Rio Tinto JV Tomago plans A$1.1b green power push
RIO TINTO PLC reported several updates.
Rhea-AI Filing Summary
RIO TINTO PLC reported several updates. Rio Tinto plc issued and allotted 12,006 ordinary shares between 1 July and 31 July 2026 under its Global Employee Share Plan. After this, issued share capital comprised 1,256,050,704 ordinary shares, of which 897,389 are held in treasury, giving 1,255,153,315 voting rights as of 31 July 2026.
Rio Tinto highlighted its role in Tomago Aluminium, an independently managed joint venture in which it holds 51.55%. Tomago Aluminium agreed a 10‑year power purchase agreement extending electricity supply to 2038, with power from 100% renewable sources from 2033. Tomago plans A$1.1 billion of investment to 2038, including A$100 million for decarbonisation, and expects a reduction of 7.1 million tonnes of Scope 1 and 2 operating carbon emissions per year once fully supplied by renewables. The smelter can produce up to 590,000 tonnes of aluminium annually and directly employs about 1,000 people.
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Key Figures
Shares issued under Global Employee Share Plan: 12,006 ordinary shares of 10p each
Issued share capital: 1,256,050,704 ordinary shares of 10p each
Treasury shares: 897,389 ordinary shares of 10p each
+5 more
8 metrics
Shares issued under Global Employee Share Plan
12,006 ordinary shares of 10p each
Issued and allotted between 1 July 2026 and 31 July 2026
Issued share capital
1,256,050,704 ordinary shares of 10p each
Rio Tinto plc issued share capital as of 31 July 2026
Treasury shares
897,389 ordinary shares of 10p each
Held in treasury and excluded from voting and dividends
Total voting rights
1,255,153,315
Total number of voting rights in Rio Tinto plc as of 31 July 2026
Tomago investment commitment
A$1.1 billion
Investment in Tomago Aluminium smelter between now and 2038
Tomago decarbonisation initiatives
A$100 million
Portion of Tomago investment allocated to decarbonisation initiatives
Expected emissions reduction
7.1 million tonnes per year
Reduction in Tomago Aluminium Scope 1 and 2 operating carbon emissions from 2033
Tomago aluminium production capacity
590,000 tonnes per year
Maximum annual aluminium production at Tomago Aluminium
Key Terms
power purchase agreement (PPA), Scope 1 and 2 operating carbon emissions, dual listed companies (‘DLC’) merger, Special Voting Share, +1 more
5 terms
power purchase agreement (PPA) financial
"Tomago Aluminium will enter into a 10-year power purchase agreement (PPA) for electricity supply"
A power purchase agreement (PPA) is a long-term contract in which a buyer agrees to purchase electricity from a specific producer at a set price and schedule. For investors, a PPA is like a guaranteed customer contract that reduces revenue uncertainty for a project and can make the producer’s cash flow and financing more predictable, similar to signing a multi-year lease that ensures steady income.
Scope 1 and 2 operating carbon emissions technical
"it will reduce the smelter’s Scope 1 and 2 operating carbon emissions by 7.1 million tonnes"
dual listed companies (‘DLC’) merger financial
"in connection with its dual listed companies (‘DLC’) merger with Rio Tinto Limited"
demand response services technical
"The smelter will continue to provide important demand response services to the New South Wales electricity system"
Demand response services pay or reward electricity users to temporarily reduce or shift their power use during times of high demand or limited supply. Like asking many households to turn down their air conditioners for a few hours instead of building a new power plant, these services matter to investors because they can lower system costs, avoid expensive infrastructure, create predictable revenue for service providers, and reduce regulatory or reliability risk for utilities and grid operators.
FAQ
What is the total number of voting rights currently in RIO TINTO PLC (RIO)?
As of 31 July 2026, Rio Tinto plc reports 1,255,153,315 voting rights, based on issued share capital of 1,256,050,704 ordinary shares and 897,389 ordinary shares held in treasury.
What are the key terms of the Tomago Aluminium power agreement involving RIO?
Tomago Aluminium will enter a 10‑year power purchase agreement for electricity supply through to 2038, with power from 100% renewable sources from 2033, following expiry of the current contract on 31 December 2028.
How much investment is planned at Tomago Aluminium and for what purpose?
Tomago Aluminium will support the new power agreement with A$1.1 billion of investment in the smelter between now and 2038, including A$100 million earmarked for decarbonisation initiatives.
What emissions impact is expected from the Tomago Aluminium renewable power shift?
Once Tomago Aluminium’s electricity is supplied by 100% renewable sources from 2033, its Scope 1 and 2 operating carbon emissions are expected to fall by 7.1 million tonnes per year.
What is Rio Tinto’s ownership stake in Tomago Aluminium and its production capacity?
Tomago Aluminium is owned by Rio Tinto at 51.55%, Gove Aluminium Finance Ltd at 36.05% and Norsk Hydro at 12.4%. The smelter can produce up to 590,000 tonnes of aluminium a year.
AI-generated analysis. How Rhea-AI works. Not financial advice.
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
Month of August 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 3 August 2026 entitled ‘Issue of Shares’.
99.2Stock Exchange announcement dated 3August 2026 entitled ‘Voting Rights and Issued Capital’.
99.3Stock Exchange announcement dated 13 August 2026 entitled ‘Rio Tinto welcomes agreement to secure long-term future of Tomago Aluminium’.
