Mindtree Co-Founders Rostow Ravanan, Krishnakumar Natarajan and NS Parthasarathy have resigned from the mid-sized IT company following the hostile takeover by engineering major Larsen & Toubro (L&T). The three serve as CEO, Executive Chairman, and Executive Vice Chairman and Chief Operating Officer (COO) respectively. All of them have also asked Mindtree to declassify them as promoters.