Co-founders of IT consultancy firm Mindtree, Krishnakumar Natarajan, Parthasarathy NS and Rostow Ravanan, have created their own $120 million fund to invest in tech startups. It will be structured as a privately pooled investment fund in the form of a trust or a company. The Co-founders had resigned from Mindtree earlier this year following the takeover by Larsen and Toubro.