TK (previously known as Atlético de Kolkata) is an Indian professional football club based in Kolkata, West Bengal, that plays in Indian Super League under licence from the All India Football Federation (AIFF). It was established on 7 May 2014 as the first team in the Indian Super League, and plays its home games at the Salt Lake Stadium. The team is owned by Kolkata Games and Sports Pvt. Ltd. which consists of former Indian cricket captain Sourav Ganguly, alongside businessmen Harshavardhan Neotia, Sanjiv Goenka and Utsav Parekh. Initially for first three seasons Spanish La Liga club Atlético Madrid were also a co-owner, later Goenka bought the shares owned by Atlético Madrid. After the end of their partnership with Spanish giant, Atletico de Kolkata has been rechristened to ATK in July 2017.