HeidelbergCement is a German multinational building materials company headquartered in Heidelberg,Germany. It is a DAX corporation and is one of the largest building materials companies in the world. On 1 July 2016,HeidelbergCement AG completed the acquisition of a 45% shareholding in Italcementi. That acquisition made HeidelbergCement the number one producer of construction aggregates,the number 2 in cement and number 3 in ready mixed concrete worldwide.