Company: RTNTF
Filing Date: 2025-02-20
Form Type: 20-F
Source: 0001628280-25-006642
Chunk: 401

Company: RIO TINTO LTD
Filing Date: 2025-02-20
Form: 20-F
Chunk 401
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, effective from 1 January

2024, implemented a 1% royalty on revenues, a margin based tax with rates ranging between 8% and 26%, and a 46.5% cap to the overall Chilean tax burden of mining companies.

Principal associates The Group’s principal associates at 31 December 2024 are summarised in the table below.

| Company and country of incorporation/operation  |                                                        Principal activities | Groupinterest(%) |
| Australia                                       |                                                                             |                  |
| Boyne Smelters Limited(a)                       |                                                          Aluminium smelting |             73.5 |
| Brazil                                          |                                                                             |                  |
| Mineração Rio do Norte S.A.                     |                                                              Bauxite mining |               22 |
| Singapore/Guinea                                |                                                                             |                  |
| Winning Consortium Simandou Railway Pte. Ltd(b) | Rail and port infrastructure including trans-Guinean heavy haul rail system |            18.02 |
| Winning Consortium Simandou Ports Pte. Ltd(b)   |                                                                       18.02 |                  |
| United States                                   |                                                                             |                  |
| Halco (Mining) Inc.(c)                          |                                                              Bauxite mining |               45 |

(a) The parties that collectively control Boyne Smelters Limited (BSL) do so through decisions that are determined on an aggregate voting interest that can be achieved by several combinations

of the parties. Although each combination requires Rio Tinto’s approval, this is not joint control as defined under IFRS 11 “Joint Arrangements”. Rio Tinto is therefore determined to have

significant influence over this company. During the period, we acquired an additional 14.11% interest (comprising 11.65% from Mitsubishi Corporation and 2.46% from Sumitomo Chemical

Company) in BSL, increasing our total interest to 73.5% . BSL remains accounted for as an investment in associate under the equity method.

(b) Rio Tinto SimFer UK Limited (which is wholly owned by the Group) holds a 53% interest in SimFer Jersey Limited (SimFer Jersey), a company incorporated in Jersey. During the year, SimFer

Jersey, through its wholly owned subsidiary, SimFer InfraCo Ltd., a company incorporated in the United Kingdom, acquired 34% interests in Winning Consortium Simandou Railway Pte. Ltd and

Winning Consortium Simandou Ports Pte. Ltd (