retail	$1,358	$1,259	10,821	10,810	$199	$145	19,118	17,268
Sales for resale	53	49	1,600	1,160	N/A	N/A	N/A	N/A
Transportation/Other	27	35	25	26	25	20	31,917	29,727
	$1,438	$1,343	12,446	11,996	$224	$165	51,035	46,995


WPL	Electric				Gas
	Revenues		MWhs Sold		Revenues		Dths Sold
	2022	2021	2022	2021	2022	2021	2022	2021
Three Months
Retail	$349	$320	3,052	3,117	$25	$15	1,845	1,562
Sales for resale	87	57	1,178	1,366	N/A	N/A	N/A	N/A
Transportation/Other	7	7	7	9	4	4	21,239	17,057
	$443	$384	4,237	4,492	$29	$19	23,084	18,619
Nine Months
Retail	$969	$865	8,483	8,452	$180	$113	18,166	16,031
Sales for resale	198	132	3,561	3,251	N/A	N/A	N/A	N/A
Transportation/Other	19	17	21	27	14	11	51,324	44,384
	$1,186	$1,014	12,065	11,730	$194	$124	69,490	60,415

Sales Trends and Temperatures - Alliant Energy’s retail electric sales volumes decreased 3% and were unchanged for the three and nine months ended September 30, 2022 compared to the same periods in 2021, respectively, primarily due to changes in sales volumes of commercial and industrial customers due to standby service customers that can use other generation, as well as maintenance outages at certain large customers. Alliant Energy’s retail gas sales volumes increased 10% and 12% for the three and nine months ended September 30, 2022 compared to the same periods in 2021, respectively, primarily due to changes in temperatures and increases in the number of retail customers.


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IPL Electric Gas
Revenues MWhs Sold Revenues Dths Sold
2022 2021 2022 2021 2022 2021 2022 2021
Retail $379 $361 3,651 3,582 $130 $82 13,601 12,138
Sales for resale 13 11 597 287 N/A N/A N/A N/A
Transportation/Other 8 14 8 10 9 9 12,020 11,178
$400 $386 4,256 3,879 $139 $91 25,621 23,316

WPL Electric Gas
Revenues MWhs Sold Revenues Dths Sold
2022 2021 2022 2021 2022 2021 2022 2021
Retail $313 $275 2,737 2,690 $118 $75 12,494 11,293
Sales for resale 55 34 1,348 784 N/A N/A N/A N/A
Transportation/Other 5 6 9 9 5 4 17,857 13,512
$373 $315 4,094 3,483 $123 $79 30,351 24,805

~~Sales Trends and Temperatures~~ - Alliant Energy’s retail electric and gas sales volumes increased 2% and 11%, respectively, for the three months ended March 31, 2022 compared to the same period in 2021, primarily due to changes in temperatures, COVID-19 impacts in 2021 andEstimated increases ~~in the number of customers.~~

~~Estimated increases~~(decreases) to electric and gas margins from the impacts of temperatures for the three and nine months ended ~~March 31~~September 30 were as follows (in millions):


		Electric Margins			Gas Margins		Electric Margins							Gas Margins
						Three Months			Nine Months			Three Months			Nine Months
		2022	2021	Change				2022		2021	Change			2022	2021	Change	2022	2021	Change	2022	2021	Change	2022	2021	Change
IPL	IPL	$5	$2	$3				$3		$2	$1		IPL	$4	$5	($1)	$15	$16	($1)	$—	($1)	$1	$4	$1	$3
WPL	WPL	2	1	1				1		—	1		WPL	—	—	—	10	9	1	—	—	—	2	—	2
Total Alliant Energy	Total Alliant Energy	$7	$3	$4				$4		$2	$2		Total Alliant Energy	$4	$5	($1)	$25	$25	$—	$—	($1)	$1	$6	$1	$5

Electric Sales for Resale - Electric sales for resale volume changes were largely due to changes in sales in the wholesale energy markets operated by MISO. These changes are impacted by several factors, including the availability and dispatch of Alliant Energy’s EGUs and electricity demand within these wholesale energy markets. Changes in sales for resale revenues were largely offset by changes in fuel-related costs, and therefore, did not have a significant impact on electric margins.

