Exhibit 23
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in Registration Statement Nos. 333-117654, 333-211148 and 333-230331 of Alliant Energy Corporation on Form S-8 of our report dated June 16, 2022, relating to the financial statements and supplemental schedule of the Alliant Energy Corporation 401(k) Savings Plan appearing in the Annual Report on Form 11-K of the Alliant Energy Corporation 401(k) Savings Plan for the year ended December 31, 2021.
/s/ DELOITTE & TOUCHE LLP
Milwaukee, WI
June 16, 2022
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