Berkshire Hathaway owns a lot of stocks in its huge $347 billion portfolio. The average investor could peek at this list of holdings to find potential investment opportunities to allocate some cash to. 

Among some of the relatively smaller positions that Warren Buffett owns, investors will find (NYSE: V) and Mastercard (NYSE: MA). Both stocks have crushed the broader market in the past decade. 

It's worth learning more about these incredibly lucrative card payments giants, which just might be two of the best businesses in the world. 

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Source Fool.com