Tata Sons Chairman emeritus Ratan Tata has invested an undisclosed amount in online lingerie retailer Zivame, people familiar with the matter told ET. Zivame has recently raised Rs 250 crore in Series C led by Zodius Technology Fund and Khazanah Nasional Berhad, the investment arm of the Malaysian Government. Tata has invested in several companies including Ola, Snapdeal and Paytm.