X0609 4 2026-03-20 0001362004 ICF International, Inc. ICFI 0001376437 Wasson John false 1902 RESTON METRO PLAZA RESTON VA 20190 1 1 CEO & President 0 Common 2026-03-20 4 M 0 7676.0000 0 A 18896.0000 D Common 2026-03-20 4 M 0 7312.0000 0 A 26208.0000 D Common 2026-03-20 4 M 0 3379.0000 0 A 29587.0000 D Common 2026-03-20 4 F 0 1524.0000 65.8900 D 28063.0000 D Common 2026-03-20 4 F 0 3298.0000 65.8900 D 24765.0000 D Common 2026-03-20 4 F 0 3462.0000 65.8900 D 21303.0000 D Common 716.0000 I By Spouse Common 12739.0000 I John M. Wasson Remainder Trust 2022 Common 39922.0000 I John M. Wasson Rev. Trust Common 39212.0000 I JW 26 GRAT Restricted Stock Units 2026-03-20 4 A 0 36443.0000 0.0000 A Common 36443.0000 83501.0000 D Restricted Stock Units 2026-03-20 4 M 0 3379.0000 D Common 3379.0000 80122.0000 D Restricted Stock Units 2026-03-20 4 M 0 7312.0000 D Common 7312.0000 72810.0000 D Restricted Stock Units 2026-03-20 4 M 0 7676.0000 D Common 7676.0000 65134.0000 D The exercise price for the restricted stock unit exercise was $65.89. Each restricted stock unit is the economic equivalent of one share of ICF International, Inc.'s Common Stock. These acquired restricted stock units were granted pursuant to ICF International, Inc.'s 2018 Omnibus Incentive Plan, as amended. These restricted stock units vest over a period of three (3) years, at 25% on each of the first two anniversaries of the grant and 50% on the third anniversary from the day of grant. Represents the second vesting anniversary (25%) of acquired restricted stock units granted pursuant to the 2018 Omnibus Incentive Plan, as amended. Represents the first vesting anniversary (25%) of acquired restricted stock units granted pursuant to the 2018 Omnibus Incentive Plan, as amended. Represents the third vesting anniversary (50%) of acquired restricted stock units granted pursuant to the 2018 Omnibus Incentive Plan, as amended. /s/ James E. Daniel, Attorney-in-fact 2026-03-24