Over-the-top streaming platform Ullu Digital has filed a draft red herring prospectus (DRHP) for an initial public offering to raise around Rs 135-150 crore.The Ullu platform has proposed to raise funds via fresh issue of up to 62,62,800 equity shares.The company's DRHP, filed with the BSE SME, does not have any offer for sale component, reports startup coverage portal Entrackr.