Take context from the input text and decide on the accurate relationship between 'Berkshire Hathaway' and 'Warren Buffett' from the options provided.
Options: member of, parent organization, chairperson, developer

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.
chairperson