Fixed-Income Investor Presentation

17 WASHINGTON 2021 RATE CASE o Order received October 21, 2021 - Multi- party settlement approved by the WUTC. New rates were effective Nov. 1, 2021 with the second year effective Nov. 1, 2022 o Request Based on System Investments - Multiyear rate case to recover investments and costs for: System resiliency & reliability 2021 - 2022 RATE CASE Year 1 Year 2 Request Order Request Order ROR 6.913% 6.814% 6.913% 6.814% Rate Base $225.9M $225.9M $247.3M $247.3M • Headquarter leasehold improvements & rent costs Revenue +$6.3M +$5.0M +$3.2M Requirement Up to +$3.0M1 Vancouver, Washington service center upgrades 1 Year 2 is subject to prudency filing and full review • Consumer-focused technology investments NW NaturalⓇ

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