Company: RTNTF
Filing Date: 2025-02-20
Form Type: 20-F
Source: 0001628280-25-006642
Chunk: 432

Company: RIO TINTO LTD
Filing Date: 2025-02-20
Form: 20-F
Chunk 432
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    48.9 |    4.7 |              22.0 |                               46 |       |                                           10 |    48.9 |    4.9 |
| 78                                           |    47.1 |    1.9 |              23.0 |                               78 |       |                                           80 |    47.1 |    1.9 |
| 1,207                                        |    53.4 |    8.2 |                   |                            1,207 |       |                                        1,170 |    53.3 |    8.3 |

Rio Tinto Aluminium The change in Mineral Reserves classification at Amrun reflects a higher level of confidence in the modifying factors resulting from completion of an access study and increased confidence in the underlying Mineral Resources as a result of updated orebody knowledge. A JORC Table 1 in support of this change will be released to the market contemporaneously with the release of the Annual Report and can be viewed at riotinto.com/resourcesandreserves . The decrease in Mineral Reserves tonnes at both Andoom and Gove, is due to mining depletion. Mining operations ceased at East Weipa in 2024. Porto Trombetas (MRN) Mineral Reserves tonnes increased due to the conversion of Mineral Resources to Mineral Reserves at the West Zone Project, following the approval of the Preliminary Environmental Licence. A JORC Table 1 in support of this change will be released to the market contemporaneously with the release of the Annual Report and can be viewed at riotinto.com/resourcesandreserves .

| Annual Report on Form 20-F 2024 | 280 | riotinto.com |

Production, Mineral Reserves, Mineral Resources and operations | Mineral Reserves

|                                      | Type ofmine1 | Proven Mineral Reservesas at 31 December 2024 |        |         |     |         |       | Probable Mineral Reservesas at 31 December 2024 |        |         |     |       |      |
| Tonnage                              | Grade        |                                               |        |         |     | Tonnage | Grade |                                                 |        |         |     |       |      |
| Iron ore2 3                          | Mt           |                                          % Fe | % SiO2 | % Al2O3 | % P |   % LOI |    Mt |                                            % Fe | % SiO2 | % Al2O3 | % P