Warren Buffett might have the all-time most extraordinary investment track record when all is said and done. His holding company, Berkshire Hathaway, has beaten the S 500 by a wide margin for decades.

Berkshire is a holding company with dozens of private businesses and investments. However, investors follow the company's massive $371 billion stock portfolio the closest. Despite holding 51 stocks, just six make up over 80% of the portfolio's value. What does this mean, and how can investors apply Warren Buffett's wisdom to their investment strategy?

Berkshire Hathaway, one of the world's largest corporations, has over 80% of its stock portfolio in just six companies. Here they are:

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Source Fool.com