Eveready's single-largest investor Burman family on Monday said it made an open offer to buy an additional 26% stake, or 18.9 million shares, for ₹604.76 crore in Eveready Industries Ltd. The mandatory open offer under the takeover regulations was made as the Burmans acquired an additional 5.26% share of Eveready for ₹122.30 crore, taking their total shareholding to 25.11%.