John Holt Plc, together with its subsidiaries, assembles, sells, leases, and services power and cooling equipment in Nigeria. It operates through three segments: Technical Products and Leasing Services; Property, Warehousing, and Central; and Yamaco. The company is also involved in sale and servicing of fire fighting vehicles and equipment; boat building; sale and servicing of marine equipment; marine transport; warehousing and distribution services; and property services and construction. In addition, it engages in the sale, installation, maintenance, and lease of HOLT STAR air conditioners for home/industrial consumer electronics market; sale, installation, and maintenance of diesel generators, as well as spare parts; and distribution of fire and safety equipment. The company was founded in 1862 and is headquartered in Lagos, Nigeria.