Rio Tinto (RIO) 6-K details voting rights and new collaborations

Rhea-AI Filing Summary

Rio Tinto plc filed a 6-K summarising January 2026 announcements and confirming its share capital and voting rights. As of 31 December 2025, Rio Tinto plc had issued 1,256,010,314 ordinary shares of 10p each, including 1,717,902 shares held in treasury.

After excluding treasury shares, the company reports a total of 1,254,292,412 voting rights, which shareholders can use as the reference figure when assessing disclosure thresholds under UK transparency rules. The notice also explains the dual listed company structure with Rio Tinto Limited and notes 371,216,214 publicly held Rio Tinto Limited shares that are separate from Rio Tinto plc’s share capital.

Form 6-K: How Foreign Companies Report to the SEC →

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13A-16 OR 15D-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of January 2026

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)

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 ☒ Form 40-F ☐

EXHIBITS

99.1Stock Exchange announcement dated 2 January 2026 entitled ‘Total Voting Rights and Issued Capital’.

99.2Stock Exchange announcement dated 8 January 2026 entitled ‘2026 Key Dates’.

99.3Stock Exchange announcement dated 9 January 2026 entitled ‘Appendix 3G – Notification of issue, conversion or payment up of unquoted equity securities’.

99.4Stock Exchange announcement dated 9 January 2026 entitled ‘Appendix 3G – Notification of issue, conversion or payment up of unquoted equity securities’.

99.5Stock Exchange announcement dated 9 January 2026 entitled ‘Appendix 3H – Notification of cessation of securities’.

99.6Stock Exchange announcement dated 13 January 2026 entitled ‘Appendix 2A – Application for quotation of securities’.

99.7Media Release dated 15 January 2026 entitled ‘Rio Tinto and Amazon Web Services collaborate to bring low-carbon Nuton copper to U.S. data centres’.

99.8Media Release dated 15 January 2026 entitled ‘Rio Tinto and BHP explore collaboration to mine up to 200 million tonnes of Pilbara iron ore’.

99.9Stock Exchange announcement dated 16 January 2026 entitled ‘Form 604 – Notice of change of interests of substantial holder’.

99.10Stock Exchange announcement dated 19 January 2026 entitled ‘Form 604 – Notice of change of interests of substantial holder’.

99.11Stock Exchange announcement dated 22 January 2026 entitled ‘Public Opening Position Disclosure by a Party to an Offer’.

99.12Stock Exchange announcement dated 22 January 2026 entitled ‘Public Opening Position Disclosure by a Party to an Offer’.

99.13Stock Exchange announcement dated 22 January 2026 entitled ‘Shareholdings of persons discharging managerial responsibility (PDMR) / Key Management Personnel (KMP)’.

99.14Stock Exchange announcement dated 29 January 2026 entitled ‘Public Dealing Disclosure by a Party to an Offer or Person Acting in Concert (including dealings for the account of discretionary investment clients)’.

99.15Stock Exchange announcement dated 29 January 2026 entitled ‘Public Opening Position Disclosure by a Party to an Offer (amendment)’.

99.16Media Release dated 30 January 2026 entitled ‘Rio Tinto strengthens its global low-carbon aluminium footprint through joint acquisition with Chalco of Votorantim’s interest in CBA’.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrants have duly caused this report to be signed on their behalf by the undersigned, thereunto duly authorised.

Rio Tinto plc						Rio Tinto Limited
(Registrant)						(Registrant)
By			/s/ Andrew Hodges			By			/s/ Tim Paine
Name			Andrew Hodges			Name			Tim Paine
Title			Company Secretary			Title			Company Secretary
Date			2 February 2026			Date			2 February 2026

EXHIBIT 99.1

Notice to LSE

Total Voting Rights and Issued Capital

2 January 2026

In accordance with the Financial Conduct Authority’s (FCA) Disclosure Guidance and Transparency Rule 5.6.1R, Rio Tinto plc notifies the market that as of 31 December 2025:

1.Rio Tinto plc’s issued share capital comprised 1,256,010,314 Ordinary shares of 10p each, each with one vote.

2.1,717,902 Ordinary shares of 10p each are held in treasury. These shares are not taken into consideration in relation to the payment of dividends and voting at shareholder meetings.

