LONDON, Feb 14 (Reuters) - Glencore's Katanga operation in Africa held unsold stocks of 12,797 tonnes of battery material cobalt with a current market value of more than $400 million at the end of last year, statements from Katanga show.
Toronto-listed Katanga Mining KAT.TO , mostly owned by London-listed Glencore GLEN.L produced 17,054 tonnes of cobalt contained in hydroxide last year and sold only 4,257 tonnes over the same period.