X0609 4 2026-08-26 0001362004 ICF International, Inc. ICFI 0001652933 Ostria Sergio J false 1902 RESTON METRO PLAZA RESTON VA 20190 1 Executive Vice President 0 Common 2026-08-26 4 S 0 2000.0000 88.5915 D 24467.0000 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $88.42 to $88.73, inclusive. The reporting person undertakes to provide to ICF International, Inc., any security holder of ICF International, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4. /s/ James E. Daniel, Attorney-in-fact 2026-08-26