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, 2021

☐ 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

Interstate Power and Light Company, 5.100% Series D Cumulative Perpetual Preferred Stock, $0.01 Par Value, Trading Symbol IPLDP, 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, 2021:

Alliant Energy Corporation, Common Stock, $0.01 par value, ~~250,134,552~~250,360,787 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			12

3. Receivables			13
4. Investments			13
5. Common Equity			1314
~~6. Debt~~6 . Preferred Stock			15

~~7. Revenues~~			1516
~~8. Income Taxes~~7.			15
~~9. Benefit Plans~~Debt			16

18. 0 ~~. Derivative Instruments~~Revenues			17
19. 1Income Taxes			17
10 . ~~Fair Value Measurements~~Benefit Plans			18
111. 2 ~~. Commitments and Contingencies~~Asset Retirement Obligations			19
112.3 Derivative Instruments			19
13. ~~. Segments of Business~~Fair Value Measurements			20
114. 4Commitments and Contingencies			22
15. .Segments of Business			23
16. Related Parties			2124

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations			2125
Item 3. Quantitative and Qualitative Disclosures About Market Risk			2734
Item 4. Controls and Procedures			2734
Part II. Other Information			2734
Item 1. Legal Proceedings			2734
Item 1A. Risk Factors			2734
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds			2734
Item 6. Exhibits			2835
Signatures			2835

Table of Contents

DEFINITIONS

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


Abbreviation or Acronym	Definition	Abbreviation or Acronym	Definition
2020 Form 10-K	Combined Annual Report on Form 10-K filed by Alliant Energy, IPL and WPL for the year ended Dec. 31, 2020	GAAP	U.S. generally accepted accounting principles
AEF	Alliant Energy Finance, LLC	IPL	Interstate Power and Light Company
~~Alliant Energy~~AFUDC	~~Alliant Energy Corporation~~Allowance for funds used during construction	IUB	Iowa Utilities Board
~~ATC~~Alliant Energy	~~American Transmission Company LLC~~Alliant Energy Corporation	MDA	Management’s Discussion and Analysis of Financial Condition and Results of Operations
ATC	American Transmission Company LLC	MISO	Midcontinent Independent System Operator, Inc.
ATC Holdings	Interest in American Transmission Company LLC and ATC Holdco LLC	~~MISO~~MW	~~Midcontinent Independent System Operator, Inc.~~Megawatt
Corporate Services	Alliant Energy Corporate Services, Inc.	MWMWh	~~Megawatt~~Megawatt-hour
COVID-19	Novel coronavirus	~~MWh~~	~~Megawatt-hour~~
~~DAEC~~	~~Duane Arnold Energy Center~~	N/A	Not applicable
~~Dth~~DAEC	~~Dekatherm~~Duane Arnold Energy Center	Note(s)	Combined Notes to Condensed Consolidated Financial Statements
Dth	Dekatherm	OPEB	Other postretirement benefits
EGU	Electric generating unit	~~OPEB~~PPA	~~Other postretirement benefits~~Purchased power agreement
EPA	U.S. Environmental Protection Agency	~~PPA~~PSCW	~~Purchased power agreement~~Public Service Commission of Wisconsin
EPS	Earnings per weighted average common share	~~PSCW~~SEC	~~Public Service~~Securities and Exchange Commission ~~of Wisconsin~~
Federal Tax Reform	Tax Cuts and Jobs Act	U.S.	United States of America
FERC	Federal Energy Regulatory Commission	West Riverside	West Riverside Energy Center
Financial Statements	Condensed Consolidated Financial Statements	Whiting Petroleum	Whiting Petroleum Corporation
FTR	Financial transmission right	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 the COVID-19 pandemic, including vaccine mandates and testing requirements, on sales volumes, margins, operations, employees, 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;

•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;

•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 tax rates, including minimum tax rates, and adjustments made to deferred tax assets and liabilities;~~


			1

Table of Contents

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

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

•any material post-closing 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;

•weather effects on results of utility operations;

•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;

•the ability to complete construction of solar generation projects within the cost targets set by regulators due to cost increases of materials, equipment and commodities including due to tariffs, labor issues or supply shortages, the ability to achieve the expected level of tax benefits based on tax guidelines and project costs, and the ability to efficiently utilize the solar generation project tax benefits for the benefit of customers;

•disruptions to the supply of materials, equipment and commodities needed to construct solar generation projects, including due to shortages, labor issues or transportation issues, which may impact the ability to meet capacity requirements and result in increased capacity expense;

•changes in the price of delivered natural gas, transmission, purchased electricity and coal due to shifts in supply and demand caused by market conditions and regulations;

•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, 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 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;

•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 valuations and 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 2020 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,
		2021	2020				2021	2020	2021	2020
		(in millions, except per share amounts)		(in millions, except per share amounts)
Revenues:	Revenues:					Revenues:
Electric utility	Electric utility	$701	$730			Electric utility	$939	$852	$2,357	$2,257
Gas utility	Gas utility	170	152			Gas utility	50	42	289	253
Other utility	Other utility	13	12			Other utility	13	10	36	32
Non-utility	Non-utility	17	22			Non-utility	22	16	60	57
Total revenues	Total revenues	901	916			Total revenues	1,024	920	2,742	2,599
Operating expenses:	Operating expenses:					Operating expenses:
Electric production fuel and purchased power	Electric production fuel and purchased power	133	184			Electric production fuel and purchased power	207	179	478	527
Electric transmission service	Electric transmission service	134	122			Electric transmission service	148	132	403	326
Cost of gas sold	Cost of gas sold	100	85			Cost of gas sold	18	11	149	117
Other operation and maintenance	Other operation and maintenance	146	163			Other operation and maintenance	171	143	477	465
Depreciation and amortization	Depreciation and amortization	164	146			Depreciation and amortization	165	156	494	454
Taxes other than income taxes	Taxes other than income taxes	26	28			Taxes other than income taxes	26	27	78	82
Total operating expenses	Total operating expenses	703	728			Total operating expenses	735	648	2,079	1,971
Operating income	Operating income	198	188			Operating income	289	272	663	628
Other (income) and deductions:	Other (income) and deductions:					Other (income) and deductions:
Interest expense	Interest expense	69	69			Interest expense	68	68	206	207
Equity income from unconsolidated investments, net	Equity income from unconsolidated investments, net	(15)	(13)			Equity income from unconsolidated investments, net	(13)	(15)	(47)	(46)
Allowance for funds used during construction	Allowance for funds used during construction	(4)	(23)			Allowance for funds used during construction	(7)	(13)	(16)	(51)
Other	Other	2	1			Other	3	3	7	7
Total other (income) and deductions	Total other (income) and deductions	52	34			Total other (income) and deductions	51	43	150	117
Income before income taxes	Income before income taxes	146	154			Income before income taxes	238	229	513	511
Income tax benefit	Income tax benefit	(28)	(19)			Income tax benefit	(21)	(20)	(66)	(47)

Net income	Net income	174	173			Net income	259	249	579	558
Preferred dividend requirements of Interstate Power and Light Company	Preferred dividend requirements of Interstate Power and Light Company	3	3			Preferred dividend requirements of Interstate Power and Light Company	3	3	8	8
Net income attributable to Alliant Energy common shareowners	Net income attributable to Alliant Energy common shareowners	$171	$170			Net income attributable to Alliant Energy common shareowners	$256	$246	$571	$550
Weighted average number of common shares outstanding:	Weighted average number of common shares outstanding:					Weighted average number of common shares outstanding:
Basic	Basic	250.0	244.4			Basic	250.3	249.7	250.2	247.9
Diluted	Diluted	250.4	244.6			Diluted	250.8	250.0	250.6	248.1

Earnings per weighted average common share attributable to Alliant Energy common shareowners (basic and diluted)		$0.68	$0.70
Earnings per weighted average common share attributable to Alliant Energy common shareowners:						Earnings per weighted average common share attributable to Alliant Energy common shareowners:
Basic						Basic	$1.02	$0.99	$2.28	$2.22
Diluted						Diluted	$1.02	$0.98	$2.28	$2.22

Refer to accompanying Combined Notes to Condensed Consolidated Financial Statements.


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ALLIANT ENERGY CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)


		March 31, 2021	December 31, 2020		September 30, 2021	December 31, 2020
		(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	$14	$54	Cash and cash equivalents	$20	$54
Accounts receivable, less allowance for expected credit losses	Accounts receivable, less allowance for expected credit losses	325	412	Accounts receivable, less allowance for expected credit losses	392	412

Production fuel, at weighted average cost	Production fuel, at weighted average cost	57	66	Production fuel, at weighted average cost	42	66
Gas stored underground, at weighted average cost	Gas stored underground, at weighted average cost	25	46	Gas stored underground, at weighted average cost	58	46
Materials and supplies, at weighted average cost	Materials and supplies, at weighted average cost	122	105	Materials and supplies, at weighted average cost	118	105
Regulatory assets	Regulatory assets	95	81	Regulatory assets	111	81

Other	Other	117	123	Other	274	123
Total current assets	Total current assets	755	887	Total current assets	1,015	887
Property, plant and equipment, net	Property, plant and equipment, net	14,353	14,336	Property, plant and equipment, net	14,738	14,336
Investments:	Investments:			Investments:
ATC Holdings	ATC Holdings	334	331	ATC Holdings	338	331
Other	Other	160	154	Other	176	154
Total investments	Total investments	494	485	Total investments	514	485
Other assets:	Other assets:			Other assets:
Regulatory assets	Regulatory assets	1,912	1,929	Regulatory assets	1,907	1,929
Deferred charges and other	Deferred charges and other	80	73	Deferred charges and other	155	73
Total other assets	Total other assets	1,992	2,002	Total other assets	2,062	2,002
Total assets	Total assets	$17,594	$17,710	Total assets	$18,329	$17,710


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	$308	$8	Current maturities of long-term debt	$383	$8
Commercial paper	Commercial paper	336	389	Commercial paper	316	389

Accounts payable	Accounts payable	307	377	Accounts payable	361	377

Regulatory liabilities	Regulatory liabilities	208	249	Regulatory liabilities	231	249
Other	Other	249	274	Other	266	274
Total current liabilities	Total current liabilities	1,408	1,297	Total current liabilities	1,557	1,297
Long-term debt, net (excluding current portion)	Long-term debt, net (excluding current portion)	6,471	6,769	Long-term debt, net (excluding current portion)	6,692	6,769
Other liabilities:	Other liabilities:			Other liabilities:
Deferred tax liabilities	Deferred tax liabilities	1,843	1,814	Deferred tax liabilities	1,906	1,814
Regulatory liabilities	Regulatory liabilities	1,047	1,057	Regulatory liabilities	1,130	1,057
Pension and other benefit obligations	Pension and other benefit obligations	495	511	Pension and other benefit obligations	452	511
Other	Other	364	374	Other	407	374
Total other liabilities	Total other liabilities	3,749	3,756	Total other liabilities	3,895	3,756
Commitments and contingencies (Note 1 2)		0	0
Commitments and contingencies (N ot e 14)				Commitments and contingencies (N ot e 14)	0	0
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; 250,134,552 and 249,868,415 shares		3	2
Common stock - $0.01 par value - 480,000,000 shares authorized; 250,360,787 and 249,868,415 shares				Common stock - $0.01 par value - 480,000,000 shares authorized; 250,360,787 and 249,868,415 shares	3	2
Additional paid-in capital	Additional paid-in capital	2,712	2,704	Additional paid-in capital	2,733	2,704
Retained earnings	Retained earnings	3,063	2,994	Retained earnings	3,261	2,994
Accumulated other comprehensive loss	Accumulated other comprehensive loss	(1)	(1)	Accumulated other comprehensive loss	(1)	(1)
Shares in deferred compensation trust - 365,523 and 380,542 shares at a weighted average cost of $29.17 and $28.73 per share		(11)	(11)
Shares in deferred compensation trust - 377,875 and 380,542 shares at a weighted average cost of $30.14 and $28.73 per share				Shares in deferred compensation trust - 377,875 and 380,542 shares at a weighted average cost of $30.14 and $28.73 per share	(11)	(11)
Total Alliant Energy Corporation common equity	Total Alliant Energy Corporation common equity	5,766	5,688	Total Alliant Energy Corporation common equity	5,985	5,688
Cumulative preferred stock of Interstate Power and Light Company	Cumulative preferred stock of Interstate Power and Light Company	200	200	Cumulative preferred stock of Interstate Power and Light Company	200	200
Total equity	Total equity	5,966	5,888	Total equity	6,185	5,888
Total liabilities and equity	Total liabilities and equity	$17,594	$17,710	Total liabilities and equity	$18,329	$17,710

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,
		2021	2020		2021	2020
		(in millions)			(in millions)
Cash flows from operating activities:	Cash flows from operating activities:			Cash flows from operating activities:
Net income	Net income	$174	$173	Net income	$579	$558
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	164	146	Depreciation and amortization	494	454
Deferred tax benefit and tax credits	Deferred tax benefit and tax credits	(29)	(23)	Deferred tax benefit and tax credits	(69)	(48)

Other	Other	4	5	Other	7	(17)
Other changes in assets and liabilities:	Other changes in assets and liabilities:			Other changes in assets and liabilities:
Accounts receivable	Accounts receivable	(126)	(119)	Accounts receivable	(397)	(316)
Derivative assets				Derivative assets	(202)	(22)

Regulatory liabilities	Regulatory liabilities	(60)	(38)	Regulatory liabilities	25	(72)
Deferred income taxes	Deferred income taxes	58	50	Deferred income taxes	160	143
Pension and other benefit obligations	Pension and other benefit obligations	(16)	(31)	Pension and other benefit obligations	(59)	(61)

