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Related undertakings (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure Of Interests In Other Entities Explanatory [Abstract] |
Summary of Group's subsidaries, associated undertakings and joint ventures |
Strategic report |  | Governance report |  | Financial statements |  | Production, reserves and operations |  | Additional information
In accordance with section 409 of the Companies Act 2006, disclosed below is a full list of related undertakings of the Group. Related undertakings include “subsidiaries”, “associated undertakings”, and “significant holdings in undertakings other than subsidiary companies”. The registered office address, country of incorporation, classes of shares and the effective percentage of equity owned by the Group calculated by reference to voting rights, is disclosed as at 31 December 2017. The definition of a subsidiary undertaking in accordance with the Companies Act 2006 is different from the definition under IFRS. As a result, the related undertakings included within this list may not be the same as the related undertakings consolidated in the Group IFRS financial statements. Unless otherwise disclosed, all undertakings with an effective equity holding of greater than 50% are considered subsidiary undertakings for the purpose of this note. Refer to notes 33-36 for further information on accounting policies, basis of consolidation, principal subsidiaries, joint operations, joint ventures and associates. An explanation of the dual listed companies structure of Rio Tinto plc and Rio Tinto Limited can be found on pages 250 to 251. For completeness, the effective ownership by the Group relates to effective holdings by both entities either together or individually.
Wholly owned subsidiary undertakings
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
10029734 Canada Inc.; Canada |  | CAD$1.00 Common shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
| CAD$1.00 Preferred shares |  | 100 |
1043802 Ontario Ltd; Canada |  | CAD Ordinary shares |  | 100 |  | 100 |  | 66 Wellington Street West, Suite 4700, Toronto Dominion Bank Tower, Toronto ON M5K 1E6, Canada
1109723 B.C. Ltd. |  | CAD Common shares |  | 100 |  | 100 |  | 1800 - 510 West Georgia Street, Vancouver BC V6B 0M3, Canada
46106 YUKON INC.; Canada |  | CAD Common shares |  | 100 |  | 100 |  | 200-204 Lambert Street, Whitehorse YT Y1A 3T2, Canada
46117 YUKON INC.; Canada |  | CAD Common shares |  | 100 |  | 100 |  | 200-204 Lambert Street, Whitehorse YT Y1A 3T2, Canada
| CAD Preferred shares |  | 100 |  | 100 |
535630 YUKON INC.; Canada |  | CAD Common shares |  | 100 |  | 100 |  | c/o Macdonald & Company, 200-204 Lambert Street, Whitehorse YT Y1A 3T2, Canada
CAD Preferred shares |  | 100 |  | 100 |
7999674 CANADA INC.; Canada |  | CAD Common shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
9230556 CANADA INC.; Canada |  | CAD Common shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
|  | CAD Preferred shares |  | 100 |
9539549 CANADA INC.; Canada |  | US$ Common shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
Alcan Alumina Ltda.; Brazil |  | BRL1.00 Quota shares |  | 100 |  | 100 |  | Avenida Engenheiro Emiliano Macieira, 1—km 18, Pedrinhas, Sao Luis, MA, 65095-603, Brazil
Alcan Asia Limited; Hong Kong |  | HKD Ordinary shares |  | 100 |  | 100 |  | Suite 2802, 28/F, Lippo Centre Tower 2, 89 Queensway, Admiralty, Hong Kong
Alcan Betriebs- und Verwaltungsgesellschaft GmbH; Germany |  | €51.13 Ordinary shares |  | 100 |  | 100 |  | Alusingenplatz 1, D-78221, Singen, Germany
Alcan Chemicals Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Alcan Composites Brasil Ltda; Brazil |  | BRL0.01 Ordinary shares |  | 100 |  | 100 |  | Avenida das Nações Unidas, 10.989, 14th floor, Suite 141, São Paulo, 04578-000, Brazil
Alcan Corporation; United States |  | US$ 0.01 Ordinary shares |  | 100 |  | 100 |  | CSC, 211 East 7th Street, Suite 620, Austin TX 78701-3218, United States
Alcan Farms Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Alcan Finances USA LLC; United States |  | US$1,000.00 Ordinary shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Alcan Gove Development Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Alcan Gove Pty Limited; Australia |  | AUD Class A shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
|  | AUD Class B shares |  | 100 |
Alcan Gove Superannuation Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Notes to the 2017 financial statements continued 46 Related undertakings continued
Wholly owned subsidiary undertakings
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
Alcan Holdings Australia Pty Limited; Australia |  | AUD Class A shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
|  | AUD Ordinary shares |  | 100 |  | 100 |
Alcan Holdings Europe B.V.; Netherlands |  | €455.00 Ordinary shares |  | 100 |  | 100 |  | Welplaatweg 104, 3197 KS , Botlek-Rotterdam, Netherlands
Alcan Holdings Europe B.V.; Netherlands |  | €455.00 Ordinary shares |  | 100 |  | 100 |  | Welplaatweg 104, 3197 KS , Botlek-Rotterdam, Netherlands
Alcan Holdings Nederland B.V.; Netherlands |  | €4,555.00 Ordinary shares |  | 100 |  | 100 |  | Welplaatweg 104, 3197 KS , Botlek-Rotterdam, Netherlands
Alcan Holdings Switzerland AG (SA/Ltd.); Switzerland |  | CHF0.01 Registered shares |  | 100 |  | 100 |  | Herostrasse 9, P.O. Box 1954, CH-8048 Zürich, Switzerland
Alcan International Network U.S.A. Inc.; United States |  | US$ Ordinary shares |  | 100 |  | 100 |  | CSC, 80 State Street, Albany NY 12207-2543, United States
Alcan Lebensmittelverpackungen GmbH; Germany |  | €51.13 Ordinary shares |  | 100 |  | 100 |  | Alusingenplatz 1, D-78221, Singen, Germany
Alcan Management Services (Shanghai) Co., Ltd.; China |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | Unit E, 40F Wheelock Square, No. 1717 West Nanjing Road, Jing’an District, Shanghai, 200040, China
Alcan Management Services Canada Limited/Societe de Services de Gestion Alcan Canada Limitee; Canada |  | CAD Ordinary shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
Alcan Northern Territory Alumina Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Alcan Packaging Canada Limited; Canada |  | CAD Ordinary shares |  | 100 |  | 100 |  | McCarthy Tetrault LLP, c/o Joanne Pierucci, Suite 5300 Toronto Dominion Bank Tower, Toronto ON M5K 1E6, Canada
Alcan Packaging Mühltal Gmbh & Co. KG; Germany |  | €51.13 Ordinary shares |  | 100 |  | 100 |  | Alusingenplatz 1, D-78221, Singen, Germany
Alcan Primary Metal Australia Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Alcan Primary Products Company LLC; United States |  | US$ Units shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Alcan Primary Products Corporation; United States |  | US$0.01 Ordinary shares |  | 100 |  | 100 |  | CSC, 211 East 7th Street, Suite 620, Austin TX 78701-3218, United States
Alcan Realty Limited/Societe Immobiliere Alcan Limitee; Canada |  | CAD Ordinary shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
Alcan South Pacific Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Alcan Trading AG (SA/Ltd.); Switzerland |  | CHF1000 Registered shares |  | 100 |  | 100 |  | Herostrasse 9, P.O. Box 1954, CH-8048 Zürich, Switzerland
Aluminium Dunkerque; France |  | €16.00 Ordinary shares |  | 100 |  | 100 |  | 17 Place des Reflets, La Defense 2, 92400, Courbevoie, France
Aluminium Pechiney; France |  | €16.00 Ordinary shares |  | 100 |  | 100 |  | 725 rue Aristide Bergès, 38341 Voreppe Cedex, France
Aluminum Company of Canada Limited/Aluminium du Canada Limitee; Canada |  | CAD Ordinary shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
AML Properties Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Anglesey Aluminium Limited (Dissolved); United Kingdom(e) |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Anglesey Aluminium Metal Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
AP Service; France |  | €15.00 Ordinary shares |  | 100 |  | 100 |  | 725 rue Aristide Bergès, 38341 Voreppe Cedex, France
Argyle Diamond Mines Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Argyle Diamonds (2013) Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Argyle Diamonds Limited; Australia(a) |  | AUD Class A shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
|  | AUD Class B shares |  | 100 |  |
Wholly owned subsidiary undertakings
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
Ashton Canada Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 37 Belmont Avenue, Belmont WA 6104, Australia
Ashton Mining Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18, Central Park, 152-158 St Georges Terrace, Perth WA 6000, Australia
Ashton Nominees Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Australian Coal Holdings Pty. Limited; Australia(a) |  | AUD A shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
|  | AUD Ordinary shares |  | 100 |
Australian Mining & Smelting Pty Ltd; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Beasley River Management Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Beasley River Mining Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Borax España, S.A.; Spain |  | €150.00 Ordinary shares |  | 100 |  | 100 |  | CN 340, Km 954, 12520 NULES, Castellon, Spain
Borax Europe Limited; United Kingdom |  | £0.25 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Borax Francais; France |  | €2.75 Ordinary shares |  | 100 |  | 100 |  | 89 Route de Bourbourg, 59210, Coudekerque-Branche, France
