Analyze the relationship between 'Warren Buffett' and 'Berkshire Hathaway' within the context of the input sentence.
Options: brand, owner of, headquarters location, member of

— Warren Buffett is making the biggest bet of his long investment career, a $32.36 billion buyout of Precision Castparts in a deal that will continue to reshape his Berkshire Hathaway conglomerate.
owner of