The Committee on Foreign Investment in the United States (CFIUS, commonly pronounced "Cifius" /ˈsɪfiəs/) is an inter-agency committee of the United States government that reviews the national security implications of foreign investments in U.S. companies or operations. Chaired by the United States secretary of the treasury, CFIUS includes representatives from 16 U.S. departments and agencies, including the Defense, State and Commerce departments, as well as (most recently) the Department of Homeland Security.