Tata Sons has marginally increased its stake in Tata Motors to 25.46 per cent from 25.41 per cent.
Tata Sons bought 12 lakh shares of Tata Motors on the NSE in two tranches for Rs 29.89 crore.
The first lot of seven lakh shares was bought on June 25 for Rs17.48 crore. The second lot of five lakh shares was bought the next day for Rs12.41 crore.
Tata Sons now hold 70.15 crore shares of Tata Motors.
The transactions were routed through Tata Securities, said Tata Motors in an exchange filing.