Mirror, mirror, on the wall, what's the biggest company of all? That might seem like an easy question to answer. Just use a stock screen that sorts by descending market cap.

For much of the past few years, Apple (NASDAQ: AAPL) claimed the biggest market cap of all publicly traded companies. Thanks to a huge generative AI tailwind, (NASDAQ: MSFT) took over the No. 1 spot earlier in 2024. This AI boost has also put Nvidia (NASDAQ: NVDA) within striking distance of the top position.

But the real answer to the question depends on how you define "biggest." Warren Buffett recently discussed the biggest company based on net worth as measured by generally accepted accounting principles (GAAP). And it isn't Apple, Microsoft, or Nvidia.

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Source Fool.com