Unimech Aerospace and Manufacturing shares dropped 9.4% to Rs 1,350.4 on the BSE after a strong debut. The stock listed at Rs 1,491 on BSE, reflecting a 90% premium over its IPO price of Rs 785. The company’s Rs 500-crore IPO was oversubscribed by 175.31 times, with strong demand from retail, non-institutional, and institutional investors.