Tata Trusts own about 66 percent of Tata Sons. "The Directors of the Tata Sons board had repeatedly raised queries and concerns on certain business issues, and Trustees of the Tata Trusts were increasingly getting concerned with the growing trust deficit with Mr. Mistry, but these were not being addressed," Tata Sons said in the statement. "It is unforgivable that Mr. Mistry has attempted to besmirch the image of the Group in the eyes of the employees." Mistry's e-mail and Tata's rebuttal helps shed light on the power struggle occurring at the $100 billion conglomerate in the run-up to Mistry's ouster, which stunned India's business community. Mistry had been pushing to transform Tata Group into a more prudent enterprise than the globetrotter that bought Jaguar Land Rover and steelmaker Corus Group Plc under Ratan Tata.