Business Description

ICF International, Inc. was formed in 1999 as a Delaware limited liability company under the name ICF Consulting Group Holdings, LLC. It was formed to purchase our principal operating subsidiary, which was founded in 1969, from a larger services organization. We converted to a Delaware corporation in 2003 and changed our name to ICF International, Inc. in 2006. We completed our initial public offering in September 2006. We provide professional services and technology-based solutions, including management, technology, and policy consulting and implementation services, to government and commercial clients. Our government clients include U.S. federal agencies, state and local governments, as well as international governments. Our commercial clients include those that are inside and outside of the U.S. We help our clients conceive, develop, implement, and improve solutions that address complex business, natural resource, social, technological, and public safety issues. Our services primarily support clients that operate in these key markets: • Energy, Environment, Infrastructure, and Disaster Recovery; • Health and Social Programs; and • Security and Other Civilian & Commercial. We provide services to our diverse client base that deliver value throughout the entire life cycle of a policy, program, project, or initiative. We empower organizations to thrive in a rapidly changing world through five integrated service areas: Advisory Services, Program Implementation, Analytics Services, Digital Services, and Engagement Services. Our Advisory Services deliver strategic insights that help leaders anticipate trends and make confident decisions. Through Program Implementation, we turn strategy into action with tailored policies, programs, and tools that drive efficiency and impact. Our Analytics Services transform data into intelligence, leveraging advanced analytics and artificial intelligence (“AI”) to uncover opportunities and more informed decisions. With Digital Services, we design and secure innovative technology solutions that optimize performance, modernize information technology (“IT”) systems, and protect against evolving threats. Finally, our Engagement Services connect organizations with their audiences through compelling communications, branding, and digital experiences that inspire trust and action. Together, we provide end-to-end solutions that accelerate growth, strengthen resilience, and deliver measurable results. We report operating results and financial data in one operating and reportable segment. We generated revenue of $1,872.9 million, $2,019.8 million, and $1,963.2 million during the years ended December 31, 2025, 2024, and 2023, respectively. Our total backlog was $3,405.0 million, $3,786.3 million, and $3,777.8 million at December 31, 2025, 2024, and 2023, respectively. As of December 31, 2025, we had approximately 8,400 full-time and part-time employees around the globe, including many recognized as thought leaders in their respective fields. We serve clients globally from our headquarters in the Washington, D.C. metropolitan area, our 49 regional offices throughout the U.S., and 14 offices outside the U.S., including offices in the United Kingdom (the “U.K.”), Belgium, Spain, India, and Canada. 5 OUR COMPANY INFORMATION Our principal executive office is located at 1902 Reston Metro Plaza, Reston, Virginia 20190, and our telephone number is (703) 934-3000. We maintain an internet website at www.icf.com. We make available our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and amendments to such reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), Code of Business and Ethics, and other information related to us, free of charge, on this site as soon as reasonably practicable after we electronically file those documents with, or otherwise furnish them to, the SEC. Our internet website and the information contained therein or connected thereto are not intended to be incorporated into this Annual Report on Form 10-K. The SEC also maintains an internet website that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC at http://www.sec.gov.…