DAEC PPA amendment buyout payment				DAEC PPA amendment buyout payment	—	(110)
Other	Other	(24)	(3)	Other	(61)	(73)
Net cash flows from operating activities	Net cash flows from operating activities	145	160	Net cash flows from operating activities	477	436
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	(214)	(278)	Utility business	(772)	(935)
Other	Other	(17)	(11)	Other	(60)	(39)
Cash receipts on sold receivables	Cash receipts on sold receivables	209	123	Cash receipts on sold receivables	423	318
Other	Other	(16)	(13)	Other	(43)	(23)
Net cash flows used for investing activities	Net cash flows used for investing activities	(38)	(179)	Net cash flows used for investing activities	(452)	(679)
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	(102)	(93)	Common stock dividends	(304)	(281)
Proceeds from issuance of common stock, net	Proceeds from issuance of common stock, net	8	228	Proceeds from issuance of common stock, net	22	241
Proceeds from issuance of long-term debt	Proceeds from issuance of long-term debt	0	300	Proceeds from issuance of long-term debt	300	1,050
Payments to retire long-term debt	Payments to retire long-term debt	0	(300)	Payments to retire long-term debt	(4)	(654)
Net change in commercial paper and other short-term borrowings		(53)	(67)
Net change in commercial paper				Net change in commercial paper	(73)	85
Other	Other	2	(8)	Other	2	(22)
Net cash flows from (used for) financing activities	Net cash flows from (used for) financing activities	(145)	60	Net cash flows from (used for) financing activities	(57)	419
Net increase (decrease) in cash, cash equivalents and restricted cash	Net increase (decrease) in cash, cash equivalents and restricted cash	(38)	41	Net increase (decrease) in cash, cash equivalents and restricted cash	(32)	176
Cash, cash equivalents and restricted cash at beginning of period	Cash, cash equivalents and restricted cash at beginning of period	56	18	Cash, cash equivalents and restricted cash at beginning of period	56	18
Cash, cash equivalents and restricted cash at end of period	Cash, cash equivalents and restricted cash at end of period	$18	$59	Cash, cash equivalents and restricted cash at end of period	$24	$194
Supplemental cash flows information:	Supplemental cash flows information:			Supplemental cash flows information:
Cash paid during the period for:
Cash (paid) refunded during the period for:				Cash (paid) refunded during the period for:
Interest	Interest	($59)	($65)	Interest	($197)	($197)

Income taxes, net				Income taxes, net	($1)	$6
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	$64	$156	Accrued capital expenditures	$91	$202
Beneficial interest obtained in exchange for securitized accounts receivable	Beneficial interest obtained in exchange for securitized accounts receivable	$107	$188	Beneficial interest obtained in exchange for securitized accounts receivable	$164	$201

Refer to accompanying Combined Notes to Condensed Consolidated Financial Statements.


			5

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,
		2021	2020				2021	2020	2021	2020
		(in millions)		(in millions)
Revenues:	Revenues:					Revenues:
Electric utility	Electric utility	$386	$425			Electric utility	$555	$519	$1,343	$1,332
Gas utility	Gas utility	91	83			Gas utility	31	24	165	141
Steam and other	Steam and other	12	11			Steam and other	13	10	35	31
Total revenues	Total revenues	489	519			Total revenues	599	553	1,543	1,504
Operating expenses:	Operating expenses:					Operating expenses:
Electric production fuel and purchased power	Electric production fuel and purchased power	59	106			Electric production fuel and purchased power	101	102	215	304
Electric transmission service	Electric transmission service	92	84			Electric transmission service	103	93	274	212
Cost of gas sold	Cost of gas sold	50	44			Cost of gas sold	12	6	84	63
Other operation and maintenance	Other operation and maintenance	77	87			Other operation and maintenance	95	85	253	269
Depreciation and amortization	Depreciation and amortization	94	86			Depreciation and amortization	94	89	281	264
Taxes other than income taxes	Taxes other than income taxes	14	15			Taxes other than income taxes	14	16	42	45
Total operating expenses	Total operating expenses	386	422			Total operating expenses	419	391	1,149	1,157
Operating income	Operating income	103	97			Operating income	180	162	394	347
Other (income) and deductions:	Other (income) and deductions:					Other (income) and deductions:
Interest expense	Interest expense	35	34			Interest expense	34	35	103	104
Allowance for funds used during construction	Allowance for funds used during construction	(2)	(10)			Allowance for funds used during construction	(2)	(6)	(7)	(21)
Other	Other	0	1			Other	—	1	2	3
Total other (income) and deductions	Total other (income) and deductions	33	25			Total other (income) and deductions	32	30	98	86
Income before income taxes	Income before income taxes	70	72			Income before income taxes	148	132	296	261
Income tax benefit	Income tax benefit	(12)	(14)			Income tax benefit	(12)	(19)	(34)	(37)
Net income	Net income	82	86			Net income	160	151	330	298
Preferred dividend requirements	Preferred dividend requirements	3	3			Preferred dividend requirements	3	3	8	8
Net income available for common stock	Net income available for common stock	$79	$83			Net income available for common stock	$157	$148	$322	$290

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, 2021	December 31, 2020		September 30, 2021	December 31, 2020
		(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	$11	$50	Cash and cash equivalents	$13	$50
Accounts receivable, less allowance for expected credit losses	Accounts receivable, less allowance for expected credit losses	130	210	Accounts receivable, less allowance for expected credit losses	205	210

Production fuel, at weighted average cost	Production fuel, at weighted average cost	45	48	Production fuel, at weighted average cost	32	48
Gas stored underground, at weighted average cost	Gas stored underground, at weighted average cost	8	20	Gas stored underground, at weighted average cost	33	20
Materials and supplies, at weighted average cost	Materials and supplies, at weighted average cost	73	63	Materials and supplies, at weighted average cost	71	63
Regulatory assets	Regulatory assets	73	52	Regulatory assets	86	52
Other	Other	53	53	Other	108	53
Total current assets	Total current assets	393	496	Total current assets	548	496
Property, plant and equipment, net	Property, plant and equipment, net	7,872	7,889	Property, plant and equipment, net	7,931	7,889
Other assets:	Other assets:			Other assets:
Regulatory assets	Regulatory assets	1,421	1,431	Regulatory assets	1,421	1,431
Deferred charges and other	Deferred charges and other	40	33	Deferred charges and other	78	33
Total other assets	Total other assets	1,461	1,464	Total other assets	1,499	1,464
Total assets	Total assets	$9,726	$9,849	Total assets	$9,978	$9,849


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

Accounts payable	Accounts payable	$119	$162	Accounts payable	$140	$162
Accounts payable to associated companies		0	45

Regulatory liabilities	Regulatory liabilities	87	103	Regulatory liabilities	104	103

Other	Other	131	137	Other	171	182
Total current liabilities	Total current liabilities	337	447	Total current liabilities	415	447
Long-term debt, net	Long-term debt, net	3,346	3,345	Long-term debt, net	3,347	3,345
Other liabilities:	Other liabilities:			Other liabilities:
Deferred tax liabilities	Deferred tax liabilities	1,047	1,035	Deferred tax liabilities	1,079	1,035
Regulatory liabilities	Regulatory liabilities	574	573	Regulatory liabilities	616	573
Pension and other benefit obligations	Pension and other benefit obligations	180	186	Pension and other benefit obligations	161	186
Other	Other	300	299	Other	325	299
Total other liabilities	Total other liabilities	2,101	2,093	Total other liabilities	2,181	2,093
Commitments and contingencies (Note 12)		0	0
Commitments and contingencies (Note 14)				Commitments and contingencies (Note 14)	0	0
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	2,752	2,752	Additional paid-in capital	2,802	2,752
Retained earnings	Retained earnings	957	979	Retained earnings	1,000	979
Total Interstate Power and Light Company common equity	Total Interstate Power and Light Company common equity	3,742	3,764	Total Interstate Power and Light Company common equity	3,835	3,764
Cumulative preferred stock	Cumulative preferred stock	200	200	Cumulative preferred stock	200	200
Total equity	Total equity	3,942	3,964	Total equity	4,035	3,964
Total liabilities and equity	Total liabilities and equity	$9,726	$9,849	Total liabilities and equity	$9,978	$9,849

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,
		2021	2020		2021	2020
		(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	$82	$86	Net income	$330	$298
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	86	Depreciation and amortization	281	264

Deferred tax benefit and tax credits				Deferred tax benefit and tax credits	(13)	(42)
Other	Other	(3)	(15)	Other	(1)	(9)
Other changes in assets and liabilities:	Other changes in assets and liabilities:			Other changes in assets and liabilities:
Accounts receivable	Accounts receivable	(133)	(126)	Accounts receivable	(412)	(337)
Derivative assets				Derivative assets	(86)	(12)

Regulatory assets	Regulatory assets	(16)	(9)	Regulatory assets	(33)	(32)

Regulatory liabilities	Regulatory liabilities	(19)	1	Regulatory liabilities	30	(11)

Deferred income taxes	Deferred income taxes	14	15	Deferred income taxes	56	62

Pension and other benefit obligations				Pension and other benefit obligations	(25)	(19)
DAEC PPA amendment buyout payment				DAEC PPA amendment buyout payment	—	(110)
Other	Other	(64)	(13)	Other	(32)	(33)
Net cash flows from (used for) operating activities		(45)	25
Net cash flows from operating activities				Net cash flows from operating activities	95	19
Cash flows from (used for) investing activities:	Cash flows from (used for) investing activities:			Cash flows from (used for) investing activities:
Construction and acquisition expenditures	Construction and acquisition expenditures	(106)	(165)	Construction and acquisition expenditures	(285)	(465)
Cash receipts on sold receivables	Cash receipts on sold receivables	209	123	Cash receipts on sold receivables	423	318
Other	Other	(5)	(11)	Other	(16)	(55)
Net cash flows from (used for) investing activities	Net cash flows from (used for) investing activities	98	(53)	Net cash flows from (used for) investing activities	122	(202)
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	(101)	(60)	Common stock dividends	(301)	(177)
Capital contributions from parent	Capital contributions from parent	0	100	Capital contributions from parent	50	345

Proceeds from issuance of long-term debt				Proceeds from issuance of long-term debt	—	400
Payments to retire long-term debt				Payments to retire long-term debt	—	(200)

Other	Other	9	4	Other	(3)	(9)
Net cash flows from (used for) financing activities	Net cash flows from (used for) financing activities	(92)	44	Net cash flows from (used for) financing activities	(254)	359
Net increase (decrease) in cash, cash equivalents and restricted cash	Net increase (decrease) in cash, cash equivalents and restricted cash	(39)	16	Net increase (decrease) in cash, cash equivalents and restricted cash	(37)	176
Cash, cash equivalents and restricted cash at beginning of period	Cash, cash equivalents and restricted cash at beginning of period	50	9	Cash, cash equivalents and restricted cash at beginning of period	50	9
Cash, cash equivalents and restricted cash at end of period	Cash, cash equivalents and restricted cash at end of period	$11	$25	Cash, cash equivalents and restricted cash at end of period	$13	$185
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)	($41)	Interest	($106)	($109)
Income taxes, net	Income taxes, net	$7	$0	Income taxes, net	$28	($12)
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	$31	$92	Accrued capital expenditures	$30	$150
Beneficial interest obtained in exchange for securitized accounts receivable	Beneficial interest obtained in exchange for securitized accounts receivable	$107	$188	Beneficial interest obtained in exchange for securitized accounts receivable	$164	$201

Refer to accompanying Combined Notes to Condensed Consolidated Financial Statements.


			8

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,
		2021	2020				2021	2020	2021	2020
		(in millions)		(in millions)
Revenues:	Revenues:					Revenues:
Electric utility	Electric utility	$315	$305			Electric utility	$384	$333	$1,014	$925
Gas utility	Gas utility	79	69			Gas utility	19	18	124	112
Other	Other	1	1			Other	—	—	1	1
Total revenues	Total revenues	395	375			Total revenues	403	351	1,139	1,038
Operating expenses:	Operating expenses:					Operating expenses:
Electric production fuel and purchased power	Electric production fuel and purchased power	74	78			Electric production fuel and purchased power	105	78	263	223
Electric transmission service	Electric transmission service	42	38			Electric transmission service	44	39	128	114
Cost of gas sold	Cost of gas sold	50	41			Cost of gas sold	6	4	65	53
Other operation and maintenance	Other operation and maintenance	59	54			Other operation and maintenance	66	65	194	172
Depreciation and amortization	Depreciation and amortization	69	59			Depreciation and amortization	70	65	209	186
Taxes other than income taxes	Taxes other than income taxes	11	11			Taxes other than income taxes	12	11	35	35
Total operating expenses	Total operating expenses	305	281			Total operating expenses	303	262	894	783
Operating income	Operating income	90	94			Operating income	100	89	245	255
Other (income) and deductions:	Other (income) and deductions:					Other (income) and deductions:
Interest expense	Interest expense	26	25			Interest expense	25	26	77	78

Allowance for funds used during construction	Allowance for funds used during construction	(2)	(13)			Allowance for funds used during construction	(5)	(6)	(9)	(29)
Other	Other	1	0			Other	2	1	3	3
Total other (income) and deductions	Total other (income) and deductions	25	12			Total other (income) and deductions	22	21	71	52
Income before income taxes	Income before income taxes	65	82			Income before income taxes	78	68	174	203
Income tax benefit	Income tax benefit	(19)	(8)			Income tax benefit	(15)	(5)	(41)	(17)
Net income	Net income	$84	$90			Net income	$93	$73	$215	$220

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.


