The entity started as a bauxite mining venture by Alcoa.
Exported its first shipment of bauxite.
The venture began alumina production at a new refinery in Halse Hall, Clarendon in 1972 with a production capacity of 500,000 metric tonnes per year (mtpy), which it exported from its port facility at Rocky Point.
The Government of Jamaica acquired a 50 percent share in the operations. The resulting joint venture was named Jamalco, with Alcoa as the managing partner.
Through expansion, Jamalco’s ownership structure changed with Alcoa owning 55 percent and the Government of Jamaica, 45 percent
Global commodities company Noble Group (SGX N21) acquired Alcoa’s 55 percent stake in Jamalco, while Clarendon Alumina Production Limited (CAP) retains its 45 percent ownership of the joint venture.
Century Aluminum acquires Noble Group's 55% of shares.
