The AmRuKuo Corporation, often abbreviated as the ARK Corporation, was an American multinational energy company on Earth and Mars around the time of the Second Martian Revolution. Judging by its name, the present company was formulated after several mergers, one of which being the acquisition of remaining assets of the once powerful Ultor Corporation. Being a key backer of the Earth Defense Force, AmRuKuo owned much of the property across Tharsis, particularly in the Dust and Oasis sectors. It is also a large manufactor of Tharsis' mining equipment, such as the vehicles and walkers. The vehicles and walkers that are made by Amrukuo are painted yellow and black with the company logo noticeably placed. During the revolution, Amrukuo was almost forced to declare bankruptcy by the Red Faction.