EX-99.4 5 ex04d03boyne1165.htm EX-99.4

	EXHIBIT 99.4

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Rio Tinto completes acquisition of Mitsubishi’s 11.65% stake in

the Boyne aluminium smelter

03 October 2024

Rio Tinto’s previously announced acquisition of Mitsubishi Corporation’s (Mitsubishi) 11.65% interest in

Boyne Smelters Limited (BSL) was completed on 30 September 2024. BSL owns and operates the

Boyne Island aluminium smelter in Gladstone, Australia.

 

Following completion of the transaction, Rio Tinto’s interest in BSL is now 71.04%.  

 

Rio Tinto looks forward to continuing to work with its BSL joint venture partners and other stakeholders

on securing a competitive low-carbon future for its Gladstone operations. 

 

Previously announced acquisitions by Rio Tinto of Sumitomo Chemical Company’s (SCC) 2.46% stake

in BSL, and SCC’s 20.64% interest in New Zealand Aluminium Smelters (NZAS), which owns and

operates the Tiwai Point aluminium smelter in New Zealand, continue to progress through various

conditions precedent.  

The acquisition of Mitsubishi’s stake in BSL was for an undisclosed price, as is also the case for the

agreed acquisitions of SCC’s stakes in BSL and NZAS.   

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