Company: RTNTF
Filing Date: 2025-03-10
Form Type: 424B2
Source: 0001104659-25-022024
Chunk: 0

Company: RIO TINTO LTD
Filing Date: 2025-03-10
Form: 424B2
Chunk 0
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TABLE OF CONTENTS

**The information in this preliminary prospectus supplement and the accompanying Base Prospectus is not complete and may be changed. This preliminary prospectus supplement and the accompanying base prospectus are not an offer to sell these securities and are not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.**

#### Filed Pursuant to Rule 424(b)(2)​

#### Registration No. 333-271670​

#### SUBJECT TO COMPLETION, DATED MARCH 10, 2025

### PROSPECTUS SUPPLEMENT
**(To Base Prospectus dated May 5, 2023)**

#### Rio Tinto Finance (USA) plc

#### U.S.$ % Notes due 20

#### U.S.$ % Notes due 20

#### U.S.$ % Notes due 20

#### U.S.$ % Notes due 20

#### U.S.$ % Notes due 20

#### U.S.$ % Notes due 20

#### U.S.$ % Notes due 20

#### U.S.$ Floating Rate Notes due 20

#### Fully and unconditionally guaranteed by

#### Rio Tinto plc

#### and

#### Rio Tinto Limited
The securities offered by this prospectus supplement comprise the U.S.$ % notes due 20 (the “20 Notes”), U.S.$ % notes due 20 (the “20 Notes”), U.S.$ % notes due 20 (the “20 Notes”), U.S.$ % notes due 20 (the “20 Notes”), U.S.$ % notes due 20 (the “20 Notes”), U.S.$ % notes due 20 (the “20 Notes”), U.S.$ % notes due 20 (the “20 Notes”) and the U.S.$ floating rate notes due 20 (the “Floating Rate Notes”, and together with the 20 Notes, the 20 Notes, the 20 Notes, the 20 Notes, the 20 Notes, the 20 Notes and the 20 Notes, the “Notes” and each a “Note”).

Interest will be payable with respect to the 20 Notes, semi-annually on and of each year, beginning on , 2025. The 20 Notes will mature at 100% of their principal amount on , 20 subject to the applicable business day convention. Interest will be payable with respect to the 20 Notes, semi-annually on and of each year, beginning on , 2025. The 20 Notes