Three companies -- Cyient DLM, Healthvista India and Zaggle Prepaid Ocean Services -- have received SEBI's go- ahead to raise funds through initial public offering (IPO). The three companies, which filed their preliminary IPO papers with the regulator between July 2022 and January 2023, obtained its observation during March 29-31, an update with the Securities and Exchange Board of India (SEBI) showed on Wednesday.