Beating all estimates in the grey market, where shares were said to be trading at a premium of about 80%, Tata Tech shares listed at a 140% premium and then went on to rally another 17% to take the total gain at day's high price to as much as 180%. In recent years, the best IPO in terms of listing gain was that of Sigachi Industries which debuted on November 15, 2021, at 253% premium. The stock debuted at Rs 575 per share against an issue price of Rs 163.