Aditya Birla Group Chairman KM Birla purchased additional shares worth ₹24.89 crore in Vodafone Idea on September 6, media reports said. He now holds 1.94 crore shares of the telecom major. Birla's purchase came on the day Vodafone Idea shares dipped over 11% after brokerage firm Goldman Sachs forecasted an 83% dip in the firm's share price.