Horizonte Minerals Plc, together with its subsidiaries, engages in the exploration and development of mineral projects in Brazil. The company primarily explores for nickel deposits, as well as cobalt deposits. It holds 100% interest in the Araguaia ferronickel; and the Vermelho Nickel-Cobalt project in the eastern part of the Carajás mining district. The company is headquartered in London, the United Kingdom.