CRH plc is an international group of diversified building materials businesses whose headquarters is in Dublin, Ireland. It manufactures and supplies a wide range of products for the construction industry. The group was formed through a 1970 merger of two leading Irish public companies, Cement Limited (established in 1936) and Roadstone Limited (1949). CRH’s primary listings are on the London Stock Exchange (where it is a constituent of the FTSE 100 Index) and on Euronext Dublin (where it is a constituent of the ISEQ 20).