			9

Table of Contents

WISCONSIN POWER AND LIGHT COMPANY

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)

March 31,
2021 December 31,
2020
(in millions, except per
share and share amounts)
ASSETS
Current assets:
Cash and cash equivalents $2 $3
Accounts receivable, less allowance for expected credit losses 183 192
Production fuel, at weighted average cost 12 18
Gas stored underground, at weighted average cost 17 26
Materials and supplies, at weighted average cost 47 40
Regulatory assets 22 29
Other 47 54
Total current assets 330 362
Property, plant and equipment, net 6,053 6,022
Other assets:
Regulatory assets 491 498
Deferred charges and other 36 30
Total other assets 527 528
Total assets $6,910 $6,912
LIABILITIES AND EQUITY
Current liabilities:
Commercial paper $148 $257
Accounts payable 125 154
Accounts payable to associated companies 17 35
Regulatory liabilities 121 146
Other 94 82
Total current liabilities 505 674
Long-term debt, net 2,131 2,130
Other liabilities:
Deferred tax liabilities 719 702
Regulatory liabilities 473 484
Finance lease obligations - Sheboygan Falls Energy Facility 39 42
Pension and other benefit obligations 215 222
Other 183 180
Total other liabilities 1,629 1,630
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 1,584 1,459
Retained earnings 995 953
Total Wisconsin Power and Light Company common equity 2,645 2,478
Total liabilities and equity $6,910 $6,912


	September 30, 2021	December 31, 2020
	(in millions, except per share and share amounts)
ASSETS
Current assets:
Cash and cash equivalents	$4	$3
Accounts receivable, less allowance for expected credit losses	175	192

Production fuel, at weighted average cost	10	18
Gas stored underground, at weighted average cost	25	26
Materials and supplies, at weighted average cost	45	40
Regulatory assets	25	29
Prepaid gross receipts tax	29	42
Other	99	12
Total current assets	412	362
Property, plant and equipment, net	6,367	6,022
Other assets:
Regulatory assets	486	498
Deferred charges and other	76	30
Total other assets	562	528
Total assets	$7,341	$6,912


LIABILITIES AND EQUITY
Current liabilities:

Commercial paper	$3	$257

Accounts payable	160	154

Regulatory liabilities	127	146
Other	116	117
Total current liabilities	406	674
Long-term debt, net	2,429	2,130
Other liabilities:
Deferred tax liabilities	747	702
Regulatory liabilities	514	484
Finance lease obligations - Sheboygan Falls Energy Facility	34	42
Pension and other benefit obligations	193	222
Other	206	180
Total other liabilities	1,694	1,630
Commitments and contingencies (Note 14)	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	1,704	1,459
Retained earnings	1,042	953
Total Wisconsin Power and Light Company common equity	2,812	2,478


Total liabilities and equity	$7,341	$6,912

Refer to accompanying Combined Notes to Condensed Consolidated Financial Statements.


			10

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,
		2021	2020		2021	2020
		(in millions)			(in millions)
Cash flows from operating activities:	Cash flows from operating activities:			Cash flows from operating activities:
Net income	Net income	$84	$90	Net income	$215	$220
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	69	59	Depreciation and amortization	209	186
Deferred tax benefit and tax credits	Deferred tax benefit and tax credits	(28)	(11)	Deferred tax benefit and tax credits	(63)	(9)
Other	Other	4	(5)	Other	12	(8)
Other changes in assets and liabilities:	Other changes in assets and liabilities:			Other changes in assets and liabilities:

Derivative assets				Derivative assets	(116)	(10)

Regulatory liabilities	Regulatory liabilities	(41)	(39)	Regulatory liabilities	(5)	(61)

Deferred income taxes	Deferred income taxes	44	32	Deferred income taxes	108	79
Other	Other	16	22	Other	(11)	5
Net cash flows from operating activities	Net cash flows from operating activities	148	148	Net cash flows from operating activities	349	402
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	(108)	(113)	Construction and acquisition expenditures	(487)	(470)
Other	Other	(11)	(11)	Other	(23)	5
Net cash flows used for investing activities	Net cash flows used for investing activities	(119)	(124)	Net cash flows used for investing activities	(510)	(465)
Cash flows used for financing activities:
Cash flows from financing activities:				Cash flows from financing activities:
Common stock dividends	Common stock dividends	(42)	(43)	Common stock dividends	(126)	(127)
Capital contributions from parent	Capital contributions from parent	125	25	Capital contributions from parent	245	25

Net change in commercial paper and other short-term borrowings		(109)	14
Proceeds from issuance of long-term debt				Proceeds from issuance of long-term debt	300	350
Payments to retire long-term debt				Payments to retire long-term debt	—	(150)
Net change in commercial paper				Net change in commercial paper	(254)	(29)
Other	Other	(4)	(1)	Other	(3)	(8)
Net cash flows used for financing activities		(30)	(5)
Net cash flows from financing activities				Net cash flows from financing activities	162	61
Net increase (decrease) in cash, cash equivalents and restricted cash	Net increase (decrease) in cash, cash equivalents and restricted cash	(1)	19	Net increase (decrease) in cash, cash equivalents and restricted cash	1	(2)
Cash, cash equivalents and restricted cash at beginning of period	Cash, cash equivalents and restricted cash at beginning of period	3	4	Cash, cash equivalents and restricted cash at beginning of period	3	4
Cash, cash equivalents and restricted cash at end of period	Cash, cash equivalents and restricted cash at end of period	$2	$23	Cash, cash equivalents and restricted cash at end of period	$4	$2
Supplemental cash flows information:	Supplemental cash flows information:			Supplemental cash flows information:
Cash paid during the period for:
Cash (paid) refunded during the period for:				Cash (paid) refunded during the period for:
Interest	Interest	($21)	($21)	Interest	($72)	($71)

Income taxes, net				Income taxes, net	($24)	$5
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	$32	$62	Accrued capital expenditures	$59	$50

Refer to accompanying Combined Notes to Condensed Consolidated Financial Statements.


			11

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 ~~Securities and Exchange Commission.~~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 ~~latest combined Annual Report on~~2020 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, 2021 are not necessarily indicative of results that may be expected for the year ending December 31, 2021.

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) Asset Impairments -

Property, Plant and Equipment of Regulated Operations - In the second quarter of 2021, WPL received approval from MISO to retire Columbia Units 1 and 2, which had a net book value of approximately $470 million in aggregate as of September 30, 2021, and currently anticipates retiring Columbia Unit 1 by the end of 2023 and Columbia Unit 2 by the end of 2024. Alliant Energy and WPL concluded that Columbia Units 1 and 2 met the criteria to be considered probable of abandonment as of September 30, 2021. WPL is currently allowed a full recovery of and a full return on these EGUs from both its retail and wholesale customers, and as a result, Alliant Energy and WPL concluded that no disallowance was required as of September 30, 2021.

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, 2021	December 31, 2020	March 31, 2021	December 31, 2020	March 31, 2021	December 31, 2020		September 30, 2021	December 31, 2020	September 30, 2021	December 31, 2020	September 30, 2021	December 31, 2020
Tax-related	Tax-related	$901	$890	$853	$843	$48	$47	Tax-related	$931	$890	$881	$843	$50	$47
Pension and OPEB costs	Pension and OPEB costs	570	580	286	291	284	289	Pension and OPEB costs	549	580	276	291	273	289
Asset retirement obligations	Asset retirement obligations	120	119	82	81	38	38	Asset retirement obligations	124	119	85	81	39	38
Assets retired early	Assets retired early	108	113	74	77	34	36	Assets retired early	98	113	69	77	29	36
IPL’s DAEC PPA amendment	IPL’s DAEC PPA amendment	108	110	108	110	—	—	IPL’s DAEC PPA amendment	96	110	96	110	—	—
WPL’s Western Wisconsin gas distribution expansion investments	WPL’s Western Wisconsin gas distribution expansion investments	55	55	—	—	55	55	WPL’s Western Wisconsin gas distribution expansion investments	53	55	—	—	53	55
Commodity cost recovery								Commodity cost recovery	32	4	17	1	15	3
Derivatives	Derivatives	13	26	6	13	7	13	Derivatives	4	26	4	13	—	13

Other	Other	132	117	85	68	47	49	Other	131	113	79	67	52	46
		$2,007	$2,010	$1,494	$1,483	$513	$527		$2,018	$2,010	$1,507	$1,483	$511	$527

~~Other~~Commodity cost recovery - In February 2021, portions of the central and southern U.S., including Alliant Energy’s service territories, experienced a prolonged period of very cold temperatures and a series of winter storms. These events created significant volatility and increases in commodity prices caused by higher demand for electricity and natural gas and disruptions in commodity supply, resulting in IPL under-recovering its natural gas costs. In March 2021, IPL received approval from the IUB to spread recovery of these higher natural gas costs from its retail customers through December 2021. As of ~~March 31,~~September 30, 2021, IPL’s cumulative under-collection of ~~these~~ natural gas costs was ~~$20 million, which is included in “Other” regulatory assets in the above table.~~$15 million. The extreme temperatures in February 2021 did not impact WPL’s natural gas costs and IPL’s and WPL’s fuel-related costs to the extent of IPL’s natural gas costs.

~~Regulatory liabilities were comprised~~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 ~~following items (in millions):~~

Alliant Energy IPL WPL
March 31,
2021 December 31,
2020 March 31,
2021 December 31,
2020 March 31,
2021 December 31,
2020
Tax-related $685 $732 $327 $331 $358 $401
Cost of removal obligations 371 367 242 238 129 129
Electric transmission cost recovery 67 68 40 39 27 29
WPL’s West Riverside liquidated damages 38 38 — — 38 38
Derivatives 26 28 18 25 8 3
Other 68 73 34 43 34 30
$1,255 $1,306 $661 $676 $594 $630

PSCW during each retail electric rate proceeding or in a separate fuel cost plan approval proceeding. In 2021, WPL’s actual fuel-related costs fell outside these fuel monitoring ranges, resulting in a $12 million deferral as of September 30, 2021.


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


	Alliant Energy		IPL		WPL
	September 30, 2021	December 31, 2020	September 30, 2021	December 31, 2020	September 30, 2021	December 31, 2020
Tax-related	$611	$732	$313	$331	$298	$401
Cost of removal obligations	383	367	252	238	131	129
Derivatives	221	28	104	25	117	3
Electric transmission cost recovery	53	68	29	39	24	29
WPL’s West Riverside liquidated damages	40	38	—	—	40	38



Other	53	73	22	43	31	30
	$1,361	$1,306	$720	$676	$641	$630

Tax-related - Alliant Energy’s, IPL’s and WPL’s tax-related regulatory liabilities are primarily related to excess deferred tax benefits resulting from the remeasurement of accumulated deferred income taxes caused by Federal Tax Reform. During the ~~three~~nine months ended ~~March 31,~~September 30, 2021, Alliant Energy’s, IPL’s and WPL’s tax-related regulatory liabilities decreased primarily due to returning a portion of these excess deferred tax benefits back to customers.

NOTE 3. 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. In April 2021, IPL amended and extended through March 2023 the purchase commitment from the third party to which it sells its receivables. Effective April 2021, the limit on cash proceeds is $110 million. As of ~~March 31,~~September 30, 2021, IPL had ~~$15~~$60 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):


				Three Months		Nine Months
		2021	2020			2021	2020	2021	2020
Maximum outstanding aggregate cash proceeds	Maximum outstanding aggregate cash proceeds	$100	$96		Maximum outstanding aggregate cash proceeds	$110	$1	$110	$96
Average outstanding aggregate cash proceeds	Average outstanding aggregate cash proceeds	30	24		Average outstanding aggregate cash proceeds	65	1	52	12

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


		March 31, 2021	December 31, 2020		September 30, 2021	December 31, 2020
Customer accounts receivable	Customer accounts receivable	$124	$114	Customer accounts receivable	$145	$114
Unbilled utility revenues	Unbilled utility revenues	74	92	Unbilled utility revenues	83	92

Receivables sold to third party	Receivables sold to third party	198	206	Receivables sold to third party	228	206
Less: cash proceeds	Less: cash proceeds	75	1	Less: cash proceeds	50	1
Deferred proceeds	Deferred proceeds	123	205	Deferred proceeds	178	205
Less: allowance for expected credit losses	Less: allowance for expected credit losses	16	17	Less: allowance for expected credit losses	14	17
Fair value of deferred proceeds	Fair value of deferred proceeds	$107	$188	Fair value of deferred proceeds	$164	$188

As of ~~March 31,~~September 30, 2021, outstanding receivables past due under the Receivables Agreement were ~~$22~~$19 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):

2021 2020
Collections $529 $541
Write-offs, net of recoveries 2 2

In April 2021, IPL amended and extended through March 2023 the purchase commitment from the third party to which it sells its receivables. Effective April 2021, the limit on cash proceeds is $110 million.


	Three Months		Nine Months
	2021	2020	2021	2020
Collections	$607	$561	$1,589	$1,555
Write-offs, net of recoveries	4	1	7	4

NOTE 4. 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
		2021	2020			2021	2020	2021	2020
ATC Holdings	ATC Holdings	($11)	($11)		ATC Holdings	($12)	($11)	($34)	($36)

Other	Other	(4)	(2)		Other	(1)	(4)	(13)	(10)
		($15)	($13)			($13)	($15)	($47)	($46)


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NOTE 5. COMMON EQUITY

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


Shares outstanding, January 1, 2021			249,868,415


Shareowner Direct Plan			~~152,588~~378,823
Equity-based compensation plans			113,549

Shares outstanding, ~~March 31,~~September 30, 2021			~~250,134,552~~250,360,787


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

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 Income (Loss) Trust of IPL Equity
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 0 1
Ending balance, March 31, 2021 $3 $2,712 $3,063 ($1) ($11) $200 $5,966
Three Months Ended March 31, 2020
Beginning balance, December 31, 2019 $2 $2,446 $2,766 $1 ($10) $200 $5,405
Net income attributable to Alliant Energy common shareowners 170 170
Common stock dividends ($0.38 per share) (93) (93)
Equity forward settlements and Shareowner Direct Plan issuances 0 228 228
Adoption of new accounting standard, net of tax (9) (9)
Other comprehensive income, net of tax 1 1
Ending balance, March 31, 2020 $2 $2,674 $2,834 $2 ($10) $200 $5,702


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	Income (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
Three Months Ended September 30, 2020
Beginning balance, June 30, 2020	$2	$2,683	$2,874	($1)	($10)	$200	$5,748
Net income attributable to Alliant Energy common shareowners			246				246
Common stock dividends ($0.38 per share)			(94)				(94)
Shareowner Direct Plan issuances		6					6
Equity-based compensation plans and other		4			(1)		3


Ending balance, September 30, 2020	$2	$2,693	$3,026	($1)	($11)	$200	$5,909

IPL Total IPL Common Equity
Additional Cumulative
Common Paid-In Retained Preferred Total
Stock Capital Earnings Stock Equity
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
Three Months Ended March 31, 2020
Beginning balance, December 31, 2019 $33 $2,348 $891 $200 $3,472
Net income available for common stock 83 83
Common stock dividends (60) (60)
Capital contributions from parent 100 100
Ending balance, March 31, 2020 $33 $2,448 $914 $200 $3,595

