Rio Tinto Technological Resources UK Limited

Active08270236 Private limited company

Incorporated: 26 October 2012 (14 years)
Previously known as: Rio Tinto Technology Resources UK Limited (until 29 October 2012)
This list may be incomplete. See all names on Companies House
Industry: Other information technology service activities (62090)
Directors: Michael Stuart Pasmore
Richard Alan Avery
Owned by: Rio Tinto International Holdings Limited
Accounts type: Audit exemption subsidiary
Region: Greater London
Address: 6 St James's Square
London
SW1Y 4AD

Filing status

Accounts due: 30 September 2027
Last accounts: 31 December 2025
Conf. stmt due: 30 September 2027
Last conf. stmt: 16 September 2026

Officers 3 active

Officer details are public data from the Companies House register.

Pasmore, Michael Stuart

Director · Appointed 25 March 2024

Also at THR Copper Limited, Rio Tinto Western Holdings Limited, Rio Tinto Copper Limited · more companies

British

Born April 1981 (45)

Rio Tinto Secretariat Limited

Corporate Secretary · Appointed 5 May 2017

Also at THR Copper Limited, Rio Tinto Western Holdings Limited, Lawson Mardon Smith Brothers Ltd. · more companies

Avery, Richard Alan

Director · Appointed 17 April 2015

Also at Rio Tinto Copper Limited, Rio Tinto Nominees Limited, Rio Tinto Metals Limited · more companies

British

Born June 1975 (51)

Officer history (11 former)

25 March 2024

Appointed Pasmore, Michael Stuart as Director

25 March 2024

Resigned Hodges, Andrew William as Director

3 September 2021

Appointed Hodges, Andrew William as Director

3 September 2021

Resigned Kuang, Ji as Director

28 February 2019

Resigned Atkinson, Robert Douglas as Director

14 December 2018

Resigned Diallo, Thierno as Director

14 December 2018

Appointed Kuang, Ji as Director

31 January 2018

Resigned Harris, Michael Oates, Dr as Director

31 January 2018

Appointed Diallo, Thierno as Director

31 January 2018

Appointed Atkinson, Robert Douglas as Director

5 May 2017

Appointed Rio Tinto Secretariat Limited as Corporate Secretary

5 May 2017

Resigned Day, Helen Christine as Secretary

6 February 2017

Resigned Harris, Edward James John as Director

30 November 2016

Resigned Moss, Allan Samuel Ernest as Director

10 July 2015

Appointed Harris, Edward James John as Director

17 April 2015

Resigned Witthoft, Delwin Gunther as Director

17 April 2015

Appointed Avery, Richard Alan as Director

12 December 2014

Appointed Day, Helen Christine as Secretary

12 December 2014

Resigned Aldridge, Gemma Jane Constance as Secretary

17 May 2014

Appointed Witthoft, Delwin Gunther as Director

1 October 2013

Resigned Marshall, Keith as Director

30 November 2012

Appointed Harris, Michael Oates, Dr as Director

26 October 2012

Appointed Marshall, Keith as Director

26 October 2012

Appointed Aldridge, Gemma Jane Constance as Secretary

26 October 2012

Appointed Moss, Allan Samuel Ernest as Director

Ownership 1 active

People and entities with significant control, from the Companies House PSC register

Rio Tinto International Holdings Limited

Corporate entity · Notified 6 April 2016

Owns 75–100% of shares

Holds 75–100% of voting rights

Right to appoint and remove directors

Limited By Shares

Reg. no. 425864

Group structure 39 shown

Ownership group derived from the Companies House PSC register

Rio Tinto PLC

Rio Tinto European Holdings Limited Owns 75–100% of shares

Rio Tinto Canada Finance Limited Owns 75–100% of shares

Rio Tinto London Limited Owns 75–100% of shares

Rio Tinto Medical Plan Trustees Limited Owns 75–100% of shares

Rio Tinto Nominees Limited Owns 75–100% of shares

Rio Tinto Secretariat Limited Owns 75–100% of shares

Rio Tinto Metals Limited Owns 75–100% of shares

Rio Tinto Mining and Exploration Limited Owns 75–100% of shares

Thos W Ward Limited Owns 75–100% of shares

Rio Tinto Minerals Development Limited Owns 75–100% of shares

Rio Tinto Western Holdings Limited Owns 75–100% of shares

LA Granja UK Holdings Limited Owns 25–50% of shares

Nuton Holdings Limited Owns 75–100% of shares

Rio Tinto BM Limited Owns 75–100% of shares

Rio Tinto Minerals Limited Owns 75–100% of shares

Rio Tinto International Holdings Limited Owns 75–100% of shares

Anglesey Aluminium Metal Limited Owns 75–100% of shares

Borax Europe Limited Owns 75–100% of shares

British Alcan Aluminium Limited Owns 75–100% of shares

Alcan Chemicals Limited Owns 75–100% of shares

Alcan Farms Limited Owns 75–100% of shares

Tbac Limited Owns 75–100% of shares

Iea Environmental Projects Limited Owns 75–100% of shares

Iea Coal Research Limited In liquidationOwns 75–100% of shares

Ioc Sales Limited Owns 75–100% of shares

Lawson Mardon Flexible Limited Owns 75–100% of shares

Lawson Mardon Smith Brothers Ltd. Owns 75–100% of shares

Pechiney Aviatube Limited Owns 75–100% of shares

Rio Tinto Bahia Holdings Limited Owns 75–100% of shares

Rio Tinto Bauxite Atlantic Limited Owns 75–100% of shares

Rio Tinto Copper Holdings Limited Owns 75–100% of shares

Rio Tinto Copper Limited Owns 75–100% of shares

Rio Tinto Energy Limited Owns 75–100% of shares

Rio Tinto Finance (Usa) PLC Owns 75–100% of shares

Rio Tinto Finance PLC Owns 75–100% of shares

Rio Tinto Indonesian Holdings Limited Owns 75–100% of shares

Rio Tinto Technological Resources UK Limited This company Owns 75–100% of shares

And 10 more

THR Copper Limited Owns 75–100% of shares

Filings

Recent filings only. See the full history on Companies House

Date	Description	Made Up To
13 April 2026	Other filing
13 April 2026	Other filing
13 April 2026	Accounts filing
18 September 2025	Confirmation statement with no updates	16 September 2025
26 August 2025	Audit exemption subsidiary accounts	31 December 2024