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Related undertakings

12 Months Ended

Dec. 31, 2017

Disclosure Of Interests In Other Entities Explanatory [Abstract]

Related undertakings

Strategic report Governance report Financial statements Production, reserves
and operations Additional information

46 Related undertakings

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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