WPL Additional Total
Common Paid-In Retained Common
Stock Capital Earnings Equity
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
Three Months Ended March 31, 2020
Beginning balance, December 31, 2019 $66 $1,434 $864 $2,364
Net income 90 90
Common stock dividends (43) (43)
Capital contributions from parent 25 25
Ending balance, March 31, 2020 $66 $1,459 $911 $2,436



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	Income (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
Nine Months Ended September 30, 2020
Beginning balance, December 31, 2019	$2	$2,446	$2,766	$1	($10)	$200	$5,405
Net income attributable to Alliant Energy common shareowners			550				550
Common stock dividends ($1.14 per share)			(281)				(281)
Equity forward settlements and Shareowner Direct Plan issuances		241					241
Equity-based compensation plans and other		6			(1)		5
Adoption of new accounting standard, net of tax			(9)				(9)
Other comprehensive loss, net of tax				(2)			(2)
Ending balance, September 30, 2020	$2	$2,693	$3,026	($1)	($11)	$200	$5,909


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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, 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
Three Months Ended September 30, 2020
Beginning balance, June 30, 2020	$33	$2,523	$915	$200	$3,671
Net income available for common stock			148		148
Common stock dividends			(59)		(59)
Capital contributions from parent		170			170
Ending balance, September 30, 2020	$33	$2,693	$1,004	$200	$3,930



IPL	Total IPL Common Equity
		Additional		Cumulative
	Common	Paid-In	Retained	Preferred	Total
	Stock	Capital	Earnings	Stock	Equity
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
Nine Months Ended September 30, 2020
Beginning balance, December 31, 2019	$33	$2,348	$891	$200	$3,472
Net income available for common stock			290		290
Common stock dividends			(177)		(177)
Capital contributions from parent		345			345
Ending balance, September 30, 2020	$33	$2,693	$1,004	$200	$3,930


WPL		Additional		Total
	Common	Paid-In	Retained	Common
	Stock	Capital	Earnings	Equity
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
Three Months Ended September 30, 2020
Beginning balance, June 30, 2020	$66	$1,459	$927	$2,452
Net income			73	73
Common stock dividends			(43)	(43)

Ending balance, September 30, 2020	$66	$1,459	$957	$2,482


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WPL		Additional		Total
	Common	Paid-In	Retained	Common
	Stock	Capital	Earnings	Equity
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
Nine Months Ended September 30, 2020
Beginning balance, December 31, 2019	$66	$1,434	$864	$2,364
Net income			220	220
Common stock dividends			(127)	(127)
Capital contributions from parent		25		25
Ending balance, September 30, 2020	$66	$1,459	$957	$2,482

NOTE 6. PREFERRED STOCK

In November 2021, IPL announced it will redeem all 8,000,000 outstanding shares of its 5.1% cumulative preferred stock in December 2021 at par value for approximately $200 million plus accrued and unpaid dividends up to the redemption date.

NOTE 7. DEBT

NOTE 7(a) Short-term Debt - In the third quarter of 2021, Alliant Energy, IPL and WPL reallocated credit facility capacity amounts to $500 million for Alliant Energy at the parent company level, $100 million for IPL and $400 million for WPL, within the $1 billion total commitment. Information regarding Alliant Energy’s, IPL’s and WPL’s commercial paper, and Alliant Energy’s and WPL’s borrowings under the single credit facility, which currently expires in August 2023, classified as short-term debt was as follows (dollars in millions):


March 31, 2021		Alliant Energy	IPL	WPL
September 30, 2021					September 30, 2021	Alliant Energy	IPL	WPL
Amount outstanding	Amount outstanding	$336	$0	$148	Amount outstanding	$316	$—	$3
Weighted average interest rates	Weighted average interest rates	0.2%	N/A	0.1%	Weighted average interest rates	0.2%	N/A	0.1%
Available credit facility capacity	Available credit facility capacity	$664	$250	$152	Available credit facility capacity	$684	$100	$397


		Alliant Energy		IPL		WPL			Alliant Energy		IPL		WPL
Three Months Ended March 31		2021	2020	2021	2020	2021	2020
Three Months Ended September 30								Three Months Ended September 30	2021	2020	2021	2020	2021	2020
Maximum amount outstanding (based on daily outstanding balances)	Maximum amount outstanding (based on daily outstanding balances)	$578	$463	$0	$1	$275	$212	Maximum amount outstanding (based on daily outstanding balances)	$648	$422	$8	$—	$320	$139
Average amount outstanding (based on daily outstanding balances)	Average amount outstanding (based on daily outstanding balances)	$424	$382	$0	$0	$189	$167	Average amount outstanding (based on daily outstanding balances)	$560	$252	$—	$—	$221	$83
Weighted average interest rates	Weighted average interest rates	0.2%	1.8%	0%	1.8%	0.2%	1.8%	Weighted average interest rates	0.2%	0.2%	0.2%	N/A	0.1%	0.2%

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)	$648	$463	$19	$8	$320	$212
Average amount outstanding (based on daily outstanding balances)								Average amount outstanding (based on daily outstanding balances)	$479	$252	$—	$—	$196	$86
Weighted average interest rates								Weighted average interest rates	0.2%	1.1%	0.2%	0.5%	0.1%	1.2%

NOTE 7(b) Long-term Debt - In September 2021, WPL issued $300 million of 1.95% debentures due 2031. The debentures were issued as green bonds, and an amount equal to or in excess of the net proceeds will be disbursed for the construction and development of WPL’s wind and solar EGUs.


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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		2021	2020	2021	2020	2021	2020
Three Months Ended September 30								Three Months Ended September 30	2021	2020	2021	2020	2021	2020
Electric Utility:	Electric Utility:							Electric Utility:
Retail - residential	Retail - residential	$262	$266	$139	$147	$123	$119	Retail - residential	$348	$328	$207	$189	$141	$139
Retail - commercial	Retail - commercial	172	183	110	120	62	63	Retail - commercial	232	210	160	142	72	68
Retail - industrial	Retail - industrial	202	210	112	121	90	89	Retail - industrial	265	241	158	149	107	92
Wholesale	Wholesale	40	40	11	14	29	26	Wholesale	55	47	18	17	37	30
Bulk power and other	Bulk power and other	25	31	14	23	11	8	Bulk power and other	39	26	12	22	27	4
Total Electric Utility	Total Electric Utility	701	730	386	425	315	305	Total Electric Utility	939	852	555	519	384	333
Gas Utility:	Gas Utility:							Gas Utility:
Retail - residential	Retail - residential	99	91	52	49	47	42	Retail - residential	24	22	14	12	10	10
Retail - commercial	Retail - commercial	53	45	27	24	26	21	Retail - commercial	13	10	8	6	5	4
Retail - industrial	Retail - industrial	5	4	3	2	2	2	Retail - industrial	3	2	3	1	—	1
Transportation/other	Transportation/other	13	12	9	8	4	4	Transportation/other	10	8	6	5	4	3
Total Gas Utility	Total Gas Utility	170	152	91	83	79	69	Total Gas Utility	50	42	31	24	19	18
Other Utility:	Other Utility:							Other Utility:
Steam	Steam	9	10	9	10	—	—	Steam	9	8	9	8	—	—
Other utility	Other utility	4	2	3	1	1	1	Other utility	4	2	4	2	—	—
Total Other Utility	Total Other Utility	13	12	12	11	1	1	Total Other Utility	13	10	13	10	—	—
Non-Utility and Other:	Non-Utility and Other:							Non-Utility and Other:
Transportation and other		17	22	—	—	—	—
Travero and other								Travero and other	22	16	—	—	—	—

Total Non-Utility and Other	Total Non-Utility and Other	17	22	—	—	—	—	Total Non-Utility and Other	22	16	—	—	—	—
Total revenues	Total revenues	$901	$916	$489	$519	$395	$375	Total revenues	$1,024	$920	$599	$553	$403	$351



	Alliant Energy		IPL		WPL
Nine Months Ended September 30	2021	2020	2021	2020	2021	2020
Electric Utility:
Retail - residential	$868	$845	$488	$472	$380	$373
Retail - commercial	579	556	385	371	194	185
Retail - industrial	677	648	386	384	291	264
Wholesale	142	127	44	44	98	83
Bulk power and other	91	81	40	61	51	20
Total Electric Utility	2,357	2,257	1,343	1,332	1,014	925
Gas Utility:
Retail - residential	162	146	90	79	72	67
Retail - commercial	85	70	47	38	38	32
Retail - industrial	11	8	8	5	3	3
Transportation/other	31	29	20	19	11	10
Total Gas Utility	289	253	165	141	124	112
Other Utility:
Steam	27	27	27	27	—	—
Other utility	9	5	8	4	1	1
Total Other Utility	36	32	35	31	1	1
Non-Utility and Other:
Travero and other	60	57	—	—	—	—

Total Non-Utility and Other	60	57	—	—	—	—
Total revenues	$2,742	$2,599	$1,543	$1,504	$1,139	$1,038

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 decreases in Alliant Energy’s and WPL’s overall effective income tax rates for the three and nine months ended ~~March 31,~~September 30, 2021 compared to the same ~~period~~periods in 2020 were primarily due to increased amortization of excess deferred taxes primarily at WPL, which were used to offset increases in WPL’s 2021 increased revenue requirements.

Alliant Energy IPL WPL
Three Months Ended March 31 2021 2020 2021 2020 2021 2020
Overall income tax rate (19%) (12%) (17%) (19%) (29%) (10%)


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	Alliant Energy				IPL				WPL
	Three Months		Nine Months		Three Months		Nine Months		Three Months		Nine Months
	2021	2020	2021	2020	2021	2020	2021	2020	2021	2020	2021	2020
Overall income tax rate	(9%)	(9%)	(13%)	(9%)	(8%)	(14%)	(11%)	(14%)	(19%)	(7%)	(24%)	(8%)

Deferred Tax Assets and Liabilities -

Carryforwards - At ~~March 31,~~September 30, 2021, 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	Federal net operating losses	2037	$331	$306	$3	Federal net operating losses	2037	$170	$157	$1
State net operating losses	State net operating losses	2021-2041	627	16	2	State net operating losses	2021-2041	592	24	2
Federal tax credits	Federal tax credits	2022-2041	481	280	180	Federal tax credits	2022-2041	547	339	186

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	2021	2020			2021	2020		Alliant Energy	2021	2020	2021	2020	2021	2020	2021	2020
Service cost	Service cost	$3	$3			$1	$1		Service cost	$2	$3	$8	$8	$1	$1	$3	$3
Interest cost	Interest cost	8	11			1	2		Interest cost	9	10	26	32	1	2	3	5
Expected return on plan assets	Expected return on plan assets	(17)	(18)			(1)	(2)		Expected return on plan assets	(17)	(17)	(51)	(52)	(1)	(1)	(3)	(4)

Amortization of prior service credit									Amortization of prior service credit	(1)	—	(1)	—	—	—	—	—
Amortization of actuarial loss	Amortization of actuarial loss	10	9			1	1		Amortization of actuarial loss	10	9	29	26	1	—	3	2

Settlement losses (a)	Settlement losses (a)	0	4			0	0		Settlement losses (a)	—	—	—	4	—	—	—	—
		$4	$9			$2	$2			$3	$5	$11	$18	$2	$2	$6	$6


		Defined Benefit Pension Plans		OPEB Plans	Defined Benefit Pension Plans					OPEB Plans
					Three Months			Nine Months		Three Months		Nine Months
IPL	IPL	2021	2020			2021	2020		IPL	2021	2020	2021	2020	2021	2020	2021	2020
Service cost	Service cost	$2	$1			$0	$0		Service cost	$1	$2	$5	$5	$—	$—	$1	$1
Interest cost	Interest cost	4	5			1	1		Interest cost	4	5	12	15	1	1	2	2
Expected return on plan assets	Expected return on plan assets	(8)	(8)			(1)	(1)		Expected return on plan assets	(8)	(8)	(24)	(24)	(1)	(1)	(3)	(3)

Amortization of actuarial loss	Amortization of actuarial loss	4	4			0	0		Amortization of actuarial loss	5	4	13	11	—	—	1	1
		$2	$2			$0	$0			$2	$3	$6	$7	$—	$—	$1	$1


		Defined Benefit Pension Plans		OPEB Plans	Defined Benefit Pension Plans					OPEB Plans
					Three Months			Nine Months		Three Months		Nine Months
WPL	WPL	2021	2020			2021	2020		WPL	2021	2020	2021	2020	2021	2020	2021	2020
Service cost	Service cost	$1	$1			$0	$0		Service cost	$1	$1	$3	$3	$1	$—	$1	$1
Interest cost	Interest cost	4	5			0	1		Interest cost	3	5	11	14	—	1	1	2
Expected return on plan assets	Expected return on plan assets	(8)	(8)			0	0		Expected return on plan assets	(8)	(8)	(23)	(23)	—	(1)	—	(1)

Amortization of actuarial loss	Amortization of actuarial loss	5	4			1	0		Amortization of actuarial loss	5	4	14	12	1	1	2	2

		$2	$2			$1	$1			$1	$2	$5	$6	$2	$1	$4	$4

(a)Settlement losses related to payments made to retired executives of Alliant Energy.

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
		2021	2020		2021	2020			2021	2020			2021	2020	2021	2020	2021	2020	2021	2020	2021	2020	2021	2020
Compensation expense	Compensation expense	$3	$3		$1	$1			$1	$1		Compensation expense	$4	$5	$9	$10	$2	$3	$5	$6	$2	$2	$4	$4
Income tax benefits	Income tax benefits	1	1		0	0			0	0		Income tax benefits	1	1	3	3	—	1	1	2	—	—	1	1


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As of ~~March 31,~~September 30, 2021, Alliant Energy’s, IPL’s and WPL’s total unrecognized compensation cost related to share-based compensation awards was ~~$13 million,~~ $7 million, $4 million and $5$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, 2021, performance shares, performance restricted stock units and restricted stock units were granted to key employees 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	72,774	$46.19	Performance shares	73,112	$46.19
Performance restricted stock units	Performance restricted stock units	72,774	48.61	Performance restricted stock units	73,112	48.66
Restricted stock units	Restricted stock units	79,862	48.61	Restricted stock units	80,152	48.65

As of ~~March 31,~~September 30, 2021, ~~425,849~~491,406 shares were included in the calculation of diluted EPS related to the nonvested equity awards.

