Karamtara Engineering has raised ₹105.7 crore from several investors, including film stars Ranbir Kapoor, Aamir Khan and Karan Johar. Cricketers Jasprit Bumrah and Rohit Sharma also invested in the renewable energy products manufacturer. In January, Karamtara filed a draft red herring prospectus with the SEBI to raise ₹1,750 crore through an IPO.