WISCONSIN POWER & LIGHT CO Contracts & Agreements

Wisconsin Power and Light Company OFFICERS CERTIFICATE Dated as of March 7, 2024 Setting Forth Terms of a Series of Debt Securities 5.375% Debentures due 2034 Pursuant to the... (Filed With SEC on March 7, 2024)

WISCONSIN POWER AND LIGHT COMPANY (a Wisconsin corporation) 5.375% DEBENTURES DUE 2034 UNDERWRITING AGREEMENT Dated: MARCH 4, 2024 TABLE OF CONTENTS (Filed With SEC on March 7, 2024)

Description of Common Stock of Alliant Energy (Filed With SEC on February 16, 2024)

Form of Performance Share Agreement pursuant to the 2020 OIP, amended in 2024 (Filed With SEC on February 16, 2024)

Terms of Alliant Energy Executive (Filed With SEC on February 16, 2024)

Form of Relocation Reimbursement Agreement (Filed With SEC on February 16, 2024)

Summary of Compensation and Benefits for Non-Employee Directors of Alliant Energy, IPL and WPL, effective January 1, 2024 (Filed With SEC on February 16, 2024)

Wisconsin Power and Light Company OFFICERS CERTIFICATE Dated as of March 30, 2023 Setting Forth Terms of a Series of Debt Securities 4.950% Debentures due 2033 Pursuant to the... (Filed With SEC on March 30, 2023)

WISCONSIN POWER AND LIGHT COMPANY (a Wisconsin corporation) 4.950% DEBENTURES DUE 2033 UNDERWRITING AGREEMENT Dated: MARCH 27, 2023 TABLE OF CONTENTS (Filed With SEC on March 30, 2023)

Summary of Compensation and Benefits for Non-Employee Directors of Alliant Energy, IPL and WPL, effective January 1 (Filed With SEC on February 24, 2023)

Form of Relocation Reimbursement Agreement (Filed With SEC on February 24, 2023)

Incremental Term Loan (Filed With SEC on February 24, 2023)

Amendment to the DCP, as amended and restated (Filed With SEC on February 24, 2023)

Form of Sign-On Bonus Reimbursement Agreement (Filed With SEC on February 24, 2023)

WISCONSIN POWER AND LIGHT COMPANY (a Wisconsin corporation) 3.950% DEBENTURES DUE 2032 UNDERWRITING AGREEMENT Dated: AUGUST 8, 2022 TABLE OF CONTENTS (Filed With SEC on August 15, 2022)

Wisconsin Power and Light Company OFFICERS CERTIFICATE Dated as of August 15, 2022 Setting Forth Terms of a Series of Debt Securities 3.950% Debentures due 2032 Pursuant to the... (Filed With SEC on August 15, 2022)

Form of Restricted Stock Unit Agreement pursuant to the 2020 OIP, amended in 2022 (Filed With SEC on February 18, 2022)

Summary of Compensation and Benefits for Non-Employee Directors of Alliant Energy, IPL and WPL, effective January 1, 202 (Filed With SEC on February 18, 2022)

Form of Performance Restricted Stock Unit Agreement (Net Income Metric) pursuant to the 2020 OIP, amended in 2022 (Filed With SEC on February 18, 2022)

Form of Performance Restricted Stock Unit Agreement (Diversity Metric) pursuant to the 2020 OIP, amended in 2022 (Filed With SEC on February 18, 2022)

Form of Performance Share Agreement pursuant to the 2020 OIP, amended in 2022 (Filed With SEC on February 18, 2022)

$1,000,000,000 AMENDED AND RESTATED FIVE YEAR MASTER CREDIT AGREEMENT Dated as of December 17, 2021 among ALLIANT ENERGY CORPORATION, INTERSTATE POWER AND LIGHT COMPANY, and... (Filed With SEC on December 21, 2021)

WISCONSIN POWER AND LIGHT COMPANY as Issuer and WELLS FARGO BANK, NATIONAL ASSOCIATION (as successor to Firstar Trust Company) as Original Trustee and U.S. BANK NATIONAL... (Filed With SEC on September 16, 2021)