NOTE 11. ASSET RETIREMENT OBLIGATIONS

A reconciliation of the changes in asset retirement obligations associated with long-lived assets for the nine months ended September 30, 2021 is as follows (in millions):


	Alliant Energy	IPL
Balance, January 1	$251	$177
Revisions in estimated cash flows	37	32
Liabilities settled	(10)	(8)
Liabilities incurred	1	—
Accretion expense	6	4
Balance, September 30	$285	$205

NOTE ~~10.~~12. DERIVATIVE INSTRUMENTS

Commodity Derivatives -

Notional Amounts - As of ~~March 31,~~September 30, 2021, 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				FTRs	Natural Gas		Coal		Diesel Fuel
			MWhs	Years	Dths	Years	Tons	Years	Gallons	Years			MWhs	Years	Dths	Years	Tons	Years	Gallons	Years
Alliant Energy	Alliant Energy		3,531	2021	198,347	2021-2028	5,601	2021-2023	4,914	2021-2022	Alliant Energy		13,265	2021-2022	189,332	2021-2030	4,280	2021-2023	3,654	2021-2022
IPL	IPL		1,203	2021	97,747	2021-2028	2,100	2021-2023	0	—	IPL		4,014	2021-2022	103,859	2021-2030	1,807	2021-2023	—	—
WPL	WPL		2,328	2021	100,600	2021-2027	3,501	2021-2023	4,914	2021-2022	WPL		9,251	2021-2022	85,473	2021-2030	2,473	2021-2023	3,654	2021-2022

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, 2021	December 31, 2020	March 31, 2021	December 31, 2020	March 31, 2021	December 31, 2020		September 30, 2021	December 31, 2020	September 30, 2021	December 31, 2020	September 30, 2021	December 31, 2020
Current derivative assets	Current derivative assets	$18	$24	$12	$20	$6	$4	Current derivative assets	$158	$24	$72	$20	$86	$4
Non-current derivative assets	Non-current derivative assets	10	10	7	9	3	1	Non-current derivative assets	78	10	43	9	35	1
Current derivative liabilities	Current derivative liabilities	2	9	0	3	2	6	Current derivative liabilities	3	9	3	3	—	6
Non-current derivative liabilities	Non-current derivative liabilities	11	16	6	9	5	7	Non-current derivative liabilities	1	16	1	9	—	7

During the nine months ended September 30, 2021, Alliant Energy’s, IPL’s and WPL’s derivative assets increased and derivative liabilities decreased primarily as a result of higher natural gas prices. Based on IPL’s and WPL’s natural gas cost recovery mechanisms, this resulted in corresponding decreases in derivative regulatory assets and increases in derivative regulatory 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, 2021 and December 31, 2020, 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


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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,~~September 30, 2021 and December 31, 2020. 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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NOTE ~~11.~~13. 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, 2021					December 31, 2020					Alliant Energy	September 30, 2021					December 31, 2020
			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	$8	$8	$0	$0	$8	$44	$44	$0	$0	$44	Money market fund investments	$9	$9	$—	$—	$9	$44	$44	$—	$—	$44
Derivatives	Derivatives	28	0	12	16	28	34	0	5	29	34	Derivatives	236	—	207	29	236	34	—	5	29	34
Deferred proceeds	Deferred proceeds	107	0	0	107	107	188	0	0	188	188	Deferred proceeds	164	—	—	164	164	188	—	—	188	188
Liabilities:	Liabilities:											Liabilities:
Derivatives	Derivatives	13	0	13	0	13	25	0	25	0	25	Derivatives	4	—	4	—	4	25	—	25	—	25
Long-term debt (incl. current maturities)	Long-term debt (incl. current maturities)	6,779	0	7,613	1	7,614	6,777	0	8,107	2	8,109	Long-term debt (incl. current maturities)	7,075	—	8,083	1	8,084	6,777	—	8,107	2	8,109


IPL	IPL	March 31, 2021					December 31, 2020					IPL	September 30, 2021					December 31, 2020
			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	$8	$8	$0	$0	$8	$44	$44	$0	$0	$44	Money market fund investments	$9	$9	$—	$—	$9	$44	$44	$—	$—	$44
Derivatives	Derivatives	19	0	4	15	19	29	0	3	26	29	Derivatives	115	—	96	19	115	29	—	3	26	29
Deferred proceeds	Deferred proceeds	107	0	0	107	107	188	0	0	188	188	Deferred proceeds	164	—	—	164	164	188	—	—	188	188
Liabilities:	Liabilities:											Liabilities:
Derivatives	Derivatives	6	0	6	0	6	12	0	12	0	12	Derivatives	4	—	4	—	4	12	—	12	—	12
Long-term debt	Long-term debt	3,346	0	3,745	0	3,745	3,345	0	4,021	0	4,021	Long-term debt	3,347	—	3,849	—	3,849	3,345	—	4,021	—	4,021


WPL	WPL	March 31, 2021					December 31, 2020					WPL	September 30, 2021					December 31, 2020
			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:

Derivatives	Derivatives	$9	$0	$8	$1	$9	$5	$0	$2	$3	$5	Derivatives	$121	$—	$111	$10	$121	$5	$—	$2	$3	$5
Liabilities:	Liabilities:											Liabilities:
Derivatives	Derivatives	7	0	7	0	7	13	0	13	0	13	Derivatives	—	—	—	—	—	13	—	13	—	13
Long-term debt	Long-term debt	2,131	0	2,495	0	2,495	2,130	0	2,690	0	2,690	Long-term debt	2,429	—	2,869	—	2,869	2,130	—	2,690	—	2,690


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Information for Alliant Energy’s and IPL’s fair value measurements using significant unobservable inputs (Level 3 inputs) was as follows (in millions). Such amounts for WPL were not material.

Alliant Energy Commodity Contract Derivative
Assets and (Liabilities), net Deferred Proceeds
Three Months Ended March 31 2021 2020 2021 2020
Beginning balance, January 1 $29 $21 $188 $188
Total net losses included in changes in net assets (realized/unrealized) (6) (3) 0 0
Settlements (a) (7) (4) (81) 0
Ending balance, March 31 $16 $14 $107 $188
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 March 31 ($6) ($3) $0 $0


Alliant Energy	Commodity Contract Derivative
	Assets and (Liabilities), net		Deferred Proceeds
Three Months Ended September 30	2021	2020	2021	2020
Beginning balance, July 1	$39	$36	$154	$194
Total net gains included in changes in net assets (realized/unrealized)	5	—	—	—

Transfers out of Level 3	(8)	—	—	—

Sales	—	(1)	—	—
Settlements (a)	(7)	(5)	10	7
Ending balance, September 30	$29	$30	$164	$201
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	$5	($1)	$—	$—



Alliant Energy	Commodity Contract Derivative
	Assets and (Liabilities), net		Deferred Proceeds
Nine Months Ended September 30	2021	2020	2021	2020
Beginning balance, January 1	$29	$21	$188	$188
Total net gains included in changes in net assets (realized/unrealized)	6	8	—	—

Transfers out of Level 3	(8)	—	—	—
Purchases	21	14	—	—
Sales	—	(1)	—	—
Settlements (a)	(19)	(12)	(24)	13
Ending balance, September 30	$29	$30	$164	$201
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	$6	$8	$—	$—


IPL	Commodity Contract Derivative
	Assets and (Liabilities), net		Deferred Proceeds
Three Months Ended September 30	2021	2020	2021	2020
Beginning balance, July 1	$30	$32	$154	$194
Total net gains (losses) included in changes in net assets (realized/unrealized)	2	(1)	—	—

Transfers out of Level 3	(8)	—	—	—

Sales	—	(1)	—	—
Settlements (a)	(5)	(4)	10	7
Ending balance, September 30	$19	$26	$164	$201
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	$2	($1)	$—	$—


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IPL Commodity Contract Derivative
Assets and (Liabilities), net Deferred Proceeds
Three Months Ended March 31 2021 2020 2021 2020
Beginning balance, January 1 $26 $18 $188 $188
Total net losses included in changes in net assets (realized/unrealized) (5) (2) 0 0
Settlements (a) (6) (3) (81) 0
Ending balance, March 31 $15 $13 $107 $188
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 March 31 ($6) ($2) $0 $0



IPL	Commodity Contract Derivative
	Assets and (Liabilities), net		Deferred Proceeds
Nine Months Ended September 30	2021	2020	2021	2020
Beginning balance, January 1	$26	$18	$188	$188
Total net gains included in changes in net assets (realized/unrealized)	—	7	—	—

Transfers out of Level 3	(8)	—	—	—
Purchases	16	11	—	—
Sales	—	(1)	—	—
Settlements (a)	(15)	(9)	(24)	13
Ending balance, September 30	$19	$26	$164	$201
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	$—	$7	$—	$—

(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.


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Commodity Contracts - The fair value of FTR and natural gas commodity contracts categorized as Level 3 was recognized as net derivative assets 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, 2021		$11	$5	$11	$4	$0	$1
September 30, 2021								September 30, 2021	$7	$22	$5	$14	$2	$8
December 31, 2020	December 31, 2020	18	11	17	9	1	2	December 31, 2020	18	11	17	9	1	2

NOTE ~~12.~~14. COMMITMENTS AND CONTINGENCIES

NOTE ~~12(a)~~14(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, 2021, Alliant Energy’s and WPL’s minimum future commitments for these projects were ~~$10~~$95 million and ~~$10~~$93 million, respectively.

NOTE ~~12(b)~~14(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, 2021, related minimum future commitments were as follows (in millions):


		Alliant Energy	IPL	WPL		Alliant Energy	IPL	WPL

Natural gas	Natural gas	$958	$466	$492	Natural gas	$985	$514	$471
Coal	Coal	94	55	39	Coal	82	54	28
Other (a)	Other (a)	122	60	30	Other (a)	134	71	39
		$1,174	$581	$561		$1,201	$639	$538

(a)Includes individual commitments incurred during the normal course of business that exceeded $1 million at ~~March 31,~~September 30, 2021.

NOTE ~~12(c)~~14(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.

As of ~~March 31,~~September 30, 2021, the currently known partnership obligations for the abandonment obligations are estimated at $68 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 $68 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, 2021 and December 31, 2020, 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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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 ~~$74~~$67 million as of ~~March 31,~~September 30, 2021 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, 2021 and December 31, 2020.

NOTE ~~12(d)~~14(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, 2021, 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, 2021, such amounts for WPL were not material.

Alliant Energy IPL
Range of estimated future costs $9 - $25 $7 - $19
Current and non-current environmental liabilities $13 $9


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	Alliant Energy			IPL
Range of estimated future costs	$9	-	$24	$6	-	$19
Current and non-current environmental liabilities	$12			$9

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 Burlington by December 31, 2021 and 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 ~~13.~~15. 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, 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
Three Months Ended March 31, 2020
Three Months Ended September 30, 2021								Three Months Ended September 30, 2021
Revenues	Revenues	$730	$152	$12	$894	$22	$916	Revenues	$939	$50	$13	$1,002	$22	$1,024
Operating income (loss)	Operating income (loss)	146	41	4	191	(3)	188	Operating income (loss)	290	(5)	(5)	280	9	289

Net income (loss) attributable to Alliant Energy common shareowners					173	(3)	170
Net income attributable to Alliant Energy common shareowners								Net income attributable to Alliant Energy common shareowners				250	6	256
Three Months Ended September 30, 2020								Three Months Ended September 30, 2020
Revenues								Revenues	$852	$42	$10	$904	$16	$920
Operating income (loss)								Operating income (loss)	251	(1)	1	251	21	272

Net income attributable to Alliant Energy common shareowners								Net income attributable to Alliant Energy common shareowners				221	25	246



Alliant Energy					ATC Holdings,	Alliant
	Utility				Non-Utility,	Energy
	Electric	Gas	Other	Total	Parent and Other	Consolidated
	(in millions)
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
Nine Months Ended September 30, 2020
Revenues	$2,257	$253	$32	$2,542	$57	$2,599
Operating income	549	48	5	602	26	628



Net income attributable to Alliant Energy common shareowners				510	40	550


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IPL	IPL	Electric	Gas	Other	Total	IPL	Electric	Gas	Other	Total
		(in millions)					(in millions)
Three Months Ended March 31, 2021
Three Months Ended September 30, 2021						Three Months Ended September 30, 2021
Revenues						Revenues	$555	$31	$13	$599
Operating income (loss)						Operating income (loss)	186	(3)	(3)	180
Net income available for common stock						Net income available for common stock				157
Three Months Ended September 30, 2020						Three Months Ended September 30, 2020
Revenues	Revenues	$386	$91	$12	$489	Revenues	$519	$24	$10	$553
Operating income	Operating income	72	30	1	103	Operating income	159	1	2	162
Net income available for common stock	Net income available for common stock				79	Net income available for common stock				148
Three Months Ended March 31, 2020
Nine Months Ended September 30, 2021						Nine Months Ended September 30, 2021
Revenues						Revenues	$1,343	$165	$35	$1,543
Operating income (loss)						Operating income (loss)	365	30	(1)	394
Net income available for common stock						Net income available for common stock				322
Nine Months Ended September 30, 2020						Nine Months Ended September 30, 2020
Revenues	Revenues	$425	$83	$11	$519	Revenues	$1,332	$141	$31	$1,504
Operating income	Operating income	67	27	3	97	Operating income	308	34	5	347
Net income available for common stock	Net income available for common stock				83	Net income available for common stock				290


WPL	WPL	Electric	Gas	Other	Total	WPL	Electric	Gas	Other	Total
		(in millions)					(in millions)
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
Three Months Ended September 30, 2020						Three Months Ended September 30, 2020
Revenues						Revenues	$333	$18	$—	$351
Operating income (loss)						Operating income (loss)	92	(2)	(1)	89
Net income						Net income				73
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
Nine Months Ended September 30, 2020						Nine Months Ended September 30, 2020
Revenues	Revenues	$315	$79	$1	$395	Revenues	$925	$112	$1	$1,038
Operating income	Operating income	75	14	1	90	Operating income	241	14	—	255
Net income	Net income				84	Net income				220
Three Months Ended March 31, 2020
Revenues		$305	$69	$1	$375
Operating income		79	14	1	94
Net income					90

NOTE ~~14.~~16. 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
		2021	2020			2021	2020			2021	2020	2021	2020	2021	2020	2021	2020
Corporate Services billings	Corporate Services billings	$40	$37			$35	$32		Corporate Services billings	$50	$53	$138	$134	$37	$41	$113	$108
Sales credited	Sales credited	1	15			1	2		Sales credited	4	10	9	35	16	—	23	4
Purchases billed	Purchases billed	143	81			26	20		Purchases billed	105	110	347	248	24	39	71	79

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

IPL WPL
March 31, 2021 December 31, 2020 March 31, 2021 December 31, 2020
Net payables to Corporate Services $73 $110 $60 $73

IPL

WPL

September 30, 2021

December 31, 2020

September 30, 2021

December 31, 2020

Net payables to Corporate Services

$109

$110

$80

$73


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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
		2021	2020			2021	2020	2021	2020
ATC billings to WPL	ATC billings to WPL	$32	$28		ATC billings to WPL	$29	$27	$91	$80
WPL billings to ATC	WPL billings to ATC	3	3		WPL billings to ATC	4	2	13	8

WPL owed ATC net amounts of $9$8 million as of ~~March 31,~~September 30, 2021 and $9 million as of December 31, 2020.

