20220233 SSUUSTSTAAINAINABBILITILITY REY REPPORORTT Our Projects MarkMarkeettss BuildingBuilding 4%4% Message from Management We’re building for North America’s future. We partner with our clients to deliver projects that improve IndusIndustrialtrial 2%2% 1. Overview livelihoods. Our goal is to transform our construction MarineMarine 10%10% and engineering expertise into projects that have a MiningMining 2%2% About Kiewit positive impact on the quality of life in communities Sustainability at Kiewit across North America — today and in the future. Oil, Gas & ChemicalOil, Gas & Chemical 22%22% Our Projects PowePowerr 23%23% The diversity across our projects in terms of the 2. Governance markets we serve, contract size, contract model TTrransportansportaationtion 26%26% and geographic location, helps ensure the long-term WaWatteerr 11%11% Corporate Governance stability of our business. Supply Chain Highlighted on the following pages are some of the ConContrtracact Sizt Sizee 3. Environmental projects awarded, underway or completed by Kiewit teams in 2023. These projects demonstrate how Kiewit, < $< $1M1M 3%3% Environmental Stewardship alongside our clients, is helping to improve livelihoods Greenhouse Gases & in the communities where we work and live. $$1-1-10M10M 21%21% Energy Consumption $$10-50M10-50M 10%10% 4. Social $50-$50-100M100M 28%28% Health & Safety $$100-100-250M250M 10%10% Diversity, Equity & Inclusion > $250M> $250M 28%28% Talent & Workforce Development Community Engagement DelivDelivery Modelsery Models Bid BuildBid Build 40%40% Appendix CMGCCMGC 13%13% Design Build/EPCDesign Build/EPC 42%42% DesignDesign 5%5% 7777