Together, the total number of demat accounts stood at 2.37 crore at the end of June this year -- translating to an addition of 16.64 lakh accounts from the same period in 2014. During June 2013-June 2014 period, a total of 8.3 lakh demat accounts were registered on the depositories.According to market analysts, the number of demat accounts has seen a rise in past year on account of positive stock market sentiments, more initial public offers (IPOs) and digitisation of new securities classes like insurance. In the last 12 months beginning July 1, 2014, the benchmark BSE Sensex as well as NSE Nifty has risen by about 9 per cent.