Core Insights - Alliant Energy reported quarterly earnings of $0.83 per share, exceeding the Zacks Consensus Estimate of $0.57 per share, and showing an increase from $0.62 per share a year ago, resulting in an earnings surprise of 45.61% [1] - The company generated revenues of $1.13 billion for the quarter ended March 2025, surpassing the Zacks Consensus Estimate by 0.17% and up from $1.03 billion year-over-year [2] - Alliant Energy's stock has increased approximately 4.5% since the beginning of the year, contrasting with a -4.3% decline in the S&P 500 [3] Earnings Outlook - The current consensus EPS estimate for the upcoming quarter is $0.58 on revenues of $1.02 billion, and for the current fiscal year, it is $3.22 on revenues of $4.29 billion [7] - The estimate revisions trend for Alliant Energy is mixed, leading to a Zacks Rank 3 (Hold), indicating expected performance in line with the market [6] Industry Context - The Utility - Electric Power industry is currently ranked in the top 22% of over 250 Zacks industries, suggesting a favorable outlook compared to lower-ranked industries [8] - Empirical research indicates a strong correlation between near-term stock movements and trends in earnings estimate revisions, which can be tracked by investors [5]

Q1 2025 Earnings Call Alliant Energy Corporation Cautionary Statements Forward-looking Statements The information regarding forecasted earnings per share, forecasted effective income tax rates, capital expenditure plans, financing plans and sources of funding, 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; s ...

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 2025 RESULTS MADISON, Wis. - May 8, 2025 - 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 ...

Core Viewpoint - Wall Street anticipates a year-over-year decline in earnings for Alliant Energy despite higher revenues, with a focus on how actual results compare to estimates impacting stock price [1][2]. Group 1: Earnings Expectations - Alliant Energy is expected to report quarterly earnings of $0.57 per share, reflecting an 8.1% decrease year-over-year [3]. - Revenue projections stand at $1.13 billion, indicating a 9.2% increase from the previous year [3]. Group 2: Estimate Revisions - The consensus EPS estimate has been revised down by 1.69% over the last 30 days, indicating a reassessment by analysts [4]. - A positive Earnings ESP of +9.88% suggests analysts have recently become more optimistic about Alliant Energy's earnings prospects [10][11]. Group 3: Earnings Surprise Prediction - The Zacks Earnings ESP model indicates that a positive reading is a strong predictor of an earnings beat, especially when combined with a Zacks Rank of 1, 2, or 3 [8]. - Alliant Energy's current Zacks Rank is 3, which, along with the positive Earnings ESP, suggests a likelihood of beating the consensus EPS estimate [11]. Group 4: Historical Performance - In the last reported quarter, Alliant Energy exceeded the expected earnings of $0.68 per share by delivering $0.70, resulting in a surprise of +2.94% [12]. - Over the past four quarters, the company has beaten consensus EPS estimates twice [13]. Group 5: Industry Context - NiSource, another player in the electric utility sector, is expected to report earnings of $0.90 per share, reflecting a 5.9% year-over-year increase, with revenues projected at $1.86 billion, up 8.9% [17]. - NiSource's consensus EPS estimate has been revised down by 4.2% over the last 30 days, and it currently has an Earnings ESP of 0.00%, making predictions about beating the consensus EPS estimate challenging [18].

Core Viewpoint - Alliant Energy (LNT) is set to release its first-quarter 2025 results on May 8, following a previous negative earnings surprise of 2.9% in the last quarter [1] Group 1: Factors Impacting Q1 Performance - The company placed two solar projects with a combined capacity of 200 megawatts (MW) into service during Q4 2024, along with the 50-MW Creston Solar Project, which is expected to power approximately 40,000 homes annually, likely boosting financial performance in Q1 [2] - An order from the IUC authorized annual base rate increases of $185 million for retail electric customers and $10 million for retail gas customers, effective from October 2024 through September 2025, which is expected to enhance revenue in the upcoming quarter [3] - Severe storms in March 2025 caused significant power outages and disruptions, potentially leading to higher operating expenses for restoration, which may offset some positive impacts on financial performance [4] Group 2: Q1 Expectations - The Zacks Consensus Estimate for earnings is 57 cents per share, reflecting a year-over-year decline of 8.1% [5] - The Zacks Consensus Estimate for revenues is $1.13 billion, indicating a year-over-year increase of 9.2% [5] - Total electricity delivered is estimated at 8,442.6 megawatt-hours (MWh), representing a 1.1% year-over-year increase [5] Group 3: Earnings Prediction - The company's Earnings ESP is +9.88%, suggesting a favorable outlook for an earnings beat this quarter [6] - Alliant Energy currently holds a Zacks Rank of 3, indicating a neutral outlook [7]

