With the $37.2 billion deal to buy Precision Castparts (NYSE: PCP - news ) announced Monday, US investment guru Warren Buffett is extending his storied Berkshire Hathaway (Sao Paolo: BERK34.SA - news ) holding company.
In the context of the input sentence, determine the relationship between 'Berkshire Hathaway' and 'Warren Buffett'.
Options: position held, owned by, original broadcaster, platform