Rio Tinto completes acquisition of Sumitomo's 20.64% stake in New Zealand's aluminium smelter
1. Rio Tinto completed acquisition of Sumitomo's 20.64% in NZAS. 2. NZAS now wholly owned, reinforces commitment to New Zealand. 3. Rio also acquired a 2.46% stake in Boyne Smelters. 4. Total interest in Boyne Smelters expanded to 73.5%.