Utilize the input text as a context reference, choose the right relationship between 'Berkshire Hathaway' and 'Warren Buffett' from the options.
Options: developer, chairperson, creator, director/manager

NEW YORK (Reuters) - Billionaire investing icon Warren Buffett said on Tuesday that there are dozens of countries in which his sprawling Berkshire Hathaway conglomerate would be interested in buying new businesses.
director/manager