Borax Malaysia Sdn Bhd; Malaysia |  | MYR1.00 Ordinary shares |  | 100 |  | 100 |  | Level 7, Menara Milenium, Jalan Damanlela, Pusat Bandar Damansara, Damansara Heights 50490 Kuala Lumpur, Malaysia
Borax Rotterdam N.V.; Netherlands |  | €453.78 Ordinary shares |  | 100 |  | 100 |  | Welplaatweg 104, 3197KS, ROTTERDAM –BOTLEK, Netherlands
British Alcan Aluminium Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Canning Resources Pty Limited; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Capricorn Diamonds Investments Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Cathjoh Holdings Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Pacific Aluminium, 123 Albert Street, Brisbane QLD 4000, Australia
Champlain Reinsurance Company Ltd.; Switzerland |  | CHF1.23 Registered shares |  | 100 |  | 100 |  | Herostrasse 9, P.O. Box 1954, CH-8048 Zürich, Switzerland
Channar Management Services Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Channar Mining Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
CIA. Inmobiliaria e Inversiones Cosmos S.A.C.; Peru |  | PEN1,000.00 Ordinary shares |  | 100 |  | 100 |  | Av. Santa Maria No. 110 Urb. Miraflores – MIRAFLORES – LIMA, Peru
Compagnie Générale D’électrolyse Du Palais; France |  | €0.94 Ordinary shares |  | 100 |  | 100 |  | 17 Place des Reflets, La Defense 2, 92400, Courbevoie, France
Compania de Transmision Sierraoriente S.A.C.; Peru |  | PEN1,000.00 Ordinary shares |  | 100 |  | 100 |  | Av. Santa Maria No. 110 Urb. Miraflores – MIRAFLORES – LIMA, Peru
CRA Exploration (India) Private Limited; India |  | INR10.00 Ordinary shares |  | 100 |  | 100 |  | Apartment No.100 A/5, Ground Floor, The Capital Court, Olof Palme Marg, Munirka, NEW DELHI 110067, India
CRA Investments Pty. Limited; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
CRA Pty Ltd; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Daybreak Development LLC; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Daybreak Property Holdings LLC; United States(c) |  | — |  | — |  | 100 |  | CSC, 15 West South Temple, Suite 1701, Salt Lake City UT 84101, United States
Daybreak Secondary Water Distribution Company; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Daybreak Water Holding LLC; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
DB Medical I LLC; United States |  | US$ Units shares |  | 100 |  | 100 |  | CSC, 15 West South Temple, Suite 1701, Salt Lake City UT 84101, United States
DBVC1 LLC; United States(c) |  | — |  | — |  | 100 |  | CSC, 15 West South Temple, Suite 1701, Salt Lake City UT 84101, United States
Diavik Diamond Mines (2012) Inc.; Canada |  | CAD Common shares |  | 100 |  | 100 |  | 300-5201 50th Avenue, PO Box 2498, Yellowknife NT X1A 2P8, Canada
Notes to the 2017 financial statements continued 46 Related undertakings continued
Wholly owned subsidiary undertakings
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
East Kalimantan Coal Pte. Ltd; Singapore(a) |  | SGD1.00 Ordinary shares |  | 100 |  | 100 |  | 12 Marina Boulevard, #20-01 Marina Bay Financial Centre Tower 3, Singapore, 018982, Singapore
|  | US$1.00 Ordinary shares |  | 100 |
Eastland Management Inc.; United States |  | US$1.00 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Electric Power Generation Limited; New Zealand(a) |  | NZD1 Ordinary shares |  | 100 |  | 100 |  | Tiwai Road , Southland via Intercargill, New Zealand
Empresa de Mineracao Finesa Ltda.; Brazil |  | BRL Quotas shares |  | 100 |  | 100 |  | SIA, Trecho 2, Lotes 710/720, Brasilia DF, Brazil
Falcon Insurance Ltd; Malta(a) |  | US$1.00 Class “A” ordinary shares |  | 100 |  | 100 |  | No 7, 4th Floor, Block C, Skyway Offices, 179 Marina Street, Pieta , PTA 9042, Malta
|  | US$1.00 Class “B” shares |  | 100 |
Flambeau Mining Company; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Fundsprops Pty. Limited; Australia(a) |  | AUD A Class ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Gladstone Infrastructure Pty Ltd; Australia |  | AUD Class G Redeemable Preference shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
|  | AUD A Class ordinary shares |  | 100 |
Gove Aluminium Ltd; Australia |  | AUD A Non redeemable preference shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
|  | AUD A Redeemable preference shares |  | 100 |
|  | AUD Ordinary shares |  | 100 |
GPS Energy Pty Limited; Australia |  | AUD ordinary shares |  | 100 |  | 100 |  | Pacific Aluminium, 123 Albert Street, Brisbane QLD 4000, Australia
GPS Nominee Pty Limited; Australia |  | AUD ordinary shares |  | 100 |  | 100 |  | Pacific Aluminium, 123 Albert Street, Brisbane QLD 4000, Australia
GPS Power Pty. Limited; Australia |  | AUD ordinary shares |  | 100 |  | 100 |  | Pacific Aluminium, 123 Albert Street, Brisbane QLD 4000, Australia
Hail Creek Coal Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Hamersley Exploration Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Hamersley HMS Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Hamersley Holdings Limited; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Hamersley Iron – Yandi Pty Limited; Australia(a) |  | AUD Class B shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
|  | AUD Class C shares |  | 100 |
|  | AUD Ordinary shares |  | 100 |
Hamersley Iron Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Hamersley Resources Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
|  | AUD Z Class ordinary shares |  | 100 |
Hamersley WA Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Henlopen Manufacturing Co., Inc.; United States |  | US$100.00 Ordinary shares |  | 100 |  | 100 |  | CSC, 80 State Street, Albany NY 12207-2543, United States
High Purity Iron Inc.; United States |  | US$1.00 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
HIsmelt Corporation Pty Limited; Australia(a) |  | AUD Class A shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Wholly owned subsidiary undertakings
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
Hunter Valley Resources Pty Ltd; Australia |  | AUD A Class shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
|  | AUD B Class shares |  | 100 |
IEA Coal Research Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | Apsley House, Third Floor, 176 Upper Richmond Road, London, SW15 2SH, United Kingdom
IEA Environmental Projects Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | IEAGHG, Pure Offices Cheltenham Office Park, Hatherley Lane, Cheltenham, GL51 6SH, United Kingdom
Industrias Metalicas Castello S.A.; Spain |  | €6.01 Ordinary shares |  | 100 |  | 100 |  | Calle Tuset 10, 08006, Barcelona, Catalogna, Spain
Integrity Land and Cattle LLC; United States |  | US$ Units shares |  | 100 |  | 100 |  | CSC, 2338 W. Royal Palm Road, Suite J, Phoenix AZ 85021
Itallumina Srl; Italy(d) |  | €1.00 Quotas shares |  | 100 |  | 100 |  | Viale Castro Pretorio 122, 00185, Roma, Italy
Johcath Holdings Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Pacific Aluminium, 123 Albert Street, Brisbane QLD 4000, Australia
Juna Station Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Kalimantan Gold Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Kalteng Pty. Ltd; Australia(a) |  | AUD A Class ordinary shares |  | 100 |  | 100 |  | 37 Belmont Avenue, Belmont WA 6104, Australia
|  | AUD1.00 Class B (Fully paid $1.00 13/01/2003) |  | 100 |
|  | AUD1.00 Class B (Paid to $0.12 02/09/2005) |  | 100 |
|  | AUD Ordinary shares |  | 100 |
Kelian Investment Limited; British Virgin Islands(c)(e) |  | — |  | — |  | 100 |  | Woodbourne Hall, Road Town, Tortola, British Virgin Islands
Kelian Pty. Limited; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Kembla Coal & Coke Pty. Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Kennecott Barneys Canyon Mining Company; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Kennecott Exploration Company; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Kennecott Exploration Mexico, S.A. de C.V.; Mexico |  | MXN1,000.00 Ordinary shares |  | 100 |  | 100 |  | Felix Berenguer 125 – 4,Col.Lomas Virreyes, Distrito Federal, 11000, Mexico
Kennecott Holdings Corporation; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Kennecott Land Company; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Kennecott Land Investment Company LLC; United States(c) |  | — |  | — |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Kennecott Molybdenum Company; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Kennecott Nevada Copper Company; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Kennecott Ridgeway Mining Company; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Kennecott Royalty Company; United States |  | US$100.00 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Kennecott Services Company; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Kennecott Uranium Company; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Kennecott Utah Copper LLC; United States |  | US$ Units shares |  | 100 |  | 100 |  | CSC, 15 West South Temple, Suite 1701, Salt Lake City UT 84101, United States
Kennecott Water Distribution LLC; United States |  | US$ Ordinary shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Kestrel Coal Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Kestrel Coal Sales Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Kutaibar Holdings Pty Ltd; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Notes to the 2017 financial statements continued 46 Related undertakings continued
Wholly owned subsidiary undertakings
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
