Key TakeawaysAlcoa has finalized a deal to buy Alumina Limited for about $2.2 billion.The deal, announced last month, will give Alumina shareholders a 31.25% ownership stake in the combined venture.The two companies have operated a joint venture called Alcoa World Alumina and Chemicals for decades, mining, refining, and smelting materials like bauxite and alumina around the world.The acquisition is set to be completed in the third quarter of 2024. Alcoa (AA), one of the world's largest aluminum producers, h ...