CELEBRATING EARTH DAY 2021

2021 First Quarter Earnings Webcast

April 22, 2021

Bob Rowe,

CEO

Brian Bird,

President & COO

Crystal Lail,

Vice President & CFO

Presenting Today

Forward Looking Statements

During the course of this presentation, there will be forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements often address our expected future business and financial performance, and often contain words such as "expects," "anticipates," "intends," "plans," "believes," "seeks," or "will."

The information in this presentation is based upon our current expectations as of the date of this document unless otherwise noted. Our actual future business and financial performance may differ materially and adversely from our expectations expressed in any forward-looking statements. We undertake no obligation to revise or publicly update our forward-looking statements or this presentation for any reason. Although our expectations and beliefs are based on reasonable assumptions, actual results may differ materially. The factors that may affect our results are listed in certain of our press releases and disclosed in the Company's 10-K and 10-Q along with other public filings with the SEC.

2

Significant Events

  • Net income for the first quarter of 2021 increased $12.4 million, as compared to the same period in 2020.
    • Diluted earnings per share increased $0.24, or 24.0%, as compared to the same period in 2020.
    • After adjusting for weather differences, Non-GAAP* adjusted earnings per share increased $0.20, or 18.9%, as compared to the same period in 2020.
  • The Board of Directors declared a quarterly dividend of $0.62 per share payable June 30, 2021 to shareholders of record as of June 15, 2021.
  • Bid submissions for the January 2020 RFP were evaluated by an independent administrator. After reviewing the independent analyses, the following portfolio of projects was selected for addition:
  • The construction of Laurel Generating Station (175 MW natural gas-fired generating facility)
  • A 5-Year agreement with Powerex to purchase capacity (market-based, for 100 MW)
  • Anticipate finalizing an agreement for an energy storage contract to fill the 5-hour duration tier identified in the January 2020 RFP.

3 * See slides 13 & 31 for additional information and Non-GAAP disclosures.

NorthWestern Energy

A pure electric and natural gas utility; serving as stewards of critical energy infrastructure; providing

essential services - in times of trial and triumph; to our resilient customer base spanning a vast footprint over Montana, South Dakota, Nebraska & Yellowstone Nat'l Park.

A Strong Financial Foundation and Investment for the Long Term

  • Over 100 years of operating history
  • Customer bills well below national average
  • Highest ever customer satisfaction scores
  • Award winning and best practices corporate governance
  • A history of strong earnings growth
  • Stable and flexible investment grade balance sheet
  • Ample liquidity to weather uncertainty (temporarily doubled targeted liquidity $100 to $200 million)
  • A history of annual dividend increases (from $1.00 per share in 2005 to $2.48 in 2021)
  • A disciplined capital investment program ($450 million + plan maintained for 2021)
  • A history of stable and consistent customer growth
  • A diverse energy supply portfolio already 65% carbon-Free(2020 MWh delivered)
  • A significant generation capacity deficit with opportunity for investment

4

Summary Financial Results

(First Quarter)

(1)

5 (1) Gross Margin, defined as revenues less cost of sales, is a non-GAAP Measure See appendix for additional disclosure.

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Disclaimer

NorthWestern Corporation published this content on 21 April 2021 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 21 April 2021 23:23:01 UTC.