What is the relationship between Xstrata and Glencore in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

Mining and trading company Glencore Plc (Xetra: A1JAGV - news ) , former Xstrata Chief Executive Officer Mick Davis' X2, and British investment firm Audley Capital (Other OTC: CGHC - news ) were among the first round of bidders, sources told Reuters in June.

Answer: owned_by