Company: RTNTF
Filing Date: 2025-03-13
Form Type: 424B5
Source: 0001104659-25-023282
Chunk: 2

Company: RIO TINTO LTD
Filing Date: 2025-03-13
Form: 424B5
Chunk 2
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 quarterly on March 14, June 14, September 14 and December 14 of each year, beginning on June 14, 2025. The Floating Rate Notes will mature at 100% of their principal amount on March 14, 2028 subject to the applicable business day convention.

The Notes and the guarantees will be senior unsecured obligations and will rank equally with all other present and future unsecured and unsubordinated indebtedness.

The fixed rate notes will be redeemable at our option or at the option of Rio Tinto plc or Rio Tinto Limited, in whole or in part, at any time at the redemption price determined in the manner described in this prospectus supplement. We may also redeem the Notes at the principal amount of the Notes being redeemed plus accrued interest to the date of redemption upon the occurrence of certain tax events described in this prospectus supplement.

Application will be made to list the Notes on the New York Stock Exchange.

TABLE OF CONTENTS

Investing in the Notes involves risks. See “Risk Factors” beginning on page S-14of this prospectus supplement and “Item 3D Risk factors” beginning on page 91 of our Annual Report on Form 20-F for the year ended December 31, 2024, which are incorporated by reference in this prospectus supplement and the accompanying prospectus, to read about factors you should consider before investing in the Notes. Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus supplement or the accompanying base prospectus. Any representation to the contrary is a criminal offense.

| ​                                 | ​ | ​ | Price toPublic(1)     | ​ | ​ | UnderwritingDiscounts | ​ | ​ | Proceeds, BeforeExpenses(2) | ​ |
| Per 2027 Note                     | ​ | ​ | 99.864%               | ​ | ​ | 0.100%                | ​ | ​ | 99.764%                     | ​ |
| Total for the 2027 Notes          | ​ | ​ | U.S.$499,320,000.00   | ​ | ​ | U.S.$500,000.00       | ​ | ​ | U.S.$498,820,000.00         | ​ |
| Per 2028 Note                     | ​ | ​ | 99.731%               | ​ | ​ | 0.125%                | ​ | ​ | 99