TataDoesn't Always Mean Goodbye, Part One The first of a two-part heritage series chronicling the Tatas' aviation journey since 1918... TataSons is the principal investment holding company and promoter ofTatacompanies. There are 26 publicly listedTatacompanies with an aggregate market capitalisation of more than $328 billion as on March 31,2025. Browse a list ofTatacompanies below. EachTatacompany or enterprise operates independently under the guidance and supervision of its own board of directors. There are 26 publicly listedTatacompanies with an aggregate market capitalisation of more than $328 billion as on March 31,2025.