I would recommend the 2021 three-part Acquired podcast series on Berkshire. Episodes are long, though there are transcripts if you prefer reading over listening.

https://www.acquired.fm/episodes/berkshire-hathaway-part-i

https://www.acquired.fm/episodes/berkshire-hathaway-part-ii

https://www.acquired.fm/episodes/berkshire-hathaway-part-iii

That said, I'll note this quote from Buffett:

>“I'm somewhat embarrassed to say that Tim Cook has made Berkshire a lot more money than I've ever made,” Buffett told the audience, referencing the remarkable 680% surge in Apple's stock since Berkshire first began acquiring shares in early 2016.

https://finance.yahoo.com/news/warren-buffett-says-embarrass...