HDB Financial Services Ltd., Vikram Solar Ltd. and four other companies have received the go-ahead from the Securities and Exchange Board of India for their initial public offerings. The market regulator issued its observation letter on May 28, which in SEBI parlance means final approval.HDB Financial Services filed its draft red herring prospectus in October last year to raise up to Rs 12,500 crore through an IPO. The offer entails both fresh issue and offer for sale.The financial services company will offer equities with a face value of Rs 10 each worth Rs 2,500 crore as fresh issue. Promoter HDFC Bank will sell Rs 10,000-crore equities with a face value of Rs 10 each in the subsidiary.A-One Steels India Ltd., Shanti Gold International Ltd., Dorf-Ketal Chemicals India Ltd. and Shreeji Shipping Global Ltd. are the companies getting the SEBI nod for their IPOs.. Read more on IPOs by NDTV Profit.