Type	Name	Date
Credit agreement	CREDIT AGREEMENT	09/04/2020
Credit agreement	Third Amended and Restated Credit Agreement	12/16/2016
Underwriting agreement	Underwriting Agreement, among NorthWestern Corporation and Credit Suisse Securities (USA) LLC and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as representatives of the Underwriters named therein	11/12/2014
Underwriting agreement	Underwriting Agreement, among NorthWestern Corporation and Credit Suisse Securities (USA) LLC and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as representatives of the Underwriters named therein	11/10/2014
Credit agreement	Senior Bridge Credit Agreement	11/18/2013
Credit agreement	Second Amended and Restated Credit Agreement	11/08/2013

Type	Name	Date
By-Laws	Amended and Restated Bylaws of NorthWestern Corporation	05/18/2016
By-Laws	Amended and Restated Bylaws of NorthWestern Corporation	10/31/2011
By-Laws	Amended and Restated Bylaws of NorthWestern Corporation	11/01/2010

Type	Name	Date
Summary of incentive plan	2023 ANNUAL INCENTIVE PLAN	12/19/2022
Summary of incentive plan	2022 ANNUAL INCENTIVE PLAN	12/20/2021
Summary of incentive plan	2021 ANNUAL INCENTIVE PLAN	12/30/2020
Summary of incentive plan	2019 ANNUAL INCENTIVE PLAN	12/19/2018
Summary of incentive plan	2017 Annual Incentive Plan	12/13/2016
Summary of incentive plan	2016 Annual Incentive Plan	02/16/2016
Summary of incentive plan	NorthWestern Energy 2015 Annual Incentive Plan	12/22/2014
Summary of incentive plan	NorthWestern Energy 2014 Annual Incentive Plan	12/16/2013
Summary of incentive plan	NorthWestern Energy 2013 Annual Incentive Plan	12/18/2012
Summary of incentive plan	EX. 99-1 2012 ANNUAL INCENTIVE PLAN	12/09/2011
Summary of incentive plan	NorthWestern Energy 2011 Annual Incentive Plan	02/16/2011