NorthWestern Energy Group Inc. Watch

from 8-K 41 pages NorthWestern Corporation to the Bank of New York Mellon (Formerly the Bank of New York) and Dimple Gandhi as Trustees Under Mortgage and Deed of Trust, Dated as of October 1, 1945, With NorthWestern Corporation Forty-Fifth Supplemental Indenture Providing, Among Other Things, for the Succession of Dimple Gandhi to Mary Miselis as Co-Trustee Under Such Mortgage and Deed of Trust, and First Mortgage Bonds, 5.56% Series Due March 28, 2031 Dated as of March 1, 2024 Forty-Fifth Supplemental Indenture

from 8-K 27 pages NorthWestern Energy Public Service Corporation (Successor to Northwestern Corporation, Formerly Known as Northwestern Public Service Company) to the Bank of New York Mellon (Formerly the Bank of New York) as Trustee Under the General Mortgage Indenture and Deed of Trust, Dated as of August 1, 1993, With Northwestern Corporation (Formerly Known as Northwestern Public Service Company) Twenty-First Supplemental Indenture Providing, Among Other Things, First Mortgage Bonds, 5.55% Series, Due March 28, 2029 First Mortgage Bonds, 5.75% Series, Due March 28, 2034 Dated as of March 1, 2024

from 8-K 11 pages NorthWestern Energy Public Service Corporation (Successor to Northwestern Corporation, Formerly Known as Northwestern Public Service Company) to the Bank of New York Mellon (Formerly the Bank of New York) as Trustee Under the General Mortgage Indenture and Deed of Trust, Dated as of August 1, 1993, With Northwestern Corporation (Formerly Known as Northwestern Public Service Company) Twentieth Supplemental Indenture

from S-8 17 pages Amended and Restated Bylaws of NorthWestern Energy Group, Inc., a Delaware Corporation

from S-8 17 pages Amended and Restated Bylaws of NorthWestern Energy Group, Inc., a Delaware Corporation

from S-8 9 pages Article 1 Name

from S-8 9 pages Article 1 Name