However the regulator is yet to receive clarification from Indigo without disclosing the details of clarifications sought, Sebi has said that it is awaiting response from 'Lead Managers' for the proposed public offers.
According to the latest weekly update on the processing status of draft offer documents filed with Sebi, the market regulator has said clarifications were awaited on the IPO of RBL Limited as well as of August 7th.
The capital market watchdog said it might issue observations on draft offer documents within 30 days, after receiving satisfactory reply from the lead merchant bankers regarding the clarification or additional information sought from them.
All these companies had filed their respective draft offer document with Sebi in June, 2015.
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As per the draft papers, InterGlobe Aviation, which runs the country's biggest airline by market share under IndiGo brand, plans to raise an estimated Rs 2,500 crore.
Besides, Coffee Day Enterprises, which runs the country's biggest coffee chain Cafe Coffee day (CCD), aims to garner Rs 1,150 crore through its initial share-sale plan, while RBL Bank intends to raise at least Rs 1,100 crore through public offer.
Matrix Cellular's IPO comprises an offer for sale of 15,172,540 equity shares from its promoters and existing shareholders.
So far in 2015, eight companies have launched their IPOs and have collectively raised nearly 4,000 crore, while the public offer of biotechnology major Biocon's research arm Syngene International is currently underway.
In comparison, a total of six IPOs had hit the market in the entire 2014 and together garnered just Rs 1,528 crore.