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 2020 Form 10-K. Unless otherwise noted, all “per share” references in MDA refer to earnings per diluted share.


			21

~~Table of Contents~~

2021 HIGHLIGHTS

Key highlights since the filing of the 2020 Form 10-K include the following:

Customer ~~Investments:~~Investments (refer to “Customer Investments” for details):

•In March 2021, WPL filed aits second Certificate of Authority with the PSCW for approval to acquire, construct, own, and operate up to 414 MW of new solar generation ~~by the end of 2023~~ in ~~the following~~various Wisconsin ~~counties: Dodge (150 MW), Waushara (99 MW), Rock (65 MW), Grant (50 MW) and Green (50 MW).~~ counties.

•In ~~April~~June 2021, WPL received an ~~oral decision~~order from the PSCW for its first Certificate of Authority authorizing WPL to acquire, own and operate 675 MW of new solar generation in various Wisconsin ~~counties, and a written order from~~counties.

•In November 2021, IPL filed for advance rate-making principles with the ~~PSCW is currently expected in May 2021. A significant majority of the capital expenditures~~IUB for ~~these 1,089 MWs of solar generation projects were included in the anticipated construction and acquisition expenditures included in “Liquidity and Capital Resources” in the 2020~~ ~~Form 10-K. WPL proposes~~up to own and operate the solar generation projects, which are currently expected to qualify for 30% investment tax credits, through a tax equity partnership, with approximately 35% to 45% of the construction costs financed with capital from the tax equity partner. WPL requested to include $355 million and $585 million in rate base for the 414 MW and 675400 MW of new solar generation ~~respectively, which reflects its portion of capital expenditures, less the amounts financed by the tax equity partner. The 1,089~~and up to 75 MW of new solar generation would replace energy and capacity being eliminated with the planned retirement of the coal-fired Edgewater Generating Station (414 MW) by the end of 2022, and Columbia Unit 1 by the end of 2023 and Columbia Unit 2 by the end of 2024 (595 MW in aggregate).battery storage.

Rate Matters:

•In May 2021, WPL filed a ~~notice~~proposed settlement with the PSCW ~~of its intent to enter into a settlement agreement with certain intervenor groups~~ for annual base rate increases of $70 million and $15 million for WPL’s retail electric and gas customers, respectively, covering the 2022/2023 ~~forward looking~~forward-looking Test ~~Period.~~Period, which was based on a stipulated agreement between WPL and certain intervenor groups. In November 2021, WPL filed updated information with the PSCW to reflect anticipated increases in retail fuel-related costs in 2022. As a result, annual rates for WPL’s retail electric customers are currently expected to increase by an additional $45 million in 2022, for a total of $115 million. The key drivers for the proposed annual base rate increases include lower excess deferred income tax benefits in 2022 and 2023 and revenue requirement impacts of increasing electric and gas rate base, including investments in solar generation. In addition, ~~tentative agreement has been reached proposing~~the settlement proposes WPL maintain its current authorized return on common equity of 10%, implement a 54% common equity component of regulatory capital structure, as well as receive a recovery of and a return on the remaining net book value of Edgewater Unit 5, which is currently expected to be retired by the end of 2022. WPL currently ~~plans to file its related rate review request with the PSCW in the second quarter of 2021 and~~ expects any rate changes granted from this request to be effective on January 1, 2022 and extend through the end of 2023.

•In ~~April~~June 2021, the IUB ~~issued an order that~~adopted new rules ~~are to be adopted, which would~~that establish minimum filing requirements for rate reviews using a forward-looking test period, and the related subsequent proceeding review after the close of the forward-looking test period. The rules provide that in the subsequent proceeding review, a utility’s actual costs and revenues shall be presumed to be reasonably consistent with the forward-looking test period if the utility’s actual return on common equity falls ~~with~~within a standard of reasonableness of 50 basis points above orto 50 basis points below the authorized return on common equity. ~~The new rules are currently expected~~If the utility’s actual return on common equity is outside of this range, future rates could be adjusted.

•In August 2021, the IUB issued an order for IPL’s 2020 forward-looking Test Period gas subsequent proceeding, authorizing IPL to ~~be effective later in 2021.~~maintain its current retail gas rates.

•In November 2021, the IUB issued an order for IPL’s 2020 forward-looking Test Period electric subsequent proceeding, authorizing IPL to maintain its current retail electric rates.

Legislative Matters:

•In March 2021, the American Rescue Plan Act of 2021 (Act) was enacted. The most significant provision of the Act for Alliant Energy is reduced minimum pension plan funding requirements, which Alliant Energy ~~is currently evaluating.~~adopted in August 2021. The Act also provides additional funding to the Low Income Home Energy Assistance Program, which assists certain of Alliant Energy’s customers with managing their energy costs, as well as provides financial support for certain of Alliant Energy’s residential, small business and non-profit customers.

•In April 2021, legislation was enacted in Iowa prohibiting counties and cities from regulating the sale of natural gas and ~~propane.~~propane, which supports IPL’s ability to provide gas utility service to a diversified base of retail customers and industries.


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Table of Contents

Financings and Common Stock Dividends:

•In September 2021, WPL issued $300 million of 1.95% debentures due 2031. The debentures were issued as green bonds, and an amount equal to or in excess of the net proceeds will be disbursed for the construction and development of WPL’s wind and solar EGUs.

•Refer to “Results of Operations” for discussion of expected issuances of common stock dividends and expected future issuances and retirements of long-term debt by the end of 2022.

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):


		2021		2020			2021		2020
		Income	EPS	Income (Loss)	EPS		Income (Loss)	EPS	Income	EPS

Utilities and Corporate Services	Utilities and Corporate Services	$166	$0.66	$175	$0.72	Utilities and Corporate Services	$254	$1.01	$224	$0.89
ATC Holdings	ATC Holdings	8	0.03	8	0.03	ATC Holdings	8	0.03	8	0.03
Non-utility and Parent	Non-utility and Parent	(3)	(0.01)	(13)	(0.05)	Non-utility and Parent	(6)	(0.02)	14	0.06

Alliant Energy Consolidated	Alliant Energy Consolidated	$171	$0.68	$170	$0.70	Alliant Energy Consolidated	$256	$1.02	$246	$0.98

Alliant Energy’s Utilities and Corporate Services net income ~~decreased~~increased by $9$30 million for the three-month period, primarily due to ~~timing of income taxes, higher depreciation expense and lower allowance for funds used during construction. These items were partially offset by~~ higher earnings resulting from IPL’s and WPL’s increasing rate base, ~~and~~as well as higher ~~retail electric and gas~~ sales due in part to ~~temperatures~~the derecho windstorm in Iowa and COVID-19 sales impacts in the ~~first~~third quarter of ~~2021 compared to the first quarter of~~ 2020. These items were partially offset by higher depreciation expense and lower AFUDC.

Alliant Energy’s Non-utility and Parent net income ~~increased~~decreased by ~~$10~~$20 million for the three-month period, primarily due to aan adjustment in 2020 to the credit loss ~~charge in the first quarter of 2020~~liability related to legacy guarantees associated with an affiliate of Whiting ~~Petroleum.~~Petroleum and timing of income taxes.


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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	2021	2020	2021	2020	2021	2020	Three Months	2021	2020	2021	2020	2021	2020
Operating income	Operating income	$198	$188	$103	$97	$90	$94	Operating income	$289	$272	$180	$162	$100	$89
Electric utility revenues	Electric utility revenues	$701	$730	$386	$425	$315	$305	Electric utility revenues	$939	$852	$555	$519	$384	$333
Electric production fuel and purchased power expenses	Electric production fuel and purchased power expenses	(133)	(184)	(59)	(106)	(74)	(78)	Electric production fuel and purchased power expenses	(207)	(179)	(101)	(102)	(105)	(78)
Electric transmission service expense	Electric transmission service expense	(134)	(122)	(92)	(84)	(42)	(38)	Electric transmission service expense	(148)	(132)	(103)	(93)	(44)	(39)
Utility Electric Margin (non-GAAP)	Utility Electric Margin (non-GAAP)	434	424	235	235	199	189	Utility Electric Margin (non-GAAP)	584	541	351	324	235	216
Gas utility revenues	Gas utility revenues	170	152	91	83	79	69	Gas utility revenues	50	42	31	24	19	18
Cost of gas sold	Cost of gas sold	(100)	(85)	(50)	(44)	(50)	(41)	Cost of gas sold	(18)	(11)	(12)	(6)	(6)	(4)
Utility Gas Margin (non-GAAP)	Utility Gas Margin (non-GAAP)	70	67	41	39	29	28	Utility Gas Margin (non-GAAP)	32	31	19	18	13	14
Other utility revenues	Other utility revenues	13	12	12	11	1	1	Other utility revenues	13	10	13	10	—	—
Non-utility revenues	Non-utility revenues	17	22	—	—	—	—	Non-utility revenues	22	16	—	—	—	—
Other operation and maintenance expenses	Other operation and maintenance expenses	(146)	(163)	(77)	(87)	(59)	(54)	Other operation and maintenance expenses	(171)	(143)	(95)	(85)	(66)	(65)
Depreciation and amortization expenses	Depreciation and amortization expenses	(164)	(146)	(94)	(86)	(69)	(59)	Depreciation and amortization expenses	(165)	(156)	(94)	(89)	(70)	(65)
Taxes other than income tax expense	Taxes other than income tax expense	(26)	(28)	(14)	(15)	(11)	(11)	Taxes other than income tax expense	(26)	(27)	(14)	(16)	(12)	(11)
Operating income	Operating income	$198	$188	$103	$97	$90	$94	Operating income	$289	$272	$180	$162	$100	$89



	Alliant Energy		IPL		WPL
Nine Months	2021	2020	2021	2020	2021	2020
Operating income	$663	$628	$394	$347	$245	$255
Electric utility revenues	$2,357	$2,257	$1,343	$1,332	$1,014	$925
Electric production fuel and purchased power expenses	(478)	(527)	(215)	(304)	(263)	(223)
Electric transmission service expense	(403)	(326)	(274)	(212)	(128)	(114)
Utility Electric Margin (non-GAAP)	1,476	1,404	854	816	623	588
Gas utility revenues	289	253	165	141	124	112
Cost of gas sold	(149)	(117)	(84)	(63)	(65)	(53)
Utility Gas Margin (non-GAAP)	140	136	81	78	59	59
Other utility revenues	36	32	35	31	1	1
Non-utility revenues	60	57	—	—	—	—
Other operation and maintenance expenses	(477)	(465)	(253)	(269)	(194)	(172)
Depreciation and amortization expenses	(494)	(454)	(281)	(264)	(209)	(186)
Taxes other than income tax expense	(78)	(82)	(42)	(45)	(35)	(35)
Operating income	$663	$628	$394	$347	$245	$255

Operating Income Variances - Variances between periods in operating income for the three and nine months ended ~~March 31,~~September 30, 2021 compared to the same ~~period~~periods in 2020 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)	Total higher utility electric margin variance (Refer to details below)	$10	$—		$10		Total higher utility electric margin variance (Refer to details below)	$43	$27	$19	$72	$38	$35
Total higher utility gas margin variance (Refer to details below)		3	2		1
Total lower (higher) other operation and maintenance expenses variance (Refer to details below)		17	10		(5)
Total higher (lower) utility gas margin variance (Refer to details below)							Total higher (lower) utility gas margin variance (Refer to details below)	1	1	(1)	4	3	—
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)	(28)	(10)	(1)	(12)	16	(22)
Higher depreciation and amortization expense primarily due to additional plant in service in 2020 and 2021, including IPL’s new wind generation, and WPL’s West Riverside Energy Center and Kossuth wind farm	Higher depreciation and amortization expense primarily due to additional plant in service in 2020 and 2021, including IPL’s new wind generation, and WPL’s West Riverside Energy Center and Kossuth wind farm	(18)	(8)		(10)		Higher depreciation and amortization expense primarily due to additional plant in service in 2020 and 2021, including IPL’s new wind generation, and WPL’s West Riverside Energy Center and Kossuth wind farm	(9)	(5)	(5)	(40)	(17)	(23)
Other	Other	(2)	2		—		Other	10	5	(1)	11	7	—
		$10	$6		($4)			$17	$18	$11	$35	$47	($10)


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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
		2021	2020	2021	2020	2021	2020	2021	2020		2021	2020	2021	2020	2021	2020	2021	2020

Three Months										Three Months
Retail	Retail	$636	$659	6,272	6,125	$157	$140	23,431	22,022	Retail	$845	$779	7,031	6,762	$40	$34	3,264	3,500
Sales for resale	Sales for resale	45	57	1,071	1,879	N/A	N/A	N/A	N/A	Sales for resale	78	54	1,853	1,453	N/A	N/A	N/A	N/A
Transportation/Other	Transportation/Other	20	14	19	18	13	12	24,690	28,816	Transportation/Other	16	19	18	17	10	8	26,365	24,842
		$701	$730	7,362	8,022	$170	$152	48,121	50,838		$939	$852	8,902	8,232	$50	$42	29,629	28,342
Nine Months										Nine Months
Retail										Retail	$2,124	$2,049	19,262	18,496	$258	$224	33,299	32,545
Sales for resale										Sales for resale	181	162	4,411	4,962	N/A	N/A	N/A	N/A
Transportation/Other										Transportation/Other	52	46	53	53	31	29	74,111	79,546
											$2,357	$2,257	23,726	23,511	$289	$253	107,410	112,091


