The open offer to acquire 1.346 crore shares, or 26 per cent of the paid-up capital of Ganesh Benzoplast, begins on Tuesday and will close on June 6. Rishi Ramesh Pilani along with Tarang Advisory Pvt Ltd, Gul Kewalram Bijlani and Dinesh P Thapar is offering ₹16.20 a share in cash to the shareholders of Ganesh Benzoplast. The open offer follows the promoter exercised a call option, aggregating to the purchase of 44.07 lakh shares, representing 8.51 per cent stake.