Strategies for Sustainable Growth and Resilience

Vertically Integrated and Diversified Portfolio GROSS REVENUE MIX (2022) Geography Pacific 18% All Other 14% North Central 23% 0 Mountain 21% Asphalt 14% Ready-mix 19% Product Other 13% Northwest 23% Contracting services 38% Customer Concentration Other 80% Top 15 customers 0 Private 23% Revenue Mix¹ 0 20% Public 77% COMMENTARY ◉ ☐ Strong position in attractive high- ☐ growth mid-sized markets Integrated model makes us resilient through down cycles ■ No one customer is more than 5% of gross revenue Unique ability to flex between public and private work ■ Range of ~60% to ~90% public work since 2007 Aggregates 16% Note: Pie chart numbers are rounded and may not sum to 100%. 1 Based on contracting services only, 2022. KNIFE RIVER 40

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