The open offer to the shareholders of RattanIndia Infrastructure (formerly Indiabulls Infrastructure and Power) begins on Tuesday and ends on January 6, 2016. Laurel Energetics Pvt Ltd and Arbutus Consultancy LLP, along with four others (promoters), plan to acquire 35.939 crore shares at ₹3.20 a share. The open offer was necessary as the promoters’ stake in the company rose by 5 percentage points this fiscal to 47.01 per cent.