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/ Matthew Whyte | By | /s/ Tim Paine | ||||||||
Name | Matthew Whyte | Name | Tim Paine | ||||||||
| Title | Company Secretary | Title | Company Secretary | ||||||||
| Date | 1 September 2026 | Date | 1 September 2026 | ||||||||
Notice to ASX/LSE Rio Tinto welcomes agreement to secure long-term future of Tomago Aluminium 13 August 2026 MELBOURNE, Australia -- Rio Tinto has welcomed the agreement announced today between Tomago Aluminium, the Australian Government and the New South Wales Government to secure the long-term future of Australia’s largest aluminium smelter. The arrangements provide long-term certainty for Tomago Aluminium, its workforce, its customers and the Hunter region, delivering reliable, internationally competitive power to the smelter until 2038. Under the agreement, Tomago Aluminium will enter into a 10-year power purchase agreement (PPA) for electricity supply to the smelter through to 2038, with the power to be supplied by 100 per cent renewable sources from 2033. The PPA will begin following the 31 December 2028 expiry of the current electricity contract. Tomago Aluminium will support the new agreement with A$1.1 billion (in real terms) of investment in the smelter between now and 2038, including A$100 million for decarbonisation initiatives. The smelter will continue to provide important demand response services to the New South Wales electricity system. Rio Tinto Aluminium & Lithium Chief Executive Jérôme Pécresse said: “This agreement secures Tomago Aluminium's long-term future, supporting Australian manufacturing, skilled jobs and the Hunter community, as well as providing security of supply to the smelter’s global customers. "It demonstrates what can be achieved when industry, governments and workers come together to strengthen Australia’s manufacturing sector. “I want to recognise the significant work of the Commonwealth and New South Wales Governments, unions and the Tomago workforce, as well as the many people across Tomago Aluminium, Rio Tinto and our joint venture partners who helped reach this outcome. “It means Australia keeps a critical piece of sovereign manufacturing capability, while helping Tomago Aluminium continue competitively producing the aluminium needed for the global energy transition.” This Tomago agreement comes after a March 2026 agreement between Rio Tinto, the Commonwealth Government and the Queensland Government to secure a long-term future for the Boyne aluminium smelter at Gladstone and ensure it also remains internationally cost-competitive beyond its current power contract. This means Australia's two largest aluminium smelters now have a secured pathway to long-term, cost- competitive, low-carbon power beyond the expiry of their current electricity contracts. It also strengthens one of the world’s largest integrated aluminium supply chains, spanning Rio Tinto’s bauxite mines, alumina refineries and aluminium smelters in eastern Australia. Once Tomago Aluminium’s electricity is supplied by 100% renewable sources, from 2033 under the PPA, it will reduce the smelter’s Scope 1 and 2 operating carbon emissions by 7.1 million tonnes per year. Tomago Aluminium, New South Wales’ biggest electricity user, will also continue to provide large-scale demand response capability under the arrangements, helping reduce electricity use during periods of system stress, improving system reliability and supporting the integration of more renewable energy. EXHIBIT 99.3
Notice to ASX/LSE Tomago Aluminium is an independently managed joint venture owned by Rio Tinto (51.55 per cent), Gove Aluminium Finance Ltd (36.05 per cent) and Norsk Hydro (12.4 per cent). Rio Tinto continues to work towards halving its Scope 1 and 2 emissions by 2030 from a 2018 baseline. Our ability to meet our 2030 target will remain dependent on the timely delivery of renewable projects and the outcomes of other commercial discussions. Additional information Founded in 1983, Tomago Aluminium Company is Australia’s largest aluminium smelter, producing up to 590,000 tonnes of aluminium a year – almost 40 per cent of Australia’s annual aluminium production. The smelter directly employs around 1,000 people, alongside 200 full-time equivalent contractors, and supports an estimated 5,000 indirect jobs. The smelter is located at Tomago, New South Wales, approximately 13 kilometres west of Newcastle. Tomago Aluminium’s existing electricity supply contract with AGL expires in December 2028.
Notice to ASX/LSE Contacts Please direct all enquiries to media.enquiries@riotinto.com Media Relations, Media Relations, Media Relations, United Kingdom Australia Canada Matthew Klar Matt Chambers Vanessa Damha M +44 7796 630 637 M +61 433 525 739 M +1 514 715 2152 David Outhwaite Alyesha Anderson Malika Cherry M +44 7787 597 493 M +61 434 868 118 M +1 418 592 7293 Rachel Pupazzoni M +61 438 875 469 Media Relations, US & Latin America Bruce Tobin M +61 419 103 454 Jesse Riseborough M +1 202 394 9480 Investor Relations, Investor Relations, United Kingdom Australia Rachel Arellano Tom Gallop M +44 7584 609 644 M +61 439 353 948 David Ovington Eddie Gan-Och M +44 7920 010 978 M +61 477 599 714 Laura Brooks M +44 7826 942 797 Weiwei Hu M +44 7825 907 230 Rio Tinto plc Rio Tinto Limited 6 St James’s Square Level 43, 120 Collins Street London SW1Y 4AD Melbourne 3000 United Kingdom Australia T +44 20 7781 2000 T +61 3 9283 3333 Registered in England Registered in Australia No. 719885 ABN 96 004 458 404 This announcement is authorised for release to the market by Matthew Whyte, Rio Tinto’s Group Company Secretary. riotinto.com