I happen to like Berkshire Hathaway but it doesn’t fit nicely into one ‘bucket’ given they own such a wide range of companies. I see it as a free thematic ETF, the theme being stuff Warren Buffet & Charlie Monger like.
The annual investor letter is good reading for holder but I think also for investors generally, can be found here. There was the ‘Woodstock for value investors’ yesterday which is their annual meeting.