Lawson Mardon Flexible Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Lawson Mardon Smith Brothers Ltd.; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Metallwerke Refonda AG; Switzerland |  | CHF125 Bearer shares |  | 100 |  | 100 |  | Herostrasse 9, P.O. Box 1954, CH-8048 Zürich, Switzerland
Metals & Minerals Insurance Pte. Limited; Singapore |  | SGD Redeemable preference shares |  | 100 |  | 100 |  | 2 Shenton Way, #2601, SGX Centre 1, Singapore 068804, Singapore
|  | SGD Ordinary shares |  | 100 |
Mineracao Tabuleiro Ltda; Brazil |  | BRL Quotas shares |  | 100 |  | 100 |  | SIA, Trecho 2, Lotes 690/720, Brasilia DF, Brazil
Minera Kennecott, S.A.de C.V.; Mexico |  | MXN1 Series “B” shares |  | 100 |  | 100 |  | Florencia 57,Piso 3,Col.Juarez, Delegacion Cuauhtemoc, Mexico, D.F., 06600, Mexico
Mitchell Plateau Bauxite Co. Pty. Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Mount Bruce Mining Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Mount Pleasant Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Mutamba Mineral Sands S.A.; Mozambique |  | MZN100.00 Ordinary shares |  | 100 |  | 100 |  | Avenida 24 de Julho, no. 3412, Bairro da Polana Cimento, Maputo City, Mozambique
NBH Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Nhulunbuy Corporation Limited; Australia(c) |  | — |  | — |  | 100 |  | 19 Westal Street, Nhulunbuy NT 0880, Australia
Norgold Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
|  | Redeemable Preference |  | 100 |
North Gold (W.A.) Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
|  | AUD Redeemable preference shares |  | 100 |
North Insurances Pty. Ltd.; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
North IOC (Bermuda) Holdings Limited; Bermuda |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | Clarendon House, 2 Church Street, Hamilton, HM 11, Bermuda
North IOC (Bermuda) Limited; Bermuda |  | US$143.64 Class A ordinary shares |  | 100 |  | 100 |  | Clarendon House, 2 Church Street, Hamilton, HM 11, Bermuda
|  | US$100,000.00 Preferred shares |  | 100 |
|  | US$1.00 Ordinary shares |  | 100 |
North IOC Holdings Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
North Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
North Mining Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
|  | AUD Redeemable preference shares |  | 100 |
Pacific Aluminium (New Zealand) Limited; New Zealand |  | NZD1 Ordinary shares |  | 100 |  | 100 |  | Level 6, 109 Featherston Street, Wellington, 6011, New Zealand
Pacific Aluminium Bell Bay Sales Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Pacific Aluminium, 123 Albert Street, Brisbane QLD 4000, Australia
Pacific Aluminium Pty. Limited; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Pacific Aluminium Services Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Pacific Aluminium, 123 Albert Street, Brisbane QLD 4000, Australia
Pacific Coast Mines, Inc.; United States |  | US$1.00 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Pechiney Aviatube Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Pechiney Bâtiment; France |  | €15.00 Ordinary shares |  | 100 |  | 100 |  | 725 rue Aristide Bergès, 38341 Voreppe Cedex, France
Wholly owned subsidiary undertakings |  |  |  |  |  |  |  |
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
Pechiney Bécancour, Inc.; United States |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Pechiney Cast Plate, Inc.; United States |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Pechiney Consolidated Australia Pty Limited; Australia |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
|  | US$1.00 Preference shares |  | 100 |
Pechiney Dis Ticaret Limited Sirketi; Turkey(d) |  | TRY25.00 Ordinary shares |  | 100 |  | 100 |  | Karakoy Haci Mimi Mah. Vekil Harc Sok. 10 Kat 4, Beyoglu, Istanbul, Turkey
Pechiney Holdings, Inc.; United States |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Pechiney Metals LLC; United States(c) |  | — |  | — |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Pechiney Plastic Packaging, Inc.; United States |  | US$ Ordinary shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Pechiney Sales Corporation; United States |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Peko Exploration Pty Ltd.; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 37 Belmont Avenue, Belmont WA 6104, Australia
Peko-Wallsend Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Pilbara Iron Company (Services) Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Pilbara Iron Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Port d’Ehoala S.A.; Madagascar |  | US$100.00 Ordinary shares |  | 100 |  | 100 |  | Immeuble ASSIST, Ivandry , Lot N°35, 5ème étage, 101 Antananarivo , Antananarivo, Madagascar
Project Generation Group Pty Ltd; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
PSZ Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
PT Alcan Packaging Flexipack; Indonesia(d) |  | IDR1,000,000.00 Ordinary shares |  | 100 |  | 100 |  | 31st Floor, Menara BTPN, Jl. Dr. Ide Anak Agung Gde Agung Lot 5.5-5.6, Mega Kuningan, Jakarta, 12950, Indonesia
PT Rio Tinto Consultants; Indonesia(d) |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 31st Floor, Menara BTPN, Jl. Dr. Ide Anak Agung Gde Agung Lot 5.5-5.6, Mega Kuningan, Jakarta, 12950, Indonesia
PT Rio Tinto Exploration; Indonesia(d) |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 15th Floor, Menara Anugrah, Kantor Taman E3.3, Jalan DR. Ide Anak Agung Gde Agung Lot 8.6-8.7, Jakarta, 12950, Indonesia
PT Rio Tinto Indonesia; Indonesia |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 31st Floor, Menara BTPN, Jl. Dr. Ide Anak Agung Gde Agung Lot 5.5-5.6, Mega Kuningan, Jakarta, 12950, Indonesia
PT Rio Tinto Irja; Indonesia(d) |  | US$1.00 Ordinay shares |  | 100 |  | 100 |  | 31st Floor, Menara BTPN, Jl. Dr. Ide Anak Agung Gde Agung Lot 5.5-5.6, Mega Kuningan, Jakarta, 12950, Indonesia
QIT Madagascar Minerals Ltd; Bermuda |  | US$1.00 Ordinay shares |  | 100 |  | 100 |  | Canon’s Court, 22 Victoria Street, Hamilton, HM 12, Bermuda
Queensland Coal Pty. Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Química e Metalúrgica Mequital Ltda.; Brazil |  | BRL Ordinary shares |  | 100 |  | 100 |  | Av. das Nacoes Unida, 12551 19o, andar, CJ 1911, 04578-000, Sao Paulo, SP, Brazil
Ranges Management Company Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Ranges Mining Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Resolution Copper Company; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Richards Bay Mining Holdings (Proprietary) Limited; South Africa |  | ZAR1.00 A Ordinary shares |  | 100 |  | 100 |  | The Farm RBM, Number 16317, KwaZulu-Natal, South Africa
|  | ZAR1.00 B Ordinary shares |  | 100 |
Richards Bay Titanium Holdings (Proprietary) Limited; South Africa |  | ZAR1.00 A Ordinary shares |  | 100 |  | 100 |  | The Farm RBM, Number 16317, KwaZulu-Natal, South Africa
|  | ZAR1.00 B Ordinary shares |  | 100 |
Notes to the 2017 financial statements continued 46 Related undertakings continued
Wholly owned subsidiary undertakings
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
Rio de Contas Desenvolvimentos Minerais Ltda; Brazil |  | BRL Quota shares |  | 100 |  | 100 |  | Rua Coronel Durval Matos, S/N. Centro, Municipio de Jaguaquara, Estado da Bahia, CEP45345-000, Brazil
Rio Santa Rita Empreenimentos e-Particiacoes Ltda |  | BRL Quota shares |  | 100 |  | 100 |  | SIA, Trecho 2, Lotes 690/720, Brasilia, DF, Brazil
Rio Sava Exploration DOO; Serbia(c) |  | — |  | — |  | 100 |  | Resavska 23, 11000 Beograd, Beograd, 11000, Serbia
Rio Tinto (Commercial Paper) Limited; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Rio Tinto (Hong Kong) Ltd; Hong Kong |  | HKD Ordinary shares |  | 100 |  | 100 |  | Suite 2802, 28/F, Lippo Centre Tower 2, 89 Queensway, Admiralty, Hong Kong
Rio Tinto (Mauritius) Pty Limited; Mauritius(d) |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 6th Floor, Tower A, 1 Cybercity, Ebene, Mauritius
Rio Tinto Advisory Services Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Rio Tinto Alcan Fund Inc.; Canada |  | CAD Ordinary shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
Rio Tinto Alcan Inc.; Canada |  | CAD Common shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
Rio Tinto Alcan International Ltd. / Rio Tinto Alcan International Ltee; Canada |  | CAD Common shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
Rio Tinto Alcan Middle East DMCC; United Arab Emirates |  | AED1,000 Ordinary shares |  | 100 |  | 100 |  | Gold Tower, Jlt Cluster I, 8th Floor, Unit E, Dubai, PO BOX 340801, United Arab Emirates
Rio Tinto Alcan Technology Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Rio Tinto Almazpoisk LLC; Russian Federation(c)(d) |  | — |  | — |  | 100 |  | 3, Aleksandra Lukyanova, 105066, Moscow, Russian Federation
Rio Tinto Aluminium (Bell Bay) Limited; Australia |  | AUD 7.5% Cumulative preference shares |  | 100 |  | 100 |  | Pacific Aluminium, Level 3, 500 Queen Street, Brisbane QLD 4000, Australia
| AUD Ordinary shares |  | 100 |
Rio Tinto Aluminium (Holdings) Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Rio Tinto Aluminium Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Rio Tinto America Holdings Inc.; United States |  | US$0.01 Class A common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
| US$100.00 Series A preferred stock |  | 100 |
Rio Tinto America Inc.; United States |  | US$100.00 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Rio Tinto Asia Ltd; Hong Kong |  | HKD Ordinary shares |  | 100 |  | 100 |  | Suite 2802, 28/F, Lippo Centre Tower 2, 89 Queensway, Admiralty, Hong Kong
