The qualified institutional placement (QIP) issue may open on Thursday, they said.
When contacted, an Idea Cellular spokesperson declined to comment.
Announcing the fourth quarter results, Idea Chief Executive Himanshu Kapania had said the company board had approved raising Rs 3,000 crore through QIP route over the next 12 months.
The company will be investing up to Rs 3,500 crore in the current fiscal to build network and launch 3G services in Delhi by next year.
Its gross revenue grew by 17.3 per cent in FY 2014, nearly double the wireless industry growth rate.
"Despite higher network expansion and inflationary pressures, FY 2014 saw an annual EBITDA growth of 37.5 per cent, making Idea, the best performer among all the Indian telecom operators," the company had said.