Vibhor Steel Tubes, with a subscription rate of 298.86 times, was the most subscribed mainboard IPO in India this year, NDTV Profit reported. It was followed by BLS E-Services and Mukka Proteins, with subscription rates of 162.47 and 136.99 times, respectively. Le Travenues Technology, parent company of ixigo, was at the 10th spot with a subscription rate of 98.34 times.