Core Insights - Alliant Energy (LNT) is positioned to potentially continue its earnings-beat streak in upcoming reports, particularly within the Zacks Utility - Electric Power industry [1] - The company has a history of beating earnings estimates, with an average surprise of 3.27% over the last two quarters [1] Earnings Performance - In the last reported quarter, Alliant Energy achieved earnings of $0.70 per share, surpassing the Zacks Consensus Estimate of $0.68 per share, resulting in a surprise of 2.94% [2] - In the previous quarter, the company reported earnings of $1.15 per share against an expected $1.11 per share, delivering a surprise of 3.60% [2] Earnings Estimates and Predictions - Estimates for Alliant Energy have been trending higher, influenced by its history of earnings surprises [5] - The stock currently has a positive Zacks Earnings ESP of +3.57%, indicating increased analyst optimism regarding its near-term earnings potential [8] - The combination of a positive Earnings ESP and a Zacks Rank 3 (Hold) suggests a strong possibility of another earnings beat [8] Statistical Insights - Research indicates that stocks with a positive Earnings ESP and a Zacks Rank of 3 or better have a nearly 70% chance of producing a positive surprise [6] - The Zacks Earnings ESP compares the Most Accurate Estimate to the Zacks Consensus Estimate, with the Most Accurate Estimate reflecting the latest analyst revisions [7]

Group 1 - The article discusses the impact of President Trump's potential tariff policies on market confidence, particularly regarding FirstEnergy Corporation (FE) [1] - The Low-Budget Dividend Investor is characterized as a Generation X individual seeking conservative, income-generating investment strategies [1] Group 2 - No relevant content available for this section [2][3]

Core Viewpoint - Alliant Energy Corporation (LNT) is focusing on systematic investments in natural gas projects and regulated assets, which are expected to enhance its bottom line while expanding its clean energy generation capabilities to serve a growing customer base [1][2]. Group 1: Investment Plans - Alliant Energy plans to invest approximately $10.9 billion from 2025 to 2028 to strengthen its electric and gas distribution network and expand its generation portfolio with natural gas and renewable assets [2]. - The company anticipates a 10% compound annual growth rate (CAGR) in its rate base during the same period, with over 40% of its capital expenditure dedicated to wind, solar, and energy storage investments [2]. Group 2: Earnings Prospects - The earnings outlook for Alliant Energy appears favorable due to increasing electric and natural gas customer volumes, supported by its geographic advantages and positive regulatory developments for wind projects [3]. - A diverse customer mix contributes to sales stability, reducing reliance on any single revenue source [3]. Group 3: Demand Drivers - Economic development within its service areas and a growing customer base are driving demand for utility services, which is expected to enhance the company's performance [4]. - Alliant Energy is targeting long-term annual earnings growth in the range of 5-7% without experiencing supply chain disruptions [4]. Group 4: Operational Challenges - Alliant Energy's utility operations rely on an interstate electric transmission system that it does not own, leading to potential risks if transmission costs increase and cannot be passed on to customers [5]. - A decline in the performance of third-party electric transmission systems could limit Alliant Energy's ability to transmit electricity effectively, negatively impacting operations [6]. Group 5: Industry Trends - The U.S. electric power industry is increasingly shifting towards cleaner energy sources, with many companies, including Alliant Energy, aiming to replace fossil fuels with renewable energy to meet zero-emission goals [7]. - Competitors like Xcel Energy, PPL Corp., and Dominion Energy are also making significant investments in renewable energy and infrastructure to capitalize on the expanding market [8][9][11].

