In the week before the 2011 Indian Grand Prix, Force India announced that the Sahara Group had purchased a 42.5% stake in the team, valued at US$100 million. The investment gave the Sahara Group and team principal Vijay Mallya an equal stake in the team, with team director Michiel Mol controlling the remaining 15% of the team. Under the terms of the sale, the Sahara Group became Force India's naming-rights sponsor. Mercedes GP also changed the name of their team, announcing that they were to become known as Mercedes AMG. The new name originates from AMG, Mercedes-Benz's performance and luxury road car brand.