Berkshire Hathaway $BRK.B has always been an odd public company: a trillion-dollar conglomerate that, for most of modern finance, has operated like a one-man central bank with a folksy press office. Warren Buffett didn’t just compound money; he compounded confidence — the belief that someone level-headed was at the wheel, even when the market was acting like a driver who thinks turn signals are optional. Today, Dec. 31, 2025, the belief in his company gets its first real stress test, because today is Buffett’s last day as Berkshire’s CEO.