Customer Base and Service - Alliant Energy serves approximately 1,000,000 electric and 430,000 natural gas customers in the Midwest through its subsidiaries IPL and WPL[27]. - As of December 31, 2024, IPL provided electric service to approximately 500,000 customers and natural gas service to about 230,000 customers in Iowa[28]. - WPL supplied electric service to around 500,000 customers and natural gas service to approximately 200,000 customers in Wisconsin as of December 31, 2024[29]. - The total number of retail customers increased to 1,002,967 at the end of 2024, up from 995,982 in 2023, reflecting a growth of approximately 0.1%[102]. - Retail customer count for IPL increased to 503,279 in 2024, up from 500,938 in 2023, representing a growth of 0.5%[104]. - Retail customer count for WPL increased to 499,688 in 2024, up from 495,044 in 2023, representing a growth of 0.5%[104]. Financial Performance - Alliant Energy's total revenues for 2024 were $3,372 million, a slight increase from $3,345 million in 2023[102]. - Total revenues for IPL in 2024 were $1,747 million, a decrease of 0.8% from $1,761 million in 2023[104]. - Total revenues for WPL in 2024 were $1,625 million, an increase of 2.6% from $1,584 million in 2023[104]. - The residential customer segment generated $1,236 million in revenue for 2024, compared to $1,220 million in 2023[102]. - Alliant Energy's consolidated net income for 2024 was $690 million, with diluted EPS of $2.69, compared to $703 million and $2.78 in 2023[186]. - The Utilities and Corporate Services segment reported a net income of $722 million in 2024, a slight decrease from $724 million in 2023, primarily due to asset valuation charges and higher expenses[186]. Regulatory Environment - The company is subject to various regulations, including the Public Utility Holding Company Act of 2005 and the Energy Policy Act of 2005, impacting its operations and financial reporting[48][49]. - WPL is subject to regulation by the PSCW for various operational matters, including retail utility rates and construction approvals[63]. - IPL's ownership and operation of electric generating units are subject to retail utility rate regulation by the IUC[58]. - The IUC authorized a $185 million annual base rate increase for IPL's retail electric customers effective October 1, 2024, which will be partially offset by credits for the first 12 months[194]. - WPL's retail electric and gas base rates will increase by $49 million and $13 million respectively, effective January 1, 2024, with an additional $60 million increase for electric customers effective January 1, 2025[224]. Renewable Energy and Sustainability - Alliant Energy's non-utility holdings include a 50% cash equity interest in a 225 MW wind farm in Oklahoma and a 347 MW natural gas-fired facility leased to WPL through 2044[32]. - IPL and WPL currently exceed their respective renewable energy standards requirements, primarily relying on wind and solar resources[80]. - Alliant Energy plans to construct and/or acquire additional renewable and natural gas resources to meet MISO's seasonal resource adequacy requirements[90]. - The company plans to develop or acquire approximately 1,200 MW of new wind and solar generation, 1,000 MW of energy storage, and refurbish 600 MW of existing wind farms over the next five years[183]. - Alliant Energy aims to achieve net-zero GHG emissions from its utility operations by 2050, with interim goals to reduce GHG emissions by 50% by 2030[213]. Safety and Compliance - Alliant Energy's safety culture emphasizes proactive management, with a focus on behavioral safety programs and compliance with safety rules[36][37]. - The company is subject to numerous environmental laws and regulations, which could impose additional costs and impact operations if compliance is not achieved[121]. - The Pipeline and Hazardous Materials Safety Administration has updated safety requirements for gas transmission pipelines, with remediation efforts expected to be completed by July 2035[218]. Operational Challenges - The company faces risks related to supply chain disruptions that could increase costs and delay construction projects[136]. - The company has experienced significant inflation, impacting costs for labor, materials, and services, which may not be fully recoverable in rates[148]. - Demand for energy may decrease due to economic conditions and technological advances, potentially leading to increased rates for remaining customers[129]. - Cybersecurity threats pose risks to operations, potentially leading to service disruptions and financial losses if systems are compromised[132]. - The company relies on third parties for software protection against cyber attacks, increasing vulnerability if these third parties are targeted[133]. Capital Expenditures and Investments - The company has forecasted capital expenditures of approximately $11 billion over the next four years[150]. - The company has entered into conditional commitments with the U.S. Department of Energy's Loan Programs Office for loan guarantees of approximately $3 billion in aggregate[150]. - Alliant Energy expects to issue up to $25 million of common stock in 2025 and IPL anticipates issuing up to $600 million of long-term debt[201]. - Estimated capital expenditures for technology projects from 2025 to 2028 are included in the "Other" line in the construction and acquisition expenditures table[219]. Customer Benefits and Tax Impacts - Alliant Energy's retail electric and gas customers in Iowa began receiving benefits from reduced corporate income tax rates effective October 1, 2024[183]. - The effective income tax rate is expected to decrease in 2025 compared to 2024 due to additional tax credits from renewable generation and energy storage projects[204]. - The Inflation Reduction Act of 2022 allows for the sale of renewable tax credits, but the inability to sell these credits at reasonable terms could materially impact financial results[124]. Future Outlook - The company expects an increase in cash flows from operating activities due to the transfer of renewable tax credits and higher earnings from an increasing rate base[204]. - Alliant Energy anticipates a decrease in other operation and maintenance expenses in 2025 compared to 2024, largely due to restructuring activities[204]. - The company is exploring growth opportunities in its non-utility business, Travero, which aims to be accretive to earnings and cash flows[219].

February 21, 2025 Q4 2024 Earnings Call Cautionary Statements Forward-looking Statements The information regarding forecasted earnings per share, forecasted dividend levels, forecasted effective income tax rates, 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 service territories of IPL and WPL; state and federal legislation and ...