Gas Transportation/Other - Gas transportation/other sales volume changes were largely due to changes in the gas volumes supplied to Alliant Energy’s natural gas-fired EGUs caused by the availability and dispatch of such EGUs. Changes in these transportation/other revenues did not have a significant impact on gas margins.

Utility Electric Margin Variances - The following items contributed to increased (decreased) utility electric margins for the three and nine months ended ~~March 31,~~September 30, 2022 compared to the same ~~period~~periods in 2021 as follows (in millions):

Alliant Energy IPL WPL
Higher revenue requirements at WPL due to increasing rate base (a) $26 $— $26
Higher revenues at IPL due to changes in credits on customers’ bills related to excess deferred income tax benefits amortization through the tax benefit rider (offset by changes in income tax) 6 6 —
Estimated changes in sales volumes caused by temperatures 4 3 1
Lower revenues at IPL due to changes in the renewable energy rider (offset by changes in income tax) (12) (12) —
Lower revenues at IPL related to changes in recovery amounts for energy efficiency costs through the energy efficiency rider (mostly offset by changes in energy efficiency expense) (2) (2) —
Other (includes higher temperature-normalized sales in 2022) 11 6 5
$33 $1 $32


	Three Months			Nine Months
	Alliant Energy	IPL	WPL	Alliant Energy	IPL	WPL
Higher revenue requirements at WPL due to increasing rate base (a)	$32	$—	$32	$85	$—	$85


Higher revenues at IPL due to changes in credits on customers’ bills related to excess deferred income tax benefits amortization through the tax benefit rider (offset by changes in income tax)	—	—	—	11	11	—

Lower revenues at IPL due to changes in the renewable energy rider (mostly offset by changes in income tax)	(4)	(4)	—	(23)	(23)	—



Other	(4)	(6)	—	14	3	10
	$24	($10)	$32	$87	($9)	$95

(a)In December 2021, the PSCW issued an order authorizing annual base rate increases of $114 million and $15 million for WPL’s retail electric and gas customers, respectively, covering the 2022/2023 forward-looking Test Period, which was based on a stipulated agreement between WPL and certain stakeholders. The key drivers for the annual base rate increases include higher retail fuel-related costs in 2022, lower excess deferred income tax benefits in 2022 and 2023 compared to 2021, and revenue requirement impacts of increasing electric and gas rate base, including investments in solar generation. Retail electric rate changes were effective on January 1, 2022 and extend through the end of 2023. Retail gas rate changes were effective on January 1, 2022 and extend through the end of 2022. The higher fuel expense costs are recognized in electric margin and the lower amount of excess deferred income tax benefits is recognized as a reduction in income tax.

Utility Gas Margin Variances - The following items contributed to increased (decreased) utility gas margins for the three and nine months ended September 30, 2022 compared to the same periods in 2021 as follows (in millions):


	Three Months			Nine Months
	Alliant Energy	IPL	WPL	Alliant Energy	IPL	WPL
Higher revenues at IPL related to changes in recovery amounts for energy efficiency costs through the energy efficiency rider (mostly offset by changes in energy efficiency expense)	$1	$1	$—	$12	$12	$—
Higher revenue requirements at WPL due to increasing rate base (refer to (a) above)	1	—	1	10	—	10

Other (includes higher sales in 2022)	2	(1)	2	14	5	8
	$4	$—	$3	$36	$17	$18


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~~Utility Gas Margin Variances~~ ~~- The following items contributed to increased utility gas margins for the three months ended March 31, 2022 compared to the same period in 2021 as follows (in millions):~~