Accordingly the total number of voting rights in Rio Tinto plc is 1,254,292,412. This figure may be used by shareholders (and others with notification obligations) as the denominator for the calculation by which they will determine if they are required to notify their interest in, or a change to their interest in, Rio Tinto plc under the FCA’s Disclosure Guidance and Transparency Rules.

Note:

As at the date of this announcement:

(a)Rio Tinto plc has also issued one Special Voting Share of 10p and one DLC Dividend Share of 10p in connection with its dual listed companies (‘DLC’) merger with Rio Tinto Limited which was designed to place the shareholders of both companies in substantially the same position as if they held shares in a single enterprise owning all of the assets of both companies;

(b)the Special Voting Share facilitates joint voting by shareholders of Rio Tinto plc and Rio Tinto Limited on joint electorate resolutions; and

(c)there are 371,216,214 publicly held Rio Tinto Limited shares in issue which do not form part of the share capital of Rio Tinto plc.

LEI: 213800YOEO5OQ72G2R82

Classification: 2.5 Total number of voting rights and capital disclosed under article 15 of the Transparency Directive

Notice to LSE    2 / 2

Contacts

Please direct all enquiries to media.enquiries@riotinto.com

Media Relations, United Kingdom Matthew Klar  M +44 7796 630 637 David Outhwaite M +44 7787 597 493			Media Relations, Australia Matt Chambers M +61 433 525 739 Alyesha Anderson M +61 434 868 118 Rachel Pupazzoni M +61 438 875 469 Bruce Tobin   M +61 419 103 454			Media Relations, Canada Simon Letendre M +1 514 796 4973 Malika Cherry M +1 418 592 7293 Vanessa Damha M +1 514 715 2152 Media Relations, US & Latin America Jesse Riseborough M +1 202 394 9480
Investor Relations, United Kingdom Rachel Arellano M: +44 7584 609 644 David Ovington M +44 7920 010 978 Laura Brooks M +44 7826 942 797  Weiwei Hu  M +44 7825 907 230			Investor Relations, Australia Tom Gallop M +61 439 353 948 Eddie Gan-Och  M +976 95 091 237
Rio Tinto plc 6 St James’s Square London SW1Y 4AD United Kingdom T +44 20 7781 2000 Registered in England No. 719885			Rio Tinto Limited Level 43, 120 Collins Street Melbourne 3000 Australia T +61 3 9283 3333 Registered in Australia ABN 96 004 458 404

This announcement is authorised for release to the market by Andy Hodges, Rio Tinto’s Group Company Secretary.

riotinto.com

FAQ

What total voting rights does Rio Tinto plc (RIO) report as of 31 December 2025?

Rio Tinto plc reports a total of 1,254,292,412 voting rights as of 31 December 2025. This figure excludes 1,717,902 treasury shares and serves as the denominator for shareholders’ disclosure obligations under the UK Financial Conduct Authority transparency rules.

How many ordinary shares has Rio Tinto plc (RIO) issued?

Rio Tinto plc’s issued share capital comprises 1,256,010,314 ordinary shares of 10p each, with one vote per share. A portion, specifically 1,717,902 shares, is held in treasury, which do not carry voting rights or entitlement to dividends while they remain in treasury.

What treasury shares does Rio Tinto plc (RIO) hold and what is their effect?

Rio Tinto plc holds 1,717,902 ordinary shares of 10p each in treasury. These treasury shares are excluded from dividend payments and voting at shareholder meetings, which is why they are deducted when calculating the total number of voting rights in the company.

How does Rio Tinto’s dual listed company structure with Rio Tinto Limited work?

Rio Tinto plc has issued a Special Voting Share and a DLC Dividend Share of 10p each in connection with its dual listed company merger with Rio Tinto Limited. This structure is designed to place shareholders of both companies in substantially the same position as if they held shares in a single enterprise.

How many Rio Tinto Limited shares are publicly held and how do they relate to Rio Tinto plc?

There are 371,216,214 publicly held Rio Tinto Limited shares in issue. These shares form part of Rio Tinto Limited’s capital and do not form part of the share capital of Rio Tinto plc, although they sit within the broader dual listed company arrangement.

What types of announcements are attached to Rio Tinto’s January 2026 6-K filing?

The 6-K attaches multiple January 2026 announcements, including voting rights and issued capital disclosures, key corporate dates, equity security notifications, substantial holder interest changes, and media releases on collaboration with Amazon Web Services, BHP, and a joint acquisition with Chalco in low-carbon aluminium.