Gujarat-based compliance and validation company Gamp Services has filed a draft red herring prospectus (DRHP) with the Securities and Exchange Board of India (SEBI) to raise funds through an initial public offering (IPO) of 46.93 lakh shares. The IPO comprises a fresh issue of 31.93 lakh shares and an offer for sale (OFS) of 15 lakh shares. Promoters Sanjeevkumar Mahendrakumar Patel, Girish Agrawal and Gaurav M Shah will be the selling shareholders in the OFS.