Alliant Energy IPL WPL
Higher revenues at IPL related to changes in recovery amounts for energy efficiency costs through the energy efficiency rider (mostly offset by changes in energy efficiency expense) $9 $9 $—
Higher revenue requirements at WPL due to increasing rate base (refer to (a) above) 7 — 7
Estimated changes in sales volumes caused by temperatures 2 1 1
Other (includes higher temperature-normalized sales in 2022) 6 3 3
$24 $13 $11

Other Operation and Maintenance Expenses Variances - The following items contributed to (increased) decreased other operation and maintenance expenses for the three and nine months ended ~~March 31,~~September 30, 2022 compared to the same ~~period~~periods in 2021 as follows (in millions):


				Three Months		Nine Months
		Alliant Energy	IPL		WPL			Alliant Energy	IPL	WPL	Alliant Energy	IPL	WPL
Higher energy efficiency expense at IPL (mostly offset by higher revenues)							Higher energy efficiency expense at IPL (mostly offset by higher revenues)	$—	$—	$—	($8)	($8)	$—

Higher energy efficiency expense at IPL (primarily offset by higher revenues)		($9)	($9)		$—

Non-utility Travero (mostly offset by higher revenues)							Non-utility Travero (mostly offset by higher revenues)	(2)	—	—	(9)	—	—
Other	Other	2	3		1		Other	1	5	(4)	2	1	1
		($7)	($6)		$1			($1)	$5	($4)	($15)	($7)	$1

Other Income and Deductions Variances - The following items contributed to (increased) decreased other income and deductions for the three and nine months ended ~~March 31,~~September 30, 2022 compared to the same ~~period~~periods in 2021 as follows (in millions):


				Three Months		Nine Months
		Alliant Energy	IPL		WPL			Alliant Energy	IPL	WPL	Alliant Energy	IPL	WPL
Higher interest expense primarily due to financings completed in 2021		($5)	($2)		($1)
Higher interest expense primarily due to financings completed in 2022 and 2021 and higher interest rates							Higher interest expense primarily due to financings completed in 2022 and 2021 and higher interest rates	($15)	($3)	($6)	($29)	($8)	($9)
(Lower) higher equity income from unconsolidated investments, net (refer to Note 5 for details)							(Lower) higher equity income from unconsolidated investments, net (refer to Note 5 for details)	(8)	—	—	(10)	—	1
Higher AFUDC primarily due to changes in construction work in progress balances related to WPL’s solar generation	Higher AFUDC primarily due to changes in construction work in progress balances related to WPL’s solar generation	7	1		7		Higher AFUDC primarily due to changes in construction work in progress balances related to WPL’s solar generation	3	1	2	18	1	17
Other	Other	2	—		1		Other	3	1	2	7	4	2
		$4	($1)		$7			($17)	($1)	($2)	($14)	($3)	$11

Income Taxes - Refer to Note 8 9 for details of effective income tax rates.

Preferred Dividend Requirements of IPL - Alliant Energy’s and IPL’s preferred dividend requirements decreased for the three and nine months ended ~~March 31,~~September 30, 2022 compared to the same ~~period~~periods in 2021 a due to the redemption of IPL’s 5.1% cumulative preferred stock in December 2021.

Other Future Considerations - In addition to items discussed in this report, the following key items could impact Alliant Energy’s, IPL’s and WPL’s future financial condition or results of operations:

•Financing Plans - Alliant Energy currently expects to issue up to $250 million of common stock in 2023 through one or more offerings and its Shareowner Direct Plan. IPL, WPL (subject to regulatory approval) and AEF currently expect to issue up to $300 million, $300 million, and $450 million of long-term debt, respectively, by the end of 2023. WPL and AEF have $250 million and $400 million of long-term debt maturing in 2022 and 2023, respectively.

•Common Stock Dividends - Alliant Energy announced a 6% increase in its targeted 2023 annual common stock dividend to $1.81 per share, which is equivalent to a quarterly rate of $0.4525 per share, beginning with the February 2023 dividend payment. The timing and amount of future dividends is subject to an approved dividend declaration from Alliant Energy’s Board of Directors, and is dependent upon earnings expectations, capital requirements, and general financial business conditions, among other factors.

