Exhibit 99.1 NEWS RELEASE ICF Reports Third Quarter 2025 Results ―Revenues From Commercial Clients and State & Local and International Government Clients Increased 14% to Account for 57% of Q3 Revenues― ―Revenues from Commercial Energy Clients Up 24%― ―Favorable Mix and Effective Cost Management Continued to Drive Margin Expansion― ―Maintains Guidance Framework and Expects a Return to Revenue and Earnings Growth in 2026― Third Quarter Highlights: RESTON, Va., October 30, 2025 — ICF (NASDAQ: ICFI), a leading ...