IPL	IPL	Electric				Gas				IPL	Electric				Gas
		Revenues		MWhs Sold		Revenues		Dths Sold			Revenues		MWhs Sold		Revenues		Dths Sold
		2021	2020	2021	2020	2021	2020	2021	2020		2021	2020	2021	2020	2021	2020	2021	2020

Three Months										Three Months
Retail	Retail	$361	$388	3,582	3,482	$82	$75	12,138	11,621	Retail	$525	$480	3,914	3,743	$25	$19	1,702	1,873
Sales for resale	Sales for resale	11	28	287	1,251	N/A	N/A	N/A	N/A	Sales for resale	21	25	487	765	N/A	N/A	N/A	N/A
Transportation/Other	Transportation/Other	14	9	10	10	9	8	11,178	11,294	Transportation/Other	9	14	9	9	6	5	9,308	9,020
		$386	$425	3,879	4,743	$91	$83	23,316	22,915		$555	$519	4,410	4,517	$31	$24	11,010	10,893
Nine Months										Nine Months
Retail										Retail	$1,259	$1,227	10,810	10,414	$145	$122	17,268	16,950
Sales for resale										Sales for resale	49	75	1,160	3,090	N/A	N/A	N/A	N/A
Transportation/Other										Transportation/Other	35	30	26	27	20	19	29,727	29,127
											$1,343	$1,332	11,996	13,531	$165	$141	46,995	46,077


WPL	WPL	Electric				Gas				WPL	Electric				Gas
		Revenues		MWhs Sold		Revenues		Dths Sold			Revenues		MWhs Sold		Revenues		Dths Sold
		2021	2020	2021	2020	2021	2020	2021	2020		2021	2020	2021	2020	2021	2020	2021	2020

Three Months										Three Months
Retail	Retail	$275	$271	2,690	2,643	$75	$65	11,293	10,401	Retail	$320	$299	3,117	3,019	$15	$15	1,562	1,627
Sales for resale	Sales for resale	34	29	784	628	N/A	N/A	N/A	N/A	Sales for resale	57	29	1,366	688	N/A	N/A	N/A	N/A
Transportation/Other	Transportation/Other	6	5	9	8	4	4	13,512	17,522	Transportation/Other	7	5	9	8	4	3	17,057	15,822
		$315	$305	3,483	3,279	$79	$69	24,805	27,923		$384	$333	4,492	3,715	$19	$18	18,619	17,449
Nine Months										Nine Months
Retail										Retail	$865	$822	8,452	8,082	$113	$102	16,031	15,595
Sales for resale										Sales for resale	132	87	3,251	1,872	N/A	N/A	N/A	N/A
Transportation/Other										Transportation/Other	17	16	27	26	11	10	44,384	50,419
											$1,014	$925	11,730	9,980	$124	$112	60,415	66,014

Sales Trends and Temperatures - Alliant Energy’s retail electric and gas sales volumes increased 2%4% and 6%decreased 7%, respectively, for the three months ended ~~March 31,~~September 30, 2021 compared to the same period in 2020, primarily due to COVID-19 impacts in Alliant Energy’s service territories, impacts from the derecho windstorm in IPL’s service territory in August 2020 and changes in temperatures. Alliant Energy’s retail electric and gas sales volumes increased 4% and 2%, respectively, for the nine months ended September 30, 2021 compared to the same period in 2020, primarily due to changes in temperatures, COVID-19 impacts in Alliant Energy’s service territories and impacts from the derecho windstorm in IPL’s service territory in August 2020, partially offset by the impact on sales of the additional day due to leap year in 2020. For the three and nine months ended September 30, 2021, changes in COVID-19 impacts resulted in decreases for retail electric residential sales volumes and increases for retail electric commercial and industrial sales.


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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
		2021	2020	Change				2021		2020	Change			2021	2020	Change	2021	2020	Change	2021	2020	Change	2021	2020	Change
IPL	IPL	$2	($3)	$5				$2		($2)	$4		IPL	$5	$3	$2	$16	$2	$14	($1)	$—	($1)	$1	$—	$1
WPL	WPL	1	(3)	4				—		(1)	1		WPL	—	3	(3)	9	3	6	—	—	—	—	(1)	1
Total Alliant Energy	Total Alliant Energy	$3	($6)	$9				$2		($3)	$5		Total Alliant Energy	$5	$6	($1)	$25	$5	$20	($1)	$—	($1)	$1	($1)	$2

Electric Sales for Resale - ~~Alliant Energy’s and IPL’s electric~~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 - ~~Alliant Energy's and WPL's gas~~Gas transportation/other sales volume changes were largely due to changes in the gas volumes supplied to ~~WPL's~~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, 2021 compared to the same ~~period~~periods in 2020 as follows (in millions):


				Three Months		Nine Months
		Alliant Energy	IPL		WPL			Alliant Energy	IPL	WPL	Alliant Energy	IPL	WPL
Higher revenue requirements due to increasing rate base (a) (b)	Higher revenue requirements due to increasing rate base (a) (b)	$13	$10		$3		Higher revenue requirements due to increasing rate base (a) (b)	$12	$9	$3	$38	$28	$10

Estimated changes in sales volumes caused by temperatures	Estimated changes in sales volumes caused by temperatures	9	5		4		Estimated changes in sales volumes caused by temperatures	(1)	2	(3)	20	14	6

Lower 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)		(7)	(7)		—
Higher wholesale margins at WPL partially due to a new wholesale customer in 2021							Higher wholesale margins at WPL partially due to a new wholesale customer in 2021	2	—	2	4	—	4
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)	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)	(5)	(5)		—		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)	(3)	(3)	—	(11)	(11)	—
Other		—	(3)		3
Higher (lower) 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)							Higher (lower) 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)	8	8	—	(4)	(4)	—
(Higher) lower WPL electric fuel-related costs, net of recoveries							(Higher) lower WPL electric fuel-related costs, net of recoveries	5	—	5	(2)	—	(2)
Other (includes higher temperature-normalized sales primarily due to derecho windstorm in 2020 and COVID-19 impacts)							Other (includes higher temperature-normalized sales primarily due to derecho windstorm in 2020 and COVID-19 impacts)	20	11	12	27	11	17
		$10	$—		$10			$43	$27	$19	$72	$38	$35


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~~Table of Contents~~

(a)IPL’s final retail electric base rate increase was effective February 26, 2020. Effective with final rates, the recovery of, and return on, IPL’s new wind generation placed in service in 2019 and 2020 is provided through the renewable energy rider. The final rate increase includes a reduction for anticipated production tax credits for IPL’s new wind generation. This reduction is expected to be offset by a reduction in income tax expense resulting from production tax credits recognized from this new wind generation. In September 2020, IPL made a buyout payment of $110 million in exchange for shortening the terms of its DAEC PPA by 5 years. The higher revenue requirements from the buyout payment, including a return on such costs, is being recovered from IPL’s retail customers from 2021 through the end of 2025.

(b)In December 2020, the PSCW issued an order authorizing WPL to maintain its current retail electric base rates through the end of 2021. WPL will utilize anticipated fuel-related cost savings and excess deferred income tax benefits in 2021 to offset the revenue requirement impacts of increasing electric rate base, including the Kossuth wind farm, which was placed in service in October 2020. The lower fuel expense benefits are recognized in electric margin and the additional amount of excess deferred income tax benefits is recognized as a reduction in income tax expense.

Utility Gas Margin Variances - The following items contributed to increased (decreased) utility gas margins for the three and nine months ended ~~March 31,~~September 30, 2021 compared to the same ~~period~~periods in 2020 as follows (in millions):


				Three Months		Nine Months
		Alliant Energy	IPL		WPL			Alliant Energy	IPL	WPL	Alliant Energy	IPL	WPL

Estimated changes in sales volumes caused by temperatures	Estimated changes in sales volumes caused by temperatures	$5	$4		$1		Estimated changes in sales volumes caused by temperatures	($1)	($1)	$—	$2	$1	$1
Other	Other	(2)	(2)		—		Other	2	2	(1)	2	2	(1)
		$3	$2		$1			$1	$1	($1)	$4	$3	$—


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Table of Contents

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, 2021 compared to the same ~~period~~periods in 2020 as follows (in millions):


				Three Months		Nine Months
		Alliant Energy	IPL		WPL			Alliant Energy	IPL	WPL	Alliant Energy	IPL	WPL
Credit loss charge in 2020 related to guarantees for an affiliate of Whiting Petroleum		$8	$—		$—
Lower bad debt expense at IPL		7	7		—
Higher generation operation and maintenance expenses							Higher generation operation and maintenance expenses	($10)	($8)	($2)	($21)	($12)	($9)
Credit loss adjustments in 2020 related to guarantees for an affiliate of Whiting Petroleum							Credit loss adjustments in 2020 related to guarantees for an affiliate of Whiting Petroleum	(15)	—	—	(7)	—	—
Lower energy efficiency expense at IPL (primarily offset by lower revenues)	Lower energy efficiency expense at IPL (primarily offset by lower revenues)	5	5		—		Lower energy efficiency expense at IPL (primarily offset by lower revenues)	2	2	—	10	10	—

(Higher) lower bad debt expense at IPL							(Higher) lower bad debt expense at IPL	(2)	(2)	—	8	8	—
Other	Other	(3)	(2)		(5)		Other	(3)	(2)	1	(2)	10	(13)
		$17	$10		($5)			($28)	($10)	($1)	($12)	$16	($22)

Other Income and Deductions Variances - The following items contributed to ~~(increased) decreased~~increased other income and deductions for the three and nine months ended ~~March 31,~~September 30, 2021 compared to the same ~~period~~periods in 2020 as follows (in millions):


				Three Months		Nine Months
		Alliant Energy	IPL		WPL			Alliant Energy	IPL	WPL	Alliant Energy	IPL	WPL

Lower allowance for funds used during construction primarily due to changes in construction work in progress balances related to IPL’s new wind generation, and WPL’s West Riverside Energy Center and Kossuth wind farm placed in service in 2020		($19)	($8)		($11)
Lower interest expense							Lower interest expense	$—	$1	$1	$1	$1	$1
Lower AFUDC primarily due to changes in construction work in progress balances related to IPL’s new wind generation, and WPL’s West Riverside Energy Center and Kossuth wind farm placed in service in 2020							Lower AFUDC primarily due to changes in construction work in progress balances related to IPL’s new wind generation, and WPL’s West Riverside Energy Center and Kossuth wind farm placed in service in 2020	(6)	(4)	(1)	(35)	(14)	(20)
Other	Other	1	—		(2)		Other	(2)	1	(1)	1	1	—
		($18)	($8)		($13)			($8)	($2)	($1)	($33)	($12)	($19)

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

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 - In the fourth quarter of 2021, IPL currently expects to issue up to $300 million of long-term debt and redeem all of its cumulative preferred stock at par value for approximately $200 million plus accrued and unpaid dividends up to the redemption date. WPL and AEF currently expect to issue up to $300 million and $800 million of long-term debt, respectively, in 2022. WPL, AEF and Corporate Services have $250 million, $300 million and $75 million of long-term debt maturing in 2022, respectively. Alliant Energy currently expects to issue approximately $25 million of common stock in 2022 through its Shareowner Direct Plan.

•Common Stock Dividends - Alliant Energy announced a 6% increase in its targeted 2022 annual common stock dividend to $1.71 per share, which is equivalent to a quarterly rate of $0.4275 per share, beginning with the February 2022 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 2022 compared to 2021 due to impacts from increasing revenue requirements related to investments in the utility business, including WPL’s solar investments. WPL’s increased revenue requirements are expected to be offset by higher income tax expense as a result of lower tax benefits.

•Other Operation and Maintenance Expenses - Alliant Energy, IPL and WPL currently expect a decrease in other operation and maintenance expenses in 2022 compared to 2021 due to cost reductions resulting from operating efficiencies.

•Depreciation and Amortization Expenses - Alliant Energy, IPL and WPL currently expect an increase in depreciation and amortization expenses in 2022 compared to 2021 due to property additions, including WPL’s expansion of solar generation.

•Interest Expense - Alliant Energy, IPL and WPL currently expect an increase in interest expense in 2022 compared to 2021 due to financings completed in 2021 and planned in 2021 and 2022 as discussed above.

•Allowance for Funds Used During Construction - Alliant Energy and WPL currently expect AFUDC to increase in 2022 compared to 2021 primarily due to increased construction work in progress balances related to WPL’s solar generation.


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CUSTOMER INVESTMENTS

Renewable Generation

Alliant Energy’s cleaner energy strategy, or Clean Energy Blueprints, currently includes the planned development and acquisition of additional renewable energy, including approximately 1,100 MW of solar generation at WPL with in-service dates in 2022-2024, approximately 400 MW of solar generation at IPL with in-service dates in 2023-2024 and approximately 75 MW of battery storage in 2024 at IPL. Alliant Energy, IPL and WPL continue to evaluate additional opportunities to add more renewable generation, including wind repowering, and additional solar generation and distributed energy resources, including community solar and energy storage systems. Estimated capital expenditures for these projects for 2021 through 2025 are included in the “Renewable projects” line in the construction and acquisition table in “Liquidity and Capital Resources.” These estimates include current expectations for higher costs for various projects, as supply constraints and commodity inflation continue to be prevalent in the solar market. In addition, these estimates reflect later expected in-service dates for certain solar projects to reflect the tight market for solar panels. IPL and WPL currently assume that a portion of the construction costs for the new solar generation will be financed by a tax equity partner, which is discussed in “IPL and WPL Solar Project Tax Equity Credits” in “Liquidity and Capital Resources.”