•Higher Earnings on Increasing Rate Base - Alliant Energy and WPL currently expect an increase in earnings in 2023 compared to 2022 due to impacts from increasing revenue requirements related to investments in the utility business, including WPL’s solar investments.

•Other Operation and Maintenance Expenses - Alliant Energy, IPL and WPL currently expect a decrease in other operation and maintenance expenses in 2023 compared to 2022 largely due to cost reductions resulting from operating efficiencies.

•Interest Expense - Alliant Energy, IPL and WPL currently expect an increase in interest expense in 2023 compared to 2022 due to financings completed in 2022 and planned by the end of 2023 as discussed above, as well as expected higher interest rates.

LIQUIDITY AND CAPITAL RESOURCES

The liquidity and capital resources summary included in the 2021 Form 10-K has not changed materially, except as described below.

Liquidity Position - At ~~March 31,~~September 30, 2022, Alliant Energy had ~~$67~~$344 million of cash and cash equivalents, ~~$724~~$617 million ($~~331~~67 million at the parent company, $250 million at IPL and ~~$143~~$300 million at WPL) of available capacity under the single revolving credit facility and $109 million of available capacity at IPL under its sales of accounts receivable program.


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Capital Structure - Capital structures at ~~March 31,~~September 30, 2022 were as follows (Long-term Debt (including current maturities) (LD); Short-term Debt (SD); Common Equity (CE)):


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Cash Flows - Selected information from the cash flows statements was as follows (in millions):


		Alliant Energy		IPL		WPL			Alliant Energy		IPL		WPL
		2022	2021	2022	2021	2022	2021		2022	2021	2022	2021	2022	2021
Cash, cash equivalents and restricted cash, January 1	Cash, cash equivalents and restricted cash, January 1	$40	$56	$34	$50	$2	$3	Cash, cash equivalents and restricted cash, January 1	$40	$56	$34	$50	$2	$3
Cash flows from (used for):	Cash flows from (used for):							Cash flows from (used for):
Operating activities	Operating activities	251	145	89	(45)	167	148	Operating activities	485	477	166	95	279	349
Investing activities	Investing activities	(223)	(38)	18	98	(217)	(119)	Investing activities	(599)	(452)	84	122	(612)	(510)
Financing activities	Financing activities	3	(145)	(79)	(92)	52	(30)	Financing activities	421	(57)	(239)	(254)	630	162
Net increase (decrease)	Net increase (decrease)	31	(38)	28	(39)	2	(1)	Net increase (decrease)	307	(32)	11	(37)	297	1
Cash, cash equivalents and restricted cash, March 31		$71	$18	$62	$11	$4	$2
Cash, cash equivalents and restricted cash, September 30								Cash, cash equivalents and restricted cash, September 30	$347	$24	$45	$13	$299	$4

Operating Activities - The following items contributed to increased (decreased) operating activity cash flows for the ~~three~~nine months ended ~~March 31,~~September 30, 2022 compared to the same period in 2021 (in millions):


		Alliant Energy	IPL	WPL		Alliant Energy	IPL	WPL
Higher collections from WPL’s increasing base rate		$33	$—	$33
Higher collections from WPL’s retail electric and gas base rate increases					Higher collections from WPL’s retail electric and gas base rate increases	$95	$—	$95
Lower contributions to qualified defined benefit pension plans					Lower contributions to qualified defined benefit pension plans	37	17	18
Natural gas cost payments from extreme temperatures in February 2021 resulting in under-recovered natural gas costs at IPL in 2021	Natural gas cost payments from extreme temperatures in February 2021 resulting in under-recovered natural gas costs at IPL in 2021	20	20	—	Natural gas cost payments from extreme temperatures in February 2021 resulting in under-recovered natural gas costs at IPL in 2021	15	15	—
Increased collections from IPL’s and WPL’s retail customers caused by temperature impacts on electric and gas sales		6	4	2
Credits issued to IPL’s retail electric customers in 2021 through its transmission cost rider for refunds received in 2020 for MISO transmission owner return on equity complaints					Credits issued to IPL’s retail electric customers in 2021 through its transmission cost rider for refunds received in 2020 for MISO transmission owner return on equity complaints	14	14	—

