Flipkart-backed logistics unicorn BlackBuck has filed its red herring prospectus (RHP) with the Registrar of Companies.BlackBuck's maiden public issue for subscription will open on November 13 and close on November 18.The IPO includes a fresh issuance of equity shares worth INR 550 Cr and an offer for sale of 2.06 Cr shares by existing shareholders.BlackBuck aims to raise up to INR 1,114.72 Cr through the IPO, with a price band of INR 259 to INR 273 per equity share.