ICF Investor Presentation Q4 2023

Utility consulting and decarbonization programs ● ICF is a leader in implementing decarbonization programs (energy efficiency, electrification, flexible load management) for utilities Supporting utility transformation: distributed energy, grid resilience, and electrification (EVs, buildings, other) ● Majority long-term contracts Utility work across North America 210+ 75+ Active programs Utility clients 20 Large portfolios Industry leading planning and policy development 30 Location of ICF U.S. energy clients DSM program design clients 7 27 40+ Potential study clients Related regulatory testimonies ICF

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