Table of Contents 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, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to INTERSTATE POWER & LIGHT COMPANY (an Iowa corporation) Alliant Energy Tower Cedar Rapids, Iowa 52401 Telephone (319) 786-4411 Commission File Number ...

Alliant Energy Corporation (NASDAQ:LNT) Q4 2022 Earnings Conference Call February 24, 2023 10:00 AM ET Company Participants Susan Gille - IR Manager John Larsen - Chair, President and CEO Robert Durian - EVP and CFO Conference Call Participants Shahriar Pourreza - Guggenheim Partners Julien Dumoulin-Smith - Bank of America Nicholas Campanella - Credit Suisse Andrew Weisel - Scotiabank Alexander Mortimer - Mizuho Ashar Khan - Verition Operator Good morning, and welcome to Alliant Energy's Conference Call for ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 or ☐ 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 ...

Cautionary Statements Non-GAAP Financial Measures 2022 Accomplishments Dividend growth for the 20th consecutive year Advancing development of 1.5 GW of solar investments; Placed 250 MW of solar investments in service in 2022 On Forbes list of America's Best Midsize Employers for 4th consecutive year Consistent earnings growth Consistently achieving 5-7% earnings and dividends growth | --- | --- | --- | --- | --- | |--------------------------------------------------------------------------------------------- ...

Alliant Energy Corporation 2022 Third Quarter Earnings Call November 8, 2022 Cautionary Statements Forward-looking Statements The information regarding forecasted earnings per share, forecasted generation additions, forecasted effective income tax rates, capital expenditure plans, financing plans and regulatory plans contain forward-looking statements. Actual results could differ materially because the realization of those results is subject to many uncertainties, including: the state of the economy in the ...

Table of Contents 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 September 30, 2022 or ☐ 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 Ident ...

Alliant Energy Corporation (NASDAQ:LNT) Q3 2022 Earnings Conference Call November 8, 2022 10:00 AM ET Company Participants Susan Gille - IR Manager John Larsen - Chair, President and CEO Robert Durian - EVP and CFO Conference Call Participants Dariusz Lozny - Bank of America Michael Sullivan - Wolfe Research Nick Campanella - Credit Suisse Ashar Khan - Verition Operator Thank you for holding, ladies and gentlemen, and welcome to Alliant Energy's Third Quarter 2022 Earnings Conference Call. At this time, all ...

Alliant Energy Corporation 2022 Second Quarter Earnings Call August 5, 2022 Cautionary Statements Forward-looking Statements The information regarding forecasted earnings per share, new generation plans, and regulatory plans contain forward-looking statements. Actual results could differ materially because the realization of those results is subject to many uncertainties, including: the state of the economy in the service territories of IPL and WPL; state and federal legislation and regulatory actions; weat ...

Alliant Energy Corporation (NASDAQ:LNT) Q2 2022 Earnings Conference Call August 5, 2022 10:00 AM ET Company Participants Zach Fields – Investor Relations John Larsen – Chair, President and Chief Executive Officer Robert Durian – Executive Vice President and Chief Financial Officer Conference Call Participants Michael Sullivan – Wolfe Research Andrew Weisel – Scotiabank Operator Good morning, and welcome to Alliant Energy’s Conference Call for Second Quarter 2022 Results. This call is being recorded for rebr ...

Table of Contents 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 June 30, 2022 or ☐ 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 Identifica ...