In a bid that is bound to intensify the ongoing takeover battle, Adventz Group chairman Saroj Poddar has made an upward revision in his fresh open offer size for additional equity of Mangalore Chemicals and Fertilizers (MCF). In a filing with the BSE on Tuesday, MCF said ICICI Securities (manager to the open offer) on behalf of Poddar's Zuari Fertilisers and Chemicals (acquirer) and Zuari Agro Chemicals (persons acting in concert) has informed the upward revision in the offer size from 25.90% equity shares to 36.56% shares. Based on the revised offer size, the maximum consideration payable under this offer at the offer price of R91.92 per equity share would be R398.28 crore. Poddar, UB Group chairman Vijay Mallya's friend and ally, had announced the fresh open offer for 25.90% additional equity of MCF at an offer price of R91.92 per share in the first week of December.