Rio Tinto Asia Pty. Limited.; Australia(a) |  | AUD Class A shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
| AUD Ordinary shares |  | 100 |
Rio Tinto AuM Company; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Rio Tinto Australian Holdings Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
| US$1.00 Ordinary shares |  | 100 |
Rio Tinto Bahia Holdings Limited; United Kingdom |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Base Metals Pty. Limited; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Rio Tinto Brazilian Holdings Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
| US$1.00 Ordinary shares |  | 100 |
Rio Tinto Brazilian Investments Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
| US$1.00 Ordinary shares |  | 100 |
Rio Tinto Canada Diamond Operation Management Inc.; Canada |  | CAD Common shares |  | 100 |  | 100 |  | 300-5201 50th Avenue, PO Box 2498, Yellowknife NT X1A 2P8, Canada
Rio Tinto Canada Inc; Canada |  | CAD Class B shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
| CAD Class C shares |  | 100 |
| CAD Class D shares |  | 100 |
| CAD Class J Shares |  | 100 |
| Class K Shares |  | 100 |
Wholly owned subsidiary undertakings
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
Rio Tinto Canada Management Inc./ Rio Tinto Gestion Canada Inc.; Canada |  | CAD Common shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
| CAD Preferred shares |  | 100 |  |
Rio Tinto Canada Uranium Corporation; Canada |  | CAD Common shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
Rio Tinto Coal (Clermont) Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Rio Tinto Coal Australia Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Rio Tinto Coal Investments Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Rio Tinto Coal NSW Holdings Limited; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Rio Tinto Desenvolvimentos Minerais LTDA.; Brazil |  | BRL Quotas shares |  | 100 |  | 100 |  | SIG Quadra 04, Lote 175, Torre A, Salas 106 a 109, Edificio Capital Financial Center, Brasilia, CEP 70610-440, Brazil
Rio Tinto Diamonds and Minerals Canada Holding Inc.; Canada |  | CAD Class A (dividend rights) |  | 100 |  | 100 |  | 300-5201 50th Avenue, PO Box 2498, Yellowknife NT X1A 2P8, Canada
| CAD Class B shares |  | 100 |
| CAD Class C (voting rights) shares |  | 100 |
| CAD Class P1 preferred shares |  | 100 |
Rio Tinto Diamonds Limited; United Kingdom |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Diamonds Netherlands B.V.; Netherlands |  | €500.00 Ordinary shares |  | 100 |  | 100 |  | Welplaatweg 104, 3197 KS , Botlek-Rotterdam, The Netherlands, Netherlands
Rio Tinto Diamonds NV; Belgium |  | € Ordinary shares |  | 100 |  | 100 |  | Hoveniersstraat 53, 2018 Antwerp, Belgium
Rio Tinto Eastern Investments B.V.; Netherlands |  | €13,418,899,730 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Energy America Inc.; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Rio Tinto Energy Limited; United Kingdom |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Escondida Limited; Bermuda |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 22 Canon’s Court, Victoria Street, Hamilton, HM 12, Bermuda
Rio Tinto European Holdings Limited; United Kingdom(b) |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Exploration (Asia) Holdings Pte. Ltd.; Singapore |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 12 Marina Boulevard, #20-01 Marina Bay Financial Centre Tower 3, Singapore, 018982, Singapore
Rio Tinto Exploration (PNG) Limited; Papua New Guinea(a) |  | PGK1.00 Ordinary shares |  | 100 |  | 100 |  | c/o BDO Accountants, Section 15, Lot 15, Bernal Street, National Capital District, Papua New Guinea
Rio Tinto Exploration and Mining (India) Private Limited; India |  | INR10.00 Ordinary shares |  | 100 |  | 100 |  | 21st Floor, DLF Building No.5, Tower A, DLF Cyber City, Phase –III, Gurgaon, Haryana, 122002, India
Rio Tinto Exploration Canada Inc.; Canada |  | CAD Class A shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
| CAD Class B shares |  | 100 |
| CAD Class C shares |  | 100 |
| CAD Class D shares |  | 100 |
| CAD Class E preferred shares |  | 100 |
Rio Tinto Exploration Gabon SA; Gabon(d) |  | XAF10,000 Ordinary shares |  | 100 |  | 100 |  | C/O NEW ACE Baker Tilly, Quartier Louis – Quaben,Libreville,B.P :3981 ,Gabon
Rio Tinto Exploration India Private Limited; India |  | INR10.00 Ordinary shares |  | 100 |  | 100 |  | Apartment No.100 A/5, Ground Floor, The Capital Court, Olof Palme Marg, Munirka, NEW DELHI 110067, India
Rio Tinto Exploration Kazakhstan LLP; Kazakhstan(c) |  | — |  | — |  | 100 |  | Dostyk 310/G, Almaty, 050020, Kazakhstan
Rio Tinto Exploration Pty Limited; Australia(a) |  | AUD Class B shares |  | 100 |  | 100 |  | 37 Belmont Avenue, Belmont WA 6104, Australia
| AUD Class C shares |  | 100 |
| AUD Ordinary shares |  | 100 |
Rio Tinto Exploration Zambia Limited; Zambia |  | ZMW1.00 Ordinary shares |  | 100 |  | 100 |  | Plot 3827, Parliament Road, Olympia, Lusaka,Zambia
Notes to the 2017 financial statements continued 46 Related undertakings continued
Wholly owned subsidiary undertakings
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
Rio Tinto Fer et Titane inc.; Canada |  | CAD Class B preference shares |  | 100 |  | 100 |  | 1625 Route Marie-Victorin, Sorel-Tracy QC J3R 1M6, Canada
| CAD Common shares |  | 100 |
| CAD$0.01 Preferred shares |  | 100 |
Rio Tinto FH Limited; United Kingdom(d) |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Finance (USA) Limited; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Rio Tinto Finance (USA) plc; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto PACE Canada Inc./Gestion Rio Tinto PACE Canada Inc.; Canada |  | CAD Ordinary shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
Rio Tinto Finance Limited; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000,Australia
Rio Tinto Finance plc; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
| US$1.00 Ordinary shares |  | 100 |
Rio Tinto France S.A.S.; France |  | €15.25 Ordinary shares |  | 100 |  | 100 |  | 17 Place des Reflets, La Defense 2, 92400,Courbevoie, France
Rio Tinto Global Employment Company Pte. Ltd.; Singapore |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 12 Marina Boulevard, #20-01 Marina Bay Financial Centre Tower 3, Singapore, 018982, Singapore
Rio Tinto Guinée S.A.; Guinea |  | GNF100,000.00 Ordinary shares |  | 100 |  | 100 |  | Route de la Corniche Nord, Cité Ministérielle—Rue DI 256 Quartier Landréah, Commune de Dixinn—BP 99,Conakry, Guinea
Rio Tinto Holdings LLC; Mongolia |  | MNT20,000.00 Ordinary shares |  | 100 |  | 100 |  | Monnis Tower 13th floor, Chinggis Avenue-15, SBD, Ulaanbaatar-14240, Mongolia
Rio Tinto Hydrogen Energy Australia Pty Limited; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000,Australia
Rio Tinto Hydrogen Energy LLC; United States(c) |  | — |  | — |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Rio Tinto Iceland Ltd.; Iceland |  | ISK1.00 Registered shares |  | 100 |  | 100 |  | P.O. Box 244, IS-222, Hafnarfjördur, Iceland
Rio Tinto India Private Limited; India |  | INR10.00 Ordinary shares |  | 100 |  | 100 |  | Apartment No.100 A/5, Ground Floor, The Capital Court, Olof Palme Marg, Munirka, NEW DELHI 110067, India
Rio Tinto Indonesian Holdings Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
| US$1.00 Ordinary shares |  | 100 |
Rio Tinto International Holdings Limited; United Kingdom(b) |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto International Trading (Shanghai) Co Ltd; China(d) |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | Room 1615-3, No. 1 Jilong Road, China (Shanghai) Pilot Free Trade Zone, Shanghai, 200031, China
Rio Tinto Investments One Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Rio Tinto Investments Two Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Rio Tinto Iron & Titanium (Suzhou) Co., Ltd; China |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 418 Nanshi Street, Suzhou Industrial Park, Suzhou,215021, China
Rio Tinto Iron & Titanium GmbH; Germany(c) |  | — |  | — |  | 100 |  | Mergenthalerallee 77, D-65760, Eschborn, (Frankfurt am Main), Germany
Rio Tinto Iron & Titanium Holdings GmbH; Germany(c) |  | — |  | — |  | 100 |  | Mergenthalerallee 77, D-65760, Eschborn, (Frankfurt am Main), Germany
Rio Tinto Iron & Titanium Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Iron and Titanium Canada Inc./Rio Tinto Fer et Titane Canada Inc.; Canada |  | CAD Common shares |  | 100 |  | 100 |  | 1625 Route Marie-Victorin, Sorel-Tracy QC J3R 1M6, Canada
Rio Tinto Iron Ore Asia Pte Ltd; Singapore |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 12 Marina Boulevard, #20-01 Marina Bay Financial Centre Tower 3, Singapore, 018982, Singapore
Rio Tinto Iron Ore Atlantic Limited; United Kingdom |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Iron Ore Europe S.A.S.; France |  | €100.00 Ordinary shares |  | 100 |  | 100 |  | 17 Place des Reflets, La Defense 2, 92400,Courbevoie, France
Wholly owned subsidiary undertakings
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
Rio Tinto Iron Ore Trading China Limited; United Kingdom |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Japan Ltd; Japan |  | JPY500 Ordinary shares |  | 100 |  | 100 |  | 8th Floor, Kojimachi Diamond Building, 1 Kojimachi 4-chome, Chiyoda-ku, Tokyo 102-0083, Japan
Rio Tinto Jersey Holdings 2010 Limited; Jersey |  | US$ Ordinary shares |  | 100 |  | 100 |  | 22 Grenville Street, St Helier, JE4 8PX, Jersey
