Holcim hikes stake in Ambuja CementsBS Reporter / Mumbai October 22, 2007Holcim, the world's second largest cement maker, has scaled up its shareholding in Ambuja Cements (ACL) by 3.15% to nearly 40% for Rs 714 crore through open market operations.In a series of block deals, the Swiss cement major today purchased 4.8 crore shares, representing 3.15% stake in the country