The charge sheet was filed in the court of special CBI judge Sanjeev Aggarwal in Delhi, naming the two for allegedly providing preferential and unfair access to NSE’s trading system to Delhi-based stock broker OPG Securities Pvt Ltd and its owner, Sanjay Gupta to the detriment of others.

The Central Bureau of Investigation (CBI) on Thursday filed a charge sheet against Chitra Ramkrishna, former chief executive officer of the National Stock Exchange (NSE) and Anand Subramanian, the bourse’s then group operating officer (GOO), in connection with a co-location fraud case, people familiar with the development said.

The charge sheet was filed in the court of special CBI judge Sanjeev Aggarwal in Delhi, naming the two for allegedly providing preferential and unfair access to NSE’s trading system to Delhi-based stock broker OPG Securities Pvt Ltd and its owner, Sanjay Gupta to the detriment of others. Ramkrishna was arrested by CBI on March 6 while Subramanian was arrested on February 25.