Refer to the input text as context and select the correct relationship between 'Katanga Mining' and 'Glencore' from the available options.
Options: chief executive officer, platform, owned by, position held

Separately, Katanga Mining (Toronto: KAT.TO - news ) announced the suspension of copper and cobalt processing operations in the Democratic Republic of Congo site for 18 months, and confirmed the continuation of the planned investment of $880m into ongoing plant upgrades at the project, in which Glencore owns a 74pc stake.
owned by