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 • First quarter GAAP earnings per share was $0.62 in 2024, compared to $0.65 in 2023 • Reaffirming 2024 earnings guidance range of $2.99 - $3.13 per share MADISON, Wis. - May 2, 2024 - Alliant Energy Corporation (NA ...

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 ...

Nicholas Campanella Robert Durian Yes, sure, Nick. So we've been very successful at the execution of bilateral agreements with the first round of tax credits we sold here in 2023. As we think about the future and we think about all the different opportunities we have to sell renewable tax credits, we do think we'll get up above $300 million once we get out to that 2025 time frame. When you think about the volume of wind production that we have right now, combined with the 1,500 megawatts of solar that Lisa ...

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 (NASDAQ:LNT) Q3 2023 Earnings Conference Call November 3, 2023 10:00 AM ET Susan Gille - Investor Relations Manager John Larsen - Chair and Chief Executive Officer Lisa Barton - President and Chief Operating Officer Robert Durian - Executive Vice President and Chief Financial Officer Nathan Richardson - Barclays Dariusz Lozny - Bank of America Ross Fowler - UBS Andrew Weisel - Scotiabank Alex Mortimer - Mizuho Securities Thank you for holding, and welcome to Alliant Energy's Third ...

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 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 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 ...

Susan Gille At the same time, we are building a more resilient energy network. Resilience and reliability are the foundation of our recently filed rate review in Wisconsin. For the fifth year in a row, we've made the Bloomberg Gender Equality Index. And once again, we were named to Newsweek's list of America's most trustworthy companies. Great recognition for our dedicated employees and the result of their work serving our customers and communities. We've been fortunate to build on the legacy of employees t ...