BLS Polymers IPO opens for subscription on October 27, 2026, and will remain open for bidding until October 29. The issue commands a grey market premium (GMP) of 27%, indicating expectations of a potential listing gain.BLS Polymers IPO is a book-built issue worth Rs 255 crore, comprising an entirely fresh issue of 1.70 crore shares. The price band is Rs 142–150 per share, with a lot size of 100 shares.