GEO Group, Inc. invests in private prisons and mental health facilities in the U.S. and internationally. GEO's facilities include illegal immigration detention centers, minimum security detention centers, and mental-health and residential-treatment facilities. It also operates government-owned facilities pursuant to management contracts. The company was designated as a real estate investment trust (REIT) until 2021. GEO was founded in 1984 and is headquartered in Boca Raton, FL.