These 10 Stocks Make Up 87% of Warren Buffett's Portfolio

When it comes to investing success, Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B) CEO Warren Buffett is in a class of his own. Buffett may not be infallible, but he's helped create more than $600 billion in shareholder value for the company's shareholders since taking the helm in 1965. As a whole, Berkshire Hathaway's shares have averaged an annual gain of 20% over the past 56 years, leading to an aggregate gain of better than 3,300,000%.

Interestingly, though, the Oracle of Omaha's success isn't the result of diversification. Buffett believes diversification is only a necessity if you don't know what you're doing. As of this past weekend, the cumulative value of the nearly four dozen stocks held by Berkshire Hathaway was $329.7 billion. However, just 10 companies made up $286.1 billion, or 87%, of Warren Buffett's portfolio.

Berkshire Hathaway CEO Warren Buffett. Image source: The Motley Fool.

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Source Fool.com