INDENTURE Dated as of June 12, 2018 Among ALLIANT ENERGY FINANCE, LLC, as Issuer, ALLIANT ENERGY CORPORATION, as Guarantor and THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as Trustee 3.750% SENIOR NOTES DUE 2023 4.250% SENIOR NOTES DUE 2028Indenture • June 12th, 2018 • Alliant Energy Corp • Electric & other services combined • New York
