20220233 SSUUSTSTAAINAINABBILITILITY REY REPPORORTT Message from Management 1. Overview About Kiewit Sustainability at Kiewit Our Projects 2. Governance Corporate Governance Go Green Committees promote sustainable practices and bring Supply Chain employees together to serve communities 3. Environmental Some of our o昀昀ice hubs have Go Green Committees, unnecessary lights and the Go Green Committee Environmental Stewardship which are focused on promoting sustainable practices in hosted a company-wide contest to encourage all aspects of our lives. The committees lead stewardship employee participation in Earth Hour. Greenhouse Gases & opportunities and provide education and awareness on Energy Consumption environmental sustainability topics. The Lenexa, Kansas, Go Green Committee hosted the 4. Social following activities in 2023: Here’s what the Omaha, Nebraska, Go Green Committee Health & Safety organized in 2023: ■ Seed collection – Employees collected seeds at Diversity, Equity & Inclusion Shawnee Mission Park to be replanted in the ■ A park clean-up during Kiewit Volunteers Month – 50 KC Area by KC WildLands. Talent & Workforce employee participants collected 239 pounds of waste Development at a park clean-up during Kiewit Volunteers Month. ■ An electronics recycling drive for America Recycles Community Engagement Day – 4,100 pounds of electronics were collected ■ An electronics recycling drive and clothing collection and diverted from landfills. drive for America Recycles Day – 2,314 pounds of Appendix electronics were recycled and 259 pounds of clothes In Lone Tree, Colorado, employees celebrated Earth were donated. Week with many activities, including a plant propagation ■ An Earth Hour observance – The Kiewit Headquarters swap, book swap, electronics recycling drive and building participated in Earth Hour by turning o昀昀 all recycled art contest. 3939