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 20, 2024, relating to the financial statements and supplemental schedule of the Alliant Energy Corporation 401(k) Savings Plan appearing in this Annual Report on Form 11-K of the Alliant Energy Corporation 401(k) Savings Plan for the year ended December 31, 2023.
/s/ DELOITTE & TOUCHE LLP
Milwaukee, WI
June 20, 2024
