Nehal Chopra 's Ratan Capital Group has filed its 13F with the SEC for the reporting period of March 31. Chopra's public equity portfolio has become increasingly concentrated in recent quarters, which makes her large move into four new stocks rather compelling. Of course, it doesn't hurt that Chopra ran one of the top performing funds in our database during the first quarter, trumping other hedge funds with net returns of 22.5% according to CNBC.