Chief Metropolitan Magistrate Sumit Dass sent Sanjay Jain, Rajiv Jain, Rohit Chaudhary and Sanjeev Agarwal, arrested on the complaint of Punjab National Bank (PNB), to custody till April 22.
The four accused were arrested by CBI earlier in the day, for allegedly using more than 100 shell companies for routing and diversion of bank funds.
The firm and the shell companies had no genuine business transactions, the CBI sources had said.
Over Rs 300 crore of working capital was also allegedly moved to six companies set abroad, it said.