Alliant Energy prices $725M of 5.750% junior subordinated notes due 2056

ALLIANT ENERGY CORP

$725M principal of 5.750% junior subordinated notes due Apr 1, 2056 priced.
Net proceeds to reduce commercial paper, retire long-term debt, or general corporate purposes.
Closing expected Sept 26, 2025, subject to customary conditions.
Underwriters: BofA, MUFG, Barclays, Goldman Sachs, J.P. Morgan, Mizuho, Wells Fargo.
Notes are Fixed-to-Fixed Reset Rate junior subordinated; registered under shelf S-3.

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