Northwestern Energy Group, Inc.NASDAQ: NWE

2025 Great Falls Gas - Propane Annual Report

· Issued by Northwestern Energy Group, Inc.

YEAR ENDING 2025

ANNUAL REPORT

OF

NorthWestern Great Falls Gas, LLC (Propane)

GAS UTILITY

Docket 2026.01.001

TO THE

PUBLIC SERVICE COMMISSION STATE OF MONTANA

1701 PROSPECT AVENUE

P.O. BOX 202601

HELENA, MT 59620-2601

NorthWestern Great Falls Gas, LLC (Propane) Annual Report

Table of Contents

Description Schedule

Identification

1

Board of Directors

not applicable

2

Officers

3

Corporate Structure

4

Corporate Allocations

5

Affiliate Transactions - To the Utility

6

Affiliate Transactions - By the Utility

7

Montana Utility Income Statement

8

Montana Revenues

9

Montana Operation and Maintenance Expenses

10

Montana Taxes other Than Income

not applicable

11

Payments for Services

12

Political Action Committees/Political Contributions

not applicable

13

Pension Costs

not applicable

14

Other Post Employment Benefits

not applicable

15

Top Ten Montana Compensated Employees

16

Top Five Corporate Compensated Employees

17

Balance Sheet

18

continued on next page

Description Schedule

Montana Plant In Service 19

Montana Depreciation Summary 20

Montana Materials and Supplies not applicable 21

Montana Regulatory Capital Structure 22

Statement of Cash Flows 23

Long Term Debt 24

Preferred Stock not applicable 25

Common Stock not applicable 26

Montana Earned Rate of Return 27

Montana Composite Statistics 28

Montana Customer Information 29

Montana Employee Counts 30

Montana Construction Budget 31

Transmission, Distribution and Storage Systems not applicable 32

Sources of Gas Supply 33

MT Conservation and Demand Side Mgmt Programs not applicable 34

Montana Consumption and Revenues 35

Natural Gas Universal System Benefits programs not applicable 36a Montana Conservation and Demand Side Mgmt programs not applicable 36b

Sch. 1

IDENTIFICATION

1

Legal Name of Respondent:

Name Under Which Respondent Does Business: Date Utility Service First Offered in Montana:

Great Falls

Cascade

West Yellowstone Person Responsible for Report:

Telephone Number for Report Inquiries:

Address for Correspondence Concerning Report:

NorthWestern Great Falls Gas, LLC NorthWestern Energy

Manufactured Gas: December 8, 1909

Natural Gas: May 2, 1928

Propane: August 1994 Natural Gas: July 2009

Natural Gas: September 1995 Jeff B. Berzina

(406) 497-2759

11 East Park Street Butte, MT 59701

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If direct control over respondent is held by another entity, provide below the name,

25

address, means by which control is held and percent ownership of controlling

26

entity:

27

28

Respondent is a wholly-owned, direct subsidiary of NorthWestern Corporation.

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34

Schedule 1

Sch. 3

OFFICERS

Title

Department Supervised

Name

1

2

3

4

5

6

7

8

9

10

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12

13

14

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58

President

Vice President Treasurer Secretary

Assistant Secretary

Brian Bird Crystal Lail Emilie Ng Tim Olson

Emily Larkin Folsom

Reflects active officers as of December 31, 2025.

Schedule 3