Strategies for Sustainable Growth and Resilience

Retention: Competitive Advantage LOWER TURNOVER LEADS TO HIGHER PRODUCTIVITY Annualized Knife River US Total Private Mining/Logging Construction Turnover by Year 2017 31% 43% 48% 48% 62% 2018 31% 44% 49% 55% 58% 2019 30% 45% 50% 48% 65% 2020 28% 57% 63% 55% 69% 2021 33% 47% 52% 37% 56% 2022 32% 48% 52% 38% 53% Lower turnover rates than industry and US average LONGER TENURE SUPPORTS SAFETY AND QUALITY Median Tenure by Industry 5.7 5.7 5.7 5.2 3.9 3.7 Median Tenure by Occupation Knife River ■ US 15.8 8.1 6.2 4.7 4.9 4.6 3.9 3.1 Mining/Quarrying Source: BLS statistics. Construction Transportation and Utilities Management Professional Construction Transport and and related and extraction material moving Knife River median tenure 5.7 years, compared to 4.1 years for US labor force KNIFE RIVER 29 29

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