Timing of WPL’s fuel-related cost recoveries from customers					Timing of WPL’s fuel-related cost recoveries from customers	(71)	—	(71)

Changes in levels of gas stored underground and prepaid gas costs					Changes in levels of gas stored underground and prepaid gas costs	(35)	(13)	(22)
Changes in interest payments	Changes in interest payments	(3)	—	(2)	Changes in interest payments	(23)	(5)	(6)

Changes in income taxes paid/refunded	Changes in income taxes paid/refunded	—	(7)	—	Changes in income taxes paid/refunded	(6)	5	(27)

Timing of intercompany payments and receipts		—	60	16

Other (primarily due to other changes in working capital)	Other (primarily due to other changes in working capital)	50	57	(30)	Other (primarily due to other changes in working capital)	(18)	38	(57)
		$106	$134	$19		$8	$71	($70)

As discussed in “2022 Highlights,” the Inflation Reduction Act of 2022 provides the right to transfer future renewable tax credits to other corporate taxpayers, which is expected to result in future cash flows from operating activities for Alliant Energy, IPL and WPL.

Investing Activities - The following items contributed to increased (decreased) investing activity cash flows for the ~~three~~nine months ended ~~March 31,~~September 30, 2022 compared to the same period in 2021 (in millions):


		Alliant Energy	IPL	WPL		Alliant Energy	IPL	WPL
(Higher) lower utility construction and acquisition expenditures (a)					(Higher) lower utility construction and acquisition expenditures (a)	($101)	$16	($117)
Changes in the amount of cash receipts on sold receivables	Changes in the amount of cash receipts on sold receivables	($94)	($94)	$—	Changes in the amount of cash receipts on sold receivables	(65)	(65)	—
(Higher) lower utility construction and acquisition expenditures (a)		(93)	10	(104)
Other	Other	2	4	6	Other	19	11	15
		($185)	($80)	($98)		($147)	($38)	($102)

(a)Largely due to higher expenditures for WPL’s solar generation, partially offset by lower expenditures for IPL’s and WPL’s electric and gas distribution systems.


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Construction and Acquisition Expenditures - Construction and acquisition expenditures and financing plans are reviewed, approved and updated as part of the strategic planning process. Changes may result from a number of reasons, including regulatory requirements, changing legislation, not obtaining favorable and acceptable regulatory approval on certain projects, improvements in technology, and improvements to ensure reliability of the electric and gas distribution systems. Construction and acquisition expenditures for 2022 through 2026 are currently anticipated as follows (in millions), which are focused on the transition to cleaner energy and strengthening the resiliency and reliability of IPL’s and WPL’s electric grid. Cost estimates represent Alliant Energy’s, IPL’s and WPL’s portion of construction expenditures and exclude AFUDC and capitalized interest, if applicable.


	Alliant Energy					IPL					WPL
	2022	2023	2024	2025	2026	2022	2023	2024	2025	2026	2022	2023	2024	2025	2026
Generation:
Renewables and battery storage	$775	$900	$1,205	$725	$1,060	$40	$325	$625	$260	$670	$735	$575	$580	$465	$390
Other	80	100	315	490	335	40	55	55	70	100	40	45	260	420	235
Distribution:
Electric systems	465	550	595	545	535	250	320	360	300	280	215	230	235	245	255
Gas systems	75	80	85	85	85	35	35	40	40	40	40	45	45	45	45
Other	145	220	210	175	180	25	45	40	45	45	20	35	30	30	30
	$1,540	$1,850	$2,410	$2,020	$2,195	$390	$780	$1,120	$715	$1,135	$1,050	$930	$1,150	$1,205	$955

New MISO Seasonal Capacity Construct - As discussed in “2022 Highlights,” in August 2022, FERC approved MISO’s proposal to change its methodology for procuring capacity in the energy market effective with the 2023/2024 MISO Planning Year. IPL and WPL currently plan to construct and/or acquire additional renewable, battery and natural gas resources to comply with the requirements of this new methodology and have reflected the estimated capital expenditures for these projects in the "Renewables and battery storage" and "Other” Generation lines in the construction and acquisition table above.

