By the end of 2015, five THAAD batteries were active.20 As of 2019, the United States fields seven THAAD batteries and has deployed three outside of the continental United States, including in Guam and South Korea.21 The United States fields additional FBM AN/TPY-2 radars at Kyogamisaki, Japan; Shariki, Japan; Kürecik, Turkey (Site K); Mt. Keren,Israel (Site 512); and at a fifth, unknown, site, likely in Saudi Arabia (Site 4a).22
https://missilethreat.csis.org/system/thaad/