Flexible Renewable Storage Potential

CO 6 KEY THEMES AND Q3 2021 RESULTS • . • Earned net income of $1.24 per share for the first nine months of 2021, compared to $0.80 from continuing operations for the same period in 2020, an increase of 55% Added nearly 12,000 natural gas meters in the last 12 months for a growth rate of 1.5% Received Washington rate case order approving a two-year adjustment that combined has an estimated pre-tax earnings benefit of up to $8 million Continue to work on procuring and investing in renewable natural gas (RNG) opportunities under Senate Bill 98 most recently signing contract with Archaeal Released Vision 2050: Destination Zero, an in-depth scenario analysis illustrating options for NW Natural to achieve carbon neutrality by 2050 for the energy services it provides to its customers Launched a competitive renewable energy strategy Signed a purchase agreement to acquire Far West water and wastewater utilities, doubling the size of our water utility business. Increased our dividend for the 66th consecutive year; annual indicated dividend rate of $1.93 per share Executing on Strategy NW Natural HOLDINGS™

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