Rio Tinto Korea Ltd; Republic of Korea |  | KRW10,000.00 Ordinary shares |  | 100 |  | 100 |  | 2nd Floor, JS Tower, 6 Teheran-ro 79-gil,Gangnam-Gu, Seoul, 135-877, Republic of Korea
Rio Tinto Logistic Services Pty Ltd; Australia(a)(g) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000,Australia
Rio Tinto London Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Management Services South Africa (Proprietary) Ltd; South Africa |  | ZAR2.00 Ordinary shares |  | 100 |  | 100 |  | 1 Harries Road, Illovo, Sandton, 2196, Sandton,South Africa, 2196, South Africa
Rio Tinto Marketing Pte. Ltd.; Singapore |  | SGD$1.00 Ordinary shares |  | 100 |  | 100 |  | 12 Marina Boulevard, #20-01 Marina Bay Financial Centre Tower 3, Singapore, 018982, Singapore
| US$1.00 Ordinary shares |  | 100 |
Rio Tinto Marketing Services Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Medical Plan Trustees Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Metals Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
| US$1.00 Ordinary shares |  | 100 |
Rio Tinto Minera Peru Limitada SAC; Peru |  | PEN100.00 Ordinary shares |  | 100 |  | 100 |  | Av. La Paz 1049, Oficina 501, Lima 18, Peru
Rio Tinto Mineracao do Brasil Ltda; Brazil |  | BRL1 Quotas shares |  | 100 |  | 100 |  | SIG Quadra 04, Lote 175, Torre A, Salas 106 a 109,Edificio Capital Financial Center, Brasilia, Brasilia,CEP 70610-440, Brazil
Rio Tinto Minerals Asia Pte Ltd; Singapore |  | SGD$1.00 Ordinary shares |  | 100 |  | 100 |  | 12 Marina Boulevard, #20-01 Marina Bay Financial Centre Tower 3, Singapore, 018982, Singapore
| US$1.00 Ordinary shares |  | 100 |
Rio Tinto Minerals Development Limited; United Kingdom |  | £0.25 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Minerals Exploration (Beijing) Co., Ltd; China |  | US$ 1.00 Ordinary shares |  | 100 |  | 100 |  | Units 15 - 16, 18/F, China World Office Building 2, No. 1 Jianguomenwai Dajie, Chaoyang District, Beijing, China
Rio Tinto Minerals Inc.; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 15 West South Temple, Suite 1701, Salt Lake City UT 84101, United States
Rio Tinto Mining and Exploration Inc.; United States |  | US$1.00 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Rio Tinto Mining and Exploration Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
| US$1.00 Ordinary shares |  | 100 |
Rio Tinto Mining and Exploration S.A.C.; Peru |  | PEN0.5 Ordinary shares |  | 100 |  | 100 |  | Calle General Borgono N 1034, Miraflores, Lima 18, Peru
Rio Tinto Namibian Holdings Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Nickel Company; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Rio Tinto Nominees Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto OT Management Limited; United Kingdom |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Overseas Holdings Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
| US$1.00 Ordinary shares |  | 100 |
Rio Tinto Pension Investments Limited; United Kingdom(b) |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Peru Limited; United Kingdom |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Potash Management Inc./Rio Tinto Potasse Management Inc.; Canada |  | CAD Common shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
Rio Tinto Procurement (Singapore) Pte Ltd; Singapore |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 12 Marina Boulevard, #20-01 Marina Bay Financial Centre Tower 3, Singapore, 018982, Singapore
Notes to the 2017 financial statements continued 46 Related undertakings continued
Wholly owned subsidiary undertakings
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
Rio Tinto Pte Ltd; Singapore |  | SGD$1.00 Ordinary shares |  | 100 |  | 100 |  | 12 Marina Boulevard, #20-01 Marina Bay Financial Centre Tower 3, Singapore, 018982, Singapore
| SGD$1.00 Preference shares |  | 100 |  |
Rio Tinto Saskatchewan Management Inc.; Canada |  | CAD Common shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
Rio Tinto Saskatchewan Potash Holdings General Partner Inc.; Canada |  | CAD Common shares |  | 100 |  | 100 |  | McCarthy Tetrault LLP, Suite 5300, TD Bank Tower 66 Wellington Street West, Toronto ON M5K 1E6, Canada
Rio Tinto Saskatchewan Potash Holdings Limited Partnership; Canada(c) |  | — |  | — |  | 100 |  | McCarthy Tetrault LLP, Suite 5300, TD Bank Tower 66 Wellington Street West, Toronto ON M5K Canada 1E6, Canada
Rio Tinto Secretariat Limited |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James's Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Services Inc.; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Rio Tinto Services Limited; Australia(a) |  | AUD Class Z shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
| AUD Ordinary shares |  | 100 |
Rio Tinto Shared Services Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Rio Tinto Shipping (Asia) Pte. Ltd.; Singapore |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 12 Marina Boulevard, #20-01 Marina Bay Financial Centre Tower 3, Singapore, 018982, Singapore
Rio Tinto Shipping Pty. Limited.; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Rio Tinto Simfer UK Limited; United Kingdom |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Singapore Holdings Pte Ltd; Singapore |  | SGD$1.00 Ordinary shares |  | 100 |  | 100 |  | 12 Marina Boulevard, #20-01 Marina Bay Financial Centre Tower 3, Singapore, 018982, Singapore
| US$ Ordinary shares |  | 100 |
Rio Tinto South East Asia Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
| US$1.00 Ordinary shares |  | 100 |
Rio Tinto Staff Fund Pty Limited; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Rio Tinto Sulawesi Holdings Limited; United Kingdom |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Technological Resources Inc.; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Rio Tinto Technological Resources UK Limited; United Kingdom |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Trading (Shanghai) Co., Ltd.; China |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 41/F Wheelock Square, No. 1717 West Nanjing Road, Jing’ an District, Shanghai, 200040, China
Rio Tinto Uranium Limited; United Kingdom |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Vostok Limited; United Kingdom |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Rio Tinto Western Holdings Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
| US$1.00 Ordinary shares |  | 100 |
Riversdale Connections (Proprietary) Ltd; South Africa |  | ZAR1.00 Ordinary shares |  | 100 |  | 100 |  | Ground Floor – Cypress Place North, Woodmead Business Park140/142 Western Service Road, Woodmead, 2191, South Africa
Robe River Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Rocklea Station Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
RTA AAL Australia Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
RTA Boyne Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Pacific Aluminium, Level 3, 500 Queen Street, Brisbane QLD 4000, Australia
RTA Holdco 1 Limited; United Kingdom |  | US$ 0.0001 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Wholly owned subsidiary undertakings
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
RTA Holdco 4 Limited; United Kingdom |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
US$0.73 Ordinary shares |  | 100 |
RTA Holdco 7 Limited; United Kingdom |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
| US$ Class A preference shares |  | 100 |
RTA Holdco 8 Limited; United Kingdom |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
| US$ Class A preference shares |  | 100 |
RTA Holdco Australia 1 Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
RTA Holdco Australia 3 Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
RTA Holdco Australia 5 Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
RTA Holdco Australia 6 Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
RTA Holdco France 2017 S.A.S.; France |  | € 10.00 Ordinary shares |  | 100 |  | 100 |  | 17 Place des Reflets, La Defense 2, 92400, Courbevoie, France
RTA Pacific Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
RTA Sales Pty Ltd; Australia |  | AUD Class A shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
| AUD Class B shares |  | 100 |
RTA Smelter Development Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
RTA Weipa Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
RTA Yarwun Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
RTAlcan 1 LLC; United States |  | US$ Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
| US$ Class A preferred shares |  | 100 |
RTAlcan 2 LLC; United States |  | US$ Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
RTAlcan 3 LLC; United States |  | US$ Common shares |  | 100 |  | 100 |  | CSC, 2711 Centerville Road, Suite 400, Wilmington DE 19808
RTLDS Aus Pty. Ltd; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
RTLDS UK Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
RTMDC LLC; Mongolia |  | MNT1,240.00 Common shares |  | 100 |  | 100 |  | 7 floor, Seoul Business Centre, Zaluuchuud avenue – 26, 1st khoroo, Bayanzurkh district, Ulaanbaatar, 13381, Mongolia
RTPDS Aus Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Savoie Services Y.K.; Japan |  | JPY50,000 Ordinary shares |  | 100 |  | 100 |  | Harumi, 3 Nagahama-cho, Ozu-city, Ehime-ken, 799-3412, Japan
Scheuch Unterstuetzungskasse GmbH; Germany |  | €51.13 Ordinary shares |  | 100 |  | 100 |  | Alusingenplatz 1, D-78221, Singen, Germany
Skeleton Coast Diamonds Limited; Namibia |  | NAD2.00 Ordinary shares |  | 100 |  | 100 |  | 360 Sam Nujoma Drive, Klein Windhoek, Windhoek, Namibia
