The Reserve Bank of India (RBI) has rejected Tata Sons’ application to surrender its Certificate of Registration as a Core Investment Company (CIC), sources told ET Now. The central bank communicated its decision to Tata Sons through a letter. Tata Sons had applied to the RBI in 2024 seeking to deregister as a CIC. Following the rejection, Tata Sons will be required to list its shares under RBI rules governing CICs, sources said.