NSDL shares have jumped 62.5 per cent from the IPO price in just three sessions.
The stock hit a record high of Rs 1,342.60 on the BSE on August 8.
It ended the day at Rs 1,300.30, up 15.8%, with turnover crossing Rs 6,900 crore.
From its listing price of Rs 880, the stock has rallied over 52.5 per cent.
NSDL handles Rs 510.91 lakh crore in assets and serves 4 crore demat accounts.
India's depository industry is booming, with demat accounts growing at 53 per cent CAGR since FY19.