It should come as no surprise that the most popular of these portfolios is that of renowned investor Warren Buffett , CEO of Berkshire Hathaway ( BRK.B ) and one of the richest people in the world.
Refer to the input text as context and select the correct relationship between 'Berkshire Hathaway' and 'Warren Buffett' from the available options.
Options: owned by, chairperson, director/manager, distribution format