Take context from the input text and decide on the accurate relationship between 'Warren Buffett' and 'Berkshire Hathaway' from the options provided.
Options: owner of, brand, legal form, operator

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