WISCONSIN POWER AND LIGHT COMPANY (a Wisconsin corporation) 3.05% DEBENTURES DUE 2027 UNDERWRITING AGREEMENT Dated: October 2, 2017Underwriting Agreement • October 10th, 2017 • Alliant Energy Corp • Electric & other services combined • New York
Wisconsin Power and Light Company, a Wisconsin corporation (the “Company”), confirms its agreement with Goldman Sachs & Co. LLC, J.P. Morgan Securities LLC and Merrill Lynch, Pierce, Fenner & Smith Incorporated, and each of the other underwriters named in Schedule A hereto (collectively, the “Underwriters,” which term shall also include any underwriter substituted as hereinafter provided in Section 10 hereof), for whom Goldman Sachs & Co. LLC, J.P. Morgan Securities LLC and Merrill Lynch, Pierce, Fenner & Smith Incorporated are acting as representatives (in such capacity, the “Representatives”), with respect to the issue and sale by the Company and the purchase by the Underwriters, acting severally and not jointly, of the respective principal amounts set forth on Schedule A of $300,000,000 aggregate principal amount of the Company’s 3.05% Debentures due 2027 (the “Securities”). The Securities will be issued pursuant to an indenture dated as of June 20, 1997 (the “Base Indenture”) betwe
