The Rs 273-crore IPO received bids for 5.74 crore shares against 29.88 lakh shares on offer, as per data available with the NSE till 1500 hrs.
Power Mech is the tenth company to hit the capital markets this year.
The overall public issue comprises 42,69,000 equity shares (including anchor portion of 12,80,700 shares).
The price band for the issue has been fixed at Rs 615-640 per share.
Based on the price band, the company could garner between Rs 262.5 crore and Rs 273.2 crore through its initial share sale programme.
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The proceeds of the issue would be utilised towards expanding the company's presence globally and to meet working capital requirements.
The IPO is being managed by Kotak Mahindra Capital, IIFL Holdings and Motilal Oswal Investment Advisors.
Power Mech is engaged in three business verticals, including erection, testing and commissioning of boilers, turbines and generators and balance of plant (BOP) for power sector, operation and maintenance and civil works which include construction jobs for the main plant and BOP requirements.
So far in 2015, nine firms have mobilised nearly Rs 4,400 crore through IPOs, higher than funds raised in the preceding two years.