Skymont Corporation; United States |  | US$ Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Société De Financement Des Risques Industriels; Luxembourg |  | € Ordinary shares |  | 100 |  | 100 |  | 534, rue de Neudorf, B.P. 593, Luxembourg, L-2015, Luxembourg
Société D’entreprises, Carriéres Et Mines De L’Esterel; France |  | €9.33 Ordinary shares |  | 100 |  | 100 |  | 17 Place des Reflets, La Defense 2, 92400, Courbevoie, France
Société Générale de Recherches et d’exploitations Minières; France |  | €0.22 Ordinary shares |  | 100 |  | 100 |  | 17 Place des Reflets, La Defense 2, 92400, Courbevoie, France
Société Immobilière Alpes Provence; France |  | €15.00 Ordinary shares |  | 100 |  | 100 |  | 17 Place des Reflets, La Defense 2, 92400, Courbevoie, France
Sohio Western Mining Company; United States |  | US$100.00 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Notes to the 2017 financial statements continued 46 Related undertakings continued
Wholly owned subsidiary undertakings
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
Southern Copper Pty. Limited; Australia |  | AUD A shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
| AUD B shares |  | 100 |
| AUD Non cumulative redeemable preference shares |  | 100 |
| AUD Ordinary shares |  | 100 |
Swift Current Land & Cattle LLC; United States(c) |  | — |  | — |  | 100 |  | CSC, 2338 W. Royal Palm Road, Suite J, Phoenix AZ 85021
Swiss Aluminium Australia Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
| AUD Stock Unit A shares |  | 100 |
| AUD Stock Unit B shares |  | 100 |
| AUD Stock Unit C shares |  | 100 |
TBAC Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Technological Resources Pty. Limited; Australia(a) |  | AUD A Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
| AUD B Ordinary shares |  | 100 |
The Barrier Corporation (Vic.) Pty. Limited; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
The Kelian Community and Forest Protection Trust; Singapore(c) |  | — |  | — |  | 100 |  | 10 Collyer Quay, #10-01 Ocean Financial Centre, 049315, Singapore
The Pyrites Company, Inc.; United States |  | US$1.00 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
The Roberval and Saguenay Railway Company/La Compagnie du Chemin de Fer Roberval Saguenay; Canada |  | CAD$100.00 Ordinary shares |  | 100 |  | 100 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
| CAD$100.00 Preference shares 6% non-cumulative |  | 100 |
The Zinc Corporation Pty Ltd; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
| AUD Z Class ordinary shares |  | 100 |
Thos. W. Ward Limited; United Kingdom |  | £0.25 Ordinary shares |  | 100 |  | 100 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
Three Crowns Insurance Company Limited; Bermuda |  | £1.00 Common shares |  | 100 |  | 100 |  | Canon’s Court, 22 Victoria Street, Hamilton, HM 12, Bermuda
Tinto Holdings Australia Pty. Limited; Australia |  | AUD A shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
| AUD Ordinary shares |  | 100 |
Trans Territory Pipeline Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
U.S. Borax Inc.; United States |  | US$0.10 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Union Générale Industrielle Africaine; Morocco |  | MAD100.00 Ordinary shares |  | 100 |  | 100 |  | 52 bld Zerktouni – 1er étage – Appartement N° 3–, Espace Erreda—Casablanca–Maroc, Maroc, Morocco
Victoria Technology Inc.; United States(a) |  | US$1.00 Ordinary shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
Waste Solutions and Recycling LLC; United States |  | US$ Units shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
West Kutai Foundation Limited; Singapore(c) |  | — |  | — |  | 100 |  | 10 Collyer Quay, #10-01 Ocean Financial Centre, 049315, Singapore
Wimmera Industrial Minerals Pty. Limited; Australia(a) |  | AUD Ordinary shares |  | 100 |  | 100 |  | Level 33, 120 Collins Street, Melbourne VIC 3000, Australia
Winchester South Development Company Proprietary Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 100 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Wyoming Coal Resources Company; United States |  | US$0.01 Common shares |  | 100 |  | 100 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
201 Logistics Center, LLC; United States(c) |  | — |  | — |  | 50 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, USA
AGM Holding Company Pte Ltd; Singapore |  | US$ Ordinary shares |  | 100 |  | 50.8 |  | 77 Robinson Road, #13-00, Robinson 77, 068896, Singapore
Other Group entities including subsidiaries where the effective ownership is less than 100%, associated undertakings and significant holdings in undertakings other than subsidiary companies
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
Alufluor AB; Sweden |  | SEK1,000.00 Ordinary shares |  | 50 |  | 50 |  | Industrigatan 70, Box 902, S-25109, Helsingborg, Sweden
Aluminerie Alouette Inc; Canada |  | CAD Ordinary shares |  | 40 |  | 40 |  | 400, Chemin de la Pointe-Noire, C.P. 1650, Sept-Îles Québec G4R 5M9, Canada
Aluminerie De Bécancour, Inc.; Canada |  | CAD1.00 Ordinary shares |  | 50.1 |  | 25.2 |  | 5555 Pierre Thibault Street, PO 30, Becancour, Quebec G0X 1B, Canada
Aluminium & Chemie Rotterdam B.V.; Netherlands |  | €4,555 Ordinary shares |  | 65.8 |  | 65.8 |  | Oude Maasweg 80, NL-3197 KJ, Botlek, Rotterdam, The Netherlands
Asia Gold Mongolia LLC; Mongolia |  | MNT1,250.00 Common shares |  | 100 |  | 50.7 |  | Suite 1302, F13, Monnis Tower, Chingis Avenue-15, 1st Khoroo, Sukhbaatar district, Ulaanbaatar, 14240, Mongolia
Asia Naran Bulag LLC; Mongolia |  | MNT1,000.00 Common shares |  | 100 |  | 50.7 |  | Suite 1302, F13, Monnis Tower, Chingis Avenue-15, 1st Khoroo, Sukhbaatar district, Ulaanbaatar, 14240, Mongolia
Balkhash Saryshagan LLP; Kazakhstan(c) |  | — |  | — |  | 75 |  | Dostyk 310/G, Almaty, 050020, Kazakhstan
Beasley River Marketing Pty Ltd; Australia |  | AUD A Class Shares |  | 100 |  | 53 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
| AUS B Shares |  | 100 |  |
Bektau B.V.; Netherlands |  | €200.00 Ordinary shares |  | 75 |  | 75 |  | Welplaatweg 104, 3197 KS , Botlek-Rotterdam, The Netherlands, Netherlands
Blair Athol Coal Pty. Ltd.; Australia |  | AUD Ordinary shares |  | 57.2 |  | 71.2 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Boyne Smelters Limited; Australia |  | AUD A1 Class shares |  | 100 |  | 59.4 |  | 123 Albert Street, Brisbane QLD 4000, Australia
| AUD A2 Class shares |  | 100 |  |
| AUD B1 Class shares |  | 100 |  |
CanPacific Potash Inc.; Canada(c) |  | — |  | — |  | 32 |  | c/o McKercher LLP, 374 Third Avenue South, Saskatoon SK S7K1M5, Canada
Carol Lake Company Ltd.; Canada |  | CAD$100.00 Ordinary shares |  | 100 |  | 58.7 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
Chinalco Rio Tinto Exploration Co. Ltd (in liquidation); China(d) |  | CNY1.00 Capital Contribution (Ordinary shares |  | 49 |  | 49 |  | Unit 402, China Resources Building, No. 8 Jianguomenbei Avenue, Dong Cheng District, Beijing, 100005 P.R., China
Chlor Alkali Unit Pte Ltd; Singapore |  | SGD$1.00 Ordinary (SGD) shares |  | 100 |  | 68.4 |  | 12 Marina Boulevard, #20-01 Marina Bay Financial Centre Tower 3, Singapore, 018982, Singapore
|  | US$1.00 Ordinary (USD) shares |  | 68.4 |  |
Corporation De Pêche Ste-Marguerite Inc.; Canada |  | CAD$10.00 Ordinary shares |  | 96.8 |  | 96.8 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
Dalrymple Bay Coal Terminal Pty Ltd; Australia |  | AUD Ordinary shares |  | 32.1 |  | 22.8 |  | Martin Armstrong Drive, Hay Point via Mackay QLD 4740, Australia
Dampier Salt Limited; Australia |  | AUD Ordinary ($1.00257)shares |  | 68.4 |  | 68.4 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
| AUD Ordinary ($1.88 on 31/01/2013) shares |  | 68.4 |  |
Enarotali Gold Project Limited; Jersey |  | £0.001 Ordinary shares |  | 25 |  | 25 |  | 13 Castle Street, St Helier, Jersey JE4 5UT, Jersey
Energy Resources of Australia Ltd; Australia |  | AUD A Class ordinary shares |  | 68.4 |  | 68.4 |  | C/- Mallesons Stephen Jacques, 60 Marcus Clarke Street, Canberra ACT, Australia
Fabrica De Plasticos Mycsa, S.A.; Bolivarian Republic of Venezuela(d) |  | VEF1.00 Common shares |  | 49 |  | 49 |  | Urbanización Industrial San Ignacio, parcela 2-A, vía San Pedro, Los Teques, Estado Miranda, Venezuela
Global Hubco BV; Netherlands |  | €1.00 Ordinary shares |  | 33.3 |  | 33.3 |  | c/o TMF Netherlands B.V., Luna Arena, Herikerbergweg 238, 1101, CM Amsterdam Zuidoost, Netherlands
Gulf Power Company/La Compagnie Gulf Power; Canada |  | CAD$100.00 Ordinary shares |  | 100 |  | 58.7 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
Hail Creek Marketing Pty Ltd; Australia |  | AUD Ordinary shares |  | 82 |  | 82 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Halco (Mining) Inc.; United States |  | US$100.00 Ordinary shares |  | 45 |  | 45 |  | The Prentice-Hall Corporation System, Inc., 2711 Centerville Road, Suite 400, Willmington DE 19808, United States
Half-Tide Marine Pty Ltd; Australia |  | AUD Ordinary shares |  | 48.6 |  | 34.6 |  | DBCT MS F283, Martin Armstrong Drive, Hay Point, QLD 4740, Australia
Heruga Exploration LLC; Mongolia |  | MNT 12,500 Common Shares |  | 100 |  | 50.8 |  | Suite 1302, F13, Monnis Tower, Chingis Avenue-15, 1st Khoroo, Sukhbaatar district, Ulaanbaatar, 14240, Mongolia
Hope Downs Marketing Company Pty Ltd; Australia |  | AUD A Class shares |  | 100 |  | 50 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Hydrogen Energy International LLC; United States(c) |  | — |  | — |  | 50 |  | 1209 Orange Street, Wilmington, New Castle, Delaware, U.S.A.
