Strategies for Sustainable Growth and Resilience

Regional Overview Pacific Northwest Mountain North Central All Other1 Company KNIFE RIVER 2022 Revenue $469 MM $600 MM $542 MM $608 MM $353 MM $2,535 MM Business Mix 23% 37% 44% 43% 000 57% 63% 56% 18% 0 77% Materials Contracting Services 2022 EBITDA Margin 11.9% 3-yr Avg. EBITDA 15.0% Margin 38% 82% 62% 17.3% 13.4% 10.7% 2.7% 11.7%² 17.4% 12.9% 12.1% 4.6% 12.4%² Note: EBITDA, Adj. EBITDA and Cash Flow are non-GAAP measures, see Appendix for reconciliation. Revenue represents 2022 revenue and business mix represents 2022 revenue mix before intersegment eliminations. Pie chart numbers are rounded and may not sum to 100%. 1 All Other segment consists of Energy Services, Texas and corporate services; 2 Pro Forma Adjusted EBITDA. KNIFE RIVER 17

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