Company: RTNTF
Filing Date: 2025-03-14
Form Type: 6-K
Source: 0001104659-25-023811
Chunk: 0

Company: RIO TINTO LTD
Filing Date: 2025-03-14
Form: 6-K
Chunk 0
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<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13A-16 OR 15D-16 OF

THE SECURITIES EXCHANGE ACT OF 1934

March 14, 2025</div>

| Commission file number: 001-10533               | Commission file number: 001-34121              |
| Rio Tinto plc                                   | Rio Tinto Limited                              |
|                                                 | ABN 96 004 458 404                             |
| (Translation of registrant’s name into English) | -Translation of registrant’s name into English |
| 6 St. James’s Square                            | Level 43, 120 Collins Street                   |
| London, SW1Y 4AD, United Kingdom                | Melbourne, Victoria 3000, Australia            |
| (Address of principal executive offices)        | -Address of principal executive offices        |

<div align='center'>Indicate by check mark whether the registrant files
or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F xForm 40-F ¨

Indicate by check mark if the registrant is submitting
the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨

Indicate by check mark if the registrant is submitting
the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ¨</div>

THIS REPORT ON FORM 6-K SHALL BE DEEMED TO BE INCORPORATED BY REFERENCE IN EACH OF THE REGISTRATION STATEMENTS ON FORM F-3 OF RIO TINTO PLC (NO. 333-238553), RIO TINTO LIMITED (NO. 333-238553-01), RIO TINTO FINANCE (USA) INC. (NO. 333-238553-02), RIO TINTO FINANCE (USA) PLC (NO. 333-238553-03), AND RIO TINTO FINANCE (USA) LIMITED (NO. 333-238553-04) AND IN THE REGISTRATION STATEMENTS ON FORM S-8 OF RIO TINTO PLC (NOS. 333-184397 AND 333-224907), AND RIO TINTO LIMITED (NO.