IAL Holdings Singapore Pte Ltd; Singapore |  | US$ Ordinary shares |  | 100 |  | 57.8 |  | 77 Robinson Road, #13-00, Robinson 77, 068896, Singapore
Iron Ore Company of Canada; United States |  | US$1,000.00 Series B shares |  | 91.4 |  | 58.7 |  | 1209 Orange Street, Wilmington, Delaware 19801, U.S.A.
| US$1,000.00 Series G shares |  | 100 |
| US$1,000.00 Series F shares |  | 100 |  |
Notes to the 2017 financial statements continued 46 Related undertakings continued
Other Group entities including subsidiaries where the effective ownership is less than 100%, associated undertakings and significant holdings in undertakings other than subsidiary companies
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
Korgantas LLP; Kazakhstan(c) |  | — |  | — |  | 75 |  | Dostyk 310/G, Almaty, 050020, Kazakhstan
Lao Sanxai Minerals Company Limited; Lao People’s Democratic Republic |  | US$1.00 Ordinary shares |  | 70 |  | 70 |  | 5th Floor, ANZ Bank Building, 33 Lane Xang Avenue, Hatsady Village, Chanthaboury District, Vientiane Capital, Lao People’s Democratic Republic
Leichhardt Coal Pty Limited; Australia |  | AUD Ordinary shares |  | 44.7 |  | 44.7 |  | 123 Albert Street, Brisbane QLD 4000, Australia
Magma Arizona Railroad Company; United States |  | US$100.00 Common shares |  | 99.9 |  | 54.9 |  | CSC, 2338 W. Royal Palm Road, Suite J, Phoenix AZ 85021
Minera Escondida Ltda; Chile(c) |  | — |  | — |  | 30 |  | Av.Cerro Plomo, Piso 18,Las Condes, Santiago, 7580154, Chile
Movele; Luxembourg |  | US$ Ordinary shares |  | 100 |  | 50.8 |  | 22 rue Jean-Pierre Brasseur, L-1258, Luxembourg
| US$ Preference shares |  | 100 |  |
New Zealand Aluminium Smelters Ltd; New Zealand |  | NZD1.00 Class A Ordinary shares |  | 79.4 |  | 79.4 |  | Tiwai Road , Southland via Intercargill, New Zealand
Northern Land Company Ltd; Canada |  | CAD1.00 Ordinary shares |  | 50 |  | 58.7 |  | 235 Water Street, Ste 1000 Scotia Ctr, St-John’s Newfoundland A1C 1B6
Nozalela Mineral Sands (Pty) Ltd; South Africa |  | ZAR 1.00 Ordinary shares |  | 100 |  | 74 |  | The Farm RBM, Number 16317, KwaZulu-Natal, South Africa
NZAS Retirement Fund Trustee Limited; New Zealand |  | NZD Ordinary shares |  | 100 |  | 79.4 |  | Mercer (NZ) Limiited, Level 8, 113-119 The Terrace, Wellington, 6140, New Zealand
Orian Holding Corp; British Virgin Islands(e) |  | US$ Common shares |  | 100 |  | 50.8 |  | Midocean Cambers-Management and Trust Services (BVI) Limited, PO Box 805, Pelican Drive, Road Town, Tortola,VG 110, British Virgin Islands
Oyu Tolgoi LLC; Mongolia(f) |  | MNT10,000.00 Common shares |  | 66 |  | 33.5 |  | Level 12 Monnis Tower, Chinggis Avenue-15, 1st khoroo, Sukhbaatar District, Ulaanbaatar, 14240, Mongolia
Oyu Tolgoi Netherlands BV; Netherlands |  | €100.00 Ordinary shares |  | 100 |  | 50.8 |  | Prins Bernhardplein 200 , Amsterdam, 1097 JB, The Netherlands
Pechiney Philippines Inc.; Philippines |  | PHP10.00 Ordinary shares |  | 99.9 |  | 99.9 |  | Room 306, ITC Building, 337 Sen Gil Puyat Avenue, Markati, Metro Manila, Philippines
Pechiney Reynolds Quebec, Inc.; United States |  | US$10.00 Common shares |  | 50 |  | 50.2 |  | CSC, 233 South 13th Street, Suite 1900, Lincoln NE 68508, U.S.A.
| US$100.00 Preferred shares |  | 100 |  |
Procivis Savoie; France |  | €19.00 Ordinary shares |  | 22.1 |  | 22.1 |  | 116 Quai Charles Roissard, 73000, Chambéry, France
PT Hutan Lindung Kelian Lestari; Indonesia |  | IDR9,803.00 Ordinary shares |  | 99 |  | 99 |  | Kelian Mine Site, West Kutai, East Kalimantan, Indonesia
PT Kelian Equatorial Mining; Indonesia |  | IDR1,080.00 Ordinary shares |  | 90 |  | 90 |  | 31st Floor, Menara BTPN, Jl. Dr. Ide Anak Agung Gde Agung Lot 5.5-5.6, Mega Kuningan, Jakarta, 12950, Indonesia
PT Mitra Sumbawa Minerals; Indonesia |  | US$1.00 Ordinary shares |  | 90 |  | 90 |  | 15th Floor, Menara Anugrah, Kantor Taman E3.3, Jalan DR. Ide Anak Agung Gde Agung Lot 8.6-8.7, Jakarta, 12950, Indonesia
PT Rikit Alas Minerals; Indonesia |  | US$1.00 Ordinary shares |  | 90 |  | 90 |  | 15th Floor, Menara Anugrah, Kantor Taman E3.3, Jalan DR. Ide Anak Agung Gde Agung Lot 8.6-8.7, Jakarta, 12950, Indonesia
QIT Madagascar Minerals SA; Madagascar |  | US$10.00 Certicats d’investissemant |  | 100 |  | 80 |  | Immeuble ASSIST, Ivandry , Lot N°35, 5ème étage, 101 Antananarivo , Antananarivo, Madagascar
| US$10.00 Common shares |  | 80 |  |
Quebec North Shore and Labrador Railway Company/ Compagnie de Chemin de Fer du Littoral Nord de Quebec et du Labrador Inc.; Canada |  | CAD$27.59 Ordinary shares |  | 100 |  | 58.7 |  | 400-1190 Avenue des Canadiens-de-Montréal, Montréal Québec H3B 0E3, Canada
Queensland Alumina Limited; Australia |  | AUD Class B shares |  | 100 |  | 80 |  | Plant Operations Building, Parsons Point, Gladstone QLD 4680, Australia
|  | AUD Class C shares |  | 100 |  |
| AUD CLASS D shares |  | 100 |  |
Resolution Copper Mining LLC; United States(c) |  | — |  | — |  | 55 |  | CSC, 251 Little Falls Drive, Wilmington DE 19808, U.S.A.
