In the context of the input sentence, determine the relationship between 'Warren Buffett' and 'Berkshire Hathaway'.
Options: director/manager, owner of, legal form, distributed by

(AP) -- 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