India's most valuable private hotel chain, Gurugram-based OYO has gained a valuation of $10 billion after its 25-year-old Founder Ritesh Agarwal agreed to invest $2 billion to increase his stake. He is buying the shares from existing investors Lightspeed Venture Partners and Sequoia India, reportedly increasing his stake from 10% to 30%. Ritesh Agarwal founded OYO in 2013, aged 19.