Renewables and Battery Storage - Alliant Energy, IPL and WPL ~~are currently evaluating~~continue to evaluate potential impacts from cost pressures prevalent in the solar generation and battery storage markets ~~as well as~~and the pending U.S. Department of Commerce investigation ~~discussed in “2022 Highlights~~,” on the timing and estimated costs for IPL’s and WPL’s planned development and acquisition of additional renewable energy, which could impact their anticipated future construction and acquisition expenditures. Refer to “2022 Highlights” for further discussion of the U.S. Department of Commerce investigation and regulatory filings with the IUB and PSCW related to future renewable and battery storage projects, including recent filings by IPL and WPL announcing plans to shift away from tax equity partnerships to traditional ownership for future renewable and battery storage projects following the enactment of the Inflation Reduction Act of 2022.

Financing Activities - The following items contributed to increased (decreased) financing activity cash flows for the ~~three~~nine months ended ~~March 31,~~September 30, 2022 compared to the same period in 2021 (in millions):


		Alliant Energy	IPL	WPL		Alliant Energy	IPL	WPL
Higher net proceeds from issuance of long-term debt	Higher net proceeds from issuance of long-term debt	$650	$—	$—	Higher net proceeds from issuance of long-term debt	$938	$—	$288

Capital contributions from noncontrolling interest					Capital contributions from noncontrolling interest	29	—	29
Higher payments to retire long-term debt	Higher payments to retire long-term debt	(300)	—	—	Higher payments to retire long-term debt	(375)	—	—
Net changes in the amount of commercial paper outstanding	Net changes in the amount of commercial paper outstanding	(186)	—	30	Net changes in the amount of commercial paper outstanding	(59)	—	18
Distributions to noncontrolling interest					Distributions to noncontrolling interest	(29)	—	(29)
(Higher) lower common stock dividends	(Higher) lower common stock dividends	(5)	20	(2)	(Higher) lower common stock dividends	(18)	61	(7)
Higher capital contributions from WPL’s parent company, Alliant Energy		—	—	55
Higher (lower) capital contributions from IPL’s and WPL’s parent company, Alliant Energy					Higher (lower) capital contributions from IPL’s and WPL’s parent company, Alliant Energy	—	(50)	175
Other	Other	(11)	(7)	(1)	Other	(8)	4	(6)
		$148	$13	$82		$478	$15	$468

IPL and WPL Solar Project Tax Equity Financing - Alliant Energy, IPL and WPL are currently evaluating potential impacts from cost pressures prevalent in the solar generation and battery storage markets, as well as the U.S. Department of Commerce investigationAs discussed inNote 1 (c) and “2022 Highlights,” onwith the ~~timing~~August 2022 enactment of the Inflation Reduction Act of 2022, IPL and ~~estimated~~WPL currently expect to retain full ownership of their planned solar generation projects instead of financing a portion of the construction costs ~~for IPL’s and WPL’s planned development and acquisition of additional renewable energy, which could result in changes to their proposed solar project~~with capital from tax equity ~~financing.~~partners.

Common Stock Issuances and Common Stock Dividends - Refer to Note 5 6 for discussion of common stock issuances by Alliant Energy in 2022. Refer to “


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~~Table~~Results of ~~Contents~~Operations

” for discussion of expected issuances of common stock and common stock dividends in 2023.

Long-term Debt - Refer to Note 67 (b) for discussion of AEF’s and WPL’s issuance of long-term debt and Corporate Services’ retirement of long-term debt in 2022. AEF’s current term loan credit agreement that expires in March 2024 includes an option to increase the amount outstanding up to $400 million in aggregate with the same maturity, subject to bank approval, and includes substantially the same financial covenants that are included in Alliant Energy’s credit facility agreement. Refer to “Results of Operations” for discussion of expected future issuances and retirements of long-term debt by the end of 2023.


