Company: RTNTF
Filing Date: 2025-02-20
Form Type: 20-F
Source: 0001628280-25-006642
Chunk: 533

Company: RIO TINTO LTD
Filing Date: 2025-02-20
Form: 20-F
Chunk 533
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, including labour costs. – Ability to continue sourcing water. – Changes to mining, hydrological, geotechnical parameters, and assumptions. – Ability to maintain environmental and social licence to operate. – Metallurgical recovery assumptions. For more information regarding the material assumptions for the Mineral Reserves estimates at Oyu Tolgoi, see Section 12 of Oyu Tolgoi Technical Report Summary filed herewith as exhibit 96.3 to the 2022 Form 20-F . Exploration Exploration on the mine leases is undertaken by Oyu Tolgoi LLC’s site technical services team. The current exploration strategy is focused on developing a project pipeline prioritised in areas that can impact the current development of the Oyu Tolgoi deposits, seeking low-cost development options and continuing the assessment of legacy datasets to enable future discovery. Exploration targets, based on identified medium or high priority, have had exploration work completed in 2024, and will continue to be investigated going forward based on priority and potential. Development of the known Mineral Resources is a key objective of stakeholders and over the life of Oyu Tolgoi. Oyu Tolgoi LLC will continue to progress its orebody knowledge of these known resources to improve decision making on their potential development. Additional information can be found in Section 7 of the Oyu Tolgoi Technical Report Summary filed as exhibit 96.3 to the 2022 Form 20-F .

| Annual Report on Form 20-F 2024 | 353 | riotinto.com |

Additional information | US Disclosure Simandou Property Overview The SimFer Iron Ore Project (Simandou) is an iron ore mining project located in the Republic of Guinea, approximately 550km southeast of Conakry (Guinea’s capital), towards the southern end of the 110km long Simandou Range. The Simandou orebodies are located within the 369km² area (Blocks 3 and 4) of the Simandou South Mining Concession (the Concession) which is held by SimFer S.A. (SimFer). Simandou is located at latitude 08°31′N, longitude 08°54′W. Iron ore extracted from Blocks 3 and 4 (and the neighbouring Winning Consortium Simandou (WCS) mining concession Blocks 1 and 2) will be exported via rail and port infrastructure being co- developed between the Guinean State, SimFer Jersey, and WCS, with the ultimate owner and operator of