Richards Bay Mining (Proprietary) Limited; South Africa |  | ZAR0.01 B Ordinary shares |  | 99.9 |  | 73.9 |  | The Farm RBM, Number 16317, KwaZulu-Natal, South Africa
|  | ZAR0.01 B Preference shares |  | 100 |  |
|  | ZAR 0.01 BHP Billiton Preference share |  | 100 |  |
Richards Bay Prefco (Pty) Ltd; South Africa |  | ZAR0.01 Preference shares |  | 100 |  | 99.9 |  | The Farm RBM, Number 16317, KwaZulu-Natal, South Africa
Richards Bay Titanium (Proprietary) Limited; South Africa |  | ZAR0.01 B Preference shares |  | 100 |  | 73.9 |  | The Farm RBM, Number 16317, KwaZulu-Natal, South Africa
| ZAR0.01 BHP Billiton Preference shares |  | 100 |
| ZAR0.01 B Ordinary shares |  | 100 |
Rightship Pty Ltd; Australia |  | AUD Ordinary shares |  | 33.3 |  | 33.3 |  | Level 20, 500 Collins Street, Melbourne VIC 3000, Australia
Rio Tinto Orissa Mining Private Ltd; India |  | INR100.00 Ordinary shares |  | 51 |  | 51 |  | N-3 / 356, IRC Village, Nayapalli, Bhubaneswar, Orissa, 751015, India
Rio Tinto Sohar Logistics LLC; Oman |  | OMR1.00 Ordinary shares |  | 70 |  | 70 |  | P.O. Box 686, Ruwi, 112, Oman
Riversdale Anthracite Colliery (Proprietary) Ltd; South Africa |  | ZAR2.00 Ordinary shares |  | 74 |  | 74 |  | Ground Floor – Cypress Place North, Woodmead Business Park, 140-142 Western Service Road, Woodmead, 2151, South Africa
Robe River Mining Co. Pty. Ltd.; Australia |  | AUD Class A shares |  | 40 |  | 73.6 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
| AUD Class B shares |  | 76.4 |  |
Robe River Ore Sales Pty. Ltd.; Australia |  | AUD Ordinary |  | 65 |  | 57.1 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Rössing Uranium Limited; Namibia(f) |  | NAD1 “B” Shares shares |  | 71.2 |  | 35.6 |  | 360 Sam Nujoma Drive, Klein Windhoek, Windhoek, Namibia
| NAD0.1 “C” Shares |  | 70.6 |  |
Saryarka B.V.; Netherlands |  | €200.00 Ordinary shares |  | 75 |  | 75 |  | Welplaatweg 104, 3197 KS , Botlek-Rotterdam, The Netherlands, Netherlands
SGLS LLC; Mongolia |  | MNT10,000 Common shares |  | 100 |  | 50.8 |  | Suite 1302, F13, Monnis Tower, Chingis Avenue-15, 1st Khoroo, Sukhbaatar district, Ulaanbaatar, 14240, Mongolia
Simfer Jersey Finance 1 Ltd; Jersey |  | US$ Ordinary shares |  | 100 |  | 53 |  | 22 Grenville Street, St Helier, JE4 8PX, Jersey
Simfer Jersey Finance 2 Ltd; Jersey |  | US$ Ordinary shares |  | 53 |  | 53 |  | 22 Grenville Street, St Helier, JE4 8PX, Jersey
Simfer Jersey Limited; Jersey |  | US$ Ordinary shares |  | 53 |  | 53 |  | 22 Grenville Street, St Helier, JE4 8PX, Jersey
Simfer Jersey Nominee Limited; United Kingdom |  | £1.00 Ordinary shares |  | 100 |  | 53 |  | 6 St James’s Square, London, SW1Y 4AD, United Kingdom
SIMFER S.A.; Guinea(f) |  | GNF100,000 Ordinary shares |  | 85 |  | 45 |  | Résidence Dolphine1 – Coleah Corniche Sud, Commune de Matam, BP 848, Conakry, BP 848, Guinea
Singapore Metals Pte. Ltd.; Singapore |  | US$ Ordinary shares |  | 100 |  | 50.8 |  | 77 Robinson Road, #13-00, Robinson 77, 068896, Singapore
Société Minière Et De Participations Guinée-Alusuisse; Guinea(c) |  | — |  | — |  | 50 |  | Tougue, Guinea
Sohar Aluminium Co. L.L.C.; Oman |  | OMR1.00 Ordinary shares |  | 20 |  | 20 |  | Sohar Industrial Estate, P.O. Box 80, PC 327, Sohar, Sultanate of Oman
THR Aruba Holdings LLC A.V.V.; Aruba |  | US$1.00 Common shares |  | 100 |  | 50.8 |  | IMC International Management Trust Company N.V.,L.G.Smith Blvd. 62, Miramar Building, Oranjestad, Aruba
THR Delaware Holdings, LLC; United States(c) |  | — |  | — |  | 50.8 |  | National Corporate Research, Ltd., 850 New Burton Road, Suite 201, Dover DE 19904, United States
THR Kharmagtai Pte Ltd.; Singapore |  | US$ Ordinary shares |  | 100 |  | 50.8 |  | 77 Robinson Road, #13-00, Robinson 77, 068896, Singapore
THR MINES (BC) LTD.; Canada |  | CAD Common shares |  | 100 |  | 50.8 |  | 354-200 Granville Street, Vancouver BC V6C 1S4, Canada
|  | US$ Common shares |  | 100 |  |
Notes to the 2017 financial statements continued 46 Related undertakings continued
Other Group entities including subsidiaries where the effective ownership is less than 100%, associated undertakings and significant holdings in undertakings other than subsidiary companies
Name of undertaking and country of incorporation |  | Share class |  | % of share class held by Group companies |  | Effective Group % ownership |  | Registered office address
THR Mines Services Co. Ltd.; Canada |  | CAD Common shares |  | 100 |  | 50.8 |  | Lackowicz Shier & Hoffman Barristers & Solicitors, 300-204 Black Street, Whitehorse YT Y1A 2M9, Canada
THR OYU TOLGOI LTD.; British Virgin Islands |  | US$1.00 Ordinary shares |  | 100 |  | 50.8 |  | Midocean Chambers, Road Town, Tortola, Virgin Islands, British
THR Ulaan Pte. Ltd.; Singapore |  | US$ Ordinary shares |  | 100 |  | 50.8 |  | 77 Robinson Road, #13-00, Robinson 77, 068896, Singapore
Tisand (Proprietary) Limited; South Africa |  | ZAR1.00 A Ordinary shares |  | 100 |  | 74 |  | The Farm RBM, Number 16317, KwaZulu-Natal, South Africa
| ZAR1.00 B Ordinary shares |  | 100 |  |
| ZAR1,000.00 Cumulative preference shares |  | 100 |  |
Tomago Aluminium Company Pty Limited; Australia |  | AUD Ordinary shares |  | 100 |  | 51.6 |  | 638 Tomago Road, Tomago, NSW 2322, Australia
Turquoise Hill (Beijing) Services Company Ltd; China(c) |  | — |  | — |  | 50.8 |  | Room 2913, Cameo Center, No.16 GuangShun South Street, WangJing ChaoYang District, Beijing China. 100102
Turquoise Hill Netherlands Cooperatief U.A.; Netherlands |  | US$ COOP shares |  | 100 |  | 50.8 |  | Prins Bernhardplein 200, 1097 JB Amsterdam, The Netherlands
Turquoise Hill Resources Ltd.; Canada |  | CAD Common shares |  | 50.8 |  | 50.8 |  | 300-204 Black Street, Whitehorse Yukon Territories Y1A 2M9, Canada
Turquoise Hill Resources Philippines Inc.; Philippines(d) |  | PHP100.00 Common shares |  | 99.9 |  | 50.8 |  | Romulo Mabanta Buenaventura Sayoc & De Los Angeles, 21st Floor, Philamlife Tower, 8767 Paswode Roxas, Makati City, 1226, Philippines
Turquoise Hill Resources Singapore Pte Ltd.; Singapore |  | SGD1.00 Common shares |  | 100 |  | 50.8 |  | 1A International Business Park, 609933, Singapore
Twin Falls Power Corporation Ltd; Canada |  | CAD Class B shares |  | 74.4 |  | 34.253 |  | Hydro Place, P.O. Box 12500, St-John’s Newfoundand and Labrador A1B 3T5, Canada
Yalleen Pastoral Co Pty Ltd; Australia |  | AUD Ordinary shares |  | 63.7 |  | 56 |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia
Zululand Titanium (Pty) Ltd; South Africa |  | ZAR1.00 Ordinary shares |  | 100 |  | 74 |  | The Farm RBM, Number 16317, KwaZulu-Natal, South Africa
In addition, the Group participates in the following unincorporated arrangements:
Name of undertaking and country of incorporation |  | Address or principal place of business |  | Interest % owned by the Group
Bao-HI Ranges Joint Venture; Australia |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia |  | 54
Blair Athol Joint Venture; Australia |  | 123 Albert Street, Brisbane QLD 4000, Australia |  | 71.2
Cape Bougainville Joint Venture; Australia |  | 123 Albert Street, Brisbane QLD 4000, Australia |  | 53.8
Channar Mining Joint Venture; Australia |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia |  | 60
Diavik Joint Venture; Canada |  | 300-5201 50th Avenue, Yellowknife NT X1A 2P9, Canada |  | 60
Gladstone Power Station Joint Venture; Australia |  | NRG Gladstone Operating Service, Gladstone Power Station, Gladstone QLD 4680, Australia |  | 42.1
Grasberg joint operation; Indonesia |  | JI Mandala Raya Selatan, No. 1 Kuala Kencana, Timika, Irian Jaya, 98663, Indonesia |  | 40
Green Mountain Mining Venture; United States |  | 4700 Daybreak Parkway, South Jordan UT 84009, United States |  | 100
Hail Creek Joint Venture; Australia |  | 123 Albert Street, Brisbane QLD 4000, Australia |  | 82
Hope Downs Joint Venture; Australia |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia |  | 50
Kestrel Joint Venture; Australia |  | 123 Albert Street, Brisbane QLD 4000, Australia |  | 80
Mitchell Plateau Joint Venture; Australia |  | 123 Albert Street, Brisbane QLD 4000, Australia |  | 52.3
Rhodes Ridge Joint Venture; Australia |  | Level 18 Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia |  | 50
Robe River Iron Associates Joint Venture; Australia |  | Level 27,Central Park, 152-158 St. Georges Terrace, Perth WA 6000, Australia |  | 57.1
Tomago Aluminium Joint Venture; Australia |  | 638 Tomago Road, NSW 2322, Tomago, Australia |  | 51.6
Winchester South Joint Venture; Australia |  | 123 Albert Street, Brisbane QLD 4000, Australia |  | 75
Winter Road Joint Venture; Canada |  | 300-5201 50th Avenue, Yellowknife NT X1A 2P9, Canada |  | 33.3
(a) | Directly held by Rio Tinto Limited.
(b) | Directly held by Rio Tinto plc.
(c) | Group ownership is held through an interest in capital. The entity has no classes of shares.
(d) | In liquidation or application for dissolution filed.
(e) | Dissolved after 31 December 2017.
(f) | Classed as a subsidiary in accordance with section 1162(4)(a) of the Companies Act 2006 on the grounds of dominant influence.
(g) | This company changed its name to Rio Tinto PACE Australia Pty Limited with effect from 12 January 2018.
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