UltraTech Cement Limited is an Indian cement company based in Mumbai, and a part of Aditya Birla Group. UltraTech is the largest manufacturer of grey cement, ready-mix concrete (RMC) and white cement in India with an installed capacity of 116.75 million tonnes per annum. It is the only company in the world to have a capacity of over 100 million tonnes in a single country, outside of China.