Berkshire Hathaway Class A (NYSE: BRK.A) stands as the most expensive publicly traded stock in the world by absolute share price, trading at valuations exceeding $740,000 per single share. This exceptionally high nominal price is the direct result of legendary investor Warren Buffett's long-standing corporate policy never to execute a stock split for its Class A shares. By allowing the share price to reflect decades of accumulated compounding corporate growth, Berkshire Hathaway has maintained a unique equity structure that naturally filters for long-term institutional and committed retail investors.