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, 2024 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 Identific ...

Cautionary Statements 2024 Q1 Earnings Call Alliant Energy: Proven Success Unlocking Growth, Reliability & Customer Value | --- | --- | --- | --- | |-------|----------------------------------------------------------|-------|-------------------------------------------------------------| | | Strong Balance Sheet No material new equity \nrequired | | Over 3 GW of renewable resources | | | | | | | | Top tier reliability 27% of distribution is underground | | Strong economic development program to attract custom ...

Exhibit 99.1 Alliant Energy Corporation Corporate Headquarters 4902 North Biltmore Lane Madison, WI 53718-2148 www.alliantenergy.com News Release FOR IMMEDIATE RELEASE Media Hotline: (608) 458-4040 Investor Relations: Susan Gille (608) 458-3956 ALLIANT ENERGY ANNOUNCES FIRST QUARTER 2024 RESULTS MADISON, Wis. - May 2, 2024 - Alliant Energy Corporation (NASDAQ: LNT) today announced U.S. generally accepted accounting principles (GAAP) consolidated unaudited earnings per share (EPS) for the three months ended ...

Alliant Energy (LNT) is scheduled to release first-quarter 2024 results on May 2, after market close. The company delivered a negative earnings surprise of 12.7% in the last reported quarter.Let’s discuss the factors that are likely to be reflected in the upcoming quarterly results.Factors to ConsiderThe first quarter witnessed the start of electricity production from Alliant Energy's largest solar project in Iowa, which has a capacity of 4.5 megawatts (MW). A total of 50 MW of solar project in Iowa came on ...

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, 2023 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 ...

Alliant Energy Corporation 2023 Third Quarter Earnings Call November 3, 2023 2 2024 Earnings Drivers 2024 midpoint of $3.06 EPS represents 6% growth from 2023 adjusted guidance 2024 common stock dividend target represents a 6% growth from 2023 dividends • Higher depreciation expense • Higher financing costs 2024 Dividend Target: $1.92 6% growth over 2023 Forward-looking Statements The information regarding forecasted earnings per share, forecasted dividend levels, forecasted effective income tax rates, capi ...

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, 2023 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) Q2 2023 Results Conference Call August 4, 2023 10:00 AM ET Company Participants Susan Gille - Manager of IR John Larsen - Chairman and CEO Lisa Barton - President and COO Robert Durian - Executive VP and CFO Conference Call Participants Dariusz Lozny - Bank of America Alex Mortimer - Mizuho Securities James Kennedy - Guggenheim Operator Good morning, and welcome to Alliant Energy's Conference Call for Second Quarter 2023 Results. This call is being recorded for rebroa ...

Table of Contents 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 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, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ...

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 ...