Company: RTNTF
Filing Date: 2025-02-20
Form Type: 20-F
Source: 0001628280-25-006642
Chunk: 429

Company: RIO TINTO LTD
Filing Date: 2025-02-20
Form: 20-F
Chunk 429
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 has a 22.95% shareholding in the Sangaredi mine, but benefits from 45% of production. 7. Borate quantities are expressed as B 2 O 3 . 8. On 16 December 2022, Rio Tinto completed the acquisition of 100% of Turquoise Hill Resources Ltd, increasing our ownership interest in Oyu Tolgoi from 33.52% to 66%. Production is reported including this change from 1 January 2023. 9. Includes 100% of production from Paraburdoo, Mount Tom Price, Western Turner Syncline, Marandoo, Yandicoogina, Brockman, Nammuldi, Silvergrass, Channar, Gudai-Darri and the Eastern Range mines. While we own 54% of the Eastern Range mine, under the terms of the joint venture agreement, Hamersley Iron manages the operation and is obliged to purchase all mine production from the joint venture and, therefore, all of the production is included in Rio Tinto’s share of production. 10. Quantities comprise 100% of Rio Tinto Iron and Titanium Quebec Operations and our 74% share of Richards Bay Minerals’ production. Ilmenite mined in Madagascar is processed in Canada.

| Annual Report on Form 20-F 2024 | 277 | riotinto.com |

Production, Mineral Reserves, Mineral Resources and operations Mineral Resources and Mineral Reserves Mineral Resources and Mineral Reserves for Rio Tinto managed operations are reported in accordance with the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves, December 2012 (the JORC Code) as required by the Australian Securities Exchange (ASX). Rio Tinto also files this Form 20-F with the SEC and prepares the Form 20-F Mineral Resources and Mineral Reserves in accordance with subpart 1300 of Regulation S-K (SK-1300). Some variations may occur between the reporting in accordance with the JORC Code and SK-1300. A Mineral Resource is a concentration or occurrence of solid material of economic interest in or on the Earth’s crust in such form, grade (or quality), and quantity that there are reasonable prospects for eventual economic extraction. Estimates of such material are based largely on geological information with only preliminary consideration of mining, economic and other factors. While in the judgement of the Qualified Persons (Competent Persons as defined by the JORC Code) there are realistic expectations that