As one of the richest people in the world, it can pay to track Bill Gates' portfolio. The biggest position currently in the Bill Melinda Gates Foundation Trust is, unsurprisingly, , representing a stake worth roughly $14 billion.

His second-largest position, however, worth around $7.1 billion, is a much different kind of business. It's a diversified holding company, one most investors are likely familiar with.

The second-largest position in Bill Gates's trust portfolio is none other than Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B), the holding company founded by Warren Buffett. This shouldn't be surprising to anyone who has followed their long-term friendship. The two have been friends for over three decades. Over that time, they've shared a lot of wisdom with each other.

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Source Fool.com