Horizon Industrial Parks, backed by Blackstone, has filed preliminary papers with India's Sebi for an initial public offering (IPO) to raise Rs 2,600 crore. The company also secured approximately Rs 1,650 crore in a pre-IPO funding round, bringing the total targeted fundraising to about Rs 4,250 crore. Proceeds will be used for repaying borrowings and general corporate purposes. Horizon Industrial Parks is a major developer and operator of industrial and logistics facilities across India, with a portfolio of 60 million square feet.