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Impact of Credit Ratings on Liquidity and Collateral Obligations -

Ratings Triggers - In June 2022, Standard & Poor’s Ratings Services changed WPL’s outlook from stable to negative. This outlook change is not expected to have a material impact on Alliant Energy and WPL’s liquidity or collateral obligations.

Off-Balance Sheet Arrangements and Certain Financial Commitments - A summary of Alliant Energy’s and IPL’s off-balance sheet arrangements and Alliant Energy’s, IPL’s and WPL’s contractual obligations is included in the 2021 Form 10-K and has not changed materially from the items reported in the 2021 Form 10-K, except for the items described in Notes 34, 67 and 1 23.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Quantitative and Qualitative Disclosures About Market Risk are reported in the 2021 Form 10-K and have not changed materially.

ITEM 4. CONTROLS AND PROCEDURES

Alliant Energy’s, IPL’s and WPL’s management evaluated, with the participation of each of Alliant Energy’s, IPL’s and WPL’s Chief Executive Officer, Chief Financial Officer and Disclosure Committee, the effectiveness of the design and operation of Alliant Energy’s, IPL’s and WPL’s disclosure controls and procedures (as defined in Rule 13a-15(e) of the Securities Exchange Act of ~~1934)~~1934, as amended) as of ~~March 31,~~September 30, 2022 pursuant to the requirements of the Securities Exchange Act of 1934, as amended. Based on their evaluation, the Chief Executive Officer and the Chief Financial Officer concluded that Alliant Energy’s, IPL’s and WPL’s disclosure controls and procedures were effective as of the quarter ended ~~March 31,~~September 30, 2022.

There was no change in Alliant Energy’s, IPL’s and WPL’s internal control over financial reporting that occurred during the quarter ended ~~March 31,~~September 30, 2022 that has materially affected, or is reasonably likely to materially affect, Alliant Energy’s, IPL’s or WPL’s internal control over financial reporting.

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

None. SEC regulations require Alliant Energy, IPL and WPL to disclose information about certain proceedings arising under federal, state or local environmental provisions when a governmental authority is a party to the proceedings and such proceedings involve potential monetary sanctions that Alliant Energy, IPL and WPL reasonably believe will exceed a specified threshold. Pursuant to the SEC regulations, Alliant Energy, IPL and WPL use a threshold of $1 million for purposes of determining whether disclosure of any such proceedings is required. Applying this threshold, there are no environmental matters to disclose for this period.

ITEM 1A. RISK FACTORS

The risk factors described in Item 1A in the 2021 Form 10-K have not changed materially.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

A summary of Alliant Energy common stock repurchases for the quarter ended ~~March 31,~~September 30, 2022 was as follows:

Total Number Average Price Total Number of Shares Maximum Number (or Approximate
of Shares Paid Per Purchased as Part of Dollar Value) of Shares That May
Period Purchased (a) Share Publicly Announced Plan Yet Be Purchased Under the Plan (a)
January 1 through January 31 4,227 $60.98 — N/A
February 1 through February 28 2,918 56.38 — N/A
March 1 through March 31 594 60.58 — N/A
7,739 59.22 —

Total Number

Average Price

Total Number of Shares

Maximum Number (or Approximate

of Shares

Paid Per

Purchased as Part of

Dollar Value) of Shares That May

Period

Purchased (a)

Publicly Announced Plan

Yet Be Purchased Under the Plan (a)

July 1 through July 31

4,429

$57.92

—

N/A

August 1 through August 31

2,668

63.83

—

N/A

September 1 through September 30

58.18

—

N/A

7,158

60.12

—

(a)All shares were purchased on the open market and held in a rabbi trust under the Alliant Energy Deferred Compensation Plan. There is no limit on the number of shares of Alliant Energy common stock that may be held under the Deferred Compensation Plan, which currently does not have an expiration date.

