Tata Consultancy Services Limited (TCSL) is a multinational information technology (IT) service, consulting and business solutions company headquartered in India.[4][5] TCS operates in 46 countries.[3] It is a subsidiary of the Tata Group and is listed on the Bombay Stock Exchange and the National Stock Exchange of India. TCS is the largest Indian company by market capitalization[6][7] and is the largest India-based IT services company by 2013 revenues.[8][9] TCS is now placed among the ‘Big 4’ most valuable IT services brands worldwide.[10] TCS is ranked 40th overall in the Forbes World's Most Innovative Companies ranking, making it both the highest-ranked IT services company and the top Indian company.[11] It is the world's 10th largest IT services provider, measured by revenues.