Shares of Epack Prefab Technologies debuted on Wednesday at a discount to its IPO price. On the NSE, the stock opened at Rs 183.85, down 9.87% from the issue price of Rs 204, while on the BSE, it listed at Rs 186.10, an 8.73% discount. The listing came below grey market expectations, which had predicted a flat debut. Ahead of listing, the stock was trading at a GMP of 0%.