ICF Investor Presentation Q4 2023

...and in the way we operate ICF is proud of how we operate in our communities and in society Environment Carbon neutral since 2006 – high quality RECs & offsets - CDP Climate Leadership Award Total and per-employee emissions declining since 2013 80% 60% 40% 20% 0% -20% -40% -60% -80% -100% 2013 2014 2015 2016 2017 2018 2019 2020 Global Revenue Global FTE Employees Global Square Feet Total Emissions --Emissions/Sq Ft --Emissions/FTE --Emissions/MUSD Social Forbes list for "Best Employers for Diversity" 2021, 2022, 2023 ICF philanthropy driven primarily by employee giving choices 100% match and cash support for volunteer efforts - 8 Employee Community Networks . ⚫ Black Employees Women . LGBTQIA+ ⚫ First Nation & Indigenous • Veteran • Asian . Hispanic ⚫ Different abilities Governance Strong Lead Independent Director with clearly articulated responsibilities 38% female Directors 50% female +/or minority Directors Board oversees · Enterprise risk management process Management succession planning and development Regular executive sessions of independent directors 19

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