British multinational chemicals and sustainable technologies company
Johnson Matthey plc is a British multinational speciality chemicals and sustainable technologies company headquartered in London, England. It is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index. History. Early years. Johnson Matthey traces its origins to 1817, when Percival Norton Johnson set up business as a gold assayer in London. In 1851 George Matthey joined the business and its name was changed to Johnson & Matthey. The following year the firm was appointed official assayer and refiner to the Bank of England.
https://en.wikipedia.org/wiki/Johnson_Matthey