WISCONSIN POWER AND LIGHT COMPANY (a Wisconsin corporation) 1.950% DEBENTURES DUE 2031 UNDERWRITING AGREEMENT Dated: September13, 2021 TABLE OF CONTENTS (Filed With SEC on September 16, 2021)

Summary of Compensation and Benefits for Non-Employee Directors of Alliant Energy, IPL and WPL, effective January 1, 202 (Filed With SEC on February 19, 2021)

Form of Restricted Stock Unit Agreement pursuant to the Alliant Energy 2020 Omnibus Incentive Plan (Filed With SEC on August 10, 2020)

Form of Performance Share Agreement pursuant to the Alliant Energy 2020 Omnibus Incentive Plan (Filed With SEC on August 10, 2020)

Form of Performance Restricted Stock Unit Agreement pursuant to the Alliant Energy 2020 Omnibus Incentive Plan (Filed With SEC on August 10, 2020)

Executive Officer Severance Benefit Plan, as amended and restated, effective October 29, 2018 (Filed With SEC on November 7, 2018)

Summary of Compensation and Benefits for Non-Employee Directors of Alliant Energy, IPL and WPL, effective January 1, 2018 (Filed With SEC on February 23, 2018)

Officers Certificate creating the 3.05% Debentures due 2027 of Wisconsin Power and Light Company (Filed With SEC on October 10, 2017)

Underwriting Agreement, dated October 2, 2014, among Wisconsin Power and Light Company and the underwriters named therein (Filed With SEC on October 10, 2017)

Five-Year Master Credit Agreement, dated as of August 16, 2017, among Alliant Energy Corporation, Interstate Power and Light Company, Wisconsin Power and Light Company, Wells... (Filed With SEC on August 21, 2017)

ALLIANT ENERGY CORPORATION INTERSTATE POWER AND LIGHT COMPANY WISCONSIN POWER AND LIGHT COMPANY Summary of Compensation and Benefits for Non-Employee Directors Effective January1,... (Filed With SEC on February 24, 2017)

ALLIANT ENERGY CORPORATION AMENDED AND RESTATED 2012 DIRECTOR LONG TERM INCENTIVE PLAN SECTION 1. PURPOSE (Filed With SEC on February 24, 2017)

ALLIANT ENERGY CORPORATION DIRECTOR PERFORMANCE UNIT AGREEMENT (Filed With SEC on February 24, 2017)

ALLIANT ENERGY CORPORATION DIRECTOR PERFORMANCE RESTRICTED UNIT AGREEMENT (Filed With SEC on February 24, 2017)

ALLIANT ENERGY CORPORATION DIRECTOR RESTRICTED UNIT AGREEMENT (Filed With SEC on February 24, 2017)

FORM OF ALLIANT ENERGY CORPORATION PERFORMANCE SHARE AGREEMENT (Filed With SEC on February 24, 2016)

FORM OF ALLIANT ENERGY CORPORATION RESTRICTED STOCK UNIT AGREEMENT (Filed With SEC on February 24, 2016)

FORM OF ALLIANT ENERGY CORPORATION PERFORMANCE RESTRICTED STOCK UNIT AGREEMENT (Filed With SEC on February 24, 2016)

AMENDMENT TO THE IES INDUSTRIES INC. AMENDED AND RESTATED KEY EMPLOYEE DEFERRED COMPENSATION AGREEMENT (Filed With SEC on February 24, 2016)

ALLIANT ENERGY CORPORATION 20__ EXECUTIVE PERFORMANCE PAY PLAN (Filed With SEC on February 24, 2016)

ALLIANT ENERGY CORPORATION INTERSTATE POWER AND LIGHT COMPANY WISCONSIN POWER AND LIGHT COMPANY Summary of Compensation and Benefits for Non-Employee Directors Effective January... (Filed With SEC on February 24, 2016)

FORM OF AMENDMENT NO. [ ] TO KEY EXECUTIVE EMPLOYMENT AND SEVERANCE AGREEMENT (Filed With SEC on November 6, 2015)

AMENDMENT TO THE ALLIANT ENERGY RABBI TRUST AGREEMENT (Filed With SEC on August 6, 2015)

SECOND AMENDMENT TO THE ALLIANT ENERGY RABBI TRUST AGREEMENT OF ALLIANT ENERGY CORPORATION (Filed With SEC on August 6, 2015)

