Johnson Matthey Plc is a multinational company primarily engaged in clean air solutions, advanced catalyst and hydrogen technologies, and services related to platinum group metals (PGMs). Its extensive operations span the United Kingdom, continental Europe, the United States, wider North America, China, Hong Kong, other parts of Asia, and various international locations. The company structures its activities across three core segments. The Clean Air segment is dedicated to developing and supplying catalysts for exhaust after-treatment systems, which are vital for reducing harmful emissions from a broad spectrum of vehicles, including cars, light-duty vehicles, trucks, buses, and non-road machinery powered by both diesel and gasoline. The Efficient Natural Resources segment delivers products and specialized processing services aimed at the effective use and transformation of crucial natural resources like oil, gas, biomass, and platinum group metals. It also focuses on circular economy solutions. Offerings within this division include specialty catalysts and additives, licenses for process technology and engineering designs, comprehensive PGM refining and recycling services, various chemical and industrial products, and other precious metal services. Finally, the Other Markets segment encompasses a diverse range of business areas. These include precious metal pastes and enamels, advanced battery systems, fuel cell technologies, battery materials, and green hydrogen solutions. This segment also leverages scientific and technological expertise to develop products for medical devices, alongside providing detection, diagnostic, and measurement technologies. Founded in 1817 as Johnson & Cock, the company adopted its current name, Johnson Matthey Plc, in 1851 and is headquartered in London, United Kingdom.