More than seven months after trading was suspended from dematerialisd (demat) accounts without a Permanent Account Number (PAN), investors are yet to provide the PAN details for over 25 lakh accounts.According to the latest data available with two leading depositories, NSDL and CDSL, as many as 25.4 lakh demat accounts are still suspended due to non-compliance with the PAN rules.This represents nearly 55% of about 44 lakh accounts frozen with effect from January 1, 2007.Interestingly, more than 11 lakh frozen accounts show holding of some shares - down from more than 20 lakh such accounts at the beginning of the year.NSDL and CDSL together maintain a total of more than 1.05 crore demat accounts now - up from nearly 99 lakh at the beginning of this year.