In the context of the input sentence, determine the relationship between 'Ivan Glasenberg' and 'Glencore'.
Options: parent organization, owner of, owned by, chief executive officer

LONDON—Collapsing commodity prices have forced one of the mining world’s most aggressive chief executives into retreat, pushing Glencore PLC’s Ivan Glasenberg on Monday to scrap the company’s dividend, issue more stock and sell assets.
owner of