FORM OF KEY EXECUTIVE EMPLOYMENT AND SEVERANCE AGREEMENT [FOR R.J. DURIAN] (Filed With SEC on February 25, 2015)

FORM OF ALLIANT ENERGY CORPORATION PERFORMANCE CONTINGENT RESTRICTED STOCK AGREEMENT (Filed With SEC on February 25, 2015)

Terms of ALLIANT ENERGY CORPORATION 20__ MANAGEMENT PERFORMANCE PAY PLAN (Filed With SEC on February 25, 2015)

ALLIANT ENERGY CORPORATION INTERSTATE POWER AND LIGHT COMPANY WISCONSIN POWER AND LIGHT COMPANY Summary of Compensation and Benefits for Non-Employee Directors Effective January... (Filed With SEC on February 25, 2015)

FORM OF ALLIANT ENERGY CORPORATION PERFORMANCE SHARE AGREEMENT (Filed With SEC on February 25, 2015)

WISCONSIN POWER AND LIGHT COMPANY (a Wisconsin corporation) 4.10%DEBENTURES DUE 2044 UNDERWRITING AGREEMENT Dated: October 6, 2014 TABLE OF CONTENTS (Filed With SEC on October 14, 2014)

Wisconsin Power and Light Company OFFICERS CERTIFICATE Dated as of October 14, 2014 Setting ForthTerms of a Series of Debt Securities 4.10% Debentures due 2044 Pursuant to the... (Filed With SEC on October 14, 2014)

ALLIANT ENERGY CORPORATION Executive Employee Reimbursement Agreement (Filed With SEC on February 25, 2014)

ALLIANT ENERGY CORPORATION INTERSTATE POWER AND LIGHT COMPANY WISCONSIN POWER AND LIGHT COMPANY Summary of Compensation and Benefits for Non-Employee Directors Effective January... (Filed With SEC on February 25, 2014)

ALLIANT ENERGY CORPORATION INTERSTATE POWER AND LIGHT COMPANY WISCONSIN POWER AND LIGHT COMPANY Summary of Compensation and Benefits for Non-Employee Directors Effective January... (Filed With SEC on February 26, 2013)

WISCONSIN POWER AND LIGHT COMPANY (a Wisconsin corporation) 2.25% DEBENTURES DUE 2022 UNDERWRITING AGREEMENT Dated: November 14, 2012 TABLE OF CONTENTS (Filed With SEC on November 19, 2012)

WISCONSIN POWER AND LIGHT COMPANY OFFICERS CERTIFICATE Dated as of November 19, 2012 Setting Forth Terms of a Series of Debt Securities 2.25% Debentures due 2022 Pursuant tothe... (Filed With SEC on November 19, 2012)

ALLIANT ENERGY CORPORATION INTERSTATE POWER AND LIGHT COMPANY WISCONSIN POWER AND LIGHT COMPANY Summary of Compensation and Benefits for Non-Employee Directors Effective January... (Filed With SEC on February 27, 2012)

FORM OF ALLIANT ENERGY CORPORATION PERFORMANCE SHAREAGREEMENT (Filed With SEC on February 27, 2012)

FORM OF ALLIANT ENERGY CORPORATION PERFORMANCE CONTINGENT RESTRICTEDSTOCK AGREEMENT (Filed With SEC on February 27, 2012)

FORM OF ALLIANT ENERGY CORPORATION RESTRICTED STOCK AGREEMENT (Filed With SEC on February 27, 2012)

ALLIANT ENERGY CORPORATION DIRECTOR LONG TERM INCENTIVE PLAN (Filed With SEC on February 27, 2012)

FORM OF ALLIANT ENERGY CORPORATION RESTRICTED CASH AGREEMENT (Filed With SEC on February 27, 2012)

FORM OF ALLIANT ENERGY CORPORATION PERFORMANCE RESTRICTEDAWARD AGREEMENT (Filed With SEC on February 27, 2012)

EXECUTIVE AGREEMENT (Filed With SEC on August 12, 2011)

AMENDMENT NO. 1 TO SUPPLEMENTAL RETIREMENT PLAN AGREEMENT (Filed With SEC on August 12, 2011)

