Unimech Aerospace and Manufacturing made its stock market debut on Tuesday. The shares got listed at ₹1,491 on BSE, a 90% premium over its IPO price of ₹785. On NSE, the shares were listed at ₹1,460, a premium of 86%. The ₹500-crore IPO, comprising a fresh issue of ₹250 crore and an offer-for-sale of ₹250 crore, was subscribed 175 times.