Item 5. OTHER INFORMATION

On November 4, 2022, the Board of Directors of Alliant Energy Corporation (the “Company”) approved an amendment and restatement of the Amended and Restated Bylaws of the Company, effective November 8, 2022. The amendments update Section 3.14 related to notice of shareowner business and nomination of directors by conforming the bylaw provision to

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universal proxy rules promulgated by the SEC, requiring additional information be provided by shareowners utilizing the bylaw provision, and amending the deadline to submit proposals or nominees under the bylaws to not later than the close of business on the 90th day nor earlier than the close of business on the 120th day prior to the first anniversary of the preceding year’s annual meeting except in certain circumstances. The amendments also include certain technical and clarifying changes to the bylaws.

The foregoing summary is qualified in its entirety by reference to the copy of the Amended and Restated Bylaws of Alliant Energy filed as Exhibit 3.1 to this Quarterly Report on Form 10-Q and is incorporated by reference herein. A blackline of the Amended and Restated Bylaws against the prior version of the bylaws is filed herewith as Exhibit 3.2.