How do I transfer my existing holdings in another DP to a new Demat account with ICICI Bank?
You need to fill up the regular Transfer Instruction For Debit (TIFD) form available with you or your existing DP and seek transfer of your specific sholding to the new Demat account with ICICI Bank (you should give the new Demat account number in the TIFD as the destination for transfer) while specifying on the form such transaction as an off-market transaction.