FORM OF ALLIANT ENERGY CORPORATION RESTRICTED STOCK AGREEMENT (Filed With SEC on May 5, 2011)

ALLIANT ENERGY CORPORATION PERFORMANCE SHARE AGREEMENT (Filed With SEC on February 28, 2011)

ALLIANT ENERGY CORPORATION PERFORMANCE CONTINGENT RESTRICTED STOCKAGREEMENT (Filed With SEC on February 28, 2011)

ALLIANT ENERGY CORPORATION DIRECTOR LONG TERM INCENTIVE PLAN (Filed With SEC on February 28, 2011)

FORM OF ALLIANT ENERGY CORPORATION RESTRICTED CASH AGREEMENT (Filed With SEC on February 28, 2011)

FORM OF ALLIANT ENERGY CORPORATION PERFORMANCE RESTRICTED AWARD AGREEMENT (Filed With SEC on February 28, 2011)

ALLIANT ENERGY CORPORATION INTERSTATE POWER AND LIGHT COMPANY WISCONSIN POWER AND LIGHT COMPANY Summary of Compensation and Benefits for Non-Employee Directors Effective January... (Filed With SEC on February 28, 2011)

INTERSTATE POWER AND LIGHT COMPANY (an Iowa corporation) 3.30% SENIOR DEBENTURES DUE 2015 PURCHASE AGREEMENT Dated: June 10, 2010 TABLE OF CONTENTS (Filed With SEC on June 11, 2010)

WISCONSIN POWER AND LIGHT COMPANY (a Wisconsin corporation) 4.60% DEBENTURES DUE 2020 PURCHASE AGREEMENT Dated: June 10, 2010 TABLE OF CONTENTS (Filed With SEC on June 11, 2010)

INTERSTATE POWER AND LIGHT COMPANY OFFICERS CERTIFICATE Dated as of June 10, 2010 Setting ForthTerms of a Series of Debt Securities 3.30% Senior Debentures due 2015 Pursuant to... (Filed With SEC on June 11, 2010)

WISCONSIN POWER AND LIGHT COMPANY OFFICERS CERTIFICATE Dated as of June 10, 2010 Setting ForthTerms of a Series of Debt Securities 4.60% Debentures due 2020 Pursuant to the... (Filed With SEC on June 11, 2010)

ALLIANT ENERGY CORPORATION Special Incentive Agreement (Filed With SEC on June 4, 2010)

WISCONSIN POWER AND LIGHT COMPANY OFFICERS CERTIFICATE Dated as of July 7, 2009 Setting Forth Terms of aSeries of Debt Securities 5.00% Debentures due 2019 (Filed With SEC on July 8, 2009)

INTERSTATE POWER AND LIGHT COMPANY OFFICERS CERTIFICATE Dated as of July 7, 2009 Setting Forth Terms of aSeries of Debt Securities 6.25% Senior Debentures due 2039 (Filed With SEC on July 8, 2009)

WISCONSIN POWER AND LIGHT COMPANY (Filed With SEC on July 8, 2009)

INTERSTATE POWER AND LIGHT COMPANY (Filed With SEC on July 8, 2009)

WISCONSIN POWER AND LIGHT COMPANY OFFICERS CERTIFICATE (Filed With SEC on October 2, 2008)

INTERSTATE POWER AND LIGHT COMPANY OFFICERS CERTIFICATE (Filed With SEC on October 2, 2008)

(aWisconsin corporation) 7.60% DEBENTURES DUE 2038 PURCHASE AGREEMENT Dated: October 1, 2008 (Filed With SEC on October 2, 2008)

(an Iowacorporation) 7.25% SENIOR DEBENTURES DUE 2018 PURCHASE AGREEMENT Dated: October 1, 2008 (Filed With SEC on October 2, 2008)

TABLE OF CONTENTS Page SECTION 1. Representations and Warranties 3 (a) Representations and Warranties by the Company 3 (i) Registration Statement, Prospectus and Disclosure at... (Filed With SEC on August 9, 2007)

WISCONSIN POWER AND LIGHT COMPANY (Filed With SEC on August 9, 2007)

Five Year Credit Agreement (Filed With SEC on July 28, 2004)

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WISCONSIN POWER & LIGHT CO Contracts & Agreements