Rio Tinto plc and Rio Tinto Limited established a dual listed companies (DLC) structure in December 1995. As a result, the two companies are managed as a single economic unit, even though both companies continue to be separate legal entities with separate share listings and share registers. Further detail in relation to the DLC structure is set out in the following documents and in our Annual Report (in the Shareholder information section):
The Rio Tinto Group comprises a large number of companies. A list of principal subsidiaries is set out in note 33 of the financial statements in our 2018 Annual Report. Our principal joint operations, principal joint ventures and principal associates are set out in notes 34, 35 and 36.