20220233 SSUUSTSTAAINAINABBILITILITY REY REPPORORTT Appendix Section Subsection Data Point 2023 2022 2021 Message from Management Completion of Core Values Training %* 100% 98.6% 98.6% 1. Overview Completion of Anti-Bribery and Corruption Training %* 100% 98.9% 99.1% ce Corporate Governance n Completion of Antitrust Training %* 100% 98.8% 99.3% a About Kiewit n er v Completion of Diversity Contracting Training %* 100% 99.75% 99.25% o Sustainability at Kiewit G Dollars spent with DBE firms — U.S.* $1,068,055,756 $1,295,794,919 $1,245,523,980 Our Projects Supply Chain Percent of overall U.S. spend that went to DBE firms* 12% 20% 21% l ta 2. Governance n Scope 1 emissions (Metric tons CO2e) 609,567 468,510 451,470 e Greenhouse Gases & Energy nm ro Consumption i v Scope 2 emissions (Metric tons CO2e) 73,866 49,107 38,564 n Corporate Governance E Supply Chain Lost Time Incident Rate 0.05 0.03 0.06 Health & Safety Total Recordable Incident Rate 0.25 0.17 0.26 3. Environmental # of Project Goose Eggs — Projects that worked 200,000 hours or more without a recordable 23 24 23 Environmental Stewardship Gender Diversity (U.S. & Canada) — All employees % 14% 14% 12% Greenhouse Gases & Gender Diversity (U.S. & Canada) — Staff employees % 23% 23% 22% Energy Consumption Gender Diversity (U.S. & Canada) — Craft employees % 6% 5% 5% 4. Social Racial & Ethnic Diversity (U.S.) — All employees % 44% 41% 42% Health & Safety Racial & Ethnic Diversity (U.S.) — Staff employees % 27% 25% 24% Diversity, Equity & Inclusion Diversity, Equity & Inclusion Racial & Ethnic Diversity (U.S.) — Craft employees % 61% 57% 57% l a ci Military service member/Veteran (U.S.) — All employees % 4.8% 4.5% 4.8% Talent & Workforce o S Development Women in Kiewit and Legacy Diversity Scholarships — # of new scholarship recipients selected annually 12 10 6 Community Engagement Women in Kiewit and Legacy Diversity Scholarships — # total scholarship recipients funded annually (new + renewed) 32 27 21 Women in Kiewit and Legacy Diversity Scholarships — total $ invested annually $300,000 $220,000 $190,000 Appendix Women in Kiewit and Legacy Diversity Scholarships — # of recipients who have graduated through 2023 10 Women in Kiewit and Legacy Diversity Scholarships — # of graduates working full-time with Kiewit at year-end 2023 4 Women in Kiewit and Legacy Diversity Scholarships — total recipients — lifetime of program 44 Women in Kiewit and Legacy Diversity Scholarships — total $ invested — lifetime of program $1,005,000 * Excludes Weeks Marine Inc. in 2023 data point; Weeks Marine Inc. data is not included in any 2022 or 2021 data points 92929292