NorthWestern Energy : BofA Chicago Round Robin

NWE

Overview

3

NWE - An Investment for the Long Term

Pure Electric &

Gas Utility

Solid Utility Foundation

Earnings &

Cash Flow

Recognized as one of

America's Greatest Workplaces

Attractive

Future Growth

Prospects

Financial Goals

& Metrics

Best Practices

Corporate

Governance

4

5th Best Governance Score

About NorthWestern

Montana Operations

Electric

413,400 customers

25,390 miles - transmission & distribution lines

1,065 MW maximum capacity owned power generation

Natural Gas

214,500 customers

7,354 miles of transmission and distribution pipeline

17.85 Bcf of gas storage capacity

Own 28.2 Bcf of proven natural gas reserves

South Dakota Operations

Electric

65,300 customers

3,735 miles - transmission & distribution lines

420 MW nameplate owned power generation

Natural Gas

50,500 customers

1,851 miles of transmission and distribution pipeline

Nebraska Operations

Natural Gas

43,300 customers

830 miles of distribution pipeline

5 Data as of 12/31/2024

The NorthWestern Value Proposition

+

~5% Dividend Yield

+

Base Capital Plan:

Incremental Opportunities:

4%-6% EPS Growth

> 6% EPS Growth

2025-2029 Capital Investment

($ Millions)

✓ Data centers & new large-

load opportunities

✓ FERC Regional

Transmission

✓ Incremental generating

capacity

(subject to successful resource

procurement bids)

=

=

9%-11% Total Growth

>11% Total Growth

$2.74 billion

of highly executable and

low-risk capital

investment forecasted over the next five years.

This investment is expected to drive annualized earnings and rate base growth of approximately 4% - 6%.

See slide titled "Strong Growth Outlook"

for additional information.

6

A Diversified Electric and Gas Utility

NorthWestern's '80/20' rules:

Approximately 80% Electric

and 80% Montana.

Nearly $5.4 billion of rate

base investment to serve our

customers.

7

Data as reported in our 2024 10-K

Highly Carbon-Free Supply Portfolio

MT

SD

8

Contracted energy from

Colstrip Energy Limited

Partners (CELP),

Yellowstone Energy

Limited Partners (YELP)

as well as a majority of

the contracted wind,

hydro and solar are

federally mandated

Qualifying Facilities, as

defined under the

Public Utility Regulatory

NWE

Policies Act of 1978

(PURPA).

NorthWestern does not

own all the renewable

energy certificates

(RECs) generated by

contracted resources

and periodically sells its

own RECs

with proceeds

benefiting retail

customers. Accordingly,

we cannot represent

that 100% of carbon-

free energy in the

portfolio was delivered

to our customers.

Based upon 2024 MWh's of owned and long-term contracted resources. Approximately 58% of our total company owned and contracted supply is carbon-free - better than the national average of ~41% in 2023. (eia.gov table 7.2b)

Strong Utility Foundation

1) NWE rates are average for 2024 - total residential revenues divided by total residential loads delivered

Electric source: U.S. EIA -

Average Retail Price of

Electricity, Annual for 2024

Natural Gas source: U.S.

EIA - U.S. Price of Natural

Gas Delivered to Residential

Customers for 2024

• Solid JD Power Overall Customer Satisfaction Scores

• Residential rates below national average1

• Solid electric system reliability

• Better than average natural gas leaks per mile

9

Solid Economic Indicators

Source: Company 10K's, 2022/2023 EEI Statistical Yearbook - Table 7.2, and EIA.gov

Source: Company 10K's and EIA.gov

10

Disclaimer

Northwestern Energy Group Inc. published this content on March 24, 2025, and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on March 24, 2025 at 20:23:26.056.