The initial public offering (IPO) of Unimech Aerospace, which opened for subscription earlier on Monday, sailed through on the first day of the bidding process. It was subscribed 3.81 times at the closing time. The issue attracted a robust demand from retail and non-institutional investors, getting subscribed 4.45 times by the former and 4.02 times by the latter. The qualified institutional buyers' (QIBs') quota was booked 2.49 times as the consolidated share bid received stood at 33.38 lakh versus 13,38,255 shares reserved from them.