ITEM 5. OTHER INFORMATION

On November 4, 2022, the Board of Directors of Alliant Energy Corporation (the “Company”) approved an amendment and restatement of the Amended and Restated Bylaws of the Company, effective November 8, 2022. The amendments update Section 3.14 related to notice of shareowner business and nomination of directors by conforming the bylaw provision to


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universal proxy rules promulgated by the SEC, requiring additional information be provided by shareowners utilizing the bylaw provision, and amending the deadline to submit proposals or nominees under the bylaws to not later than the close of business on the 90th day nor earlier than the close of business on the 120th day prior to the first anniversary of the preceding year’s annual meeting except in certain circumstances. The amendments also include certain technical and clarifying changes to the bylaws.

The foregoing summary is qualified in its entirety by reference to the copy of the Amended and Restated Bylaws of Alliant Energy filed as Exhibit 3.1 to this Quarterly Report on Form 10-Q and is incorporated by reference herein. A blackline of the Amended and Restated Bylaws against the prior version of the bylaws is filed herewith as Exhibit 3.2.

ITEM 6. EXHIBITS

The following Exhibits are filed herewith or incorporated herein by reference.


Exhibit Number			Description
3.1			Amended and Restated Bylaws of Alliant Energy, effective November 8 , 2022
3.2			Amended and Restated Bylaws of Alliant Energy, effective November 8 , 2022 (marked to show changes against prior version)
4.1			~~Indenture,~~Officers’ Certificate, dated as of ~~February 28,~~August 15, 2022, ~~among AEF, Alliant Energy, as guarantor, and The Bank of New York Mellon Trust Company, National Association, as trustee~~creating WPL’s 3.950% Debentures due September 1, 2032 (incorporated by reference to Exhibit 4.1 to ~~Alliant Energy’s~~WPL’s Form 8-K, filed ~~March 1,~~August 15, 2022 (File No. ~~1-9894))~~
~~10.1~~			Term Loan Credit Agreement, dated as of March 3, 2022, among AEF, Alliant Energy, U.S. Bank National Association and the lender parties set forth therein (incorporated by reference to Exhibit 10.1 to Alliant Energy’s Form 8-K, filed March 4, 2022 (File No. 1-9894)0-337))
31.1			Certification of the Chief Executive Officer for Alliant Energy
31.2			Certification of the Chief Financial Officer for Alliant Energy
31.3			Certification of the Chief Executive Officer for IPL
31.4			Certification of the Chief Financial Officer for IPL
31.5			Certification of the Chief Executive Officer for WPL
31.6			Certification of the Chief Financial Officer for WPL
32.1			Written Statement of the Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C.§1350 for Alliant Energy
32.2			Written Statement of the Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C.§1350 for IPL
32.3			Written Statement of the Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C.§1350 for WPL
101.INS			Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.SCH			Inline XBRL Taxonomy Extension Schema Document
101.CAL			Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB			Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE			Inline XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF			Inline XBRL Taxonomy Extension Definition Linkbase Document
104			Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, Alliant Energy Corporation, Interstate Power and Light Company and Wisconsin Power and Light Company have each duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized on the ~~29th~~8th day of ~~April~~November 2022.


ALLIANT ENERGY CORPORATION
Registrant

By: /s/ Benjamin M. Bilitz			Chief Accounting Officer and Controller
Benjamin M. Bilitz			(Principal Accounting Officer and Authorized Signatory)


INTERSTATE POWER AND LIGHT COMPANY
Registrant

By: /s/ Benjamin M. Bilitz			Chief Accounting Officer and Controller
Benjamin M. Bilitz			(Principal Accounting Officer and Authorized Signatory)


WISCONSIN POWER AND LIGHT COMPANY
Registrant

By: /s/ Benjamin M. Bilitz			Chief Accounting Officer and Controller
Benjamin M. Bilitz			(Principal Accounting Officer and Authorized Signatory)


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