Other fund managers also hold major stakes in Berkshire Hathaway Class B shares. BlackRock owns nearly 111.6 million Class B shares, roughly 8.3% of the total outstanding shares. State Street Corporation ranks high on the list as well, with nearly 71.7 million Class B shares making up 5.35% of the total.

Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B) entered 2025 with the wind at its back because of an astute shift the company made in 2024. Don't expect outperformance like this in every market period,

"You're losing one of the most esteemed investors one could argue of all time," a source said of investors' reaction to Buffett's plan to step down.