Alliant Energy Announces First Quarter 2026 Results

About this update from Alliant Energy Corporation

MADISON, Wis., April 30, 2026 --( BUSINESS WIRE )--Alliant Energy Corporation (NASDAQ: LNT) today announced U.S. generally accepted accounting principles (GAAP) consolidated unaudited earnings per share (EPS) of $0.87 for first quarter 2026, compared to $0.83 for the first quarter of 2025. Ongoing EPS for first quarter 2026 was $0.82, compared to $0.83 for the first quarter of 2025. Alliant Energy reaffirmed its consolidated ongoing EPS guidance for 2026 of $3.36 - $3.46, continuing its over a decade strong track record of compound annual earnings growth of more than 6%. "We are off to a strong start in 2026, delivering approximately 25% of our ongoing earnings guidance midpoint, and reaffirming our full-year ongoing EPS outlook," said Lisa Barton, Alliant Energy President and CEO. "Our results reflect disciplined execution and continued momentum in data center growth, including the signing of a new electric service agreement in Iowa for approximately 370 megawatts of contracted demand. With five executed agreements, we are translating customer demand into well-structured, long-term growth that benefits investors, existing customers and communities." In 2026, the primary drivers of Alliant Energy’s results were higher revenue requirements from increasing rate base at IPL and WPL of $0.05 and $0.10 per share, respectively, including investments in generation and energy storage, non-GAAP adjustments in 2026, and higher allowance for funds used during construction. These items were offset by higher financing and depreciation expense related to capital investments, as well as other operating and maintenance expense primarily due to increased electric distribution and generation costs from planned maintenance activities and the addition of new energy resources. Retail electric and gas sales decreased an estimated $0.04 and $0.03 per share in 2026 and 2025, respectively, due to impacts of temperatures on customer demand. Alliant Energy’s Non-GAAP, or ongoing, EPS for 2026 excludes $0.05 per share benefit related to the remeasurement of deferred tax assets, reflecting a remeasurement of estimated state income tax apportionment. In the third quarter of 2025, WPL entered into an electric service agreement with a customer who expected to build a data center in WPL’s service territory. In the first quarter of 2026, the customer selected an alternative data center location in IPL’s service territory, and as a result, the electric service agreement with WPL was terminated and subsequently renegotiated and executed with IPL. This non-GAAP adjustment is presented to supplement GAAP results and highlight financial measures not typically associated with ongoing operations. 2026 Earnings Guidance Alliant Energy is reaffirming its consolidated ongoing EPS guidance for 2026 of $3.36 - $3.46 per diluted share. Assumptions for Alliant Energy’s 2026 EPS guidance include, but are not limited to: The 2026 earnings guidance does not include the impacts of any material non-cash valuation adjustments, regulatory-related charges or credits, reorganizations or restructurings, future changes in laws, regulations or regulatory policies, adjustments made to deferred tax assets and liabilities from changes in forecasted state income tax apportionment and valuation allowances including further corporate tax rate changes in Iowa, changes in credit loss liabilities related to guarantees, pending lawsuits and disputes, settlement charges related to pension and other postretirement benefits plans, federal and state income tax audits and other Internal Revenue Service proceedings, impacts from changes to the authorized return on equity for ATC LLC, or changes in GAAP and tax methods of accounting that may impact the reported results of Alliant Energy. Earnings Conference Call A conference call to review the 2026 results is scheduled for Friday, May 1, 2026 at 9 a.m. central time. Alliant Energy President and Chief Executive Officer Lisa Barton, and Executive Vice President and Chief Financial Officer Robert Durian will host the call. The conference call is open to the public and can be accessed in two ways. Interested parties may listen to the call by dialing 800-715-9871 (Toll-Free) or 646-307-1963 (International), conference ID 9124041. Interested parties may also listen to a webcast at www.alliantenergy.com/investors . In conjunction with the information in this earnings announcement and the conference call, Alliant Energy posted supplemental materials on its website. An archive of the webcast will be available on the Company’s website at www.alliantenergy.com/investors for 12 months. About Alliant Energy Corporation Alliant Energy is the parent company of two public utility companies - Interstate Power and Light Company and Wisconsin Power and Light Company - and of Alliant Energy Finance, LLC, the parent company of Alliant Energy’s non-utility operations. Alliant Energy, whose core purpose is to serve customers and build stronger communities, is an energy-services provider with utility subsidiaries serving approximately 1,010,000 electric and 435,000 natural gas customers. Providing its customers in the Midwest with regulated electricity and natural gas service is the Company’s primary focus. Alliant Energy, headquartered in Madison, Wisconsin, is a component of the S&P 500 and is traded on the Nasdaq Global Select Market under the symbol LNT. For more information, visit the Company’s website at www.alliantenergy.com . Forward-Looking Statements This press release includes forward-looking statements. These forward-looking statements can be identified by words such as "forecast," "expect," "guidance," 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. Actual results could be materially affected by the following factors, among others: For more information about potential factors that could affect Alliant Energy’s business and financial results, refer to Alliant Energy’s most recent Annual Report on Form 10-K filed with the Securities and Exchange Commission (SEC), including the section therein titled "Risk Factors," and its other filings with the SEC. Without limitation, the expectations with respect to 2026 earnings guidance in this press release are forward-looking statements and are based in part on certain assumptions made by Alliant Energy, some of which are referred to in the forward-looking statements. Alliant Energy cannot provide any assurance that the assumptions referred to in the forward-looking statements or otherwise are accurate or will prove to be correct. Any assumptions that are inaccurate or do not prove to be correct could have a material adverse effect on Alliant Energy’s ability to achieve the estimates or other targets included in the forward-looking statements. The forward-looking statements included herein are made as of the date hereof and, except as required by law, Alliant Energy undertakes no obligation to update publicly such statements to reflect subsequent events or circumstances. Use of Non-GAAP Financial Measures To provide investors with additional information regarding Alliant Energy’s financial results, this press release includes reference to certain non-GAAP financial measures. These measures include income and EPS for the three months ended March 31, 2026 excluding the state income tax apportionment benefit at the Parent. Alliant Energy believes these non-GAAP financial measures are useful to investors because they provide an alternate measure to better understand and compare across periods the operating performance of Alliant Energy without the distortion of items that management believes are not normally associated with ongoing operations, and also provides 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. Alliant Energy’s management also uses income, as adjusted, to determine performance-based compensation. In addition, Alliant Energy included in this press release IPL; WPL; Corporate Services; Utilities and Corporate Services; ATC Holdings; and Non-utility and Parent EPS for the three months ended March 31, 2026 and 2025. 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. Reconciliation of the non-GAAP financial measures included in this press release to the most directly comparable GAAP financial measures are included in the earnings summaries that follow. Note: Unless otherwise noted, all "per share" references in this release refer to earnings per diluted share.   View source version on businesswire.com: https://www.businesswire.com/news/home/20260430398096/en/ Contacts Contacts Investors Susan Gille (608) 458-3956 [email protected] Media Hotline (608) 458-4040

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