WPL’s Solar Generation and Distributed Energy Resources - In June 2021, WPL received an order from the PSCW for its first Certificate of Authority authorizing WPL to acquire, own and operate 675 MW of new solar generation in the following Wisconsin counties: Grant (200 MW), Sheboygan (150 MW), Wood (150 MW), Jefferson (75 MW), Richland (50 MW) and Rock (50 MW). In July 2021, WPL notified the PSCW that it currently expects estimated construction costs and related rate base additions associated with its 675 MW of new solar generation will exceed amounts approved by the PSCW in June 2021 by approximately 7-10%. In September 2021, WPL filed revised estimated construction costs and related rate base additions for its second Certificate of Authority with the PSCW for approval 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). These projects are expected to be placed in-service in 2022-2024. The 1,089 MW of new solar generation would replace energy and capacity being eliminated with the planned retirement of the coal-fired Edgewater Generating Station (414 MW) by the end of 2022, and Columbia Unit 1 by the end of 2023 and Columbia Unit 2 by the end of 2024 (595 MW in aggregate), which are the last coal-fired EGUs at WPL. The retirement of these coal-fired EGUs supports Alliant Energy’s strategy, which is focused on meeting its customers’ energy needs in an economical, efficient and sustainable manner. As a result of WPL’s neighboring utilities anticipated exercise of their options to purchase a partial ownership interest in West Riverside, WPL anticipates additional capacity needs by 2024, which may include additional solar generation and distributed energy resources such as community solar and energy storage systems.

IPL’s Solar Generation and Distributed Energy Resources - In November 2021, IPL filed for advance rate-making principles with the IUB 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. The advance rate-making principles filing included requests for a fixed cost cap of $1,575/kilowatt, including AFUDC and transmission upgrade costs among other costs, and a return on common equity of 11.40%, and proposes that a portion of the construction be financed by tax equity partners. In addition, the filing included a request that any costs incurred in excess of the cost cap be incorporated into rates if determined to be reasonable and prudent. The 400 MW of new solar generation and 75 MW of battery storage would help replace a portion of the energy and capacity expected to be eliminated with the planned retirement of the coal-fired Lansing Generating Station (275 MW) by the end of 2022 and the expected reduction of energy and capacity resulting from the planned fuel switch of the Burlington Generating Station (212 MW) from coal to natural gas by the end of 2021. In addition, IPL’s plans include additional distributed energy resources, including community solar and energy storage systems, to add energy and capacity.

LIQUIDITY AND CAPITAL RESOURCES

The liquidity and capital resources summary included in the 2020 Form 10-K has not changed materially, except as described below.

Liquidity Position - At ~~March 31,~~September 30, 2021, Alliant Energy had ~~$14~~$20 million of cash and cash equivalents, ~~$664~~$684 million ($~~262~~187 million at the parent company, ~~$250~~$100 million at IPL and ~~$152~~$397 million at WPL) of available capacity under the single revolving credit facility and ~~$15~~$60 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, 2021 were as follows (Long-term Debt (including current maturities) (LD); Short-term Debt (SD); Common Equity (CE); IPL’s Preferred Stock (PS)):

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


		Alliant Energy		IPL		WPL			Alliant Energy		IPL		WPL
		2021	2020	2021	2020	2021	2020		2021	2020	2021	2020	2021	2020
Cash, cash equivalents and restricted cash, January 1	Cash, cash equivalents and restricted cash, January 1	$56	$18	$50	$9	$3	$4	Cash, cash equivalents and restricted cash, January 1	$56	$18	$50	$9	$3	$4
Cash flows from (used for):	Cash flows from (used for):							Cash flows from (used for):
Operating activities	Operating activities	145	160	(45)	25	148	148	Operating activities	477	436	95	19	349	402
Investing activities	Investing activities	(38)	(179)	98	(53)	(119)	(124)	Investing activities	(452)	(679)	122	(202)	(510)	(465)
Financing activities	Financing activities	(145)	60	(92)	44	(30)	(5)	Financing activities	(57)	419	(254)	359	162	61
Net increase (decrease)	Net increase (decrease)	(38)	41	(39)	16	(1)	19	Net increase (decrease)	(32)	176	(37)	176	1	(2)
Cash, cash equivalents and restricted cash, March 31		$18	$59	$11	$25	$2	$23
Cash, cash equivalents and restricted cash, September 30								Cash, cash equivalents and restricted cash, September 30	$24	$194	$13	$185	$4	$2

Operating Activities - The following items contributed to increased (decreased) operating activity cash flows for the ~~three~~nine months ended ~~March 31,~~September 30, 2021 compared to the same period in 2020 (in millions):

Alliant Energy IPL WPL
Higher natural gas cost payments from extreme temperatures in February 2021 resulting in under-recovered natural gas costs at IPL (Refer to Note 2)
($20) ($20) $—
Changes in credits issued to IPL’s retail electric customers through its tax benefit rider related to excess deferred income taxes amortization (7) (7) —
Increased collections from IPL’s and WPL’s retail customers caused by temperature impacts on electric and gas sales 14 9 5
Higher collections from IPL’s increasing base rate 10 10 —
Timing of intercompany payments and receipts — (56) (15)
Other (primarily due to other changes in working capital) (12) (6) 10
($15) ($70) $—


	Alliant Energy	IPL	WPL
DAEC PPA amendment buyout payment in 2020	$110	$110	$—
Credits issued to IPL’s retail electric customers in 2020 through its transmission cost rider for amounts previously collected in rates	42	42	—
Increased collections from IPL’s and WPL’s retail customers caused by temperature impacts on electric and gas sales	22	15	7
Changes in the sales of accounts receivable at IPL	(68)	(68)	—
Refunds received in 2020 related to the MISO transmission owner return on equity complaint FERC orders	(20)	(15)	(5)
Higher natural gas cost payments primarily from extreme temperatures in February 2021 resulting in under-recovered natural gas costs at IPL (Refer to Note 2)	(15)	(15)	—
Credits issued to IPL’s retail electric customers in 2021 through its transmission cost rider for refunds received in 2020 for the MISO transmission owner return on equity complaints	(14)	(14)	—
Changes in income taxes paid/refunded	(7)	40	(29)









Other (primarily due to other changes in working capital)	(9)	(19)	(26)
	$41	$76	($53)

Investing Activities - The following items contributed to increased (decreased) investing activity cash flows for the ~~three~~nine months ended ~~March 31,~~September 30, 2021 compared to the same period in 2020 (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)	$163	$180	($17)
Changes in the amount of cash receipts on sold receivables	Changes in the amount of cash receipts on sold receivables	$86	$86	$—	Changes in the amount of cash receipts on sold receivables	105	105	—

Lower utility construction and acquisition expenditures (a)		64	59	5
Refund from ATC in 2020 for construction deposits WPL previously provided to ATC for transmission network upgrades for West Riverside					Refund from ATC in 2020 for construction deposits WPL previously provided to ATC for transmission network upgrades for West Riverside	(42)	—	(42)
Other	Other	(9)	6	—	Other	1	39	14
		$141	$151	$5		$227	$324	($45)

(a)Largely due to lower expenditures for IPL’s and WPL’s expansion of wind generation, IPL’s and WPL’s electric and gas distribution systems and WPL’s West Riverside Energy Center, partially offset by higher expenditures for WPL’s solar generation.


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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 2021 through 2025 are currently anticipated as follows (in millions), and are focused on the transition to cleaner energy and strengthening the resiliency of Alliant Energy’s, 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. Such estimates do not reflect the assumption that a portion of the construction is expected to be financed by tax equity partners, as discussed below in “IPL and WPL Solar Project Tax Equity Credits.” Refer to "Custo me r Investments" for further discussion of certain key projects impacting construction and acquisition plans related to the utility business.


	Alliant Energy					IPL					WPL
	2021	2022	2023	2024	2025	2021	2022	2023	2024	2025	2021	2022	2023	2024	2025
Generation:
Renewable projects	$385	$550	$520	$1,270	$675	$20	$80	$200	$510	$340	$365	$470	$320	$760	$335
Other	90	105	185	190	90	55	65	150	140	45	35	40	35	50	45
Distribution:
Electric systems	490	445	560	605	625	265	210	300	340	350	225	235	260	265	275
Gas systems	70	70	80	70	75	35	35	40	35	35	35	35	40	35	40
Other	165	185	185	185	205	25	30	30	35	40	20	25	25	35	30
	$1,200	$1,355	$1,530	$2,320	$1,670	$400	$420	$720	$1,060	$810	$680	$805	$680	$1,145	$725

Financing Activities - The following items contributed to increased (decreased) financing activity cash flows for the ~~three~~nine months ended ~~March 31,~~September 30, 2021 compared to the same period in 2020 (in millions):


		Alliant Energy	IPL	WPL		Alliant Energy	IPL	WPL
Lower net proceeds from issuance of long-term debt	Lower net proceeds from issuance of long-term debt	($300)	$—	$—	Lower net proceeds from issuance of long-term debt	($750)	($400)	($50)
Lower net proceeds from common stock issuances	Lower net proceeds from common stock issuances	(220)	—	—	Lower net proceeds from common stock issuances	(219)	—	—
Lower (higher) common stock dividends		(9)	(41)	1
Net changes in the amount of commercial paper outstanding					Net changes in the amount of commercial paper outstanding	(158)	—	(225)
(Higher) lower common stock dividends					(Higher) lower common stock dividends	(23)	(124)	1
Lower payments to retire long-term debt	Lower payments to retire long-term debt	300	—	—	Lower payments to retire long-term debt	650	200	150
Net changes in the amount of commercial paper and other short-term borrowings outstanding		14	—	(123)
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	—	(100)	100	Higher (lower) capital contributions from IPL’s and WPL’s parent company, Alliant Energy	—	(295)	220
Other	Other	10	5	(3)	Other	24	6	5
		($205)	($136)	($25)		($476)	($613)	$101

IPL and WPL Solar Project Tax Equity Credits - IPL and WPL each propose to own and operate their planned solar projects discussed in “Customer Investments,” which are currently expected to qualify for 26% to 30% investment tax credits, through a tax equity partnership, with approximately 25% to 45% of the construction costs financed with capital from the tax equity partner. Assuming a portion of the construction costs are financed by the tax equity partner, IPL would receive approximately $25 million in 2023 and $260 million in 2024 from the tax equity partner, and WPL would receive approximately $190 million in 2022, $100 million in 2023, $320 million in 2024 and $170 million in 2025 from the tax equity partner. IPL and WPL would expect to include their portion of capital expenditures, less the amounts financed by the tax equity partner, in their respective rate base.

Common Stock Issuances and Common Stock Dividends - Refer to Note 5 for discussion of common stock issuances by Alliant Energy in 2021. Refer to “Results of Operations” for discussion of expected common stock dividends in 2022.

Short- and Long-term Debt - Refer to Note 7 (a) for discussion of changes to Alliant Energy's, IPL's and WPL's credit facility capacity amounts in the third quarter of 2021. Refer to Note 7 (b) for discussion of WPL’s issuance of long-term debt in 2021. Refer to “Results of Oper ation s” for discussion of expected future issuances and retirements of long-term debt by the end of 2022.

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 2020 Form 10-K and has not changed materially from the items reported in the 2020 Form 10-K, except for the items described in Notes 3, 7 and 121 4.


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Table of Contents

OTHER MATTERS

Critical Accounting Policies and Estimates - The summary of critical accounting policies and estimates included in the 2020 Form 10-K has not changed materially, except as described below.

Long-Lived Assets -

Regulated Operations -

Generating Units Subject to Early Retirement - Refer to Note 1(b) for discussion of the anticipated retirement of Columbia Unit 1 by the end of 2023 and Columbia Unit 2 by the end of 2024, and Alliant Energy’s and WPL’s conclusion that these EGUs met the criteria to be considered probable of abandonment and no disallowance was required as of September 30, 2021.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Quantitative and Qualitative Disclosures About Market Risk are reported in the 2020 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) as of ~~March 31,~~September 30, 2021 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, 2021.

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, 2021 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. ~~Securities and Exchange Commission~~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 ~~Securities and Exchange Commission~~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 2020 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, 2021 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 4,432 $49.35 — N/A
February 1 through February 28 3,161 47.85 — N/A
March 1 through March 31 484 48.77 — N/A
8,077 48.73 —


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~~Table of Contents~~

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

3,753

$56.78

—

N/A

August 1 through August 31

2,526

61.64

—

N/A

September 1 through September 30

59.59

—

N/A

6,351

58.74

—

(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.


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Table of Contents

ITEM 6. EXHIBITS

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


Exhibit Number			Description
3.1			Amended and Restated Bylaws of Alliant Energy , effective September 23, 2021 (incorporated by refere nce to Exhibit 3.1 to All iant Energy ’s Form 8-K, filed September 24, 2021 (File No. 1-9894))
4.1			First Supplemental Indenture, dated September 16, 2021, among WPL, Wells Fargo Bank, National Association, as Original Trustee, and U.S. Bank National Association, as Series Trustee (incorporated by reference to Exhibit 4.1 to WPL's Form 8-K, filed September 16, 2021 (File No. 0-337))
10.1#			Form of Key Executive Employment and Severance Agreement (KEESA), by and between Alliant Energy and J.O. Larsen (incorporated by reference to Exhibit 10.1 to Alliant Energy’s Form 8-K, filed October 28 , 2021 (File No. 1-9894))
10.2#			Form of KEESA, by and between Alliant Energy and each of J.H. Gallegos, R.J. Durian, D.A. de Leon and T.L. Kouba (incorporated by reference to Exhibit 10.2 to Alliant Energy’s Form 8-K, filed October 28 , 2021 (File No. 1-9894))
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)

# A management contract or compensatory plan or arrangement.

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 ~~7th~~5th day of ~~May~~November 2021.


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)


			2835


	Alliant Energy	IPL	WPL



Higher natural gas cost payments from extreme temperatures in February 2021 resulting in under-recovered natural gas costs at IPL (Refer to Note 2)	($20)	($20)	$—
Changes in credits issued to IPL’s retail electric customers through its tax benefit rider related to excess deferred income taxes amortization	(7)	(7)	—
Increased collections from IPL’s and WPL’s retail customers caused by temperature impacts on electric and gas sales	14	9	5

Higher collections from IPL’s increasing base rate	10	10	—






Timing of intercompany payments and receipts	—	(56)	(15)

Other (primarily due to other changes in working capital)	(12)	(6)	10
	($15)	($70)	$—